1 /*************************************************************************** 2 * 3 * cdutils.c : CD/DVD utilities 4 * 5 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 6 * Use is subject to license terms. 7 * 8 * Licensed under the Academic Free License version 2.1 9 * 10 **************************************************************************/ 11 12 #pragma ident "%Z%%M% %I% %E% SMI" 13 14 #ifdef HAVE_CONFIG_H 15 # include <config.h> 16 #endif 17 18 #include <stdio.h> 19 #include <sys/types.h> 20 #include <sys/scsi/impl/uscsi.h> 21 #include <string.h> 22 #include <strings.h> 23 #include <unistd.h> 24 #include <stdlib.h> 25 #include <errno.h> 26 #include <fcntl.h> 27 #include <sys/dkio.h> 28 #include <libintl.h> 29 30 #include <logger.h> 31 32 #include "cdutils.h" 33 34 #define RQLEN 32 35 #define SENSE_KEY(rqbuf) (rqbuf[2]) /* scsi error category */ 36 #define ASC(rqbuf) (rqbuf[12]) /* additional sense code */ 37 #define ASCQ(rqbuf) (rqbuf[13]) /* ASC qualifier */ 38 39 #define GET16(a) (((a)[0] << 8) | (a)[1]) 40 #define GET32(a) (((a)[0] << 24) | ((a)[1] << 16) | ((a)[2] << 8) | (a)[3]) 41 42 #define CD_USCSI_TIMEOUT 60 43 44 void 45 uscsi_cmd_init(struct uscsi_cmd *scmd, char *cdb, int cdblen) 46 { 47 bzero(scmd, sizeof (*scmd)); 48 bzero(cdb, cdblen); 49 scmd->uscsi_cdb = cdb; 50 } 51 52 int 53 uscsi(int fd, struct uscsi_cmd *scmd) 54 { 55 char rqbuf[RQLEN]; 56 int ret; 57 int i, retries, total_retries; 58 int max_retries = 20; 59 60 scmd->uscsi_flags |= USCSI_RQENABLE; 61 scmd->uscsi_rqlen = RQLEN; 62 scmd->uscsi_rqbuf = rqbuf; 63 64 for (retries = 0; retries < max_retries; retries++) { 65 scmd->uscsi_status = 0; 66 memset(rqbuf, 0, RQLEN); 67 68 ret = ioctl(fd, USCSICMD, scmd); 69 70 if ((ret == 0) && (scmd->uscsi_status == 2)) { 71 ret = -1; 72 errno = EIO; 73 } 74 if ((ret < 0) && (scmd->uscsi_status == 2)) { 75 /* 76 * The drive is not ready to recieve commands but 77 * may be in the process of becoming ready. 78 * sleep for a short time then retry command. 79 * SENSE/ASC = 2/4 : not ready 80 * ASCQ = 0 Not Reportable. 81 * ASCQ = 1 Becoming ready. 82 * ASCQ = 4 FORMAT in progress. 83 * ASCQ = 7 Operation in progress. 84 */ 85 if ((SENSE_KEY(rqbuf) == 2) && (ASC(rqbuf) == 4) && 86 ((ASCQ(rqbuf) == 0) || (ASCQ(rqbuf) == 1) || 87 (ASCQ(rqbuf) == 4)) || (ASCQ(rqbuf) == 7)) { 88 total_retries++; 89 sleep(1); 90 continue; 91 } 92 93 /* 94 * Device is not ready to transmit or a device reset 95 * has occurred. wait for a short period of time then 96 * retry the command. 97 */ 98 if ((SENSE_KEY(rqbuf) == 6) && ((ASC(rqbuf) == 0x28) || 99 (ASC(rqbuf) == 0x29))) { 100 sleep(1); 101 total_retries++; 102 continue; 103 } 104 /* 105 * Blank Sense, we don't know what the error is or if 106 * the command succeeded, Hope for the best. Some 107 * drives return blank sense periodically and will 108 * fail if this is removed. 109 */ 110 if ((SENSE_KEY(rqbuf) == 0) && (ASC(rqbuf) == 0) && 111 (ASCQ(rqbuf) == 0)) { 112 ret = 0; 113 break; 114 } 115 116 HAL_DEBUG (("cmd: 0x%02x ret:%i status:%02x " 117 " sense: %02x ASC: %02x ASCQ:%02x\n", 118 (uchar_t)scmd->uscsi_cdb[0], ret, 119 scmd->uscsi_status, 120 (uchar_t)SENSE_KEY(rqbuf), 121 (uchar_t)ASC(rqbuf), (uchar_t)ASCQ(rqbuf))); 122 } 123 124 break; 125 } 126 127 if (retries) { 128 HAL_DEBUG (("total retries: %d\n", total_retries)); 129 } 130 131 return (ret); 132 } 133 134 int 135 mode_sense(int fd, uchar_t pc, int dbd, int page_len, uchar_t *buffer) 136 { 137 struct uscsi_cmd scmd; 138 char cdb[16]; 139 140 uscsi_cmd_init(&scmd, cdb, sizeof (cdb)); 141 scmd.uscsi_flags = USCSI_READ|USCSI_SILENT; 142 scmd.uscsi_buflen = page_len; 143 scmd.uscsi_bufaddr = (char *)buffer; 144 scmd.uscsi_timeout = CD_USCSI_TIMEOUT; 145 scmd.uscsi_cdblen = 0xa; 146 scmd.uscsi_cdb[0] = 0x5a; /* MODE SENSE 10 */ 147 if (dbd) { 148 scmd.uscsi_cdb[1] = 0x8; /* no block descriptors */ 149 } 150 scmd.uscsi_cdb[2] = pc; 151 scmd.uscsi_cdb[7] = (page_len >> 8) & 0xff; 152 scmd.uscsi_cdb[8] = page_len & 0xff; 153 154 return (uscsi(fd, &scmd) == 0); 155 } 156 157 /* 158 * will get the mode page only i.e. will strip off the header. 159 */ 160 int 161 get_mode_page(int fd, int page_no, int pc, int buf_len, uchar_t *buffer, int *plen) 162 { 163 int ret; 164 uchar_t byte2; 165 uchar_t buf[256]; 166 uint_t header_len, page_len, copy_cnt; 167 168 byte2 = (uchar_t)(((pc << 6) & 0xC0) | (page_no & 0x3f)); 169 170 /* Ask 254 bytes only to make our IDE driver happy */ 171 if ((ret = mode_sense(fd, byte2, 1, 254, buf)) == 0) { 172 return (0); 173 } 174 175 header_len = 8 + GET16(&buf[6]); 176 page_len = buf[header_len + 1] + 2; 177 178 copy_cnt = (page_len > buf_len) ? buf_len : page_len; 179 (void) memcpy(buffer, &buf[header_len], copy_cnt); 180 181 if (plen) { 182 *plen = page_len; 183 } 184 185 return (1); 186 } 187 188 /* Get information about the Logical Unit's capabilities */ 189 int 190 get_configuration(int fd, uint16_t feature, int bufsize, uchar_t *buf) 191 { 192 struct uscsi_cmd scmd; 193 char cdb[16]; 194 195 uscsi_cmd_init(&scmd, cdb, sizeof (cdb)); 196 scmd.uscsi_flags = USCSI_READ|USCSI_SILENT; 197 scmd.uscsi_timeout = CD_USCSI_TIMEOUT; 198 scmd.uscsi_cdb[0] = 0x46; /* GET CONFIGURATION */ 199 scmd.uscsi_cdb[1] = 0x2; /* request type */ 200 scmd.uscsi_cdb[2] = (feature >> 8) & 0xff; /* starting feature # */ 201 scmd.uscsi_cdb[3] = feature & 0xff; 202 scmd.uscsi_cdb[7] = (bufsize >> 8) & 0xff; /* allocation length */ 203 scmd.uscsi_cdb[8] = bufsize & 0xff; 204 scmd.uscsi_cdblen = 10; 205 scmd.uscsi_bufaddr = (char *)buf; 206 scmd.uscsi_buflen = bufsize; 207 208 return (uscsi(fd, &scmd) == 0); 209 } 210 211 boolean_t 212 get_current_profile(int fd, int *profile) 213 { 214 size_t i; 215 uchar_t smallbuf[4]; 216 size_t buflen; 217 uchar_t *bufp; 218 int ret = B_FALSE; 219 220 /* first determine amount of memory needed to hold all profiles */ 221 if (get_configuration(fd, 0, 4, &smallbuf[0])) { 222 buflen = GET32(smallbuf) + 4; 223 bufp = (uchar_t *)malloc(buflen); 224 225 /* now get all profiles */ 226 if (get_configuration(fd, 0, buflen, bufp)) { 227 *profile = GET16(&bufp[6]); 228 ret = B_TRUE; 229 } 230 free(bufp); 231 } 232 233 return (ret); 234 } 235 236 void 237 walk_profiles(int fd, int (*f)(void *, int, boolean_t), void *arg) 238 { 239 size_t i; 240 uint16_t profile, current_profile; 241 uchar_t smallbuf[4]; 242 size_t buflen; 243 uchar_t *bufp; 244 int ret; 245 246 /* first determine amount of memory needed to hold all profiles */ 247 if (get_configuration(fd, 0, 4, &smallbuf[0])) { 248 buflen = GET32(smallbuf) + 4; 249 bufp = (uchar_t *)malloc(buflen); 250 251 /* now get all profiles */ 252 if (get_configuration(fd, 0, buflen, bufp)) { 253 current_profile = GET16(&bufp[6]); 254 for (i = 8 + 4; i < buflen; i += 4) { 255 profile = GET16(&bufp[i]); 256 ret = f(arg, profile, (profile == current_profile)); 257 if (ret == CDUTIL_WALK_STOP) { 258 break; 259 } 260 } 261 } 262 263 free(bufp); 264 } 265 } 266 267 /* retrieve speed list from the Write Speed Performance Descriptor Blocks 268 */ 269 void 270 get_write_speeds(uchar_t *page, int n, intlist_t **speeds, int *n_speeds, intlist_t **speeds_mem) 271 { 272 uchar_t *p = page + 2; 273 int i; 274 intlist_t **nextp; 275 intlist_t *current; 276 boolean_t skip; 277 278 *n_speeds = 0; 279 *speeds = NULL; 280 *speeds_mem = (intlist_t *)calloc(n, sizeof (intlist_t)); 281 if (*speeds_mem == NULL) { 282 return; 283 } 284 285 for (i = 0; i < n; i++, p += 4) { 286 current = &(*speeds_mem)[i]; 287 current->val = GET16(p); 288 289 /* keep the list sorted */ 290 skip = B_FALSE; 291 for (nextp = speeds; *nextp != NULL; nextp = &((*nextp)->next)) { 292 if (current->val == (*nextp)->val) { 293 skip = B_TRUE; /* skip duplicates */ 294 break; 295 } else if (current->val > (*nextp)->val) { 296 break; 297 } 298 } 299 if (!skip) { 300 current->next = *nextp; 301 *nextp = current; 302 *n_speeds++; 303 } 304 } 305 } 306 307 void 308 get_read_write_speeds(int fd, int *read_speed, int *write_speed, 309 intlist_t **speeds, int *n_speeds, intlist_t **speeds_mem) 310 { 311 int page_len; 312 uchar_t p[254]; 313 int n; /* number of write speed performance descriptor blocks */ 314 315 *read_speed = *write_speed = 0; 316 *speeds = *speeds_mem = NULL; 317 318 if (!get_mode_page(fd, 0x2A, 0, sizeof (p), p, &page_len)) { 319 return; 320 } 321 322 if (page_len > 8) { 323 *read_speed = GET16(&p[8]); 324 } 325 if (page_len > 18) { 326 *write_speed = GET16(&p[18]); 327 } 328 if (page_len < 28) { 329 printf("MMC-2\n"); 330 return; 331 } else { 332 printf("MMC-3\n"); 333 } 334 335 *write_speed = GET16(&p[28]); 336 337 if (page_len < 30) { 338 return; 339 } 340 341 /* retrieve speed list */ 342 n = GET16(&p[30]); 343 n = min(n, (sizeof (p) - 32) / 4); 344 345 get_write_speeds(&p[32], n, speeds, n_speeds, speeds_mem); 346 347 if (*speeds != NULL) { 348 *write_speed = max(*write_speed, (*speeds)[0].val); 349 } 350 } 351 352 boolean_t 353 get_disc_info(int fd, disc_info_t *di) 354 { 355 struct uscsi_cmd scmd; 356 char cdb[16]; 357 uint8_t buf[32]; 358 int bufsize = sizeof (buf); 359 360 bzero(buf, bufsize); 361 uscsi_cmd_init(&scmd, cdb, sizeof (cdb)); 362 scmd.uscsi_flags = USCSI_READ|USCSI_SILENT; 363 scmd.uscsi_timeout = CD_USCSI_TIMEOUT; 364 scmd.uscsi_cdb[0] = 0x51; /* READ DISC INFORMATION */ 365 scmd.uscsi_cdb[7] = (bufsize >> 8) & 0xff; /* allocation length */ 366 scmd.uscsi_cdb[8] = bufsize & 0xff; 367 scmd.uscsi_cdblen = 10; 368 scmd.uscsi_bufaddr = (char *)buf; 369 scmd.uscsi_buflen = bufsize; 370 371 if ((uscsi(fd, &scmd)) != 0) { 372 return (B_FALSE); 373 } 374 375 /* 376 * According to MMC-5 6.22.3.2, the Disc Information Length should be 377 * 32+8*(Number of OPC Tables). Some devices, like U3 sticks, return 0. 378 * Yet some drives can return less than 32. We only need the first 22. 379 */ 380 if (GET16(&buf[0]) < 22) { 381 return (B_FALSE); 382 } 383 384 di->disc_status = buf[2] & 0x03; 385 di->erasable = buf[2] & 0x10; 386 if ((buf[21] != 0) && (buf[21] != 0xff)) { 387 di->capacity = ((buf[21] * 60) + buf[22]) * 75; 388 } else { 389 di->capacity = 0; 390 } 391 392 return (B_TRUE); 393 } 394 395 /* 396 * returns current/maximum format capacity in bytes 397 */ 398 boolean_t 399 read_format_capacity(int fd, uint64_t *capacity) 400 { 401 struct uscsi_cmd scmd; 402 char cdb[16]; 403 uint8_t buf[32]; 404 int bufsize = sizeof (buf); 405 uint32_t num_blocks; 406 uint32_t block_len; 407 408 bzero(buf, bufsize); 409 uscsi_cmd_init(&scmd, cdb, sizeof (cdb)); 410 scmd.uscsi_flags = USCSI_READ|USCSI_SILENT; 411 scmd.uscsi_timeout = CD_USCSI_TIMEOUT; 412 scmd.uscsi_cdb[0] = 0x23; /* READ FORMAT CAPACITIRES */ 413 scmd.uscsi_cdb[7] = (bufsize >> 8) & 0xff; /* allocation length */ 414 scmd.uscsi_cdb[8] = bufsize & 0xff; 415 scmd.uscsi_cdblen = 12; 416 scmd.uscsi_bufaddr = (char *)buf; 417 scmd.uscsi_buflen = bufsize; 418 419 if ((uscsi(fd, &scmd)) != 0) { 420 return (B_FALSE); 421 } 422 423 num_blocks = (uint32_t)(buf[4] << 24) + (buf[5] << 16) + (buf[6] << 8) + buf[7]; 424 block_len = (uint32_t)(buf[9] << 16) + (buf[10] << 8) + buf[11]; 425 *capacity = (uint64_t)num_blocks * block_len; 426 427 return (B_TRUE); 428 } 429 430 boolean_t 431 get_media_info(int fd, struct dk_minfo *minfop) 432 { 433 return (ioctl(fd, DKIOCGMEDIAINFO, minfop) != -1); 434 } 435 436 /* 437 * given current profile, use the best method for determining 438 * disc capacity (in bytes) 439 */ 440 boolean_t 441 get_disc_capacity_for_profile(int fd, int profile, uint64_t *capacity) 442 { 443 struct dk_minfo mi; 444 disc_info_t di; 445 boolean_t ret = B_FALSE; 446 447 switch (profile) { 448 case 0x08: /* CD-ROM */ 449 case 0x10: /* DVD-ROM */ 450 if (get_media_info(fd, &mi) && (mi.dki_capacity > 1)) { 451 *capacity = mi.dki_capacity * mi.dki_lbsize; 452 ret = B_TRUE; 453 } 454 break; 455 default: 456 if (read_format_capacity(fd, capacity) && (*capacity > 0)) { 457 ret = B_TRUE; 458 } else if (get_disc_info(fd, &di) && (di.capacity > 0)) { 459 if (get_media_info(fd, &mi)) { 460 *capacity = di.capacity * mi.dki_lbsize; 461 ret = B_TRUE; 462 } 463 } 464 } 465 466 return (ret); 467 } 468 469 boolean_t 470 read_toc(int fd, int format, int trackno, int buflen, uchar_t *buf) 471 { 472 struct uscsi_cmd scmd; 473 char cdb[16]; 474 475 bzero(buf, buflen); 476 uscsi_cmd_init(&scmd, cdb, sizeof (cdb)); 477 scmd.uscsi_flags = USCSI_READ|USCSI_SILENT; 478 scmd.uscsi_timeout = CD_USCSI_TIMEOUT; 479 scmd.uscsi_cdb[0] = 0x43 /* READ_TOC_CMD */; 480 scmd.uscsi_cdb[2] = format & 0xf; 481 scmd.uscsi_cdb[6] = trackno; 482 scmd.uscsi_cdb[8] = buflen & 0xff; 483 scmd.uscsi_cdb[7] = (buflen >> 8) & 0xff; 484 scmd.uscsi_cdblen = 10; 485 scmd.uscsi_bufaddr = (char *)buf; 486 scmd.uscsi_buflen = buflen; 487 488 if ((uscsi(fd, &scmd)) != 0) { 489 return (B_FALSE); 490 } 491 492 return (B_TRUE); 493 } 494