1 // SPDX-License-Identifier: GPL-2.0 2 /* 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 #include <linux/stddef.h> 14 #include <linux/kernel.h> 15 #include <linux/slab.h> 16 #include <linux/hdreg.h> /* HDIO_GETGEO */ 17 #include <linux/bio.h> 18 #include <linux/module.h> 19 #include <linux/compat.h> 20 #include <linux/init.h> 21 #include <linux/seq_file.h> 22 #include <linux/uaccess.h> 23 #include <linux/io.h> 24 25 #include <asm/css_chars.h> 26 #include <asm/debug.h> 27 #include <asm/idals.h> 28 #include <asm/ebcdic.h> 29 #include <asm/cio.h> 30 #include <asm/ccwdev.h> 31 #include <asm/itcw.h> 32 #include <asm/schid.h> 33 #include <asm/chpid.h> 34 35 #include "dasd_int.h" 36 #include "dasd_eckd.h" 37 38 /* 39 * raw track access always map to 64k in memory 40 * so it maps to 16 blocks of 4k per track 41 */ 42 #define DASD_RAW_BLOCK_PER_TRACK 16 43 #define DASD_RAW_BLOCKSIZE 4096 44 /* 64k are 128 x 512 byte sectors */ 45 #define DASD_RAW_SECTORS_PER_TRACK 128 46 47 MODULE_DESCRIPTION("S/390 DASD ECKD Disks device driver"); 48 MODULE_LICENSE("GPL"); 49 50 static struct dasd_discipline dasd_eckd_discipline; 51 52 /* The ccw bus type uses this table to find devices that it sends to 53 * dasd_eckd_probe */ 54 static struct ccw_device_id dasd_eckd_ids[] = { 55 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 56 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 57 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 58 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 59 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 60 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 61 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 62 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 63 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 64 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 65 { /* end of list */ }, 66 }; 67 68 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 69 70 static struct ccw_driver dasd_eckd_driver; /* see below */ 71 72 static void *rawpadpage; 73 74 #define INIT_CQR_OK 0 75 #define INIT_CQR_UNFORMATTED 1 76 #define INIT_CQR_ERROR 2 77 78 /* emergency request for reserve/release */ 79 static struct { 80 struct dasd_ccw_req cqr; 81 struct ccw1 ccw; 82 char data[32]; 83 } *dasd_reserve_req; 84 static DEFINE_MUTEX(dasd_reserve_mutex); 85 86 static struct { 87 struct dasd_ccw_req cqr; 88 struct ccw1 ccw[2]; 89 char data[40]; 90 } *dasd_vol_info_req; 91 static DEFINE_MUTEX(dasd_vol_info_mutex); 92 93 struct ext_pool_exhaust_work_data { 94 struct work_struct worker; 95 struct dasd_device *device; 96 struct dasd_device *base; 97 }; 98 99 /* definitions for the path verification worker */ 100 struct pe_handler_work_data { 101 struct work_struct worker; 102 struct dasd_device *device; 103 struct dasd_ccw_req cqr; 104 struct ccw1 ccw; 105 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 106 int isglobal; 107 __u8 tbvpm; 108 __u8 fcsecpm; 109 }; 110 static struct pe_handler_work_data *pe_handler_worker; 111 static DEFINE_MUTEX(dasd_pe_handler_mutex); 112 113 struct check_attention_work_data { 114 struct work_struct worker; 115 struct dasd_device *device; 116 __u8 lpum; 117 }; 118 119 static int dasd_eckd_ext_pool_id(struct dasd_device *); 120 static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, 121 struct dasd_device *, struct dasd_device *, 122 unsigned int, int, unsigned int, unsigned int, 123 unsigned int, unsigned int); 124 static int dasd_eckd_query_pprc_status(struct dasd_device *, 125 struct dasd_pprc_data_sc4 *); 126 127 /* initial attempt at a probe function. this can be simplified once 128 * the other detection code is gone */ 129 static int dasd_eckd_probe(struct ccw_device * cdev)130 dasd_eckd_probe (struct ccw_device *cdev) 131 { 132 int ret; 133 134 /* set ECKD specific ccw-device options */ 135 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 136 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 137 if (ret) { 138 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 139 "dasd_eckd_probe: could not set " 140 "ccw-device options"); 141 return ret; 142 } 143 ret = dasd_generic_probe(cdev); 144 return ret; 145 } 146 147 static int dasd_eckd_set_online(struct ccw_device * cdev)148 dasd_eckd_set_online(struct ccw_device *cdev) 149 { 150 return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 151 } 152 153 static const int sizes_trk0[] = { 28, 148, 84 }; 154 #define LABEL_SIZE 140 155 156 /* head and record addresses of count_area read in analysis ccw */ 157 static const int count_area_head[] = { 0, 0, 0, 0, 1 }; 158 static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 159 160 static inline unsigned int ceil_quot(unsigned int d1,unsigned int d2)161 ceil_quot(unsigned int d1, unsigned int d2) 162 { 163 return (d1 + (d2 - 1)) / d2; 164 } 165 166 static unsigned int recs_per_track(struct dasd_eckd_characteristics * rdc,unsigned int kl,unsigned int dl)167 recs_per_track(struct dasd_eckd_characteristics * rdc, 168 unsigned int kl, unsigned int dl) 169 { 170 int dn, kn; 171 172 switch (rdc->dev_type) { 173 case 0x3380: 174 if (kl) 175 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 176 ceil_quot(dl + 12, 32)); 177 else 178 return 1499 / (15 + ceil_quot(dl + 12, 32)); 179 case 0x3390: 180 dn = ceil_quot(dl + 6, 232) + 1; 181 if (kl) { 182 kn = ceil_quot(kl + 6, 232) + 1; 183 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 184 9 + ceil_quot(dl + 6 * dn, 34)); 185 } else 186 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 187 case 0x9345: 188 dn = ceil_quot(dl + 6, 232) + 1; 189 if (kl) { 190 kn = ceil_quot(kl + 6, 232) + 1; 191 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 192 ceil_quot(dl + 6 * dn, 34)); 193 } else 194 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 195 } 196 return 0; 197 } 198 set_ch_t(struct ch_t * geo,__u32 cyl,__u8 head)199 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 200 { 201 geo->cyl = (__u16) cyl; 202 geo->head = cyl >> 16; 203 geo->head <<= 4; 204 geo->head |= head; 205 } 206 207 /* 208 * calculate failing track from sense data depending if 209 * it is an EAV device or not 210 */ dasd_eckd_track_from_irb(struct irb * irb,struct dasd_device * device,sector_t * track)211 static int dasd_eckd_track_from_irb(struct irb *irb, struct dasd_device *device, 212 sector_t *track) 213 { 214 struct dasd_eckd_private *private = device->private; 215 u8 *sense = NULL; 216 u32 cyl; 217 u8 head; 218 219 sense = dasd_get_sense(irb); 220 if (!sense) { 221 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 222 "ESE error no sense data\n"); 223 return -EINVAL; 224 } 225 if (!(sense[27] & DASD_SENSE_BIT_2)) { 226 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 227 "ESE error no valid track data\n"); 228 return -EINVAL; 229 } 230 231 if (sense[27] & DASD_SENSE_BIT_3) { 232 /* enhanced addressing */ 233 cyl = sense[30] << 20; 234 cyl |= (sense[31] & 0xF0) << 12; 235 cyl |= sense[28] << 8; 236 cyl |= sense[29]; 237 } else { 238 cyl = sense[29] << 8; 239 cyl |= sense[30]; 240 } 241 head = sense[31] & 0x0F; 242 *track = cyl * private->rdc_data.trk_per_cyl + head; 243 return 0; 244 } 245 set_timestamp(struct ccw1 * ccw,struct DE_eckd_data * data,struct dasd_device * device)246 static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data, 247 struct dasd_device *device) 248 { 249 struct dasd_eckd_private *private = device->private; 250 int rc; 251 252 rc = get_phys_clock(&data->ep_sys_time); 253 /* 254 * Ignore return code if XRC is not supported or 255 * sync clock is switched off 256 */ 257 if ((rc && !private->rdc_data.facilities.XRC_supported) || 258 rc == -EOPNOTSUPP || rc == -EACCES) 259 return 0; 260 261 /* switch on System Time Stamp - needed for XRC Support */ 262 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 263 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 264 265 if (ccw) { 266 ccw->count = sizeof(struct DE_eckd_data); 267 ccw->flags |= CCW_FLAG_SLI; 268 } 269 270 return rc; 271 } 272 273 static int define_extent(struct ccw1 * ccw,struct DE_eckd_data * data,unsigned int trk,unsigned int totrk,int cmd,struct dasd_device * device,int blksize)274 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 275 unsigned int totrk, int cmd, struct dasd_device *device, 276 int blksize) 277 { 278 struct dasd_eckd_private *private = device->private; 279 u16 heads, beghead, endhead; 280 u32 begcyl, endcyl; 281 int rc = 0; 282 283 if (ccw) { 284 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 285 ccw->flags = 0; 286 ccw->count = 16; 287 ccw->cda = virt_to_dma32(data); 288 } 289 290 memset(data, 0, sizeof(struct DE_eckd_data)); 291 switch (cmd) { 292 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 293 case DASD_ECKD_CCW_READ_RECORD_ZERO: 294 case DASD_ECKD_CCW_READ: 295 case DASD_ECKD_CCW_READ_MT: 296 case DASD_ECKD_CCW_READ_CKD: 297 case DASD_ECKD_CCW_READ_CKD_MT: 298 case DASD_ECKD_CCW_READ_KD: 299 case DASD_ECKD_CCW_READ_KD_MT: 300 data->mask.perm = 0x1; 301 data->attributes.operation = private->attrib.operation; 302 break; 303 case DASD_ECKD_CCW_READ_COUNT: 304 data->mask.perm = 0x1; 305 data->attributes.operation = DASD_BYPASS_CACHE; 306 break; 307 case DASD_ECKD_CCW_READ_TRACK: 308 case DASD_ECKD_CCW_READ_TRACK_DATA: 309 data->mask.perm = 0x1; 310 data->attributes.operation = private->attrib.operation; 311 data->blk_size = 0; 312 break; 313 case DASD_ECKD_CCW_WRITE: 314 case DASD_ECKD_CCW_WRITE_MT: 315 case DASD_ECKD_CCW_WRITE_KD: 316 case DASD_ECKD_CCW_WRITE_KD_MT: 317 data->mask.perm = 0x02; 318 data->attributes.operation = private->attrib.operation; 319 rc = set_timestamp(ccw, data, device); 320 break; 321 case DASD_ECKD_CCW_WRITE_CKD: 322 case DASD_ECKD_CCW_WRITE_CKD_MT: 323 data->attributes.operation = DASD_BYPASS_CACHE; 324 rc = set_timestamp(ccw, data, device); 325 break; 326 case DASD_ECKD_CCW_ERASE: 327 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 328 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 329 data->mask.perm = 0x3; 330 data->mask.auth = 0x1; 331 data->attributes.operation = DASD_BYPASS_CACHE; 332 rc = set_timestamp(ccw, data, device); 333 break; 334 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 335 data->mask.perm = 0x03; 336 data->attributes.operation = private->attrib.operation; 337 data->blk_size = 0; 338 break; 339 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 340 data->mask.perm = 0x02; 341 data->attributes.operation = private->attrib.operation; 342 data->blk_size = blksize; 343 rc = set_timestamp(ccw, data, device); 344 break; 345 default: 346 dev_err(&device->cdev->dev, 347 "0x%x is not a known command\n", cmd); 348 break; 349 } 350 351 data->attributes.mode = 0x3; /* ECKD */ 352 353 if ((private->rdc_data.cu_type == 0x2105 || 354 private->rdc_data.cu_type == 0x2107 || 355 private->rdc_data.cu_type == 0x1750) 356 && !(private->uses_cdl && trk < 2)) 357 data->ga_extended |= 0x40; /* Regular Data Format Mode */ 358 359 heads = private->rdc_data.trk_per_cyl; 360 begcyl = trk / heads; 361 beghead = trk % heads; 362 endcyl = totrk / heads; 363 endhead = totrk % heads; 364 365 /* check for sequential prestage - enhance cylinder range */ 366 if (data->attributes.operation == DASD_SEQ_PRESTAGE || 367 data->attributes.operation == DASD_SEQ_ACCESS) { 368 369 if (endcyl + private->attrib.nr_cyl < private->real_cyl) 370 endcyl += private->attrib.nr_cyl; 371 else 372 endcyl = (private->real_cyl - 1); 373 } 374 375 set_ch_t(&data->beg_ext, begcyl, beghead); 376 set_ch_t(&data->end_ext, endcyl, endhead); 377 return rc; 378 } 379 380 locate_record_ext(struct ccw1 * ccw,struct LRE_eckd_data * data,unsigned int trk,unsigned int rec_on_trk,int count,int cmd,struct dasd_device * device,unsigned int reclen,unsigned int tlf)381 static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data, 382 unsigned int trk, unsigned int rec_on_trk, 383 int count, int cmd, struct dasd_device *device, 384 unsigned int reclen, unsigned int tlf) 385 { 386 struct dasd_eckd_private *private = device->private; 387 int sector; 388 int dn, d; 389 390 if (ccw) { 391 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT; 392 ccw->flags = 0; 393 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) 394 ccw->count = 22; 395 else 396 ccw->count = 20; 397 ccw->cda = virt_to_dma32(data); 398 } 399 400 memset(data, 0, sizeof(*data)); 401 sector = 0; 402 if (rec_on_trk) { 403 switch (private->rdc_data.dev_type) { 404 case 0x3390: 405 dn = ceil_quot(reclen + 6, 232); 406 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 407 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 408 break; 409 case 0x3380: 410 d = 7 + ceil_quot(reclen + 12, 32); 411 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 412 break; 413 } 414 } 415 data->sector = sector; 416 /* note: meaning of count depends on the operation 417 * for record based I/O it's the number of records, but for 418 * track based I/O it's the number of tracks 419 */ 420 data->count = count; 421 switch (cmd) { 422 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 423 data->operation.orientation = 0x3; 424 data->operation.operation = 0x03; 425 break; 426 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 427 data->operation.orientation = 0x3; 428 data->operation.operation = 0x16; 429 break; 430 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 431 data->operation.orientation = 0x1; 432 data->operation.operation = 0x03; 433 data->count++; 434 break; 435 case DASD_ECKD_CCW_READ_RECORD_ZERO: 436 data->operation.orientation = 0x3; 437 data->operation.operation = 0x16; 438 data->count++; 439 break; 440 case DASD_ECKD_CCW_WRITE: 441 case DASD_ECKD_CCW_WRITE_MT: 442 case DASD_ECKD_CCW_WRITE_KD: 443 case DASD_ECKD_CCW_WRITE_KD_MT: 444 data->auxiliary.length_valid = 0x1; 445 data->length = reclen; 446 data->operation.operation = 0x01; 447 break; 448 case DASD_ECKD_CCW_WRITE_CKD: 449 case DASD_ECKD_CCW_WRITE_CKD_MT: 450 data->auxiliary.length_valid = 0x1; 451 data->length = reclen; 452 data->operation.operation = 0x03; 453 break; 454 case DASD_ECKD_CCW_WRITE_FULL_TRACK: 455 data->operation.orientation = 0x0; 456 data->operation.operation = 0x3F; 457 data->extended_operation = 0x11; 458 data->length = 0; 459 data->extended_parameter_length = 0x02; 460 if (data->count > 8) { 461 data->extended_parameter[0] = 0xFF; 462 data->extended_parameter[1] = 0xFF; 463 data->extended_parameter[1] <<= (16 - count); 464 } else { 465 data->extended_parameter[0] = 0xFF; 466 data->extended_parameter[0] <<= (8 - count); 467 data->extended_parameter[1] = 0x00; 468 } 469 data->sector = 0xFF; 470 break; 471 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 472 data->auxiliary.length_valid = 0x1; 473 data->length = reclen; /* not tlf, as one might think */ 474 data->operation.operation = 0x3F; 475 data->extended_operation = 0x23; 476 break; 477 case DASD_ECKD_CCW_READ: 478 case DASD_ECKD_CCW_READ_MT: 479 case DASD_ECKD_CCW_READ_KD: 480 case DASD_ECKD_CCW_READ_KD_MT: 481 data->auxiliary.length_valid = 0x1; 482 data->length = reclen; 483 data->operation.operation = 0x06; 484 break; 485 case DASD_ECKD_CCW_READ_CKD: 486 case DASD_ECKD_CCW_READ_CKD_MT: 487 data->auxiliary.length_valid = 0x1; 488 data->length = reclen; 489 data->operation.operation = 0x16; 490 break; 491 case DASD_ECKD_CCW_READ_COUNT: 492 data->operation.operation = 0x06; 493 break; 494 case DASD_ECKD_CCW_READ_TRACK: 495 data->operation.orientation = 0x1; 496 data->operation.operation = 0x0C; 497 data->extended_parameter_length = 0; 498 data->sector = 0xFF; 499 break; 500 case DASD_ECKD_CCW_READ_TRACK_DATA: 501 data->auxiliary.length_valid = 0x1; 502 data->length = tlf; 503 data->operation.operation = 0x0C; 504 break; 505 case DASD_ECKD_CCW_ERASE: 506 data->length = reclen; 507 data->auxiliary.length_valid = 0x1; 508 data->operation.operation = 0x0b; 509 break; 510 default: 511 DBF_DEV_EVENT(DBF_ERR, device, 512 "fill LRE unknown opcode 0x%x", cmd); 513 BUG(); 514 } 515 set_ch_t(&data->seek_addr, 516 trk / private->rdc_data.trk_per_cyl, 517 trk % private->rdc_data.trk_per_cyl); 518 data->search_arg.cyl = data->seek_addr.cyl; 519 data->search_arg.head = data->seek_addr.head; 520 data->search_arg.record = rec_on_trk; 521 } 522 prefix_LRE(struct ccw1 * ccw,struct PFX_eckd_data * pfxdata,unsigned int trk,unsigned int totrk,int cmd,struct dasd_device * basedev,struct dasd_device * startdev,unsigned int format,unsigned int rec_on_trk,int count,unsigned int blksize,unsigned int tlf)523 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 524 unsigned int trk, unsigned int totrk, int cmd, 525 struct dasd_device *basedev, struct dasd_device *startdev, 526 unsigned int format, unsigned int rec_on_trk, int count, 527 unsigned int blksize, unsigned int tlf) 528 { 529 struct dasd_eckd_private *basepriv, *startpriv; 530 struct LRE_eckd_data *lredata; 531 struct DE_eckd_data *dedata; 532 int rc = 0; 533 534 basepriv = basedev->private; 535 startpriv = startdev->private; 536 dedata = &pfxdata->define_extent; 537 lredata = &pfxdata->locate_record; 538 539 ccw->cmd_code = DASD_ECKD_CCW_PFX; 540 ccw->flags = 0; 541 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 542 ccw->count = sizeof(*pfxdata) + 2; 543 ccw->cda = virt_to_dma32(pfxdata); 544 memset(pfxdata, 0, sizeof(*pfxdata) + 2); 545 } else { 546 ccw->count = sizeof(*pfxdata); 547 ccw->cda = virt_to_dma32(pfxdata); 548 memset(pfxdata, 0, sizeof(*pfxdata)); 549 } 550 551 /* prefix data */ 552 if (format > 1) { 553 DBF_DEV_EVENT(DBF_ERR, basedev, 554 "PFX LRE unknown format 0x%x", format); 555 BUG(); 556 return -EINVAL; 557 } 558 pfxdata->format = format; 559 pfxdata->base_address = basepriv->conf.ned->unit_addr; 560 pfxdata->base_lss = basepriv->conf.ned->ID; 561 pfxdata->validity.define_extent = 1; 562 563 /* private uid is kept up to date, conf_data may be outdated */ 564 if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 565 pfxdata->validity.verify_base = 1; 566 567 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 568 pfxdata->validity.verify_base = 1; 569 pfxdata->validity.hyper_pav = 1; 570 } 571 572 rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize); 573 574 /* 575 * For some commands the System Time Stamp is set in the define extent 576 * data when XRC is supported. The validity of the time stamp must be 577 * reflected in the prefix data as well. 578 */ 579 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 580 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 581 582 if (format == 1) { 583 locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd, 584 basedev, blksize, tlf); 585 } 586 587 return rc; 588 } 589 prefix(struct ccw1 * ccw,struct PFX_eckd_data * pfxdata,unsigned int trk,unsigned int totrk,int cmd,struct dasd_device * basedev,struct dasd_device * startdev)590 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 591 unsigned int trk, unsigned int totrk, int cmd, 592 struct dasd_device *basedev, struct dasd_device *startdev) 593 { 594 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 595 0, 0, 0, 0, 0); 596 } 597 598 static void locate_record(struct ccw1 * ccw,struct LO_eckd_data * data,unsigned int trk,unsigned int rec_on_trk,int no_rec,int cmd,struct dasd_device * device,int reclen)599 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 600 unsigned int rec_on_trk, int no_rec, int cmd, 601 struct dasd_device * device, int reclen) 602 { 603 struct dasd_eckd_private *private = device->private; 604 int sector; 605 int dn, d; 606 607 DBF_DEV_EVENT(DBF_INFO, device, 608 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 609 trk, rec_on_trk, no_rec, cmd, reclen); 610 611 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 612 ccw->flags = 0; 613 ccw->count = 16; 614 ccw->cda = virt_to_dma32(data); 615 616 memset(data, 0, sizeof(struct LO_eckd_data)); 617 sector = 0; 618 if (rec_on_trk) { 619 switch (private->rdc_data.dev_type) { 620 case 0x3390: 621 dn = ceil_quot(reclen + 6, 232); 622 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 623 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 624 break; 625 case 0x3380: 626 d = 7 + ceil_quot(reclen + 12, 32); 627 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 628 break; 629 } 630 } 631 data->sector = sector; 632 data->count = no_rec; 633 switch (cmd) { 634 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 635 data->operation.orientation = 0x3; 636 data->operation.operation = 0x03; 637 break; 638 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 639 data->operation.orientation = 0x3; 640 data->operation.operation = 0x16; 641 break; 642 case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 643 data->operation.orientation = 0x1; 644 data->operation.operation = 0x03; 645 data->count++; 646 break; 647 case DASD_ECKD_CCW_READ_RECORD_ZERO: 648 data->operation.orientation = 0x3; 649 data->operation.operation = 0x16; 650 data->count++; 651 break; 652 case DASD_ECKD_CCW_WRITE: 653 case DASD_ECKD_CCW_WRITE_MT: 654 case DASD_ECKD_CCW_WRITE_KD: 655 case DASD_ECKD_CCW_WRITE_KD_MT: 656 data->auxiliary.last_bytes_used = 0x1; 657 data->length = reclen; 658 data->operation.operation = 0x01; 659 break; 660 case DASD_ECKD_CCW_WRITE_CKD: 661 case DASD_ECKD_CCW_WRITE_CKD_MT: 662 data->auxiliary.last_bytes_used = 0x1; 663 data->length = reclen; 664 data->operation.operation = 0x03; 665 break; 666 case DASD_ECKD_CCW_READ: 667 case DASD_ECKD_CCW_READ_MT: 668 case DASD_ECKD_CCW_READ_KD: 669 case DASD_ECKD_CCW_READ_KD_MT: 670 data->auxiliary.last_bytes_used = 0x1; 671 data->length = reclen; 672 data->operation.operation = 0x06; 673 break; 674 case DASD_ECKD_CCW_READ_CKD: 675 case DASD_ECKD_CCW_READ_CKD_MT: 676 data->auxiliary.last_bytes_used = 0x1; 677 data->length = reclen; 678 data->operation.operation = 0x16; 679 break; 680 case DASD_ECKD_CCW_READ_COUNT: 681 data->operation.operation = 0x06; 682 break; 683 case DASD_ECKD_CCW_ERASE: 684 data->length = reclen; 685 data->auxiliary.last_bytes_used = 0x1; 686 data->operation.operation = 0x0b; 687 break; 688 default: 689 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 690 "opcode 0x%x", cmd); 691 } 692 set_ch_t(&data->seek_addr, 693 trk / private->rdc_data.trk_per_cyl, 694 trk % private->rdc_data.trk_per_cyl); 695 data->search_arg.cyl = data->seek_addr.cyl; 696 data->search_arg.head = data->seek_addr.head; 697 data->search_arg.record = rec_on_trk; 698 } 699 700 /* 701 * Returns 1 if the block is one of the special blocks that needs 702 * to get read/written with the KD variant of the command. 703 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 704 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 705 * Luckily the KD variants differ only by one bit (0x08) from the 706 * normal variant. So don't wonder about code like: 707 * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 708 * ccw->cmd_code |= 0x8; 709 */ 710 static inline int dasd_eckd_cdl_special(int blk_per_trk,int recid)711 dasd_eckd_cdl_special(int blk_per_trk, int recid) 712 { 713 if (recid < 3) 714 return 1; 715 if (recid < blk_per_trk) 716 return 0; 717 if (recid < 2 * blk_per_trk) 718 return 1; 719 return 0; 720 } 721 722 /* 723 * Returns the record size for the special blocks of the cdl format. 724 * Only returns something useful if dasd_eckd_cdl_special is true 725 * for the recid. 726 */ 727 static inline int dasd_eckd_cdl_reclen(int recid)728 dasd_eckd_cdl_reclen(int recid) 729 { 730 if (recid < 3) 731 return sizes_trk0[recid]; 732 return LABEL_SIZE; 733 } 734 /* create unique id from private structure. */ create_uid(struct dasd_conf * conf,struct dasd_uid * uid)735 static void create_uid(struct dasd_conf *conf, struct dasd_uid *uid) 736 { 737 int count; 738 739 memset(uid, 0, sizeof(struct dasd_uid)); 740 memcpy(uid->vendor, conf->ned->HDA_manufacturer, 741 sizeof(uid->vendor) - 1); 742 EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 743 memcpy(uid->serial, &conf->ned->serial, 744 sizeof(uid->serial) - 1); 745 EBCASC(uid->serial, sizeof(uid->serial) - 1); 746 uid->ssid = conf->gneq->subsystemID; 747 uid->real_unit_addr = conf->ned->unit_addr; 748 if (conf->sneq) { 749 uid->type = conf->sneq->sua_flags; 750 if (uid->type == UA_BASE_PAV_ALIAS) 751 uid->base_unit_addr = conf->sneq->base_unit_addr; 752 } else { 753 uid->type = UA_BASE_DEVICE; 754 } 755 if (conf->vdsneq) { 756 for (count = 0; count < 16; count++) { 757 sprintf(uid->vduit+2*count, "%02x", 758 conf->vdsneq->uit[count]); 759 } 760 } 761 } 762 763 /* 764 * Generate device unique id that specifies the physical device. 765 */ dasd_eckd_generate_uid(struct dasd_device * device)766 static int dasd_eckd_generate_uid(struct dasd_device *device) 767 { 768 struct dasd_eckd_private *private = device->private; 769 unsigned long flags; 770 771 if (!private) 772 return -ENODEV; 773 if (!private->conf.ned || !private->conf.gneq) 774 return -ENODEV; 775 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 776 create_uid(&private->conf, &private->uid); 777 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 778 return 0; 779 } 780 dasd_eckd_get_uid(struct dasd_device * device,struct dasd_uid * uid)781 static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 782 { 783 struct dasd_eckd_private *private = device->private; 784 unsigned long flags; 785 786 if (private) { 787 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 788 *uid = private->uid; 789 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 790 return 0; 791 } 792 return -EINVAL; 793 } 794 795 /* 796 * compare device UID with data of a given dasd_eckd_private structure 797 * return 0 for match 798 */ dasd_eckd_compare_path_uid(struct dasd_device * device,struct dasd_conf * path_conf)799 static int dasd_eckd_compare_path_uid(struct dasd_device *device, 800 struct dasd_conf *path_conf) 801 { 802 struct dasd_uid device_uid; 803 struct dasd_uid path_uid; 804 805 create_uid(path_conf, &path_uid); 806 dasd_eckd_get_uid(device, &device_uid); 807 808 return memcmp(&device_uid, &path_uid, sizeof(struct dasd_uid)); 809 } 810 dasd_eckd_fill_rcd_cqr(struct dasd_device * device,struct dasd_ccw_req * cqr,__u8 * rcd_buffer,__u8 lpm)811 static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 812 struct dasd_ccw_req *cqr, 813 __u8 *rcd_buffer, 814 __u8 lpm) 815 { 816 struct ccw1 *ccw; 817 /* 818 * buffer has to start with EBCDIC "V1.0" to show 819 * support for virtual device SNEQ 820 */ 821 rcd_buffer[0] = 0xE5; 822 rcd_buffer[1] = 0xF1; 823 rcd_buffer[2] = 0x4B; 824 rcd_buffer[3] = 0xF0; 825 826 ccw = cqr->cpaddr; 827 ccw->cmd_code = DASD_ECKD_CCW_RCD; 828 ccw->flags = 0; 829 ccw->cda = virt_to_dma32(rcd_buffer); 830 ccw->count = DASD_ECKD_RCD_DATA_SIZE; 831 cqr->magic = DASD_ECKD_MAGIC; 832 833 cqr->startdev = device; 834 cqr->memdev = device; 835 cqr->block = NULL; 836 cqr->expires = 10*HZ; 837 cqr->lpm = lpm; 838 cqr->retries = 256; 839 cqr->buildclk = get_tod_clock(); 840 cqr->status = DASD_CQR_FILLED; 841 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 842 } 843 844 /* 845 * Wakeup helper for read_conf 846 * if the cqr is not done and needs some error recovery 847 * the buffer has to be re-initialized with the EBCDIC "V1.0" 848 * to show support for virtual device SNEQ 849 */ read_conf_cb(struct dasd_ccw_req * cqr,void * data)850 static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 851 { 852 struct ccw1 *ccw; 853 __u8 *rcd_buffer; 854 855 if (cqr->status != DASD_CQR_DONE) { 856 ccw = cqr->cpaddr; 857 rcd_buffer = dma32_to_virt(ccw->cda); 858 memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 859 860 rcd_buffer[0] = 0xE5; 861 rcd_buffer[1] = 0xF1; 862 rcd_buffer[2] = 0x4B; 863 rcd_buffer[3] = 0xF0; 864 } 865 dasd_wakeup_cb(cqr, data); 866 } 867 dasd_eckd_read_conf_immediately(struct dasd_device * device,struct dasd_ccw_req * cqr,__u8 * rcd_buffer,__u8 lpm)868 static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 869 struct dasd_ccw_req *cqr, 870 __u8 *rcd_buffer, 871 __u8 lpm) 872 { 873 struct ciw *ciw; 874 int rc; 875 /* 876 * sanity check: scan for RCD command in extended SenseID data 877 * some devices do not support RCD 878 */ 879 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 880 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 881 return -EOPNOTSUPP; 882 883 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 884 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 885 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 886 cqr->retries = 5; 887 cqr->callback = read_conf_cb; 888 rc = dasd_sleep_on_immediatly(cqr); 889 return rc; 890 } 891 dasd_eckd_read_conf_lpm(struct dasd_device * device,void ** rcd_buffer,int * rcd_buffer_size,__u8 lpm)892 static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 893 void **rcd_buffer, 894 int *rcd_buffer_size, __u8 lpm) 895 { 896 struct ciw *ciw; 897 char *rcd_buf = NULL; 898 int ret; 899 struct dasd_ccw_req *cqr; 900 901 /* 902 * sanity check: scan for RCD command in extended SenseID data 903 * some devices do not support RCD 904 */ 905 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 906 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 907 ret = -EOPNOTSUPP; 908 goto out_error; 909 } 910 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 911 if (!rcd_buf) { 912 ret = -ENOMEM; 913 goto out_error; 914 } 915 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 916 0, /* use rcd_buf as data ara */ 917 device, NULL); 918 if (IS_ERR(cqr)) { 919 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 920 "Could not allocate RCD request"); 921 ret = -ENOMEM; 922 goto out_error; 923 } 924 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 925 cqr->callback = read_conf_cb; 926 ret = dasd_sleep_on(cqr); 927 /* 928 * on success we update the user input parms 929 */ 930 dasd_sfree_request(cqr, cqr->memdev); 931 if (ret) 932 goto out_error; 933 934 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 935 *rcd_buffer = rcd_buf; 936 return 0; 937 out_error: 938 kfree(rcd_buf); 939 *rcd_buffer = NULL; 940 *rcd_buffer_size = 0; 941 return ret; 942 } 943 dasd_eckd_identify_conf_parts(struct dasd_conf * conf)944 static int dasd_eckd_identify_conf_parts(struct dasd_conf *conf) 945 { 946 947 struct dasd_sneq *sneq; 948 int i, count; 949 950 conf->ned = NULL; 951 conf->sneq = NULL; 952 conf->vdsneq = NULL; 953 conf->gneq = NULL; 954 count = conf->len / sizeof(struct dasd_sneq); 955 sneq = (struct dasd_sneq *)conf->data; 956 for (i = 0; i < count; ++i) { 957 if (sneq->flags.identifier == 1 && sneq->format == 1) 958 conf->sneq = sneq; 959 else if (sneq->flags.identifier == 1 && sneq->format == 4) 960 conf->vdsneq = (struct vd_sneq *)sneq; 961 else if (sneq->flags.identifier == 2) 962 conf->gneq = (struct dasd_gneq *)sneq; 963 else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 964 conf->ned = (struct dasd_ned *)sneq; 965 sneq++; 966 } 967 if (!conf->ned || !conf->gneq) { 968 conf->ned = NULL; 969 conf->sneq = NULL; 970 conf->vdsneq = NULL; 971 conf->gneq = NULL; 972 return -EINVAL; 973 } 974 return 0; 975 976 }; 977 dasd_eckd_path_access(void * conf_data,int conf_len)978 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 979 { 980 struct dasd_gneq *gneq; 981 int i, count, found; 982 983 count = conf_len / sizeof(*gneq); 984 gneq = (struct dasd_gneq *)conf_data; 985 found = 0; 986 for (i = 0; i < count; ++i) { 987 if (gneq->flags.identifier == 2) { 988 found = 1; 989 break; 990 } 991 gneq++; 992 } 993 if (found) 994 return ((char *)gneq)[18] & 0x07; 995 else 996 return 0; 997 } 998 dasd_eckd_store_conf_data(struct dasd_device * device,struct dasd_conf_data * conf_data,int chp)999 static void dasd_eckd_store_conf_data(struct dasd_device *device, 1000 struct dasd_conf_data *conf_data, int chp) 1001 { 1002 struct dasd_eckd_private *private = device->private; 1003 struct channel_path_desc_fmt0 *chp_desc; 1004 struct subchannel_id sch_id; 1005 void *cdp; 1006 1007 /* 1008 * path handling and read_conf allocate data 1009 * free it before replacing the pointer 1010 * also replace the old private->conf_data pointer 1011 * with the new one if this points to the same data 1012 */ 1013 cdp = device->path[chp].conf_data; 1014 if (private->conf.data == cdp) { 1015 private->conf.data = (void *)conf_data; 1016 dasd_eckd_identify_conf_parts(&private->conf); 1017 } 1018 ccw_device_get_schid(device->cdev, &sch_id); 1019 device->path[chp].conf_data = conf_data; 1020 device->path[chp].cssid = sch_id.cssid; 1021 device->path[chp].ssid = sch_id.ssid; 1022 chp_desc = ccw_device_get_chp_desc(device->cdev, chp); 1023 if (chp_desc) 1024 device->path[chp].chpid = chp_desc->chpid; 1025 kfree(chp_desc); 1026 kfree(cdp); 1027 } 1028 dasd_eckd_clear_conf_data(struct dasd_device * device)1029 static void dasd_eckd_clear_conf_data(struct dasd_device *device) 1030 { 1031 struct dasd_eckd_private *private = device->private; 1032 int i; 1033 1034 private->conf.data = NULL; 1035 private->conf.len = 0; 1036 for (i = 0; i < 8; i++) { 1037 kfree(device->path[i].conf_data); 1038 device->path[i].conf_data = NULL; 1039 device->path[i].cssid = 0; 1040 device->path[i].ssid = 0; 1041 device->path[i].chpid = 0; 1042 dasd_path_notoper(device, i); 1043 } 1044 } 1045 dasd_eckd_read_fc_security(struct dasd_device * device)1046 static void dasd_eckd_read_fc_security(struct dasd_device *device) 1047 { 1048 struct dasd_eckd_private *private = device->private; 1049 u8 esm_valid; 1050 u8 esm[8]; 1051 int chp; 1052 int rc; 1053 1054 rc = chsc_scud(private->uid.ssid, (u64 *)esm, &esm_valid); 1055 if (rc) { 1056 for (chp = 0; chp < 8; chp++) 1057 device->path[chp].fc_security = 0; 1058 return; 1059 } 1060 1061 for (chp = 0; chp < 8; chp++) { 1062 if (esm_valid & (0x80 >> chp)) 1063 device->path[chp].fc_security = esm[chp]; 1064 else 1065 device->path[chp].fc_security = 0; 1066 } 1067 } 1068 dasd_eckd_get_uid_string(struct dasd_conf * conf,char * print_uid)1069 static void dasd_eckd_get_uid_string(struct dasd_conf *conf, char *print_uid) 1070 { 1071 struct dasd_uid uid; 1072 1073 create_uid(conf, &uid); 1074 snprintf(print_uid, DASD_UID_STRLEN, "%s.%s.%04x.%02x%s%s", 1075 uid.vendor, uid.serial, uid.ssid, uid.real_unit_addr, 1076 uid.vduit[0] ? "." : "", uid.vduit); 1077 } 1078 dasd_eckd_check_cabling(struct dasd_device * device,void * conf_data,__u8 lpm)1079 static int dasd_eckd_check_cabling(struct dasd_device *device, 1080 void *conf_data, __u8 lpm) 1081 { 1082 char print_path_uid[DASD_UID_STRLEN], print_device_uid[DASD_UID_STRLEN]; 1083 struct dasd_eckd_private *private = device->private; 1084 struct dasd_conf path_conf; 1085 1086 path_conf.data = conf_data; 1087 path_conf.len = DASD_ECKD_RCD_DATA_SIZE; 1088 if (dasd_eckd_identify_conf_parts(&path_conf)) 1089 return 1; 1090 1091 if (dasd_eckd_compare_path_uid(device, &path_conf)) { 1092 dasd_eckd_get_uid_string(&path_conf, print_path_uid); 1093 dasd_eckd_get_uid_string(&private->conf, print_device_uid); 1094 dev_err(&device->cdev->dev, 1095 "Not all channel paths lead to the same device, path %02X leads to device %s instead of %s\n", 1096 lpm, print_path_uid, print_device_uid); 1097 return 1; 1098 } 1099 1100 return 0; 1101 } 1102 dasd_eckd_read_conf(struct dasd_device * device)1103 static int dasd_eckd_read_conf(struct dasd_device *device) 1104 { 1105 void *conf_data; 1106 int conf_len, conf_data_saved; 1107 int rc, path_err, pos; 1108 __u8 lpm, opm; 1109 struct dasd_eckd_private *private; 1110 1111 private = device->private; 1112 opm = ccw_device_get_path_mask(device->cdev); 1113 conf_data_saved = 0; 1114 path_err = 0; 1115 /* get configuration data per operational path */ 1116 for (lpm = 0x80; lpm; lpm>>= 1) { 1117 if (!(lpm & opm)) 1118 continue; 1119 rc = dasd_eckd_read_conf_lpm(device, &conf_data, 1120 &conf_len, lpm); 1121 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1122 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1123 "Read configuration data returned " 1124 "error %d", rc); 1125 return rc; 1126 } 1127 if (conf_data == NULL) { 1128 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1129 "No configuration data " 1130 "retrieved"); 1131 /* no further analysis possible */ 1132 dasd_path_add_opm(device, opm); 1133 continue; /* no error */ 1134 } 1135 /* save first valid configuration data */ 1136 if (!conf_data_saved) { 1137 /* initially clear previously stored conf_data */ 1138 dasd_eckd_clear_conf_data(device); 1139 private->conf.data = conf_data; 1140 private->conf.len = conf_len; 1141 if (dasd_eckd_identify_conf_parts(&private->conf)) { 1142 private->conf.data = NULL; 1143 private->conf.len = 0; 1144 kfree(conf_data); 1145 continue; 1146 } 1147 /* 1148 * build device UID that other path data 1149 * can be compared to it 1150 */ 1151 dasd_eckd_generate_uid(device); 1152 conf_data_saved++; 1153 } else if (dasd_eckd_check_cabling(device, conf_data, lpm)) { 1154 dasd_path_add_cablepm(device, lpm); 1155 path_err = -EINVAL; 1156 kfree(conf_data); 1157 continue; 1158 } 1159 1160 pos = pathmask_to_pos(lpm); 1161 dasd_eckd_store_conf_data(device, conf_data, pos); 1162 1163 switch (dasd_eckd_path_access(conf_data, conf_len)) { 1164 case 0x02: 1165 dasd_path_add_nppm(device, lpm); 1166 break; 1167 case 0x03: 1168 dasd_path_add_ppm(device, lpm); 1169 break; 1170 } 1171 if (!dasd_path_get_opm(device)) { 1172 dasd_path_set_opm(device, lpm); 1173 dasd_generic_path_operational(device); 1174 } else { 1175 dasd_path_add_opm(device, lpm); 1176 } 1177 } 1178 1179 return path_err; 1180 } 1181 get_fcx_max_data(struct dasd_device * device)1182 static u32 get_fcx_max_data(struct dasd_device *device) 1183 { 1184 struct dasd_eckd_private *private = device->private; 1185 int fcx_in_css, fcx_in_gneq, fcx_in_features; 1186 unsigned int mdc; 1187 int tpm; 1188 1189 if (dasd_nofcx) 1190 return 0; 1191 /* is transport mode supported? */ 1192 fcx_in_css = css_general_characteristics.fcx; 1193 fcx_in_gneq = private->conf.gneq->reserved2[7] & 0x04; 1194 fcx_in_features = private->features.feature[40] & 0x80; 1195 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1196 1197 if (!tpm) 1198 return 0; 1199 1200 mdc = ccw_device_get_mdc(device->cdev, 0); 1201 if (mdc == 0) { 1202 dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); 1203 return 0; 1204 } else { 1205 return (u32)mdc * FCX_MAX_DATA_FACTOR; 1206 } 1207 } 1208 verify_fcx_max_data(struct dasd_device * device,__u8 lpm)1209 static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1210 { 1211 struct dasd_eckd_private *private = device->private; 1212 unsigned int mdc; 1213 u32 fcx_max_data; 1214 1215 if (private->fcx_max_data) { 1216 mdc = ccw_device_get_mdc(device->cdev, lpm); 1217 if (mdc == 0) { 1218 dev_warn(&device->cdev->dev, 1219 "Detecting the maximum data size for zHPF " 1220 "requests failed (rc=%d) for a new path %x\n", 1221 mdc, lpm); 1222 return mdc; 1223 } 1224 fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; 1225 if (fcx_max_data < private->fcx_max_data) { 1226 dev_warn(&device->cdev->dev, 1227 "The maximum data size for zHPF requests %u " 1228 "on a new path %x is below the active maximum " 1229 "%u\n", fcx_max_data, lpm, 1230 private->fcx_max_data); 1231 return -EACCES; 1232 } 1233 } 1234 return 0; 1235 } 1236 rebuild_device_uid(struct dasd_device * device,struct pe_handler_work_data * data)1237 static int rebuild_device_uid(struct dasd_device *device, 1238 struct pe_handler_work_data *data) 1239 { 1240 struct dasd_eckd_private *private = device->private; 1241 __u8 lpm, opm = dasd_path_get_opm(device); 1242 int rc = -ENODEV; 1243 1244 for (lpm = 0x80; lpm; lpm >>= 1) { 1245 if (!(lpm & opm)) 1246 continue; 1247 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1248 memset(&data->cqr, 0, sizeof(data->cqr)); 1249 data->cqr.cpaddr = &data->ccw; 1250 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1251 data->rcd_buffer, 1252 lpm); 1253 1254 if (rc) { 1255 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1256 continue; 1257 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1258 "Read configuration data " 1259 "returned error %d", rc); 1260 break; 1261 } 1262 memcpy(private->conf.data, data->rcd_buffer, 1263 DASD_ECKD_RCD_DATA_SIZE); 1264 if (dasd_eckd_identify_conf_parts(&private->conf)) { 1265 rc = -ENODEV; 1266 } else /* first valid path is enough */ 1267 break; 1268 } 1269 1270 if (!rc) 1271 rc = dasd_eckd_generate_uid(device); 1272 1273 return rc; 1274 } 1275 dasd_eckd_path_available_action(struct dasd_device * device,struct pe_handler_work_data * data)1276 static void dasd_eckd_path_available_action(struct dasd_device *device, 1277 struct pe_handler_work_data *data) 1278 { 1279 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 1280 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1281 struct dasd_conf_data *conf_data; 1282 char print_uid[DASD_UID_STRLEN]; 1283 struct dasd_conf path_conf; 1284 unsigned long flags; 1285 int rc, pos; 1286 1287 opm = 0; 1288 npm = 0; 1289 ppm = 0; 1290 epm = 0; 1291 hpfpm = 0; 1292 cablepm = 0; 1293 1294 for (lpm = 0x80; lpm; lpm >>= 1) { 1295 if (!(lpm & data->tbvpm)) 1296 continue; 1297 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1298 memset(&data->cqr, 0, sizeof(data->cqr)); 1299 data->cqr.cpaddr = &data->ccw; 1300 rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1301 data->rcd_buffer, 1302 lpm); 1303 if (!rc) { 1304 switch (dasd_eckd_path_access(data->rcd_buffer, 1305 DASD_ECKD_RCD_DATA_SIZE) 1306 ) { 1307 case 0x02: 1308 npm |= lpm; 1309 break; 1310 case 0x03: 1311 ppm |= lpm; 1312 break; 1313 } 1314 opm |= lpm; 1315 } else if (rc == -EOPNOTSUPP) { 1316 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1317 "path verification: No configuration " 1318 "data retrieved"); 1319 opm |= lpm; 1320 } else if (rc == -EAGAIN) { 1321 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1322 "path verification: device is stopped," 1323 " try again later"); 1324 epm |= lpm; 1325 } else { 1326 dev_warn(&device->cdev->dev, 1327 "Reading device feature codes failed " 1328 "(rc=%d) for new path %x\n", rc, lpm); 1329 continue; 1330 } 1331 if (verify_fcx_max_data(device, lpm)) { 1332 opm &= ~lpm; 1333 npm &= ~lpm; 1334 ppm &= ~lpm; 1335 hpfpm |= lpm; 1336 continue; 1337 } 1338 1339 /* 1340 * save conf_data for comparison after 1341 * rebuild_device_uid may have changed 1342 * the original data 1343 */ 1344 memcpy(&path_rcd_buf, data->rcd_buffer, 1345 DASD_ECKD_RCD_DATA_SIZE); 1346 path_conf.data = (void *)&path_rcd_buf; 1347 path_conf.len = DASD_ECKD_RCD_DATA_SIZE; 1348 if (dasd_eckd_identify_conf_parts(&path_conf)) { 1349 path_conf.data = NULL; 1350 path_conf.len = 0; 1351 continue; 1352 } 1353 1354 /* 1355 * compare path UID with device UID only if at least 1356 * one valid path is left 1357 * in other case the device UID may have changed and 1358 * the first working path UID will be used as device UID 1359 */ 1360 if (dasd_path_get_opm(device) && 1361 dasd_eckd_compare_path_uid(device, &path_conf)) { 1362 /* 1363 * the comparison was not successful 1364 * rebuild the device UID with at least one 1365 * known path in case a z/VM hyperswap command 1366 * has changed the device 1367 * 1368 * after this compare again 1369 * 1370 * if either the rebuild or the recompare fails 1371 * the path can not be used 1372 */ 1373 if (rebuild_device_uid(device, data) || 1374 dasd_eckd_compare_path_uid( 1375 device, &path_conf)) { 1376 dasd_eckd_get_uid_string(&path_conf, print_uid); 1377 dev_err(&device->cdev->dev, 1378 "The newly added channel path %02X " 1379 "will not be used because it leads " 1380 "to a different device %s\n", 1381 lpm, print_uid); 1382 opm &= ~lpm; 1383 npm &= ~lpm; 1384 ppm &= ~lpm; 1385 cablepm |= lpm; 1386 continue; 1387 } 1388 } 1389 1390 conf_data = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL); 1391 if (conf_data) { 1392 memcpy(conf_data, data->rcd_buffer, 1393 DASD_ECKD_RCD_DATA_SIZE); 1394 } else { 1395 /* 1396 * path is operational but path config data could not 1397 * be stored due to low mem condition 1398 * add it to the error path mask and schedule a path 1399 * verification later that this could be added again 1400 */ 1401 epm |= lpm; 1402 } 1403 pos = pathmask_to_pos(lpm); 1404 dasd_eckd_store_conf_data(device, conf_data, pos); 1405 1406 /* 1407 * There is a small chance that a path is lost again between 1408 * above path verification and the following modification of 1409 * the device opm mask. We could avoid that race here by using 1410 * yet another path mask, but we rather deal with this unlikely 1411 * situation in dasd_start_IO. 1412 */ 1413 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1414 if (!dasd_path_get_opm(device) && opm) { 1415 dasd_path_set_opm(device, opm); 1416 dasd_generic_path_operational(device); 1417 } else { 1418 dasd_path_add_opm(device, opm); 1419 } 1420 dasd_path_add_nppm(device, npm); 1421 dasd_path_add_ppm(device, ppm); 1422 if (epm) { 1423 dasd_path_add_tbvpm(device, epm); 1424 dasd_device_set_timer(device, 50); 1425 } 1426 dasd_path_add_cablepm(device, cablepm); 1427 dasd_path_add_nohpfpm(device, hpfpm); 1428 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1429 1430 dasd_path_create_kobj(device, pos); 1431 } 1432 } 1433 do_pe_handler_work(struct work_struct * work)1434 static void do_pe_handler_work(struct work_struct *work) 1435 { 1436 struct pe_handler_work_data *data; 1437 struct dasd_device *device; 1438 1439 data = container_of(work, struct pe_handler_work_data, worker); 1440 device = data->device; 1441 1442 /* delay path verification until device was resumed */ 1443 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1444 schedule_work(work); 1445 return; 1446 } 1447 /* check if path verification already running and delay if so */ 1448 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 1449 schedule_work(work); 1450 return; 1451 } 1452 1453 if (data->tbvpm) 1454 dasd_eckd_path_available_action(device, data); 1455 if (data->fcsecpm) 1456 dasd_eckd_read_fc_security(device); 1457 1458 clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1459 dasd_put_device(device); 1460 if (data->isglobal) 1461 mutex_unlock(&dasd_pe_handler_mutex); 1462 else 1463 kfree(data); 1464 } 1465 dasd_eckd_pe_handler(struct dasd_device * device,__u8 tbvpm,__u8 fcsecpm)1466 static int dasd_eckd_pe_handler(struct dasd_device *device, 1467 __u8 tbvpm, __u8 fcsecpm) 1468 { 1469 struct pe_handler_work_data *data; 1470 1471 data = kzalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1472 if (!data) { 1473 if (mutex_trylock(&dasd_pe_handler_mutex)) { 1474 data = pe_handler_worker; 1475 data->isglobal = 1; 1476 } else { 1477 return -ENOMEM; 1478 } 1479 } 1480 INIT_WORK(&data->worker, do_pe_handler_work); 1481 dasd_get_device(device); 1482 data->device = device; 1483 data->tbvpm = tbvpm; 1484 data->fcsecpm = fcsecpm; 1485 schedule_work(&data->worker); 1486 return 0; 1487 } 1488 dasd_eckd_reset_path(struct dasd_device * device,__u8 pm)1489 static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) 1490 { 1491 struct dasd_eckd_private *private = device->private; 1492 unsigned long flags; 1493 1494 if (!private->fcx_max_data) 1495 private->fcx_max_data = get_fcx_max_data(device); 1496 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1497 dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); 1498 dasd_schedule_device_bh(device); 1499 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1500 } 1501 dasd_eckd_read_features(struct dasd_device * device)1502 static int dasd_eckd_read_features(struct dasd_device *device) 1503 { 1504 struct dasd_eckd_private *private = device->private; 1505 struct dasd_psf_prssd_data *prssdp; 1506 struct dasd_rssd_features *features; 1507 struct dasd_ccw_req *cqr; 1508 struct ccw1 *ccw; 1509 int rc; 1510 1511 memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 1512 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 1513 (sizeof(struct dasd_psf_prssd_data) + 1514 sizeof(struct dasd_rssd_features)), 1515 device, NULL); 1516 if (IS_ERR(cqr)) { 1517 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1518 "allocate initialization request"); 1519 return PTR_ERR(cqr); 1520 } 1521 cqr->startdev = device; 1522 cqr->memdev = device; 1523 cqr->block = NULL; 1524 cqr->retries = 256; 1525 cqr->expires = 10 * HZ; 1526 1527 /* Prepare for Read Subsystem Data */ 1528 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1529 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 1530 prssdp->order = PSF_ORDER_PRSSD; 1531 prssdp->suborder = 0x41; /* Read Feature Codes */ 1532 /* all other bytes of prssdp must be zero */ 1533 1534 ccw = cqr->cpaddr; 1535 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1536 ccw->count = sizeof(struct dasd_psf_prssd_data); 1537 ccw->flags |= CCW_FLAG_CC; 1538 ccw->cda = virt_to_dma32(prssdp); 1539 1540 /* Read Subsystem Data - feature codes */ 1541 features = (struct dasd_rssd_features *) (prssdp + 1); 1542 memset(features, 0, sizeof(struct dasd_rssd_features)); 1543 1544 ccw++; 1545 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1546 ccw->count = sizeof(struct dasd_rssd_features); 1547 ccw->cda = virt_to_dma32(features); 1548 1549 cqr->buildclk = get_tod_clock(); 1550 cqr->status = DASD_CQR_FILLED; 1551 rc = dasd_sleep_on(cqr); 1552 if (rc == 0) { 1553 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1554 features = (struct dasd_rssd_features *) (prssdp + 1); 1555 memcpy(&private->features, features, 1556 sizeof(struct dasd_rssd_features)); 1557 } else 1558 dev_warn(&device->cdev->dev, "Reading device feature codes" 1559 " failed with rc=%d\n", rc); 1560 dasd_sfree_request(cqr, cqr->memdev); 1561 return rc; 1562 } 1563 1564 /* Read Volume Information - Volume Storage Query */ dasd_eckd_read_vol_info(struct dasd_device * device)1565 static int dasd_eckd_read_vol_info(struct dasd_device *device) 1566 { 1567 struct dasd_eckd_private *private = device->private; 1568 struct dasd_psf_prssd_data *prssdp; 1569 struct dasd_rssd_vsq *vsq; 1570 struct dasd_ccw_req *cqr; 1571 struct ccw1 *ccw; 1572 int useglobal; 1573 int rc; 1574 1575 /* This command cannot be executed on an alias device */ 1576 if (private->uid.type == UA_BASE_PAV_ALIAS || 1577 private->uid.type == UA_HYPER_PAV_ALIAS) 1578 return 0; 1579 1580 useglobal = 0; 1581 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1582 sizeof(*prssdp) + sizeof(*vsq), device, NULL); 1583 if (IS_ERR(cqr)) { 1584 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1585 "Could not allocate initialization request"); 1586 mutex_lock(&dasd_vol_info_mutex); 1587 useglobal = 1; 1588 cqr = &dasd_vol_info_req->cqr; 1589 memset(cqr, 0, sizeof(*cqr)); 1590 memset(dasd_vol_info_req, 0, sizeof(*dasd_vol_info_req)); 1591 cqr->cpaddr = &dasd_vol_info_req->ccw; 1592 cqr->data = &dasd_vol_info_req->data; 1593 cqr->magic = DASD_ECKD_MAGIC; 1594 } 1595 1596 /* Prepare for Read Subsystem Data */ 1597 prssdp = cqr->data; 1598 prssdp->order = PSF_ORDER_PRSSD; 1599 prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */ 1600 prssdp->lss = private->conf.ned->ID; 1601 prssdp->volume = private->conf.ned->unit_addr; 1602 1603 ccw = cqr->cpaddr; 1604 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1605 ccw->count = sizeof(*prssdp); 1606 ccw->flags |= CCW_FLAG_CC; 1607 ccw->cda = virt_to_dma32(prssdp); 1608 1609 /* Read Subsystem Data - Volume Storage Query */ 1610 vsq = (struct dasd_rssd_vsq *)(prssdp + 1); 1611 memset(vsq, 0, sizeof(*vsq)); 1612 1613 ccw++; 1614 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1615 ccw->count = sizeof(*vsq); 1616 ccw->flags |= CCW_FLAG_SLI; 1617 ccw->cda = virt_to_dma32(vsq); 1618 1619 cqr->buildclk = get_tod_clock(); 1620 cqr->status = DASD_CQR_FILLED; 1621 cqr->startdev = device; 1622 cqr->memdev = device; 1623 cqr->block = NULL; 1624 cqr->retries = 256; 1625 cqr->expires = device->default_expires * HZ; 1626 /* The command might not be supported. Suppress the error output */ 1627 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1628 1629 rc = dasd_sleep_on_interruptible(cqr); 1630 if (rc == 0) { 1631 memcpy(&private->vsq, vsq, sizeof(*vsq)); 1632 } else { 1633 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1634 "Reading the volume storage information failed with rc=%d", rc); 1635 } 1636 1637 if (useglobal) 1638 mutex_unlock(&dasd_vol_info_mutex); 1639 else 1640 dasd_sfree_request(cqr, cqr->memdev); 1641 1642 return rc; 1643 } 1644 dasd_eckd_is_ese(struct dasd_device * device)1645 static int dasd_eckd_is_ese(struct dasd_device *device) 1646 { 1647 struct dasd_eckd_private *private = device->private; 1648 1649 return private->vsq.vol_info.ese; 1650 } 1651 dasd_eckd_ext_pool_id(struct dasd_device * device)1652 static int dasd_eckd_ext_pool_id(struct dasd_device *device) 1653 { 1654 struct dasd_eckd_private *private = device->private; 1655 1656 return private->vsq.extent_pool_id; 1657 } 1658 1659 /* 1660 * This value represents the total amount of available space. As more space is 1661 * allocated by ESE volumes, this value will decrease. 1662 * The data for this value is therefore updated on any call. 1663 */ dasd_eckd_space_configured(struct dasd_device * device)1664 static int dasd_eckd_space_configured(struct dasd_device *device) 1665 { 1666 struct dasd_eckd_private *private = device->private; 1667 int rc; 1668 1669 rc = dasd_eckd_read_vol_info(device); 1670 1671 return rc ? : private->vsq.space_configured; 1672 } 1673 1674 /* 1675 * The value of space allocated by an ESE volume may have changed and is 1676 * therefore updated on any call. 1677 */ dasd_eckd_space_allocated(struct dasd_device * device)1678 static int dasd_eckd_space_allocated(struct dasd_device *device) 1679 { 1680 struct dasd_eckd_private *private = device->private; 1681 int rc; 1682 1683 rc = dasd_eckd_read_vol_info(device); 1684 1685 return rc ? : private->vsq.space_allocated; 1686 } 1687 dasd_eckd_logical_capacity(struct dasd_device * device)1688 static int dasd_eckd_logical_capacity(struct dasd_device *device) 1689 { 1690 struct dasd_eckd_private *private = device->private; 1691 1692 return private->vsq.logical_capacity; 1693 } 1694 dasd_eckd_ext_pool_exhaust_work(struct work_struct * work)1695 static void dasd_eckd_ext_pool_exhaust_work(struct work_struct *work) 1696 { 1697 struct ext_pool_exhaust_work_data *data; 1698 struct dasd_device *device; 1699 struct dasd_device *base; 1700 1701 data = container_of(work, struct ext_pool_exhaust_work_data, worker); 1702 device = data->device; 1703 base = data->base; 1704 1705 if (!base) 1706 base = device; 1707 if (dasd_eckd_space_configured(base) != 0) { 1708 dasd_generic_space_avail(device); 1709 } else { 1710 dev_warn(&device->cdev->dev, "No space left in the extent pool\n"); 1711 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "out of space"); 1712 } 1713 1714 dasd_put_device(device); 1715 kfree(data); 1716 } 1717 dasd_eckd_ext_pool_exhaust(struct dasd_device * device,struct dasd_ccw_req * cqr)1718 static int dasd_eckd_ext_pool_exhaust(struct dasd_device *device, 1719 struct dasd_ccw_req *cqr) 1720 { 1721 struct ext_pool_exhaust_work_data *data; 1722 1723 data = kzalloc(sizeof(*data), GFP_ATOMIC); 1724 if (!data) 1725 return -ENOMEM; 1726 INIT_WORK(&data->worker, dasd_eckd_ext_pool_exhaust_work); 1727 dasd_get_device(device); 1728 data->device = device; 1729 1730 if (cqr->block) 1731 data->base = cqr->block->base; 1732 else if (cqr->basedev) 1733 data->base = cqr->basedev; 1734 else 1735 data->base = NULL; 1736 1737 schedule_work(&data->worker); 1738 1739 return 0; 1740 } 1741 dasd_eckd_cpy_ext_pool_data(struct dasd_device * device,struct dasd_rssd_lcq * lcq)1742 static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device, 1743 struct dasd_rssd_lcq *lcq) 1744 { 1745 struct dasd_eckd_private *private = device->private; 1746 int pool_id = dasd_eckd_ext_pool_id(device); 1747 struct dasd_ext_pool_sum eps; 1748 int i; 1749 1750 for (i = 0; i < lcq->pool_count; i++) { 1751 eps = lcq->ext_pool_sum[i]; 1752 if (eps.pool_id == pool_id) { 1753 memcpy(&private->eps, &eps, 1754 sizeof(struct dasd_ext_pool_sum)); 1755 } 1756 } 1757 } 1758 1759 /* Read Extent Pool Information - Logical Configuration Query */ dasd_eckd_read_ext_pool_info(struct dasd_device * device)1760 static int dasd_eckd_read_ext_pool_info(struct dasd_device *device) 1761 { 1762 struct dasd_eckd_private *private = device->private; 1763 struct dasd_psf_prssd_data *prssdp; 1764 struct dasd_rssd_lcq *lcq; 1765 struct dasd_ccw_req *cqr; 1766 struct ccw1 *ccw; 1767 int rc; 1768 1769 /* This command cannot be executed on an alias device */ 1770 if (private->uid.type == UA_BASE_PAV_ALIAS || 1771 private->uid.type == UA_HYPER_PAV_ALIAS) 1772 return 0; 1773 1774 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1775 sizeof(*prssdp) + sizeof(*lcq), device, NULL); 1776 if (IS_ERR(cqr)) { 1777 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1778 "Could not allocate initialization request"); 1779 return PTR_ERR(cqr); 1780 } 1781 1782 /* Prepare for Read Subsystem Data */ 1783 prssdp = cqr->data; 1784 memset(prssdp, 0, sizeof(*prssdp)); 1785 prssdp->order = PSF_ORDER_PRSSD; 1786 prssdp->suborder = PSF_SUBORDER_LCQ; /* Logical Configuration Query */ 1787 1788 ccw = cqr->cpaddr; 1789 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1790 ccw->count = sizeof(*prssdp); 1791 ccw->flags |= CCW_FLAG_CC; 1792 ccw->cda = virt_to_dma32(prssdp); 1793 1794 lcq = (struct dasd_rssd_lcq *)(prssdp + 1); 1795 memset(lcq, 0, sizeof(*lcq)); 1796 1797 ccw++; 1798 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1799 ccw->count = sizeof(*lcq); 1800 ccw->flags |= CCW_FLAG_SLI; 1801 ccw->cda = virt_to_dma32(lcq); 1802 1803 cqr->buildclk = get_tod_clock(); 1804 cqr->status = DASD_CQR_FILLED; 1805 cqr->startdev = device; 1806 cqr->memdev = device; 1807 cqr->block = NULL; 1808 cqr->retries = 256; 1809 cqr->expires = device->default_expires * HZ; 1810 /* The command might not be supported. Suppress the error output */ 1811 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1812 1813 rc = dasd_sleep_on_interruptible(cqr); 1814 if (rc == 0) { 1815 dasd_eckd_cpy_ext_pool_data(device, lcq); 1816 } else { 1817 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1818 "Reading the logical configuration failed with rc=%d", rc); 1819 } 1820 1821 dasd_sfree_request(cqr, cqr->memdev); 1822 1823 return rc; 1824 } 1825 1826 /* 1827 * Depending on the device type, the extent size is specified either as 1828 * cylinders per extent (CKD) or size per extent (FBA) 1829 * A 1GB size corresponds to 1113cyl, and 16MB to 21cyl. 1830 */ dasd_eckd_ext_size(struct dasd_device * device)1831 static int dasd_eckd_ext_size(struct dasd_device *device) 1832 { 1833 struct dasd_eckd_private *private = device->private; 1834 struct dasd_ext_pool_sum eps = private->eps; 1835 1836 if (!eps.flags.extent_size_valid) 1837 return 0; 1838 if (eps.extent_size.size_1G) 1839 return 1113; 1840 if (eps.extent_size.size_16M) 1841 return 21; 1842 1843 return 0; 1844 } 1845 dasd_eckd_ext_pool_warn_thrshld(struct dasd_device * device)1846 static int dasd_eckd_ext_pool_warn_thrshld(struct dasd_device *device) 1847 { 1848 struct dasd_eckd_private *private = device->private; 1849 1850 return private->eps.warn_thrshld; 1851 } 1852 dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device * device)1853 static int dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device *device) 1854 { 1855 struct dasd_eckd_private *private = device->private; 1856 1857 return private->eps.flags.capacity_at_warnlevel; 1858 } 1859 1860 /* 1861 * Extent Pool out of space 1862 */ dasd_eckd_ext_pool_oos(struct dasd_device * device)1863 static int dasd_eckd_ext_pool_oos(struct dasd_device *device) 1864 { 1865 struct dasd_eckd_private *private = device->private; 1866 1867 return private->eps.flags.pool_oos; 1868 } 1869 1870 /* 1871 * Build CP for Perform Subsystem Function - SSC. 1872 */ dasd_eckd_build_psf_ssc(struct dasd_device * device,int enable_pav)1873 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1874 int enable_pav) 1875 { 1876 struct dasd_ccw_req *cqr; 1877 struct dasd_psf_ssc_data *psf_ssc_data; 1878 struct ccw1 *ccw; 1879 1880 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 1881 sizeof(struct dasd_psf_ssc_data), 1882 device, NULL); 1883 1884 if (IS_ERR(cqr)) { 1885 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1886 "Could not allocate PSF-SSC request"); 1887 return cqr; 1888 } 1889 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 1890 psf_ssc_data->order = PSF_ORDER_SSC; 1891 psf_ssc_data->suborder = 0xc0; 1892 if (enable_pav) { 1893 psf_ssc_data->suborder |= 0x08; 1894 psf_ssc_data->reserved[0] = 0x88; 1895 } 1896 ccw = cqr->cpaddr; 1897 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1898 ccw->cda = virt_to_dma32(psf_ssc_data); 1899 ccw->count = 66; 1900 1901 cqr->startdev = device; 1902 cqr->memdev = device; 1903 cqr->block = NULL; 1904 cqr->retries = 256; 1905 cqr->expires = 10*HZ; 1906 cqr->buildclk = get_tod_clock(); 1907 cqr->status = DASD_CQR_FILLED; 1908 return cqr; 1909 } 1910 1911 /* 1912 * Perform Subsystem Function. 1913 * It is necessary to trigger CIO for channel revalidation since this 1914 * call might change behaviour of DASD devices. 1915 */ 1916 static int dasd_eckd_psf_ssc(struct dasd_device * device,int enable_pav,unsigned long flags)1917 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 1918 unsigned long flags) 1919 { 1920 struct dasd_ccw_req *cqr; 1921 int rc; 1922 1923 cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 1924 if (IS_ERR(cqr)) 1925 return PTR_ERR(cqr); 1926 1927 /* 1928 * set flags e.g. turn on failfast, to prevent blocking 1929 * the calling function should handle failed requests 1930 */ 1931 cqr->flags |= flags; 1932 1933 rc = dasd_sleep_on(cqr); 1934 if (!rc) 1935 /* trigger CIO to reprobe devices */ 1936 css_schedule_reprobe(); 1937 else if (cqr->intrc == -EAGAIN) 1938 rc = -EAGAIN; 1939 1940 dasd_sfree_request(cqr, cqr->memdev); 1941 return rc; 1942 } 1943 1944 /* 1945 * Valide storage server of current device. 1946 */ dasd_eckd_validate_server(struct dasd_device * device,unsigned long flags)1947 static int dasd_eckd_validate_server(struct dasd_device *device, 1948 unsigned long flags) 1949 { 1950 struct dasd_eckd_private *private = device->private; 1951 int enable_pav, rc; 1952 1953 if (private->uid.type == UA_BASE_PAV_ALIAS || 1954 private->uid.type == UA_HYPER_PAV_ALIAS) 1955 return 0; 1956 if (dasd_nopav || MACHINE_IS_VM) 1957 enable_pav = 0; 1958 else 1959 enable_pav = 1; 1960 rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1961 1962 /* may be requested feature is not available on server, 1963 * therefore just report error and go ahead */ 1964 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1965 "returned rc=%d", private->uid.ssid, rc); 1966 return rc; 1967 } 1968 1969 /* 1970 * worker to do a validate server in case of a lost pathgroup 1971 */ dasd_eckd_do_validate_server(struct work_struct * work)1972 static void dasd_eckd_do_validate_server(struct work_struct *work) 1973 { 1974 struct dasd_device *device = container_of(work, struct dasd_device, 1975 kick_validate); 1976 unsigned long flags = 0; 1977 1978 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1979 if (dasd_eckd_validate_server(device, flags) 1980 == -EAGAIN) { 1981 /* schedule worker again if failed */ 1982 schedule_work(&device->kick_validate); 1983 return; 1984 } 1985 1986 dasd_put_device(device); 1987 } 1988 dasd_eckd_kick_validate_server(struct dasd_device * device)1989 static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1990 { 1991 dasd_get_device(device); 1992 /* exit if device not online or in offline processing */ 1993 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 1994 device->state < DASD_STATE_ONLINE) { 1995 dasd_put_device(device); 1996 return; 1997 } 1998 /* queue call to do_validate_server to the kernel event daemon. */ 1999 if (!schedule_work(&device->kick_validate)) 2000 dasd_put_device(device); 2001 } 2002 2003 /* 2004 * return if the device is the copy relation primary if a copy relation is active 2005 */ dasd_device_is_primary(struct dasd_device * device)2006 static int dasd_device_is_primary(struct dasd_device *device) 2007 { 2008 if (!device->copy) 2009 return 1; 2010 2011 if (device->copy->active->device == device) 2012 return 1; 2013 2014 return 0; 2015 } 2016 dasd_eckd_alloc_block(struct dasd_device * device)2017 static int dasd_eckd_alloc_block(struct dasd_device *device) 2018 { 2019 struct dasd_block *block; 2020 struct dasd_uid temp_uid; 2021 2022 if (!dasd_device_is_primary(device)) 2023 return 0; 2024 2025 dasd_eckd_get_uid(device, &temp_uid); 2026 if (temp_uid.type == UA_BASE_DEVICE) { 2027 block = dasd_alloc_block(); 2028 if (IS_ERR(block)) { 2029 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 2030 "could not allocate dasd block structure"); 2031 return PTR_ERR(block); 2032 } 2033 device->block = block; 2034 block->base = device; 2035 } 2036 return 0; 2037 } 2038 dasd_eckd_pprc_enabled(struct dasd_device * device)2039 static bool dasd_eckd_pprc_enabled(struct dasd_device *device) 2040 { 2041 struct dasd_eckd_private *private = device->private; 2042 2043 return private->rdc_data.facilities.PPRC_enabled; 2044 } 2045 2046 /* 2047 * Check device characteristics. 2048 * If the device is accessible using ECKD discipline, the device is enabled. 2049 */ 2050 static int dasd_eckd_check_characteristics(struct dasd_device * device)2051 dasd_eckd_check_characteristics(struct dasd_device *device) 2052 { 2053 struct dasd_eckd_private *private = device->private; 2054 int rc, i; 2055 int readonly; 2056 unsigned long value; 2057 2058 /* setup work queue for validate server*/ 2059 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 2060 /* setup work queue for summary unit check */ 2061 INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 2062 2063 if (!ccw_device_is_pathgroup(device->cdev)) { 2064 dev_warn(&device->cdev->dev, 2065 "A channel path group could not be established\n"); 2066 return -EIO; 2067 } 2068 if (!ccw_device_is_multipath(device->cdev)) { 2069 dev_info(&device->cdev->dev, 2070 "The DASD is not operating in multipath mode\n"); 2071 } 2072 if (!private) { 2073 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 2074 if (!private) { 2075 dev_warn(&device->cdev->dev, 2076 "Allocating memory for private DASD data " 2077 "failed\n"); 2078 return -ENOMEM; 2079 } 2080 device->private = private; 2081 } else { 2082 memset(private, 0, sizeof(*private)); 2083 } 2084 /* Invalidate status of initial analysis. */ 2085 private->init_cqr_status = -1; 2086 /* Set default cache operations. */ 2087 private->attrib.operation = DASD_NORMAL_CACHE; 2088 private->attrib.nr_cyl = 0; 2089 2090 /* Read Configuration Data */ 2091 rc = dasd_eckd_read_conf(device); 2092 if (rc) 2093 goto out_err1; 2094 2095 /* set some default values */ 2096 device->default_expires = DASD_EXPIRES; 2097 device->default_retries = DASD_RETRIES; 2098 device->path_thrhld = DASD_ECKD_PATH_THRHLD; 2099 device->path_interval = DASD_ECKD_PATH_INTERVAL; 2100 device->aq_timeouts = DASD_RETRIES_MAX; 2101 2102 if (private->conf.gneq) { 2103 value = 1; 2104 for (i = 0; i < private->conf.gneq->timeout.value; i++) 2105 value = 10 * value; 2106 value = value * private->conf.gneq->timeout.number; 2107 /* do not accept useless values */ 2108 if (value != 0 && value <= DASD_EXPIRES_MAX) 2109 device->default_expires = value; 2110 } 2111 2112 /* Read Device Characteristics */ 2113 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 2114 &private->rdc_data, 64); 2115 if (rc) { 2116 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 2117 "Read device characteristic failed, rc=%d", rc); 2118 goto out_err1; 2119 } 2120 2121 /* setup PPRC for device from devmap */ 2122 rc = dasd_devmap_set_device_copy_relation(device->cdev, 2123 dasd_eckd_pprc_enabled(device)); 2124 if (rc) { 2125 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 2126 "copy relation setup failed, rc=%d", rc); 2127 goto out_err1; 2128 } 2129 2130 /* check if block device is needed and allocate in case */ 2131 rc = dasd_eckd_alloc_block(device); 2132 if (rc) 2133 goto out_err1; 2134 2135 /* register lcu with alias handling, enable PAV */ 2136 rc = dasd_alias_make_device_known_to_lcu(device); 2137 if (rc) 2138 goto out_err2; 2139 2140 dasd_eckd_validate_server(device, 0); 2141 2142 /* device may report different configuration data after LCU setup */ 2143 rc = dasd_eckd_read_conf(device); 2144 if (rc) 2145 goto out_err3; 2146 2147 dasd_eckd_read_fc_security(device); 2148 dasd_path_create_kobjects(device); 2149 2150 /* Read Feature Codes */ 2151 dasd_eckd_read_features(device); 2152 2153 /* Read Volume Information */ 2154 dasd_eckd_read_vol_info(device); 2155 2156 /* Read Extent Pool Information */ 2157 dasd_eckd_read_ext_pool_info(device); 2158 2159 if ((device->features & DASD_FEATURE_USERAW) && 2160 !(private->rdc_data.facilities.RT_in_LR)) { 2161 dev_err(&device->cdev->dev, "The storage server does not " 2162 "support raw-track access\n"); 2163 rc = -EINVAL; 2164 goto out_err3; 2165 } 2166 2167 /* find the valid cylinder size */ 2168 if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 2169 private->rdc_data.long_no_cyl) 2170 private->real_cyl = private->rdc_data.long_no_cyl; 2171 else 2172 private->real_cyl = private->rdc_data.no_cyl; 2173 2174 private->fcx_max_data = get_fcx_max_data(device); 2175 2176 readonly = dasd_device_is_ro(device); 2177 if (readonly) 2178 set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 2179 2180 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 2181 "with %d cylinders, %d heads, %d sectors%s\n", 2182 private->rdc_data.dev_type, 2183 private->rdc_data.dev_model, 2184 private->rdc_data.cu_type, 2185 private->rdc_data.cu_model.model, 2186 private->real_cyl, 2187 private->rdc_data.trk_per_cyl, 2188 private->rdc_data.sec_per_trk, 2189 readonly ? ", read-only device" : ""); 2190 return 0; 2191 2192 out_err3: 2193 dasd_alias_disconnect_device_from_lcu(device); 2194 out_err2: 2195 dasd_free_block(device->block); 2196 device->block = NULL; 2197 out_err1: 2198 dasd_eckd_clear_conf_data(device); 2199 dasd_path_remove_kobjects(device); 2200 kfree(device->private); 2201 device->private = NULL; 2202 return rc; 2203 } 2204 dasd_eckd_uncheck_device(struct dasd_device * device)2205 static void dasd_eckd_uncheck_device(struct dasd_device *device) 2206 { 2207 struct dasd_eckd_private *private = device->private; 2208 2209 if (!private) 2210 return; 2211 2212 dasd_alias_disconnect_device_from_lcu(device); 2213 private->conf.ned = NULL; 2214 private->conf.sneq = NULL; 2215 private->conf.vdsneq = NULL; 2216 private->conf.gneq = NULL; 2217 dasd_eckd_clear_conf_data(device); 2218 dasd_path_remove_kobjects(device); 2219 } 2220 2221 static struct dasd_ccw_req * dasd_eckd_analysis_ccw(struct dasd_device * device)2222 dasd_eckd_analysis_ccw(struct dasd_device *device) 2223 { 2224 struct dasd_eckd_private *private = device->private; 2225 struct eckd_count *count_data; 2226 struct LO_eckd_data *LO_data; 2227 struct dasd_ccw_req *cqr; 2228 struct ccw1 *ccw; 2229 int cplength, datasize; 2230 int i; 2231 2232 cplength = 8; 2233 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 2234 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device, 2235 NULL); 2236 if (IS_ERR(cqr)) 2237 return cqr; 2238 ccw = cqr->cpaddr; 2239 /* Define extent for the first 2 tracks. */ 2240 define_extent(ccw++, cqr->data, 0, 1, 2241 DASD_ECKD_CCW_READ_COUNT, device, 0); 2242 LO_data = cqr->data + sizeof(struct DE_eckd_data); 2243 /* Locate record for the first 4 records on track 0. */ 2244 ccw[-1].flags |= CCW_FLAG_CC; 2245 locate_record(ccw++, LO_data++, 0, 0, 4, 2246 DASD_ECKD_CCW_READ_COUNT, device, 0); 2247 2248 count_data = private->count_area; 2249 for (i = 0; i < 4; i++) { 2250 ccw[-1].flags |= CCW_FLAG_CC; 2251 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 2252 ccw->flags = 0; 2253 ccw->count = 8; 2254 ccw->cda = virt_to_dma32(count_data); 2255 ccw++; 2256 count_data++; 2257 } 2258 2259 /* Locate record for the first record on track 1. */ 2260 ccw[-1].flags |= CCW_FLAG_CC; 2261 locate_record(ccw++, LO_data++, 1, 0, 1, 2262 DASD_ECKD_CCW_READ_COUNT, device, 0); 2263 /* Read count ccw. */ 2264 ccw[-1].flags |= CCW_FLAG_CC; 2265 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 2266 ccw->flags = 0; 2267 ccw->count = 8; 2268 ccw->cda = virt_to_dma32(count_data); 2269 2270 cqr->block = NULL; 2271 cqr->startdev = device; 2272 cqr->memdev = device; 2273 cqr->retries = 255; 2274 cqr->buildclk = get_tod_clock(); 2275 cqr->status = DASD_CQR_FILLED; 2276 /* Set flags to suppress output for expected errors */ 2277 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 2278 set_bit(DASD_CQR_SUPPRESS_IT, &cqr->flags); 2279 2280 return cqr; 2281 } 2282 2283 /* differentiate between 'no record found' and any other error */ dasd_eckd_analysis_evaluation(struct dasd_ccw_req * init_cqr)2284 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 2285 { 2286 char *sense; 2287 if (init_cqr->status == DASD_CQR_DONE) 2288 return INIT_CQR_OK; 2289 else if (init_cqr->status == DASD_CQR_NEED_ERP || 2290 init_cqr->status == DASD_CQR_FAILED) { 2291 sense = dasd_get_sense(&init_cqr->irb); 2292 if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 2293 return INIT_CQR_UNFORMATTED; 2294 else 2295 return INIT_CQR_ERROR; 2296 } else 2297 return INIT_CQR_ERROR; 2298 } 2299 2300 /* 2301 * This is the callback function for the init_analysis cqr. It saves 2302 * the status of the initial analysis ccw before it frees it and kicks 2303 * the device to continue the startup sequence. This will call 2304 * dasd_eckd_do_analysis again (if the devices has not been marked 2305 * for deletion in the meantime). 2306 */ dasd_eckd_analysis_callback(struct dasd_ccw_req * init_cqr,void * data)2307 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 2308 void *data) 2309 { 2310 struct dasd_device *device = init_cqr->startdev; 2311 struct dasd_eckd_private *private = device->private; 2312 2313 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 2314 dasd_sfree_request(init_cqr, device); 2315 dasd_kick_device(device); 2316 } 2317 dasd_eckd_start_analysis(struct dasd_block * block)2318 static int dasd_eckd_start_analysis(struct dasd_block *block) 2319 { 2320 struct dasd_ccw_req *init_cqr; 2321 2322 init_cqr = dasd_eckd_analysis_ccw(block->base); 2323 if (IS_ERR(init_cqr)) 2324 return PTR_ERR(init_cqr); 2325 init_cqr->callback = dasd_eckd_analysis_callback; 2326 init_cqr->callback_data = NULL; 2327 init_cqr->expires = 5*HZ; 2328 /* first try without ERP, so we can later handle unformatted 2329 * devices as special case 2330 */ 2331 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 2332 init_cqr->retries = 0; 2333 dasd_add_request_head(init_cqr); 2334 return -EAGAIN; 2335 } 2336 dasd_eckd_end_analysis(struct dasd_block * block)2337 static int dasd_eckd_end_analysis(struct dasd_block *block) 2338 { 2339 struct dasd_device *device = block->base; 2340 struct dasd_eckd_private *private = device->private; 2341 struct eckd_count *count_area; 2342 unsigned int sb, blk_per_trk; 2343 int status, i; 2344 struct dasd_ccw_req *init_cqr; 2345 2346 status = private->init_cqr_status; 2347 private->init_cqr_status = -1; 2348 if (status == INIT_CQR_ERROR) { 2349 /* try again, this time with full ERP */ 2350 init_cqr = dasd_eckd_analysis_ccw(device); 2351 dasd_sleep_on(init_cqr); 2352 status = dasd_eckd_analysis_evaluation(init_cqr); 2353 dasd_sfree_request(init_cqr, device); 2354 } 2355 2356 if (device->features & DASD_FEATURE_USERAW) { 2357 block->bp_block = DASD_RAW_BLOCKSIZE; 2358 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 2359 block->s2b_shift = 3; 2360 goto raw; 2361 } 2362 2363 if (status == INIT_CQR_UNFORMATTED) { 2364 dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 2365 return -EMEDIUMTYPE; 2366 } else if (status == INIT_CQR_ERROR) { 2367 dev_err(&device->cdev->dev, 2368 "Detecting the DASD disk layout failed because " 2369 "of an I/O error\n"); 2370 return -EIO; 2371 } 2372 2373 private->uses_cdl = 1; 2374 /* Check Track 0 for Compatible Disk Layout */ 2375 count_area = NULL; 2376 for (i = 0; i < 3; i++) { 2377 if (private->count_area[i].kl != 4 || 2378 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 2379 private->count_area[i].cyl != 0 || 2380 private->count_area[i].head != count_area_head[i] || 2381 private->count_area[i].record != count_area_rec[i]) { 2382 private->uses_cdl = 0; 2383 break; 2384 } 2385 } 2386 if (i == 3) 2387 count_area = &private->count_area[3]; 2388 2389 if (private->uses_cdl == 0) { 2390 for (i = 0; i < 5; i++) { 2391 if ((private->count_area[i].kl != 0) || 2392 (private->count_area[i].dl != 2393 private->count_area[0].dl) || 2394 private->count_area[i].cyl != 0 || 2395 private->count_area[i].head != count_area_head[i] || 2396 private->count_area[i].record != count_area_rec[i]) 2397 break; 2398 } 2399 if (i == 5) 2400 count_area = &private->count_area[0]; 2401 } else { 2402 if (private->count_area[3].record == 1) 2403 dev_warn(&device->cdev->dev, 2404 "Track 0 has no records following the VTOC\n"); 2405 } 2406 2407 if (count_area != NULL && count_area->kl == 0) { 2408 /* we found notthing violating our disk layout */ 2409 if (dasd_check_blocksize(count_area->dl) == 0) 2410 block->bp_block = count_area->dl; 2411 } 2412 if (block->bp_block == 0) { 2413 dev_warn(&device->cdev->dev, 2414 "The disk layout of the DASD is not supported\n"); 2415 return -EMEDIUMTYPE; 2416 } 2417 block->s2b_shift = 0; /* bits to shift 512 to get a block */ 2418 for (sb = 512; sb < block->bp_block; sb = sb << 1) 2419 block->s2b_shift++; 2420 2421 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2422 2423 raw: 2424 block->blocks = ((unsigned long) private->real_cyl * 2425 private->rdc_data.trk_per_cyl * 2426 blk_per_trk); 2427 2428 dev_info(&device->cdev->dev, 2429 "DASD with %u KB/block, %lu KB total size, %u KB/track, " 2430 "%s\n", (block->bp_block >> 10), 2431 (((unsigned long) private->real_cyl * 2432 private->rdc_data.trk_per_cyl * 2433 blk_per_trk * (block->bp_block >> 9)) >> 1), 2434 ((blk_per_trk * block->bp_block) >> 10), 2435 private->uses_cdl ? 2436 "compatible disk layout" : "linux disk layout"); 2437 2438 return 0; 2439 } 2440 dasd_eckd_do_analysis(struct dasd_block * block)2441 static int dasd_eckd_do_analysis(struct dasd_block *block) 2442 { 2443 struct dasd_eckd_private *private = block->base->private; 2444 2445 if (private->init_cqr_status < 0) 2446 return dasd_eckd_start_analysis(block); 2447 else 2448 return dasd_eckd_end_analysis(block); 2449 } 2450 dasd_eckd_basic_to_ready(struct dasd_device * device)2451 static int dasd_eckd_basic_to_ready(struct dasd_device *device) 2452 { 2453 return dasd_alias_add_device(device); 2454 }; 2455 dasd_eckd_online_to_ready(struct dasd_device * device)2456 static int dasd_eckd_online_to_ready(struct dasd_device *device) 2457 { 2458 if (cancel_work_sync(&device->reload_device)) 2459 dasd_put_device(device); 2460 if (cancel_work_sync(&device->kick_validate)) 2461 dasd_put_device(device); 2462 2463 return 0; 2464 }; 2465 dasd_eckd_basic_to_known(struct dasd_device * device)2466 static int dasd_eckd_basic_to_known(struct dasd_device *device) 2467 { 2468 return dasd_alias_remove_device(device); 2469 }; 2470 2471 static int dasd_eckd_fill_geometry(struct dasd_block * block,struct hd_geometry * geo)2472 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 2473 { 2474 struct dasd_eckd_private *private = block->base->private; 2475 2476 if (dasd_check_blocksize(block->bp_block) == 0) { 2477 geo->sectors = recs_per_track(&private->rdc_data, 2478 0, block->bp_block); 2479 } 2480 geo->cylinders = private->rdc_data.no_cyl; 2481 geo->heads = private->rdc_data.trk_per_cyl; 2482 return 0; 2483 } 2484 2485 /* 2486 * Build the TCW request for the format check 2487 */ 2488 static struct dasd_ccw_req * dasd_eckd_build_check_tcw(struct dasd_device * base,struct format_data_t * fdata,int enable_pav,struct eckd_count * fmt_buffer,int rpt)2489 dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 2490 int enable_pav, struct eckd_count *fmt_buffer, 2491 int rpt) 2492 { 2493 struct dasd_eckd_private *start_priv; 2494 struct dasd_device *startdev = NULL; 2495 struct tidaw *last_tidaw = NULL; 2496 struct dasd_ccw_req *cqr; 2497 struct itcw *itcw; 2498 int itcw_size; 2499 int count; 2500 int rc; 2501 int i; 2502 2503 if (enable_pav) 2504 startdev = dasd_alias_get_start_dev(base); 2505 2506 if (!startdev) 2507 startdev = base; 2508 2509 start_priv = startdev->private; 2510 2511 count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 2512 2513 /* 2514 * we're adding 'count' amount of tidaw to the itcw. 2515 * calculate the corresponding itcw_size 2516 */ 2517 itcw_size = itcw_calc_size(0, count, 0); 2518 2519 cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2520 if (IS_ERR(cqr)) 2521 return cqr; 2522 2523 start_priv->count++; 2524 2525 itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 2526 if (IS_ERR(itcw)) { 2527 rc = -EINVAL; 2528 goto out_err; 2529 } 2530 2531 cqr->cpaddr = itcw_get_tcw(itcw); 2532 rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 2533 DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 2534 sizeof(struct eckd_count), 2535 count * sizeof(struct eckd_count), 0, rpt); 2536 if (rc) 2537 goto out_err; 2538 2539 for (i = 0; i < count; i++) { 2540 last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 2541 sizeof(struct eckd_count)); 2542 if (IS_ERR(last_tidaw)) { 2543 rc = -EINVAL; 2544 goto out_err; 2545 } 2546 } 2547 2548 last_tidaw->flags |= TIDAW_FLAGS_LAST; 2549 itcw_finalize(itcw); 2550 2551 cqr->cpmode = 1; 2552 cqr->startdev = startdev; 2553 cqr->memdev = startdev; 2554 cqr->basedev = base; 2555 cqr->retries = startdev->default_retries; 2556 cqr->expires = startdev->default_expires * HZ; 2557 cqr->buildclk = get_tod_clock(); 2558 cqr->status = DASD_CQR_FILLED; 2559 /* Set flags to suppress output for expected errors */ 2560 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 2561 2562 return cqr; 2563 2564 out_err: 2565 dasd_sfree_request(cqr, startdev); 2566 2567 return ERR_PTR(rc); 2568 } 2569 2570 /* 2571 * Build the CCW request for the format check 2572 */ 2573 static struct dasd_ccw_req * dasd_eckd_build_check(struct dasd_device * base,struct format_data_t * fdata,int enable_pav,struct eckd_count * fmt_buffer,int rpt)2574 dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 2575 int enable_pav, struct eckd_count *fmt_buffer, int rpt) 2576 { 2577 struct dasd_eckd_private *start_priv; 2578 struct dasd_eckd_private *base_priv; 2579 struct dasd_device *startdev = NULL; 2580 struct dasd_ccw_req *cqr; 2581 struct ccw1 *ccw; 2582 void *data; 2583 int cplength, datasize; 2584 int use_prefix; 2585 int count; 2586 int i; 2587 2588 if (enable_pav) 2589 startdev = dasd_alias_get_start_dev(base); 2590 2591 if (!startdev) 2592 startdev = base; 2593 2594 start_priv = startdev->private; 2595 base_priv = base->private; 2596 2597 count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 2598 2599 use_prefix = base_priv->features.feature[8] & 0x01; 2600 2601 if (use_prefix) { 2602 cplength = 1; 2603 datasize = sizeof(struct PFX_eckd_data); 2604 } else { 2605 cplength = 2; 2606 datasize = sizeof(struct DE_eckd_data) + 2607 sizeof(struct LO_eckd_data); 2608 } 2609 cplength += count; 2610 2611 cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 2612 if (IS_ERR(cqr)) 2613 return cqr; 2614 2615 start_priv->count++; 2616 data = cqr->data; 2617 ccw = cqr->cpaddr; 2618 2619 if (use_prefix) { 2620 prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 2621 DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 2622 count, 0, 0); 2623 } else { 2624 define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 2625 DASD_ECKD_CCW_READ_COUNT, startdev, 0); 2626 2627 data += sizeof(struct DE_eckd_data); 2628 ccw[-1].flags |= CCW_FLAG_CC; 2629 2630 locate_record(ccw++, data, fdata->start_unit, 0, count, 2631 DASD_ECKD_CCW_READ_COUNT, base, 0); 2632 } 2633 2634 for (i = 0; i < count; i++) { 2635 ccw[-1].flags |= CCW_FLAG_CC; 2636 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 2637 ccw->flags = CCW_FLAG_SLI; 2638 ccw->count = 8; 2639 ccw->cda = virt_to_dma32(fmt_buffer); 2640 ccw++; 2641 fmt_buffer++; 2642 } 2643 2644 cqr->startdev = startdev; 2645 cqr->memdev = startdev; 2646 cqr->basedev = base; 2647 cqr->retries = DASD_RETRIES; 2648 cqr->expires = startdev->default_expires * HZ; 2649 cqr->buildclk = get_tod_clock(); 2650 cqr->status = DASD_CQR_FILLED; 2651 /* Set flags to suppress output for expected errors */ 2652 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 2653 2654 return cqr; 2655 } 2656 2657 static struct dasd_ccw_req * dasd_eckd_build_format(struct dasd_device * base,struct dasd_device * startdev,struct format_data_t * fdata,int enable_pav)2658 dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev, 2659 struct format_data_t *fdata, int enable_pav) 2660 { 2661 struct dasd_eckd_private *base_priv; 2662 struct dasd_eckd_private *start_priv; 2663 struct dasd_ccw_req *fcp; 2664 struct eckd_count *ect; 2665 struct ch_t address; 2666 struct ccw1 *ccw; 2667 void *data; 2668 int rpt; 2669 int cplength, datasize; 2670 int i, j; 2671 int intensity = 0; 2672 int r0_perm; 2673 int nr_tracks; 2674 int use_prefix; 2675 2676 if (enable_pav) 2677 startdev = dasd_alias_get_start_dev(base); 2678 2679 if (!startdev) 2680 startdev = base; 2681 2682 start_priv = startdev->private; 2683 base_priv = base->private; 2684 2685 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2686 2687 nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 2688 2689 /* 2690 * fdata->intensity is a bit string that tells us what to do: 2691 * Bit 0: write record zero 2692 * Bit 1: write home address, currently not supported 2693 * Bit 2: invalidate tracks 2694 * Bit 3: use OS/390 compatible disk layout (cdl) 2695 * Bit 4: do not allow storage subsystem to modify record zero 2696 * Only some bit combinations do make sense. 2697 */ 2698 if (fdata->intensity & 0x10) { 2699 r0_perm = 0; 2700 intensity = fdata->intensity & ~0x10; 2701 } else { 2702 r0_perm = 1; 2703 intensity = fdata->intensity; 2704 } 2705 2706 use_prefix = base_priv->features.feature[8] & 0x01; 2707 2708 switch (intensity) { 2709 case 0x00: /* Normal format */ 2710 case 0x08: /* Normal format, use cdl. */ 2711 cplength = 2 + (rpt*nr_tracks); 2712 if (use_prefix) 2713 datasize = sizeof(struct PFX_eckd_data) + 2714 sizeof(struct LO_eckd_data) + 2715 rpt * nr_tracks * sizeof(struct eckd_count); 2716 else 2717 datasize = sizeof(struct DE_eckd_data) + 2718 sizeof(struct LO_eckd_data) + 2719 rpt * nr_tracks * sizeof(struct eckd_count); 2720 break; 2721 case 0x01: /* Write record zero and format track. */ 2722 case 0x09: /* Write record zero and format track, use cdl. */ 2723 cplength = 2 + rpt * nr_tracks; 2724 if (use_prefix) 2725 datasize = sizeof(struct PFX_eckd_data) + 2726 sizeof(struct LO_eckd_data) + 2727 sizeof(struct eckd_count) + 2728 rpt * nr_tracks * sizeof(struct eckd_count); 2729 else 2730 datasize = sizeof(struct DE_eckd_data) + 2731 sizeof(struct LO_eckd_data) + 2732 sizeof(struct eckd_count) + 2733 rpt * nr_tracks * sizeof(struct eckd_count); 2734 break; 2735 case 0x04: /* Invalidate track. */ 2736 case 0x0c: /* Invalidate track, use cdl. */ 2737 cplength = 3; 2738 if (use_prefix) 2739 datasize = sizeof(struct PFX_eckd_data) + 2740 sizeof(struct LO_eckd_data) + 2741 sizeof(struct eckd_count); 2742 else 2743 datasize = sizeof(struct DE_eckd_data) + 2744 sizeof(struct LO_eckd_data) + 2745 sizeof(struct eckd_count); 2746 break; 2747 default: 2748 dev_warn(&startdev->cdev->dev, 2749 "An I/O control call used incorrect flags 0x%x\n", 2750 fdata->intensity); 2751 return ERR_PTR(-EINVAL); 2752 } 2753 2754 fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 2755 if (IS_ERR(fcp)) 2756 return fcp; 2757 2758 start_priv->count++; 2759 data = fcp->data; 2760 ccw = fcp->cpaddr; 2761 2762 switch (intensity & ~0x08) { 2763 case 0x00: /* Normal format. */ 2764 if (use_prefix) { 2765 prefix(ccw++, (struct PFX_eckd_data *) data, 2766 fdata->start_unit, fdata->stop_unit, 2767 DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2768 /* grant subsystem permission to format R0 */ 2769 if (r0_perm) 2770 ((struct PFX_eckd_data *)data) 2771 ->define_extent.ga_extended |= 0x04; 2772 data += sizeof(struct PFX_eckd_data); 2773 } else { 2774 define_extent(ccw++, (struct DE_eckd_data *) data, 2775 fdata->start_unit, fdata->stop_unit, 2776 DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 2777 /* grant subsystem permission to format R0 */ 2778 if (r0_perm) 2779 ((struct DE_eckd_data *) data) 2780 ->ga_extended |= 0x04; 2781 data += sizeof(struct DE_eckd_data); 2782 } 2783 ccw[-1].flags |= CCW_FLAG_CC; 2784 locate_record(ccw++, (struct LO_eckd_data *) data, 2785 fdata->start_unit, 0, rpt*nr_tracks, 2786 DASD_ECKD_CCW_WRITE_CKD, base, 2787 fdata->blksize); 2788 data += sizeof(struct LO_eckd_data); 2789 break; 2790 case 0x01: /* Write record zero + format track. */ 2791 if (use_prefix) { 2792 prefix(ccw++, (struct PFX_eckd_data *) data, 2793 fdata->start_unit, fdata->stop_unit, 2794 DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2795 base, startdev); 2796 data += sizeof(struct PFX_eckd_data); 2797 } else { 2798 define_extent(ccw++, (struct DE_eckd_data *) data, 2799 fdata->start_unit, fdata->stop_unit, 2800 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); 2801 data += sizeof(struct DE_eckd_data); 2802 } 2803 ccw[-1].flags |= CCW_FLAG_CC; 2804 locate_record(ccw++, (struct LO_eckd_data *) data, 2805 fdata->start_unit, 0, rpt * nr_tracks + 1, 2806 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2807 base->block->bp_block); 2808 data += sizeof(struct LO_eckd_data); 2809 break; 2810 case 0x04: /* Invalidate track. */ 2811 if (use_prefix) { 2812 prefix(ccw++, (struct PFX_eckd_data *) data, 2813 fdata->start_unit, fdata->stop_unit, 2814 DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2815 data += sizeof(struct PFX_eckd_data); 2816 } else { 2817 define_extent(ccw++, (struct DE_eckd_data *) data, 2818 fdata->start_unit, fdata->stop_unit, 2819 DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 2820 data += sizeof(struct DE_eckd_data); 2821 } 2822 ccw[-1].flags |= CCW_FLAG_CC; 2823 locate_record(ccw++, (struct LO_eckd_data *) data, 2824 fdata->start_unit, 0, 1, 2825 DASD_ECKD_CCW_WRITE_CKD, base, 8); 2826 data += sizeof(struct LO_eckd_data); 2827 break; 2828 } 2829 2830 for (j = 0; j < nr_tracks; j++) { 2831 /* calculate cylinder and head for the current track */ 2832 set_ch_t(&address, 2833 (fdata->start_unit + j) / 2834 base_priv->rdc_data.trk_per_cyl, 2835 (fdata->start_unit + j) % 2836 base_priv->rdc_data.trk_per_cyl); 2837 if (intensity & 0x01) { /* write record zero */ 2838 ect = (struct eckd_count *) data; 2839 data += sizeof(struct eckd_count); 2840 ect->cyl = address.cyl; 2841 ect->head = address.head; 2842 ect->record = 0; 2843 ect->kl = 0; 2844 ect->dl = 8; 2845 ccw[-1].flags |= CCW_FLAG_CC; 2846 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 2847 ccw->flags = CCW_FLAG_SLI; 2848 ccw->count = 8; 2849 ccw->cda = virt_to_dma32(ect); 2850 ccw++; 2851 } 2852 if ((intensity & ~0x08) & 0x04) { /* erase track */ 2853 ect = (struct eckd_count *) data; 2854 data += sizeof(struct eckd_count); 2855 ect->cyl = address.cyl; 2856 ect->head = address.head; 2857 ect->record = 1; 2858 ect->kl = 0; 2859 ect->dl = 0; 2860 ccw[-1].flags |= CCW_FLAG_CC; 2861 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 2862 ccw->flags = CCW_FLAG_SLI; 2863 ccw->count = 8; 2864 ccw->cda = virt_to_dma32(ect); 2865 } else { /* write remaining records */ 2866 for (i = 0; i < rpt; i++) { 2867 ect = (struct eckd_count *) data; 2868 data += sizeof(struct eckd_count); 2869 ect->cyl = address.cyl; 2870 ect->head = address.head; 2871 ect->record = i + 1; 2872 ect->kl = 0; 2873 ect->dl = fdata->blksize; 2874 /* 2875 * Check for special tracks 0-1 2876 * when formatting CDL 2877 */ 2878 if ((intensity & 0x08) && 2879 address.cyl == 0 && address.head == 0) { 2880 if (i < 3) { 2881 ect->kl = 4; 2882 ect->dl = sizes_trk0[i] - 4; 2883 } 2884 } 2885 if ((intensity & 0x08) && 2886 address.cyl == 0 && address.head == 1) { 2887 ect->kl = 44; 2888 ect->dl = LABEL_SIZE - 44; 2889 } 2890 ccw[-1].flags |= CCW_FLAG_CC; 2891 if (i != 0 || j == 0) 2892 ccw->cmd_code = 2893 DASD_ECKD_CCW_WRITE_CKD; 2894 else 2895 ccw->cmd_code = 2896 DASD_ECKD_CCW_WRITE_CKD_MT; 2897 ccw->flags = CCW_FLAG_SLI; 2898 ccw->count = 8; 2899 ccw->cda = virt_to_dma32(ect); 2900 ccw++; 2901 } 2902 } 2903 } 2904 2905 fcp->startdev = startdev; 2906 fcp->memdev = startdev; 2907 fcp->basedev = base; 2908 fcp->retries = 256; 2909 fcp->expires = startdev->default_expires * HZ; 2910 fcp->buildclk = get_tod_clock(); 2911 fcp->status = DASD_CQR_FILLED; 2912 2913 return fcp; 2914 } 2915 2916 /* 2917 * Wrapper function to build a CCW request depending on input data 2918 */ 2919 static struct dasd_ccw_req * dasd_eckd_format_build_ccw_req(struct dasd_device * base,struct format_data_t * fdata,int enable_pav,int tpm,struct eckd_count * fmt_buffer,int rpt)2920 dasd_eckd_format_build_ccw_req(struct dasd_device *base, 2921 struct format_data_t *fdata, int enable_pav, 2922 int tpm, struct eckd_count *fmt_buffer, int rpt) 2923 { 2924 struct dasd_ccw_req *ccw_req; 2925 2926 if (!fmt_buffer) { 2927 ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav); 2928 } else { 2929 if (tpm) 2930 ccw_req = dasd_eckd_build_check_tcw(base, fdata, 2931 enable_pav, 2932 fmt_buffer, rpt); 2933 else 2934 ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 2935 fmt_buffer, rpt); 2936 } 2937 2938 return ccw_req; 2939 } 2940 2941 /* 2942 * Sanity checks on format_data 2943 */ dasd_eckd_format_sanity_checks(struct dasd_device * base,struct format_data_t * fdata)2944 static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2945 struct format_data_t *fdata) 2946 { 2947 struct dasd_eckd_private *private = base->private; 2948 2949 if (fdata->start_unit >= 2950 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2951 dev_warn(&base->cdev->dev, 2952 "Start track number %u used in formatting is too big\n", 2953 fdata->start_unit); 2954 return -EINVAL; 2955 } 2956 if (fdata->stop_unit >= 2957 (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2958 dev_warn(&base->cdev->dev, 2959 "Stop track number %u used in formatting is too big\n", 2960 fdata->stop_unit); 2961 return -EINVAL; 2962 } 2963 if (fdata->start_unit > fdata->stop_unit) { 2964 dev_warn(&base->cdev->dev, 2965 "Start track %u used in formatting exceeds end track\n", 2966 fdata->start_unit); 2967 return -EINVAL; 2968 } 2969 if (dasd_check_blocksize(fdata->blksize) != 0) { 2970 dev_warn(&base->cdev->dev, 2971 "The DASD cannot be formatted with block size %u\n", 2972 fdata->blksize); 2973 return -EINVAL; 2974 } 2975 return 0; 2976 } 2977 2978 /* 2979 * This function will process format_data originally coming from an IOCTL 2980 */ dasd_eckd_format_process_data(struct dasd_device * base,struct format_data_t * fdata,int enable_pav,int tpm,struct eckd_count * fmt_buffer,int rpt,struct irb * irb)2981 static int dasd_eckd_format_process_data(struct dasd_device *base, 2982 struct format_data_t *fdata, 2983 int enable_pav, int tpm, 2984 struct eckd_count *fmt_buffer, int rpt, 2985 struct irb *irb) 2986 { 2987 struct dasd_eckd_private *private = base->private; 2988 struct dasd_ccw_req *cqr, *n; 2989 struct list_head format_queue; 2990 struct dasd_device *device; 2991 char *sense = NULL; 2992 int old_start, old_stop, format_step; 2993 int step, retry; 2994 int rc; 2995 2996 rc = dasd_eckd_format_sanity_checks(base, fdata); 2997 if (rc) 2998 return rc; 2999 3000 INIT_LIST_HEAD(&format_queue); 3001 3002 old_start = fdata->start_unit; 3003 old_stop = fdata->stop_unit; 3004 3005 if (!tpm && fmt_buffer != NULL) { 3006 /* Command Mode / Format Check */ 3007 format_step = 1; 3008 } else if (tpm && fmt_buffer != NULL) { 3009 /* Transport Mode / Format Check */ 3010 format_step = DASD_CQR_MAX_CCW / rpt; 3011 } else { 3012 /* Normal Formatting */ 3013 format_step = DASD_CQR_MAX_CCW / 3014 recs_per_track(&private->rdc_data, 0, fdata->blksize); 3015 } 3016 3017 do { 3018 retry = 0; 3019 while (fdata->start_unit <= old_stop) { 3020 step = fdata->stop_unit - fdata->start_unit + 1; 3021 if (step > format_step) { 3022 fdata->stop_unit = 3023 fdata->start_unit + format_step - 1; 3024 } 3025 3026 cqr = dasd_eckd_format_build_ccw_req(base, fdata, 3027 enable_pav, tpm, 3028 fmt_buffer, rpt); 3029 if (IS_ERR(cqr)) { 3030 rc = PTR_ERR(cqr); 3031 if (rc == -ENOMEM) { 3032 if (list_empty(&format_queue)) 3033 goto out; 3034 /* 3035 * not enough memory available, start 3036 * requests retry after first requests 3037 * were finished 3038 */ 3039 retry = 1; 3040 break; 3041 } 3042 goto out_err; 3043 } 3044 list_add_tail(&cqr->blocklist, &format_queue); 3045 3046 if (fmt_buffer) { 3047 step = fdata->stop_unit - fdata->start_unit + 1; 3048 fmt_buffer += rpt * step; 3049 } 3050 fdata->start_unit = fdata->stop_unit + 1; 3051 fdata->stop_unit = old_stop; 3052 } 3053 3054 rc = dasd_sleep_on_queue(&format_queue); 3055 3056 out_err: 3057 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 3058 device = cqr->startdev; 3059 private = device->private; 3060 3061 if (cqr->status == DASD_CQR_FAILED) { 3062 /* 3063 * Only get sense data if called by format 3064 * check 3065 */ 3066 if (fmt_buffer && irb) { 3067 sense = dasd_get_sense(&cqr->irb); 3068 memcpy(irb, &cqr->irb, sizeof(*irb)); 3069 } 3070 rc = -EIO; 3071 } 3072 list_del_init(&cqr->blocklist); 3073 dasd_ffree_request(cqr, device); 3074 private->count--; 3075 } 3076 3077 if (rc && rc != -EIO) 3078 goto out; 3079 if (rc == -EIO) { 3080 /* 3081 * In case fewer than the expected records are on the 3082 * track, we will most likely get a 'No Record Found' 3083 * error (in command mode) or a 'File Protected' error 3084 * (in transport mode). Those particular cases shouldn't 3085 * pass the -EIO to the IOCTL, therefore reset the rc 3086 * and continue. 3087 */ 3088 if (sense && 3089 (sense[1] & SNS1_NO_REC_FOUND || 3090 sense[1] & SNS1_FILE_PROTECTED)) 3091 retry = 1; 3092 else 3093 goto out; 3094 } 3095 3096 } while (retry); 3097 3098 out: 3099 fdata->start_unit = old_start; 3100 fdata->stop_unit = old_stop; 3101 3102 return rc; 3103 } 3104 dasd_eckd_format_device(struct dasd_device * base,struct format_data_t * fdata,int enable_pav)3105 static int dasd_eckd_format_device(struct dasd_device *base, 3106 struct format_data_t *fdata, int enable_pav) 3107 { 3108 return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 3109 0, NULL); 3110 } 3111 test_and_set_format_track(struct dasd_format_entry * to_format,struct dasd_ccw_req * cqr)3112 static bool test_and_set_format_track(struct dasd_format_entry *to_format, 3113 struct dasd_ccw_req *cqr) 3114 { 3115 struct dasd_block *block = cqr->block; 3116 struct dasd_format_entry *format; 3117 unsigned long flags; 3118 bool rc = false; 3119 3120 spin_lock_irqsave(&block->format_lock, flags); 3121 if (cqr->trkcount != atomic_read(&block->trkcount)) { 3122 /* 3123 * The number of formatted tracks has changed after request 3124 * start and we can not tell if the current track was involved. 3125 * To avoid data corruption treat it as if the current track is 3126 * involved 3127 */ 3128 rc = true; 3129 goto out; 3130 } 3131 list_for_each_entry(format, &block->format_list, list) { 3132 if (format->track == to_format->track) { 3133 rc = true; 3134 goto out; 3135 } 3136 } 3137 list_add_tail(&to_format->list, &block->format_list); 3138 3139 out: 3140 spin_unlock_irqrestore(&block->format_lock, flags); 3141 return rc; 3142 } 3143 clear_format_track(struct dasd_format_entry * format,struct dasd_block * block)3144 static void clear_format_track(struct dasd_format_entry *format, 3145 struct dasd_block *block) 3146 { 3147 unsigned long flags; 3148 3149 spin_lock_irqsave(&block->format_lock, flags); 3150 atomic_inc(&block->trkcount); 3151 list_del_init(&format->list); 3152 spin_unlock_irqrestore(&block->format_lock, flags); 3153 } 3154 3155 /* 3156 * Callback function to free ESE format requests. 3157 */ dasd_eckd_ese_format_cb(struct dasd_ccw_req * cqr,void * data)3158 static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data) 3159 { 3160 struct dasd_device *device = cqr->startdev; 3161 struct dasd_eckd_private *private = device->private; 3162 struct dasd_format_entry *format = data; 3163 3164 clear_format_track(format, cqr->basedev->block); 3165 private->count--; 3166 dasd_ffree_request(cqr, device); 3167 } 3168 3169 static struct dasd_ccw_req * dasd_eckd_ese_format(struct dasd_device * startdev,struct dasd_ccw_req * cqr,struct irb * irb)3170 dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr, 3171 struct irb *irb) 3172 { 3173 struct dasd_eckd_private *private; 3174 struct dasd_format_entry *format; 3175 struct format_data_t fdata; 3176 unsigned int recs_per_trk; 3177 struct dasd_ccw_req *fcqr; 3178 struct dasd_device *base; 3179 struct dasd_block *block; 3180 unsigned int blksize; 3181 struct request *req; 3182 sector_t first_trk; 3183 sector_t last_trk; 3184 sector_t curr_trk; 3185 int rc; 3186 3187 req = dasd_get_callback_data(cqr); 3188 block = cqr->block; 3189 base = block->base; 3190 private = base->private; 3191 blksize = block->bp_block; 3192 recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3193 format = &startdev->format_entry; 3194 3195 first_trk = blk_rq_pos(req) >> block->s2b_shift; 3196 sector_div(first_trk, recs_per_trk); 3197 last_trk = 3198 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3199 sector_div(last_trk, recs_per_trk); 3200 rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 3201 if (rc) 3202 return ERR_PTR(rc); 3203 3204 if (curr_trk < first_trk || curr_trk > last_trk) { 3205 DBF_DEV_EVENT(DBF_WARNING, startdev, 3206 "ESE error track %llu not within range %llu - %llu\n", 3207 curr_trk, first_trk, last_trk); 3208 return ERR_PTR(-EINVAL); 3209 } 3210 format->track = curr_trk; 3211 /* test if track is already in formatting by another thread */ 3212 if (test_and_set_format_track(format, cqr)) { 3213 /* this is no real error so do not count down retries */ 3214 cqr->retries++; 3215 return ERR_PTR(-EEXIST); 3216 } 3217 3218 fdata.start_unit = curr_trk; 3219 fdata.stop_unit = curr_trk; 3220 fdata.blksize = blksize; 3221 fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0; 3222 3223 rc = dasd_eckd_format_sanity_checks(base, &fdata); 3224 if (rc) 3225 return ERR_PTR(-EINVAL); 3226 3227 /* 3228 * We're building the request with PAV disabled as we're reusing 3229 * the former startdev. 3230 */ 3231 fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0); 3232 if (IS_ERR(fcqr)) 3233 return fcqr; 3234 3235 fcqr->callback = dasd_eckd_ese_format_cb; 3236 fcqr->callback_data = (void *) format; 3237 3238 return fcqr; 3239 } 3240 3241 /* 3242 * When data is read from an unformatted area of an ESE volume, this function 3243 * returns zeroed data and thereby mimics a read of zero data. 3244 * 3245 * The first unformatted track is the one that got the NRF error, the address is 3246 * encoded in the sense data. 3247 * 3248 * All tracks before have returned valid data and should not be touched. 3249 * All tracks after the unformatted track might be formatted or not. This is 3250 * currently not known, remember the processed data and return the remainder of 3251 * the request to the blocklayer in __dasd_cleanup_cqr(). 3252 */ dasd_eckd_ese_read(struct dasd_ccw_req * cqr,struct irb * irb)3253 static int dasd_eckd_ese_read(struct dasd_ccw_req *cqr, struct irb *irb) 3254 { 3255 struct dasd_eckd_private *private; 3256 sector_t first_trk, last_trk; 3257 sector_t first_blk, last_blk; 3258 unsigned int blksize, off; 3259 unsigned int recs_per_trk; 3260 struct dasd_device *base; 3261 struct req_iterator iter; 3262 struct dasd_block *block; 3263 unsigned int skip_block; 3264 unsigned int blk_count; 3265 struct request *req; 3266 struct bio_vec bv; 3267 sector_t curr_trk; 3268 sector_t end_blk; 3269 char *dst; 3270 int rc; 3271 3272 req = (struct request *) cqr->callback_data; 3273 base = cqr->block->base; 3274 blksize = base->block->bp_block; 3275 block = cqr->block; 3276 private = base->private; 3277 skip_block = 0; 3278 blk_count = 0; 3279 3280 recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 3281 first_trk = first_blk = blk_rq_pos(req) >> block->s2b_shift; 3282 sector_div(first_trk, recs_per_trk); 3283 last_trk = last_blk = 3284 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3285 sector_div(last_trk, recs_per_trk); 3286 rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 3287 if (rc) 3288 return rc; 3289 3290 /* sanity check if the current track from sense data is valid */ 3291 if (curr_trk < first_trk || curr_trk > last_trk) { 3292 DBF_DEV_EVENT(DBF_WARNING, base, 3293 "ESE error track %llu not within range %llu - %llu\n", 3294 curr_trk, first_trk, last_trk); 3295 return -EINVAL; 3296 } 3297 3298 /* 3299 * if not the first track got the NRF error we have to skip over valid 3300 * blocks 3301 */ 3302 if (curr_trk != first_trk) 3303 skip_block = curr_trk * recs_per_trk - first_blk; 3304 3305 /* we have no information beyond the current track */ 3306 end_blk = (curr_trk + 1) * recs_per_trk; 3307 3308 rq_for_each_segment(bv, req, iter) { 3309 dst = bvec_virt(&bv); 3310 for (off = 0; off < bv.bv_len; off += blksize) { 3311 if (first_blk + blk_count >= end_blk) { 3312 cqr->proc_bytes = blk_count * blksize; 3313 return 0; 3314 } 3315 if (dst && !skip_block) 3316 memset(dst, 0, blksize); 3317 else 3318 skip_block--; 3319 dst += blksize; 3320 blk_count++; 3321 } 3322 } 3323 return 0; 3324 } 3325 3326 /* 3327 * Helper function to count consecutive records of a single track. 3328 */ dasd_eckd_count_records(struct eckd_count * fmt_buffer,int start,int max)3329 static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 3330 int max) 3331 { 3332 int head; 3333 int i; 3334 3335 head = fmt_buffer[start].head; 3336 3337 /* 3338 * There are 3 conditions where we stop counting: 3339 * - if data reoccurs (same head and record may reoccur), which may 3340 * happen due to the way DASD_ECKD_CCW_READ_COUNT works 3341 * - when the head changes, because we're iterating over several tracks 3342 * then (DASD_ECKD_CCW_READ_COUNT_MT) 3343 * - when we've reached the end of sensible data in the buffer (the 3344 * record will be 0 then) 3345 */ 3346 for (i = start; i < max; i++) { 3347 if (i > start) { 3348 if ((fmt_buffer[i].head == head && 3349 fmt_buffer[i].record == 1) || 3350 fmt_buffer[i].head != head || 3351 fmt_buffer[i].record == 0) 3352 break; 3353 } 3354 } 3355 3356 return i - start; 3357 } 3358 3359 /* 3360 * Evaluate a given range of tracks. Data like number of records, blocksize, 3361 * record ids, and key length are compared with expected data. 3362 * 3363 * If a mismatch occurs, the corresponding error bit is set, as well as 3364 * additional information, depending on the error. 3365 */ dasd_eckd_format_evaluate_tracks(struct eckd_count * fmt_buffer,struct format_check_t * cdata,int rpt_max,int rpt_exp,int trk_per_cyl,int tpm)3366 static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 3367 struct format_check_t *cdata, 3368 int rpt_max, int rpt_exp, 3369 int trk_per_cyl, int tpm) 3370 { 3371 struct ch_t geo; 3372 int max_entries; 3373 int count = 0; 3374 int trkcount; 3375 int blksize; 3376 int pos = 0; 3377 int i, j; 3378 int kl; 3379 3380 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 3381 max_entries = trkcount * rpt_max; 3382 3383 for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 3384 /* Calculate the correct next starting position in the buffer */ 3385 if (tpm) { 3386 while (fmt_buffer[pos].record == 0 && 3387 fmt_buffer[pos].dl == 0) { 3388 if (pos++ > max_entries) 3389 break; 3390 } 3391 } else { 3392 if (i != cdata->expect.start_unit) 3393 pos += rpt_max - count; 3394 } 3395 3396 /* Calculate the expected geo values for the current track */ 3397 set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 3398 3399 /* Count and check number of records */ 3400 count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 3401 3402 if (count < rpt_exp) { 3403 cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 3404 break; 3405 } 3406 if (count > rpt_exp) { 3407 cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 3408 break; 3409 } 3410 3411 for (j = 0; j < count; j++, pos++) { 3412 blksize = cdata->expect.blksize; 3413 kl = 0; 3414 3415 /* 3416 * Set special values when checking CDL formatted 3417 * devices. 3418 */ 3419 if ((cdata->expect.intensity & 0x08) && 3420 geo.cyl == 0 && geo.head == 0) { 3421 if (j < 3) { 3422 blksize = sizes_trk0[j] - 4; 3423 kl = 4; 3424 } 3425 } 3426 if ((cdata->expect.intensity & 0x08) && 3427 geo.cyl == 0 && geo.head == 1) { 3428 blksize = LABEL_SIZE - 44; 3429 kl = 44; 3430 } 3431 3432 /* Check blocksize */ 3433 if (fmt_buffer[pos].dl != blksize) { 3434 cdata->result = DASD_FMT_ERR_BLKSIZE; 3435 goto out; 3436 } 3437 /* Check if key length is 0 */ 3438 if (fmt_buffer[pos].kl != kl) { 3439 cdata->result = DASD_FMT_ERR_KEY_LENGTH; 3440 goto out; 3441 } 3442 /* Check if record_id is correct */ 3443 if (fmt_buffer[pos].cyl != geo.cyl || 3444 fmt_buffer[pos].head != geo.head || 3445 fmt_buffer[pos].record != (j + 1)) { 3446 cdata->result = DASD_FMT_ERR_RECORD_ID; 3447 goto out; 3448 } 3449 } 3450 } 3451 3452 out: 3453 /* 3454 * In case of no errors, we need to decrease by one 3455 * to get the correct positions. 3456 */ 3457 if (!cdata->result) { 3458 i--; 3459 pos--; 3460 } 3461 3462 cdata->unit = i; 3463 cdata->num_records = count; 3464 cdata->rec = fmt_buffer[pos].record; 3465 cdata->blksize = fmt_buffer[pos].dl; 3466 cdata->key_length = fmt_buffer[pos].kl; 3467 } 3468 3469 /* 3470 * Check the format of a range of tracks of a DASD. 3471 */ dasd_eckd_check_device_format(struct dasd_device * base,struct format_check_t * cdata,int enable_pav)3472 static int dasd_eckd_check_device_format(struct dasd_device *base, 3473 struct format_check_t *cdata, 3474 int enable_pav) 3475 { 3476 struct dasd_eckd_private *private = base->private; 3477 struct eckd_count *fmt_buffer; 3478 struct irb irb; 3479 int rpt_max, rpt_exp; 3480 int fmt_buffer_size; 3481 int trk_per_cyl; 3482 int trkcount; 3483 int tpm = 0; 3484 int rc; 3485 3486 trk_per_cyl = private->rdc_data.trk_per_cyl; 3487 3488 /* Get maximum and expected amount of records per track */ 3489 rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 3490 rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 3491 3492 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 3493 fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 3494 3495 fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 3496 if (!fmt_buffer) 3497 return -ENOMEM; 3498 3499 /* 3500 * A certain FICON feature subset is needed to operate in transport 3501 * mode. Additionally, the support for transport mode is implicitly 3502 * checked by comparing the buffer size with fcx_max_data. As long as 3503 * the buffer size is smaller we can operate in transport mode and 3504 * process multiple tracks. If not, only one track at once is being 3505 * processed using command mode. 3506 */ 3507 if ((private->features.feature[40] & 0x04) && 3508 fmt_buffer_size <= private->fcx_max_data) 3509 tpm = 1; 3510 3511 rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 3512 tpm, fmt_buffer, rpt_max, &irb); 3513 if (rc && rc != -EIO) 3514 goto out; 3515 if (rc == -EIO) { 3516 /* 3517 * If our first attempt with transport mode enabled comes back 3518 * with an incorrect length error, we're going to retry the 3519 * check with command mode. 3520 */ 3521 if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 3522 tpm = 0; 3523 rc = dasd_eckd_format_process_data(base, &cdata->expect, 3524 enable_pav, tpm, 3525 fmt_buffer, rpt_max, 3526 &irb); 3527 if (rc) 3528 goto out; 3529 } else { 3530 goto out; 3531 } 3532 } 3533 3534 dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 3535 trk_per_cyl, tpm); 3536 3537 out: 3538 kfree(fmt_buffer); 3539 3540 return rc; 3541 } 3542 dasd_eckd_handle_terminated_request(struct dasd_ccw_req * cqr)3543 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 3544 { 3545 if (cqr->retries < 0) { 3546 cqr->status = DASD_CQR_FAILED; 3547 return; 3548 } 3549 cqr->status = DASD_CQR_FILLED; 3550 if (cqr->block && (cqr->startdev != cqr->block->base)) { 3551 dasd_eckd_reset_ccw_to_base_io(cqr); 3552 cqr->startdev = cqr->block->base; 3553 cqr->lpm = dasd_path_get_opm(cqr->block->base); 3554 } 3555 }; 3556 3557 static dasd_erp_fn_t dasd_eckd_erp_action(struct dasd_ccw_req * cqr)3558 dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 3559 { 3560 struct dasd_device *device = (struct dasd_device *) cqr->startdev; 3561 struct ccw_device *cdev = device->cdev; 3562 3563 switch (cdev->id.cu_type) { 3564 case 0x3990: 3565 case 0x2105: 3566 case 0x2107: 3567 case 0x1750: 3568 return dasd_3990_erp_action; 3569 case 0x9343: 3570 case 0x3880: 3571 default: 3572 return dasd_default_erp_action; 3573 } 3574 } 3575 3576 static dasd_erp_fn_t dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)3577 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 3578 { 3579 return dasd_default_erp_postaction; 3580 } 3581 dasd_eckd_check_for_device_change(struct dasd_device * device,struct dasd_ccw_req * cqr,struct irb * irb)3582 static void dasd_eckd_check_for_device_change(struct dasd_device *device, 3583 struct dasd_ccw_req *cqr, 3584 struct irb *irb) 3585 { 3586 char mask; 3587 char *sense = NULL; 3588 struct dasd_eckd_private *private = device->private; 3589 3590 /* first of all check for state change pending interrupt */ 3591 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 3592 if ((scsw_dstat(&irb->scsw) & mask) == mask) { 3593 /* 3594 * for alias only, not in offline processing 3595 * and only if not suspended 3596 */ 3597 if (!device->block && private->lcu && 3598 device->state == DASD_STATE_ONLINE && 3599 !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 3600 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 3601 /* schedule worker to reload device */ 3602 dasd_reload_device(device); 3603 } 3604 dasd_generic_handle_state_change(device); 3605 return; 3606 } 3607 3608 sense = dasd_get_sense(irb); 3609 if (!sense) 3610 return; 3611 3612 /* summary unit check */ 3613 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 3614 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 3615 if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 3616 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3617 "eckd suc: device already notified"); 3618 return; 3619 } 3620 sense = dasd_get_sense(irb); 3621 if (!sense) { 3622 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3623 "eckd suc: no reason code available"); 3624 clear_bit(DASD_FLAG_SUC, &device->flags); 3625 return; 3626 3627 } 3628 private->suc_reason = sense[8]; 3629 DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 3630 "eckd handle summary unit check: reason", 3631 private->suc_reason); 3632 dasd_get_device(device); 3633 if (!schedule_work(&device->suc_work)) 3634 dasd_put_device(device); 3635 3636 return; 3637 } 3638 3639 /* service information message SIM */ 3640 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3641 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3642 dasd_3990_erp_handle_sim(device, sense); 3643 return; 3644 } 3645 3646 /* loss of device reservation is handled via base devices only 3647 * as alias devices may be used with several bases 3648 */ 3649 if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3650 (sense[7] == 0x3F) && 3651 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 3652 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 3653 if (device->features & DASD_FEATURE_FAILONSLCK) 3654 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 3655 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 3656 dev_err(&device->cdev->dev, 3657 "The device reservation was lost\n"); 3658 } 3659 } 3660 dasd_eckd_ras_sanity_checks(struct dasd_device * device,unsigned int first_trk,unsigned int last_trk)3661 static int dasd_eckd_ras_sanity_checks(struct dasd_device *device, 3662 unsigned int first_trk, 3663 unsigned int last_trk) 3664 { 3665 struct dasd_eckd_private *private = device->private; 3666 unsigned int trks_per_vol; 3667 int rc = 0; 3668 3669 trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl; 3670 3671 if (first_trk >= trks_per_vol) { 3672 dev_warn(&device->cdev->dev, 3673 "Start track number %u used in the space release command is too big\n", 3674 first_trk); 3675 rc = -EINVAL; 3676 } else if (last_trk >= trks_per_vol) { 3677 dev_warn(&device->cdev->dev, 3678 "Stop track number %u used in the space release command is too big\n", 3679 last_trk); 3680 rc = -EINVAL; 3681 } else if (first_trk > last_trk) { 3682 dev_warn(&device->cdev->dev, 3683 "Start track %u used in the space release command exceeds the end track\n", 3684 first_trk); 3685 rc = -EINVAL; 3686 } 3687 return rc; 3688 } 3689 3690 /* 3691 * Helper function to count the amount of involved extents within a given range 3692 * with extent alignment in mind. 3693 */ count_exts(unsigned int from,unsigned int to,int trks_per_ext)3694 static int count_exts(unsigned int from, unsigned int to, int trks_per_ext) 3695 { 3696 int cur_pos = 0; 3697 int count = 0; 3698 int tmp; 3699 3700 if (from == to) 3701 return 1; 3702 3703 /* Count first partial extent */ 3704 if (from % trks_per_ext != 0) { 3705 tmp = from + trks_per_ext - (from % trks_per_ext) - 1; 3706 if (tmp > to) 3707 tmp = to; 3708 cur_pos = tmp - from + 1; 3709 count++; 3710 } 3711 /* Count full extents */ 3712 if (to - (from + cur_pos) + 1 >= trks_per_ext) { 3713 tmp = to - ((to - trks_per_ext + 1) % trks_per_ext); 3714 count += (tmp - (from + cur_pos) + 1) / trks_per_ext; 3715 cur_pos = tmp; 3716 } 3717 /* Count last partial extent */ 3718 if (cur_pos < to) 3719 count++; 3720 3721 return count; 3722 } 3723 dasd_in_copy_relation(struct dasd_device * device)3724 static int dasd_in_copy_relation(struct dasd_device *device) 3725 { 3726 struct dasd_pprc_data_sc4 *temp; 3727 int rc; 3728 3729 if (!dasd_eckd_pprc_enabled(device)) 3730 return 0; 3731 3732 temp = kzalloc(sizeof(*temp), GFP_KERNEL); 3733 if (!temp) 3734 return -ENOMEM; 3735 3736 rc = dasd_eckd_query_pprc_status(device, temp); 3737 if (!rc) 3738 rc = temp->dev_info[0].state; 3739 3740 kfree(temp); 3741 return rc; 3742 } 3743 3744 /* 3745 * Release allocated space for a given range or an entire volume. 3746 */ 3747 static struct dasd_ccw_req * dasd_eckd_dso_ras(struct dasd_device * device,struct dasd_block * block,struct request * req,unsigned int first_trk,unsigned int last_trk,int by_extent)3748 dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, 3749 struct request *req, unsigned int first_trk, 3750 unsigned int last_trk, int by_extent) 3751 { 3752 struct dasd_eckd_private *private = device->private; 3753 struct dasd_dso_ras_ext_range *ras_range; 3754 struct dasd_rssd_features *features; 3755 struct dasd_dso_ras_data *ras_data; 3756 u16 heads, beg_head, end_head; 3757 int cur_to_trk, cur_from_trk; 3758 struct dasd_ccw_req *cqr; 3759 u32 beg_cyl, end_cyl; 3760 int copy_relation; 3761 struct ccw1 *ccw; 3762 int trks_per_ext; 3763 size_t ras_size; 3764 size_t size; 3765 int nr_exts; 3766 void *rq; 3767 int i; 3768 3769 if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk)) 3770 return ERR_PTR(-EINVAL); 3771 3772 copy_relation = dasd_in_copy_relation(device); 3773 if (copy_relation < 0) 3774 return ERR_PTR(copy_relation); 3775 3776 rq = req ? blk_mq_rq_to_pdu(req) : NULL; 3777 3778 features = &private->features; 3779 3780 trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 3781 nr_exts = 0; 3782 if (by_extent) 3783 nr_exts = count_exts(first_trk, last_trk, trks_per_ext); 3784 ras_size = sizeof(*ras_data); 3785 size = ras_size + (nr_exts * sizeof(*ras_range)); 3786 3787 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq); 3788 if (IS_ERR(cqr)) { 3789 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 3790 "Could not allocate RAS request"); 3791 return cqr; 3792 } 3793 3794 ras_data = cqr->data; 3795 memset(ras_data, 0, size); 3796 3797 ras_data->order = DSO_ORDER_RAS; 3798 ras_data->flags.vol_type = 0; /* CKD volume */ 3799 /* Release specified extents or entire volume */ 3800 ras_data->op_flags.by_extent = by_extent; 3801 /* 3802 * This bit guarantees initialisation of tracks within an extent that is 3803 * not fully specified, but is only supported with a certain feature 3804 * subset and for devices not in a copy relation. 3805 */ 3806 if (features->feature[56] & 0x01 && !copy_relation) 3807 ras_data->op_flags.guarantee_init = 1; 3808 3809 ras_data->lss = private->conf.ned->ID; 3810 ras_data->dev_addr = private->conf.ned->unit_addr; 3811 ras_data->nr_exts = nr_exts; 3812 3813 if (by_extent) { 3814 heads = private->rdc_data.trk_per_cyl; 3815 cur_from_trk = first_trk; 3816 cur_to_trk = first_trk + trks_per_ext - 3817 (first_trk % trks_per_ext) - 1; 3818 if (cur_to_trk > last_trk) 3819 cur_to_trk = last_trk; 3820 ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size); 3821 3822 for (i = 0; i < nr_exts; i++) { 3823 beg_cyl = cur_from_trk / heads; 3824 beg_head = cur_from_trk % heads; 3825 end_cyl = cur_to_trk / heads; 3826 end_head = cur_to_trk % heads; 3827 3828 set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head); 3829 set_ch_t(&ras_range->end_ext, end_cyl, end_head); 3830 3831 cur_from_trk = cur_to_trk + 1; 3832 cur_to_trk = cur_from_trk + trks_per_ext - 1; 3833 if (cur_to_trk > last_trk) 3834 cur_to_trk = last_trk; 3835 ras_range++; 3836 } 3837 } 3838 3839 ccw = cqr->cpaddr; 3840 ccw->cda = virt_to_dma32(cqr->data); 3841 ccw->cmd_code = DASD_ECKD_CCW_DSO; 3842 ccw->count = size; 3843 3844 cqr->startdev = device; 3845 cqr->memdev = device; 3846 cqr->block = block; 3847 cqr->retries = 256; 3848 cqr->expires = device->default_expires * HZ; 3849 cqr->buildclk = get_tod_clock(); 3850 cqr->status = DASD_CQR_FILLED; 3851 3852 return cqr; 3853 } 3854 dasd_eckd_release_space_full(struct dasd_device * device)3855 static int dasd_eckd_release_space_full(struct dasd_device *device) 3856 { 3857 struct dasd_ccw_req *cqr; 3858 int rc; 3859 3860 cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0); 3861 if (IS_ERR(cqr)) 3862 return PTR_ERR(cqr); 3863 3864 rc = dasd_sleep_on_interruptible(cqr); 3865 3866 dasd_sfree_request(cqr, cqr->memdev); 3867 3868 return rc; 3869 } 3870 dasd_eckd_release_space_trks(struct dasd_device * device,unsigned int from,unsigned int to)3871 static int dasd_eckd_release_space_trks(struct dasd_device *device, 3872 unsigned int from, unsigned int to) 3873 { 3874 struct dasd_eckd_private *private = device->private; 3875 struct dasd_block *block = device->block; 3876 struct dasd_ccw_req *cqr, *n; 3877 struct list_head ras_queue; 3878 unsigned int device_exts; 3879 int trks_per_ext; 3880 int stop, step; 3881 int cur_pos; 3882 int rc = 0; 3883 int retry; 3884 3885 INIT_LIST_HEAD(&ras_queue); 3886 3887 device_exts = private->real_cyl / dasd_eckd_ext_size(device); 3888 trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 3889 3890 /* Make sure device limits are not exceeded */ 3891 step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX); 3892 cur_pos = from; 3893 3894 do { 3895 retry = 0; 3896 while (cur_pos < to) { 3897 stop = cur_pos + step - 3898 ((cur_pos + step) % trks_per_ext) - 1; 3899 if (stop > to) 3900 stop = to; 3901 3902 cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1); 3903 if (IS_ERR(cqr)) { 3904 rc = PTR_ERR(cqr); 3905 if (rc == -ENOMEM) { 3906 if (list_empty(&ras_queue)) 3907 goto out; 3908 retry = 1; 3909 break; 3910 } 3911 goto err_out; 3912 } 3913 3914 spin_lock_irq(&block->queue_lock); 3915 list_add_tail(&cqr->blocklist, &ras_queue); 3916 spin_unlock_irq(&block->queue_lock); 3917 cur_pos = stop + 1; 3918 } 3919 3920 rc = dasd_sleep_on_queue_interruptible(&ras_queue); 3921 3922 err_out: 3923 list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) { 3924 device = cqr->startdev; 3925 private = device->private; 3926 3927 spin_lock_irq(&block->queue_lock); 3928 list_del_init(&cqr->blocklist); 3929 spin_unlock_irq(&block->queue_lock); 3930 dasd_sfree_request(cqr, device); 3931 private->count--; 3932 } 3933 } while (retry); 3934 3935 out: 3936 return rc; 3937 } 3938 dasd_eckd_release_space(struct dasd_device * device,struct format_data_t * rdata)3939 static int dasd_eckd_release_space(struct dasd_device *device, 3940 struct format_data_t *rdata) 3941 { 3942 if (rdata->intensity & DASD_FMT_INT_ESE_FULL) 3943 return dasd_eckd_release_space_full(device); 3944 else if (rdata->intensity == 0) 3945 return dasd_eckd_release_space_trks(device, rdata->start_unit, 3946 rdata->stop_unit); 3947 else 3948 return -EINVAL; 3949 } 3950 dasd_eckd_build_cp_cmd_single(struct dasd_device * startdev,struct dasd_block * block,struct request * req,sector_t first_rec,sector_t last_rec,sector_t first_trk,sector_t last_trk,unsigned int first_offs,unsigned int last_offs,unsigned int blk_per_trk,unsigned int blksize)3951 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3952 struct dasd_device *startdev, 3953 struct dasd_block *block, 3954 struct request *req, 3955 sector_t first_rec, 3956 sector_t last_rec, 3957 sector_t first_trk, 3958 sector_t last_trk, 3959 unsigned int first_offs, 3960 unsigned int last_offs, 3961 unsigned int blk_per_trk, 3962 unsigned int blksize) 3963 { 3964 struct dasd_eckd_private *private; 3965 dma64_t *idaws; 3966 struct LO_eckd_data *LO_data; 3967 struct dasd_ccw_req *cqr; 3968 struct ccw1 *ccw; 3969 struct req_iterator iter; 3970 struct bio_vec bv; 3971 char *dst; 3972 unsigned int off; 3973 int count, cidaw, cplength, datasize; 3974 sector_t recid; 3975 unsigned char cmd, rcmd; 3976 int use_prefix; 3977 struct dasd_device *basedev; 3978 3979 basedev = block->base; 3980 private = basedev->private; 3981 if (rq_data_dir(req) == READ) 3982 cmd = DASD_ECKD_CCW_READ_MT; 3983 else if (rq_data_dir(req) == WRITE) 3984 cmd = DASD_ECKD_CCW_WRITE_MT; 3985 else 3986 return ERR_PTR(-EINVAL); 3987 3988 /* Check struct bio and count the number of blocks for the request. */ 3989 count = 0; 3990 cidaw = 0; 3991 rq_for_each_segment(bv, req, iter) { 3992 if (bv.bv_len & (blksize - 1)) 3993 /* Eckd can only do full blocks. */ 3994 return ERR_PTR(-EINVAL); 3995 count += bv.bv_len >> (block->s2b_shift + 9); 3996 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 3997 cidaw += bv.bv_len >> (block->s2b_shift + 9); 3998 } 3999 /* Paranoia. */ 4000 if (count != last_rec - first_rec + 1) 4001 return ERR_PTR(-EINVAL); 4002 4003 /* use the prefix command if available */ 4004 use_prefix = private->features.feature[8] & 0x01; 4005 if (use_prefix) { 4006 /* 1x prefix + number of blocks */ 4007 cplength = 2 + count; 4008 /* 1x prefix + cidaws*sizeof(long) */ 4009 datasize = sizeof(struct PFX_eckd_data) + 4010 sizeof(struct LO_eckd_data) + 4011 cidaw * sizeof(unsigned long); 4012 } else { 4013 /* 1x define extent + 1x locate record + number of blocks */ 4014 cplength = 2 + count; 4015 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 4016 datasize = sizeof(struct DE_eckd_data) + 4017 sizeof(struct LO_eckd_data) + 4018 cidaw * sizeof(unsigned long); 4019 } 4020 /* Find out the number of additional locate record ccws for cdl. */ 4021 if (private->uses_cdl && first_rec < 2*blk_per_trk) { 4022 if (last_rec >= 2*blk_per_trk) 4023 count = 2*blk_per_trk - first_rec; 4024 cplength += count; 4025 datasize += count*sizeof(struct LO_eckd_data); 4026 } 4027 /* Allocate the ccw request. */ 4028 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 4029 startdev, blk_mq_rq_to_pdu(req)); 4030 if (IS_ERR(cqr)) 4031 return cqr; 4032 ccw = cqr->cpaddr; 4033 /* First ccw is define extent or prefix. */ 4034 if (use_prefix) { 4035 if (prefix(ccw++, cqr->data, first_trk, 4036 last_trk, cmd, basedev, startdev) == -EAGAIN) { 4037 /* Clock not in sync and XRC is enabled. 4038 * Try again later. 4039 */ 4040 dasd_sfree_request(cqr, startdev); 4041 return ERR_PTR(-EAGAIN); 4042 } 4043 idaws = (dma64_t *)(cqr->data + sizeof(struct PFX_eckd_data)); 4044 } else { 4045 if (define_extent(ccw++, cqr->data, first_trk, 4046 last_trk, cmd, basedev, 0) == -EAGAIN) { 4047 /* Clock not in sync and XRC is enabled. 4048 * Try again later. 4049 */ 4050 dasd_sfree_request(cqr, startdev); 4051 return ERR_PTR(-EAGAIN); 4052 } 4053 idaws = (dma64_t *)(cqr->data + sizeof(struct DE_eckd_data)); 4054 } 4055 /* Build locate_record+read/write/ccws. */ 4056 LO_data = (struct LO_eckd_data *) (idaws + cidaw); 4057 recid = first_rec; 4058 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 4059 /* Only standard blocks so there is just one locate record. */ 4060 ccw[-1].flags |= CCW_FLAG_CC; 4061 locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 4062 last_rec - recid + 1, cmd, basedev, blksize); 4063 } 4064 rq_for_each_segment(bv, req, iter) { 4065 dst = bvec_virt(&bv); 4066 if (dasd_page_cache) { 4067 char *copy = kmem_cache_alloc(dasd_page_cache, 4068 GFP_DMA | __GFP_NOWARN); 4069 if (copy && rq_data_dir(req) == WRITE) 4070 memcpy(copy + bv.bv_offset, dst, bv.bv_len); 4071 if (copy) 4072 dst = copy + bv.bv_offset; 4073 } 4074 for (off = 0; off < bv.bv_len; off += blksize) { 4075 sector_t trkid = recid; 4076 unsigned int recoffs = sector_div(trkid, blk_per_trk); 4077 rcmd = cmd; 4078 count = blksize; 4079 /* Locate record for cdl special block ? */ 4080 if (private->uses_cdl && recid < 2*blk_per_trk) { 4081 if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 4082 rcmd |= 0x8; 4083 count = dasd_eckd_cdl_reclen(recid); 4084 if (count < blksize && 4085 rq_data_dir(req) == READ) 4086 memset(dst + count, 0xe5, 4087 blksize - count); 4088 } 4089 ccw[-1].flags |= CCW_FLAG_CC; 4090 locate_record(ccw++, LO_data++, 4091 trkid, recoffs + 1, 4092 1, rcmd, basedev, count); 4093 } 4094 /* Locate record for standard blocks ? */ 4095 if (private->uses_cdl && recid == 2*blk_per_trk) { 4096 ccw[-1].flags |= CCW_FLAG_CC; 4097 locate_record(ccw++, LO_data++, 4098 trkid, recoffs + 1, 4099 last_rec - recid + 1, 4100 cmd, basedev, count); 4101 } 4102 /* Read/write ccw. */ 4103 ccw[-1].flags |= CCW_FLAG_CC; 4104 ccw->cmd_code = rcmd; 4105 ccw->count = count; 4106 if (idal_is_needed(dst, blksize)) { 4107 ccw->cda = virt_to_dma32(idaws); 4108 ccw->flags = CCW_FLAG_IDA; 4109 idaws = idal_create_words(idaws, dst, blksize); 4110 } else { 4111 ccw->cda = virt_to_dma32(dst); 4112 ccw->flags = 0; 4113 } 4114 ccw++; 4115 dst += blksize; 4116 recid++; 4117 } 4118 } 4119 if (blk_noretry_request(req) || 4120 block->base->features & DASD_FEATURE_FAILFAST) 4121 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4122 cqr->startdev = startdev; 4123 cqr->memdev = startdev; 4124 cqr->block = block; 4125 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4126 cqr->lpm = dasd_path_get_ppm(startdev); 4127 cqr->retries = startdev->default_retries; 4128 cqr->buildclk = get_tod_clock(); 4129 cqr->status = DASD_CQR_FILLED; 4130 4131 /* Set flags to suppress output for expected errors */ 4132 if (dasd_eckd_is_ese(basedev)) { 4133 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 4134 } 4135 4136 return cqr; 4137 } 4138 dasd_eckd_build_cp_cmd_track(struct dasd_device * startdev,struct dasd_block * block,struct request * req,sector_t first_rec,sector_t last_rec,sector_t first_trk,sector_t last_trk,unsigned int first_offs,unsigned int last_offs,unsigned int blk_per_trk,unsigned int blksize)4139 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 4140 struct dasd_device *startdev, 4141 struct dasd_block *block, 4142 struct request *req, 4143 sector_t first_rec, 4144 sector_t last_rec, 4145 sector_t first_trk, 4146 sector_t last_trk, 4147 unsigned int first_offs, 4148 unsigned int last_offs, 4149 unsigned int blk_per_trk, 4150 unsigned int blksize) 4151 { 4152 dma64_t *idaws; 4153 struct dasd_ccw_req *cqr; 4154 struct ccw1 *ccw; 4155 struct req_iterator iter; 4156 struct bio_vec bv; 4157 char *dst, *idaw_dst; 4158 unsigned int cidaw, cplength, datasize; 4159 unsigned int tlf; 4160 sector_t recid; 4161 unsigned char cmd; 4162 struct dasd_device *basedev; 4163 unsigned int trkcount, count, count_to_trk_end; 4164 unsigned int idaw_len, seg_len, part_len, len_to_track_end; 4165 unsigned char new_track, end_idaw; 4166 sector_t trkid; 4167 unsigned int recoffs; 4168 4169 basedev = block->base; 4170 if (rq_data_dir(req) == READ) 4171 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4172 else if (rq_data_dir(req) == WRITE) 4173 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4174 else 4175 return ERR_PTR(-EINVAL); 4176 4177 /* Track based I/O needs IDAWs for each page, and not just for 4178 * 64 bit addresses. We need additional idals for pages 4179 * that get filled from two tracks, so we use the number 4180 * of records as upper limit. 4181 */ 4182 cidaw = last_rec - first_rec + 1; 4183 trkcount = last_trk - first_trk + 1; 4184 4185 /* 1x prefix + one read/write ccw per track */ 4186 cplength = 1 + trkcount; 4187 4188 datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); 4189 4190 /* Allocate the ccw request. */ 4191 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 4192 startdev, blk_mq_rq_to_pdu(req)); 4193 if (IS_ERR(cqr)) 4194 return cqr; 4195 ccw = cqr->cpaddr; 4196 /* transfer length factor: how many bytes to read from the last track */ 4197 if (first_trk == last_trk) 4198 tlf = last_offs - first_offs + 1; 4199 else 4200 tlf = last_offs + 1; 4201 tlf *= blksize; 4202 4203 if (prefix_LRE(ccw++, cqr->data, first_trk, 4204 last_trk, cmd, basedev, startdev, 4205 1 /* format */, first_offs + 1, 4206 trkcount, blksize, 4207 tlf) == -EAGAIN) { 4208 /* Clock not in sync and XRC is enabled. 4209 * Try again later. 4210 */ 4211 dasd_sfree_request(cqr, startdev); 4212 return ERR_PTR(-EAGAIN); 4213 } 4214 4215 /* 4216 * The translation of request into ccw programs must meet the 4217 * following conditions: 4218 * - all idaws but the first and the last must address full pages 4219 * (or 2K blocks on 31-bit) 4220 * - the scope of a ccw and it's idal ends with the track boundaries 4221 */ 4222 idaws = (dma64_t *)(cqr->data + sizeof(struct PFX_eckd_data)); 4223 recid = first_rec; 4224 new_track = 1; 4225 end_idaw = 0; 4226 len_to_track_end = 0; 4227 idaw_dst = NULL; 4228 idaw_len = 0; 4229 rq_for_each_segment(bv, req, iter) { 4230 dst = bvec_virt(&bv); 4231 seg_len = bv.bv_len; 4232 while (seg_len) { 4233 if (new_track) { 4234 trkid = recid; 4235 recoffs = sector_div(trkid, blk_per_trk); 4236 count_to_trk_end = blk_per_trk - recoffs; 4237 count = min((last_rec - recid + 1), 4238 (sector_t)count_to_trk_end); 4239 len_to_track_end = count * blksize; 4240 ccw[-1].flags |= CCW_FLAG_CC; 4241 ccw->cmd_code = cmd; 4242 ccw->count = len_to_track_end; 4243 ccw->cda = virt_to_dma32(idaws); 4244 ccw->flags = CCW_FLAG_IDA; 4245 ccw++; 4246 recid += count; 4247 new_track = 0; 4248 /* first idaw for a ccw may start anywhere */ 4249 if (!idaw_dst) 4250 idaw_dst = dst; 4251 } 4252 /* If we start a new idaw, we must make sure that it 4253 * starts on an IDA_BLOCK_SIZE boundary. 4254 * If we continue an idaw, we must make sure that the 4255 * current segment begins where the so far accumulated 4256 * idaw ends 4257 */ 4258 if (!idaw_dst) { 4259 if ((unsigned long)(dst) & (IDA_BLOCK_SIZE - 1)) { 4260 dasd_sfree_request(cqr, startdev); 4261 return ERR_PTR(-ERANGE); 4262 } else 4263 idaw_dst = dst; 4264 } 4265 if ((idaw_dst + idaw_len) != dst) { 4266 dasd_sfree_request(cqr, startdev); 4267 return ERR_PTR(-ERANGE); 4268 } 4269 part_len = min(seg_len, len_to_track_end); 4270 seg_len -= part_len; 4271 dst += part_len; 4272 idaw_len += part_len; 4273 len_to_track_end -= part_len; 4274 /* collected memory area ends on an IDA_BLOCK border, 4275 * -> create an idaw 4276 * idal_create_words will handle cases where idaw_len 4277 * is larger then IDA_BLOCK_SIZE 4278 */ 4279 if (!((unsigned long)(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE - 1))) 4280 end_idaw = 1; 4281 /* We also need to end the idaw at track end */ 4282 if (!len_to_track_end) { 4283 new_track = 1; 4284 end_idaw = 1; 4285 } 4286 if (end_idaw) { 4287 idaws = idal_create_words(idaws, idaw_dst, 4288 idaw_len); 4289 idaw_dst = NULL; 4290 idaw_len = 0; 4291 end_idaw = 0; 4292 } 4293 } 4294 } 4295 4296 if (blk_noretry_request(req) || 4297 block->base->features & DASD_FEATURE_FAILFAST) 4298 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4299 cqr->startdev = startdev; 4300 cqr->memdev = startdev; 4301 cqr->block = block; 4302 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4303 cqr->lpm = dasd_path_get_ppm(startdev); 4304 cqr->retries = startdev->default_retries; 4305 cqr->buildclk = get_tod_clock(); 4306 cqr->status = DASD_CQR_FILLED; 4307 4308 /* Set flags to suppress output for expected errors */ 4309 if (dasd_eckd_is_ese(basedev)) 4310 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 4311 4312 return cqr; 4313 } 4314 prepare_itcw(struct itcw * itcw,unsigned int trk,unsigned int totrk,int cmd,struct dasd_device * basedev,struct dasd_device * startdev,unsigned int rec_on_trk,int count,unsigned int blksize,unsigned int total_data_size,unsigned int tlf,unsigned int blk_per_trk)4315 static int prepare_itcw(struct itcw *itcw, 4316 unsigned int trk, unsigned int totrk, int cmd, 4317 struct dasd_device *basedev, 4318 struct dasd_device *startdev, 4319 unsigned int rec_on_trk, int count, 4320 unsigned int blksize, 4321 unsigned int total_data_size, 4322 unsigned int tlf, 4323 unsigned int blk_per_trk) 4324 { 4325 struct PFX_eckd_data pfxdata; 4326 struct dasd_eckd_private *basepriv, *startpriv; 4327 struct DE_eckd_data *dedata; 4328 struct LRE_eckd_data *lredata; 4329 struct dcw *dcw; 4330 4331 u32 begcyl, endcyl; 4332 u16 heads, beghead, endhead; 4333 u8 pfx_cmd; 4334 4335 int rc = 0; 4336 int sector = 0; 4337 int dn, d; 4338 4339 4340 /* setup prefix data */ 4341 basepriv = basedev->private; 4342 startpriv = startdev->private; 4343 dedata = &pfxdata.define_extent; 4344 lredata = &pfxdata.locate_record; 4345 4346 memset(&pfxdata, 0, sizeof(pfxdata)); 4347 pfxdata.format = 1; /* PFX with LRE */ 4348 pfxdata.base_address = basepriv->conf.ned->unit_addr; 4349 pfxdata.base_lss = basepriv->conf.ned->ID; 4350 pfxdata.validity.define_extent = 1; 4351 4352 /* private uid is kept up to date, conf_data may be outdated */ 4353 if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 4354 pfxdata.validity.verify_base = 1; 4355 4356 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 4357 pfxdata.validity.verify_base = 1; 4358 pfxdata.validity.hyper_pav = 1; 4359 } 4360 4361 switch (cmd) { 4362 case DASD_ECKD_CCW_READ_TRACK_DATA: 4363 dedata->mask.perm = 0x1; 4364 dedata->attributes.operation = basepriv->attrib.operation; 4365 dedata->blk_size = blksize; 4366 dedata->ga_extended |= 0x42; 4367 lredata->operation.orientation = 0x0; 4368 lredata->operation.operation = 0x0C; 4369 lredata->auxiliary.check_bytes = 0x01; 4370 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 4371 break; 4372 case DASD_ECKD_CCW_WRITE_TRACK_DATA: 4373 dedata->mask.perm = 0x02; 4374 dedata->attributes.operation = basepriv->attrib.operation; 4375 dedata->blk_size = blksize; 4376 rc = set_timestamp(NULL, dedata, basedev); 4377 dedata->ga_extended |= 0x42; 4378 lredata->operation.orientation = 0x0; 4379 lredata->operation.operation = 0x3F; 4380 lredata->extended_operation = 0x23; 4381 lredata->auxiliary.check_bytes = 0x2; 4382 /* 4383 * If XRC is supported the System Time Stamp is set. The 4384 * validity of the time stamp must be reflected in the prefix 4385 * data as well. 4386 */ 4387 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 4388 pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ 4389 pfx_cmd = DASD_ECKD_CCW_PFX; 4390 break; 4391 case DASD_ECKD_CCW_READ_COUNT_MT: 4392 dedata->mask.perm = 0x1; 4393 dedata->attributes.operation = DASD_BYPASS_CACHE; 4394 dedata->ga_extended |= 0x42; 4395 dedata->blk_size = blksize; 4396 lredata->operation.orientation = 0x2; 4397 lredata->operation.operation = 0x16; 4398 lredata->auxiliary.check_bytes = 0x01; 4399 pfx_cmd = DASD_ECKD_CCW_PFX_READ; 4400 break; 4401 default: 4402 DBF_DEV_EVENT(DBF_ERR, basedev, 4403 "prepare itcw, unknown opcode 0x%x", cmd); 4404 BUG(); 4405 break; 4406 } 4407 if (rc) 4408 return rc; 4409 4410 dedata->attributes.mode = 0x3; /* ECKD */ 4411 4412 heads = basepriv->rdc_data.trk_per_cyl; 4413 begcyl = trk / heads; 4414 beghead = trk % heads; 4415 endcyl = totrk / heads; 4416 endhead = totrk % heads; 4417 4418 /* check for sequential prestage - enhance cylinder range */ 4419 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 4420 dedata->attributes.operation == DASD_SEQ_ACCESS) { 4421 4422 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 4423 endcyl += basepriv->attrib.nr_cyl; 4424 else 4425 endcyl = (basepriv->real_cyl - 1); 4426 } 4427 4428 set_ch_t(&dedata->beg_ext, begcyl, beghead); 4429 set_ch_t(&dedata->end_ext, endcyl, endhead); 4430 4431 dedata->ep_format = 0x20; /* records per track is valid */ 4432 dedata->ep_rec_per_track = blk_per_trk; 4433 4434 if (rec_on_trk) { 4435 switch (basepriv->rdc_data.dev_type) { 4436 case 0x3390: 4437 dn = ceil_quot(blksize + 6, 232); 4438 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 4439 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 4440 break; 4441 case 0x3380: 4442 d = 7 + ceil_quot(blksize + 12, 32); 4443 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 4444 break; 4445 } 4446 } 4447 4448 if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 4449 lredata->auxiliary.length_valid = 0; 4450 lredata->auxiliary.length_scope = 0; 4451 lredata->sector = 0xff; 4452 } else { 4453 lredata->auxiliary.length_valid = 1; 4454 lredata->auxiliary.length_scope = 1; 4455 lredata->sector = sector; 4456 } 4457 lredata->auxiliary.imbedded_ccw_valid = 1; 4458 lredata->length = tlf; 4459 lredata->imbedded_ccw = cmd; 4460 lredata->count = count; 4461 set_ch_t(&lredata->seek_addr, begcyl, beghead); 4462 lredata->search_arg.cyl = lredata->seek_addr.cyl; 4463 lredata->search_arg.head = lredata->seek_addr.head; 4464 lredata->search_arg.record = rec_on_trk; 4465 4466 dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 4467 &pfxdata, sizeof(pfxdata), total_data_size); 4468 return PTR_ERR_OR_ZERO(dcw); 4469 } 4470 dasd_eckd_build_cp_tpm_track(struct dasd_device * startdev,struct dasd_block * block,struct request * req,sector_t first_rec,sector_t last_rec,sector_t first_trk,sector_t last_trk,unsigned int first_offs,unsigned int last_offs,unsigned int blk_per_trk,unsigned int blksize)4471 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 4472 struct dasd_device *startdev, 4473 struct dasd_block *block, 4474 struct request *req, 4475 sector_t first_rec, 4476 sector_t last_rec, 4477 sector_t first_trk, 4478 sector_t last_trk, 4479 unsigned int first_offs, 4480 unsigned int last_offs, 4481 unsigned int blk_per_trk, 4482 unsigned int blksize) 4483 { 4484 struct dasd_ccw_req *cqr; 4485 struct req_iterator iter; 4486 struct bio_vec bv; 4487 char *dst; 4488 unsigned int trkcount, ctidaw; 4489 unsigned char cmd; 4490 struct dasd_device *basedev; 4491 unsigned int tlf; 4492 struct itcw *itcw; 4493 struct tidaw *last_tidaw = NULL; 4494 int itcw_op; 4495 size_t itcw_size; 4496 u8 tidaw_flags; 4497 unsigned int seg_len, part_len, len_to_track_end; 4498 unsigned char new_track; 4499 sector_t recid, trkid; 4500 unsigned int offs; 4501 unsigned int count, count_to_trk_end; 4502 int ret; 4503 4504 basedev = block->base; 4505 if (rq_data_dir(req) == READ) { 4506 cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4507 itcw_op = ITCW_OP_READ; 4508 } else if (rq_data_dir(req) == WRITE) { 4509 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4510 itcw_op = ITCW_OP_WRITE; 4511 } else 4512 return ERR_PTR(-EINVAL); 4513 4514 /* trackbased I/O needs address all memory via TIDAWs, 4515 * not just for 64 bit addresses. This allows us to map 4516 * each segment directly to one tidaw. 4517 * In the case of write requests, additional tidaws may 4518 * be needed when a segment crosses a track boundary. 4519 */ 4520 trkcount = last_trk - first_trk + 1; 4521 ctidaw = 0; 4522 rq_for_each_segment(bv, req, iter) { 4523 ++ctidaw; 4524 } 4525 if (rq_data_dir(req) == WRITE) 4526 ctidaw += (last_trk - first_trk); 4527 4528 /* Allocate the ccw request. */ 4529 itcw_size = itcw_calc_size(0, ctidaw, 0); 4530 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, 4531 blk_mq_rq_to_pdu(req)); 4532 if (IS_ERR(cqr)) 4533 return cqr; 4534 4535 /* transfer length factor: how many bytes to read from the last track */ 4536 if (first_trk == last_trk) 4537 tlf = last_offs - first_offs + 1; 4538 else 4539 tlf = last_offs + 1; 4540 tlf *= blksize; 4541 4542 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 4543 if (IS_ERR(itcw)) { 4544 ret = -EINVAL; 4545 goto out_error; 4546 } 4547 cqr->cpaddr = itcw_get_tcw(itcw); 4548 if (prepare_itcw(itcw, first_trk, last_trk, 4549 cmd, basedev, startdev, 4550 first_offs + 1, 4551 trkcount, blksize, 4552 (last_rec - first_rec + 1) * blksize, 4553 tlf, blk_per_trk) == -EAGAIN) { 4554 /* Clock not in sync and XRC is enabled. 4555 * Try again later. 4556 */ 4557 ret = -EAGAIN; 4558 goto out_error; 4559 } 4560 len_to_track_end = 0; 4561 /* 4562 * A tidaw can address 4k of memory, but must not cross page boundaries 4563 * We can let the block layer handle this by setting seg_boundary_mask 4564 * to page boundaries and max_segment_size to page size when setting up 4565 * the request queue. 4566 * For write requests, a TIDAW must not cross track boundaries, because 4567 * we have to set the CBC flag on the last tidaw for each track. 4568 */ 4569 if (rq_data_dir(req) == WRITE) { 4570 new_track = 1; 4571 recid = first_rec; 4572 rq_for_each_segment(bv, req, iter) { 4573 dst = bvec_virt(&bv); 4574 seg_len = bv.bv_len; 4575 while (seg_len) { 4576 if (new_track) { 4577 trkid = recid; 4578 offs = sector_div(trkid, blk_per_trk); 4579 count_to_trk_end = blk_per_trk - offs; 4580 count = min((last_rec - recid + 1), 4581 (sector_t)count_to_trk_end); 4582 len_to_track_end = count * blksize; 4583 recid += count; 4584 new_track = 0; 4585 } 4586 part_len = min(seg_len, len_to_track_end); 4587 seg_len -= part_len; 4588 len_to_track_end -= part_len; 4589 /* We need to end the tidaw at track end */ 4590 if (!len_to_track_end) { 4591 new_track = 1; 4592 tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 4593 } else 4594 tidaw_flags = 0; 4595 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 4596 dst, part_len); 4597 if (IS_ERR(last_tidaw)) { 4598 ret = -EINVAL; 4599 goto out_error; 4600 } 4601 dst += part_len; 4602 } 4603 } 4604 } else { 4605 rq_for_each_segment(bv, req, iter) { 4606 dst = bvec_virt(&bv); 4607 last_tidaw = itcw_add_tidaw(itcw, 0x00, 4608 dst, bv.bv_len); 4609 if (IS_ERR(last_tidaw)) { 4610 ret = -EINVAL; 4611 goto out_error; 4612 } 4613 } 4614 } 4615 last_tidaw->flags |= TIDAW_FLAGS_LAST; 4616 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 4617 itcw_finalize(itcw); 4618 4619 if (blk_noretry_request(req) || 4620 block->base->features & DASD_FEATURE_FAILFAST) 4621 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4622 cqr->cpmode = 1; 4623 cqr->startdev = startdev; 4624 cqr->memdev = startdev; 4625 cqr->block = block; 4626 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4627 cqr->lpm = dasd_path_get_ppm(startdev); 4628 cqr->retries = startdev->default_retries; 4629 cqr->buildclk = get_tod_clock(); 4630 cqr->status = DASD_CQR_FILLED; 4631 4632 /* Set flags to suppress output for expected errors */ 4633 if (dasd_eckd_is_ese(basedev)) { 4634 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 4635 set_bit(DASD_CQR_SUPPRESS_IT, &cqr->flags); 4636 } 4637 4638 return cqr; 4639 out_error: 4640 dasd_sfree_request(cqr, startdev); 4641 return ERR_PTR(ret); 4642 } 4643 dasd_eckd_build_cp(struct dasd_device * startdev,struct dasd_block * block,struct request * req)4644 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 4645 struct dasd_block *block, 4646 struct request *req) 4647 { 4648 int cmdrtd, cmdwtd; 4649 int use_prefix; 4650 int fcx_multitrack; 4651 struct dasd_eckd_private *private; 4652 struct dasd_device *basedev; 4653 sector_t first_rec, last_rec; 4654 sector_t first_trk, last_trk; 4655 unsigned int first_offs, last_offs; 4656 unsigned int blk_per_trk, blksize; 4657 int cdlspecial; 4658 unsigned int data_size; 4659 struct dasd_ccw_req *cqr; 4660 4661 basedev = block->base; 4662 private = basedev->private; 4663 4664 /* Calculate number of blocks/records per track. */ 4665 blksize = block->bp_block; 4666 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 4667 if (blk_per_trk == 0) 4668 return ERR_PTR(-EINVAL); 4669 /* Calculate record id of first and last block. */ 4670 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 4671 first_offs = sector_div(first_trk, blk_per_trk); 4672 last_rec = last_trk = 4673 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 4674 last_offs = sector_div(last_trk, blk_per_trk); 4675 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 4676 4677 fcx_multitrack = private->features.feature[40] & 0x20; 4678 data_size = blk_rq_bytes(req); 4679 if (data_size % blksize) 4680 return ERR_PTR(-EINVAL); 4681 /* tpm write request add CBC data on each track boundary */ 4682 if (rq_data_dir(req) == WRITE) 4683 data_size += (last_trk - first_trk) * 4; 4684 4685 /* is read track data and write track data in command mode supported? */ 4686 cmdrtd = private->features.feature[9] & 0x20; 4687 cmdwtd = private->features.feature[12] & 0x40; 4688 use_prefix = private->features.feature[8] & 0x01; 4689 4690 cqr = NULL; 4691 if (cdlspecial || dasd_page_cache) { 4692 /* do nothing, just fall through to the cmd mode single case */ 4693 } else if ((data_size <= private->fcx_max_data) 4694 && (fcx_multitrack || (first_trk == last_trk))) { 4695 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 4696 first_rec, last_rec, 4697 first_trk, last_trk, 4698 first_offs, last_offs, 4699 blk_per_trk, blksize); 4700 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4701 (PTR_ERR(cqr) != -ENOMEM)) 4702 cqr = NULL; 4703 } else if (use_prefix && 4704 (((rq_data_dir(req) == READ) && cmdrtd) || 4705 ((rq_data_dir(req) == WRITE) && cmdwtd))) { 4706 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 4707 first_rec, last_rec, 4708 first_trk, last_trk, 4709 first_offs, last_offs, 4710 blk_per_trk, blksize); 4711 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4712 (PTR_ERR(cqr) != -ENOMEM)) 4713 cqr = NULL; 4714 } 4715 if (!cqr) 4716 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 4717 first_rec, last_rec, 4718 first_trk, last_trk, 4719 first_offs, last_offs, 4720 blk_per_trk, blksize); 4721 return cqr; 4722 } 4723 dasd_eckd_build_cp_raw(struct dasd_device * startdev,struct dasd_block * block,struct request * req)4724 static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, 4725 struct dasd_block *block, 4726 struct request *req) 4727 { 4728 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 4729 unsigned int seg_len, len_to_track_end; 4730 unsigned int cidaw, cplength, datasize; 4731 sector_t first_trk, last_trk, sectors; 4732 struct dasd_eckd_private *base_priv; 4733 struct dasd_device *basedev; 4734 struct req_iterator iter; 4735 struct dasd_ccw_req *cqr; 4736 unsigned int trkcount; 4737 unsigned int size; 4738 unsigned char cmd; 4739 struct bio_vec bv; 4740 struct ccw1 *ccw; 4741 dma64_t *idaws; 4742 int use_prefix; 4743 void *data; 4744 char *dst; 4745 4746 /* 4747 * raw track access needs to be mutiple of 64k and on 64k boundary 4748 * For read requests we can fix an incorrect alignment by padding 4749 * the request with dummy pages. 4750 */ 4751 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 4752 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 4753 DASD_RAW_SECTORS_PER_TRACK; 4754 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 4755 DASD_RAW_SECTORS_PER_TRACK; 4756 basedev = block->base; 4757 if ((start_padding_sectors || end_padding_sectors) && 4758 (rq_data_dir(req) == WRITE)) { 4759 DBF_DEV_EVENT(DBF_ERR, basedev, 4760 "raw write not track aligned (%llu,%llu) req %p", 4761 start_padding_sectors, end_padding_sectors, req); 4762 return ERR_PTR(-EINVAL); 4763 } 4764 4765 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 4766 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 4767 DASD_RAW_SECTORS_PER_TRACK; 4768 trkcount = last_trk - first_trk + 1; 4769 4770 if (rq_data_dir(req) == READ) 4771 cmd = DASD_ECKD_CCW_READ_TRACK; 4772 else if (rq_data_dir(req) == WRITE) 4773 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 4774 else 4775 return ERR_PTR(-EINVAL); 4776 4777 /* 4778 * Raw track based I/O needs IDAWs for each page, 4779 * and not just for 64 bit addresses. 4780 */ 4781 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 4782 4783 /* 4784 * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes 4785 * of extended parameter. This is needed for write full track. 4786 */ 4787 base_priv = basedev->private; 4788 use_prefix = base_priv->features.feature[8] & 0x01; 4789 if (use_prefix) { 4790 cplength = 1 + trkcount; 4791 size = sizeof(struct PFX_eckd_data) + 2; 4792 } else { 4793 cplength = 2 + trkcount; 4794 size = sizeof(struct DE_eckd_data) + 4795 sizeof(struct LRE_eckd_data) + 2; 4796 } 4797 size = ALIGN(size, 8); 4798 4799 datasize = size + cidaw * sizeof(unsigned long); 4800 4801 /* Allocate the ccw request. */ 4802 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 4803 datasize, startdev, blk_mq_rq_to_pdu(req)); 4804 if (IS_ERR(cqr)) 4805 return cqr; 4806 4807 ccw = cqr->cpaddr; 4808 data = cqr->data; 4809 4810 if (use_prefix) { 4811 prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, 4812 startdev, 1, 0, trkcount, 0, 0); 4813 } else { 4814 define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); 4815 ccw[-1].flags |= CCW_FLAG_CC; 4816 4817 data += sizeof(struct DE_eckd_data); 4818 locate_record_ext(ccw++, data, first_trk, 0, 4819 trkcount, cmd, basedev, 0, 0); 4820 } 4821 4822 idaws = (dma64_t *)(cqr->data + size); 4823 len_to_track_end = 0; 4824 if (start_padding_sectors) { 4825 ccw[-1].flags |= CCW_FLAG_CC; 4826 ccw->cmd_code = cmd; 4827 /* maximum 3390 track size */ 4828 ccw->count = 57326; 4829 /* 64k map to one track */ 4830 len_to_track_end = 65536 - start_padding_sectors * 512; 4831 ccw->cda = virt_to_dma32(idaws); 4832 ccw->flags |= CCW_FLAG_IDA; 4833 ccw->flags |= CCW_FLAG_SLI; 4834 ccw++; 4835 for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 4836 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4837 } 4838 rq_for_each_segment(bv, req, iter) { 4839 dst = bvec_virt(&bv); 4840 seg_len = bv.bv_len; 4841 if (cmd == DASD_ECKD_CCW_READ_TRACK) 4842 memset(dst, 0, seg_len); 4843 if (!len_to_track_end) { 4844 ccw[-1].flags |= CCW_FLAG_CC; 4845 ccw->cmd_code = cmd; 4846 /* maximum 3390 track size */ 4847 ccw->count = 57326; 4848 /* 64k map to one track */ 4849 len_to_track_end = 65536; 4850 ccw->cda = virt_to_dma32(idaws); 4851 ccw->flags |= CCW_FLAG_IDA; 4852 ccw->flags |= CCW_FLAG_SLI; 4853 ccw++; 4854 } 4855 len_to_track_end -= seg_len; 4856 idaws = idal_create_words(idaws, dst, seg_len); 4857 } 4858 for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 4859 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4860 if (blk_noretry_request(req) || 4861 block->base->features & DASD_FEATURE_FAILFAST) 4862 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4863 cqr->startdev = startdev; 4864 cqr->memdev = startdev; 4865 cqr->block = block; 4866 cqr->expires = startdev->default_expires * HZ; 4867 cqr->lpm = dasd_path_get_ppm(startdev); 4868 cqr->retries = startdev->default_retries; 4869 cqr->buildclk = get_tod_clock(); 4870 cqr->status = DASD_CQR_FILLED; 4871 4872 return cqr; 4873 } 4874 4875 4876 static int dasd_eckd_free_cp(struct dasd_ccw_req * cqr,struct request * req)4877 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 4878 { 4879 struct dasd_eckd_private *private; 4880 struct ccw1 *ccw; 4881 struct req_iterator iter; 4882 struct bio_vec bv; 4883 char *dst, *cda; 4884 unsigned int blksize, blk_per_trk, off; 4885 sector_t recid; 4886 int status; 4887 4888 if (!dasd_page_cache) 4889 goto out; 4890 private = cqr->block->base->private; 4891 blksize = cqr->block->bp_block; 4892 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 4893 recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 4894 ccw = cqr->cpaddr; 4895 /* Skip over define extent & locate record. */ 4896 ccw++; 4897 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 4898 ccw++; 4899 rq_for_each_segment(bv, req, iter) { 4900 dst = bvec_virt(&bv); 4901 for (off = 0; off < bv.bv_len; off += blksize) { 4902 /* Skip locate record. */ 4903 if (private->uses_cdl && recid <= 2*blk_per_trk) 4904 ccw++; 4905 if (dst) { 4906 if (ccw->flags & CCW_FLAG_IDA) 4907 cda = dma64_to_virt(*((dma64_t *)dma32_to_virt(ccw->cda))); 4908 else 4909 cda = dma32_to_virt(ccw->cda); 4910 if (dst != cda) { 4911 if (rq_data_dir(req) == READ) 4912 memcpy(dst, cda, bv.bv_len); 4913 kmem_cache_free(dasd_page_cache, 4914 (void *)((addr_t)cda & PAGE_MASK)); 4915 } 4916 dst = NULL; 4917 } 4918 ccw++; 4919 recid++; 4920 } 4921 } 4922 out: 4923 status = cqr->status == DASD_CQR_DONE; 4924 dasd_sfree_request(cqr, cqr->memdev); 4925 return status; 4926 } 4927 4928 /* 4929 * Modify ccw/tcw in cqr so it can be started on a base device. 4930 * 4931 * Note that this is not enough to restart the cqr! 4932 * Either reset cqr->startdev as well (summary unit check handling) 4933 * or restart via separate cqr (as in ERP handling). 4934 */ dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req * cqr)4935 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 4936 { 4937 struct ccw1 *ccw; 4938 struct PFX_eckd_data *pfxdata; 4939 struct tcw *tcw; 4940 struct tccb *tccb; 4941 struct dcw *dcw; 4942 4943 if (cqr->cpmode == 1) { 4944 tcw = cqr->cpaddr; 4945 tccb = tcw_get_tccb(tcw); 4946 dcw = (struct dcw *)&tccb->tca[0]; 4947 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4948 pfxdata->validity.verify_base = 0; 4949 pfxdata->validity.hyper_pav = 0; 4950 } else { 4951 ccw = cqr->cpaddr; 4952 pfxdata = cqr->data; 4953 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 4954 pfxdata->validity.verify_base = 0; 4955 pfxdata->validity.hyper_pav = 0; 4956 } 4957 } 4958 } 4959 4960 #define DASD_ECKD_CHANQ_MAX_SIZE 4 4961 dasd_eckd_build_alias_cp(struct dasd_device * base,struct dasd_block * block,struct request * req)4962 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 4963 struct dasd_block *block, 4964 struct request *req) 4965 { 4966 struct dasd_eckd_private *private; 4967 struct dasd_device *startdev; 4968 unsigned long flags; 4969 struct dasd_ccw_req *cqr; 4970 4971 startdev = dasd_alias_get_start_dev(base); 4972 if (!startdev) 4973 startdev = base; 4974 private = startdev->private; 4975 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 4976 return ERR_PTR(-EBUSY); 4977 4978 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 4979 private->count++; 4980 if ((base->features & DASD_FEATURE_USERAW)) 4981 cqr = dasd_eckd_build_cp_raw(startdev, block, req); 4982 else 4983 cqr = dasd_eckd_build_cp(startdev, block, req); 4984 if (IS_ERR(cqr)) 4985 private->count--; 4986 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 4987 return cqr; 4988 } 4989 dasd_eckd_free_alias_cp(struct dasd_ccw_req * cqr,struct request * req)4990 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 4991 struct request *req) 4992 { 4993 struct dasd_eckd_private *private; 4994 unsigned long flags; 4995 4996 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4997 private = cqr->memdev->private; 4998 private->count--; 4999 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 5000 return dasd_eckd_free_cp(cqr, req); 5001 } 5002 5003 static int dasd_eckd_fill_info(struct dasd_device * device,struct dasd_information2_t * info)5004 dasd_eckd_fill_info(struct dasd_device * device, 5005 struct dasd_information2_t * info) 5006 { 5007 struct dasd_eckd_private *private = device->private; 5008 5009 info->label_block = 2; 5010 info->FBA_layout = private->uses_cdl ? 0 : 1; 5011 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 5012 info->characteristics_size = sizeof(private->rdc_data); 5013 memcpy(info->characteristics, &private->rdc_data, 5014 sizeof(private->rdc_data)); 5015 info->confdata_size = min_t(unsigned long, private->conf.len, 5016 sizeof(info->configuration_data)); 5017 memcpy(info->configuration_data, private->conf.data, 5018 info->confdata_size); 5019 return 0; 5020 } 5021 5022 /* 5023 * SECTION: ioctl functions for eckd devices. 5024 */ 5025 5026 /* 5027 * Release device ioctl. 5028 * Buils a channel programm to releases a prior reserved 5029 * (see dasd_eckd_reserve) device. 5030 */ 5031 static int dasd_eckd_release(struct dasd_device * device)5032 dasd_eckd_release(struct dasd_device *device) 5033 { 5034 struct dasd_ccw_req *cqr; 5035 int rc; 5036 struct ccw1 *ccw; 5037 int useglobal; 5038 5039 if (!capable(CAP_SYS_ADMIN)) 5040 return -EACCES; 5041 5042 useglobal = 0; 5043 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 5044 if (IS_ERR(cqr)) { 5045 mutex_lock(&dasd_reserve_mutex); 5046 useglobal = 1; 5047 cqr = &dasd_reserve_req->cqr; 5048 memset(cqr, 0, sizeof(*cqr)); 5049 memset(&dasd_reserve_req->ccw, 0, 5050 sizeof(dasd_reserve_req->ccw)); 5051 cqr->cpaddr = &dasd_reserve_req->ccw; 5052 cqr->data = &dasd_reserve_req->data; 5053 cqr->magic = DASD_ECKD_MAGIC; 5054 } 5055 ccw = cqr->cpaddr; 5056 ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 5057 ccw->flags |= CCW_FLAG_SLI; 5058 ccw->count = 32; 5059 ccw->cda = virt_to_dma32(cqr->data); 5060 cqr->startdev = device; 5061 cqr->memdev = device; 5062 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5063 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5064 cqr->retries = 2; /* set retry counter to enable basic ERP */ 5065 cqr->expires = 2 * HZ; 5066 cqr->buildclk = get_tod_clock(); 5067 cqr->status = DASD_CQR_FILLED; 5068 5069 rc = dasd_sleep_on_immediatly(cqr); 5070 if (!rc) 5071 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 5072 5073 if (useglobal) 5074 mutex_unlock(&dasd_reserve_mutex); 5075 else 5076 dasd_sfree_request(cqr, cqr->memdev); 5077 return rc; 5078 } 5079 5080 /* 5081 * Reserve device ioctl. 5082 * Options are set to 'synchronous wait for interrupt' and 5083 * 'timeout the request'. This leads to a terminate IO if 5084 * the interrupt is outstanding for a certain time. 5085 */ 5086 static int dasd_eckd_reserve(struct dasd_device * device)5087 dasd_eckd_reserve(struct dasd_device *device) 5088 { 5089 struct dasd_ccw_req *cqr; 5090 int rc; 5091 struct ccw1 *ccw; 5092 int useglobal; 5093 5094 if (!capable(CAP_SYS_ADMIN)) 5095 return -EACCES; 5096 5097 useglobal = 0; 5098 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 5099 if (IS_ERR(cqr)) { 5100 mutex_lock(&dasd_reserve_mutex); 5101 useglobal = 1; 5102 cqr = &dasd_reserve_req->cqr; 5103 memset(cqr, 0, sizeof(*cqr)); 5104 memset(&dasd_reserve_req->ccw, 0, 5105 sizeof(dasd_reserve_req->ccw)); 5106 cqr->cpaddr = &dasd_reserve_req->ccw; 5107 cqr->data = &dasd_reserve_req->data; 5108 cqr->magic = DASD_ECKD_MAGIC; 5109 } 5110 ccw = cqr->cpaddr; 5111 ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 5112 ccw->flags |= CCW_FLAG_SLI; 5113 ccw->count = 32; 5114 ccw->cda = virt_to_dma32(cqr->data); 5115 cqr->startdev = device; 5116 cqr->memdev = device; 5117 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5118 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5119 cqr->retries = 2; /* set retry counter to enable basic ERP */ 5120 cqr->expires = 2 * HZ; 5121 cqr->buildclk = get_tod_clock(); 5122 cqr->status = DASD_CQR_FILLED; 5123 5124 rc = dasd_sleep_on_immediatly(cqr); 5125 if (!rc) 5126 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 5127 5128 if (useglobal) 5129 mutex_unlock(&dasd_reserve_mutex); 5130 else 5131 dasd_sfree_request(cqr, cqr->memdev); 5132 return rc; 5133 } 5134 5135 /* 5136 * Steal lock ioctl - unconditional reserve device. 5137 * Buils a channel programm to break a device's reservation. 5138 * (unconditional reserve) 5139 */ 5140 static int dasd_eckd_steal_lock(struct dasd_device * device)5141 dasd_eckd_steal_lock(struct dasd_device *device) 5142 { 5143 struct dasd_ccw_req *cqr; 5144 int rc; 5145 struct ccw1 *ccw; 5146 int useglobal; 5147 5148 if (!capable(CAP_SYS_ADMIN)) 5149 return -EACCES; 5150 5151 useglobal = 0; 5152 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 5153 if (IS_ERR(cqr)) { 5154 mutex_lock(&dasd_reserve_mutex); 5155 useglobal = 1; 5156 cqr = &dasd_reserve_req->cqr; 5157 memset(cqr, 0, sizeof(*cqr)); 5158 memset(&dasd_reserve_req->ccw, 0, 5159 sizeof(dasd_reserve_req->ccw)); 5160 cqr->cpaddr = &dasd_reserve_req->ccw; 5161 cqr->data = &dasd_reserve_req->data; 5162 cqr->magic = DASD_ECKD_MAGIC; 5163 } 5164 ccw = cqr->cpaddr; 5165 ccw->cmd_code = DASD_ECKD_CCW_SLCK; 5166 ccw->flags |= CCW_FLAG_SLI; 5167 ccw->count = 32; 5168 ccw->cda = virt_to_dma32(cqr->data); 5169 cqr->startdev = device; 5170 cqr->memdev = device; 5171 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5172 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5173 cqr->retries = 2; /* set retry counter to enable basic ERP */ 5174 cqr->expires = 2 * HZ; 5175 cqr->buildclk = get_tod_clock(); 5176 cqr->status = DASD_CQR_FILLED; 5177 5178 rc = dasd_sleep_on_immediatly(cqr); 5179 if (!rc) 5180 set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 5181 5182 if (useglobal) 5183 mutex_unlock(&dasd_reserve_mutex); 5184 else 5185 dasd_sfree_request(cqr, cqr->memdev); 5186 return rc; 5187 } 5188 5189 /* 5190 * SNID - Sense Path Group ID 5191 * This ioctl may be used in situations where I/O is stalled due to 5192 * a reserve, so if the normal dasd_smalloc_request fails, we use the 5193 * preallocated dasd_reserve_req. 5194 */ dasd_eckd_snid(struct dasd_device * device,void __user * argp)5195 static int dasd_eckd_snid(struct dasd_device *device, 5196 void __user *argp) 5197 { 5198 struct dasd_ccw_req *cqr; 5199 int rc; 5200 struct ccw1 *ccw; 5201 int useglobal; 5202 struct dasd_snid_ioctl_data usrparm; 5203 5204 if (!capable(CAP_SYS_ADMIN)) 5205 return -EACCES; 5206 5207 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5208 return -EFAULT; 5209 5210 useglobal = 0; 5211 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 5212 sizeof(struct dasd_snid_data), device, 5213 NULL); 5214 if (IS_ERR(cqr)) { 5215 mutex_lock(&dasd_reserve_mutex); 5216 useglobal = 1; 5217 cqr = &dasd_reserve_req->cqr; 5218 memset(cqr, 0, sizeof(*cqr)); 5219 memset(&dasd_reserve_req->ccw, 0, 5220 sizeof(dasd_reserve_req->ccw)); 5221 cqr->cpaddr = &dasd_reserve_req->ccw; 5222 cqr->data = &dasd_reserve_req->data; 5223 cqr->magic = DASD_ECKD_MAGIC; 5224 } 5225 ccw = cqr->cpaddr; 5226 ccw->cmd_code = DASD_ECKD_CCW_SNID; 5227 ccw->flags |= CCW_FLAG_SLI; 5228 ccw->count = 12; 5229 ccw->cda = virt_to_dma32(cqr->data); 5230 cqr->startdev = device; 5231 cqr->memdev = device; 5232 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5233 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5234 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 5235 cqr->retries = 5; 5236 cqr->expires = 10 * HZ; 5237 cqr->buildclk = get_tod_clock(); 5238 cqr->status = DASD_CQR_FILLED; 5239 cqr->lpm = usrparm.path_mask; 5240 5241 rc = dasd_sleep_on_immediatly(cqr); 5242 /* verify that I/O processing didn't modify the path mask */ 5243 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 5244 rc = -EIO; 5245 if (!rc) { 5246 usrparm.data = *((struct dasd_snid_data *)cqr->data); 5247 if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 5248 rc = -EFAULT; 5249 } 5250 5251 if (useglobal) 5252 mutex_unlock(&dasd_reserve_mutex); 5253 else 5254 dasd_sfree_request(cqr, cqr->memdev); 5255 return rc; 5256 } 5257 5258 /* 5259 * Read performance statistics 5260 */ 5261 static int dasd_eckd_performance(struct dasd_device * device,void __user * argp)5262 dasd_eckd_performance(struct dasd_device *device, void __user *argp) 5263 { 5264 struct dasd_psf_prssd_data *prssdp; 5265 struct dasd_rssd_perf_stats_t *stats; 5266 struct dasd_ccw_req *cqr; 5267 struct ccw1 *ccw; 5268 int rc; 5269 5270 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 5271 (sizeof(struct dasd_psf_prssd_data) + 5272 sizeof(struct dasd_rssd_perf_stats_t)), 5273 device, NULL); 5274 if (IS_ERR(cqr)) { 5275 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5276 "Could not allocate initialization request"); 5277 return PTR_ERR(cqr); 5278 } 5279 cqr->startdev = device; 5280 cqr->memdev = device; 5281 cqr->retries = 0; 5282 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5283 cqr->expires = 10 * HZ; 5284 5285 /* Prepare for Read Subsystem Data */ 5286 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5287 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 5288 prssdp->order = PSF_ORDER_PRSSD; 5289 prssdp->suborder = 0x01; /* Performance Statistics */ 5290 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 5291 5292 ccw = cqr->cpaddr; 5293 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5294 ccw->count = sizeof(struct dasd_psf_prssd_data); 5295 ccw->flags |= CCW_FLAG_CC; 5296 ccw->cda = virt_to_dma32(prssdp); 5297 5298 /* Read Subsystem Data - Performance Statistics */ 5299 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 5300 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 5301 5302 ccw++; 5303 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5304 ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 5305 ccw->cda = virt_to_dma32(stats); 5306 5307 cqr->buildclk = get_tod_clock(); 5308 cqr->status = DASD_CQR_FILLED; 5309 rc = dasd_sleep_on(cqr); 5310 if (rc == 0) { 5311 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5312 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 5313 if (copy_to_user(argp, stats, 5314 sizeof(struct dasd_rssd_perf_stats_t))) 5315 rc = -EFAULT; 5316 } 5317 dasd_sfree_request(cqr, cqr->memdev); 5318 return rc; 5319 } 5320 5321 /* 5322 * Get attributes (cache operations) 5323 * Returnes the cache attributes used in Define Extend (DE). 5324 */ 5325 static int dasd_eckd_get_attrib(struct dasd_device * device,void __user * argp)5326 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 5327 { 5328 struct dasd_eckd_private *private = device->private; 5329 struct attrib_data_t attrib = private->attrib; 5330 int rc; 5331 5332 if (!capable(CAP_SYS_ADMIN)) 5333 return -EACCES; 5334 if (!argp) 5335 return -EINVAL; 5336 5337 rc = 0; 5338 if (copy_to_user(argp, (long *) &attrib, 5339 sizeof(struct attrib_data_t))) 5340 rc = -EFAULT; 5341 5342 return rc; 5343 } 5344 5345 /* 5346 * Set attributes (cache operations) 5347 * Stores the attributes for cache operation to be used in Define Extend (DE). 5348 */ 5349 static int dasd_eckd_set_attrib(struct dasd_device * device,void __user * argp)5350 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 5351 { 5352 struct dasd_eckd_private *private = device->private; 5353 struct attrib_data_t attrib; 5354 5355 if (!capable(CAP_SYS_ADMIN)) 5356 return -EACCES; 5357 if (!argp) 5358 return -EINVAL; 5359 5360 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 5361 return -EFAULT; 5362 private->attrib = attrib; 5363 5364 dev_info(&device->cdev->dev, 5365 "The DASD cache mode was set to %x (%i cylinder prestage)\n", 5366 private->attrib.operation, private->attrib.nr_cyl); 5367 return 0; 5368 } 5369 5370 /* 5371 * Issue syscall I/O to EMC Symmetrix array. 5372 * CCWs are PSF and RSSD 5373 */ dasd_symm_io(struct dasd_device * device,void __user * argp)5374 static int dasd_symm_io(struct dasd_device *device, void __user *argp) 5375 { 5376 struct dasd_symmio_parms usrparm; 5377 char *psf_data, *rssd_result; 5378 struct dasd_ccw_req *cqr; 5379 struct ccw1 *ccw; 5380 char psf0, psf1; 5381 int rc; 5382 5383 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 5384 return -EACCES; 5385 psf0 = psf1 = 0; 5386 5387 /* Copy parms from caller */ 5388 rc = -EFAULT; 5389 if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5390 goto out; 5391 if (is_compat_task()) { 5392 /* Make sure pointers are sane even on 31 bit. */ 5393 rc = -EINVAL; 5394 if ((usrparm.psf_data >> 32) != 0) 5395 goto out; 5396 if ((usrparm.rssd_result >> 32) != 0) 5397 goto out; 5398 usrparm.psf_data &= 0x7fffffffULL; 5399 usrparm.rssd_result &= 0x7fffffffULL; 5400 } 5401 /* at least 2 bytes are accessed and should be allocated */ 5402 if (usrparm.psf_data_len < 2) { 5403 DBF_DEV_EVENT(DBF_WARNING, device, 5404 "Symmetrix ioctl invalid data length %d", 5405 usrparm.psf_data_len); 5406 rc = -EINVAL; 5407 goto out; 5408 } 5409 /* alloc I/O data area */ 5410 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 5411 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 5412 if (!psf_data || !rssd_result) { 5413 rc = -ENOMEM; 5414 goto out_free; 5415 } 5416 5417 /* get syscall header from user space */ 5418 rc = -EFAULT; 5419 if (copy_from_user(psf_data, 5420 (void __user *)(unsigned long) usrparm.psf_data, 5421 usrparm.psf_data_len)) 5422 goto out_free; 5423 psf0 = psf_data[0]; 5424 psf1 = psf_data[1]; 5425 5426 /* setup CCWs for PSF + RSSD */ 5427 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL); 5428 if (IS_ERR(cqr)) { 5429 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5430 "Could not allocate initialization request"); 5431 rc = PTR_ERR(cqr); 5432 goto out_free; 5433 } 5434 5435 cqr->startdev = device; 5436 cqr->memdev = device; 5437 cqr->retries = 3; 5438 cqr->expires = 10 * HZ; 5439 cqr->buildclk = get_tod_clock(); 5440 cqr->status = DASD_CQR_FILLED; 5441 5442 /* Build the ccws */ 5443 ccw = cqr->cpaddr; 5444 5445 /* PSF ccw */ 5446 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5447 ccw->count = usrparm.psf_data_len; 5448 ccw->flags |= CCW_FLAG_CC; 5449 ccw->cda = virt_to_dma32(psf_data); 5450 5451 ccw++; 5452 5453 /* RSSD ccw */ 5454 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5455 ccw->count = usrparm.rssd_result_len; 5456 ccw->flags = CCW_FLAG_SLI ; 5457 ccw->cda = virt_to_dma32(rssd_result); 5458 5459 rc = dasd_sleep_on(cqr); 5460 if (rc) 5461 goto out_sfree; 5462 5463 rc = -EFAULT; 5464 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 5465 rssd_result, usrparm.rssd_result_len)) 5466 goto out_sfree; 5467 rc = 0; 5468 5469 out_sfree: 5470 dasd_sfree_request(cqr, cqr->memdev); 5471 out_free: 5472 kfree(rssd_result); 5473 kfree(psf_data); 5474 out: 5475 DBF_DEV_EVENT(DBF_WARNING, device, 5476 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 5477 (int) psf0, (int) psf1, rc); 5478 return rc; 5479 } 5480 5481 static int dasd_eckd_ioctl(struct dasd_block * block,unsigned int cmd,void __user * argp)5482 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 5483 { 5484 struct dasd_device *device = block->base; 5485 5486 switch (cmd) { 5487 case BIODASDGATTR: 5488 return dasd_eckd_get_attrib(device, argp); 5489 case BIODASDSATTR: 5490 return dasd_eckd_set_attrib(device, argp); 5491 case BIODASDPSRD: 5492 return dasd_eckd_performance(device, argp); 5493 case BIODASDRLSE: 5494 return dasd_eckd_release(device); 5495 case BIODASDRSRV: 5496 return dasd_eckd_reserve(device); 5497 case BIODASDSLCK: 5498 return dasd_eckd_steal_lock(device); 5499 case BIODASDSNID: 5500 return dasd_eckd_snid(device, argp); 5501 case BIODASDSYMMIO: 5502 return dasd_symm_io(device, argp); 5503 default: 5504 return -ENOTTY; 5505 } 5506 } 5507 5508 /* 5509 * Dump the range of CCWs into 'page' buffer 5510 * and return number of printed chars. 5511 */ 5512 static void dasd_eckd_dump_ccw_range(struct dasd_device * device,struct ccw1 * from,struct ccw1 * to,char * page)5513 dasd_eckd_dump_ccw_range(struct dasd_device *device, struct ccw1 *from, 5514 struct ccw1 *to, char *page) 5515 { 5516 int len, count; 5517 char *datap; 5518 5519 len = 0; 5520 while (from <= to) { 5521 len += sprintf(page + len, "CCW %px: %08X %08X DAT:", 5522 from, ((int *) from)[0], ((int *) from)[1]); 5523 5524 /* get pointer to data (consider IDALs) */ 5525 if (from->flags & CCW_FLAG_IDA) 5526 datap = dma64_to_virt(*((dma64_t *)dma32_to_virt(from->cda))); 5527 else 5528 datap = dma32_to_virt(from->cda); 5529 5530 /* dump data (max 128 bytes) */ 5531 for (count = 0; count < from->count && count < 128; count++) { 5532 if (count % 32 == 0) 5533 len += sprintf(page + len, "\n"); 5534 if (count % 8 == 0) 5535 len += sprintf(page + len, " "); 5536 if (count % 4 == 0) 5537 len += sprintf(page + len, " "); 5538 len += sprintf(page + len, "%02x", datap[count]); 5539 } 5540 len += sprintf(page + len, "\n"); 5541 from++; 5542 } 5543 if (len > 0) 5544 dev_err(&device->cdev->dev, "%s", page); 5545 } 5546 5547 static void dasd_eckd_dump_sense_dbf(struct dasd_device * device,struct irb * irb,char * reason)5548 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 5549 char *reason) 5550 { 5551 u64 *sense; 5552 u64 *stat; 5553 5554 sense = (u64 *) dasd_get_sense(irb); 5555 stat = (u64 *) &irb->scsw; 5556 if (sense) { 5557 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 5558 "%016llx %016llx %016llx %016llx", 5559 reason, *stat, *((u32 *) (stat + 1)), 5560 sense[0], sense[1], sense[2], sense[3]); 5561 } else { 5562 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 5563 reason, *stat, *((u32 *) (stat + 1)), 5564 "NO VALID SENSE"); 5565 } 5566 } 5567 5568 /* 5569 * Print sense data and related channel program. 5570 * Parts are printed because printk buffer is only 1024 bytes. 5571 */ dasd_eckd_dump_sense_ccw(struct dasd_device * device,struct dasd_ccw_req * req,struct irb * irb)5572 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 5573 struct dasd_ccw_req *req, struct irb *irb) 5574 { 5575 struct ccw1 *first, *last, *fail, *from, *to; 5576 struct device *dev; 5577 int len, sl, sct; 5578 char *page; 5579 5580 dev = &device->cdev->dev; 5581 5582 page = (char *) get_zeroed_page(GFP_ATOMIC); 5583 if (page == NULL) { 5584 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5585 "No memory to dump sense data\n"); 5586 return; 5587 } 5588 /* dump the sense data */ 5589 len = sprintf(page, "I/O status report:\n"); 5590 len += sprintf(page + len, 5591 "in req: %px CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X CS:%02X RC:%d\n", 5592 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5593 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5594 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5595 req ? req->intrc : 0); 5596 len += sprintf(page + len, "Failing CCW: %px\n", 5597 dma32_to_virt(irb->scsw.cmd.cpa)); 5598 if (irb->esw.esw0.erw.cons) { 5599 for (sl = 0; sl < 4; sl++) { 5600 len += sprintf(page + len, "Sense(hex) %2d-%2d:", 5601 (8 * sl), ((8 * sl) + 7)); 5602 5603 for (sct = 0; sct < 8; sct++) { 5604 len += sprintf(page + len, " %02x", 5605 irb->ecw[8 * sl + sct]); 5606 } 5607 len += sprintf(page + len, "\n"); 5608 } 5609 5610 if (irb->ecw[27] & DASD_SENSE_BIT_0) { 5611 /* 24 Byte Sense Data */ 5612 sprintf(page + len, 5613 "24 Byte: %x MSG %x, %s MSGb to SYSOP\n", 5614 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 5615 irb->ecw[1] & 0x10 ? "" : "no"); 5616 } else { 5617 /* 32 Byte Sense Data */ 5618 sprintf(page + len, 5619 "32 Byte: Format: %x Exception class %x\n", 5620 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 5621 } 5622 } else { 5623 sprintf(page + len, "SORRY - NO VALID SENSE AVAILABLE\n"); 5624 } 5625 dev_err(dev, "%s", page); 5626 5627 if (req) { 5628 /* req == NULL for unsolicited interrupts */ 5629 /* dump the Channel Program (max 140 Bytes per line) */ 5630 /* Count CCW and print first CCWs (maximum 7) */ 5631 first = req->cpaddr; 5632 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 5633 to = min(first + 6, last); 5634 dev_err(dev, "Related CP in req: %px\n", req); 5635 dasd_eckd_dump_ccw_range(device, first, to, page); 5636 5637 /* print failing CCW area (maximum 4) */ 5638 /* scsw->cda is either valid or zero */ 5639 from = ++to; 5640 fail = dma32_to_virt(irb->scsw.cmd.cpa); /* failing CCW */ 5641 if (from < fail - 2) { 5642 from = fail - 2; /* there is a gap - print header */ 5643 dev_err(dev, "......\n"); 5644 } 5645 to = min(fail + 1, last); 5646 dasd_eckd_dump_ccw_range(device, from, to, page + len); 5647 5648 /* print last CCWs (maximum 2) */ 5649 len = 0; 5650 from = max(from, ++to); 5651 if (from < last - 1) { 5652 from = last - 1; /* there is a gap - print header */ 5653 dev_err(dev, "......\n"); 5654 } 5655 dasd_eckd_dump_ccw_range(device, from, last, page + len); 5656 } 5657 free_page((unsigned long) page); 5658 } 5659 5660 5661 /* 5662 * Print sense data from a tcw. 5663 */ dasd_eckd_dump_sense_tcw(struct dasd_device * device,struct dasd_ccw_req * req,struct irb * irb)5664 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 5665 struct dasd_ccw_req *req, struct irb *irb) 5666 { 5667 char *page; 5668 int len, sl, sct, residual; 5669 struct tsb *tsb; 5670 u8 *sense, *rcq; 5671 5672 page = (char *) get_zeroed_page(GFP_ATOMIC); 5673 if (page == NULL) { 5674 DBF_DEV_EVENT(DBF_WARNING, device, " %s", 5675 "No memory to dump sense data"); 5676 return; 5677 } 5678 /* dump the sense data */ 5679 len = sprintf(page, "I/O status report:\n"); 5680 len += sprintf(page + len, 5681 "in req: %px CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5682 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 5683 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5684 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5685 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5686 irb->scsw.tm.fcxs, 5687 (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 5688 req ? req->intrc : 0); 5689 len += sprintf(page + len, "Failing TCW: %px\n", 5690 dma32_to_virt(irb->scsw.tm.tcw)); 5691 5692 tsb = NULL; 5693 sense = NULL; 5694 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 5695 tsb = tcw_get_tsb(dma32_to_virt(irb->scsw.tm.tcw)); 5696 5697 if (tsb) { 5698 len += sprintf(page + len, "tsb->length %d\n", tsb->length); 5699 len += sprintf(page + len, "tsb->flags %x\n", tsb->flags); 5700 len += sprintf(page + len, "tsb->dcw_offset %d\n", tsb->dcw_offset); 5701 len += sprintf(page + len, "tsb->count %d\n", tsb->count); 5702 residual = tsb->count - 28; 5703 len += sprintf(page + len, "residual %d\n", residual); 5704 5705 switch (tsb->flags & 0x07) { 5706 case 1: /* tsa_iostat */ 5707 len += sprintf(page + len, "tsb->tsa.iostat.dev_time %d\n", 5708 tsb->tsa.iostat.dev_time); 5709 len += sprintf(page + len, "tsb->tsa.iostat.def_time %d\n", 5710 tsb->tsa.iostat.def_time); 5711 len += sprintf(page + len, "tsb->tsa.iostat.queue_time %d\n", 5712 tsb->tsa.iostat.queue_time); 5713 len += sprintf(page + len, "tsb->tsa.iostat.dev_busy_time %d\n", 5714 tsb->tsa.iostat.dev_busy_time); 5715 len += sprintf(page + len, "tsb->tsa.iostat.dev_act_time %d\n", 5716 tsb->tsa.iostat.dev_act_time); 5717 sense = tsb->tsa.iostat.sense; 5718 break; 5719 case 2: /* ts_ddpc */ 5720 len += sprintf(page + len, "tsb->tsa.ddpc.rc %d\n", 5721 tsb->tsa.ddpc.rc); 5722 for (sl = 0; sl < 2; sl++) { 5723 len += sprintf(page + len, 5724 "tsb->tsa.ddpc.rcq %2d-%2d: ", 5725 (8 * sl), ((8 * sl) + 7)); 5726 rcq = tsb->tsa.ddpc.rcq; 5727 for (sct = 0; sct < 8; sct++) { 5728 len += sprintf(page + len, "%02x", 5729 rcq[8 * sl + sct]); 5730 } 5731 len += sprintf(page + len, "\n"); 5732 } 5733 sense = tsb->tsa.ddpc.sense; 5734 break; 5735 case 3: /* tsa_intrg */ 5736 len += sprintf(page + len, 5737 "tsb->tsa.intrg.: not supported yet\n"); 5738 break; 5739 } 5740 5741 if (sense) { 5742 for (sl = 0; sl < 4; sl++) { 5743 len += sprintf(page + len, 5744 "Sense(hex) %2d-%2d:", 5745 (8 * sl), ((8 * sl) + 7)); 5746 for (sct = 0; sct < 8; sct++) { 5747 len += sprintf(page + len, " %02x", 5748 sense[8 * sl + sct]); 5749 } 5750 len += sprintf(page + len, "\n"); 5751 } 5752 5753 if (sense[27] & DASD_SENSE_BIT_0) { 5754 /* 24 Byte Sense Data */ 5755 sprintf(page + len, 5756 "24 Byte: %x MSG %x, %s MSGb to SYSOP\n", 5757 sense[7] >> 4, sense[7] & 0x0f, 5758 sense[1] & 0x10 ? "" : "no"); 5759 } else { 5760 /* 32 Byte Sense Data */ 5761 sprintf(page + len, 5762 "32 Byte: Format: %x Exception class %x\n", 5763 sense[6] & 0x0f, sense[22] >> 4); 5764 } 5765 } else { 5766 sprintf(page + len, "SORRY - NO VALID SENSE AVAILABLE\n"); 5767 } 5768 } else { 5769 sprintf(page + len, "SORRY - NO TSB DATA AVAILABLE\n"); 5770 } 5771 dev_err(&device->cdev->dev, "%s", page); 5772 free_page((unsigned long) page); 5773 } 5774 dasd_eckd_dump_sense(struct dasd_device * device,struct dasd_ccw_req * req,struct irb * irb)5775 static void dasd_eckd_dump_sense(struct dasd_device *device, 5776 struct dasd_ccw_req *req, struct irb *irb) 5777 { 5778 u8 *sense = dasd_get_sense(irb); 5779 5780 /* 5781 * In some cases certain errors might be expected and 5782 * log messages shouldn't be written then. 5783 * Check if the according suppress bit is set. 5784 */ 5785 if (sense && (sense[1] & SNS1_INV_TRACK_FORMAT) && 5786 !(sense[2] & SNS2_ENV_DATA_PRESENT) && 5787 test_bit(DASD_CQR_SUPPRESS_IT, &req->flags)) 5788 return; 5789 5790 if (sense && sense[0] & SNS0_CMD_REJECT && 5791 test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) 5792 return; 5793 5794 if (sense && sense[1] & SNS1_NO_REC_FOUND && 5795 test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 5796 return; 5797 5798 if (scsw_cstat(&irb->scsw) == 0x40 && 5799 test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 5800 return; 5801 5802 if (scsw_is_tm(&irb->scsw)) 5803 dasd_eckd_dump_sense_tcw(device, req, irb); 5804 else 5805 dasd_eckd_dump_sense_ccw(device, req, irb); 5806 } 5807 dasd_eckd_reload_device(struct dasd_device * device)5808 static int dasd_eckd_reload_device(struct dasd_device *device) 5809 { 5810 struct dasd_eckd_private *private = device->private; 5811 char print_uid[DASD_UID_STRLEN]; 5812 int rc, old_base; 5813 struct dasd_uid uid; 5814 unsigned long flags; 5815 5816 /* 5817 * remove device from alias handling to prevent new requests 5818 * from being scheduled on the wrong alias device 5819 */ 5820 dasd_alias_remove_device(device); 5821 5822 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5823 old_base = private->uid.base_unit_addr; 5824 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5825 5826 /* Read Configuration Data */ 5827 rc = dasd_eckd_read_conf(device); 5828 if (rc) 5829 goto out_err; 5830 5831 dasd_eckd_read_fc_security(device); 5832 5833 rc = dasd_eckd_generate_uid(device); 5834 if (rc) 5835 goto out_err; 5836 /* 5837 * update unit address configuration and 5838 * add device to alias management 5839 */ 5840 dasd_alias_update_add_device(device); 5841 5842 dasd_eckd_get_uid(device, &uid); 5843 5844 if (old_base != uid.base_unit_addr) { 5845 dasd_eckd_get_uid_string(&private->conf, print_uid); 5846 dev_info(&device->cdev->dev, 5847 "An Alias device was reassigned to a new base device " 5848 "with UID: %s\n", print_uid); 5849 } 5850 return 0; 5851 5852 out_err: 5853 return -1; 5854 } 5855 dasd_eckd_read_message_buffer(struct dasd_device * device,struct dasd_rssd_messages * messages,__u8 lpum)5856 static int dasd_eckd_read_message_buffer(struct dasd_device *device, 5857 struct dasd_rssd_messages *messages, 5858 __u8 lpum) 5859 { 5860 struct dasd_rssd_messages *message_buf; 5861 struct dasd_psf_prssd_data *prssdp; 5862 struct dasd_ccw_req *cqr; 5863 struct ccw1 *ccw; 5864 int rc; 5865 5866 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 5867 (sizeof(struct dasd_psf_prssd_data) + 5868 sizeof(struct dasd_rssd_messages)), 5869 device, NULL); 5870 if (IS_ERR(cqr)) { 5871 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5872 "Could not allocate read message buffer request"); 5873 return PTR_ERR(cqr); 5874 } 5875 5876 cqr->lpm = lpum; 5877 retry: 5878 cqr->startdev = device; 5879 cqr->memdev = device; 5880 cqr->block = NULL; 5881 cqr->expires = 10 * HZ; 5882 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5883 /* dasd_sleep_on_immediatly does not do complex error 5884 * recovery so clear erp flag and set retry counter to 5885 * do basic erp */ 5886 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5887 cqr->retries = 256; 5888 5889 /* Prepare for Read Subsystem Data */ 5890 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5891 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 5892 prssdp->order = PSF_ORDER_PRSSD; 5893 prssdp->suborder = 0x03; /* Message Buffer */ 5894 /* all other bytes of prssdp must be zero */ 5895 5896 ccw = cqr->cpaddr; 5897 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5898 ccw->count = sizeof(struct dasd_psf_prssd_data); 5899 ccw->flags |= CCW_FLAG_CC; 5900 ccw->flags |= CCW_FLAG_SLI; 5901 ccw->cda = virt_to_dma32(prssdp); 5902 5903 /* Read Subsystem Data - message buffer */ 5904 message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 5905 memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 5906 5907 ccw++; 5908 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5909 ccw->count = sizeof(struct dasd_rssd_messages); 5910 ccw->flags |= CCW_FLAG_SLI; 5911 ccw->cda = virt_to_dma32(message_buf); 5912 5913 cqr->buildclk = get_tod_clock(); 5914 cqr->status = DASD_CQR_FILLED; 5915 rc = dasd_sleep_on_immediatly(cqr); 5916 if (rc == 0) { 5917 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5918 message_buf = (struct dasd_rssd_messages *) 5919 (prssdp + 1); 5920 memcpy(messages, message_buf, 5921 sizeof(struct dasd_rssd_messages)); 5922 } else if (cqr->lpm) { 5923 /* 5924 * on z/VM we might not be able to do I/O on the requested path 5925 * but instead we get the required information on any path 5926 * so retry with open path mask 5927 */ 5928 cqr->lpm = 0; 5929 goto retry; 5930 } else 5931 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5932 "Reading messages failed with rc=%d\n" 5933 , rc); 5934 dasd_sfree_request(cqr, cqr->memdev); 5935 return rc; 5936 } 5937 dasd_eckd_query_host_access(struct dasd_device * device,struct dasd_psf_query_host_access * data)5938 static int dasd_eckd_query_host_access(struct dasd_device *device, 5939 struct dasd_psf_query_host_access *data) 5940 { 5941 struct dasd_eckd_private *private = device->private; 5942 struct dasd_psf_query_host_access *host_access; 5943 struct dasd_psf_prssd_data *prssdp; 5944 struct dasd_ccw_req *cqr; 5945 struct ccw1 *ccw; 5946 int rc; 5947 5948 /* not available for HYPER PAV alias devices */ 5949 if (!device->block && private->lcu->pav == HYPER_PAV) 5950 return -EOPNOTSUPP; 5951 5952 /* may not be supported by the storage server */ 5953 if (!(private->features.feature[14] & 0x80)) 5954 return -EOPNOTSUPP; 5955 5956 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 5957 sizeof(struct dasd_psf_prssd_data) + 1, 5958 device, NULL); 5959 if (IS_ERR(cqr)) { 5960 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5961 "Could not allocate read message buffer request"); 5962 return PTR_ERR(cqr); 5963 } 5964 host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 5965 if (!host_access) { 5966 dasd_sfree_request(cqr, device); 5967 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 5968 "Could not allocate host_access buffer"); 5969 return -ENOMEM; 5970 } 5971 cqr->startdev = device; 5972 cqr->memdev = device; 5973 cqr->block = NULL; 5974 cqr->retries = 256; 5975 cqr->expires = 10 * HZ; 5976 5977 /* Prepare for Read Subsystem Data */ 5978 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 5979 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 5980 prssdp->order = PSF_ORDER_PRSSD; 5981 prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 5982 /* LSS and Volume that will be queried */ 5983 prssdp->lss = private->conf.ned->ID; 5984 prssdp->volume = private->conf.ned->unit_addr; 5985 /* all other bytes of prssdp must be zero */ 5986 5987 ccw = cqr->cpaddr; 5988 ccw->cmd_code = DASD_ECKD_CCW_PSF; 5989 ccw->count = sizeof(struct dasd_psf_prssd_data); 5990 ccw->flags |= CCW_FLAG_CC; 5991 ccw->flags |= CCW_FLAG_SLI; 5992 ccw->cda = virt_to_dma32(prssdp); 5993 5994 /* Read Subsystem Data - query host access */ 5995 ccw++; 5996 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5997 ccw->count = sizeof(struct dasd_psf_query_host_access); 5998 ccw->flags |= CCW_FLAG_SLI; 5999 ccw->cda = virt_to_dma32(host_access); 6000 6001 cqr->buildclk = get_tod_clock(); 6002 cqr->status = DASD_CQR_FILLED; 6003 /* the command might not be supported, suppress error message */ 6004 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 6005 rc = dasd_sleep_on_interruptible(cqr); 6006 if (rc == 0) { 6007 *data = *host_access; 6008 } else { 6009 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 6010 "Reading host access data failed with rc=%d\n", 6011 rc); 6012 rc = -EOPNOTSUPP; 6013 } 6014 6015 dasd_sfree_request(cqr, cqr->memdev); 6016 kfree(host_access); 6017 return rc; 6018 } 6019 /* 6020 * return number of grouped devices 6021 */ dasd_eckd_host_access_count(struct dasd_device * device)6022 static int dasd_eckd_host_access_count(struct dasd_device *device) 6023 { 6024 struct dasd_psf_query_host_access *access; 6025 struct dasd_ckd_path_group_entry *entry; 6026 struct dasd_ckd_host_information *info; 6027 int count = 0; 6028 int rc, i; 6029 6030 access = kzalloc(sizeof(*access), GFP_NOIO); 6031 if (!access) { 6032 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 6033 "Could not allocate access buffer"); 6034 return -ENOMEM; 6035 } 6036 rc = dasd_eckd_query_host_access(device, access); 6037 if (rc) { 6038 kfree(access); 6039 return rc; 6040 } 6041 6042 info = (struct dasd_ckd_host_information *) 6043 access->host_access_information; 6044 for (i = 0; i < info->entry_count; i++) { 6045 entry = (struct dasd_ckd_path_group_entry *) 6046 (info->entry + i * info->entry_size); 6047 if (entry->status_flags & DASD_ECKD_PG_GROUPED) 6048 count++; 6049 } 6050 6051 kfree(access); 6052 return count; 6053 } 6054 6055 /* 6056 * write host access information to a sequential file 6057 */ dasd_hosts_print(struct dasd_device * device,struct seq_file * m)6058 static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 6059 { 6060 struct dasd_psf_query_host_access *access; 6061 struct dasd_ckd_path_group_entry *entry; 6062 struct dasd_ckd_host_information *info; 6063 char sysplex[9] = ""; 6064 int rc, i; 6065 6066 access = kzalloc(sizeof(*access), GFP_NOIO); 6067 if (!access) { 6068 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 6069 "Could not allocate access buffer"); 6070 return -ENOMEM; 6071 } 6072 rc = dasd_eckd_query_host_access(device, access); 6073 if (rc) { 6074 kfree(access); 6075 return rc; 6076 } 6077 6078 info = (struct dasd_ckd_host_information *) 6079 access->host_access_information; 6080 for (i = 0; i < info->entry_count; i++) { 6081 entry = (struct dasd_ckd_path_group_entry *) 6082 (info->entry + i * info->entry_size); 6083 /* PGID */ 6084 seq_printf(m, "pgid %*phN\n", 11, entry->pgid); 6085 /* FLAGS */ 6086 seq_printf(m, "status_flags %02x\n", entry->status_flags); 6087 /* SYSPLEX NAME */ 6088 memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 6089 EBCASC(sysplex, sizeof(sysplex)); 6090 seq_printf(m, "sysplex_name %8s\n", sysplex); 6091 /* SUPPORTED CYLINDER */ 6092 seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 6093 /* TIMESTAMP */ 6094 seq_printf(m, "timestamp %lu\n", (unsigned long) 6095 entry->timestamp); 6096 } 6097 kfree(access); 6098 6099 return 0; 6100 } 6101 6102 static struct dasd_device copy_relation_find_device(struct dasd_copy_relation * copy,char * busid)6103 *copy_relation_find_device(struct dasd_copy_relation *copy, 6104 char *busid) 6105 { 6106 int i; 6107 6108 for (i = 0; i < DASD_CP_ENTRIES; i++) { 6109 if (copy->entry[i].configured && 6110 strncmp(copy->entry[i].busid, busid, DASD_BUS_ID_SIZE) == 0) 6111 return copy->entry[i].device; 6112 } 6113 return NULL; 6114 } 6115 6116 /* 6117 * set the new active/primary device 6118 */ copy_pair_set_active(struct dasd_copy_relation * copy,char * new_busid,char * old_busid)6119 static void copy_pair_set_active(struct dasd_copy_relation *copy, char *new_busid, 6120 char *old_busid) 6121 { 6122 int i; 6123 6124 for (i = 0; i < DASD_CP_ENTRIES; i++) { 6125 if (copy->entry[i].configured && 6126 strncmp(copy->entry[i].busid, new_busid, 6127 DASD_BUS_ID_SIZE) == 0) { 6128 copy->active = ©->entry[i]; 6129 copy->entry[i].primary = true; 6130 } else if (copy->entry[i].configured && 6131 strncmp(copy->entry[i].busid, old_busid, 6132 DASD_BUS_ID_SIZE) == 0) { 6133 copy->entry[i].primary = false; 6134 } 6135 } 6136 } 6137 6138 /* 6139 * The function will swap the role of a given copy pair. 6140 * During the swap operation the relation of the blockdevice is disconnected 6141 * from the old primary and connected to the new. 6142 * 6143 * IO is paused on the block queue before swap and may be resumed afterwards. 6144 */ dasd_eckd_copy_pair_swap(struct dasd_device * device,char * prim_busid,char * sec_busid)6145 static int dasd_eckd_copy_pair_swap(struct dasd_device *device, char *prim_busid, 6146 char *sec_busid) 6147 { 6148 struct dasd_device *primary, *secondary; 6149 struct dasd_copy_relation *copy; 6150 struct dasd_block *block; 6151 struct gendisk *gdp; 6152 6153 copy = device->copy; 6154 if (!copy) 6155 return DASD_COPYPAIRSWAP_INVALID; 6156 primary = copy->active->device; 6157 if (!primary) 6158 return DASD_COPYPAIRSWAP_INVALID; 6159 /* double check if swap has correct primary */ 6160 if (strncmp(dev_name(&primary->cdev->dev), prim_busid, DASD_BUS_ID_SIZE) != 0) 6161 return DASD_COPYPAIRSWAP_PRIMARY; 6162 6163 secondary = copy_relation_find_device(copy, sec_busid); 6164 if (!secondary) 6165 return DASD_COPYPAIRSWAP_SECONDARY; 6166 6167 /* 6168 * usually the device should be quiesced for swap 6169 * for paranoia stop device and requeue requests again 6170 */ 6171 dasd_device_set_stop_bits(primary, DASD_STOPPED_PPRC); 6172 dasd_device_set_stop_bits(secondary, DASD_STOPPED_PPRC); 6173 dasd_generic_requeue_all_requests(primary); 6174 6175 /* swap DASD internal device <> block assignment */ 6176 block = primary->block; 6177 primary->block = NULL; 6178 secondary->block = block; 6179 block->base = secondary; 6180 /* set new primary device in COPY relation */ 6181 copy_pair_set_active(copy, sec_busid, prim_busid); 6182 6183 /* swap blocklayer device link */ 6184 gdp = block->gdp; 6185 dasd_add_link_to_gendisk(gdp, secondary); 6186 6187 /* re-enable device */ 6188 dasd_device_remove_stop_bits(primary, DASD_STOPPED_PPRC); 6189 dasd_device_remove_stop_bits(secondary, DASD_STOPPED_PPRC); 6190 dasd_schedule_device_bh(secondary); 6191 6192 return DASD_COPYPAIRSWAP_SUCCESS; 6193 } 6194 6195 /* 6196 * Perform Subsystem Function - Peer-to-Peer Remote Copy Extended Query 6197 */ dasd_eckd_query_pprc_status(struct dasd_device * device,struct dasd_pprc_data_sc4 * data)6198 static int dasd_eckd_query_pprc_status(struct dasd_device *device, 6199 struct dasd_pprc_data_sc4 *data) 6200 { 6201 struct dasd_pprc_data_sc4 *pprc_data; 6202 struct dasd_psf_prssd_data *prssdp; 6203 struct dasd_ccw_req *cqr; 6204 struct ccw1 *ccw; 6205 int rc; 6206 6207 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 6208 sizeof(*prssdp) + sizeof(*pprc_data) + 1, 6209 device, NULL); 6210 if (IS_ERR(cqr)) { 6211 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 6212 "Could not allocate query PPRC status request"); 6213 return PTR_ERR(cqr); 6214 } 6215 cqr->startdev = device; 6216 cqr->memdev = device; 6217 cqr->block = NULL; 6218 cqr->retries = 256; 6219 cqr->expires = 10 * HZ; 6220 6221 /* Prepare for Read Subsystem Data */ 6222 prssdp = (struct dasd_psf_prssd_data *)cqr->data; 6223 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 6224 prssdp->order = PSF_ORDER_PRSSD; 6225 prssdp->suborder = PSF_SUBORDER_PPRCEQ; 6226 prssdp->varies[0] = PPRCEQ_SCOPE_4; 6227 pprc_data = (struct dasd_pprc_data_sc4 *)(prssdp + 1); 6228 6229 ccw = cqr->cpaddr; 6230 ccw->cmd_code = DASD_ECKD_CCW_PSF; 6231 ccw->count = sizeof(struct dasd_psf_prssd_data); 6232 ccw->flags |= CCW_FLAG_CC; 6233 ccw->flags |= CCW_FLAG_SLI; 6234 ccw->cda = virt_to_dma32(prssdp); 6235 6236 /* Read Subsystem Data - query host access */ 6237 ccw++; 6238 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 6239 ccw->count = sizeof(*pprc_data); 6240 ccw->flags |= CCW_FLAG_SLI; 6241 ccw->cda = virt_to_dma32(pprc_data); 6242 6243 cqr->buildclk = get_tod_clock(); 6244 cqr->status = DASD_CQR_FILLED; 6245 6246 rc = dasd_sleep_on_interruptible(cqr); 6247 if (rc == 0) { 6248 *data = *pprc_data; 6249 } else { 6250 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 6251 "PPRC Extended Query failed with rc=%d\n", 6252 rc); 6253 rc = -EOPNOTSUPP; 6254 } 6255 6256 dasd_sfree_request(cqr, cqr->memdev); 6257 return rc; 6258 } 6259 6260 /* 6261 * ECKD NOP - no operation 6262 */ dasd_eckd_nop(struct dasd_device * device)6263 static int dasd_eckd_nop(struct dasd_device *device) 6264 { 6265 struct dasd_ccw_req *cqr; 6266 struct ccw1 *ccw; 6267 int rc; 6268 6269 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 1, device, NULL); 6270 if (IS_ERR(cqr)) { 6271 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 6272 "Could not allocate NOP request"); 6273 return PTR_ERR(cqr); 6274 } 6275 cqr->startdev = device; 6276 cqr->memdev = device; 6277 cqr->block = NULL; 6278 cqr->retries = 1; 6279 cqr->expires = 10 * HZ; 6280 6281 ccw = cqr->cpaddr; 6282 ccw->cmd_code = DASD_ECKD_CCW_NOP; 6283 ccw->flags |= CCW_FLAG_SLI; 6284 6285 cqr->buildclk = get_tod_clock(); 6286 cqr->status = DASD_CQR_FILLED; 6287 6288 rc = dasd_sleep_on_interruptible(cqr); 6289 if (rc != 0) { 6290 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 6291 "NOP failed with rc=%d\n", rc); 6292 rc = -EOPNOTSUPP; 6293 } 6294 dasd_sfree_request(cqr, cqr->memdev); 6295 return rc; 6296 } 6297 dasd_eckd_device_ping(struct dasd_device * device)6298 static int dasd_eckd_device_ping(struct dasd_device *device) 6299 { 6300 return dasd_eckd_nop(device); 6301 } 6302 6303 /* 6304 * Perform Subsystem Function - CUIR response 6305 */ 6306 static int dasd_eckd_psf_cuir_response(struct dasd_device * device,int response,__u32 message_id,__u8 lpum)6307 dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 6308 __u32 message_id, __u8 lpum) 6309 { 6310 struct dasd_psf_cuir_response *psf_cuir; 6311 int pos = pathmask_to_pos(lpum); 6312 struct dasd_ccw_req *cqr; 6313 struct ccw1 *ccw; 6314 int rc; 6315 6316 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 6317 sizeof(struct dasd_psf_cuir_response), 6318 device, NULL); 6319 6320 if (IS_ERR(cqr)) { 6321 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6322 "Could not allocate PSF-CUIR request"); 6323 return PTR_ERR(cqr); 6324 } 6325 6326 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 6327 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 6328 psf_cuir->cc = response; 6329 psf_cuir->chpid = device->path[pos].chpid; 6330 psf_cuir->message_id = message_id; 6331 psf_cuir->cssid = device->path[pos].cssid; 6332 psf_cuir->ssid = device->path[pos].ssid; 6333 ccw = cqr->cpaddr; 6334 ccw->cmd_code = DASD_ECKD_CCW_PSF; 6335 ccw->cda = virt_to_dma32(psf_cuir); 6336 ccw->flags = CCW_FLAG_SLI; 6337 ccw->count = sizeof(struct dasd_psf_cuir_response); 6338 6339 cqr->startdev = device; 6340 cqr->memdev = device; 6341 cqr->block = NULL; 6342 cqr->retries = 256; 6343 cqr->expires = 10*HZ; 6344 cqr->buildclk = get_tod_clock(); 6345 cqr->status = DASD_CQR_FILLED; 6346 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 6347 6348 rc = dasd_sleep_on(cqr); 6349 6350 dasd_sfree_request(cqr, cqr->memdev); 6351 return rc; 6352 } 6353 6354 /* 6355 * return configuration data that is referenced by record selector 6356 * if a record selector is specified or per default return the 6357 * conf_data pointer for the path specified by lpum 6358 */ dasd_eckd_get_ref_conf(struct dasd_device * device,__u8 lpum,struct dasd_cuir_message * cuir)6359 static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 6360 __u8 lpum, 6361 struct dasd_cuir_message *cuir) 6362 { 6363 struct dasd_conf_data *conf_data; 6364 int path, pos; 6365 6366 if (cuir->record_selector == 0) 6367 goto out; 6368 for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 6369 conf_data = device->path[pos].conf_data; 6370 if (conf_data->gneq.record_selector == 6371 cuir->record_selector) 6372 return conf_data; 6373 } 6374 out: 6375 return device->path[pathmask_to_pos(lpum)].conf_data; 6376 } 6377 6378 /* 6379 * This function determines the scope of a reconfiguration request by 6380 * analysing the path and device selection data provided in the CUIR request. 6381 * Returns a path mask containing CUIR affected paths for the give device. 6382 * 6383 * If the CUIR request does not contain the required information return the 6384 * path mask of the path the attention message for the CUIR request was reveived 6385 * on. 6386 */ dasd_eckd_cuir_scope(struct dasd_device * device,__u8 lpum,struct dasd_cuir_message * cuir)6387 static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 6388 struct dasd_cuir_message *cuir) 6389 { 6390 struct dasd_conf_data *ref_conf_data; 6391 unsigned long bitmask = 0, mask = 0; 6392 struct dasd_conf_data *conf_data; 6393 unsigned int pos, path; 6394 char *ref_gneq, *gneq; 6395 char *ref_ned, *ned; 6396 int tbcpm = 0; 6397 6398 /* if CUIR request does not specify the scope use the path 6399 the attention message was presented on */ 6400 if (!cuir->ned_map || 6401 !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 6402 return lpum; 6403 6404 /* get reference conf data */ 6405 ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 6406 /* reference ned is determined by ned_map field */ 6407 pos = 8 - ffs(cuir->ned_map); 6408 ref_ned = (char *)&ref_conf_data->neds[pos]; 6409 ref_gneq = (char *)&ref_conf_data->gneq; 6410 /* transfer 24 bit neq_map to mask */ 6411 mask = cuir->neq_map[2]; 6412 mask |= cuir->neq_map[1] << 8; 6413 mask |= cuir->neq_map[0] << 16; 6414 6415 for (path = 0; path < 8; path++) { 6416 /* initialise data per path */ 6417 bitmask = mask; 6418 conf_data = device->path[path].conf_data; 6419 pos = 8 - ffs(cuir->ned_map); 6420 ned = (char *) &conf_data->neds[pos]; 6421 /* compare reference ned and per path ned */ 6422 if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 6423 continue; 6424 gneq = (char *)&conf_data->gneq; 6425 /* compare reference gneq and per_path gneq under 6426 24 bit mask where mask bit 0 equals byte 7 of 6427 the gneq and mask bit 24 equals byte 31 */ 6428 while (bitmask) { 6429 pos = ffs(bitmask) - 1; 6430 if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 6431 != 0) 6432 break; 6433 clear_bit(pos, &bitmask); 6434 } 6435 if (bitmask) 6436 continue; 6437 /* device and path match the reference values 6438 add path to CUIR scope */ 6439 tbcpm |= 0x80 >> path; 6440 } 6441 return tbcpm; 6442 } 6443 dasd_eckd_cuir_notify_user(struct dasd_device * device,unsigned long paths,int action)6444 static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 6445 unsigned long paths, int action) 6446 { 6447 int pos; 6448 6449 while (paths) { 6450 /* get position of bit in mask */ 6451 pos = 8 - ffs(paths); 6452 /* get channel path descriptor from this position */ 6453 if (action == CUIR_QUIESCE) 6454 pr_warn("Service on the storage server caused path %x.%02x to go offline", 6455 device->path[pos].cssid, 6456 device->path[pos].chpid); 6457 else if (action == CUIR_RESUME) 6458 pr_info("Path %x.%02x is back online after service on the storage server", 6459 device->path[pos].cssid, 6460 device->path[pos].chpid); 6461 clear_bit(7 - pos, &paths); 6462 } 6463 } 6464 dasd_eckd_cuir_remove_path(struct dasd_device * device,__u8 lpum,struct dasd_cuir_message * cuir)6465 static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 6466 struct dasd_cuir_message *cuir) 6467 { 6468 unsigned long tbcpm; 6469 6470 tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 6471 /* nothing to do if path is not in use */ 6472 if (!(dasd_path_get_opm(device) & tbcpm)) 6473 return 0; 6474 if (!(dasd_path_get_opm(device) & ~tbcpm)) { 6475 /* no path would be left if the CUIR action is taken 6476 return error */ 6477 return -EINVAL; 6478 } 6479 /* remove device from operational path mask */ 6480 dasd_path_remove_opm(device, tbcpm); 6481 dasd_path_add_cuirpm(device, tbcpm); 6482 return tbcpm; 6483 } 6484 6485 /* 6486 * walk through all devices and build a path mask to quiesce them 6487 * return an error if the last path to a device would be removed 6488 * 6489 * if only part of the devices are quiesced and an error 6490 * occurs no onlining necessary, the storage server will 6491 * notify the already set offline devices again 6492 */ dasd_eckd_cuir_quiesce(struct dasd_device * device,__u8 lpum,struct dasd_cuir_message * cuir)6493 static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 6494 struct dasd_cuir_message *cuir) 6495 { 6496 struct dasd_eckd_private *private = device->private; 6497 struct alias_pav_group *pavgroup, *tempgroup; 6498 struct dasd_device *dev, *n; 6499 unsigned long paths = 0; 6500 unsigned long flags; 6501 int tbcpm; 6502 6503 /* active devices */ 6504 list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 6505 alias_list) { 6506 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6507 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6508 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6509 if (tbcpm < 0) 6510 goto out_err; 6511 paths |= tbcpm; 6512 } 6513 /* inactive devices */ 6514 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 6515 alias_list) { 6516 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6517 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6518 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6519 if (tbcpm < 0) 6520 goto out_err; 6521 paths |= tbcpm; 6522 } 6523 /* devices in PAV groups */ 6524 list_for_each_entry_safe(pavgroup, tempgroup, 6525 &private->lcu->grouplist, group) { 6526 list_for_each_entry_safe(dev, n, &pavgroup->baselist, 6527 alias_list) { 6528 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6529 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6530 spin_unlock_irqrestore( 6531 get_ccwdev_lock(dev->cdev), flags); 6532 if (tbcpm < 0) 6533 goto out_err; 6534 paths |= tbcpm; 6535 } 6536 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 6537 alias_list) { 6538 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6539 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6540 spin_unlock_irqrestore( 6541 get_ccwdev_lock(dev->cdev), flags); 6542 if (tbcpm < 0) 6543 goto out_err; 6544 paths |= tbcpm; 6545 } 6546 } 6547 /* notify user about all paths affected by CUIR action */ 6548 dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 6549 return 0; 6550 out_err: 6551 return tbcpm; 6552 } 6553 dasd_eckd_cuir_resume(struct dasd_device * device,__u8 lpum,struct dasd_cuir_message * cuir)6554 static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 6555 struct dasd_cuir_message *cuir) 6556 { 6557 struct dasd_eckd_private *private = device->private; 6558 struct alias_pav_group *pavgroup, *tempgroup; 6559 struct dasd_device *dev, *n; 6560 unsigned long paths = 0; 6561 int tbcpm; 6562 6563 /* 6564 * the path may have been added through a generic path event before 6565 * only trigger path verification if the path is not already in use 6566 */ 6567 list_for_each_entry_safe(dev, n, 6568 &private->lcu->active_devices, 6569 alias_list) { 6570 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6571 paths |= tbcpm; 6572 if (!(dasd_path_get_opm(dev) & tbcpm)) { 6573 dasd_path_add_tbvpm(dev, tbcpm); 6574 dasd_schedule_device_bh(dev); 6575 } 6576 } 6577 list_for_each_entry_safe(dev, n, 6578 &private->lcu->inactive_devices, 6579 alias_list) { 6580 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6581 paths |= tbcpm; 6582 if (!(dasd_path_get_opm(dev) & tbcpm)) { 6583 dasd_path_add_tbvpm(dev, tbcpm); 6584 dasd_schedule_device_bh(dev); 6585 } 6586 } 6587 /* devices in PAV groups */ 6588 list_for_each_entry_safe(pavgroup, tempgroup, 6589 &private->lcu->grouplist, 6590 group) { 6591 list_for_each_entry_safe(dev, n, 6592 &pavgroup->baselist, 6593 alias_list) { 6594 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6595 paths |= tbcpm; 6596 if (!(dasd_path_get_opm(dev) & tbcpm)) { 6597 dasd_path_add_tbvpm(dev, tbcpm); 6598 dasd_schedule_device_bh(dev); 6599 } 6600 } 6601 list_for_each_entry_safe(dev, n, 6602 &pavgroup->aliaslist, 6603 alias_list) { 6604 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6605 paths |= tbcpm; 6606 if (!(dasd_path_get_opm(dev) & tbcpm)) { 6607 dasd_path_add_tbvpm(dev, tbcpm); 6608 dasd_schedule_device_bh(dev); 6609 } 6610 } 6611 } 6612 /* notify user about all paths affected by CUIR action */ 6613 dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 6614 return 0; 6615 } 6616 dasd_eckd_handle_cuir(struct dasd_device * device,void * messages,__u8 lpum)6617 static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 6618 __u8 lpum) 6619 { 6620 struct dasd_cuir_message *cuir = messages; 6621 int response; 6622 6623 DBF_DEV_EVENT(DBF_WARNING, device, 6624 "CUIR request: %016llx %016llx %016llx %08x", 6625 ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 6626 ((u32 *)cuir)[3]); 6627 6628 if (cuir->code == CUIR_QUIESCE) { 6629 /* quiesce */ 6630 if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 6631 response = PSF_CUIR_LAST_PATH; 6632 else 6633 response = PSF_CUIR_COMPLETED; 6634 } else if (cuir->code == CUIR_RESUME) { 6635 /* resume */ 6636 dasd_eckd_cuir_resume(device, lpum, cuir); 6637 response = PSF_CUIR_COMPLETED; 6638 } else 6639 response = PSF_CUIR_NOT_SUPPORTED; 6640 6641 dasd_eckd_psf_cuir_response(device, response, 6642 cuir->message_id, lpum); 6643 DBF_DEV_EVENT(DBF_WARNING, device, 6644 "CUIR response: %d on message ID %08x", response, 6645 cuir->message_id); 6646 /* to make sure there is no attention left schedule work again */ 6647 device->discipline->check_attention(device, lpum); 6648 } 6649 dasd_eckd_oos_resume(struct dasd_device * device)6650 static void dasd_eckd_oos_resume(struct dasd_device *device) 6651 { 6652 struct dasd_eckd_private *private = device->private; 6653 struct alias_pav_group *pavgroup, *tempgroup; 6654 struct dasd_device *dev, *n; 6655 unsigned long flags; 6656 6657 spin_lock_irqsave(&private->lcu->lock, flags); 6658 list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 6659 alias_list) { 6660 if (dev->stopped & DASD_STOPPED_NOSPC) 6661 dasd_generic_space_avail(dev); 6662 } 6663 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 6664 alias_list) { 6665 if (dev->stopped & DASD_STOPPED_NOSPC) 6666 dasd_generic_space_avail(dev); 6667 } 6668 /* devices in PAV groups */ 6669 list_for_each_entry_safe(pavgroup, tempgroup, 6670 &private->lcu->grouplist, 6671 group) { 6672 list_for_each_entry_safe(dev, n, &pavgroup->baselist, 6673 alias_list) { 6674 if (dev->stopped & DASD_STOPPED_NOSPC) 6675 dasd_generic_space_avail(dev); 6676 } 6677 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 6678 alias_list) { 6679 if (dev->stopped & DASD_STOPPED_NOSPC) 6680 dasd_generic_space_avail(dev); 6681 } 6682 } 6683 spin_unlock_irqrestore(&private->lcu->lock, flags); 6684 } 6685 dasd_eckd_handle_oos(struct dasd_device * device,void * messages,__u8 lpum)6686 static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages, 6687 __u8 lpum) 6688 { 6689 struct dasd_oos_message *oos = messages; 6690 6691 switch (oos->code) { 6692 case REPO_WARN: 6693 case POOL_WARN: 6694 dev_warn(&device->cdev->dev, 6695 "Extent pool usage has reached a critical value\n"); 6696 dasd_eckd_oos_resume(device); 6697 break; 6698 case REPO_EXHAUST: 6699 case POOL_EXHAUST: 6700 dev_warn(&device->cdev->dev, 6701 "Extent pool is exhausted\n"); 6702 break; 6703 case REPO_RELIEVE: 6704 case POOL_RELIEVE: 6705 dev_info(&device->cdev->dev, 6706 "Extent pool physical space constraint has been relieved\n"); 6707 break; 6708 } 6709 6710 /* In any case, update related data */ 6711 dasd_eckd_read_ext_pool_info(device); 6712 6713 /* to make sure there is no attention left schedule work again */ 6714 device->discipline->check_attention(device, lpum); 6715 } 6716 dasd_eckd_check_attention_work(struct work_struct * work)6717 static void dasd_eckd_check_attention_work(struct work_struct *work) 6718 { 6719 struct check_attention_work_data *data; 6720 struct dasd_rssd_messages *messages; 6721 struct dasd_device *device; 6722 int rc; 6723 6724 data = container_of(work, struct check_attention_work_data, worker); 6725 device = data->device; 6726 messages = kzalloc(sizeof(*messages), GFP_KERNEL); 6727 if (!messages) { 6728 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6729 "Could not allocate attention message buffer"); 6730 goto out; 6731 } 6732 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 6733 if (rc) 6734 goto out; 6735 6736 if (messages->length == ATTENTION_LENGTH_CUIR && 6737 messages->format == ATTENTION_FORMAT_CUIR) 6738 dasd_eckd_handle_cuir(device, messages, data->lpum); 6739 if (messages->length == ATTENTION_LENGTH_OOS && 6740 messages->format == ATTENTION_FORMAT_OOS) 6741 dasd_eckd_handle_oos(device, messages, data->lpum); 6742 6743 out: 6744 dasd_put_device(device); 6745 kfree(messages); 6746 kfree(data); 6747 } 6748 dasd_eckd_check_attention(struct dasd_device * device,__u8 lpum)6749 static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 6750 { 6751 struct check_attention_work_data *data; 6752 6753 data = kzalloc(sizeof(*data), GFP_ATOMIC); 6754 if (!data) 6755 return -ENOMEM; 6756 INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 6757 dasd_get_device(device); 6758 data->device = device; 6759 data->lpum = lpum; 6760 schedule_work(&data->worker); 6761 return 0; 6762 } 6763 dasd_eckd_disable_hpf_path(struct dasd_device * device,__u8 lpum)6764 static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 6765 { 6766 if (~lpum & dasd_path_get_opm(device)) { 6767 dasd_path_add_nohpfpm(device, lpum); 6768 dasd_path_remove_opm(device, lpum); 6769 dev_err(&device->cdev->dev, 6770 "Channel path %02X lost HPF functionality and is disabled\n", 6771 lpum); 6772 return 1; 6773 } 6774 return 0; 6775 } 6776 dasd_eckd_disable_hpf_device(struct dasd_device * device)6777 static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 6778 { 6779 struct dasd_eckd_private *private = device->private; 6780 6781 dev_err(&device->cdev->dev, 6782 "High Performance FICON disabled\n"); 6783 private->fcx_max_data = 0; 6784 } 6785 dasd_eckd_hpf_enabled(struct dasd_device * device)6786 static int dasd_eckd_hpf_enabled(struct dasd_device *device) 6787 { 6788 struct dasd_eckd_private *private = device->private; 6789 6790 return private->fcx_max_data ? 1 : 0; 6791 } 6792 dasd_eckd_handle_hpf_error(struct dasd_device * device,struct irb * irb)6793 static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 6794 struct irb *irb) 6795 { 6796 struct dasd_eckd_private *private = device->private; 6797 6798 if (!private->fcx_max_data) { 6799 /* sanity check for no HPF, the error makes no sense */ 6800 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6801 "Trying to disable HPF for a non HPF device"); 6802 return; 6803 } 6804 if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 6805 dasd_eckd_disable_hpf_device(device); 6806 } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 6807 if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 6808 return; 6809 dasd_eckd_disable_hpf_device(device); 6810 dasd_path_set_tbvpm(device, 6811 dasd_path_get_hpfpm(device)); 6812 } 6813 /* 6814 * prevent that any new I/O ist started on the device and schedule a 6815 * requeue of existing requests 6816 */ 6817 dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 6818 dasd_schedule_requeue(device); 6819 } 6820 dasd_eckd_max_sectors(struct dasd_block * block)6821 static unsigned int dasd_eckd_max_sectors(struct dasd_block *block) 6822 { 6823 if (block->base->features & DASD_FEATURE_USERAW) { 6824 /* 6825 * the max_blocks value for raw_track access is 256 6826 * it is higher than the native ECKD value because we 6827 * only need one ccw per track 6828 * so the max_hw_sectors are 6829 * 2048 x 512B = 1024kB = 16 tracks 6830 */ 6831 return DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift; 6832 } 6833 6834 return DASD_ECKD_MAX_BLOCKS << block->s2b_shift; 6835 } 6836 6837 static struct ccw_driver dasd_eckd_driver = { 6838 .driver = { 6839 .name = "dasd-eckd", 6840 .owner = THIS_MODULE, 6841 .dev_groups = dasd_dev_groups, 6842 }, 6843 .ids = dasd_eckd_ids, 6844 .probe = dasd_eckd_probe, 6845 .remove = dasd_generic_remove, 6846 .set_offline = dasd_generic_set_offline, 6847 .set_online = dasd_eckd_set_online, 6848 .notify = dasd_generic_notify, 6849 .path_event = dasd_generic_path_event, 6850 .shutdown = dasd_generic_shutdown, 6851 .uc_handler = dasd_generic_uc_handler, 6852 .int_class = IRQIO_DAS, 6853 }; 6854 6855 static struct dasd_discipline dasd_eckd_discipline = { 6856 .owner = THIS_MODULE, 6857 .name = "ECKD", 6858 .ebcname = "ECKD", 6859 .check_device = dasd_eckd_check_characteristics, 6860 .uncheck_device = dasd_eckd_uncheck_device, 6861 .do_analysis = dasd_eckd_do_analysis, 6862 .pe_handler = dasd_eckd_pe_handler, 6863 .basic_to_ready = dasd_eckd_basic_to_ready, 6864 .online_to_ready = dasd_eckd_online_to_ready, 6865 .basic_to_known = dasd_eckd_basic_to_known, 6866 .max_sectors = dasd_eckd_max_sectors, 6867 .fill_geometry = dasd_eckd_fill_geometry, 6868 .start_IO = dasd_start_IO, 6869 .term_IO = dasd_term_IO, 6870 .handle_terminated_request = dasd_eckd_handle_terminated_request, 6871 .format_device = dasd_eckd_format_device, 6872 .check_device_format = dasd_eckd_check_device_format, 6873 .erp_action = dasd_eckd_erp_action, 6874 .erp_postaction = dasd_eckd_erp_postaction, 6875 .check_for_device_change = dasd_eckd_check_for_device_change, 6876 .build_cp = dasd_eckd_build_alias_cp, 6877 .free_cp = dasd_eckd_free_alias_cp, 6878 .dump_sense = dasd_eckd_dump_sense, 6879 .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 6880 .fill_info = dasd_eckd_fill_info, 6881 .ioctl = dasd_eckd_ioctl, 6882 .reload = dasd_eckd_reload_device, 6883 .get_uid = dasd_eckd_get_uid, 6884 .kick_validate = dasd_eckd_kick_validate_server, 6885 .check_attention = dasd_eckd_check_attention, 6886 .host_access_count = dasd_eckd_host_access_count, 6887 .hosts_print = dasd_hosts_print, 6888 .handle_hpf_error = dasd_eckd_handle_hpf_error, 6889 .disable_hpf = dasd_eckd_disable_hpf_device, 6890 .hpf_enabled = dasd_eckd_hpf_enabled, 6891 .reset_path = dasd_eckd_reset_path, 6892 .is_ese = dasd_eckd_is_ese, 6893 .space_allocated = dasd_eckd_space_allocated, 6894 .space_configured = dasd_eckd_space_configured, 6895 .logical_capacity = dasd_eckd_logical_capacity, 6896 .release_space = dasd_eckd_release_space, 6897 .ext_pool_id = dasd_eckd_ext_pool_id, 6898 .ext_size = dasd_eckd_ext_size, 6899 .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel, 6900 .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld, 6901 .ext_pool_oos = dasd_eckd_ext_pool_oos, 6902 .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust, 6903 .ese_format = dasd_eckd_ese_format, 6904 .ese_read = dasd_eckd_ese_read, 6905 .pprc_status = dasd_eckd_query_pprc_status, 6906 .pprc_enabled = dasd_eckd_pprc_enabled, 6907 .copy_pair_swap = dasd_eckd_copy_pair_swap, 6908 .device_ping = dasd_eckd_device_ping, 6909 }; 6910 6911 static int __init dasd_eckd_init(void)6912 dasd_eckd_init(void) 6913 { 6914 int ret; 6915 6916 ASCEBC(dasd_eckd_discipline.ebcname, 4); 6917 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 6918 GFP_KERNEL | GFP_DMA); 6919 if (!dasd_reserve_req) 6920 return -ENOMEM; 6921 dasd_vol_info_req = kmalloc(sizeof(*dasd_vol_info_req), 6922 GFP_KERNEL | GFP_DMA); 6923 if (!dasd_vol_info_req) { 6924 kfree(dasd_reserve_req); 6925 return -ENOMEM; 6926 } 6927 pe_handler_worker = kmalloc(sizeof(*pe_handler_worker), 6928 GFP_KERNEL | GFP_DMA); 6929 if (!pe_handler_worker) { 6930 kfree(dasd_reserve_req); 6931 kfree(dasd_vol_info_req); 6932 return -ENOMEM; 6933 } 6934 rawpadpage = (void *)__get_free_page(GFP_KERNEL); 6935 if (!rawpadpage) { 6936 kfree(pe_handler_worker); 6937 kfree(dasd_reserve_req); 6938 kfree(dasd_vol_info_req); 6939 return -ENOMEM; 6940 } 6941 ret = ccw_driver_register(&dasd_eckd_driver); 6942 if (!ret) 6943 wait_for_device_probe(); 6944 else { 6945 kfree(pe_handler_worker); 6946 kfree(dasd_reserve_req); 6947 kfree(dasd_vol_info_req); 6948 free_page((unsigned long)rawpadpage); 6949 } 6950 return ret; 6951 } 6952 6953 static void __exit dasd_eckd_cleanup(void)6954 dasd_eckd_cleanup(void) 6955 { 6956 ccw_driver_unregister(&dasd_eckd_driver); 6957 kfree(pe_handler_worker); 6958 kfree(dasd_reserve_req); 6959 free_page((unsigned long)rawpadpage); 6960 } 6961 6962 module_init(dasd_eckd_init); 6963 module_exit(dasd_eckd_cleanup); 6964