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 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 939 (sizeof(struct dasd_psf_prssd_data) + 940 sizeof(struct dasd_rssd_features)), 941 device); 942 if (IS_ERR(cqr)) { 943 DBF_EVENT(DBF_WARNING, "Could not allocate initialization " 944 "request for device: %s", 945 dev_name(&device->cdev->dev)); 946 return PTR_ERR(cqr); 947 } 948 cqr->startdev = device; 949 cqr->memdev = device; 950 cqr->block = NULL; 951 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 952 cqr->retries = 5; 953 cqr->expires = 10 * HZ; 954 955 /* Prepare for Read Subsystem Data */ 956 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 957 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 958 prssdp->order = PSF_ORDER_PRSSD; 959 prssdp->suborder = 0x41; /* Read Feature Codes */ 960 /* all other bytes of prssdp must be zero */ 961 962 ccw = cqr->cpaddr; 963 ccw->cmd_code = DASD_ECKD_CCW_PSF; 964 ccw->count = sizeof(struct dasd_psf_prssd_data); 965 ccw->flags |= CCW_FLAG_CC; 966 ccw->cda = (__u32)(addr_t) prssdp; 967 968 /* Read Subsystem Data - feature codes */ 969 features = (struct dasd_rssd_features *) (prssdp + 1); 970 memset(features, 0, sizeof(struct dasd_rssd_features)); 971 972 ccw++; 973 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 974 ccw->count = sizeof(struct dasd_rssd_features); 975 ccw->cda = (__u32)(addr_t) features; 976 977 cqr->buildclk = get_clock(); 978 cqr->status = DASD_CQR_FILLED; 979 rc = dasd_sleep_on(cqr); 980 if (rc == 0) { 981 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 982 features = (struct dasd_rssd_features *) (prssdp + 1); 983 memcpy(&private->features, features, 984 sizeof(struct dasd_rssd_features)); 985 } 986 dasd_sfree_request(cqr, cqr->memdev); 987 return rc; 988 } 989 990 991 /* 992 * Build CP for Perform Subsystem Function - SSC. 993 */ 994 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 995 int enable_pav) 996 { 997 struct dasd_ccw_req *cqr; 998 struct dasd_psf_ssc_data *psf_ssc_data; 999 struct ccw1 *ccw; 1000 1001 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 1002 sizeof(struct dasd_psf_ssc_data), 1003 device); 1004 1005 if (IS_ERR(cqr)) { 1006 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1007 "Could not allocate PSF-SSC request"); 1008 return cqr; 1009 } 1010 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 1011 psf_ssc_data->order = PSF_ORDER_SSC; 1012 psf_ssc_data->suborder = 0x40; 1013 if (enable_pav) { 1014 psf_ssc_data->suborder |= 0x88; 1015 psf_ssc_data->reserved[0] = 0x88; 1016 } 1017 ccw = cqr->cpaddr; 1018 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1019 ccw->cda = (__u32)(addr_t)psf_ssc_data; 1020 ccw->count = 66; 1021 1022 cqr->startdev = device; 1023 cqr->memdev = device; 1024 cqr->block = NULL; 1025 cqr->expires = 10*HZ; 1026 cqr->buildclk = get_clock(); 1027 cqr->status = DASD_CQR_FILLED; 1028 return cqr; 1029 } 1030 1031 /* 1032 * Perform Subsystem Function. 1033 * It is necessary to trigger CIO for channel revalidation since this 1034 * call might change behaviour of DASD devices. 1035 */ 1036 static int 1037 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav) 1038 { 1039 struct dasd_ccw_req *cqr; 1040 int rc; 1041 1042 cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 1043 if (IS_ERR(cqr)) 1044 return PTR_ERR(cqr); 1045 1046 rc = dasd_sleep_on(cqr); 1047 if (!rc) 1048 /* trigger CIO to reprobe devices */ 1049 css_schedule_reprobe(); 1050 dasd_sfree_request(cqr, cqr->memdev); 1051 return rc; 1052 } 1053 1054 /* 1055 * Valide storage server of current device. 1056 */ 1057 static int dasd_eckd_validate_server(struct dasd_device *device) 1058 { 1059 int rc; 1060 struct dasd_eckd_private *private; 1061 int enable_pav; 1062 1063 if (dasd_nopav || MACHINE_IS_VM) 1064 enable_pav = 0; 1065 else 1066 enable_pav = 1; 1067 rc = dasd_eckd_psf_ssc(device, enable_pav); 1068 /* may be requested feature is not available on server, 1069 * therefore just report error and go ahead */ 1070 private = (struct dasd_eckd_private *) device->private; 1071 DBF_EVENT(DBF_WARNING, "PSF-SSC on storage subsystem %s.%s.%04x " 1072 "returned rc=%d for device: %s", 1073 private->uid.vendor, private->uid.serial, 1074 private->uid.ssid, rc, dev_name(&device->cdev->dev)); 1075 /* RE-Read Configuration Data */ 1076 return dasd_eckd_read_conf(device); 1077 } 1078 1079 /* 1080 * Check device characteristics. 1081 * If the device is accessible using ECKD discipline, the device is enabled. 1082 */ 1083 static int 1084 dasd_eckd_check_characteristics(struct dasd_device *device) 1085 { 1086 struct dasd_eckd_private *private; 1087 struct dasd_block *block; 1088 int is_known, rc; 1089 1090 private = (struct dasd_eckd_private *) device->private; 1091 if (!private) { 1092 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 1093 if (!private) { 1094 dev_warn(&device->cdev->dev, 1095 "Allocating memory for private DASD data " 1096 "failed\n"); 1097 return -ENOMEM; 1098 } 1099 device->private = (void *) private; 1100 } else { 1101 memset(private, 0, sizeof(*private)); 1102 } 1103 /* Invalidate status of initial analysis. */ 1104 private->init_cqr_status = -1; 1105 /* Set default cache operations. */ 1106 private->attrib.operation = DASD_NORMAL_CACHE; 1107 private->attrib.nr_cyl = 0; 1108 1109 /* Read Configuration Data */ 1110 rc = dasd_eckd_read_conf(device); 1111 if (rc) 1112 goto out_err1; 1113 1114 /* Generate device unique id and register in devmap */ 1115 rc = dasd_eckd_generate_uid(device, &private->uid); 1116 if (rc) 1117 goto out_err1; 1118 dasd_set_uid(device->cdev, &private->uid); 1119 1120 if (private->uid.type == UA_BASE_DEVICE) { 1121 block = dasd_alloc_block(); 1122 if (IS_ERR(block)) { 1123 DBF_EVENT(DBF_WARNING, "could not allocate dasd " 1124 "block structure for device: %s", 1125 dev_name(&device->cdev->dev)); 1126 rc = PTR_ERR(block); 1127 goto out_err1; 1128 } 1129 device->block = block; 1130 block->base = device; 1131 } 1132 1133 /* register lcu with alias handling, enable PAV if this is a new lcu */ 1134 is_known = dasd_alias_make_device_known_to_lcu(device); 1135 if (is_known < 0) { 1136 rc = is_known; 1137 goto out_err2; 1138 } 1139 if (!is_known) { 1140 /* new lcu found */ 1141 rc = dasd_eckd_validate_server(device); /* will switch pav on */ 1142 if (rc) 1143 goto out_err3; 1144 } 1145 1146 /* Read Feature Codes */ 1147 rc = dasd_eckd_read_features(device); 1148 if (rc) 1149 goto out_err3; 1150 1151 /* Read Device Characteristics */ 1152 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 1153 &private->rdc_data, 64); 1154 if (rc) { 1155 DBF_EVENT(DBF_WARNING, 1156 "Read device characteristics failed, rc=%d for " 1157 "device: %s", rc, dev_name(&device->cdev->dev)); 1158 goto out_err3; 1159 } 1160 /* find the vaild cylinder size */ 1161 if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1162 private->rdc_data.long_no_cyl) 1163 private->real_cyl = private->rdc_data.long_no_cyl; 1164 else 1165 private->real_cyl = private->rdc_data.no_cyl; 1166 1167 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 1168 "with %d cylinders, %d heads, %d sectors\n", 1169 private->rdc_data.dev_type, 1170 private->rdc_data.dev_model, 1171 private->rdc_data.cu_type, 1172 private->rdc_data.cu_model.model, 1173 private->real_cyl, 1174 private->rdc_data.trk_per_cyl, 1175 private->rdc_data.sec_per_trk); 1176 return 0; 1177 1178 out_err3: 1179 dasd_alias_disconnect_device_from_lcu(device); 1180 out_err2: 1181 dasd_free_block(device->block); 1182 device->block = NULL; 1183 out_err1: 1184 kfree(private->conf_data); 1185 kfree(device->private); 1186 device->private = NULL; 1187 return rc; 1188 } 1189 1190 static void dasd_eckd_uncheck_device(struct dasd_device *device) 1191 { 1192 struct dasd_eckd_private *private; 1193 1194 private = (struct dasd_eckd_private *) device->private; 1195 dasd_alias_disconnect_device_from_lcu(device); 1196 private->ned = NULL; 1197 private->sneq = NULL; 1198 private->vdsneq = NULL; 1199 private->gneq = NULL; 1200 private->conf_len = 0; 1201 kfree(private->conf_data); 1202 private->conf_data = NULL; 1203 } 1204 1205 static struct dasd_ccw_req * 1206 dasd_eckd_analysis_ccw(struct dasd_device *device) 1207 { 1208 struct dasd_eckd_private *private; 1209 struct eckd_count *count_data; 1210 struct LO_eckd_data *LO_data; 1211 struct dasd_ccw_req *cqr; 1212 struct ccw1 *ccw; 1213 int cplength, datasize; 1214 int i; 1215 1216 private = (struct dasd_eckd_private *) device->private; 1217 1218 cplength = 8; 1219 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 1220 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 1221 if (IS_ERR(cqr)) 1222 return cqr; 1223 ccw = cqr->cpaddr; 1224 /* Define extent for the first 3 tracks. */ 1225 define_extent(ccw++, cqr->data, 0, 2, 1226 DASD_ECKD_CCW_READ_COUNT, device); 1227 LO_data = cqr->data + sizeof(struct DE_eckd_data); 1228 /* Locate record for the first 4 records on track 0. */ 1229 ccw[-1].flags |= CCW_FLAG_CC; 1230 locate_record(ccw++, LO_data++, 0, 0, 4, 1231 DASD_ECKD_CCW_READ_COUNT, device, 0); 1232 1233 count_data = private->count_area; 1234 for (i = 0; i < 4; i++) { 1235 ccw[-1].flags |= CCW_FLAG_CC; 1236 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1237 ccw->flags = 0; 1238 ccw->count = 8; 1239 ccw->cda = (__u32)(addr_t) count_data; 1240 ccw++; 1241 count_data++; 1242 } 1243 1244 /* Locate record for the first record on track 2. */ 1245 ccw[-1].flags |= CCW_FLAG_CC; 1246 locate_record(ccw++, LO_data++, 2, 0, 1, 1247 DASD_ECKD_CCW_READ_COUNT, device, 0); 1248 /* Read count ccw. */ 1249 ccw[-1].flags |= CCW_FLAG_CC; 1250 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 1251 ccw->flags = 0; 1252 ccw->count = 8; 1253 ccw->cda = (__u32)(addr_t) count_data; 1254 1255 cqr->block = NULL; 1256 cqr->startdev = device; 1257 cqr->memdev = device; 1258 cqr->retries = 0; 1259 cqr->buildclk = get_clock(); 1260 cqr->status = DASD_CQR_FILLED; 1261 return cqr; 1262 } 1263 1264 /* 1265 * This is the callback function for the init_analysis cqr. It saves 1266 * the status of the initial analysis ccw before it frees it and kicks 1267 * the device to continue the startup sequence. This will call 1268 * dasd_eckd_do_analysis again (if the devices has not been marked 1269 * for deletion in the meantime). 1270 */ 1271 static void 1272 dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) 1273 { 1274 struct dasd_eckd_private *private; 1275 struct dasd_device *device; 1276 1277 device = init_cqr->startdev; 1278 private = (struct dasd_eckd_private *) device->private; 1279 private->init_cqr_status = init_cqr->status; 1280 dasd_sfree_request(init_cqr, device); 1281 dasd_kick_device(device); 1282 } 1283 1284 static int 1285 dasd_eckd_start_analysis(struct dasd_block *block) 1286 { 1287 struct dasd_eckd_private *private; 1288 struct dasd_ccw_req *init_cqr; 1289 1290 private = (struct dasd_eckd_private *) block->base->private; 1291 init_cqr = dasd_eckd_analysis_ccw(block->base); 1292 if (IS_ERR(init_cqr)) 1293 return PTR_ERR(init_cqr); 1294 init_cqr->callback = dasd_eckd_analysis_callback; 1295 init_cqr->callback_data = NULL; 1296 init_cqr->expires = 5*HZ; 1297 dasd_add_request_head(init_cqr); 1298 return -EAGAIN; 1299 } 1300 1301 static int 1302 dasd_eckd_end_analysis(struct dasd_block *block) 1303 { 1304 struct dasd_device *device; 1305 struct dasd_eckd_private *private; 1306 struct eckd_count *count_area; 1307 unsigned int sb, blk_per_trk; 1308 int status, i; 1309 1310 device = block->base; 1311 private = (struct dasd_eckd_private *) device->private; 1312 status = private->init_cqr_status; 1313 private->init_cqr_status = -1; 1314 if (status != DASD_CQR_DONE) { 1315 dev_warn(&device->cdev->dev, 1316 "The DASD is not formatted\n"); 1317 return -EMEDIUMTYPE; 1318 } 1319 1320 private->uses_cdl = 1; 1321 /* Check Track 0 for Compatible Disk Layout */ 1322 count_area = NULL; 1323 for (i = 0; i < 3; i++) { 1324 if (private->count_area[i].kl != 4 || 1325 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 1326 private->uses_cdl = 0; 1327 break; 1328 } 1329 } 1330 if (i == 3) 1331 count_area = &private->count_area[4]; 1332 1333 if (private->uses_cdl == 0) { 1334 for (i = 0; i < 5; i++) { 1335 if ((private->count_area[i].kl != 0) || 1336 (private->count_area[i].dl != 1337 private->count_area[0].dl)) 1338 break; 1339 } 1340 if (i == 5) 1341 count_area = &private->count_area[0]; 1342 } else { 1343 if (private->count_area[3].record == 1) 1344 dev_warn(&device->cdev->dev, 1345 "Track 0 has no records following the VTOC\n"); 1346 } 1347 if (count_area != NULL && count_area->kl == 0) { 1348 /* we found notthing violating our disk layout */ 1349 if (dasd_check_blocksize(count_area->dl) == 0) 1350 block->bp_block = count_area->dl; 1351 } 1352 if (block->bp_block == 0) { 1353 dev_warn(&device->cdev->dev, 1354 "The disk layout of the DASD is not supported\n"); 1355 return -EMEDIUMTYPE; 1356 } 1357 block->s2b_shift = 0; /* bits to shift 512 to get a block */ 1358 for (sb = 512; sb < block->bp_block; sb = sb << 1) 1359 block->s2b_shift++; 1360 1361 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1362 block->blocks = (private->real_cyl * 1363 private->rdc_data.trk_per_cyl * 1364 blk_per_trk); 1365 1366 dev_info(&device->cdev->dev, 1367 "DASD with %d KB/block, %d KB total size, %d KB/track, " 1368 "%s\n", (block->bp_block >> 10), 1369 ((private->real_cyl * 1370 private->rdc_data.trk_per_cyl * 1371 blk_per_trk * (block->bp_block >> 9)) >> 1), 1372 ((blk_per_trk * block->bp_block) >> 10), 1373 private->uses_cdl ? 1374 "compatible disk layout" : "linux disk layout"); 1375 1376 return 0; 1377 } 1378 1379 static int dasd_eckd_do_analysis(struct dasd_block *block) 1380 { 1381 struct dasd_eckd_private *private; 1382 1383 private = (struct dasd_eckd_private *) block->base->private; 1384 if (private->init_cqr_status < 0) 1385 return dasd_eckd_start_analysis(block); 1386 else 1387 return dasd_eckd_end_analysis(block); 1388 } 1389 1390 static int dasd_eckd_ready_to_online(struct dasd_device *device) 1391 { 1392 return dasd_alias_add_device(device); 1393 }; 1394 1395 static int dasd_eckd_online_to_ready(struct dasd_device *device) 1396 { 1397 return dasd_alias_remove_device(device); 1398 }; 1399 1400 static int 1401 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 1402 { 1403 struct dasd_eckd_private *private; 1404 1405 private = (struct dasd_eckd_private *) block->base->private; 1406 if (dasd_check_blocksize(block->bp_block) == 0) { 1407 geo->sectors = recs_per_track(&private->rdc_data, 1408 0, block->bp_block); 1409 } 1410 geo->cylinders = private->rdc_data.no_cyl; 1411 geo->heads = private->rdc_data.trk_per_cyl; 1412 return 0; 1413 } 1414 1415 static struct dasd_ccw_req * 1416 dasd_eckd_format_device(struct dasd_device * device, 1417 struct format_data_t * fdata) 1418 { 1419 struct dasd_eckd_private *private; 1420 struct dasd_ccw_req *fcp; 1421 struct eckd_count *ect; 1422 struct ccw1 *ccw; 1423 void *data; 1424 int rpt; 1425 struct ch_t address; 1426 int cplength, datasize; 1427 int i; 1428 int intensity = 0; 1429 int r0_perm; 1430 1431 private = (struct dasd_eckd_private *) device->private; 1432 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 1433 set_ch_t(&address, 1434 fdata->start_unit / private->rdc_data.trk_per_cyl, 1435 fdata->start_unit % private->rdc_data.trk_per_cyl); 1436 1437 /* Sanity checks. */ 1438 if (fdata->start_unit >= 1439 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 1440 dev_warn(&device->cdev->dev, "Start track number %d used in " 1441 "formatting is too big\n", fdata->start_unit); 1442 return ERR_PTR(-EINVAL); 1443 } 1444 if (fdata->start_unit > fdata->stop_unit) { 1445 dev_warn(&device->cdev->dev, "Start track %d used in " 1446 "formatting exceeds end track\n", fdata->start_unit); 1447 return ERR_PTR(-EINVAL); 1448 } 1449 if (dasd_check_blocksize(fdata->blksize) != 0) { 1450 dev_warn(&device->cdev->dev, 1451 "The DASD cannot be formatted with block size %d\n", 1452 fdata->blksize); 1453 return ERR_PTR(-EINVAL); 1454 } 1455 1456 /* 1457 * fdata->intensity is a bit string that tells us what to do: 1458 * Bit 0: write record zero 1459 * Bit 1: write home address, currently not supported 1460 * Bit 2: invalidate tracks 1461 * Bit 3: use OS/390 compatible disk layout (cdl) 1462 * Bit 4: do not allow storage subsystem to modify record zero 1463 * Only some bit combinations do make sense. 1464 */ 1465 if (fdata->intensity & 0x10) { 1466 r0_perm = 0; 1467 intensity = fdata->intensity & ~0x10; 1468 } else { 1469 r0_perm = 1; 1470 intensity = fdata->intensity; 1471 } 1472 switch (intensity) { 1473 case 0x00: /* Normal format */ 1474 case 0x08: /* Normal format, use cdl. */ 1475 cplength = 2 + rpt; 1476 datasize = sizeof(struct DE_eckd_data) + 1477 sizeof(struct LO_eckd_data) + 1478 rpt * sizeof(struct eckd_count); 1479 break; 1480 case 0x01: /* Write record zero and format track. */ 1481 case 0x09: /* Write record zero and format track, use cdl. */ 1482 cplength = 3 + rpt; 1483 datasize = sizeof(struct DE_eckd_data) + 1484 sizeof(struct LO_eckd_data) + 1485 sizeof(struct eckd_count) + 1486 rpt * sizeof(struct eckd_count); 1487 break; 1488 case 0x04: /* Invalidate track. */ 1489 case 0x0c: /* Invalidate track, use cdl. */ 1490 cplength = 3; 1491 datasize = sizeof(struct DE_eckd_data) + 1492 sizeof(struct LO_eckd_data) + 1493 sizeof(struct eckd_count); 1494 break; 1495 default: 1496 dev_warn(&device->cdev->dev, "An I/O control call used " 1497 "incorrect flags 0x%x\n", fdata->intensity); 1498 return ERR_PTR(-EINVAL); 1499 } 1500 /* Allocate the format ccw request. */ 1501 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 1502 if (IS_ERR(fcp)) 1503 return fcp; 1504 1505 data = fcp->data; 1506 ccw = fcp->cpaddr; 1507 1508 switch (intensity & ~0x08) { 1509 case 0x00: /* Normal format. */ 1510 define_extent(ccw++, (struct DE_eckd_data *) data, 1511 fdata->start_unit, fdata->start_unit, 1512 DASD_ECKD_CCW_WRITE_CKD, device); 1513 /* grant subsystem permission to format R0 */ 1514 if (r0_perm) 1515 ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 1516 data += sizeof(struct DE_eckd_data); 1517 ccw[-1].flags |= CCW_FLAG_CC; 1518 locate_record(ccw++, (struct LO_eckd_data *) data, 1519 fdata->start_unit, 0, rpt, 1520 DASD_ECKD_CCW_WRITE_CKD, device, 1521 fdata->blksize); 1522 data += sizeof(struct LO_eckd_data); 1523 break; 1524 case 0x01: /* Write record zero + format track. */ 1525 define_extent(ccw++, (struct DE_eckd_data *) data, 1526 fdata->start_unit, fdata->start_unit, 1527 DASD_ECKD_CCW_WRITE_RECORD_ZERO, 1528 device); 1529 data += sizeof(struct DE_eckd_data); 1530 ccw[-1].flags |= CCW_FLAG_CC; 1531 locate_record(ccw++, (struct LO_eckd_data *) data, 1532 fdata->start_unit, 0, rpt + 1, 1533 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 1534 device->block->bp_block); 1535 data += sizeof(struct LO_eckd_data); 1536 break; 1537 case 0x04: /* Invalidate track. */ 1538 define_extent(ccw++, (struct DE_eckd_data *) data, 1539 fdata->start_unit, fdata->start_unit, 1540 DASD_ECKD_CCW_WRITE_CKD, device); 1541 data += sizeof(struct DE_eckd_data); 1542 ccw[-1].flags |= CCW_FLAG_CC; 1543 locate_record(ccw++, (struct LO_eckd_data *) data, 1544 fdata->start_unit, 0, 1, 1545 DASD_ECKD_CCW_WRITE_CKD, device, 8); 1546 data += sizeof(struct LO_eckd_data); 1547 break; 1548 } 1549 if (intensity & 0x01) { /* write record zero */ 1550 ect = (struct eckd_count *) data; 1551 data += sizeof(struct eckd_count); 1552 ect->cyl = address.cyl; 1553 ect->head = address.head; 1554 ect->record = 0; 1555 ect->kl = 0; 1556 ect->dl = 8; 1557 ccw[-1].flags |= CCW_FLAG_CC; 1558 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 1559 ccw->flags = CCW_FLAG_SLI; 1560 ccw->count = 8; 1561 ccw->cda = (__u32)(addr_t) ect; 1562 ccw++; 1563 } 1564 if ((intensity & ~0x08) & 0x04) { /* erase track */ 1565 ect = (struct eckd_count *) data; 1566 data += sizeof(struct eckd_count); 1567 ect->cyl = address.cyl; 1568 ect->head = address.head; 1569 ect->record = 1; 1570 ect->kl = 0; 1571 ect->dl = 0; 1572 ccw[-1].flags |= CCW_FLAG_CC; 1573 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 1574 ccw->flags = CCW_FLAG_SLI; 1575 ccw->count = 8; 1576 ccw->cda = (__u32)(addr_t) ect; 1577 } else { /* write remaining records */ 1578 for (i = 0; i < rpt; i++) { 1579 ect = (struct eckd_count *) data; 1580 data += sizeof(struct eckd_count); 1581 ect->cyl = address.cyl; 1582 ect->head = address.head; 1583 ect->record = i + 1; 1584 ect->kl = 0; 1585 ect->dl = fdata->blksize; 1586 /* Check for special tracks 0-1 when formatting CDL */ 1587 if ((intensity & 0x08) && 1588 fdata->start_unit == 0) { 1589 if (i < 3) { 1590 ect->kl = 4; 1591 ect->dl = sizes_trk0[i] - 4; 1592 } 1593 } 1594 if ((intensity & 0x08) && 1595 fdata->start_unit == 1) { 1596 ect->kl = 44; 1597 ect->dl = LABEL_SIZE - 44; 1598 } 1599 ccw[-1].flags |= CCW_FLAG_CC; 1600 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 1601 ccw->flags = CCW_FLAG_SLI; 1602 ccw->count = 8; 1603 ccw->cda = (__u32)(addr_t) ect; 1604 ccw++; 1605 } 1606 } 1607 fcp->startdev = device; 1608 fcp->memdev = device; 1609 clear_bit(DASD_CQR_FLAGS_USE_ERP, &fcp->flags); 1610 fcp->retries = 5; /* set retry counter to enable default ERP */ 1611 fcp->buildclk = get_clock(); 1612 fcp->status = DASD_CQR_FILLED; 1613 return fcp; 1614 } 1615 1616 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 1617 { 1618 cqr->status = DASD_CQR_FILLED; 1619 if (cqr->block && (cqr->startdev != cqr->block->base)) { 1620 dasd_eckd_reset_ccw_to_base_io(cqr); 1621 cqr->startdev = cqr->block->base; 1622 } 1623 }; 1624 1625 static dasd_erp_fn_t 1626 dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 1627 { 1628 struct dasd_device *device = (struct dasd_device *) cqr->startdev; 1629 struct ccw_device *cdev = device->cdev; 1630 1631 switch (cdev->id.cu_type) { 1632 case 0x3990: 1633 case 0x2105: 1634 case 0x2107: 1635 case 0x1750: 1636 return dasd_3990_erp_action; 1637 case 0x9343: 1638 case 0x3880: 1639 default: 1640 return dasd_default_erp_action; 1641 } 1642 } 1643 1644 static dasd_erp_fn_t 1645 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 1646 { 1647 return dasd_default_erp_postaction; 1648 } 1649 1650 1651 static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device, 1652 struct irb *irb) 1653 { 1654 char mask; 1655 char *sense = NULL; 1656 1657 /* first of all check for state change pending interrupt */ 1658 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 1659 if ((scsw_dstat(&irb->scsw) & mask) == mask) { 1660 dasd_generic_handle_state_change(device); 1661 return; 1662 } 1663 1664 /* summary unit check */ 1665 if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 1666 (irb->ecw[7] == 0x0D)) { 1667 dasd_alias_handle_summary_unit_check(device, irb); 1668 return; 1669 } 1670 1671 sense = dasd_get_sense(irb); 1672 /* service information message SIM */ 1673 if (sense && !(sense[27] & DASD_SENSE_BIT_0) && 1674 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 1675 dasd_3990_erp_handle_sim(device, sense); 1676 dasd_schedule_device_bh(device); 1677 return; 1678 } 1679 1680 if ((scsw_cc(&irb->scsw) == 1) && 1681 (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) && 1682 (scsw_actl(&irb->scsw) & SCSW_ACTL_START_PEND) && 1683 (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) { 1684 /* fake irb do nothing, they are handled elsewhere */ 1685 dasd_schedule_device_bh(device); 1686 return; 1687 } 1688 1689 if (!sense) { 1690 /* just report other unsolicited interrupts */ 1691 DBF_DEV_EVENT(DBF_ERR, device, "%s", 1692 "unsolicited interrupt received"); 1693 } else { 1694 DBF_DEV_EVENT(DBF_ERR, device, "%s", 1695 "unsolicited interrupt received " 1696 "(sense available)"); 1697 device->discipline->dump_sense_dbf(device, irb, "unsolicited"); 1698 } 1699 1700 dasd_schedule_device_bh(device); 1701 return; 1702 }; 1703 1704 1705 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 1706 struct dasd_device *startdev, 1707 struct dasd_block *block, 1708 struct request *req, 1709 sector_t first_rec, 1710 sector_t last_rec, 1711 sector_t first_trk, 1712 sector_t last_trk, 1713 unsigned int first_offs, 1714 unsigned int last_offs, 1715 unsigned int blk_per_trk, 1716 unsigned int blksize) 1717 { 1718 struct dasd_eckd_private *private; 1719 unsigned long *idaws; 1720 struct LO_eckd_data *LO_data; 1721 struct dasd_ccw_req *cqr; 1722 struct ccw1 *ccw; 1723 struct req_iterator iter; 1724 struct bio_vec *bv; 1725 char *dst; 1726 unsigned int off; 1727 int count, cidaw, cplength, datasize; 1728 sector_t recid; 1729 unsigned char cmd, rcmd; 1730 int use_prefix; 1731 struct dasd_device *basedev; 1732 1733 basedev = block->base; 1734 private = (struct dasd_eckd_private *) basedev->private; 1735 if (rq_data_dir(req) == READ) 1736 cmd = DASD_ECKD_CCW_READ_MT; 1737 else if (rq_data_dir(req) == WRITE) 1738 cmd = DASD_ECKD_CCW_WRITE_MT; 1739 else 1740 return ERR_PTR(-EINVAL); 1741 1742 /* Check struct bio and count the number of blocks for the request. */ 1743 count = 0; 1744 cidaw = 0; 1745 rq_for_each_segment(bv, req, iter) { 1746 if (bv->bv_len & (blksize - 1)) 1747 /* Eckd can only do full blocks. */ 1748 return ERR_PTR(-EINVAL); 1749 count += bv->bv_len >> (block->s2b_shift + 9); 1750 #if defined(CONFIG_64BIT) 1751 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 1752 cidaw += bv->bv_len >> (block->s2b_shift + 9); 1753 #endif 1754 } 1755 /* Paranoia. */ 1756 if (count != last_rec - first_rec + 1) 1757 return ERR_PTR(-EINVAL); 1758 1759 /* use the prefix command if available */ 1760 use_prefix = private->features.feature[8] & 0x01; 1761 if (use_prefix) { 1762 /* 1x prefix + number of blocks */ 1763 cplength = 2 + count; 1764 /* 1x prefix + cidaws*sizeof(long) */ 1765 datasize = sizeof(struct PFX_eckd_data) + 1766 sizeof(struct LO_eckd_data) + 1767 cidaw * sizeof(unsigned long); 1768 } else { 1769 /* 1x define extent + 1x locate record + number of blocks */ 1770 cplength = 2 + count; 1771 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 1772 datasize = sizeof(struct DE_eckd_data) + 1773 sizeof(struct LO_eckd_data) + 1774 cidaw * sizeof(unsigned long); 1775 } 1776 /* Find out the number of additional locate record ccws for cdl. */ 1777 if (private->uses_cdl && first_rec < 2*blk_per_trk) { 1778 if (last_rec >= 2*blk_per_trk) 1779 count = 2*blk_per_trk - first_rec; 1780 cplength += count; 1781 datasize += count*sizeof(struct LO_eckd_data); 1782 } 1783 /* Allocate the ccw request. */ 1784 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 1785 startdev); 1786 if (IS_ERR(cqr)) 1787 return cqr; 1788 ccw = cqr->cpaddr; 1789 /* First ccw is define extent or prefix. */ 1790 if (use_prefix) { 1791 if (prefix(ccw++, cqr->data, first_trk, 1792 last_trk, cmd, basedev, startdev) == -EAGAIN) { 1793 /* Clock not in sync and XRC is enabled. 1794 * Try again later. 1795 */ 1796 dasd_sfree_request(cqr, startdev); 1797 return ERR_PTR(-EAGAIN); 1798 } 1799 idaws = (unsigned long *) (cqr->data + 1800 sizeof(struct PFX_eckd_data)); 1801 } else { 1802 if (define_extent(ccw++, cqr->data, first_trk, 1803 last_trk, cmd, startdev) == -EAGAIN) { 1804 /* Clock not in sync and XRC is enabled. 1805 * Try again later. 1806 */ 1807 dasd_sfree_request(cqr, startdev); 1808 return ERR_PTR(-EAGAIN); 1809 } 1810 idaws = (unsigned long *) (cqr->data + 1811 sizeof(struct DE_eckd_data)); 1812 } 1813 /* Build locate_record+read/write/ccws. */ 1814 LO_data = (struct LO_eckd_data *) (idaws + cidaw); 1815 recid = first_rec; 1816 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 1817 /* Only standard blocks so there is just one locate record. */ 1818 ccw[-1].flags |= CCW_FLAG_CC; 1819 locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 1820 last_rec - recid + 1, cmd, basedev, blksize); 1821 } 1822 rq_for_each_segment(bv, req, iter) { 1823 dst = page_address(bv->bv_page) + bv->bv_offset; 1824 if (dasd_page_cache) { 1825 char *copy = kmem_cache_alloc(dasd_page_cache, 1826 GFP_DMA | __GFP_NOWARN); 1827 if (copy && rq_data_dir(req) == WRITE) 1828 memcpy(copy + bv->bv_offset, dst, bv->bv_len); 1829 if (copy) 1830 dst = copy + bv->bv_offset; 1831 } 1832 for (off = 0; off < bv->bv_len; off += blksize) { 1833 sector_t trkid = recid; 1834 unsigned int recoffs = sector_div(trkid, blk_per_trk); 1835 rcmd = cmd; 1836 count = blksize; 1837 /* Locate record for cdl special block ? */ 1838 if (private->uses_cdl && recid < 2*blk_per_trk) { 1839 if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 1840 rcmd |= 0x8; 1841 count = dasd_eckd_cdl_reclen(recid); 1842 if (count < blksize && 1843 rq_data_dir(req) == READ) 1844 memset(dst + count, 0xe5, 1845 blksize - count); 1846 } 1847 ccw[-1].flags |= CCW_FLAG_CC; 1848 locate_record(ccw++, LO_data++, 1849 trkid, recoffs + 1, 1850 1, rcmd, basedev, count); 1851 } 1852 /* Locate record for standard blocks ? */ 1853 if (private->uses_cdl && recid == 2*blk_per_trk) { 1854 ccw[-1].flags |= CCW_FLAG_CC; 1855 locate_record(ccw++, LO_data++, 1856 trkid, recoffs + 1, 1857 last_rec - recid + 1, 1858 cmd, basedev, count); 1859 } 1860 /* Read/write ccw. */ 1861 ccw[-1].flags |= CCW_FLAG_CC; 1862 ccw->cmd_code = rcmd; 1863 ccw->count = count; 1864 if (idal_is_needed(dst, blksize)) { 1865 ccw->cda = (__u32)(addr_t) idaws; 1866 ccw->flags = CCW_FLAG_IDA; 1867 idaws = idal_create_words(idaws, dst, blksize); 1868 } else { 1869 ccw->cda = (__u32)(addr_t) dst; 1870 ccw->flags = 0; 1871 } 1872 ccw++; 1873 dst += blksize; 1874 recid++; 1875 } 1876 } 1877 if (blk_noretry_request(req) || 1878 block->base->features & DASD_FEATURE_FAILFAST) 1879 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1880 cqr->startdev = startdev; 1881 cqr->memdev = startdev; 1882 cqr->block = block; 1883 cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 1884 cqr->lpm = private->path_data.ppm; 1885 cqr->retries = 256; 1886 cqr->buildclk = get_clock(); 1887 cqr->status = DASD_CQR_FILLED; 1888 return cqr; 1889 } 1890 1891 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 1892 struct dasd_device *startdev, 1893 struct dasd_block *block, 1894 struct request *req, 1895 sector_t first_rec, 1896 sector_t last_rec, 1897 sector_t first_trk, 1898 sector_t last_trk, 1899 unsigned int first_offs, 1900 unsigned int last_offs, 1901 unsigned int blk_per_trk, 1902 unsigned int blksize) 1903 { 1904 struct dasd_eckd_private *private; 1905 unsigned long *idaws; 1906 struct dasd_ccw_req *cqr; 1907 struct ccw1 *ccw; 1908 struct req_iterator iter; 1909 struct bio_vec *bv; 1910 char *dst, *idaw_dst; 1911 unsigned int cidaw, cplength, datasize; 1912 unsigned int tlf; 1913 sector_t recid; 1914 unsigned char cmd; 1915 struct dasd_device *basedev; 1916 unsigned int trkcount, count, count_to_trk_end; 1917 unsigned int idaw_len, seg_len, part_len, len_to_track_end; 1918 unsigned char new_track, end_idaw; 1919 sector_t trkid; 1920 unsigned int recoffs; 1921 1922 basedev = block->base; 1923 private = (struct dasd_eckd_private *) basedev->private; 1924 if (rq_data_dir(req) == READ) 1925 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 1926 else if (rq_data_dir(req) == WRITE) 1927 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 1928 else 1929 return ERR_PTR(-EINVAL); 1930 1931 /* Track based I/O needs IDAWs for each page, and not just for 1932 * 64 bit addresses. We need additional idals for pages 1933 * that get filled from two tracks, so we use the number 1934 * of records as upper limit. 1935 */ 1936 cidaw = last_rec - first_rec + 1; 1937 trkcount = last_trk - first_trk + 1; 1938 1939 /* 1x prefix + one read/write ccw per track */ 1940 cplength = 1 + trkcount; 1941 1942 /* on 31-bit we need space for two 32 bit addresses per page 1943 * on 64-bit one 64 bit address 1944 */ 1945 datasize = sizeof(struct PFX_eckd_data) + 1946 cidaw * sizeof(unsigned long long); 1947 1948 /* Allocate the ccw request. */ 1949 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 1950 startdev); 1951 if (IS_ERR(cqr)) 1952 return cqr; 1953 ccw = cqr->cpaddr; 1954 /* transfer length factor: how many bytes to read from the last track */ 1955 if (first_trk == last_trk) 1956 tlf = last_offs - first_offs + 1; 1957 else 1958 tlf = last_offs + 1; 1959 tlf *= blksize; 1960 1961 if (prefix_LRE(ccw++, cqr->data, first_trk, 1962 last_trk, cmd, basedev, startdev, 1963 1 /* format */, first_offs + 1, 1964 trkcount, blksize, 1965 tlf) == -EAGAIN) { 1966 /* Clock not in sync and XRC is enabled. 1967 * Try again later. 1968 */ 1969 dasd_sfree_request(cqr, startdev); 1970 return ERR_PTR(-EAGAIN); 1971 } 1972 1973 /* 1974 * The translation of request into ccw programs must meet the 1975 * following conditions: 1976 * - all idaws but the first and the last must address full pages 1977 * (or 2K blocks on 31-bit) 1978 * - the scope of a ccw and it's idal ends with the track boundaries 1979 */ 1980 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 1981 recid = first_rec; 1982 new_track = 1; 1983 end_idaw = 0; 1984 len_to_track_end = 0; 1985 idaw_dst = 0; 1986 idaw_len = 0; 1987 rq_for_each_segment(bv, req, iter) { 1988 dst = page_address(bv->bv_page) + bv->bv_offset; 1989 seg_len = bv->bv_len; 1990 while (seg_len) { 1991 if (new_track) { 1992 trkid = recid; 1993 recoffs = sector_div(trkid, blk_per_trk); 1994 count_to_trk_end = blk_per_trk - recoffs; 1995 count = min((last_rec - recid + 1), 1996 (sector_t)count_to_trk_end); 1997 len_to_track_end = count * blksize; 1998 ccw[-1].flags |= CCW_FLAG_CC; 1999 ccw->cmd_code = cmd; 2000 ccw->count = len_to_track_end; 2001 ccw->cda = (__u32)(addr_t)idaws; 2002 ccw->flags = CCW_FLAG_IDA; 2003 ccw++; 2004 recid += count; 2005 new_track = 0; 2006 /* first idaw for a ccw may start anywhere */ 2007 if (!idaw_dst) 2008 idaw_dst = dst; 2009 } 2010 /* If we start a new idaw, we must make sure that it 2011 * starts on an IDA_BLOCK_SIZE boundary. 2012 * If we continue an idaw, we must make sure that the 2013 * current segment begins where the so far accumulated 2014 * idaw ends 2015 */ 2016 if (!idaw_dst) { 2017 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 2018 dasd_sfree_request(cqr, startdev); 2019 return ERR_PTR(-ERANGE); 2020 } else 2021 idaw_dst = dst; 2022 } 2023 if ((idaw_dst + idaw_len) != dst) { 2024 dasd_sfree_request(cqr, startdev); 2025 return ERR_PTR(-ERANGE); 2026 } 2027 part_len = min(seg_len, len_to_track_end); 2028 seg_len -= part_len; 2029 dst += part_len; 2030 idaw_len += part_len; 2031 len_to_track_end -= part_len; 2032 /* collected memory area ends on an IDA_BLOCK border, 2033 * -> create an idaw 2034 * idal_create_words will handle cases where idaw_len 2035 * is larger then IDA_BLOCK_SIZE 2036 */ 2037 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2038 end_idaw = 1; 2039 /* We also need to end the idaw at track end */ 2040 if (!len_to_track_end) { 2041 new_track = 1; 2042 end_idaw = 1; 2043 } 2044 if (end_idaw) { 2045 idaws = idal_create_words(idaws, idaw_dst, 2046 idaw_len); 2047 idaw_dst = 0; 2048 idaw_len = 0; 2049 end_idaw = 0; 2050 } 2051 } 2052 } 2053 2054 if (blk_noretry_request(req) || 2055 block->base->features & DASD_FEATURE_FAILFAST) 2056 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2057 cqr->startdev = startdev; 2058 cqr->memdev = startdev; 2059 cqr->block = block; 2060 cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 2061 cqr->lpm = private->path_data.ppm; 2062 cqr->retries = 256; 2063 cqr->buildclk = get_clock(); 2064 cqr->status = DASD_CQR_FILLED; 2065 return cqr; 2066 } 2067 2068 static int prepare_itcw(struct itcw *itcw, 2069 unsigned int trk, unsigned int totrk, int cmd, 2070 struct dasd_device *basedev, 2071 struct dasd_device *startdev, 2072 unsigned int rec_on_trk, int count, 2073 unsigned int blksize, 2074 unsigned int total_data_size, 2075 unsigned int tlf, 2076 unsigned int blk_per_trk) 2077 { 2078 struct PFX_eckd_data pfxdata; 2079 struct dasd_eckd_private *basepriv, *startpriv; 2080 struct DE_eckd_data *dedata; 2081 struct LRE_eckd_data *lredata; 2082 struct dcw *dcw; 2083 2084 u32 begcyl, endcyl; 2085 u16 heads, beghead, endhead; 2086 u8 pfx_cmd; 2087 2088 int rc = 0; 2089 int sector = 0; 2090 int dn, d; 2091 2092 2093 /* setup prefix data */ 2094 basepriv = (struct dasd_eckd_private *) basedev->private; 2095 startpriv = (struct dasd_eckd_private *) startdev->private; 2096 dedata = &pfxdata.define_extent; 2097 lredata = &pfxdata.locate_record; 2098 2099 memset(&pfxdata, 0, sizeof(pfxdata)); 2100 pfxdata.format = 1; /* PFX with LRE */ 2101 pfxdata.base_address = basepriv->ned->unit_addr; 2102 pfxdata.base_lss = basepriv->ned->ID; 2103 pfxdata.validity.define_extent = 1; 2104 2105 /* private uid is kept up to date, conf_data may be outdated */ 2106 if (startpriv->uid.type != UA_BASE_DEVICE) { 2107 pfxdata.validity.verify_base = 1; 2108 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2109 pfxdata.validity.hyper_pav = 1; 2110 } 2111 2112 switch (cmd) { 2113 case DASD_ECKD_CCW_READ_TRACK_DATA: 2114 dedata->mask.perm = 0x1; 2115 dedata->attributes.operation = basepriv->attrib.operation; 2116 dedata->blk_size = blksize; 2117 dedata->ga_extended |= 0x42; 2118 lredata->operation.orientation = 0x0; 2119 lredata->operation.operation = 0x0C; 2120 lredata->auxiliary.check_bytes = 0x01; 2121 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2122 break; 2123 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2124 dedata->mask.perm = 0x02; 2125 dedata->attributes.operation = basepriv->attrib.operation; 2126 dedata->blk_size = blksize; 2127 rc = check_XRC_on_prefix(&pfxdata, basedev); 2128 dedata->ga_extended |= 0x42; 2129 lredata->operation.orientation = 0x0; 2130 lredata->operation.operation = 0x3F; 2131 lredata->extended_operation = 0x23; 2132 lredata->auxiliary.check_bytes = 0x2; 2133 pfx_cmd = DASD_ECKD_CCW_PFX; 2134 break; 2135 default: 2136 DBF_DEV_EVENT(DBF_ERR, basedev, 2137 "prepare itcw, unknown opcode 0x%x", cmd); 2138 BUG(); 2139 break; 2140 } 2141 if (rc) 2142 return rc; 2143 2144 dedata->attributes.mode = 0x3; /* ECKD */ 2145 2146 heads = basepriv->rdc_data.trk_per_cyl; 2147 begcyl = trk / heads; 2148 beghead = trk % heads; 2149 endcyl = totrk / heads; 2150 endhead = totrk % heads; 2151 2152 /* check for sequential prestage - enhance cylinder range */ 2153 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2154 dedata->attributes.operation == DASD_SEQ_ACCESS) { 2155 2156 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2157 endcyl += basepriv->attrib.nr_cyl; 2158 else 2159 endcyl = (basepriv->real_cyl - 1); 2160 } 2161 2162 set_ch_t(&dedata->beg_ext, begcyl, beghead); 2163 set_ch_t(&dedata->end_ext, endcyl, endhead); 2164 2165 dedata->ep_format = 0x20; /* records per track is valid */ 2166 dedata->ep_rec_per_track = blk_per_trk; 2167 2168 if (rec_on_trk) { 2169 switch (basepriv->rdc_data.dev_type) { 2170 case 0x3390: 2171 dn = ceil_quot(blksize + 6, 232); 2172 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2173 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2174 break; 2175 case 0x3380: 2176 d = 7 + ceil_quot(blksize + 12, 32); 2177 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2178 break; 2179 } 2180 } 2181 2182 lredata->auxiliary.length_valid = 1; 2183 lredata->auxiliary.length_scope = 1; 2184 lredata->auxiliary.imbedded_ccw_valid = 1; 2185 lredata->length = tlf; 2186 lredata->imbedded_ccw = cmd; 2187 lredata->count = count; 2188 lredata->sector = sector; 2189 set_ch_t(&lredata->seek_addr, begcyl, beghead); 2190 lredata->search_arg.cyl = lredata->seek_addr.cyl; 2191 lredata->search_arg.head = lredata->seek_addr.head; 2192 lredata->search_arg.record = rec_on_trk; 2193 2194 dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2195 &pfxdata, sizeof(pfxdata), total_data_size); 2196 2197 return rc; 2198 } 2199 2200 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2201 struct dasd_device *startdev, 2202 struct dasd_block *block, 2203 struct request *req, 2204 sector_t first_rec, 2205 sector_t last_rec, 2206 sector_t first_trk, 2207 sector_t last_trk, 2208 unsigned int first_offs, 2209 unsigned int last_offs, 2210 unsigned int blk_per_trk, 2211 unsigned int blksize) 2212 { 2213 struct dasd_eckd_private *private; 2214 struct dasd_ccw_req *cqr; 2215 struct req_iterator iter; 2216 struct bio_vec *bv; 2217 char *dst; 2218 unsigned int trkcount, ctidaw; 2219 unsigned char cmd; 2220 struct dasd_device *basedev; 2221 unsigned int tlf; 2222 struct itcw *itcw; 2223 struct tidaw *last_tidaw = NULL; 2224 int itcw_op; 2225 size_t itcw_size; 2226 2227 basedev = block->base; 2228 private = (struct dasd_eckd_private *) basedev->private; 2229 if (rq_data_dir(req) == READ) { 2230 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2231 itcw_op = ITCW_OP_READ; 2232 } else if (rq_data_dir(req) == WRITE) { 2233 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2234 itcw_op = ITCW_OP_WRITE; 2235 } else 2236 return ERR_PTR(-EINVAL); 2237 2238 /* trackbased I/O needs address all memory via TIDAWs, 2239 * not just for 64 bit addresses. This allows us to map 2240 * each segment directly to one tidaw. 2241 */ 2242 trkcount = last_trk - first_trk + 1; 2243 ctidaw = 0; 2244 rq_for_each_segment(bv, req, iter) { 2245 ++ctidaw; 2246 } 2247 2248 /* Allocate the ccw request. */ 2249 itcw_size = itcw_calc_size(0, ctidaw, 0); 2250 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2251 if (IS_ERR(cqr)) 2252 return cqr; 2253 2254 cqr->cpmode = 1; 2255 cqr->startdev = startdev; 2256 cqr->memdev = startdev; 2257 cqr->block = block; 2258 cqr->expires = 100*HZ; 2259 cqr->buildclk = get_clock(); 2260 cqr->status = DASD_CQR_FILLED; 2261 cqr->retries = 10; 2262 2263 /* transfer length factor: how many bytes to read from the last track */ 2264 if (first_trk == last_trk) 2265 tlf = last_offs - first_offs + 1; 2266 else 2267 tlf = last_offs + 1; 2268 tlf *= blksize; 2269 2270 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2271 cqr->cpaddr = itcw_get_tcw(itcw); 2272 2273 if (prepare_itcw(itcw, first_trk, last_trk, 2274 cmd, basedev, startdev, 2275 first_offs + 1, 2276 trkcount, blksize, 2277 (last_rec - first_rec + 1) * blksize, 2278 tlf, blk_per_trk) == -EAGAIN) { 2279 /* Clock not in sync and XRC is enabled. 2280 * Try again later. 2281 */ 2282 dasd_sfree_request(cqr, startdev); 2283 return ERR_PTR(-EAGAIN); 2284 } 2285 2286 /* 2287 * A tidaw can address 4k of memory, but must not cross page boundaries 2288 * We can let the block layer handle this by setting 2289 * blk_queue_segment_boundary to page boundaries and 2290 * blk_max_segment_size to page size when setting up the request queue. 2291 */ 2292 rq_for_each_segment(bv, req, iter) { 2293 dst = page_address(bv->bv_page) + bv->bv_offset; 2294 last_tidaw = itcw_add_tidaw(itcw, 0x00, dst, bv->bv_len); 2295 if (IS_ERR(last_tidaw)) 2296 return (struct dasd_ccw_req *)last_tidaw; 2297 } 2298 2299 last_tidaw->flags |= 0x80; 2300 itcw_finalize(itcw); 2301 2302 if (blk_noretry_request(req) || 2303 block->base->features & DASD_FEATURE_FAILFAST) 2304 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2305 cqr->startdev = startdev; 2306 cqr->memdev = startdev; 2307 cqr->block = block; 2308 cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 2309 cqr->lpm = private->path_data.ppm; 2310 cqr->retries = 256; 2311 cqr->buildclk = get_clock(); 2312 cqr->status = DASD_CQR_FILLED; 2313 return cqr; 2314 } 2315 2316 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 2317 struct dasd_block *block, 2318 struct request *req) 2319 { 2320 int tpm, cmdrtd, cmdwtd; 2321 int use_prefix; 2322 #if defined(CONFIG_64BIT) 2323 int fcx_in_css, fcx_in_gneq, fcx_in_features; 2324 #endif 2325 struct dasd_eckd_private *private; 2326 struct dasd_device *basedev; 2327 sector_t first_rec, last_rec; 2328 sector_t first_trk, last_trk; 2329 unsigned int first_offs, last_offs; 2330 unsigned int blk_per_trk, blksize; 2331 int cdlspecial; 2332 struct dasd_ccw_req *cqr; 2333 2334 basedev = block->base; 2335 private = (struct dasd_eckd_private *) basedev->private; 2336 2337 /* Calculate number of blocks/records per track. */ 2338 blksize = block->bp_block; 2339 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 2340 /* Calculate record id of first and last block. */ 2341 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 2342 first_offs = sector_div(first_trk, blk_per_trk); 2343 last_rec = last_trk = 2344 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 2345 last_offs = sector_div(last_trk, blk_per_trk); 2346 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 2347 2348 /* is transport mode supported? */ 2349 #if defined(CONFIG_64BIT) 2350 fcx_in_css = css_general_characteristics.fcx; 2351 fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 2352 fcx_in_features = private->features.feature[40] & 0x80; 2353 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 2354 #else 2355 tpm = 0; 2356 #endif 2357 2358 /* is read track data and write track data in command mode supported? */ 2359 cmdrtd = private->features.feature[9] & 0x20; 2360 cmdwtd = private->features.feature[12] & 0x40; 2361 use_prefix = private->features.feature[8] & 0x01; 2362 2363 cqr = NULL; 2364 if (cdlspecial || dasd_page_cache) { 2365 /* do nothing, just fall through to the cmd mode single case */ 2366 } else if (!dasd_nofcx && tpm && (first_trk == last_trk)) { 2367 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 2368 first_rec, last_rec, 2369 first_trk, last_trk, 2370 first_offs, last_offs, 2371 blk_per_trk, blksize); 2372 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 2373 cqr = NULL; 2374 } else if (use_prefix && 2375 (((rq_data_dir(req) == READ) && cmdrtd) || 2376 ((rq_data_dir(req) == WRITE) && cmdwtd))) { 2377 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 2378 first_rec, last_rec, 2379 first_trk, last_trk, 2380 first_offs, last_offs, 2381 blk_per_trk, blksize); 2382 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 2383 cqr = NULL; 2384 } 2385 if (!cqr) 2386 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 2387 first_rec, last_rec, 2388 first_trk, last_trk, 2389 first_offs, last_offs, 2390 blk_per_trk, blksize); 2391 return cqr; 2392 } 2393 2394 static int 2395 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 2396 { 2397 struct dasd_eckd_private *private; 2398 struct ccw1 *ccw; 2399 struct req_iterator iter; 2400 struct bio_vec *bv; 2401 char *dst, *cda; 2402 unsigned int blksize, blk_per_trk, off; 2403 sector_t recid; 2404 int status; 2405 2406 if (!dasd_page_cache) 2407 goto out; 2408 private = (struct dasd_eckd_private *) cqr->block->base->private; 2409 blksize = cqr->block->bp_block; 2410 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 2411 recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 2412 ccw = cqr->cpaddr; 2413 /* Skip over define extent & locate record. */ 2414 ccw++; 2415 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 2416 ccw++; 2417 rq_for_each_segment(bv, req, iter) { 2418 dst = page_address(bv->bv_page) + bv->bv_offset; 2419 for (off = 0; off < bv->bv_len; off += blksize) { 2420 /* Skip locate record. */ 2421 if (private->uses_cdl && recid <= 2*blk_per_trk) 2422 ccw++; 2423 if (dst) { 2424 if (ccw->flags & CCW_FLAG_IDA) 2425 cda = *((char **)((addr_t) ccw->cda)); 2426 else 2427 cda = (char *)((addr_t) ccw->cda); 2428 if (dst != cda) { 2429 if (rq_data_dir(req) == READ) 2430 memcpy(dst, cda, bv->bv_len); 2431 kmem_cache_free(dasd_page_cache, 2432 (void *)((addr_t)cda & PAGE_MASK)); 2433 } 2434 dst = NULL; 2435 } 2436 ccw++; 2437 recid++; 2438 } 2439 } 2440 out: 2441 status = cqr->status == DASD_CQR_DONE; 2442 dasd_sfree_request(cqr, cqr->memdev); 2443 return status; 2444 } 2445 2446 /* 2447 * Modify ccw/tcw in cqr so it can be started on a base device. 2448 * 2449 * Note that this is not enough to restart the cqr! 2450 * Either reset cqr->startdev as well (summary unit check handling) 2451 * or restart via separate cqr (as in ERP handling). 2452 */ 2453 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 2454 { 2455 struct ccw1 *ccw; 2456 struct PFX_eckd_data *pfxdata; 2457 struct tcw *tcw; 2458 struct tccb *tccb; 2459 struct dcw *dcw; 2460 2461 if (cqr->cpmode == 1) { 2462 tcw = cqr->cpaddr; 2463 tccb = tcw_get_tccb(tcw); 2464 dcw = (struct dcw *)&tccb->tca[0]; 2465 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 2466 pfxdata->validity.verify_base = 0; 2467 pfxdata->validity.hyper_pav = 0; 2468 } else { 2469 ccw = cqr->cpaddr; 2470 pfxdata = cqr->data; 2471 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 2472 pfxdata->validity.verify_base = 0; 2473 pfxdata->validity.hyper_pav = 0; 2474 } 2475 } 2476 } 2477 2478 #define DASD_ECKD_CHANQ_MAX_SIZE 4 2479 2480 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 2481 struct dasd_block *block, 2482 struct request *req) 2483 { 2484 struct dasd_eckd_private *private; 2485 struct dasd_device *startdev; 2486 unsigned long flags; 2487 struct dasd_ccw_req *cqr; 2488 2489 startdev = dasd_alias_get_start_dev(base); 2490 if (!startdev) 2491 startdev = base; 2492 private = (struct dasd_eckd_private *) startdev->private; 2493 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 2494 return ERR_PTR(-EBUSY); 2495 2496 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 2497 private->count++; 2498 cqr = dasd_eckd_build_cp(startdev, block, req); 2499 if (IS_ERR(cqr)) 2500 private->count--; 2501 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 2502 return cqr; 2503 } 2504 2505 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 2506 struct request *req) 2507 { 2508 struct dasd_eckd_private *private; 2509 unsigned long flags; 2510 2511 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 2512 private = (struct dasd_eckd_private *) cqr->memdev->private; 2513 private->count--; 2514 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 2515 return dasd_eckd_free_cp(cqr, req); 2516 } 2517 2518 static int 2519 dasd_eckd_fill_info(struct dasd_device * device, 2520 struct dasd_information2_t * info) 2521 { 2522 struct dasd_eckd_private *private; 2523 2524 private = (struct dasd_eckd_private *) device->private; 2525 info->label_block = 2; 2526 info->FBA_layout = private->uses_cdl ? 0 : 1; 2527 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 2528 info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 2529 memcpy(info->characteristics, &private->rdc_data, 2530 sizeof(struct dasd_eckd_characteristics)); 2531 info->confdata_size = min((unsigned long)private->conf_len, 2532 sizeof(info->configuration_data)); 2533 memcpy(info->configuration_data, private->conf_data, 2534 info->confdata_size); 2535 return 0; 2536 } 2537 2538 /* 2539 * SECTION: ioctl functions for eckd devices. 2540 */ 2541 2542 /* 2543 * Release device ioctl. 2544 * Buils a channel programm to releases a prior reserved 2545 * (see dasd_eckd_reserve) device. 2546 */ 2547 static int 2548 dasd_eckd_release(struct dasd_device *device) 2549 { 2550 struct dasd_ccw_req *cqr; 2551 int rc; 2552 struct ccw1 *ccw; 2553 2554 if (!capable(CAP_SYS_ADMIN)) 2555 return -EACCES; 2556 2557 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 2558 if (IS_ERR(cqr)) { 2559 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2560 "Could not allocate initialization request"); 2561 return PTR_ERR(cqr); 2562 } 2563 ccw = cqr->cpaddr; 2564 ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 2565 ccw->flags |= CCW_FLAG_SLI; 2566 ccw->count = 32; 2567 ccw->cda = (__u32)(addr_t) cqr->data; 2568 cqr->startdev = device; 2569 cqr->memdev = device; 2570 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 2571 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2572 cqr->retries = 2; /* set retry counter to enable basic ERP */ 2573 cqr->expires = 2 * HZ; 2574 cqr->buildclk = get_clock(); 2575 cqr->status = DASD_CQR_FILLED; 2576 2577 rc = dasd_sleep_on_immediatly(cqr); 2578 2579 dasd_sfree_request(cqr, cqr->memdev); 2580 return rc; 2581 } 2582 2583 /* 2584 * Reserve device ioctl. 2585 * Options are set to 'synchronous wait for interrupt' and 2586 * 'timeout the request'. This leads to a terminate IO if 2587 * the interrupt is outstanding for a certain time. 2588 */ 2589 static int 2590 dasd_eckd_reserve(struct dasd_device *device) 2591 { 2592 struct dasd_ccw_req *cqr; 2593 int rc; 2594 struct ccw1 *ccw; 2595 2596 if (!capable(CAP_SYS_ADMIN)) 2597 return -EACCES; 2598 2599 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 2600 if (IS_ERR(cqr)) { 2601 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2602 "Could not allocate initialization request"); 2603 return PTR_ERR(cqr); 2604 } 2605 ccw = cqr->cpaddr; 2606 ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 2607 ccw->flags |= CCW_FLAG_SLI; 2608 ccw->count = 32; 2609 ccw->cda = (__u32)(addr_t) cqr->data; 2610 cqr->startdev = device; 2611 cqr->memdev = device; 2612 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 2613 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2614 cqr->retries = 2; /* set retry counter to enable basic ERP */ 2615 cqr->expires = 2 * HZ; 2616 cqr->buildclk = get_clock(); 2617 cqr->status = DASD_CQR_FILLED; 2618 2619 rc = dasd_sleep_on_immediatly(cqr); 2620 2621 dasd_sfree_request(cqr, cqr->memdev); 2622 return rc; 2623 } 2624 2625 /* 2626 * Steal lock ioctl - unconditional reserve device. 2627 * Buils a channel programm to break a device's reservation. 2628 * (unconditional reserve) 2629 */ 2630 static int 2631 dasd_eckd_steal_lock(struct dasd_device *device) 2632 { 2633 struct dasd_ccw_req *cqr; 2634 int rc; 2635 struct ccw1 *ccw; 2636 2637 if (!capable(CAP_SYS_ADMIN)) 2638 return -EACCES; 2639 2640 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 2641 if (IS_ERR(cqr)) { 2642 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2643 "Could not allocate initialization request"); 2644 return PTR_ERR(cqr); 2645 } 2646 ccw = cqr->cpaddr; 2647 ccw->cmd_code = DASD_ECKD_CCW_SLCK; 2648 ccw->flags |= CCW_FLAG_SLI; 2649 ccw->count = 32; 2650 ccw->cda = (__u32)(addr_t) cqr->data; 2651 cqr->startdev = device; 2652 cqr->memdev = device; 2653 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 2654 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2655 cqr->retries = 2; /* set retry counter to enable basic ERP */ 2656 cqr->expires = 2 * HZ; 2657 cqr->buildclk = get_clock(); 2658 cqr->status = DASD_CQR_FILLED; 2659 2660 rc = dasd_sleep_on_immediatly(cqr); 2661 2662 dasd_sfree_request(cqr, cqr->memdev); 2663 return rc; 2664 } 2665 2666 /* 2667 * Read performance statistics 2668 */ 2669 static int 2670 dasd_eckd_performance(struct dasd_device *device, void __user *argp) 2671 { 2672 struct dasd_psf_prssd_data *prssdp; 2673 struct dasd_rssd_perf_stats_t *stats; 2674 struct dasd_ccw_req *cqr; 2675 struct ccw1 *ccw; 2676 int rc; 2677 2678 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 2679 (sizeof(struct dasd_psf_prssd_data) + 2680 sizeof(struct dasd_rssd_perf_stats_t)), 2681 device); 2682 if (IS_ERR(cqr)) { 2683 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2684 "Could not allocate initialization request"); 2685 return PTR_ERR(cqr); 2686 } 2687 cqr->startdev = device; 2688 cqr->memdev = device; 2689 cqr->retries = 0; 2690 cqr->expires = 10 * HZ; 2691 2692 /* Prepare for Read Subsystem Data */ 2693 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 2694 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 2695 prssdp->order = PSF_ORDER_PRSSD; 2696 prssdp->suborder = 0x01; /* Performance Statistics */ 2697 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 2698 2699 ccw = cqr->cpaddr; 2700 ccw->cmd_code = DASD_ECKD_CCW_PSF; 2701 ccw->count = sizeof(struct dasd_psf_prssd_data); 2702 ccw->flags |= CCW_FLAG_CC; 2703 ccw->cda = (__u32)(addr_t) prssdp; 2704 2705 /* Read Subsystem Data - Performance Statistics */ 2706 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 2707 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 2708 2709 ccw++; 2710 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 2711 ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 2712 ccw->cda = (__u32)(addr_t) stats; 2713 2714 cqr->buildclk = get_clock(); 2715 cqr->status = DASD_CQR_FILLED; 2716 rc = dasd_sleep_on(cqr); 2717 if (rc == 0) { 2718 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 2719 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 2720 if (copy_to_user(argp, stats, 2721 sizeof(struct dasd_rssd_perf_stats_t))) 2722 rc = -EFAULT; 2723 } 2724 dasd_sfree_request(cqr, cqr->memdev); 2725 return rc; 2726 } 2727 2728 /* 2729 * Get attributes (cache operations) 2730 * Returnes the cache attributes used in Define Extend (DE). 2731 */ 2732 static int 2733 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 2734 { 2735 struct dasd_eckd_private *private = 2736 (struct dasd_eckd_private *)device->private; 2737 struct attrib_data_t attrib = private->attrib; 2738 int rc; 2739 2740 if (!capable(CAP_SYS_ADMIN)) 2741 return -EACCES; 2742 if (!argp) 2743 return -EINVAL; 2744 2745 rc = 0; 2746 if (copy_to_user(argp, (long *) &attrib, 2747 sizeof(struct attrib_data_t))) 2748 rc = -EFAULT; 2749 2750 return rc; 2751 } 2752 2753 /* 2754 * Set attributes (cache operations) 2755 * Stores the attributes for cache operation to be used in Define Extend (DE). 2756 */ 2757 static int 2758 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 2759 { 2760 struct dasd_eckd_private *private = 2761 (struct dasd_eckd_private *)device->private; 2762 struct attrib_data_t attrib; 2763 2764 if (!capable(CAP_SYS_ADMIN)) 2765 return -EACCES; 2766 if (!argp) 2767 return -EINVAL; 2768 2769 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 2770 return -EFAULT; 2771 private->attrib = attrib; 2772 2773 dev_info(&device->cdev->dev, 2774 "The DASD cache mode was set to %x (%i cylinder prestage)\n", 2775 private->attrib.operation, private->attrib.nr_cyl); 2776 return 0; 2777 } 2778 2779 /* 2780 * Issue syscall I/O to EMC Symmetrix array. 2781 * CCWs are PSF and RSSD 2782 */ 2783 static int dasd_symm_io(struct dasd_device *device, void __user *argp) 2784 { 2785 struct dasd_symmio_parms usrparm; 2786 char *psf_data, *rssd_result; 2787 struct dasd_ccw_req *cqr; 2788 struct ccw1 *ccw; 2789 int rc; 2790 2791 /* Copy parms from caller */ 2792 rc = -EFAULT; 2793 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 2794 goto out; 2795 #ifndef CONFIG_64BIT 2796 /* Make sure pointers are sane even on 31 bit. */ 2797 if ((usrparm.psf_data >> 32) != 0 || (usrparm.rssd_result >> 32) != 0) { 2798 rc = -EINVAL; 2799 goto out; 2800 } 2801 #endif 2802 /* alloc I/O data area */ 2803 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 2804 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 2805 if (!psf_data || !rssd_result) { 2806 rc = -ENOMEM; 2807 goto out_free; 2808 } 2809 2810 /* get syscall header from user space */ 2811 rc = -EFAULT; 2812 if (copy_from_user(psf_data, 2813 (void __user *)(unsigned long) usrparm.psf_data, 2814 usrparm.psf_data_len)) 2815 goto out_free; 2816 2817 /* sanity check on syscall header */ 2818 if (psf_data[0] != 0x17 && psf_data[1] != 0xce) { 2819 rc = -EINVAL; 2820 goto out_free; 2821 } 2822 2823 /* setup CCWs for PSF + RSSD */ 2824 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 2825 if (IS_ERR(cqr)) { 2826 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2827 "Could not allocate initialization request"); 2828 rc = PTR_ERR(cqr); 2829 goto out_free; 2830 } 2831 2832 cqr->startdev = device; 2833 cqr->memdev = device; 2834 cqr->retries = 3; 2835 cqr->expires = 10 * HZ; 2836 cqr->buildclk = get_clock(); 2837 cqr->status = DASD_CQR_FILLED; 2838 2839 /* Build the ccws */ 2840 ccw = cqr->cpaddr; 2841 2842 /* PSF ccw */ 2843 ccw->cmd_code = DASD_ECKD_CCW_PSF; 2844 ccw->count = usrparm.psf_data_len; 2845 ccw->flags |= CCW_FLAG_CC; 2846 ccw->cda = (__u32)(addr_t) psf_data; 2847 2848 ccw++; 2849 2850 /* RSSD ccw */ 2851 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 2852 ccw->count = usrparm.rssd_result_len; 2853 ccw->flags = CCW_FLAG_SLI ; 2854 ccw->cda = (__u32)(addr_t) rssd_result; 2855 2856 rc = dasd_sleep_on(cqr); 2857 if (rc) 2858 goto out_sfree; 2859 2860 rc = -EFAULT; 2861 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 2862 rssd_result, usrparm.rssd_result_len)) 2863 goto out_sfree; 2864 rc = 0; 2865 2866 out_sfree: 2867 dasd_sfree_request(cqr, cqr->memdev); 2868 out_free: 2869 kfree(rssd_result); 2870 kfree(psf_data); 2871 out: 2872 DBF_DEV_EVENT(DBF_WARNING, device, "Symmetrix ioctl: rc=%d", rc); 2873 return rc; 2874 } 2875 2876 static int 2877 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 2878 { 2879 struct dasd_device *device = block->base; 2880 2881 switch (cmd) { 2882 case BIODASDGATTR: 2883 return dasd_eckd_get_attrib(device, argp); 2884 case BIODASDSATTR: 2885 return dasd_eckd_set_attrib(device, argp); 2886 case BIODASDPSRD: 2887 return dasd_eckd_performance(device, argp); 2888 case BIODASDRLSE: 2889 return dasd_eckd_release(device); 2890 case BIODASDRSRV: 2891 return dasd_eckd_reserve(device); 2892 case BIODASDSLCK: 2893 return dasd_eckd_steal_lock(device); 2894 case BIODASDSYMMIO: 2895 return dasd_symm_io(device, argp); 2896 default: 2897 return -ENOIOCTLCMD; 2898 } 2899 } 2900 2901 /* 2902 * Dump the range of CCWs into 'page' buffer 2903 * and return number of printed chars. 2904 */ 2905 static int 2906 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 2907 { 2908 int len, count; 2909 char *datap; 2910 2911 len = 0; 2912 while (from <= to) { 2913 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 2914 " CCW %p: %08X %08X DAT:", 2915 from, ((int *) from)[0], ((int *) from)[1]); 2916 2917 /* get pointer to data (consider IDALs) */ 2918 if (from->flags & CCW_FLAG_IDA) 2919 datap = (char *) *((addr_t *) (addr_t) from->cda); 2920 else 2921 datap = (char *) ((addr_t) from->cda); 2922 2923 /* dump data (max 32 bytes) */ 2924 for (count = 0; count < from->count && count < 32; count++) { 2925 if (count % 8 == 0) len += sprintf(page + len, " "); 2926 if (count % 4 == 0) len += sprintf(page + len, " "); 2927 len += sprintf(page + len, "%02x", datap[count]); 2928 } 2929 len += sprintf(page + len, "\n"); 2930 from++; 2931 } 2932 return len; 2933 } 2934 2935 static void 2936 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 2937 char *reason) 2938 { 2939 u64 *sense; 2940 2941 sense = (u64 *) dasd_get_sense(irb); 2942 if (sense) { 2943 DBF_DEV_EVENT(DBF_EMERG, device, 2944 "%s: %s %02x%02x%02x %016llx %016llx %016llx " 2945 "%016llx", reason, 2946 scsw_is_tm(&irb->scsw) ? "t" : "c", 2947 scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw), 2948 scsw_dstat(&irb->scsw), sense[0], sense[1], 2949 sense[2], sense[3]); 2950 } else { 2951 DBF_DEV_EVENT(DBF_EMERG, device, "%s", 2952 "SORRY - NO VALID SENSE AVAILABLE\n"); 2953 } 2954 } 2955 2956 /* 2957 * Print sense data and related channel program. 2958 * Parts are printed because printk buffer is only 1024 bytes. 2959 */ 2960 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 2961 struct dasd_ccw_req *req, struct irb *irb) 2962 { 2963 char *page; 2964 struct ccw1 *first, *last, *fail, *from, *to; 2965 int len, sl, sct; 2966 2967 page = (char *) get_zeroed_page(GFP_ATOMIC); 2968 if (page == NULL) { 2969 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2970 "No memory to dump sense data\n"); 2971 return; 2972 } 2973 /* dump the sense data */ 2974 len = sprintf(page, KERN_ERR PRINTK_HEADER 2975 " I/O status report for device %s:\n", 2976 dev_name(&device->cdev->dev)); 2977 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 2978 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n", 2979 req, scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw), 2980 scsw_cc(&irb->scsw), req->intrc); 2981 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 2982 " device %s: Failing CCW: %p\n", 2983 dev_name(&device->cdev->dev), 2984 (void *) (addr_t) irb->scsw.cmd.cpa); 2985 if (irb->esw.esw0.erw.cons) { 2986 for (sl = 0; sl < 4; sl++) { 2987 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 2988 " Sense(hex) %2d-%2d:", 2989 (8 * sl), ((8 * sl) + 7)); 2990 2991 for (sct = 0; sct < 8; sct++) { 2992 len += sprintf(page + len, " %02x", 2993 irb->ecw[8 * sl + sct]); 2994 } 2995 len += sprintf(page + len, "\n"); 2996 } 2997 2998 if (irb->ecw[27] & DASD_SENSE_BIT_0) { 2999 /* 24 Byte Sense Data */ 3000 sprintf(page + len, KERN_ERR PRINTK_HEADER 3001 " 24 Byte: %x MSG %x, " 3002 "%s MSGb to SYSOP\n", 3003 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 3004 irb->ecw[1] & 0x10 ? "" : "no"); 3005 } else { 3006 /* 32 Byte Sense Data */ 3007 sprintf(page + len, KERN_ERR PRINTK_HEADER 3008 " 32 Byte: Format: %x " 3009 "Exception class %x\n", 3010 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 3011 } 3012 } else { 3013 sprintf(page + len, KERN_ERR PRINTK_HEADER 3014 " SORRY - NO VALID SENSE AVAILABLE\n"); 3015 } 3016 printk("%s", page); 3017 3018 if (req) { 3019 /* req == NULL for unsolicited interrupts */ 3020 /* dump the Channel Program (max 140 Bytes per line) */ 3021 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3022 first = req->cpaddr; 3023 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3024 to = min(first + 6, last); 3025 len = sprintf(page, KERN_ERR PRINTK_HEADER 3026 " Related CP in req: %p\n", req); 3027 dasd_eckd_dump_ccw_range(first, to, page + len); 3028 printk("%s", page); 3029 3030 /* print failing CCW area (maximum 4) */ 3031 /* scsw->cda is either valid or zero */ 3032 len = 0; 3033 from = ++to; 3034 fail = (struct ccw1 *)(addr_t) 3035 irb->scsw.cmd.cpa; /* failing CCW */ 3036 if (from < fail - 2) { 3037 from = fail - 2; /* there is a gap - print header */ 3038 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 3039 } 3040 to = min(fail + 1, last); 3041 len += dasd_eckd_dump_ccw_range(from, to, page + len); 3042 3043 /* print last CCWs (maximum 2) */ 3044 from = max(from, ++to); 3045 if (from < last - 1) { 3046 from = last - 1; /* there is a gap - print header */ 3047 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 3048 } 3049 len += dasd_eckd_dump_ccw_range(from, last, page + len); 3050 if (len > 0) 3051 printk("%s", page); 3052 } 3053 free_page((unsigned long) page); 3054 } 3055 3056 3057 /* 3058 * Print sense data from a tcw. 3059 */ 3060 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 3061 struct dasd_ccw_req *req, struct irb *irb) 3062 { 3063 char *page; 3064 int len, sl, sct, residual; 3065 3066 struct tsb *tsb; 3067 u8 *sense; 3068 3069 3070 page = (char *) get_zeroed_page(GFP_ATOMIC); 3071 if (page == NULL) { 3072 DBF_DEV_EVENT(DBF_WARNING, device, " %s", 3073 "No memory to dump sense data"); 3074 return; 3075 } 3076 /* dump the sense data */ 3077 len = sprintf(page, KERN_ERR PRINTK_HEADER 3078 " I/O status report for device %s:\n", 3079 dev_name(&device->cdev->dev)); 3080 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3081 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d " 3082 "fcxs: 0x%02X schxs: 0x%02X\n", req, 3083 scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw), 3084 scsw_cc(&irb->scsw), req->intrc, 3085 irb->scsw.tm.fcxs, irb->scsw.tm.schxs); 3086 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3087 " device %s: Failing TCW: %p\n", 3088 dev_name(&device->cdev->dev), 3089 (void *) (addr_t) irb->scsw.tm.tcw); 3090 3091 tsb = NULL; 3092 sense = NULL; 3093 if (irb->scsw.tm.tcw) 3094 tsb = tcw_get_tsb( 3095 (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 3096 3097 if (tsb && (irb->scsw.tm.fcxs == 0x01)) { 3098 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3099 " tsb->length %d\n", tsb->length); 3100 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3101 " tsb->flags %x\n", tsb->flags); 3102 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3103 " tsb->dcw_offset %d\n", tsb->dcw_offset); 3104 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3105 " tsb->count %d\n", tsb->count); 3106 residual = tsb->count - 28; 3107 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3108 " residual %d\n", residual); 3109 3110 switch (tsb->flags & 0x07) { 3111 case 1: /* tsa_iostat */ 3112 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3113 " tsb->tsa.iostat.dev_time %d\n", 3114 tsb->tsa.iostat.dev_time); 3115 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3116 " tsb->tsa.iostat.def_time %d\n", 3117 tsb->tsa.iostat.def_time); 3118 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3119 " tsb->tsa.iostat.queue_time %d\n", 3120 tsb->tsa.iostat.queue_time); 3121 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3122 " tsb->tsa.iostat.dev_busy_time %d\n", 3123 tsb->tsa.iostat.dev_busy_time); 3124 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3125 " tsb->tsa.iostat.dev_act_time %d\n", 3126 tsb->tsa.iostat.dev_act_time); 3127 sense = tsb->tsa.iostat.sense; 3128 break; 3129 case 2: /* ts_ddpc */ 3130 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3131 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 3132 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3133 " tsb->tsa.ddpc.rcq: "); 3134 for (sl = 0; sl < 16; sl++) { 3135 for (sct = 0; sct < 8; sct++) { 3136 len += sprintf(page + len, " %02x", 3137 tsb->tsa.ddpc.rcq[sl]); 3138 } 3139 len += sprintf(page + len, "\n"); 3140 } 3141 sense = tsb->tsa.ddpc.sense; 3142 break; 3143 case 3: /* tsa_intrg */ 3144 len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3145 " tsb->tsa.intrg.: not supportet yet \n"); 3146 break; 3147 } 3148 3149 if (sense) { 3150 for (sl = 0; sl < 4; sl++) { 3151 len += sprintf(page + len, 3152 KERN_ERR PRINTK_HEADER 3153 " Sense(hex) %2d-%2d:", 3154 (8 * sl), ((8 * sl) + 7)); 3155 for (sct = 0; sct < 8; sct++) { 3156 len += sprintf(page + len, " %02x", 3157 sense[8 * sl + sct]); 3158 } 3159 len += sprintf(page + len, "\n"); 3160 } 3161 3162 if (sense[27] & DASD_SENSE_BIT_0) { 3163 /* 24 Byte Sense Data */ 3164 sprintf(page + len, KERN_ERR PRINTK_HEADER 3165 " 24 Byte: %x MSG %x, " 3166 "%s MSGb to SYSOP\n", 3167 sense[7] >> 4, sense[7] & 0x0f, 3168 sense[1] & 0x10 ? "" : "no"); 3169 } else { 3170 /* 32 Byte Sense Data */ 3171 sprintf(page + len, KERN_ERR PRINTK_HEADER 3172 " 32 Byte: Format: %x " 3173 "Exception class %x\n", 3174 sense[6] & 0x0f, sense[22] >> 4); 3175 } 3176 } else { 3177 sprintf(page + len, KERN_ERR PRINTK_HEADER 3178 " SORRY - NO VALID SENSE AVAILABLE\n"); 3179 } 3180 } else { 3181 sprintf(page + len, KERN_ERR PRINTK_HEADER 3182 " SORRY - NO TSB DATA AVAILABLE\n"); 3183 } 3184 printk("%s", page); 3185 free_page((unsigned long) page); 3186 } 3187 3188 static void dasd_eckd_dump_sense(struct dasd_device *device, 3189 struct dasd_ccw_req *req, struct irb *irb) 3190 { 3191 if (req && scsw_is_tm(&req->irb.scsw)) 3192 dasd_eckd_dump_sense_tcw(device, req, irb); 3193 else 3194 dasd_eckd_dump_sense_ccw(device, req, irb); 3195 } 3196 3197 int dasd_eckd_pm_freeze(struct dasd_device *device) 3198 { 3199 /* 3200 * the device should be disconnected from our LCU structure 3201 * on restore we will reconnect it and reread LCU specific 3202 * information like PAV support that might have changed 3203 */ 3204 dasd_alias_remove_device(device); 3205 dasd_alias_disconnect_device_from_lcu(device); 3206 3207 return 0; 3208 } 3209 3210 int dasd_eckd_restore_device(struct dasd_device *device) 3211 { 3212 struct dasd_eckd_private *private; 3213 int is_known, rc; 3214 struct dasd_uid temp_uid; 3215 3216 private = (struct dasd_eckd_private *) device->private; 3217 3218 /* Read Configuration Data */ 3219 rc = dasd_eckd_read_conf(device); 3220 if (rc) 3221 goto out_err; 3222 3223 /* Generate device unique id and register in devmap */ 3224 rc = dasd_eckd_generate_uid(device, &private->uid); 3225 dasd_get_uid(device->cdev, &temp_uid); 3226 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 3227 dev_err(&device->cdev->dev, "The UID of the DASD has changed\n"); 3228 if (rc) 3229 goto out_err; 3230 dasd_set_uid(device->cdev, &private->uid); 3231 3232 /* register lcu with alias handling, enable PAV if this is a new lcu */ 3233 is_known = dasd_alias_make_device_known_to_lcu(device); 3234 if (is_known < 0) 3235 return is_known; 3236 if (!is_known) { 3237 /* new lcu found */ 3238 rc = dasd_eckd_validate_server(device); /* will switch pav on */ 3239 if (rc) 3240 goto out_err; 3241 } 3242 3243 /* Read Feature Codes */ 3244 rc = dasd_eckd_read_features(device); 3245 if (rc) 3246 goto out_err; 3247 3248 /* Read Device Characteristics */ 3249 memset(&private->rdc_data, 0, sizeof(private->rdc_data)); 3250 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 3251 &private->rdc_data, 64); 3252 if (rc) { 3253 DBF_EVENT(DBF_WARNING, 3254 "Read device characteristics failed, rc=%d for " 3255 "device: %s", rc, dev_name(&device->cdev->dev)); 3256 goto out_err; 3257 } 3258 3259 /* add device to alias management */ 3260 dasd_alias_add_device(device); 3261 3262 return 0; 3263 3264 out_err: 3265 return -1; 3266 } 3267 3268 static struct ccw_driver dasd_eckd_driver = { 3269 .name = "dasd-eckd", 3270 .owner = THIS_MODULE, 3271 .ids = dasd_eckd_ids, 3272 .probe = dasd_eckd_probe, 3273 .remove = dasd_generic_remove, 3274 .set_offline = dasd_generic_set_offline, 3275 .set_online = dasd_eckd_set_online, 3276 .notify = dasd_generic_notify, 3277 .freeze = dasd_generic_pm_freeze, 3278 .thaw = dasd_generic_restore_device, 3279 .restore = dasd_generic_restore_device, 3280 }; 3281 3282 /* 3283 * max_blocks is dependent on the amount of storage that is available 3284 * in the static io buffer for each device. Currently each device has 3285 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 3286 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 3287 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 3288 * addition we have one define extent ccw + 16 bytes of data and one 3289 * locate record ccw + 16 bytes of data. That makes: 3290 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 3291 * We want to fit two into the available memory so that we can immediately 3292 * start the next request if one finishes off. That makes 249.5 blocks 3293 * for one request. Give a little safety and the result is 240. 3294 */ 3295 static struct dasd_discipline dasd_eckd_discipline = { 3296 .owner = THIS_MODULE, 3297 .name = "ECKD", 3298 .ebcname = "ECKD", 3299 .max_blocks = 240, 3300 .check_device = dasd_eckd_check_characteristics, 3301 .uncheck_device = dasd_eckd_uncheck_device, 3302 .do_analysis = dasd_eckd_do_analysis, 3303 .ready_to_online = dasd_eckd_ready_to_online, 3304 .online_to_ready = dasd_eckd_online_to_ready, 3305 .fill_geometry = dasd_eckd_fill_geometry, 3306 .start_IO = dasd_start_IO, 3307 .term_IO = dasd_term_IO, 3308 .handle_terminated_request = dasd_eckd_handle_terminated_request, 3309 .format_device = dasd_eckd_format_device, 3310 .erp_action = dasd_eckd_erp_action, 3311 .erp_postaction = dasd_eckd_erp_postaction, 3312 .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt, 3313 .build_cp = dasd_eckd_build_alias_cp, 3314 .free_cp = dasd_eckd_free_alias_cp, 3315 .dump_sense = dasd_eckd_dump_sense, 3316 .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 3317 .fill_info = dasd_eckd_fill_info, 3318 .ioctl = dasd_eckd_ioctl, 3319 .freeze = dasd_eckd_pm_freeze, 3320 .restore = dasd_eckd_restore_device, 3321 }; 3322 3323 static int __init 3324 dasd_eckd_init(void) 3325 { 3326 int ret; 3327 3328 ASCEBC(dasd_eckd_discipline.ebcname, 4); 3329 ret = ccw_driver_register(&dasd_eckd_driver); 3330 if (!ret) 3331 wait_for_device_probe(); 3332 3333 return ret; 3334 } 3335 3336 static void __exit 3337 dasd_eckd_cleanup(void) 3338 { 3339 ccw_driver_unregister(&dasd_eckd_driver); 3340 } 3341 3342 module_init(dasd_eckd_init); 3343 module_exit(dasd_eckd_cleanup); 3344