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/io.h> 27 #include <asm/todclk.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 MODULE_LICENSE("GPL"); 58 59 static struct dasd_discipline dasd_eckd_discipline; 60 61 /* The ccw bus type uses this table to find devices that it sends to 62 * dasd_eckd_probe */ 63 static struct ccw_device_id dasd_eckd_ids[] = { 64 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 65 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 66 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3}, 67 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 68 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 69 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 70 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 71 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 72 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 73 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 74 { /* end of list */ }, 75 }; 76 77 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 78 79 static struct ccw_driver dasd_eckd_driver; /* see below */ 80 81 /* initial attempt at a probe function. this can be simplified once 82 * the other detection code is gone */ 83 static int 84 dasd_eckd_probe (struct ccw_device *cdev) 85 { 86 int ret; 87 88 /* set ECKD specific ccw-device options */ 89 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE); 90 if (ret) { 91 DBF_EVENT(DBF_WARNING, 92 "dasd_eckd_probe: could not set ccw-device options " 93 "for %s\n", dev_name(&cdev->dev)); 94 return ret; 95 } 96 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 97 return ret; 98 } 99 100 static int 101 dasd_eckd_set_online(struct ccw_device *cdev) 102 { 103 return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 104 } 105 106 static const int sizes_trk0[] = { 28, 148, 84 }; 107 #define LABEL_SIZE 140 108 109 static inline unsigned int 110 round_up_multiple(unsigned int no, unsigned int mult) 111 { 112 int rem = no % mult; 113 return (rem ? no - rem + mult : no); 114 } 115 116 static inline unsigned int 117 ceil_quot(unsigned int d1, unsigned int d2) 118 { 119 return (d1 + (d2 - 1)) / d2; 120 } 121 122 static unsigned int 123 recs_per_track(struct dasd_eckd_characteristics * rdc, 124 unsigned int kl, unsigned int dl) 125 { 126 int dn, kn; 127 128 switch (rdc->dev_type) { 129 case 0x3380: 130 if (kl) 131 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 132 ceil_quot(dl + 12, 32)); 133 else 134 return 1499 / (15 + ceil_quot(dl + 12, 32)); 135 case 0x3390: 136 dn = ceil_quot(dl + 6, 232) + 1; 137 if (kl) { 138 kn = ceil_quot(kl + 6, 232) + 1; 139 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 140 9 + ceil_quot(dl + 6 * dn, 34)); 141 } else 142 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 143 case 0x9345: 144 dn = ceil_quot(dl + 6, 232) + 1; 145 if (kl) { 146 kn = ceil_quot(kl + 6, 232) + 1; 147 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 148 ceil_quot(dl + 6 * dn, 34)); 149 } else 150 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 151 } 152 return 0; 153 } 154 155 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 156 { 157 geo->cyl = (__u16) cyl; 158 geo->head = cyl >> 16; 159 geo->head <<= 4; 160 geo->head |= head; 161 } 162 163 static int 164 check_XRC (struct ccw1 *de_ccw, 165 struct DE_eckd_data *data, 166 struct dasd_device *device) 167 { 168 struct dasd_eckd_private *private; 169 int rc; 170 171 private = (struct dasd_eckd_private *) device->private; 172 if (!private->rdc_data.facilities.XRC_supported) 173 return 0; 174 175 /* switch on System Time Stamp - needed for XRC Support */ 176 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 177 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 178 179 rc = get_sync_clock(&data->ep_sys_time); 180 /* Ignore return code if sync clock is switched off. */ 181 if (rc == -ENOSYS || rc == -EACCES) 182 rc = 0; 183 184 de_ccw->count = sizeof(struct DE_eckd_data); 185 de_ccw->flags |= CCW_FLAG_SLI; 186 return rc; 187 } 188 189 static int 190 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 191 unsigned int totrk, int cmd, struct dasd_device *device) 192 { 193 struct dasd_eckd_private *private; 194 u32 begcyl, endcyl; 195 u16 heads, beghead, endhead; 196 int rc = 0; 197 198 private = (struct dasd_eckd_private *) device->private; 199 200 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 201 ccw->flags = 0; 202 ccw->count = 16; 203 ccw->cda = (__u32) __pa(data); 204 205 memset(data, 0, sizeof(struct DE_eckd_data)); 206 switch (cmd) { 207 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 208 case DASD_ECKD_CCW_READ_RECORD_ZERO: 209 case DASD_ECKD_CCW_READ: 210 case DASD_ECKD_CCW_READ_MT: 211 case DASD_ECKD_CCW_READ_CKD: 212 case DASD_ECKD_CCW_READ_CKD_MT: 213 case DASD_ECKD_CCW_READ_KD: 214 case DASD_ECKD_CCW_READ_KD_MT: 215 case DASD_ECKD_CCW_READ_COUNT: 216 data->mask.perm = 0x1; 217 data->attributes.operation = private->attrib.operation; 218 break; 219 case DASD_ECKD_CCW_WRITE: 220 case DASD_ECKD_CCW_WRITE_MT: 221 case DASD_ECKD_CCW_WRITE_KD: 222 case DASD_ECKD_CCW_WRITE_KD_MT: 223 data->mask.perm = 0x02; 224 data->attributes.operation = private->attrib.operation; 225 rc = check_XRC (ccw, data, device); 226 break; 227 case DASD_ECKD_CCW_WRITE_CKD: 228 case DASD_ECKD_CCW_WRITE_CKD_MT: 229 data->attributes.operation = DASD_BYPASS_CACHE; 230 rc = check_XRC (ccw, data, device); 231 break; 232 case DASD_ECKD_CCW_ERASE: 233 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 234 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 235 data->mask.perm = 0x3; 236 data->mask.auth = 0x1; 237 data->attributes.operation = DASD_BYPASS_CACHE; 238 rc = check_XRC (ccw, data, device); 239 break; 240 default: 241 dev_err(&device->cdev->dev, 242 "0x%x is not a known command\n", cmd); 243 break; 244 } 245 246 data->attributes.mode = 0x3; /* ECKD */ 247 248 if ((private->rdc_data.cu_type == 0x2105 || 249 private->rdc_data.cu_type == 0x2107 || 250 private->rdc_data.cu_type == 0x1750) 251 && !(private->uses_cdl && trk < 2)) 252 data->ga_extended |= 0x40; /* Regular Data Format Mode */ 253 254 heads = private->rdc_data.trk_per_cyl; 255 begcyl = trk / heads; 256 beghead = trk % heads; 257 endcyl = totrk / heads; 258 endhead = totrk % heads; 259 260 /* check for sequential prestage - enhance cylinder range */ 261 if (data->attributes.operation == DASD_SEQ_PRESTAGE || 262 data->attributes.operation == DASD_SEQ_ACCESS) { 263 264 if (endcyl + private->attrib.nr_cyl < private->real_cyl) 265 endcyl += private->attrib.nr_cyl; 266 else 267 endcyl = (private->real_cyl - 1); 268 } 269 270 set_ch_t(&data->beg_ext, begcyl, beghead); 271 set_ch_t(&data->end_ext, endcyl, endhead); 272 return rc; 273 } 274 275 static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 276 struct dasd_device *device) 277 { 278 struct dasd_eckd_private *private; 279 int rc; 280 281 private = (struct dasd_eckd_private *) device->private; 282 if (!private->rdc_data.facilities.XRC_supported) 283 return 0; 284 285 /* switch on System Time Stamp - needed for XRC Support */ 286 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 287 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 288 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 289 290 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 291 /* Ignore return code if sync clock is switched off. */ 292 if (rc == -ENOSYS || rc == -EACCES) 293 rc = 0; 294 return rc; 295 } 296 297 static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 298 unsigned int rec_on_trk, int count, int cmd, 299 struct dasd_device *device, unsigned int reclen, 300 unsigned int tlf) 301 { 302 struct dasd_eckd_private *private; 303 int sector; 304 int dn, d; 305 306 private = (struct dasd_eckd_private *) device->private; 307 308 memset(data, 0, sizeof(*data)); 309 sector = 0; 310 if (rec_on_trk) { 311 switch (private->rdc_data.dev_type) { 312 case 0x3390: 313 dn = ceil_quot(reclen + 6, 232); 314 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 315 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 316 break; 317 case 0x3380: 318 d = 7 + ceil_quot(reclen + 12, 32); 319 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 320 break; 321 } 322 } 323 data->sector = sector; 324 /* note: meaning of count depends on the operation 325 * for record based I/O it's the number of records, but for 326 * track based I/O it's the number of tracks 327 */ 328 data->count = count; 329 switch (cmd) { 330 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 331 data->operation.orientation = 0x3; 332 data->operation.operation = 0x03; 333 break; 334 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 335 data->operation.orientation = 0x3; 336 data->operation.operation = 0x16; 337 break; 338 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 339 data->operation.orientation = 0x1; 340 data->operation.operation = 0x03; 341 data->count++; 342 break; 343 case DASD_ECKD_CCW_READ_RECORD_ZERO: 344 data->operation.orientation = 0x3; 345 data->operation.operation = 0x16; 346 data->count++; 347 break; 348 case DASD_ECKD_CCW_WRITE: 349 case DASD_ECKD_CCW_WRITE_MT: 350 case DASD_ECKD_CCW_WRITE_KD: 351 case DASD_ECKD_CCW_WRITE_KD_MT: 352 data->auxiliary.length_valid = 0x1; 353 data->length = reclen; 354 data->operation.operation = 0x01; 355 break; 356 case DASD_ECKD_CCW_WRITE_CKD: 357 case DASD_ECKD_CCW_WRITE_CKD_MT: 358 data->auxiliary.length_valid = 0x1; 359 data->length = reclen; 360 data->operation.operation = 0x03; 361 break; 362 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 363 data->auxiliary.length_valid = 0x1; 364 data->length = reclen; /* not tlf, as one might think */ 365 data->operation.operation = 0x3F; 366 data->extended_operation = 0x23; 367 break; 368 case DASD_ECKD_CCW_READ: 369 case DASD_ECKD_CCW_READ_MT: 370 case DASD_ECKD_CCW_READ_KD: 371 case DASD_ECKD_CCW_READ_KD_MT: 372 data->auxiliary.length_valid = 0x1; 373 data->length = reclen; 374 data->operation.operation = 0x06; 375 break; 376 case DASD_ECKD_CCW_READ_CKD: 377 case DASD_ECKD_CCW_READ_CKD_MT: 378 data->auxiliary.length_valid = 0x1; 379 data->length = reclen; 380 data->operation.operation = 0x16; 381 break; 382 case DASD_ECKD_CCW_READ_COUNT: 383 data->operation.operation = 0x06; 384 break; 385 case DASD_ECKD_CCW_READ_TRACK_DATA: 386 data->auxiliary.length_valid = 0x1; 387 data->length = tlf; 388 data->operation.operation = 0x0C; 389 break; 390 case DASD_ECKD_CCW_ERASE: 391 data->length = reclen; 392 data->auxiliary.length_valid = 0x1; 393 data->operation.operation = 0x0b; 394 break; 395 default: 396 DBF_DEV_EVENT(DBF_ERR, device, 397 "fill LRE unknown opcode 0x%x", cmd); 398 BUG(); 399 } 400 set_ch_t(&data->seek_addr, 401 trk / private->rdc_data.trk_per_cyl, 402 trk % private->rdc_data.trk_per_cyl); 403 data->search_arg.cyl = data->seek_addr.cyl; 404 data->search_arg.head = data->seek_addr.head; 405 data->search_arg.record = rec_on_trk; 406 } 407 408 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 409 unsigned int trk, unsigned int totrk, int cmd, 410 struct dasd_device *basedev, struct dasd_device *startdev, 411 unsigned char format, unsigned int rec_on_trk, int count, 412 unsigned int blksize, unsigned int tlf) 413 { 414 struct dasd_eckd_private *basepriv, *startpriv; 415 struct DE_eckd_data *dedata; 416 struct LRE_eckd_data *lredata; 417 u32 begcyl, endcyl; 418 u16 heads, beghead, endhead; 419 int rc = 0; 420 421 basepriv = (struct dasd_eckd_private *) basedev->private; 422 startpriv = (struct dasd_eckd_private *) startdev->private; 423 dedata = &pfxdata->define_extent; 424 lredata = &pfxdata->locate_record; 425 426 ccw->cmd_code = DASD_ECKD_CCW_PFX; 427 ccw->flags = 0; 428 ccw->count = sizeof(*pfxdata); 429 ccw->cda = (__u32) __pa(pfxdata); 430 431 memset(pfxdata, 0, sizeof(*pfxdata)); 432 /* prefix data */ 433 if (format > 1) { 434 DBF_DEV_EVENT(DBF_ERR, basedev, 435 "PFX LRE unknown format 0x%x", format); 436 BUG(); 437 return -EINVAL; 438 } 439 pfxdata->format = format; 440 pfxdata->base_address = basepriv->ned->unit_addr; 441 pfxdata->base_lss = basepriv->ned->ID; 442 pfxdata->validity.define_extent = 1; 443 444 /* private uid is kept up to date, conf_data may be outdated */ 445 if (startpriv->uid.type != UA_BASE_DEVICE) { 446 pfxdata->validity.verify_base = 1; 447 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 448 pfxdata->validity.hyper_pav = 1; 449 } 450 451 /* define extend data (mostly)*/ 452 switch (cmd) { 453 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 454 case DASD_ECKD_CCW_READ_RECORD_ZERO: 455 case DASD_ECKD_CCW_READ: 456 case DASD_ECKD_CCW_READ_MT: 457 case DASD_ECKD_CCW_READ_CKD: 458 case DASD_ECKD_CCW_READ_CKD_MT: 459 case DASD_ECKD_CCW_READ_KD: 460 case DASD_ECKD_CCW_READ_KD_MT: 461 case DASD_ECKD_CCW_READ_COUNT: 462 dedata->mask.perm = 0x1; 463 dedata->attributes.operation = basepriv->attrib.operation; 464 break; 465 case DASD_ECKD_CCW_READ_TRACK_DATA: 466 dedata->mask.perm = 0x1; 467 dedata->attributes.operation = basepriv->attrib.operation; 468 dedata->blk_size = 0; 469 break; 470 case DASD_ECKD_CCW_WRITE: 471 case DASD_ECKD_CCW_WRITE_MT: 472 case DASD_ECKD_CCW_WRITE_KD: 473 case DASD_ECKD_CCW_WRITE_KD_MT: 474 dedata->mask.perm = 0x02; 475 dedata->attributes.operation = basepriv->attrib.operation; 476 rc = check_XRC_on_prefix(pfxdata, basedev); 477 break; 478 case DASD_ECKD_CCW_WRITE_CKD: 479 case DASD_ECKD_CCW_WRITE_CKD_MT: 480 dedata->attributes.operation = DASD_BYPASS_CACHE; 481 rc = check_XRC_on_prefix(pfxdata, basedev); 482 break; 483 case DASD_ECKD_CCW_ERASE: 484 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 485 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 486 dedata->mask.perm = 0x3; 487 dedata->mask.auth = 0x1; 488 dedata->attributes.operation = DASD_BYPASS_CACHE; 489 rc = check_XRC_on_prefix(pfxdata, basedev); 490 break; 491 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 492 dedata->mask.perm = 0x02; 493 dedata->attributes.operation = basepriv->attrib.operation; 494 dedata->blk_size = blksize; 495 rc = check_XRC_on_prefix(pfxdata, basedev); 496 break; 497 default: 498 DBF_DEV_EVENT(DBF_ERR, basedev, 499 "PFX LRE unknown opcode 0x%x", cmd); 500 BUG(); 501 return -EINVAL; 502 } 503 504 dedata->attributes.mode = 0x3; /* ECKD */ 505 506 if ((basepriv->rdc_data.cu_type == 0x2105 || 507 basepriv->rdc_data.cu_type == 0x2107 || 508 basepriv->rdc_data.cu_type == 0x1750) 509 && !(basepriv->uses_cdl && trk < 2)) 510 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 511 512 heads = basepriv->rdc_data.trk_per_cyl; 513 begcyl = trk / heads; 514 beghead = trk % heads; 515 endcyl = totrk / heads; 516 endhead = totrk % heads; 517 518 /* check for sequential prestage - enhance cylinder range */ 519 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 520 dedata->attributes.operation == DASD_SEQ_ACCESS) { 521 522 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 523 endcyl += basepriv->attrib.nr_cyl; 524 else 525 endcyl = (basepriv->real_cyl - 1); 526 } 527 528 set_ch_t(&dedata->beg_ext, begcyl, beghead); 529 set_ch_t(&dedata->end_ext, endcyl, endhead); 530 531 if (format == 1) { 532 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 533 basedev, blksize, tlf); 534 } 535 536 return rc; 537 } 538 539 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 540 unsigned int trk, unsigned int totrk, int cmd, 541 struct dasd_device *basedev, struct dasd_device *startdev) 542 { 543 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 544 0, 0, 0, 0, 0); 545 } 546 547 static void 548 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 549 unsigned int rec_on_trk, int no_rec, int cmd, 550 struct dasd_device * device, int reclen) 551 { 552 struct dasd_eckd_private *private; 553 int sector; 554 int dn, d; 555 556 private = (struct dasd_eckd_private *) device->private; 557 558 DBF_DEV_EVENT(DBF_INFO, device, 559 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 560 trk, rec_on_trk, no_rec, cmd, reclen); 561 562 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 563 ccw->flags = 0; 564 ccw->count = 16; 565 ccw->cda = (__u32) __pa(data); 566 567 memset(data, 0, sizeof(struct LO_eckd_data)); 568 sector = 0; 569 if (rec_on_trk) { 570 switch (private->rdc_data.dev_type) { 571 case 0x3390: 572 dn = ceil_quot(reclen + 6, 232); 573 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 574 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 575 break; 576 case 0x3380: 577 d = 7 + ceil_quot(reclen + 12, 32); 578 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 579 break; 580 } 581 } 582 data->sector = sector; 583 data->count = no_rec; 584 switch (cmd) { 585 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 586 data->operation.orientation = 0x3; 587 data->operation.operation = 0x03; 588 break; 589 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 590 data->operation.orientation = 0x3; 591 data->operation.operation = 0x16; 592 break; 593 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 594 data->operation.orientation = 0x1; 595 data->operation.operation = 0x03; 596 data->count++; 597 break; 598 case DASD_ECKD_CCW_READ_RECORD_ZERO: 599 data->operation.orientation = 0x3; 600 data->operation.operation = 0x16; 601 data->count++; 602 break; 603 case DASD_ECKD_CCW_WRITE: 604 case DASD_ECKD_CCW_WRITE_MT: 605 case DASD_ECKD_CCW_WRITE_KD: 606 case DASD_ECKD_CCW_WRITE_KD_MT: 607 data->auxiliary.last_bytes_used = 0x1; 608 data->length = reclen; 609 data->operation.operation = 0x01; 610 break; 611 case DASD_ECKD_CCW_WRITE_CKD: 612 case DASD_ECKD_CCW_WRITE_CKD_MT: 613 data->auxiliary.last_bytes_used = 0x1; 614 data->length = reclen; 615 data->operation.operation = 0x03; 616 break; 617 case DASD_ECKD_CCW_READ: 618 case DASD_ECKD_CCW_READ_MT: 619 case DASD_ECKD_CCW_READ_KD: 620 case DASD_ECKD_CCW_READ_KD_MT: 621 data->auxiliary.last_bytes_used = 0x1; 622 data->length = reclen; 623 data->operation.operation = 0x06; 624 break; 625 case DASD_ECKD_CCW_READ_CKD: 626 case DASD_ECKD_CCW_READ_CKD_MT: 627 data->auxiliary.last_bytes_used = 0x1; 628 data->length = reclen; 629 data->operation.operation = 0x16; 630 break; 631 case DASD_ECKD_CCW_READ_COUNT: 632 data->operation.operation = 0x06; 633 break; 634 case DASD_ECKD_CCW_ERASE: 635 data->length = reclen; 636 data->auxiliary.last_bytes_used = 0x1; 637 data->operation.operation = 0x0b; 638 break; 639 default: 640 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 641 "opcode 0x%x", cmd); 642 } 643 set_ch_t(&data->seek_addr, 644 trk / private->rdc_data.trk_per_cyl, 645 trk % private->rdc_data.trk_per_cyl); 646 data->search_arg.cyl = data->seek_addr.cyl; 647 data->search_arg.head = data->seek_addr.head; 648 data->search_arg.record = rec_on_trk; 649 } 650 651 /* 652 * Returns 1 if the block is one of the special blocks that needs 653 * to get read/written with the KD variant of the command. 654 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 655 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 656 * Luckily the KD variants differ only by one bit (0x08) from the 657 * normal variant. So don't wonder about code like: 658 * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 659 * ccw->cmd_code |= 0x8; 660 */ 661 static inline int 662 dasd_eckd_cdl_special(int blk_per_trk, int recid) 663 { 664 if (recid < 3) 665 return 1; 666 if (recid < blk_per_trk) 667 return 0; 668 if (recid < 2 * blk_per_trk) 669 return 1; 670 return 0; 671 } 672 673 /* 674 * Returns the record size for the special blocks of the cdl format. 675 * Only returns something useful if dasd_eckd_cdl_special is true 676 * for the recid. 677 */ 678 static inline int 679 dasd_eckd_cdl_reclen(int recid) 680 { 681 if (recid < 3) 682 return sizes_trk0[recid]; 683 return LABEL_SIZE; 684 } 685 686 /* 687 * Generate device unique id that specifies the physical device. 688 */ 689 static int dasd_eckd_generate_uid(struct dasd_device *device, 690 struct dasd_uid *uid) 691 { 692 struct dasd_eckd_private *private; 693 int count; 694 695 private = (struct dasd_eckd_private *) device->private; 696 if (!private) 697 return -ENODEV; 698 if (!private->ned || !private->gneq) 699 return -ENODEV; 700 701 memset(uid, 0, sizeof(struct dasd_uid)); 702 memcpy(uid->vendor, private->ned->HDA_manufacturer, 703 sizeof(uid->vendor) - 1); 704 EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 705 memcpy(uid->serial, private->ned->HDA_location, 706 sizeof(uid->serial) - 1); 707 EBCASC(uid->serial, sizeof(uid->serial) - 1); 708 uid->ssid = private->gneq->subsystemID; 709 uid->real_unit_addr = private->ned->unit_addr;; 710 if (private->sneq) { 711 uid->type = private->sneq->sua_flags; 712 if (uid->type == UA_BASE_PAV_ALIAS) 713 uid->base_unit_addr = private->sneq->base_unit_addr; 714 } else { 715 uid->type = UA_BASE_DEVICE; 716 } 717 if (private->vdsneq) { 718 for (count = 0; count < 16; count++) { 719 sprintf(uid->vduit+2*count, "%02x", 720 private->vdsneq->uit[count]); 721 } 722 } 723 return 0; 724 } 725 726 static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device, 727 void *rcd_buffer, 728 struct ciw *ciw, __u8 lpm) 729 { 730 struct dasd_ccw_req *cqr; 731 struct ccw1 *ccw; 732 733 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, ciw->count, 734 device); 735 736 if (IS_ERR(cqr)) { 737 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 738 "Could not allocate RCD request"); 739 return cqr; 740 } 741 742 ccw = cqr->cpaddr; 743 ccw->cmd_code = ciw->cmd; 744 ccw->cda = (__u32)(addr_t)rcd_buffer; 745 ccw->count = ciw->count; 746 747 cqr->startdev = device; 748 cqr->memdev = device; 749 cqr->block = NULL; 750 cqr->expires = 10*HZ; 751 cqr->lpm = lpm; 752 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 753 cqr->retries = 2; 754 cqr->buildclk = get_clock(); 755 cqr->status = DASD_CQR_FILLED; 756 return cqr; 757 } 758 759 static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 760 void **rcd_buffer, 761 int *rcd_buffer_size, __u8 lpm) 762 { 763 struct ciw *ciw; 764 char *rcd_buf = NULL; 765 int ret; 766 struct dasd_ccw_req *cqr; 767 768 /* 769 * scan for RCD command in extended SenseID data 770 */ 771 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 772 if (!ciw || ciw->cmd == 0) { 773 ret = -EOPNOTSUPP; 774 goto out_error; 775 } 776 rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA); 777 if (!rcd_buf) { 778 ret = -ENOMEM; 779 goto out_error; 780 } 781 782 /* 783 * buffer has to start with EBCDIC "V1.0" to show 784 * support for virtual device SNEQ 785 */ 786 rcd_buf[0] = 0xE5; 787 rcd_buf[1] = 0xF1; 788 rcd_buf[2] = 0x4B; 789 rcd_buf[3] = 0xF0; 790 cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm); 791 if (IS_ERR(cqr)) { 792 ret = PTR_ERR(cqr); 793 goto out_error; 794 } 795 ret = dasd_sleep_on(cqr); 796 /* 797 * on success we update the user input parms 798 */ 799 dasd_sfree_request(cqr, cqr->memdev); 800 if (ret) 801 goto out_error; 802 803 *rcd_buffer_size = ciw->count; 804 *rcd_buffer = rcd_buf; 805 return 0; 806 out_error: 807 kfree(rcd_buf); 808 *rcd_buffer = NULL; 809 *rcd_buffer_size = 0; 810 return ret; 811 } 812 813 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 814 { 815 816 struct dasd_sneq *sneq; 817 int i, count; 818 819 private->ned = NULL; 820 private->sneq = NULL; 821 private->vdsneq = NULL; 822 private->gneq = NULL; 823 count = private->conf_len / sizeof(struct dasd_sneq); 824 sneq = (struct dasd_sneq *)private->conf_data; 825 for (i = 0; i < count; ++i) { 826 if (sneq->flags.identifier == 1 && sneq->format == 1) 827 private->sneq = sneq; 828 else if (sneq->flags.identifier == 1 && sneq->format == 4) 829 private->vdsneq = (struct vd_sneq *)sneq; 830 else if (sneq->flags.identifier == 2) 831 private->gneq = (struct dasd_gneq *)sneq; 832 else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 833 private->ned = (struct dasd_ned *)sneq; 834 sneq++; 835 } 836 if (!private->ned || !private->gneq) { 837 private->ned = NULL; 838 private->sneq = NULL; 839 private->vdsneq = NULL; 840 private->gneq = NULL; 841 return -EINVAL; 842 } 843 return 0; 844 845 }; 846 847 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 848 { 849 struct dasd_gneq *gneq; 850 int i, count, found; 851 852 count = conf_len / sizeof(*gneq); 853 gneq = (struct dasd_gneq *)conf_data; 854 found = 0; 855 for (i = 0; i < count; ++i) { 856 if (gneq->flags.identifier == 2) { 857 found = 1; 858 break; 859 } 860 gneq++; 861 } 862 if (found) 863 return ((char *)gneq)[18] & 0x07; 864 else 865 return 0; 866 } 867 868 static int dasd_eckd_read_conf(struct dasd_device *device) 869 { 870 void *conf_data; 871 int conf_len, conf_data_saved; 872 int rc; 873 __u8 lpm; 874 struct dasd_eckd_private *private; 875 struct dasd_eckd_path *path_data; 876 877 private = (struct dasd_eckd_private *) device->private; 878 path_data = (struct dasd_eckd_path *) &private->path_data; 879 path_data->opm = ccw_device_get_path_mask(device->cdev); 880 lpm = 0x80; 881 conf_data_saved = 0; 882 /* get configuration data per operational path */ 883 for (lpm = 0x80; lpm; lpm>>= 1) { 884 if (lpm & path_data->opm){ 885 rc = dasd_eckd_read_conf_lpm(device, &conf_data, 886 &conf_len, lpm); 887 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 888 DBF_EVENT(DBF_WARNING, 889 "Read configuration data returned " 890 "error %d for device: %s", rc, 891 dev_name(&device->cdev->dev)); 892 return rc; 893 } 894 if (conf_data == NULL) { 895 DBF_EVENT(DBF_WARNING, "No configuration " 896 "data retrieved for device: %s", 897 dev_name(&device->cdev->dev)); 898 continue; /* no error */ 899 } 900 /* save first valid configuration data */ 901 if (!conf_data_saved) { 902 kfree(private->conf_data); 903 private->conf_data = conf_data; 904 private->conf_len = conf_len; 905 if (dasd_eckd_identify_conf_parts(private)) { 906 private->conf_data = NULL; 907 private->conf_len = 0; 908 kfree(conf_data); 909 continue; 910 } 911 conf_data_saved++; 912 } 913 switch (dasd_eckd_path_access(conf_data, conf_len)) { 914 case 0x02: 915 path_data->npm |= lpm; 916 break; 917 case 0x03: 918 path_data->ppm |= lpm; 919 break; 920 } 921 if (conf_data != private->conf_data) 922 kfree(conf_data); 923 } 924 } 925 return 0; 926 } 927 928 static int dasd_eckd_read_features(struct dasd_device *device) 929 { 930 struct dasd_psf_prssd_data *prssdp; 931 struct dasd_rssd_features *features; 932 struct dasd_ccw_req *cqr; 933 struct ccw1 *ccw; 934 int rc; 935 struct dasd_eckd_private *private; 936 937 private = (struct dasd_eckd_private *) device->private; 938 memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 939 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 940 (sizeof(struct dasd_psf_prssd_data) + 941 sizeof(struct dasd_rssd_features)), 942 device); 943 if (IS_ERR(cqr)) { 944 DBF_EVENT(DBF_WARNING, "Could not allocate initialization " 945 "request for device: %s", 946 dev_name(&device->cdev->dev)); 947 return PTR_ERR(cqr); 948 } 949 cqr->startdev = device; 950 cqr->memdev = device; 951 cqr->block = NULL; 952 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 953 cqr->retries = 5; 954 cqr->expires = 10 * HZ; 955 956 /* Prepare for Read Subsystem Data */ 957 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 958 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 959 prssdp->order = PSF_ORDER_PRSSD; 960 prssdp->suborder = 0x41; /* Read Feature Codes */ 961 /* all other bytes of prssdp must be zero */ 962 963 ccw = cqr->cpaddr; 964 ccw->cmd_code = DASD_ECKD_CCW_PSF; 965 ccw->count = sizeof(struct dasd_psf_prssd_data); 966 ccw->flags |= CCW_FLAG_CC; 967 ccw->cda = (__u32)(addr_t) prssdp; 968 969 /* Read Subsystem Data - feature codes */ 970 features = (struct dasd_rssd_features *) (prssdp + 1); 971 memset(features, 0, sizeof(struct dasd_rssd_features)); 972 973 ccw++; 974 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 975 ccw->count = sizeof(struct dasd_rssd_features); 976 ccw->cda = (__u32)(addr_t) features; 977 978 cqr->buildclk = get_clock(); 979 cqr->status = DASD_CQR_FILLED; 980 rc = dasd_sleep_on(cqr); 981 if (rc == 0) { 982 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 983 features = (struct dasd_rssd_features *) (prssdp + 1); 984 memcpy(&private->features, features, 985 sizeof(struct dasd_rssd_features)); 986 } else 987 dev_warn(&device->cdev->dev, "Reading device feature codes" 988 " failed with rc=%d\n", rc); 989 dasd_sfree_request(cqr, cqr->memdev); 990 return rc; 991 } 992 993 994 /* 995 * Build CP for Perform Subsystem Function - SSC. 996 */ 997 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 998 int enable_pav) 999 { 1000 struct dasd_ccw_req *cqr; 1001 struct dasd_psf_ssc_data *psf_ssc_data; 1002 struct ccw1 *ccw; 1003 1004 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 1005 sizeof(struct dasd_psf_ssc_data), 1006 device); 1007 1008 if (IS_ERR(cqr)) { 1009 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1010 "Could not allocate PSF-SSC request"); 1011 return cqr; 1012 } 1013 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 1014 psf_ssc_data->order = PSF_ORDER_SSC; 1015 psf_ssc_data->suborder = 0x40; 1016 if (enable_pav) { 1017 psf_ssc_data->suborder |= 0x88; 1018 psf_ssc_data->reserved[0] = 0x88; 1019 } 1020 ccw = cqr->cpaddr; 1021 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1022 ccw->cda = (__u32)(addr_t)psf_ssc_data; 1023 ccw->count = 66; 1024 1025 cqr->startdev = device; 1026 cqr->memdev = device; 1027 cqr->block = NULL; 1028 cqr->expires = 10*HZ; 1029 cqr->buildclk = get_clock(); 1030 cqr->status = DASD_CQR_FILLED; 1031 return cqr; 1032 } 1033 1034 /* 1035 * Perform Subsystem Function. 1036 * It is necessary to trigger CIO for channel revalidation since this 1037 * call might change behaviour of DASD devices. 1038 */ 1039 static int 1040 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav) 1041 { 1042 struct dasd_ccw_req *cqr; 1043 int rc; 1044 1045 cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 1046 if (IS_ERR(cqr)) 1047 return PTR_ERR(cqr); 1048 1049 rc = dasd_sleep_on(cqr); 1050 if (!rc) 1051 /* trigger CIO to reprobe devices */ 1052 css_schedule_reprobe(); 1053 dasd_sfree_request(cqr, cqr->memdev); 1054 return rc; 1055 } 1056 1057 /* 1058 * Valide storage server of current device. 1059 */ 1060 static int dasd_eckd_validate_server(struct dasd_device *device) 1061 { 1062 int rc; 1063 struct dasd_eckd_private *private; 1064 int enable_pav; 1065 1066 if (dasd_nopav || MACHINE_IS_VM) 1067 enable_pav = 0; 1068 else 1069 enable_pav = 1; 1070 rc = dasd_eckd_psf_ssc(device, enable_pav); 1071 /* may be requested feature is not available on server, 1072 * therefore just report error and go ahead */ 1073 private = (struct dasd_eckd_private *) device->private; 1074 DBF_EVENT(DBF_WARNING, "PSF-SSC on storage subsystem %s.%s.%04x " 1075 "returned rc=%d for device: %s", 1076 private->uid.vendor, private->uid.serial, 1077 private->uid.ssid, rc, dev_name(&device->cdev->dev)); 1078 /* RE-Read Configuration Data */ 1079 return dasd_eckd_read_conf(device); 1080 } 1081 1082 /* 1083 * Check device characteristics. 1084 * If the device is accessible using ECKD discipline, the device is enabled. 1085 */ 1086 static int 1087 dasd_eckd_check_characteristics(struct dasd_device *device) 1088 { 1089 struct dasd_eckd_private *private; 1090 struct dasd_block *block; 1091 int is_known, rc; 1092 1093 private = (struct dasd_eckd_private *) device->private; 1094 if (!private) { 1095 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 1096 if (!private) { 1097 dev_warn(&device->cdev->dev, 1098 "Allocating memory for private DASD data " 1099 "failed\n"); 1100 return -ENOMEM; 1101 } 1102 device->private = (void *) private; 1103 } else { 1104 memset(private, 0, sizeof(*private)); 1105 } 1106 /* Invalidate status of initial analysis. */ 1107 private->init_cqr_status = -1; 1108 /* Set default cache operations. */ 1109 private->attrib.operation = DASD_NORMAL_CACHE; 1110 private->attrib.nr_cyl = 0; 1111 1112 /* Read Configuration Data */ 1113 rc = dasd_eckd_read_conf(device); 1114 if (rc) 1115 goto out_err1; 1116 1117 /* Generate device unique id and register in devmap */ 1118 rc = dasd_eckd_generate_uid(device, &private->uid); 1119 if (rc) 1120 goto out_err1; 1121 dasd_set_uid(device->cdev, &private->uid); 1122 1123 if (private->uid.type == UA_BASE_DEVICE) { 1124 block = dasd_alloc_block(); 1125 if (IS_ERR(block)) { 1126 DBF_EVENT(DBF_WARNING, "could not allocate dasd " 1127 "block structure for device: %s", 1128 dev_name(&device->cdev->dev)); 1129 rc = PTR_ERR(block); 1130 goto out_err1; 1131 } 1132 device->block = block; 1133 block->base = device; 1134 } 1135 1136 /* register lcu with alias handling, enable PAV if this is a new lcu */ 1137 is_known = dasd_alias_make_device_known_to_lcu(device); 1138 if (is_known < 0) { 1139 rc = is_known; 1140 goto out_err2; 1141 } 1142 if (!is_known) { 1143 /* new lcu found */ 1144 rc = dasd_eckd_validate_server(device); /* will switch pav on */ 1145 if (rc) 1146 goto out_err3; 1147 } 1148 1149 /* Read Feature Codes */ 1150 dasd_eckd_read_features(device); 1151 1152 /* Read Device Characteristics */ 1153 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 1154 &private->rdc_data, 64); 1155 if (rc) { 1156 DBF_EVENT(DBF_WARNING, 1157 "Read device characteristics failed, rc=%d for " 1158 "device: %s", rc, dev_name(&device->cdev->dev)); 1159 goto out_err3; 1160 } 1161 /* find the vaild cylinder size */ 1162 if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1163 private->rdc_data.long_no_cyl) 1164 private->real_cyl = private->rdc_data.long_no_cyl; 1165 else 1166 private->real_cyl = private->rdc_data.no_cyl; 1167 1168 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 1169 "with %d cylinders, %d heads, %d sectors\n", 1170 private->rdc_data.dev_type, 1171 private->rdc_data.dev_model, 1172 private->rdc_data.cu_type, 1173 private->rdc_data.cu_model.model, 1174 private->real_cyl, 1175 private->rdc_data.trk_per_cyl, 1176 private->rdc_data.sec_per_trk); 1177 return 0; 1178 1179 out_err3: 1180 dasd_alias_disconnect_device_from_lcu(device); 1181 out_err2: 1182 dasd_free_block(device->block); 1183 device->block = NULL; 1184 out_err1: 1185 kfree(private->conf_data); 1186 kfree(device->private); 1187 device->private = NULL; 1188 return rc; 1189 } 1190 1191 static void dasd_eckd_uncheck_device(struct dasd_device *device) 1192 { 1193 struct dasd_eckd_private *private; 1194 1195 private = (struct dasd_eckd_private *) device->private; 1196 dasd_alias_disconnect_device_from_lcu(device); 1197 private->ned = NULL; 1198 private->sneq = NULL; 1199 private->vdsneq = NULL; 1200 private->gneq = NULL; 1201 private->conf_len = 0; 1202 kfree(private->conf_data); 1203 private->conf_data = NULL; 1204 } 1205 1206 static struct dasd_ccw_req * 1207 dasd_eckd_analysis_ccw(struct dasd_device *device) 1208 { 1209 struct dasd_eckd_private *private; 1210 struct eckd_count *count_data; 1211 struct LO_eckd_data *LO_data; 1212 struct dasd_ccw_req *cqr; 1213 struct ccw1 *ccw; 1214 int cplength, datasize; 1215 int i; 1216 1217 private = (struct dasd_eckd_private *) device->private; 1218 1219 cplength = 8; 1220 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 1221 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 1222 if (IS_ERR(cqr)) 1223 return cqr; 1224 ccw = cqr->cpaddr; 1225 /* Define extent for the first 3 tracks. */ 1226 define_extent(ccw++, cqr->data, 0, 2, 1227 DASD_ECKD_CCW_READ_COUNT, device); 1228 LO_data = cqr->data + sizeof(struct DE_eckd_data); 1229 /* Locate record for the first 4 records on track 0. */ 1230 ccw[-1].flags |= CCW_FLAG_CC; 1231 locate_record(ccw++, LO_data++, 0, 0, 4, 1232 DASD_ECKD_CCW_READ_COUNT, device, 0); 1233 1234 count_data = private->count_area; 1235 for (i = 0; i < 4; i++) { 1236 ccw[-1].flags |= CCW_FLAG_CC; 1237 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1238 ccw->flags = 0; 1239 ccw->count = 8; 1240 ccw->cda = (__u32)(addr_t) count_data; 1241 ccw++; 1242 count_data++; 1243 } 1244 1245 /* Locate record for the first record on track 2. */ 1246 ccw[-1].flags |= CCW_FLAG_CC; 1247 locate_record(ccw++, LO_data++, 2, 0, 1, 1248 DASD_ECKD_CCW_READ_COUNT, device, 0); 1249 /* Read count ccw. */ 1250 ccw[-1].flags |= CCW_FLAG_CC; 1251 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1252 ccw->flags = 0; 1253 ccw->count = 8; 1254 ccw->cda = (__u32)(addr_t) count_data; 1255 1256 cqr->block = NULL; 1257 cqr->startdev = device; 1258 cqr->memdev = device; 1259 cqr->retries = 0; 1260 cqr->buildclk = get_clock(); 1261 cqr->status = DASD_CQR_FILLED; 1262 return cqr; 1263 } 1264 1265 /* 1266 * This is the callback function for the init_analysis cqr. It saves 1267 * the status of the initial analysis ccw before it frees it and kicks 1268 * the device to continue the startup sequence. This will call 1269 * dasd_eckd_do_analysis again (if the devices has not been marked 1270 * for deletion in the meantime). 1271 */ 1272 static void 1273 dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) 1274 { 1275 struct dasd_eckd_private *private; 1276 struct dasd_device *device; 1277 1278 device = init_cqr->startdev; 1279 private = (struct dasd_eckd_private *) device->private; 1280 private->init_cqr_status = init_cqr->status; 1281 dasd_sfree_request(init_cqr, device); 1282 dasd_kick_device(device); 1283 } 1284 1285 static int 1286 dasd_eckd_start_analysis(struct dasd_block *block) 1287 { 1288 struct dasd_eckd_private *private; 1289 struct dasd_ccw_req *init_cqr; 1290 1291 private = (struct dasd_eckd_private *) block->base->private; 1292 init_cqr = dasd_eckd_analysis_ccw(block->base); 1293 if (IS_ERR(init_cqr)) 1294 return PTR_ERR(init_cqr); 1295 init_cqr->callback = dasd_eckd_analysis_callback; 1296 init_cqr->callback_data = NULL; 1297 init_cqr->expires = 5*HZ; 1298 dasd_add_request_head(init_cqr); 1299 return -EAGAIN; 1300 } 1301 1302 static int 1303 dasd_eckd_end_analysis(struct dasd_block *block) 1304 { 1305 struct dasd_device *device; 1306 struct dasd_eckd_private *private; 1307 struct eckd_count *count_area; 1308 unsigned int sb, blk_per_trk; 1309 int status, i; 1310 1311 device = block->base; 1312 private = (struct dasd_eckd_private *) device->private; 1313 status = private->init_cqr_status; 1314 private->init_cqr_status = -1; 1315 if (status != DASD_CQR_DONE) { 1316 dev_warn(&device->cdev->dev, 1317 "The DASD is not formatted\n"); 1318 return -EMEDIUMTYPE; 1319 } 1320 1321 private->uses_cdl = 1; 1322 /* Check Track 0 for Compatible Disk Layout */ 1323 count_area = NULL; 1324 for (i = 0; i < 3; i++) { 1325 if (private->count_area[i].kl != 4 || 1326 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 1327 private->uses_cdl = 0; 1328 break; 1329 } 1330 } 1331 if (i == 3) 1332 count_area = &private->count_area[4]; 1333 1334 if (private->uses_cdl == 0) { 1335 for (i = 0; i < 5; i++) { 1336 if ((private->count_area[i].kl != 0) || 1337 (private->count_area[i].dl != 1338 private->count_area[0].dl)) 1339 break; 1340 } 1341 if (i == 5) 1342 count_area = &private->count_area[0]; 1343 } else { 1344 if (private->count_area[3].record == 1) 1345 dev_warn(&device->cdev->dev, 1346 "Track 0 has no records following the VTOC\n"); 1347 } 1348 if (count_area != NULL && count_area->kl == 0) { 1349 /* we found notthing violating our disk layout */ 1350 if (dasd_check_blocksize(count_area->dl) == 0) 1351 block->bp_block = count_area->dl; 1352 } 1353 if (block->bp_block == 0) { 1354 dev_warn(&device->cdev->dev, 1355 "The disk layout of the DASD is not supported\n"); 1356 return -EMEDIUMTYPE; 1357 } 1358 block->s2b_shift = 0; /* bits to shift 512 to get a block */ 1359 for (sb = 512; sb < block->bp_block; sb = sb << 1) 1360 block->s2b_shift++; 1361 1362 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1363 block->blocks = (private->real_cyl * 1364 private->rdc_data.trk_per_cyl * 1365 blk_per_trk); 1366 1367 dev_info(&device->cdev->dev, 1368 "DASD with %d KB/block, %d KB total size, %d KB/track, " 1369 "%s\n", (block->bp_block >> 10), 1370 ((private->real_cyl * 1371 private->rdc_data.trk_per_cyl * 1372 blk_per_trk * (block->bp_block >> 9)) >> 1), 1373 ((blk_per_trk * block->bp_block) >> 10), 1374 private->uses_cdl ? 1375 "compatible disk layout" : "linux disk layout"); 1376 1377 return 0; 1378 } 1379 1380 static int dasd_eckd_do_analysis(struct dasd_block *block) 1381 { 1382 struct dasd_eckd_private *private; 1383 1384 private = (struct dasd_eckd_private *) block->base->private; 1385 if (private->init_cqr_status < 0) 1386 return dasd_eckd_start_analysis(block); 1387 else 1388 return dasd_eckd_end_analysis(block); 1389 } 1390 1391 static int dasd_eckd_ready_to_online(struct dasd_device *device) 1392 { 1393 return dasd_alias_add_device(device); 1394 }; 1395 1396 static int dasd_eckd_online_to_ready(struct dasd_device *device) 1397 { 1398 return dasd_alias_remove_device(device); 1399 }; 1400 1401 static int 1402 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 1403 { 1404 struct dasd_eckd_private *private; 1405 1406 private = (struct dasd_eckd_private *) block->base->private; 1407 if (dasd_check_blocksize(block->bp_block) == 0) { 1408 geo->sectors = recs_per_track(&private->rdc_data, 1409 0, block->bp_block); 1410 } 1411 geo->cylinders = private->rdc_data.no_cyl; 1412 geo->heads = private->rdc_data.trk_per_cyl; 1413 return 0; 1414 } 1415 1416 static struct dasd_ccw_req * 1417 dasd_eckd_format_device(struct dasd_device * device, 1418 struct format_data_t * fdata) 1419 { 1420 struct dasd_eckd_private *private; 1421 struct dasd_ccw_req *fcp; 1422 struct eckd_count *ect; 1423 struct ccw1 *ccw; 1424 void *data; 1425 int rpt; 1426 struct ch_t address; 1427 int cplength, datasize; 1428 int i; 1429 int intensity = 0; 1430 int r0_perm; 1431 1432 private = (struct dasd_eckd_private *) device->private; 1433 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 1434 set_ch_t(&address, 1435 fdata->start_unit / private->rdc_data.trk_per_cyl, 1436 fdata->start_unit % private->rdc_data.trk_per_cyl); 1437 1438 /* Sanity checks. */ 1439 if (fdata->start_unit >= 1440 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 1441 dev_warn(&device->cdev->dev, "Start track number %d used in " 1442 "formatting is too big\n", fdata->start_unit); 1443 return ERR_PTR(-EINVAL); 1444 } 1445 if (fdata->start_unit > fdata->stop_unit) { 1446 dev_warn(&device->cdev->dev, "Start track %d used in " 1447 "formatting exceeds end track\n", fdata->start_unit); 1448 return ERR_PTR(-EINVAL); 1449 } 1450 if (dasd_check_blocksize(fdata->blksize) != 0) { 1451 dev_warn(&device->cdev->dev, 1452 "The DASD cannot be formatted with block size %d\n", 1453 fdata->blksize); 1454 return ERR_PTR(-EINVAL); 1455 } 1456 1457 /* 1458 * fdata->intensity is a bit string that tells us what to do: 1459 * Bit 0: write record zero 1460 * Bit 1: write home address, currently not supported 1461 * Bit 2: invalidate tracks 1462 * Bit 3: use OS/390 compatible disk layout (cdl) 1463 * Bit 4: do not allow storage subsystem to modify record zero 1464 * Only some bit combinations do make sense. 1465 */ 1466 if (fdata->intensity & 0x10) { 1467 r0_perm = 0; 1468 intensity = fdata->intensity & ~0x10; 1469 } else { 1470 r0_perm = 1; 1471 intensity = fdata->intensity; 1472 } 1473 switch (intensity) { 1474 case 0x00: /* Normal format */ 1475 case 0x08: /* Normal format, use cdl. */ 1476 cplength = 2 + rpt; 1477 datasize = sizeof(struct DE_eckd_data) + 1478 sizeof(struct LO_eckd_data) + 1479 rpt * sizeof(struct eckd_count); 1480 break; 1481 case 0x01: /* Write record zero and format track. */ 1482 case 0x09: /* Write record zero and format track, use cdl. */ 1483 cplength = 3 + rpt; 1484 datasize = sizeof(struct DE_eckd_data) + 1485 sizeof(struct LO_eckd_data) + 1486 sizeof(struct eckd_count) + 1487 rpt * sizeof(struct eckd_count); 1488 break; 1489 case 0x04: /* Invalidate track. */ 1490 case 0x0c: /* Invalidate track, use cdl. */ 1491 cplength = 3; 1492 datasize = sizeof(struct DE_eckd_data) + 1493 sizeof(struct LO_eckd_data) + 1494 sizeof(struct eckd_count); 1495 break; 1496 default: 1497 dev_warn(&device->cdev->dev, "An I/O control call used " 1498 "incorrect flags 0x%x\n", fdata->intensity); 1499 return ERR_PTR(-EINVAL); 1500 } 1501 /* Allocate the format ccw request. */ 1502 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 1503 if (IS_ERR(fcp)) 1504 return fcp; 1505 1506 data = fcp->data; 1507 ccw = fcp->cpaddr; 1508 1509 switch (intensity & ~0x08) { 1510 case 0x00: /* Normal format. */ 1511 define_extent(ccw++, (struct DE_eckd_data *) data, 1512 fdata->start_unit, fdata->start_unit, 1513 DASD_ECKD_CCW_WRITE_CKD, device); 1514 /* grant subsystem permission to format R0 */ 1515 if (r0_perm) 1516 ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 1517 data += sizeof(struct DE_eckd_data); 1518 ccw[-1].flags |= CCW_FLAG_CC; 1519 locate_record(ccw++, (struct LO_eckd_data *) data, 1520 fdata->start_unit, 0, rpt, 1521 DASD_ECKD_CCW_WRITE_CKD, device, 1522 fdata->blksize); 1523 data += sizeof(struct LO_eckd_data); 1524 break; 1525 case 0x01: /* Write record zero + format track. */ 1526 define_extent(ccw++, (struct DE_eckd_data *) data, 1527 fdata->start_unit, fdata->start_unit, 1528 DASD_ECKD_CCW_WRITE_RECORD_ZERO, 1529 device); 1530 data += sizeof(struct DE_eckd_data); 1531 ccw[-1].flags |= CCW_FLAG_CC; 1532 locate_record(ccw++, (struct LO_eckd_data *) data, 1533 fdata->start_unit, 0, rpt + 1, 1534 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 1535 device->block->bp_block); 1536 data += sizeof(struct LO_eckd_data); 1537 break; 1538 case 0x04: /* Invalidate track. */ 1539 define_extent(ccw++, (struct DE_eckd_data *) data, 1540 fdata->start_unit, fdata->start_unit, 1541 DASD_ECKD_CCW_WRITE_CKD, device); 1542 data += sizeof(struct DE_eckd_data); 1543 ccw[-1].flags |= CCW_FLAG_CC; 1544 locate_record(ccw++, (struct LO_eckd_data *) data, 1545 fdata->start_unit, 0, 1, 1546 DASD_ECKD_CCW_WRITE_CKD, device, 8); 1547 data += sizeof(struct LO_eckd_data); 1548 break; 1549 } 1550 if (intensity & 0x01) { /* write record zero */ 1551 ect = (struct eckd_count *) data; 1552 data += sizeof(struct eckd_count); 1553 ect->cyl = address.cyl; 1554 ect->head = address.head; 1555 ect->record = 0; 1556 ect->kl = 0; 1557 ect->dl = 8; 1558 ccw[-1].flags |= CCW_FLAG_CC; 1559 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 1560 ccw->flags = CCW_FLAG_SLI; 1561 ccw->count = 8; 1562 ccw->cda = (__u32)(addr_t) ect; 1563 ccw++; 1564 } 1565 if ((intensity & ~0x08) & 0x04) { /* erase track */ 1566 ect = (struct eckd_count *) data; 1567 data += sizeof(struct eckd_count); 1568 ect->cyl = address.cyl; 1569 ect->head = address.head; 1570 ect->record = 1; 1571 ect->kl = 0; 1572 ect->dl = 0; 1573 ccw[-1].flags |= CCW_FLAG_CC; 1574 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 1575 ccw->flags = CCW_FLAG_SLI; 1576 ccw->count = 8; 1577 ccw->cda = (__u32)(addr_t) ect; 1578 } else { /* write remaining records */ 1579 for (i = 0; i < rpt; i++) { 1580 ect = (struct eckd_count *) data; 1581 data += sizeof(struct eckd_count); 1582 ect->cyl = address.cyl; 1583 ect->head = address.head; 1584 ect->record = i + 1; 1585 ect->kl = 0; 1586 ect->dl = fdata->blksize; 1587 /* Check for special tracks 0-1 when formatting CDL */ 1588 if ((intensity & 0x08) && 1589 fdata->start_unit == 0) { 1590 if (i < 3) { 1591 ect->kl = 4; 1592 ect->dl = sizes_trk0[i] - 4; 1593 } 1594 } 1595 if ((intensity & 0x08) && 1596 fdata->start_unit == 1) { 1597 ect->kl = 44; 1598 ect->dl = LABEL_SIZE - 44; 1599 } 1600 ccw[-1].flags |= CCW_FLAG_CC; 1601 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 1602 ccw->flags = CCW_FLAG_SLI; 1603 ccw->count = 8; 1604 ccw->cda = (__u32)(addr_t) ect; 1605 ccw++; 1606 } 1607 } 1608 fcp->startdev = device; 1609 fcp->memdev = device; 1610 clear_bit(DASD_CQR_FLAGS_USE_ERP, &fcp->flags); 1611 fcp->retries = 5; /* set retry counter to enable default ERP */ 1612 fcp->buildclk = get_clock(); 1613 fcp->status = DASD_CQR_FILLED; 1614 return fcp; 1615 } 1616 1617 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 1618 { 1619 cqr->status = DASD_CQR_FILLED; 1620 if (cqr->block && (cqr->startdev != cqr->block->base)) { 1621 dasd_eckd_reset_ccw_to_base_io(cqr); 1622 cqr->startdev = cqr->block->base; 1623 } 1624 }; 1625 1626 static dasd_erp_fn_t 1627 dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 1628 { 1629 struct dasd_device *device = (struct dasd_device *) cqr->startdev; 1630 struct ccw_device *cdev = device->cdev; 1631 1632 switch (cdev->id.cu_type) { 1633 case 0x3990: 1634 case 0x2105: 1635 case 0x2107: 1636 case 0x1750: 1637 return dasd_3990_erp_action; 1638 case 0x9343: 1639 case 0x3880: 1640 default: 1641 return dasd_default_erp_action; 1642 } 1643 } 1644 1645 static dasd_erp_fn_t 1646 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 1647 { 1648 return dasd_default_erp_postaction; 1649 } 1650 1651 1652 static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device, 1653 struct irb *irb) 1654 { 1655 char mask; 1656 char *sense = NULL; 1657 1658 /* first of all check for state change pending interrupt */ 1659 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 1660 if ((scsw_dstat(&irb->scsw) & mask) == mask) { 1661 dasd_generic_handle_state_change(device); 1662 return; 1663 } 1664 1665 /* summary unit check */ 1666 if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 1667 (irb->ecw[7] == 0x0D)) { 1668 dasd_alias_handle_summary_unit_check(device, irb); 1669 return; 1670 } 1671 1672 sense = dasd_get_sense(irb); 1673 /* service information message SIM */ 1674 if (sense && !(sense[27] & DASD_SENSE_BIT_0) && 1675 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 1676 dasd_3990_erp_handle_sim(device, sense); 1677 dasd_schedule_device_bh(device); 1678 return; 1679 } 1680 1681 if ((scsw_cc(&irb->scsw) == 1) && 1682 (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) && 1683 (scsw_actl(&irb->scsw) & SCSW_ACTL_START_PEND) && 1684 (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) { 1685 /* fake irb do nothing, they are handled elsewhere */ 1686 dasd_schedule_device_bh(device); 1687 return; 1688 } 1689 1690 if (!sense) { 1691 /* just report other unsolicited interrupts */ 1692 DBF_DEV_EVENT(DBF_ERR, device, "%s", 1693 "unsolicited interrupt received"); 1694 } else { 1695 DBF_DEV_EVENT(DBF_ERR, device, "%s", 1696 "unsolicited interrupt received " 1697 "(sense available)"); 1698 device->discipline->dump_sense_dbf(device, irb, "unsolicited"); 1699 } 1700 1701 dasd_schedule_device_bh(device); 1702 return; 1703 }; 1704 1705 1706 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 1707 struct dasd_device *startdev, 1708 struct dasd_block *block, 1709 struct request *req, 1710 sector_t first_rec, 1711 sector_t last_rec, 1712 sector_t first_trk, 1713 sector_t last_trk, 1714 unsigned int first_offs, 1715 unsigned int last_offs, 1716 unsigned int blk_per_trk, 1717 unsigned int blksize) 1718 { 1719 struct dasd_eckd_private *private; 1720 unsigned long *idaws; 1721 struct LO_eckd_data *LO_data; 1722 struct dasd_ccw_req *cqr; 1723 struct ccw1 *ccw; 1724 struct req_iterator iter; 1725 struct bio_vec *bv; 1726 char *dst; 1727 unsigned int off; 1728 int count, cidaw, cplength, datasize; 1729 sector_t recid; 1730 unsigned char cmd, rcmd; 1731 int use_prefix; 1732 struct dasd_device *basedev; 1733 1734 basedev = block->base; 1735 private = (struct dasd_eckd_private *) basedev->private; 1736 if (rq_data_dir(req) == READ) 1737 cmd = DASD_ECKD_CCW_READ_MT; 1738 else if (rq_data_dir(req) == WRITE) 1739 cmd = DASD_ECKD_CCW_WRITE_MT; 1740 else 1741 return ERR_PTR(-EINVAL); 1742 1743 /* Check struct bio and count the number of blocks for the request. */ 1744 count = 0; 1745 cidaw = 0; 1746 rq_for_each_segment(bv, req, iter) { 1747 if (bv->bv_len & (blksize - 1)) 1748 /* Eckd can only do full blocks. */ 1749 return ERR_PTR(-EINVAL); 1750 count += bv->bv_len >> (block->s2b_shift + 9); 1751 #if defined(CONFIG_64BIT) 1752 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 1753 cidaw += bv->bv_len >> (block->s2b_shift + 9); 1754 #endif 1755 } 1756 /* Paranoia. */ 1757 if (count != last_rec - first_rec + 1) 1758 return ERR_PTR(-EINVAL); 1759 1760 /* use the prefix command if available */ 1761 use_prefix = private->features.feature[8] & 0x01; 1762 if (use_prefix) { 1763 /* 1x prefix + number of blocks */ 1764 cplength = 2 + count; 1765 /* 1x prefix + cidaws*sizeof(long) */ 1766 datasize = sizeof(struct PFX_eckd_data) + 1767 sizeof(struct LO_eckd_data) + 1768 cidaw * sizeof(unsigned long); 1769 } else { 1770 /* 1x define extent + 1x locate record + number of blocks */ 1771 cplength = 2 + count; 1772 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 1773 datasize = sizeof(struct DE_eckd_data) + 1774 sizeof(struct LO_eckd_data) + 1775 cidaw * sizeof(unsigned long); 1776 } 1777 /* Find out the number of additional locate record ccws for cdl. */ 1778 if (private->uses_cdl && first_rec < 2*blk_per_trk) { 1779 if (last_rec >= 2*blk_per_trk) 1780 count = 2*blk_per_trk - first_rec; 1781 cplength += count; 1782 datasize += count*sizeof(struct LO_eckd_data); 1783 } 1784 /* Allocate the ccw request. */ 1785 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 1786 startdev); 1787 if (IS_ERR(cqr)) 1788 return cqr; 1789 ccw = cqr->cpaddr; 1790 /* First ccw is define extent or prefix. */ 1791 if (use_prefix) { 1792 if (prefix(ccw++, cqr->data, first_trk, 1793 last_trk, cmd, basedev, startdev) == -EAGAIN) { 1794 /* Clock not in sync and XRC is enabled. 1795 * Try again later. 1796 */ 1797 dasd_sfree_request(cqr, startdev); 1798 return ERR_PTR(-EAGAIN); 1799 } 1800 idaws = (unsigned long *) (cqr->data + 1801 sizeof(struct PFX_eckd_data)); 1802 } else { 1803 if (define_extent(ccw++, cqr->data, first_trk, 1804 last_trk, cmd, startdev) == -EAGAIN) { 1805 /* Clock not in sync and XRC is enabled. 1806 * Try again later. 1807 */ 1808 dasd_sfree_request(cqr, startdev); 1809 return ERR_PTR(-EAGAIN); 1810 } 1811 idaws = (unsigned long *) (cqr->data + 1812 sizeof(struct DE_eckd_data)); 1813 } 1814 /* Build locate_record+read/write/ccws. */ 1815 LO_data = (struct LO_eckd_data *) (idaws + cidaw); 1816 recid = first_rec; 1817 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 1818 /* Only standard blocks so there is just one locate record. */ 1819 ccw[-1].flags |= CCW_FLAG_CC; 1820 locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 1821 last_rec - recid + 1, cmd, basedev, blksize); 1822 } 1823 rq_for_each_segment(bv, req, iter) { 1824 dst = page_address(bv->bv_page) + bv->bv_offset; 1825 if (dasd_page_cache) { 1826 char *copy = kmem_cache_alloc(dasd_page_cache, 1827 GFP_DMA | __GFP_NOWARN); 1828 if (copy && rq_data_dir(req) == WRITE) 1829 memcpy(copy + bv->bv_offset, dst, bv->bv_len); 1830 if (copy) 1831 dst = copy + bv->bv_offset; 1832 } 1833 for (off = 0; off < bv->bv_len; off += blksize) { 1834 sector_t trkid = recid; 1835 unsigned int recoffs = sector_div(trkid, blk_per_trk); 1836 rcmd = cmd; 1837 count = blksize; 1838 /* Locate record for cdl special block ? */ 1839 if (private->uses_cdl && recid < 2*blk_per_trk) { 1840 if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 1841 rcmd |= 0x8; 1842 count = dasd_eckd_cdl_reclen(recid); 1843 if (count < blksize && 1844 rq_data_dir(req) == READ) 1845 memset(dst + count, 0xe5, 1846 blksize - count); 1847 } 1848 ccw[-1].flags |= CCW_FLAG_CC; 1849 locate_record(ccw++, LO_data++, 1850 trkid, recoffs + 1, 1851 1, rcmd, basedev, count); 1852 } 1853 /* Locate record for standard blocks ? */ 1854 if (private->uses_cdl && recid == 2*blk_per_trk) { 1855 ccw[-1].flags |= CCW_FLAG_CC; 1856 locate_record(ccw++, LO_data++, 1857 trkid, recoffs + 1, 1858 last_rec - recid + 1, 1859 cmd, basedev, count); 1860 } 1861 /* Read/write ccw. */ 1862 ccw[-1].flags |= CCW_FLAG_CC; 1863 ccw->cmd_code = rcmd; 1864 ccw->count = count; 1865 if (idal_is_needed(dst, blksize)) { 1866 ccw->cda = (__u32)(addr_t) idaws; 1867 ccw->flags = CCW_FLAG_IDA; 1868 idaws = idal_create_words(idaws, dst, blksize); 1869 } else { 1870 ccw->cda = (__u32)(addr_t) dst; 1871 ccw->flags = 0; 1872 } 1873 ccw++; 1874 dst += blksize; 1875 recid++; 1876 } 1877 } 1878 if (blk_noretry_request(req) || 1879 block->base->features & DASD_FEATURE_FAILFAST) 1880 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1881 cqr->startdev = startdev; 1882 cqr->memdev = startdev; 1883 cqr->block = block; 1884 cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 1885 cqr->lpm = private->path_data.ppm; 1886 cqr->retries = 256; 1887 cqr->buildclk = get_clock(); 1888 cqr->status = DASD_CQR_FILLED; 1889 return cqr; 1890 } 1891 1892 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 1893 struct dasd_device *startdev, 1894 struct dasd_block *block, 1895 struct request *req, 1896 sector_t first_rec, 1897 sector_t last_rec, 1898 sector_t first_trk, 1899 sector_t last_trk, 1900 unsigned int first_offs, 1901 unsigned int last_offs, 1902 unsigned int blk_per_trk, 1903 unsigned int blksize) 1904 { 1905 struct dasd_eckd_private *private; 1906 unsigned long *idaws; 1907 struct dasd_ccw_req *cqr; 1908 struct ccw1 *ccw; 1909 struct req_iterator iter; 1910 struct bio_vec *bv; 1911 char *dst, *idaw_dst; 1912 unsigned int cidaw, cplength, datasize; 1913 unsigned int tlf; 1914 sector_t recid; 1915 unsigned char cmd; 1916 struct dasd_device *basedev; 1917 unsigned int trkcount, count, count_to_trk_end; 1918 unsigned int idaw_len, seg_len, part_len, len_to_track_end; 1919 unsigned char new_track, end_idaw; 1920 sector_t trkid; 1921 unsigned int recoffs; 1922 1923 basedev = block->base; 1924 private = (struct dasd_eckd_private *) basedev->private; 1925 if (rq_data_dir(req) == READ) 1926 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 1927 else if (rq_data_dir(req) == WRITE) 1928 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 1929 else 1930 return ERR_PTR(-EINVAL); 1931 1932 /* Track based I/O needs IDAWs for each page, and not just for 1933 * 64 bit addresses. We need additional idals for pages 1934 * that get filled from two tracks, so we use the number 1935 * of records as upper limit. 1936 */ 1937 cidaw = last_rec - first_rec + 1; 1938 trkcount = last_trk - first_trk + 1; 1939 1940 /* 1x prefix + one read/write ccw per track */ 1941 cplength = 1 + trkcount; 1942 1943 /* on 31-bit we need space for two 32 bit addresses per page 1944 * on 64-bit one 64 bit address 1945 */ 1946 datasize = sizeof(struct PFX_eckd_data) + 1947 cidaw * sizeof(unsigned long long); 1948 1949 /* Allocate the ccw request. */ 1950 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 1951 startdev); 1952 if (IS_ERR(cqr)) 1953 return cqr; 1954 ccw = cqr->cpaddr; 1955 /* transfer length factor: how many bytes to read from the last track */ 1956 if (first_trk == last_trk) 1957 tlf = last_offs - first_offs + 1; 1958 else 1959 tlf = last_offs + 1; 1960 tlf *= blksize; 1961 1962 if (prefix_LRE(ccw++, cqr->data, first_trk, 1963 last_trk, cmd, basedev, startdev, 1964 1 /* format */, first_offs + 1, 1965 trkcount, blksize, 1966 tlf) == -EAGAIN) { 1967 /* Clock not in sync and XRC is enabled. 1968 * Try again later. 1969 */ 1970 dasd_sfree_request(cqr, startdev); 1971 return ERR_PTR(-EAGAIN); 1972 } 1973 1974 /* 1975 * The translation of request into ccw programs must meet the 1976 * following conditions: 1977 * - all idaws but the first and the last must address full pages 1978 * (or 2K blocks on 31-bit) 1979 * - the scope of a ccw and it's idal ends with the track boundaries 1980 */ 1981 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 1982 recid = first_rec; 1983 new_track = 1; 1984 end_idaw = 0; 1985 len_to_track_end = 0; 1986 idaw_dst = 0; 1987 idaw_len = 0; 1988 rq_for_each_segment(bv, req, iter) { 1989 dst = page_address(bv->bv_page) + bv->bv_offset; 1990 seg_len = bv->bv_len; 1991 while (seg_len) { 1992 if (new_track) { 1993 trkid = recid; 1994 recoffs = sector_div(trkid, blk_per_trk); 1995 count_to_trk_end = blk_per_trk - recoffs; 1996 count = min((last_rec - recid + 1), 1997 (sector_t)count_to_trk_end); 1998 len_to_track_end = count * blksize; 1999 ccw[-1].flags |= CCW_FLAG_CC; 2000 ccw->cmd_code = cmd; 2001 ccw->count = len_to_track_end; 2002 ccw->cda = (__u32)(addr_t)idaws; 2003 ccw->flags = CCW_FLAG_IDA; 2004 ccw++; 2005 recid += count; 2006 new_track = 0; 2007 /* first idaw for a ccw may start anywhere */ 2008 if (!idaw_dst) 2009 idaw_dst = dst; 2010 } 2011 /* If we start a new idaw, we must make sure that it 2012 * starts on an IDA_BLOCK_SIZE boundary. 2013 * If we continue an idaw, we must make sure that the 2014 * current segment begins where the so far accumulated 2015 * idaw ends 2016 */ 2017 if (!idaw_dst) { 2018 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 2019 dasd_sfree_request(cqr, startdev); 2020 return ERR_PTR(-ERANGE); 2021 } else 2022 idaw_dst = dst; 2023 } 2024 if ((idaw_dst + idaw_len) != dst) { 2025 dasd_sfree_request(cqr, startdev); 2026 return ERR_PTR(-ERANGE); 2027 } 2028 part_len = min(seg_len, len_to_track_end); 2029 seg_len -= part_len; 2030 dst += part_len; 2031 idaw_len += part_len; 2032 len_to_track_end -= part_len; 2033 /* collected memory area ends on an IDA_BLOCK border, 2034 * -> create an idaw 2035 * idal_create_words will handle cases where idaw_len 2036 * is larger then IDA_BLOCK_SIZE 2037 */ 2038 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2039 end_idaw = 1; 2040 /* We also need to end the idaw at track end */ 2041 if (!len_to_track_end) { 2042 new_track = 1; 2043 end_idaw = 1; 2044 } 2045 if (end_idaw) { 2046 idaws = idal_create_words(idaws, idaw_dst, 2047 idaw_len); 2048 idaw_dst = 0; 2049 idaw_len = 0; 2050 end_idaw = 0; 2051 } 2052 } 2053 } 2054 2055 if (blk_noretry_request(req) || 2056 block->base->features & DASD_FEATURE_FAILFAST) 2057 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2058 cqr->startdev = startdev; 2059 cqr->memdev = startdev; 2060 cqr->block = block; 2061 cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 2062 cqr->lpm = private->path_data.ppm; 2063 cqr->retries = 256; 2064 cqr->buildclk = get_clock(); 2065 cqr->status = DASD_CQR_FILLED; 2066 return cqr; 2067 } 2068 2069 static int prepare_itcw(struct itcw *itcw, 2070 unsigned int trk, unsigned int totrk, int cmd, 2071 struct dasd_device *basedev, 2072 struct dasd_device *startdev, 2073 unsigned int rec_on_trk, int count, 2074 unsigned int blksize, 2075 unsigned int total_data_size, 2076 unsigned int tlf, 2077 unsigned int blk_per_trk) 2078 { 2079 struct PFX_eckd_data pfxdata; 2080 struct dasd_eckd_private *basepriv, *startpriv; 2081 struct DE_eckd_data *dedata; 2082 struct LRE_eckd_data *lredata; 2083 struct dcw *dcw; 2084 2085 u32 begcyl, endcyl; 2086 u16 heads, beghead, endhead; 2087 u8 pfx_cmd; 2088 2089 int rc = 0; 2090 int sector = 0; 2091 int dn, d; 2092 2093 2094 /* setup prefix data */ 2095 basepriv = (struct dasd_eckd_private *) basedev->private; 2096 startpriv = (struct dasd_eckd_private *) startdev->private; 2097 dedata = &pfxdata.define_extent; 2098 lredata = &pfxdata.locate_record; 2099 2100 memset(&pfxdata, 0, sizeof(pfxdata)); 2101 pfxdata.format = 1; /* PFX with LRE */ 2102 pfxdata.base_address = basepriv->ned->unit_addr; 2103 pfxdata.base_lss = basepriv->ned->ID; 2104 pfxdata.validity.define_extent = 1; 2105 2106 /* private uid is kept up to date, conf_data may be outdated */ 2107 if (startpriv->uid.type != UA_BASE_DEVICE) { 2108 pfxdata.validity.verify_base = 1; 2109 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2110 pfxdata.validity.hyper_pav = 1; 2111 } 2112 2113 switch (cmd) { 2114 case DASD_ECKD_CCW_READ_TRACK_DATA: 2115 dedata->mask.perm = 0x1; 2116 dedata->attributes.operation = basepriv->attrib.operation; 2117 dedata->blk_size = blksize; 2118 dedata->ga_extended |= 0x42; 2119 lredata->operation.orientation = 0x0; 2120 lredata->operation.operation = 0x0C; 2121 lredata->auxiliary.check_bytes = 0x01; 2122 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2123 break; 2124 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2125 dedata->mask.perm = 0x02; 2126 dedata->attributes.operation = basepriv->attrib.operation; 2127 dedata->blk_size = blksize; 2128 rc = check_XRC_on_prefix(&pfxdata, basedev); 2129 dedata->ga_extended |= 0x42; 2130 lredata->operation.orientation = 0x0; 2131 lredata->operation.operation = 0x3F; 2132 lredata->extended_operation = 0x23; 2133 lredata->auxiliary.check_bytes = 0x2; 2134 pfx_cmd = DASD_ECKD_CCW_PFX; 2135 break; 2136 default: 2137 DBF_DEV_EVENT(DBF_ERR, basedev, 2138 "prepare itcw, unknown opcode 0x%x", cmd); 2139 BUG(); 2140 break; 2141 } 2142 if (rc) 2143 return rc; 2144 2145 dedata->attributes.mode = 0x3; /* ECKD */ 2146 2147 heads = basepriv->rdc_data.trk_per_cyl; 2148 begcyl = trk / heads; 2149 beghead = trk % heads; 2150 endcyl = totrk / heads; 2151 endhead = totrk % heads; 2152 2153 /* check for sequential prestage - enhance cylinder range */ 2154 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2155 dedata->attributes.operation == DASD_SEQ_ACCESS) { 2156 2157 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2158 endcyl += basepriv->attrib.nr_cyl; 2159 else 2160 endcyl = (basepriv->real_cyl - 1); 2161 } 2162 2163 set_ch_t(&dedata->beg_ext, begcyl, beghead); 2164 set_ch_t(&dedata->end_ext, endcyl, endhead); 2165 2166 dedata->ep_format = 0x20; /* records per track is valid */ 2167 dedata->ep_rec_per_track = blk_per_trk; 2168 2169 if (rec_on_trk) { 2170 switch (basepriv->rdc_data.dev_type) { 2171 case 0x3390: 2172 dn = ceil_quot(blksize + 6, 232); 2173 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2174 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2175 break; 2176 case 0x3380: 2177 d = 7 + ceil_quot(blksize + 12, 32); 2178 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2179 break; 2180 } 2181 } 2182 2183 lredata->auxiliary.length_valid = 1; 2184 lredata->auxiliary.length_scope = 1; 2185 lredata->auxiliary.imbedded_ccw_valid = 1; 2186 lredata->length = tlf; 2187 lredata->imbedded_ccw = cmd; 2188 lredata->count = count; 2189 lredata->sector = sector; 2190 set_ch_t(&lredata->seek_addr, begcyl, beghead); 2191 lredata->search_arg.cyl = lredata->seek_addr.cyl; 2192 lredata->search_arg.head = lredata->seek_addr.head; 2193 lredata->search_arg.record = rec_on_trk; 2194 2195 dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2196 &pfxdata, sizeof(pfxdata), total_data_size); 2197 2198 return rc; 2199 } 2200 2201 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2202 struct dasd_device *startdev, 2203 struct dasd_block *block, 2204 struct request *req, 2205 sector_t first_rec, 2206 sector_t last_rec, 2207 sector_t first_trk, 2208 sector_t last_trk, 2209 unsigned int first_offs, 2210 unsigned int last_offs, 2211 unsigned int blk_per_trk, 2212 unsigned int blksize) 2213 { 2214 struct dasd_eckd_private *private; 2215 struct dasd_ccw_req *cqr; 2216 struct req_iterator iter; 2217 struct bio_vec *bv; 2218 char *dst; 2219 unsigned int trkcount, ctidaw; 2220 unsigned char cmd; 2221 struct dasd_device *basedev; 2222 unsigned int tlf; 2223 struct itcw *itcw; 2224 struct tidaw *last_tidaw = NULL; 2225 int itcw_op; 2226 size_t itcw_size; 2227 2228 basedev = block->base; 2229 private = (struct dasd_eckd_private *) basedev->private; 2230 if (rq_data_dir(req) == READ) { 2231 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2232 itcw_op = ITCW_OP_READ; 2233 } else if (rq_data_dir(req) == WRITE) { 2234 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2235 itcw_op = ITCW_OP_WRITE; 2236 } else 2237 return ERR_PTR(-EINVAL); 2238 2239 /* trackbased I/O needs address all memory via TIDAWs, 2240 * not just for 64 bit addresses. This allows us to map 2241 * each segment directly to one tidaw. 2242 */ 2243 trkcount = last_trk - first_trk + 1; 2244 ctidaw = 0; 2245 rq_for_each_segment(bv, req, iter) { 2246 ++ctidaw; 2247 } 2248 2249 /* Allocate the ccw request. */ 2250 itcw_size = itcw_calc_size(0, ctidaw, 0); 2251 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2252 if (IS_ERR(cqr)) 2253 return cqr; 2254 2255 cqr->cpmode = 1; 2256 cqr->startdev = startdev; 2257 cqr->memdev = startdev; 2258 cqr->block = block; 2259 cqr->expires = 100*HZ; 2260 cqr->buildclk = get_clock(); 2261 cqr->status = DASD_CQR_FILLED; 2262 cqr->retries = 10; 2263 2264 /* transfer length factor: how many bytes to read from the last track */ 2265 if (first_trk == last_trk) 2266 tlf = last_offs - first_offs + 1; 2267 else 2268 tlf = last_offs + 1; 2269 tlf *= blksize; 2270 2271 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2272 cqr->cpaddr = itcw_get_tcw(itcw); 2273 2274 if (prepare_itcw(itcw, first_trk, last_trk, 2275 cmd, basedev, startdev, 2276 first_offs + 1, 2277 trkcount, blksize, 2278 (last_rec - first_rec + 1) * blksize, 2279 tlf, blk_per_trk) == -EAGAIN) { 2280 /* Clock not in sync and XRC is enabled. 2281 * Try again later. 2282 */ 2283 dasd_sfree_request(cqr, startdev); 2284 return ERR_PTR(-EAGAIN); 2285 } 2286 2287 /* 2288 * A tidaw can address 4k of memory, but must not cross page boundaries 2289 * We can let the block layer handle this by setting 2290 * blk_queue_segment_boundary to page boundaries and 2291 * blk_max_segment_size to page size when setting up the request queue. 2292 */ 2293 rq_for_each_segment(bv, req, iter) { 2294 dst = page_address(bv->bv_page) + bv->bv_offset; 2295 last_tidaw = itcw_add_tidaw(itcw, 0x00, dst, bv->bv_len); 2296 if (IS_ERR(last_tidaw)) 2297 return (struct dasd_ccw_req *)last_tidaw; 2298 } 2299 2300 last_tidaw->flags |= 0x80; 2301 itcw_finalize(itcw); 2302 2303 if (blk_noretry_request(req) || 2304 block->base->features & DASD_FEATURE_FAILFAST) 2305 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2306 cqr->startdev = startdev; 2307 cqr->memdev = startdev; 2308 cqr->block = block; 2309 cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 2310 cqr->lpm = private->path_data.ppm; 2311 cqr->retries = 256; 2312 cqr->buildclk = get_clock(); 2313 cqr->status = DASD_CQR_FILLED; 2314 return cqr; 2315 } 2316 2317 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 2318 struct dasd_block *block, 2319 struct request *req) 2320 { 2321 int tpm, cmdrtd, cmdwtd; 2322 int use_prefix; 2323 #if defined(CONFIG_64BIT) 2324 int fcx_in_css, fcx_in_gneq, fcx_in_features; 2325 #endif 2326 struct dasd_eckd_private *private; 2327 struct dasd_device *basedev; 2328 sector_t first_rec, last_rec; 2329 sector_t first_trk, last_trk; 2330 unsigned int first_offs, last_offs; 2331 unsigned int blk_per_trk, blksize; 2332 int cdlspecial; 2333 struct dasd_ccw_req *cqr; 2334 2335 basedev = block->base; 2336 private = (struct dasd_eckd_private *) basedev->private; 2337 2338 /* Calculate number of blocks/records per track. */ 2339 blksize = block->bp_block; 2340 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 2341 /* Calculate record id of first and last block. */ 2342 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 2343 first_offs = sector_div(first_trk, blk_per_trk); 2344 last_rec = last_trk = 2345 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 2346 last_offs = sector_div(last_trk, blk_per_trk); 2347 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 2348 2349 /* is transport mode supported? */ 2350 #if defined(CONFIG_64BIT) 2351 fcx_in_css = css_general_characteristics.fcx; 2352 fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 2353 fcx_in_features = private->features.feature[40] & 0x80; 2354 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 2355 #else 2356 tpm = 0; 2357 #endif 2358 2359 /* is read track data and write track data in command mode supported? */ 2360 cmdrtd = private->features.feature[9] & 0x20; 2361 cmdwtd = private->features.feature[12] & 0x40; 2362 use_prefix = private->features.feature[8] & 0x01; 2363 2364 cqr = NULL; 2365 if (cdlspecial || dasd_page_cache) { 2366 /* do nothing, just fall through to the cmd mode single case */ 2367 } else if (!dasd_nofcx && tpm && (first_trk == last_trk)) { 2368 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 2369 first_rec, last_rec, 2370 first_trk, last_trk, 2371 first_offs, last_offs, 2372 blk_per_trk, blksize); 2373 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 2374 cqr = NULL; 2375 } else if (use_prefix && 2376 (((rq_data_dir(req) == READ) && cmdrtd) || 2377 ((rq_data_dir(req) == WRITE) && cmdwtd))) { 2378 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 2379 first_rec, last_rec, 2380 first_trk, last_trk, 2381 first_offs, last_offs, 2382 blk_per_trk, blksize); 2383 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 2384 cqr = NULL; 2385 } 2386 if (!cqr) 2387 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 2388 first_rec, last_rec, 2389 first_trk, last_trk, 2390 first_offs, last_offs, 2391 blk_per_trk, blksize); 2392 return cqr; 2393 } 2394 2395 static int 2396 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 2397 { 2398 struct dasd_eckd_private *private; 2399 struct ccw1 *ccw; 2400 struct req_iterator iter; 2401 struct bio_vec *bv; 2402 char *dst, *cda; 2403 unsigned int blksize, blk_per_trk, off; 2404 sector_t recid; 2405 int status; 2406 2407 if (!dasd_page_cache) 2408 goto out; 2409 private = (struct dasd_eckd_private *) cqr->block->base->private; 2410 blksize = cqr->block->bp_block; 2411 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 2412 recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 2413 ccw = cqr->cpaddr; 2414 /* Skip over define extent & locate record. */ 2415 ccw++; 2416 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 2417 ccw++; 2418 rq_for_each_segment(bv, req, iter) { 2419 dst = page_address(bv->bv_page) + bv->bv_offset; 2420 for (off = 0; off < bv->bv_len; off += blksize) { 2421 /* Skip locate record. */ 2422 if (private->uses_cdl && recid <= 2*blk_per_trk) 2423 ccw++; 2424 if (dst) { 2425 if (ccw->flags & CCW_FLAG_IDA) 2426 cda = *((char **)((addr_t) ccw->cda)); 2427 else 2428 cda = (char *)((addr_t) ccw->cda); 2429 if (dst != cda) { 2430 if (rq_data_dir(req) == READ) 2431 memcpy(dst, cda, bv->bv_len); 2432 kmem_cache_free(dasd_page_cache, 2433 (void *)((addr_t)cda & PAGE_MASK)); 2434 } 2435 dst = NULL; 2436 } 2437 ccw++; 2438 recid++; 2439 } 2440 } 2441 out: 2442 status = cqr->status == DASD_CQR_DONE; 2443 dasd_sfree_request(cqr, cqr->memdev); 2444 return status; 2445 } 2446 2447 /* 2448 * Modify ccw/tcw in cqr so it can be started on a base device. 2449 * 2450 * Note that this is not enough to restart the cqr! 2451 * Either reset cqr->startdev as well (summary unit check handling) 2452 * or restart via separate cqr (as in ERP handling). 2453 */ 2454 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 2455 { 2456 struct ccw1 *ccw; 2457 struct PFX_eckd_data *pfxdata; 2458 struct tcw *tcw; 2459 struct tccb *tccb; 2460 struct dcw *dcw; 2461 2462 if (cqr->cpmode == 1) { 2463 tcw = cqr->cpaddr; 2464 tccb = tcw_get_tccb(tcw); 2465 dcw = (struct dcw *)&tccb->tca[0]; 2466 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 2467 pfxdata->validity.verify_base = 0; 2468 pfxdata->validity.hyper_pav = 0; 2469 } else { 2470 ccw = cqr->cpaddr; 2471 pfxdata = cqr->data; 2472 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 2473 pfxdata->validity.verify_base = 0; 2474 pfxdata->validity.hyper_pav = 0; 2475 } 2476 } 2477 } 2478 2479 #define DASD_ECKD_CHANQ_MAX_SIZE 4 2480 2481 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 2482 struct dasd_block *block, 2483 struct request *req) 2484 { 2485 struct dasd_eckd_private *private; 2486 struct dasd_device *startdev; 2487 unsigned long flags; 2488 struct dasd_ccw_req *cqr; 2489 2490 startdev = dasd_alias_get_start_dev(base); 2491 if (!startdev) 2492 startdev = base; 2493 private = (struct dasd_eckd_private *) startdev->private; 2494 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 2495 return ERR_PTR(-EBUSY); 2496 2497 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 2498 private->count++; 2499 cqr = dasd_eckd_build_cp(startdev, block, req); 2500 if (IS_ERR(cqr)) 2501 private->count--; 2502 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 2503 return cqr; 2504 } 2505 2506 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 2507 struct request *req) 2508 { 2509 struct dasd_eckd_private *private; 2510 unsigned long flags; 2511 2512 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 2513 private = (struct dasd_eckd_private *) cqr->memdev->private; 2514 private->count--; 2515 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 2516 return dasd_eckd_free_cp(cqr, req); 2517 } 2518 2519 static int 2520 dasd_eckd_fill_info(struct dasd_device * device, 2521 struct dasd_information2_t * info) 2522 { 2523 struct dasd_eckd_private *private; 2524 2525 private = (struct dasd_eckd_private *) device->private; 2526 info->label_block = 2; 2527 info->FBA_layout = private->uses_cdl ? 0 : 1; 2528 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 2529 info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 2530 memcpy(info->characteristics, &private->rdc_data, 2531 sizeof(struct dasd_eckd_characteristics)); 2532 info->confdata_size = min((unsigned long)private->conf_len, 2533 sizeof(info->configuration_data)); 2534 memcpy(info->configuration_data, private->conf_data, 2535 info->confdata_size); 2536 return 0; 2537 } 2538 2539 /* 2540 * SECTION: ioctl functions for eckd devices. 2541 */ 2542 2543 /* 2544 * Release device ioctl. 2545 * Buils a channel programm to releases a prior reserved 2546 * (see dasd_eckd_reserve) device. 2547 */ 2548 static int 2549 dasd_eckd_release(struct dasd_device *device) 2550 { 2551 struct dasd_ccw_req *cqr; 2552 int rc; 2553 struct ccw1 *ccw; 2554 2555 if (!capable(CAP_SYS_ADMIN)) 2556 return -EACCES; 2557 2558 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 2559 if (IS_ERR(cqr)) { 2560 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2561 "Could not allocate initialization request"); 2562 return PTR_ERR(cqr); 2563 } 2564 ccw = cqr->cpaddr; 2565 ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 2566 ccw->flags |= CCW_FLAG_SLI; 2567 ccw->count = 32; 2568 ccw->cda = (__u32)(addr_t) cqr->data; 2569 cqr->startdev = device; 2570 cqr->memdev = device; 2571 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 2572 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2573 cqr->retries = 2; /* set retry counter to enable basic ERP */ 2574 cqr->expires = 2 * HZ; 2575 cqr->buildclk = get_clock(); 2576 cqr->status = DASD_CQR_FILLED; 2577 2578 rc = dasd_sleep_on_immediatly(cqr); 2579 2580 dasd_sfree_request(cqr, cqr->memdev); 2581 return rc; 2582 } 2583 2584 /* 2585 * Reserve device ioctl. 2586 * Options are set to 'synchronous wait for interrupt' and 2587 * 'timeout the request'. This leads to a terminate IO if 2588 * the interrupt is outstanding for a certain time. 2589 */ 2590 static int 2591 dasd_eckd_reserve(struct dasd_device *device) 2592 { 2593 struct dasd_ccw_req *cqr; 2594 int rc; 2595 struct ccw1 *ccw; 2596 2597 if (!capable(CAP_SYS_ADMIN)) 2598 return -EACCES; 2599 2600 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 2601 if (IS_ERR(cqr)) { 2602 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2603 "Could not allocate initialization request"); 2604 return PTR_ERR(cqr); 2605 } 2606 ccw = cqr->cpaddr; 2607 ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 2608 ccw->flags |= CCW_FLAG_SLI; 2609 ccw->count = 32; 2610 ccw->cda = (__u32)(addr_t) cqr->data; 2611 cqr->startdev = device; 2612 cqr->memdev = device; 2613 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 2614 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2615 cqr->retries = 2; /* set retry counter to enable basic ERP */ 2616 cqr->expires = 2 * HZ; 2617 cqr->buildclk = get_clock(); 2618 cqr->status = DASD_CQR_FILLED; 2619 2620 rc = dasd_sleep_on_immediatly(cqr); 2621 2622 dasd_sfree_request(cqr, cqr->memdev); 2623 return rc; 2624 } 2625 2626 /* 2627 * Steal lock ioctl - unconditional reserve device. 2628 * Buils a channel programm to break a device's reservation. 2629 * (unconditional reserve) 2630 */ 2631 static int 2632 dasd_eckd_steal_lock(struct dasd_device *device) 2633 { 2634 struct dasd_ccw_req *cqr; 2635 int rc; 2636 struct ccw1 *ccw; 2637 2638 if (!capable(CAP_SYS_ADMIN)) 2639 return -EACCES; 2640 2641 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 2642 if (IS_ERR(cqr)) { 2643 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2644 "Could not allocate initialization request"); 2645 return PTR_ERR(cqr); 2646 } 2647 ccw = cqr->cpaddr; 2648 ccw->cmd_code = DASD_ECKD_CCW_SLCK; 2649 ccw->flags |= CCW_FLAG_SLI; 2650 ccw->count = 32; 2651 ccw->cda = (__u32)(addr_t) cqr->data; 2652 cqr->startdev = device; 2653 cqr->memdev = device; 2654 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 2655 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2656 cqr->retries = 2; /* set retry counter to enable basic ERP */ 2657 cqr->expires = 2 * HZ; 2658 cqr->buildclk = get_clock(); 2659 cqr->status = DASD_CQR_FILLED; 2660 2661 rc = dasd_sleep_on_immediatly(cqr); 2662 2663 dasd_sfree_request(cqr, cqr->memdev); 2664 return rc; 2665 } 2666 2667 /* 2668 * Read performance statistics 2669 */ 2670 static int 2671 dasd_eckd_performance(struct dasd_device *device, void __user *argp) 2672 { 2673 struct dasd_psf_prssd_data *prssdp; 2674 struct dasd_rssd_perf_stats_t *stats; 2675 struct dasd_ccw_req *cqr; 2676 struct ccw1 *ccw; 2677 int rc; 2678 2679 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 2680 (sizeof(struct dasd_psf_prssd_data) + 2681 sizeof(struct dasd_rssd_perf_stats_t)), 2682 device); 2683 if (IS_ERR(cqr)) { 2684 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2685 "Could not allocate initialization request"); 2686 return PTR_ERR(cqr); 2687 } 2688 cqr->startdev = device; 2689 cqr->memdev = device; 2690 cqr->retries = 0; 2691 cqr->expires = 10 * HZ; 2692 2693 /* Prepare for Read Subsystem Data */ 2694 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 2695 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 2696 prssdp->order = PSF_ORDER_PRSSD; 2697 prssdp->suborder = 0x01; /* Performance Statistics */ 2698 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 2699 2700 ccw = cqr->cpaddr; 2701 ccw->cmd_code = DASD_ECKD_CCW_PSF; 2702 ccw->count = sizeof(struct dasd_psf_prssd_data); 2703 ccw->flags |= CCW_FLAG_CC; 2704 ccw->cda = (__u32)(addr_t) prssdp; 2705 2706 /* Read Subsystem Data - Performance Statistics */ 2707 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 2708 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 2709 2710 ccw++; 2711 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 2712 ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 2713 ccw->cda = (__u32)(addr_t) stats; 2714 2715 cqr->buildclk = get_clock(); 2716 cqr->status = DASD_CQR_FILLED; 2717 rc = dasd_sleep_on(cqr); 2718 if (rc == 0) { 2719 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 2720 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 2721 if (copy_to_user(argp, stats, 2722 sizeof(struct dasd_rssd_perf_stats_t))) 2723 rc = -EFAULT; 2724 } 2725 dasd_sfree_request(cqr, cqr->memdev); 2726 return rc; 2727 } 2728 2729 /* 2730 * Get attributes (cache operations) 2731 * Returnes the cache attributes used in Define Extend (DE). 2732 */ 2733 static int 2734 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 2735 { 2736 struct dasd_eckd_private *private = 2737 (struct dasd_eckd_private *)device->private; 2738 struct attrib_data_t attrib = private->attrib; 2739 int rc; 2740 2741 if (!capable(CAP_SYS_ADMIN)) 2742 return -EACCES; 2743 if (!argp) 2744 return -EINVAL; 2745 2746 rc = 0; 2747 if (copy_to_user(argp, (long *) &attrib, 2748 sizeof(struct attrib_data_t))) 2749 rc = -EFAULT; 2750 2751 return rc; 2752 } 2753 2754 /* 2755 * Set attributes (cache operations) 2756 * Stores the attributes for cache operation to be used in Define Extend (DE). 2757 */ 2758 static int 2759 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 2760 { 2761 struct dasd_eckd_private *private = 2762 (struct dasd_eckd_private *)device->private; 2763 struct attrib_data_t attrib; 2764 2765 if (!capable(CAP_SYS_ADMIN)) 2766 return -EACCES; 2767 if (!argp) 2768 return -EINVAL; 2769 2770 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 2771 return -EFAULT; 2772 private->attrib = attrib; 2773 2774 dev_info(&device->cdev->dev, 2775 "The DASD cache mode was set to %x (%i cylinder prestage)\n", 2776 private->attrib.operation, private->attrib.nr_cyl); 2777 return 0; 2778 } 2779 2780 /* 2781 * Issue syscall I/O to EMC Symmetrix array. 2782 * CCWs are PSF and RSSD 2783 */ 2784 static int dasd_symm_io(struct dasd_device *device, void __user *argp) 2785 { 2786 struct dasd_symmio_parms usrparm; 2787 char *psf_data, *rssd_result; 2788 struct dasd_ccw_req *cqr; 2789 struct ccw1 *ccw; 2790 int rc; 2791 2792 /* Copy parms from caller */ 2793 rc = -EFAULT; 2794 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 2795 goto out; 2796 #ifndef CONFIG_64BIT 2797 /* Make sure pointers are sane even on 31 bit. */ 2798 if ((usrparm.psf_data >> 32) != 0 || (usrparm.rssd_result >> 32) != 0) { 2799 rc = -EINVAL; 2800 goto out; 2801 } 2802 #endif 2803 /* alloc I/O data area */ 2804 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 2805 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 2806 if (!psf_data || !rssd_result) { 2807 rc = -ENOMEM; 2808 goto out_free; 2809 } 2810 2811 /* get syscall header from user space */ 2812 rc = -EFAULT; 2813 if (copy_from_user(psf_data, 2814 (void __user *)(unsigned long) usrparm.psf_data, 2815 usrparm.psf_data_len)) 2816 goto out_free; 2817 2818 /* sanity check on syscall header */ 2819 if (psf_data[0] != 0x17 && psf_data[1] != 0xce) { 2820 rc = -EINVAL; 2821 goto out_free; 2822 } 2823 2824 /* setup CCWs for PSF + RSSD */ 2825 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 2826 if (IS_ERR(cqr)) { 2827 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2828 "Could not allocate initialization request"); 2829 rc = PTR_ERR(cqr); 2830 goto out_free; 2831 } 2832 2833 cqr->startdev = device; 2834 cqr->memdev = device; 2835 cqr->retries = 3; 2836 cqr->expires = 10 * HZ; 2837 cqr->buildclk = get_clock(); 2838 cqr->status = DASD_CQR_FILLED; 2839 2840 /* Build the ccws */ 2841 ccw = cqr->cpaddr; 2842 2843 /* PSF ccw */ 2844 ccw->cmd_code = DASD_ECKD_CCW_PSF; 2845 ccw->count = usrparm.psf_data_len; 2846 ccw->flags |= CCW_FLAG_CC; 2847 ccw->cda = (__u32)(addr_t) psf_data; 2848 2849 ccw++; 2850 2851 /* RSSD ccw */ 2852 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 2853 ccw->count = usrparm.rssd_result_len; 2854 ccw->flags = CCW_FLAG_SLI ; 2855 ccw->cda = (__u32)(addr_t) rssd_result; 2856 2857 rc = dasd_sleep_on(cqr); 2858 if (rc) 2859 goto out_sfree; 2860 2861 rc = -EFAULT; 2862 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 2863 rssd_result, usrparm.rssd_result_len)) 2864 goto out_sfree; 2865 rc = 0; 2866 2867 out_sfree: 2868 dasd_sfree_request(cqr, cqr->memdev); 2869 out_free: 2870 kfree(rssd_result); 2871 kfree(psf_data); 2872 out: 2873 DBF_DEV_EVENT(DBF_WARNING, device, "Symmetrix ioctl: rc=%d", rc); 2874 return rc; 2875 } 2876 2877 static int 2878 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 2879 { 2880 struct dasd_device *device = block->base; 2881 2882 switch (cmd) { 2883 case BIODASDGATTR: 2884 return dasd_eckd_get_attrib(device, argp); 2885 case BIODASDSATTR: 2886 return dasd_eckd_set_attrib(device, argp); 2887 case BIODASDPSRD: 2888 return dasd_eckd_performance(device, argp); 2889 case BIODASDRLSE: 2890 return dasd_eckd_release(device); 2891 case BIODASDRSRV: 2892 return dasd_eckd_reserve(device); 2893 case BIODASDSLCK: 2894 return dasd_eckd_steal_lock(device); 2895 case BIODASDSYMMIO: 2896 return dasd_symm_io(device, argp); 2897 default: 2898 return -ENOIOCTLCMD; 2899 } 2900 } 2901 2902 /* 2903 * Dump the range of CCWs into 'page' buffer 2904 * and return number of printed chars. 2905 */ 2906 static int 2907 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 2908 { 2909 int len, count; 2910 char *datap; 2911 2912 len = 0; 2913 while (from <= to) { 2914 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 2915 " CCW %p: %08X %08X DAT:", 2916 from, ((int *) from)[0], ((int *) from)[1]); 2917 2918 /* get pointer to data (consider IDALs) */ 2919 if (from->flags & CCW_FLAG_IDA) 2920 datap = (char *) *((addr_t *) (addr_t) from->cda); 2921 else 2922 datap = (char *) ((addr_t) from->cda); 2923 2924 /* dump data (max 32 bytes) */ 2925 for (count = 0; count < from->count && count < 32; count++) { 2926 if (count % 8 == 0) len += sprintf(page + len, " "); 2927 if (count % 4 == 0) len += sprintf(page + len, " "); 2928 len += sprintf(page + len, "%02x", datap[count]); 2929 } 2930 len += sprintf(page + len, "\n"); 2931 from++; 2932 } 2933 return len; 2934 } 2935 2936 static void 2937 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 2938 char *reason) 2939 { 2940 u64 *sense; 2941 2942 sense = (u64 *) dasd_get_sense(irb); 2943 if (sense) { 2944 DBF_DEV_EVENT(DBF_EMERG, device, 2945 "%s: %s %02x%02x%02x %016llx %016llx %016llx " 2946 "%016llx", reason, 2947 scsw_is_tm(&irb->scsw) ? "t" : "c", 2948 scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw), 2949 scsw_dstat(&irb->scsw), sense[0], sense[1], 2950 sense[2], sense[3]); 2951 } else { 2952 DBF_DEV_EVENT(DBF_EMERG, device, "%s", 2953 "SORRY - NO VALID SENSE AVAILABLE\n"); 2954 } 2955 } 2956 2957 /* 2958 * Print sense data and related channel program. 2959 * Parts are printed because printk buffer is only 1024 bytes. 2960 */ 2961 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 2962 struct dasd_ccw_req *req, struct irb *irb) 2963 { 2964 char *page; 2965 struct ccw1 *first, *last, *fail, *from, *to; 2966 int len, sl, sct; 2967 2968 page = (char *) get_zeroed_page(GFP_ATOMIC); 2969 if (page == NULL) { 2970 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2971 "No memory to dump sense data\n"); 2972 return; 2973 } 2974 /* dump the sense data */ 2975 len = sprintf(page, KERN_ERR PRINTK_HEADER 2976 " I/O status report for device %s:\n", 2977 dev_name(&device->cdev->dev)); 2978 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 2979 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n", 2980 req, scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw), 2981 scsw_cc(&irb->scsw), req->intrc); 2982 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 2983 " device %s: Failing CCW: %p\n", 2984 dev_name(&device->cdev->dev), 2985 (void *) (addr_t) irb->scsw.cmd.cpa); 2986 if (irb->esw.esw0.erw.cons) { 2987 for (sl = 0; sl < 4; sl++) { 2988 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 2989 " Sense(hex) %2d-%2d:", 2990 (8 * sl), ((8 * sl) + 7)); 2991 2992 for (sct = 0; sct < 8; sct++) { 2993 len += sprintf(page + len, " %02x", 2994 irb->ecw[8 * sl + sct]); 2995 } 2996 len += sprintf(page + len, "\n"); 2997 } 2998 2999 if (irb->ecw[27] & DASD_SENSE_BIT_0) { 3000 /* 24 Byte Sense Data */ 3001 sprintf(page + len, KERN_ERR PRINTK_HEADER 3002 " 24 Byte: %x MSG %x, " 3003 "%s MSGb to SYSOP\n", 3004 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 3005 irb->ecw[1] & 0x10 ? "" : "no"); 3006 } else { 3007 /* 32 Byte Sense Data */ 3008 sprintf(page + len, KERN_ERR PRINTK_HEADER 3009 " 32 Byte: Format: %x " 3010 "Exception class %x\n", 3011 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 3012 } 3013 } else { 3014 sprintf(page + len, KERN_ERR PRINTK_HEADER 3015 " SORRY - NO VALID SENSE AVAILABLE\n"); 3016 } 3017 printk("%s", page); 3018 3019 if (req) { 3020 /* req == NULL for unsolicited interrupts */ 3021 /* dump the Channel Program (max 140 Bytes per line) */ 3022 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3023 first = req->cpaddr; 3024 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3025 to = min(first + 6, last); 3026 len = sprintf(page, KERN_ERR PRINTK_HEADER 3027 " Related CP in req: %p\n", req); 3028 dasd_eckd_dump_ccw_range(first, to, page + len); 3029 printk("%s", page); 3030 3031 /* print failing CCW area (maximum 4) */ 3032 /* scsw->cda is either valid or zero */ 3033 len = 0; 3034 from = ++to; 3035 fail = (struct ccw1 *)(addr_t) 3036 irb->scsw.cmd.cpa; /* failing CCW */ 3037 if (from < fail - 2) { 3038 from = fail - 2; /* there is a gap - print header */ 3039 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 3040 } 3041 to = min(fail + 1, last); 3042 len += dasd_eckd_dump_ccw_range(from, to, page + len); 3043 3044 /* print last CCWs (maximum 2) */ 3045 from = max(from, ++to); 3046 if (from < last - 1) { 3047 from = last - 1; /* there is a gap - print header */ 3048 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 3049 } 3050 len += dasd_eckd_dump_ccw_range(from, last, page + len); 3051 if (len > 0) 3052 printk("%s", page); 3053 } 3054 free_page((unsigned long) page); 3055 } 3056 3057 3058 /* 3059 * Print sense data from a tcw. 3060 */ 3061 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 3062 struct dasd_ccw_req *req, struct irb *irb) 3063 { 3064 char *page; 3065 int len, sl, sct, residual; 3066 3067 struct tsb *tsb; 3068 u8 *sense; 3069 3070 3071 page = (char *) get_zeroed_page(GFP_ATOMIC); 3072 if (page == NULL) { 3073 DBF_DEV_EVENT(DBF_WARNING, device, " %s", 3074 "No memory to dump sense data"); 3075 return; 3076 } 3077 /* dump the sense data */ 3078 len = sprintf(page, KERN_ERR PRINTK_HEADER 3079 " I/O status report for device %s:\n", 3080 dev_name(&device->cdev->dev)); 3081 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3082 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d " 3083 "fcxs: 0x%02X schxs: 0x%02X\n", req, 3084 scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw), 3085 scsw_cc(&irb->scsw), req->intrc, 3086 irb->scsw.tm.fcxs, irb->scsw.tm.schxs); 3087 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3088 " device %s: Failing TCW: %p\n", 3089 dev_name(&device->cdev->dev), 3090 (void *) (addr_t) irb->scsw.tm.tcw); 3091 3092 tsb = NULL; 3093 sense = NULL; 3094 if (irb->scsw.tm.tcw) 3095 tsb = tcw_get_tsb( 3096 (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 3097 3098 if (tsb && (irb->scsw.tm.fcxs == 0x01)) { 3099 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3100 " tsb->length %d\n", tsb->length); 3101 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3102 " tsb->flags %x\n", tsb->flags); 3103 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3104 " tsb->dcw_offset %d\n", tsb->dcw_offset); 3105 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3106 " tsb->count %d\n", tsb->count); 3107 residual = tsb->count - 28; 3108 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3109 " residual %d\n", residual); 3110 3111 switch (tsb->flags & 0x07) { 3112 case 1: /* tsa_iostat */ 3113 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3114 " tsb->tsa.iostat.dev_time %d\n", 3115 tsb->tsa.iostat.dev_time); 3116 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3117 " tsb->tsa.iostat.def_time %d\n", 3118 tsb->tsa.iostat.def_time); 3119 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3120 " tsb->tsa.iostat.queue_time %d\n", 3121 tsb->tsa.iostat.queue_time); 3122 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3123 " tsb->tsa.iostat.dev_busy_time %d\n", 3124 tsb->tsa.iostat.dev_busy_time); 3125 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3126 " tsb->tsa.iostat.dev_act_time %d\n", 3127 tsb->tsa.iostat.dev_act_time); 3128 sense = tsb->tsa.iostat.sense; 3129 break; 3130 case 2: /* ts_ddpc */ 3131 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3132 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 3133 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3134 " tsb->tsa.ddpc.rcq: "); 3135 for (sl = 0; sl < 16; sl++) { 3136 for (sct = 0; sct < 8; sct++) { 3137 len += sprintf(page + len, " %02x", 3138 tsb->tsa.ddpc.rcq[sl]); 3139 } 3140 len += sprintf(page + len, "\n"); 3141 } 3142 sense = tsb->tsa.ddpc.sense; 3143 break; 3144 case 3: /* tsa_intrg */ 3145 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3146 " tsb->tsa.intrg.: not supportet yet \n"); 3147 break; 3148 } 3149 3150 if (sense) { 3151 for (sl = 0; sl < 4; sl++) { 3152 len += sprintf(page + len, 3153 KERN_ERR PRINTK_HEADER 3154 " Sense(hex) %2d-%2d:", 3155 (8 * sl), ((8 * sl) + 7)); 3156 for (sct = 0; sct < 8; sct++) { 3157 len += sprintf(page + len, " %02x", 3158 sense[8 * sl + sct]); 3159 } 3160 len += sprintf(page + len, "\n"); 3161 } 3162 3163 if (sense[27] & DASD_SENSE_BIT_0) { 3164 /* 24 Byte Sense Data */ 3165 sprintf(page + len, KERN_ERR PRINTK_HEADER 3166 " 24 Byte: %x MSG %x, " 3167 "%s MSGb to SYSOP\n", 3168 sense[7] >> 4, sense[7] & 0x0f, 3169 sense[1] & 0x10 ? "" : "no"); 3170 } else { 3171 /* 32 Byte Sense Data */ 3172 sprintf(page + len, KERN_ERR PRINTK_HEADER 3173 " 32 Byte: Format: %x " 3174 "Exception class %x\n", 3175 sense[6] & 0x0f, sense[22] >> 4); 3176 } 3177 } else { 3178 sprintf(page + len, KERN_ERR PRINTK_HEADER 3179 " SORRY - NO VALID SENSE AVAILABLE\n"); 3180 } 3181 } else { 3182 sprintf(page + len, KERN_ERR PRINTK_HEADER 3183 " SORRY - NO TSB DATA AVAILABLE\n"); 3184 } 3185 printk("%s", page); 3186 free_page((unsigned long) page); 3187 } 3188 3189 static void dasd_eckd_dump_sense(struct dasd_device *device, 3190 struct dasd_ccw_req *req, struct irb *irb) 3191 { 3192 if (req && scsw_is_tm(&req->irb.scsw)) 3193 dasd_eckd_dump_sense_tcw(device, req, irb); 3194 else 3195 dasd_eckd_dump_sense_ccw(device, req, irb); 3196 } 3197 3198 int dasd_eckd_pm_freeze(struct dasd_device *device) 3199 { 3200 /* 3201 * the device should be disconnected from our LCU structure 3202 * on restore we will reconnect it and reread LCU specific 3203 * information like PAV support that might have changed 3204 */ 3205 dasd_alias_remove_device(device); 3206 dasd_alias_disconnect_device_from_lcu(device); 3207 3208 return 0; 3209 } 3210 3211 int dasd_eckd_restore_device(struct dasd_device *device) 3212 { 3213 struct dasd_eckd_private *private; 3214 int is_known, rc; 3215 struct dasd_uid temp_uid; 3216 3217 private = (struct dasd_eckd_private *) device->private; 3218 3219 /* Read Configuration Data */ 3220 rc = dasd_eckd_read_conf(device); 3221 if (rc) 3222 goto out_err; 3223 3224 /* Generate device unique id and register in devmap */ 3225 rc = dasd_eckd_generate_uid(device, &private->uid); 3226 dasd_get_uid(device->cdev, &temp_uid); 3227 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 3228 dev_err(&device->cdev->dev, "The UID of the DASD has changed\n"); 3229 if (rc) 3230 goto out_err; 3231 dasd_set_uid(device->cdev, &private->uid); 3232 3233 /* register lcu with alias handling, enable PAV if this is a new lcu */ 3234 is_known = dasd_alias_make_device_known_to_lcu(device); 3235 if (is_known < 0) 3236 return is_known; 3237 if (!is_known) { 3238 /* new lcu found */ 3239 rc = dasd_eckd_validate_server(device); /* will switch pav on */ 3240 if (rc) 3241 goto out_err; 3242 } 3243 3244 /* Read Feature Codes */ 3245 dasd_eckd_read_features(device); 3246 3247 /* Read Device Characteristics */ 3248 memset(&private->rdc_data, 0, sizeof(private->rdc_data)); 3249 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 3250 &private->rdc_data, 64); 3251 if (rc) { 3252 DBF_EVENT(DBF_WARNING, 3253 "Read device characteristics failed, rc=%d for " 3254 "device: %s", rc, dev_name(&device->cdev->dev)); 3255 goto out_err; 3256 } 3257 3258 /* add device to alias management */ 3259 dasd_alias_add_device(device); 3260 3261 return 0; 3262 3263 out_err: 3264 return -1; 3265 } 3266 3267 static struct ccw_driver dasd_eckd_driver = { 3268 .name = "dasd-eckd", 3269 .owner = THIS_MODULE, 3270 .ids = dasd_eckd_ids, 3271 .probe = dasd_eckd_probe, 3272 .remove = dasd_generic_remove, 3273 .set_offline = dasd_generic_set_offline, 3274 .set_online = dasd_eckd_set_online, 3275 .notify = dasd_generic_notify, 3276 .freeze = dasd_generic_pm_freeze, 3277 .thaw = dasd_generic_restore_device, 3278 .restore = dasd_generic_restore_device, 3279 }; 3280 3281 /* 3282 * max_blocks is dependent on the amount of storage that is available 3283 * in the static io buffer for each device. Currently each device has 3284 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 3285 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 3286 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 3287 * addition we have one define extent ccw + 16 bytes of data and one 3288 * locate record ccw + 16 bytes of data. That makes: 3289 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 3290 * We want to fit two into the available memory so that we can immediately 3291 * start the next request if one finishes off. That makes 249.5 blocks 3292 * for one request. Give a little safety and the result is 240. 3293 */ 3294 static struct dasd_discipline dasd_eckd_discipline = { 3295 .owner = THIS_MODULE, 3296 .name = "ECKD", 3297 .ebcname = "ECKD", 3298 .max_blocks = 240, 3299 .check_device = dasd_eckd_check_characteristics, 3300 .uncheck_device = dasd_eckd_uncheck_device, 3301 .do_analysis = dasd_eckd_do_analysis, 3302 .ready_to_online = dasd_eckd_ready_to_online, 3303 .online_to_ready = dasd_eckd_online_to_ready, 3304 .fill_geometry = dasd_eckd_fill_geometry, 3305 .start_IO = dasd_start_IO, 3306 .term_IO = dasd_term_IO, 3307 .handle_terminated_request = dasd_eckd_handle_terminated_request, 3308 .format_device = dasd_eckd_format_device, 3309 .erp_action = dasd_eckd_erp_action, 3310 .erp_postaction = dasd_eckd_erp_postaction, 3311 .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt, 3312 .build_cp = dasd_eckd_build_alias_cp, 3313 .free_cp = dasd_eckd_free_alias_cp, 3314 .dump_sense = dasd_eckd_dump_sense, 3315 .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 3316 .fill_info = dasd_eckd_fill_info, 3317 .ioctl = dasd_eckd_ioctl, 3318 .freeze = dasd_eckd_pm_freeze, 3319 .restore = dasd_eckd_restore_device, 3320 }; 3321 3322 static int __init 3323 dasd_eckd_init(void) 3324 { 3325 int ret; 3326 3327 ASCEBC(dasd_eckd_discipline.ebcname, 4); 3328 ret = ccw_driver_register(&dasd_eckd_driver); 3329 if (!ret) 3330 wait_for_device_probe(); 3331 3332 return ret; 3333 } 3334 3335 static void __exit 3336 dasd_eckd_cleanup(void) 3337 { 3338 ccw_driver_unregister(&dasd_eckd_driver); 3339 } 3340 3341 module_init(dasd_eckd_init); 3342 module_exit(dasd_eckd_cleanup); 3343