Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/cam/cam.c
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1 /*- 2 * Generic utility routines for the Common Access Method layer. 3 * 4 * Copyright (c) 1997 Justin T. Gibbs. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions, and the following disclaimer, 12 * without modification, immediately at the beginning of the file. 13 * 2. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD: releng/10.0/sys/cam/cam.c 248922 2013-03-29 22:58:15Z smh $"); 31 32 #include <sys/param.h> 33 #ifdef _KERNEL 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/sysctl.h> 37 #else /* _KERNEL */ 38 #include <stdlib.h> 39 #include <stdio.h> 40 #include <string.h> 41 #include <camlib.h> 42 #endif /* _KERNEL */ 43 44 #include <cam/cam.h> 45 #include <cam/cam_ccb.h> 46 #include <cam/scsi/scsi_all.h> 47 #include <cam/scsi/smp_all.h> 48 #include <sys/sbuf.h> 49 50 #ifdef _KERNEL 51 #include <sys/libkern.h> 52 #include <cam/cam_queue.h> 53 #include <cam/cam_xpt.h> 54 55 FEATURE(scbus, "SCSI devices support"); 56 57 #endif 58 59 static int camstatusentrycomp(const void *key, const void *member); 60 61 const struct cam_status_entry cam_status_table[] = { 62 { CAM_REQ_INPROG, "CCB request is in progress" }, 63 { CAM_REQ_CMP, "CCB request completed without error" }, 64 { CAM_REQ_ABORTED, "CCB request aborted by the host" }, 65 { CAM_UA_ABORT, "Unable to abort CCB request" }, 66 { CAM_REQ_CMP_ERR, "CCB request completed with an error" }, 67 { CAM_BUSY, "CAM subsystem is busy" }, 68 { CAM_REQ_INVALID, "CCB request was invalid" }, 69 { CAM_PATH_INVALID, "Supplied Path ID is invalid" }, 70 { CAM_DEV_NOT_THERE, "Device Not Present" }, 71 { CAM_UA_TERMIO, "Unable to terminate I/O CCB request" }, 72 { CAM_SEL_TIMEOUT, "Selection Timeout" }, 73 { CAM_CMD_TIMEOUT, "Command timeout" }, 74 { CAM_SCSI_STATUS_ERROR, "SCSI Status Error" }, 75 { CAM_MSG_REJECT_REC, "Message Reject Reveived" }, 76 { CAM_SCSI_BUS_RESET, "SCSI Bus Reset Sent/Received" }, 77 { CAM_UNCOR_PARITY, "Uncorrectable parity/CRC error" }, 78 { CAM_AUTOSENSE_FAIL, "Auto-Sense Retrieval Failed" }, 79 { CAM_NO_HBA, "No HBA Detected" }, 80 { CAM_DATA_RUN_ERR, "Data Overrun error" }, 81 { CAM_UNEXP_BUSFREE, "Unexpected Bus Free" }, 82 { CAM_SEQUENCE_FAIL, "Target Bus Phase Sequence Failure" }, 83 { CAM_CCB_LEN_ERR, "CCB length supplied is inadequate" }, 84 { CAM_PROVIDE_FAIL, "Unable to provide requested capability" }, 85 { CAM_BDR_SENT, "SCSI BDR Message Sent" }, 86 { CAM_REQ_TERMIO, "CCB request terminated by the host" }, 87 { CAM_UNREC_HBA_ERROR, "Unrecoverable Host Bus Adapter Error" }, 88 { CAM_REQ_TOO_BIG, "The request was too large for this host" }, 89 { CAM_REQUEUE_REQ, "Unconditionally Re-queue Request", }, 90 { CAM_ATA_STATUS_ERROR, "ATA Status Error" }, 91 { CAM_SCSI_IT_NEXUS_LOST,"Initiator/Target Nexus Lost" }, 92 { CAM_SMP_STATUS_ERROR, "SMP Status Error" }, 93 { CAM_IDE, "Initiator Detected Error Message Received" }, 94 { CAM_RESRC_UNAVAIL, "Resource Unavailable" }, 95 { CAM_UNACKED_EVENT, "Unacknowledged Event by Host" }, 96 { CAM_MESSAGE_RECV, "Message Received in Host Target Mode" }, 97 { CAM_INVALID_CDB, "Invalid CDB received in Host Target Mode" }, 98 { CAM_LUN_INVALID, "Invalid Lun" }, 99 { CAM_TID_INVALID, "Invalid Target ID" }, 100 { CAM_FUNC_NOTAVAIL, "Function Not Available" }, 101 { CAM_NO_NEXUS, "Nexus Not Established" }, 102 { CAM_IID_INVALID, "Invalid Initiator ID" }, 103 { CAM_CDB_RECVD, "CDB Received" }, 104 { CAM_LUN_ALRDY_ENA, "LUN Already Enabled for Target Mode" }, 105 { CAM_SCSI_BUSY, "SCSI Bus Busy" }, 106 }; 107 108 const int num_cam_status_entries = 109 sizeof(cam_status_table)/sizeof(*cam_status_table); 110 111 #ifdef _KERNEL 112 SYSCTL_NODE(_kern, OID_AUTO, cam, CTLFLAG_RD, 0, "CAM Subsystem"); 113 114 #ifndef CAM_DEFAULT_SORT_IO_QUEUES 115 #define CAM_DEFAULT_SORT_IO_QUEUES 1 116 #endif 117 118 int cam_sort_io_queues = CAM_DEFAULT_SORT_IO_QUEUES; 119 TUNABLE_INT("kern.cam.sort_io_queues", &cam_sort_io_queues); 120 SYSCTL_INT(_kern_cam, OID_AUTO, sort_io_queues, CTLFLAG_RWTUN, 121 &cam_sort_io_queues, 0, "Sort IO queues to try and optimise disk access patterns"); 122 #endif 123 124 void 125 cam_strvis(u_int8_t *dst, const u_int8_t *src, int srclen, int dstlen) 126 { 127 128 /* Trim leading/trailing spaces, nulls. */ 129 while (srclen > 0 && src[0] == ' ') 130 src++, srclen--; 131 while (srclen > 0 132 && (src[srclen-1] == ' ' || src[srclen-1] == '\0')) 133 srclen--; 134 135 while (srclen > 0 && dstlen > 1) { 136 u_int8_t *cur_pos = dst; 137 138 if (*src < 0x20 || *src >= 0x80) { 139 /* SCSI-II Specifies that these should never occur. */ 140 /* non-printable character */ 141 if (dstlen > 4) { 142 *cur_pos++ = '\\'; 143 *cur_pos++ = ((*src & 0300) >> 6) + ''; 144 *cur_pos++ = ((*src & 0070) >> 3) + ''; 145 *cur_pos++ = ((*src & 0007) >> 0) + ''; 146 } else { 147 *cur_pos++ = '?'; 148 } 149 } else { 150 /* normal character */ 151 *cur_pos++ = *src; 152 } 153 src++; 154 srclen--; 155 dstlen -= cur_pos - dst; 156 dst = cur_pos; 157 } 158 *dst = '\0'; 159 } 160 161 /* 162 * Compare string with pattern, returning 0 on match. 163 * Short pattern matches trailing blanks in name, 164 * wildcard '*' in pattern matches rest of name, 165 * wildcard '?' matches a single non-space character. 166 */ 167 int 168 cam_strmatch(const u_int8_t *str, const u_int8_t *pattern, int str_len) 169 { 170 171 while (*pattern != '\0'&& str_len > 0) { 172 173 if (*pattern == '*') { 174 return (0); 175 } 176 if ((*pattern != *str) 177 && (*pattern != '?' || *str == ' ')) { 178 return (1); 179 } 180 pattern++; 181 str++; 182 str_len--; 183 } 184 while (str_len > 0 && *str == ' ') { 185 str++; 186 str_len--; 187 } 188 if (str_len > 0 && *str == 0) 189 str_len = 0; 190 191 return (str_len); 192 } 193 194 caddr_t 195 cam_quirkmatch(caddr_t target, caddr_t quirk_table, int num_entries, 196 int entry_size, cam_quirkmatch_t *comp_func) 197 { 198 for (; num_entries > 0; num_entries--, quirk_table += entry_size) { 199 if ((*comp_func)(target, quirk_table) == 0) 200 return (quirk_table); 201 } 202 return (NULL); 203 } 204 205 const struct cam_status_entry* 206 cam_fetch_status_entry(cam_status status) 207 { 208 status &= CAM_STATUS_MASK; 209 return (bsearch(&status, &cam_status_table, 210 num_cam_status_entries, 211 sizeof(*cam_status_table), 212 camstatusentrycomp)); 213 } 214 215 static int 216 camstatusentrycomp(const void *key, const void *member) 217 { 218 cam_status status; 219 const struct cam_status_entry *table_entry; 220 221 status = *(const cam_status *)key; 222 table_entry = (const struct cam_status_entry *)member; 223 224 return (status - table_entry->status_code); 225 } 226 227 228 #ifdef _KERNEL 229 char * 230 cam_error_string(union ccb *ccb, char *str, int str_len, 231 cam_error_string_flags flags, 232 cam_error_proto_flags proto_flags) 233 #else /* !_KERNEL */ 234 char * 235 cam_error_string(struct cam_device *device, union ccb *ccb, char *str, 236 int str_len, cam_error_string_flags flags, 237 cam_error_proto_flags proto_flags) 238 #endif /* _KERNEL/!_KERNEL */ 239 { 240 char path_str[64]; 241 struct sbuf sb; 242 243 if ((ccb == NULL) 244 || (str == NULL) 245 || (str_len <= 0)) 246 return(NULL); 247 248 if (flags == CAM_ESF_NONE) 249 return(NULL); 250 251 switch (ccb->ccb_h.func_code) { 252 case XPT_ATA_IO: 253 switch (proto_flags & CAM_EPF_LEVEL_MASK) { 254 case CAM_EPF_NONE: 255 break; 256 case CAM_EPF_ALL: 257 case CAM_EPF_NORMAL: 258 proto_flags |= CAM_EAF_PRINT_RESULT; 259 /* FALLTHROUGH */ 260 case CAM_EPF_MINIMAL: 261 proto_flags |= CAM_EAF_PRINT_STATUS; 262 /* FALLTHROUGH */ 263 default: 264 break; 265 } 266 break; 267 case XPT_SCSI_IO: 268 switch (proto_flags & CAM_EPF_LEVEL_MASK) { 269 case CAM_EPF_NONE: 270 break; 271 case CAM_EPF_ALL: 272 case CAM_EPF_NORMAL: 273 proto_flags |= CAM_ESF_PRINT_SENSE; 274 /* FALLTHROUGH */ 275 case CAM_EPF_MINIMAL: 276 proto_flags |= CAM_ESF_PRINT_STATUS; 277 /* FALLTHROUGH */ 278 default: 279 break; 280 } 281 break; 282 case XPT_SMP_IO: 283 switch (proto_flags & CAM_EPF_LEVEL_MASK) { 284 case CAM_EPF_NONE: 285 break; 286 case CAM_EPF_ALL: 287 proto_flags |= CAM_ESMF_PRINT_FULL_CMD; 288 /* FALLTHROUGH */ 289 case CAM_EPF_NORMAL: 290 case CAM_EPF_MINIMAL: 291 proto_flags |= CAM_ESMF_PRINT_STATUS; 292 /* FALLTHROUGH */ 293 default: 294 break; 295 } 296 break; 297 default: 298 break; 299 } 300 #ifdef _KERNEL 301 xpt_path_string(ccb->csio.ccb_h.path, path_str, sizeof(path_str)); 302 #else /* !_KERNEL */ 303 cam_path_string(device, path_str, sizeof(path_str)); 304 #endif /* _KERNEL/!_KERNEL */ 305 306 sbuf_new(&sb, str, str_len, 0); 307 308 if (flags & CAM_ESF_COMMAND) { 309 sbuf_cat(&sb, path_str); 310 switch (ccb->ccb_h.func_code) { 311 case XPT_ATA_IO: 312 ata_command_sbuf(&ccb->ataio, &sb); 313 sbuf_printf(&sb, "\n"); 314 break; 315 case XPT_SCSI_IO: 316 #ifdef _KERNEL 317 scsi_command_string(&ccb->csio, &sb); 318 #else /* !_KERNEL */ 319 scsi_command_string(device, &ccb->csio, &sb); 320 #endif /* _KERNEL/!_KERNEL */ 321 sbuf_printf(&sb, "\n"); 322 break; 323 case XPT_SMP_IO: 324 smp_command_sbuf(&ccb->smpio, &sb, path_str, 79 - 325 strlen(path_str), (proto_flags & 326 CAM_ESMF_PRINT_FULL_CMD) ? 79 : 0); 327 sbuf_printf(&sb, "\n"); 328 break; 329 default: 330 break; 331 } 332 } 333 334 if (flags & CAM_ESF_CAM_STATUS) { 335 cam_status status; 336 const struct cam_status_entry *entry; 337 338 sbuf_cat(&sb, path_str); 339 340 status = ccb->ccb_h.status & CAM_STATUS_MASK; 341 342 entry = cam_fetch_status_entry(status); 343 344 if (entry == NULL) 345 sbuf_printf(&sb, "CAM status: Unknown (%#x)\n", 346 ccb->ccb_h.status); 347 else 348 sbuf_printf(&sb, "CAM status: %s\n", 349 entry->status_text); 350 } 351 352 if (flags & CAM_ESF_PROTO_STATUS) { 353 354 switch (ccb->ccb_h.func_code) { 355 case XPT_ATA_IO: 356 if ((ccb->ccb_h.status & CAM_STATUS_MASK) != 357 CAM_ATA_STATUS_ERROR) 358 break; 359 if (proto_flags & CAM_EAF_PRINT_STATUS) { 360 sbuf_cat(&sb, path_str); 361 ata_status_sbuf(&ccb->ataio, &sb); 362 sbuf_printf(&sb, "\n"); 363 } 364 if (proto_flags & CAM_EAF_PRINT_RESULT) { 365 sbuf_cat(&sb, path_str); 366 ata_res_sbuf(&ccb->ataio, &sb); 367 sbuf_printf(&sb, "\n"); 368 } 369 370 break; 371 case XPT_SCSI_IO: 372 if ((ccb->ccb_h.status & CAM_STATUS_MASK) != 373 CAM_SCSI_STATUS_ERROR) 374 break; 375 376 if (proto_flags & CAM_ESF_PRINT_STATUS) { 377 sbuf_cat(&sb, path_str); 378 sbuf_printf(&sb, "SCSI status: %s\n", 379 scsi_status_string(&ccb->csio)); 380 } 381 382 if ((proto_flags & CAM_ESF_PRINT_SENSE) 383 && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND) 384 && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)) { 385 386 #ifdef _KERNEL 387 scsi_sense_sbuf(&ccb->csio, &sb, 388 SSS_FLAG_NONE); 389 #else /* !_KERNEL */ 390 scsi_sense_sbuf(device, &ccb->csio, &sb, 391 SSS_FLAG_NONE); 392 #endif /* _KERNEL/!_KERNEL */ 393 } 394 break; 395 case XPT_SMP_IO: 396 if ((ccb->ccb_h.status & CAM_STATUS_MASK) != 397 CAM_SMP_STATUS_ERROR) 398 break; 399 400 if (proto_flags & CAM_ESF_PRINT_STATUS) { 401 sbuf_cat(&sb, path_str); 402 sbuf_printf(&sb, "SMP status: %s (%#x)\n", 403 smp_error_desc(ccb->smpio.smp_response[2]), 404 ccb->smpio.smp_response[2]); 405 } 406 /* There is no SMP equivalent to SCSI sense. */ 407 break; 408 default: 409 break; 410 } 411 } 412 413 sbuf_finish(&sb); 414 415 return(sbuf_data(&sb)); 416 } 417 418 #ifdef _KERNEL 419 420 void 421 cam_error_print(union ccb *ccb, cam_error_string_flags flags, 422 cam_error_proto_flags proto_flags) 423 { 424 char str[512]; 425 426 printf("%s", cam_error_string(ccb, str, sizeof(str), flags, 427 proto_flags)); 428 } 429 430 #else /* !_KERNEL */ 431 432 void 433 cam_error_print(struct cam_device *device, union ccb *ccb, 434 cam_error_string_flags flags, cam_error_proto_flags proto_flags, 435 FILE *ofile) 436 { 437 char str[512]; 438 439 if ((device == NULL) || (ccb == NULL) || (ofile == NULL)) 440 return; 441 442 fprintf(ofile, "%s", cam_error_string(device, ccb, str, sizeof(str), 443 flags, proto_flags)); 444 } 445 446 #endif /* _KERNEL/!_KERNEL */ 447 448 /* 449 * Common calculate geometry fuction 450 * 451 * Caller should set ccg->volume_size and block_size. 452 * The extended parameter should be zero if extended translation 453 * should not be used. 454 */ 455 void 456 cam_calc_geometry(struct ccb_calc_geometry *ccg, int extended) 457 { 458 uint32_t size_mb, secs_per_cylinder; 459 460 if (ccg->block_size == 0) { 461 ccg->ccb_h.status = CAM_REQ_CMP_ERR; 462 return; 463 } 464 size_mb = (1024L * 1024L) / ccg->block_size; 465 if (size_mb == 0) { 466 ccg->ccb_h.status = CAM_REQ_CMP_ERR; 467 return; 468 } 469 size_mb = ccg->volume_size / size_mb; 470 if (size_mb > 1024 && extended) { 471 ccg->heads = 255; 472 ccg->secs_per_track = 63; 473 } else { 474 ccg->heads = 64; 475 ccg->secs_per_track = 32; 476 } 477 secs_per_cylinder = ccg->heads * ccg->secs_per_track; 478 if (secs_per_cylinder == 0) { 479 ccg->ccb_h.status = CAM_REQ_CMP_ERR; 480 return; 481 } 482 ccg->cylinders = ccg->volume_size / secs_per_cylinder; 483 ccg->ccb_h.status = CAM_REQ_CMP; 484 }
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