sys/bus/cam/cam.c

   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  * $FreeBSD: src/sys/cam/cam.c,v 1.4 2001/03/27 05:45:09 ken Exp $
  29  */
  30 #include <sys/param.h>
  31
  32 #ifdef _KERNEL
  33
  34 #include <sys/systm.h>
  35 #include <sys/kernel.h>
  36 #include <sys/sysctl.h>
  37
  38 #else
  39
  40 #include <stdlib.h>
  41 #include <stdio.h>
  42 #include <camlib.h>
  43
  44 #define kbsearch        bsearch
  45
  46 #endif
  47
  48 #include "cam.h"
  49 #include "cam_ccb.h"
  50 #include "scsi/scsi_all.h"
  51 #include <sys/sbuf.h>
  52
  53 #ifdef _KERNEL
  54 #include <sys/libkern.h>
  55 #include "cam_xpt.h"
  56 #endif
  57
  58 static int      camstatusentrycomp(const void *key, const void *member);
  59
  60 const struct cam_status_entry cam_status_table[] = {
  61         { CAM_REQ_INPROG,        "CCB request is in progress"                },
  62         { CAM_REQ_CMP,           "CCB request completed without error"       },
  63         { CAM_REQ_ABORTED,       "CCB request aborted by the host"           },
  64         { CAM_UA_ABORT,          "Unable to abort CCB request"               },
  65         { CAM_REQ_CMP_ERR,       "CCB request completed with an error"       },
  66         { CAM_BUSY,              "CAM subsystem is busy"                     },
  67         { CAM_REQ_INVALID,       "CCB request was invalid"                   },
  68         { CAM_PATH_INVALID,      "Supplied Path ID is invalid"               },
  69         { CAM_DEV_NOT_THERE,     "Device Not Present"                        },
  70         { CAM_UA_TERMIO,         "Unable to terminate I/O CCB request"       },
  71         { CAM_SEL_TIMEOUT,       "Selection Timeout"                         },
  72         { CAM_CMD_TIMEOUT,       "Command timeout"                           },
  73         { CAM_SCSI_STATUS_ERROR, "SCSI Status Error"                         },
  74         { CAM_MSG_REJECT_REC,    "Message Reject Reveived"                   },
  75         { CAM_SCSI_BUS_RESET,    "SCSI Bus Reset Sent/Received"              },
  76         { CAM_UNCOR_PARITY,      "Uncorrectable parity/CRC error"            },
  77         { CAM_AUTOSENSE_FAIL,    "Auto-Sense Retrieval Failed"               },
  78         { CAM_NO_HBA,            "No HBA Detected"                           },
  79         { CAM_DATA_RUN_ERR,      "Data Overrun error"                        },
  80         { CAM_UNEXP_BUSFREE,     "Unexpected Bus Free"                       },
  81         { CAM_SEQUENCE_FAIL,     "Target Bus Phase Sequence Failure"         },
  82         { CAM_CCB_LEN_ERR,       "CCB length supplied is inadequate"         },
  83         { CAM_PROVIDE_FAIL,      "Unable to provide requested capability"    },
  84         { CAM_BDR_SENT,          "SCSI BDR Message Sent"                     },
  85         { CAM_REQ_TERMIO,        "CCB request terminated by the host"        },
  86         { CAM_UNREC_HBA_ERROR,   "Unrecoverable Host Bus Adapter Error"      },
  87         { CAM_REQ_TOO_BIG,       "The request was too large for this host"   },
  88         { CAM_REQUEUE_REQ,       "Unconditionally Re-queue Request",         },
  89         { CAM_IDE,               "Initiator Detected Error Message Received" },
  90         { CAM_RESRC_UNAVAIL,     "Resource Unavailable"                      },
  91         { CAM_UNACKED_EVENT,     "Unacknowledged Event by Host"              },
  92         { CAM_MESSAGE_RECV,      "Message Received in Host Target Mode"      },
  93         { CAM_INVALID_CDB,       "Invalid CDB received in Host Target Mode"  },
  94         { CAM_LUN_INVALID,       "Invalid Lun"                               },
  95         { CAM_TID_INVALID,       "Invalid Target ID"                         },
  96         { CAM_FUNC_NOTAVAIL,     "Function Not Available"                    },
  97         { CAM_NO_NEXUS,          "Nexus Not Established"                     },
  98         { CAM_IID_INVALID,       "Invalid Initiator ID"                      },
  99         { CAM_CDB_RECVD,         "CDB Received"                              },
 100         { CAM_LUN_ALRDY_ENA,     "LUN Already Enabled for Target Mode"       },
 101         { CAM_SCSI_BUSY,         "SCSI Bus Busy"                             },
 102 };
 103
 104 const int num_cam_status_entries = NELEM(cam_status_table);
 105
 106 #ifdef _KERNEL
 107 SYSCTL_NODE(_kern, OID_AUTO, cam, CTLFLAG_RD, 0, "CAM Subsystem");
 108 #endif
 109
 110 void
 111 cam_strvis(u_int8_t *dst, const u_int8_t *src, int srclen, int dstlen)
 112 {
 113
 114         /* Trim leading/trailing spaces, nulls. */
 115         while (srclen > 0 && src[0] == ' ')
 116                 src++, srclen--;
 117         while (srclen > 0
 118             && (src[srclen-1] == ' ' || src[srclen-1] == '\0'))
 119                 srclen--;
 120
 121         while (srclen > 0 && dstlen > 1) {
 122                 u_int8_t *cur_pos = dst;
 123
 124                 if (*src < 0x20 || *src >= 0x80) {
 125                         /* SCSI-II Specifies that these should never occur. */
 126                         /* non-printable character */
 127                         if (dstlen > 4) {
 128                                 *cur_pos++ = '\\';
 129                                 *cur_pos++ = ((*src & 0300) >> 6) + '0';
 130                                 *cur_pos++ = ((*src & 0070) >> 3) + '0';
 131                                 *cur_pos++ = ((*src & 0007) >> 0) + '0';
 132                         } else {
 133                                 *cur_pos++ = '?';
 134                         }
 135                 } else {
 136                         /* normal character */
 137                         *cur_pos++ = *src;
 138                 }
 139                 src++;
 140                 srclen--;
 141                 dstlen -= cur_pos - dst;
 142                 dst = cur_pos;
 143         }
 144         *dst = '\0';
 145 }
 146
 147 /*
 148  * Compare string with pattern, returning 0 on match.
 149  * Short pattern matches trailing blanks in name,
 150  * wildcard '*' in pattern matches rest of name,
 151  * wildcard '?' matches a single non-space character.
 152  */
 153 int
 154 cam_strmatch(const u_int8_t *str, const u_int8_t *pattern, int str_len)
 155 {
 156
 157         while (*pattern != '\0'&& str_len > 0) {
 158
 159                 if (*pattern == '*') {
 160                         return (0);
 161                 }
 162                 if ((*pattern != *str)
 163                  && (*pattern != '?' || *str == ' ')) {
 164                         return (1);
 165                 }
 166                 pattern++;
 167                 str++;
 168                 str_len--;
 169         }
 170         while (str_len > 0 && *str++ == ' ')
 171                 str_len--;
 172
 173         return (str_len);
 174 }
 175
 176 caddr_t
 177 cam_quirkmatch(caddr_t target, caddr_t quirk_table, int num_entries,
 178                int entry_size, cam_quirkmatch_t *comp_func)
 179 {
 180         for (; num_entries > 0; num_entries--, quirk_table += entry_size) {
 181                 if ((*comp_func)(target, quirk_table) == 0)
 182                         return (quirk_table);
 183         }
 184         return (NULL);
 185 }
 186
 187 const struct cam_status_entry*
 188 cam_fetch_status_entry(cam_status status)
 189 {
 190         status &= CAM_STATUS_MASK;
 191         return (kbsearch(&status, &cam_status_table,
 192                         num_cam_status_entries,
 193                         sizeof(*cam_status_table),
 194                         camstatusentrycomp));
 195 }
 196
 197 static int
 198 camstatusentrycomp(const void *key, const void *member)
 199 {
 200         cam_status status;
 201         const struct cam_status_entry *table_entry;
 202
 203         status = *(const cam_status *)key;
 204         table_entry = (const struct cam_status_entry *)member;
 205
 206         return (status - table_entry->status_code);
 207 }
 208
 209
 210 #ifdef _KERNEL
 211 char *
 212 cam_error_string(union ccb *ccb, char *str, int str_len,
 213                  cam_error_string_flags flags,
 214                  cam_error_proto_flags proto_flags)
 215 #else /* !_KERNEL */
 216 char *
 217 cam_error_string(struct cam_device *device, union ccb *ccb, char *str,
 218                  int str_len, cam_error_string_flags flags,
 219                  cam_error_proto_flags proto_flags)
 220 #endif /* _KERNEL/!_KERNEL */
 221 {
 222         char path_str[64];
 223         struct sbuf sb;
 224
 225         if ((ccb == NULL)
 226          || (str == NULL)
 227          || (str_len <= 0))
 228                 return(NULL);
 229
 230         if (flags == CAM_ESF_NONE)
 231                 return(NULL);
 232
 233         switch (ccb->ccb_h.func_code) {
 234                 case XPT_SCSI_IO:
 235                         switch (proto_flags & CAM_EPF_LEVEL_MASK) {
 236                         case CAM_EPF_NONE:
 237                                 break;
 238                         case CAM_EPF_ALL:
 239                         case CAM_EPF_NORMAL:
 240                                 proto_flags |= CAM_ESF_PRINT_SENSE;
 241                                 /* FALLTHROUGH */
 242                         case CAM_EPF_MINIMAL:
 243                                 proto_flags |= CAM_ESF_PRINT_STATUS;
 244                         default:
 245                                 break;
 246                         }
 247                         break;
 248                 default:
 249                         break;
 250         }
 251 #ifdef _KERNEL
 252         xpt_path_string(ccb->csio.ccb_h.path, path_str, sizeof(path_str));
 253 #else /* !_KERNEL */
 254         cam_path_string(device, path_str, sizeof(path_str));
 255 #endif /* _KERNEL/!_KERNEL */
 256
 257         sbuf_new(&sb, str, str_len, 0);
 258
 259         if (flags & CAM_ESF_COMMAND) {
 260
 261                 sbuf_cat(&sb, path_str);
 262
 263                 switch (ccb->ccb_h.func_code) {
 264                 case XPT_SCSI_IO:
 265 #ifdef _KERNEL
 266                         scsi_command_string(&ccb->csio, &sb);
 267 #else /* !_KERNEL */
 268                         scsi_command_string(device, &ccb->csio, &sb);
 269 #endif /* _KERNEL/!_KERNEL */
 270                         sbuf_printf(&sb, "\n");
 271
 272                         break;
 273                 default:
 274                         break;
 275                 }
 276         }
 277
 278         if (flags & CAM_ESF_CAM_STATUS) {
 279                 cam_status status;
 280                 const struct cam_status_entry *entry;
 281
 282                 sbuf_cat(&sb, path_str);
 283
 284                 status = ccb->ccb_h.status & CAM_STATUS_MASK;
 285
 286                 entry = cam_fetch_status_entry(status);
 287
 288                 if (entry == NULL)
 289                         sbuf_printf(&sb, "CAM Status: Unknown (%#x)\n",
 290                                     ccb->ccb_h.status);
 291                 else
 292                         sbuf_printf(&sb, "CAM Status: %s\n",
 293                                     entry->status_text);
 294         }
 295
 296         if (flags & CAM_ESF_PROTO_STATUS) {
 297
 298                 switch (ccb->ccb_h.func_code) {
 299                 case XPT_SCSI_IO:
 300                         if ((ccb->ccb_h.status & CAM_STATUS_MASK) !=
 301                              CAM_SCSI_STATUS_ERROR)
 302                                 break;
 303
 304                         if (proto_flags & CAM_ESF_PRINT_STATUS) {
 305                                 sbuf_cat(&sb, path_str);
 306                                 /*
 307                                  * Print out the SCSI status byte as long as
 308                                  * the user wants some protocol output.
 309                                  */
 310                                 sbuf_printf(&sb, "SCSI Status: %s\n",
 311                                             scsi_status_string(&ccb->csio));
 312                         }
 313
 314                         if ((proto_flags & CAM_ESF_PRINT_SENSE)
 315                          && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
 316                          && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)) {
 317
 318 #ifdef _KERNEL
 319                                 scsi_sense_sbuf(&ccb->csio, &sb,
 320                                                 SSS_FLAG_NONE);
 321 #else /* !_KERNEL */
 322                                 scsi_sense_sbuf(device, &ccb->csio, &sb,
 323                                                 SSS_FLAG_NONE);
 324 #endif /* _KERNEL/!_KERNEL */
 325                         }
 326                         break;
 327                 default:
 328                         break;
 329                 }
 330         }
 331
 332         sbuf_finish(&sb);
 333
 334         return(sbuf_data(&sb));
 335 }
 336
 337 #ifdef _KERNEL
 338
 339 void
 340 cam_error_print(union ccb *ccb, cam_error_string_flags flags,
 341                 cam_error_proto_flags proto_flags)
 342 {
 343         char str[512];
 344
 345         kprintf("%s", cam_error_string(ccb, str, sizeof(str), flags,
 346                proto_flags));
 347 }
 348
 349 #else /* !_KERNEL */
 350
 351 void
 352 cam_error_print(struct cam_device *device, union ccb *ccb,
 353                 cam_error_string_flags flags, cam_error_proto_flags proto_flags,
 354                 FILE *ofile)
 355 {
 356         char str[512];
 357
 358         if ((device == NULL) || (ccb == NULL) || (ofile == NULL))
 359                 return;
 360
 361         fprintf(ofile, "%s", cam_error_string(device, ccb, str, sizeof(str),
 362                 flags, proto_flags));
 363 }
 364
 365 #endif /* _KERNEL/!_KERNEL */
 366
 367 /*
 368  * Common calculate geometry fuction
 369  *
 370  * Caller should set ccg->volume_size and block_size.
 371  * The extended parameter should be zero if extended translation
 372  * should not be used.
 373  */
 374 void
 375 cam_calc_geometry(struct ccb_calc_geometry *ccg, int extended)
 376 {
 377         uint32_t size_mb, secs_per_cylinder;
 378
 379         if (ccg->block_size == 0) {
 380                 ccg->ccb_h.status = CAM_REQ_CMP_ERR;
 381                 return;
 382         }
 383         size_mb = (1024L * 1024L) / ccg->block_size;
 384         if (size_mb == 0) {
 385                 ccg->ccb_h.status = CAM_REQ_CMP_ERR;
 386                 return;
 387         }
 388         size_mb = ccg->volume_size / size_mb;
 389         if (size_mb > 1024 && extended) {
 390                 ccg->heads = 255;
 391                 ccg->secs_per_track = 63;
 392         } else {
 393                 ccg->heads = 64;
 394                 ccg->secs_per_track = 32;
 395         }
 396         secs_per_cylinder = ccg->heads * ccg->secs_per_track;
 397         ccg->cylinders = ccg->volume_size / secs_per_cylinder;
 398         ccg->ccb_h.status = CAM_REQ_CMP;
 399 }
 400