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  * $DragonFly: src/sys/bus/cam/cam.c,v 1.7 2007/11/18 17:53:01 pavalos Exp $
  30  */
  31 #include <sys/param.h>
  32 #ifdef _KERNEL
  33 #include <sys/systm.h>
  34 #include <sys/kernel.h>
  35 #include <sys/sysctl.h>
  36 #else
  37 #include <stdlib.h>
  38 #include <stdio.h>
  39 #endif
  40
  41 #include "cam.h"
  42 #include "cam_ccb.h"
  43 #include "scsi/scsi_all.h"
  44 #include <sys/sbuf.h>
  45
  46 #ifdef _KERNEL
  47 #include <sys/libkern.h>
  48 #include "cam_xpt.h"
  49 #endif
  50
  51 static int      camstatusentrycomp(const void *key, const void *member);
  52
  53 const struct cam_status_entry cam_status_table[] = {
  54         { CAM_REQ_INPROG,        "CCB request is in progress"                },
  55         { CAM_REQ_CMP,           "CCB request completed without error"       },
  56         { CAM_REQ_ABORTED,       "CCB request aborted by the host"           },
  57         { CAM_UA_ABORT,          "Unable to abort CCB request"               },
  58         { CAM_REQ_CMP_ERR,       "CCB request completed with an error"       },
  59         { CAM_BUSY,              "CAM subsytem is busy"                      },
  60         { CAM_REQ_INVALID,       "CCB request was invalid"                   },
  61         { CAM_PATH_INVALID,      "Supplied Path ID is invalid"               },
  62         { CAM_DEV_NOT_THERE,     "Device Not Present"                        },
  63         { CAM_UA_TERMIO,         "Unable to terminate I/O CCB request"       },
  64         { CAM_SEL_TIMEOUT,       "Selection Timeout"                         },
  65         { CAM_CMD_TIMEOUT,       "Command timeout"                           },
  66         { CAM_SCSI_STATUS_ERROR, "SCSI Status Error"                         },
  67         { CAM_MSG_REJECT_REC,    "Message Reject Reveived"                   },
  68         { CAM_SCSI_BUS_RESET,    "SCSI Bus Reset Sent/Received"              },
  69         { CAM_UNCOR_PARITY,      "Uncorrectable parity/CRC error"            },
  70         { CAM_AUTOSENSE_FAIL,    "Auto-Sense Retrieval Failed"               },
  71         { CAM_NO_HBA,            "No HBA Detected"                           },
  72         { CAM_DATA_RUN_ERR,      "Data Overrun error"                        },
  73         { CAM_UNEXP_BUSFREE,     "Unexpected Bus Free"                       },
  74         { CAM_SEQUENCE_FAIL,     "Target Bus Phase Sequence Failure"         },
  75         { CAM_CCB_LEN_ERR,       "CCB length supplied is inadequate"         },
  76         { CAM_PROVIDE_FAIL,      "Unable to provide requested capability"    },
  77         { CAM_BDR_SENT,          "SCSI BDR Message Sent"                     },
  78         { CAM_REQ_TERMIO,        "CCB request terminated by the host"        },
  79         { CAM_UNREC_HBA_ERROR,   "Unrecoverable Host Bus Adapter Error"      },
  80         { CAM_REQ_TOO_BIG,       "The request was too large for this host"   },
  81         { CAM_REQUEUE_REQ,       "Unconditionally Re-queue Request",         },
  82         { CAM_IDE,               "Initiator Detected Error Message Received" },
  83         { CAM_RESRC_UNAVAIL,     "Resource Unavailable"                      },
  84         { CAM_UNACKED_EVENT,     "Unacknowledged Event by Host"              },
  85         { CAM_MESSAGE_RECV,      "Message Received in Host Target Mode"      },
  86         { CAM_INVALID_CDB,       "Invalid CDB received in Host Target Mode"  },
  87         { CAM_LUN_INVALID,       "Invalid Lun"                               },
  88         { CAM_TID_INVALID,       "Invalid Target ID"                         },
  89         { CAM_FUNC_NOTAVAIL,     "Function Not Available"                    },
  90         { CAM_NO_NEXUS,          "Nexus Not Established"                     },
  91         { CAM_IID_INVALID,       "Invalid Initiator ID"                      },
  92         { CAM_CDB_RECVD,         "CDB Received"                              },
  93         { CAM_LUN_ALRDY_ENA,     "LUN Already Enabled for Target Mode"       },
  94         { CAM_SCSI_BUSY,         "SCSI Bus Busy"                             },
  95 };
  96
  97 const int num_cam_status_entries =
  98     sizeof(cam_status_table)/sizeof(*cam_status_table);
  99
 100 #ifdef _KERNEL
 101 SYSCTL_NODE(_kern, OID_AUTO, cam, CTLFLAG_RD, 0, "CAM Subsystem");
 102 #endif
 103
 104 void
 105 cam_strvis(u_int8_t *dst, const u_int8_t *src, int srclen, int dstlen)
 106 {
 107
 108         /* Trim leading/trailing spaces, nulls. */
 109         while (srclen > 0 && src[0] == ' ')
 110                 src++, srclen--;
 111         while (srclen > 0
 112             && (src[srclen-1] == ' ' || src[srclen-1] == '\0'))
 113                 srclen--;
 114
 115         while (srclen > 0 && dstlen > 1) {
 116                 u_int8_t *cur_pos = dst;
 117
 118                 if (*src < 0x20 || *src >= 0x80) {
 119                         /* SCSI-II Specifies that these should never occur. */
 120                         /* non-printable character */
 121                         if (dstlen > 4) {
 122                                 *cur_pos++ = '\\';
 123                                 *cur_pos++ = ((*src & 0300) >> 6) + '0';
 124                                 *cur_pos++ = ((*src & 0070) >> 3) + '0';
 125                                 *cur_pos++ = ((*src & 0007) >> 0) + '0';
 126                         } else {
 127                                 *cur_pos++ = '?';
 128                         }
 129                 } else {
 130                         /* normal character */
 131                         *cur_pos++ = *src;
 132                 }
 133                 src++;
 134                 srclen--;
 135                 dstlen -= cur_pos - dst;
 136                 dst = cur_pos;
 137         }
 138         *dst = '\0';
 139 }
 140
 141 /*
 142  * Compare string with pattern, returning 0 on match.
 143  * Short pattern matches trailing blanks in name,
 144  * wildcard '*' in pattern matches rest of name,
 145  * wildcard '?' matches a single non-space character.
 146  */
 147 int
 148 cam_strmatch(const u_int8_t *str, const u_int8_t *pattern, int str_len)
 149 {
 150
 151         while (*pattern != '\0'&& str_len > 0) {
 152
 153                 if (*pattern == '*') {
 154                         return (0);
 155                 }
 156                 if ((*pattern != *str)
 157                  && (*pattern != '?' || *str == ' ')) {
 158                         return (1);
 159                 }
 160                 pattern++;
 161                 str++;
 162                 str_len--;
 163         }
 164         while (str_len > 0 && *str++ == ' ')
 165                 str_len--;
 166
 167         return (str_len);
 168 }
 169
 170 caddr_t
 171 cam_quirkmatch(caddr_t target, caddr_t quirk_table, int num_entries,
 172                int entry_size, cam_quirkmatch_t *comp_func)
 173 {
 174         for (; num_entries > 0; num_entries--, quirk_table += entry_size) {
 175                 if ((*comp_func)(target, quirk_table) == 0)
 176                         return (quirk_table);
 177         }
 178         return (NULL);
 179 }
 180
 181 const struct cam_status_entry*
 182 cam_fetch_status_entry(cam_status status)
 183 {
 184         status &= CAM_STATUS_MASK;
 185         return (bsearch(&status, &cam_status_table,
 186                         num_cam_status_entries,
 187                         sizeof(*cam_status_table),
 188                         camstatusentrycomp));
 189 }
 190
 191 static int
 192 camstatusentrycomp(const void *key, const void *member)
 193 {
 194         cam_status status;
 195         const struct cam_status_entry *table_entry;
 196
 197         status = *(const cam_status *)key;
 198         table_entry = (const struct cam_status_entry *)member;
 199
 200         return (status - table_entry->status_code);
 201 }
 202
 203
 204 #ifdef _KERNEL
 205 char *
 206 cam_error_string(union ccb *ccb, char *str, int str_len,
 207                  cam_error_string_flags flags,
 208                  cam_error_proto_flags proto_flags)
 209 #else /* !_KERNEL */
 210 char *
 211 cam_error_string(struct cam_device *device, union ccb *ccb, char *str,
 212                  int str_len, cam_error_string_flags flags,
 213                  cam_error_proto_flags proto_flags)
 214 #endif /* _KERNEL/!_KERNEL */
 215 {
 216         char path_str[64];
 217         struct sbuf sb;
 218
 219         if ((ccb == NULL)
 220          || (str == NULL)
 221          || (str_len <= 0))
 222                 return(NULL);
 223
 224         if (flags == CAM_ESF_NONE)
 225                 return(NULL);
 226
 227         switch (ccb->ccb_h.func_code) {
 228                 case XPT_SCSI_IO:
 229                         switch (proto_flags & CAM_EPF_LEVEL_MASK) {
 230                         case CAM_EPF_NONE:
 231                                 break;
 232                         case CAM_EPF_ALL:
 233                         case CAM_EPF_NORMAL:
 234                                 proto_flags |= CAM_ESF_PRINT_SENSE;
 235                                 /* FALLTHROUGH */
 236                         case CAM_EPF_MINIMAL:
 237                                 proto_flags |= CAM_ESF_PRINT_STATUS;
 238                         default:
 239                                 break;
 240                         }
 241                         break;
 242                 default:
 243                         break;
 244         }
 245 #ifdef _KERNEL
 246         xpt_path_string(ccb->csio.ccb_h.path, path_str, sizeof(path_str));
 247 #else /* !_KERNEL */
 248         cam_path_string(device, path_str, sizeof(path_str));
 249 #endif /* _KERNEL/!_KERNEL */
 250
 251         sbuf_new(&sb, str, str_len, 0);
 252
 253         if (flags & CAM_ESF_COMMAND) {
 254
 255                 sbuf_cat(&sb, path_str);
 256
 257                 switch (ccb->ccb_h.func_code) {
 258                 case XPT_SCSI_IO:
 259 #ifdef _KERNEL
 260                         scsi_command_string(&ccb->csio, &sb);
 261 #else /* !_KERNEL */
 262                         scsi_command_string(device, &ccb->csio, &sb);
 263 #endif /* _KERNEL/!_KERNEL */
 264                         sbuf_printf(&sb, "\n");
 265
 266                         break;
 267                 default:
 268                         break;
 269                 }
 270         }
 271
 272         if (flags & CAM_ESF_CAM_STATUS) {
 273                 cam_status status;
 274                 const struct cam_status_entry *entry;
 275
 276                 sbuf_cat(&sb, path_str);
 277
 278                 status = ccb->ccb_h.status & CAM_STATUS_MASK;
 279
 280                 entry = cam_fetch_status_entry(status);
 281
 282                 if (entry == NULL)
 283                         sbuf_printf(&sb, "CAM Status: Unknown (%#x)\n",
 284                                     ccb->ccb_h.status);
 285                 else
 286                         sbuf_printf(&sb, "CAM Status: %s\n",
 287                                     entry->status_text);
 288         }
 289
 290         if (flags & CAM_ESF_PROTO_STATUS) {
 291
 292                 switch (ccb->ccb_h.func_code) {
 293                 case XPT_SCSI_IO:
 294                         if ((ccb->ccb_h.status & CAM_STATUS_MASK) !=
 295                              CAM_SCSI_STATUS_ERROR)
 296                                 break;
 297
 298                         if (proto_flags & CAM_ESF_PRINT_STATUS) {
 299                                 sbuf_cat(&sb, path_str);
 300                                 /*
 301                                  * Print out the SCSI status byte as long as
 302                                  * the user wants some protocol output.
 303                                  */
 304                                 sbuf_printf(&sb, "SCSI Status: %s\n",
 305                                             scsi_status_string(&ccb->csio));
 306                         }
 307
 308                         if ((proto_flags & CAM_ESF_PRINT_SENSE)
 309                          && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
 310                          && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)) {
 311
 312 #ifdef _KERNEL
 313                                 scsi_sense_sbuf(&ccb->csio, &sb,
 314                                                 SSS_FLAG_NONE);
 315 #else /* !_KERNEL */
 316                                 scsi_sense_sbuf(device, &ccb->csio, &sb,
 317                                                 SSS_FLAG_NONE);
 318 #endif /* _KERNEL/!_KERNEL */
 319                         }
 320                         break;
 321                 default:
 322                         break;
 323                 }
 324         }
 325
 326         sbuf_finish(&sb);
 327
 328         return(sbuf_data(&sb));
 329 }
 330
 331 #ifdef _KERNEL
 332
 333 void
 334 cam_error_print(union ccb *ccb, cam_error_string_flags flags,
 335                 cam_error_proto_flags proto_flags)
 336 {
 337         char str[512];
 338
 339         kprintf("%s", cam_error_string(ccb, str, sizeof(str), flags,
 340                proto_flags));
 341 }
 342
 343 #else /* !_KERNEL */
 344
 345 void
 346 cam_error_print(struct cam_device *device, union ccb *ccb,
 347                 cam_error_string_flags flags, cam_error_proto_flags proto_flags,
 348                 FILE *ofile)
 349 {
 350         char str[512];
 351
 352         if ((device == NULL) || (ccb == NULL) || (ofile == NULL))
 353                 return;
 354
 355         fprintf(ofile, "%s", cam_error_string(device, ccb, str, sizeof(str),
 356                 flags, proto_flags));
 357 }
 358
 359 #endif /* _KERNEL/!_KERNEL */
 360
 361 /*
 362  * Common calculate geometry fuction
 363  *
 364  * Caller should set ccg->volume_size and block_size.
 365  * The extended parameter should be zero if extended translation
 366  * should not be used.
 367  */
 368 void
 369 cam_calc_geometry(struct ccb_calc_geometry *ccg, int extended)
 370 {
 371         uint32_t size_mb, secs_per_cylinder;
 372
 373         size_mb = ccg->volume_size / ((1024L * 1024L) / ccg->block_size);
 374         if (size_mb > 1024 && extended) {
 375                 ccg->heads = 255;
 376                 ccg->secs_per_track = 63;
 377         } else {
 378                 ccg->heads = 64;
 379                 ccg->secs_per_track = 32;
 380         }
 381         secs_per_cylinder = ccg->heads * ccg->secs_per_track;
 382         ccg->cylinders = ccg->volume_size / secs_per_cylinder;
 383         ccg->ccb_h.status = CAM_REQ_CMP;
 384 }
 385