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[FreeBSD/releng/7.2.git] / sys / 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
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
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 #endif /* _KERNEL */
41
42 #include <cam/cam.h>
43 #include <cam/cam_ccb.h>
44 #include <cam/scsi/scsi_all.h>
45 #include <sys/sbuf.h>
46
47 #ifdef _KERNEL
48 #include <sys/libkern.h>
49 #include <cam/cam_xpt.h>
50 #endif
51
52 static int      camstatusentrycomp(const void *key, const void *member);
53
54 const struct cam_status_entry cam_status_table[] = {
55         { CAM_REQ_INPROG,        "CCB request is in progress"                },
56         { CAM_REQ_CMP,           "CCB request completed without error"       },
57         { CAM_REQ_ABORTED,       "CCB request aborted by the host"           },
58         { CAM_UA_ABORT,          "Unable to abort CCB request"               },
59         { CAM_REQ_CMP_ERR,       "CCB request completed with an error"       },
60         { CAM_BUSY,              "CAM subsytem is busy"                      },
61         { CAM_REQ_INVALID,       "CCB request was invalid"                   },
62         { CAM_PATH_INVALID,      "Supplied Path ID is invalid"               },
63         { CAM_DEV_NOT_THERE,     "Device Not Present"                        },
64         { CAM_UA_TERMIO,         "Unable to terminate I/O CCB request"       },
65         { CAM_SEL_TIMEOUT,       "Selection Timeout"                         },
66         { CAM_CMD_TIMEOUT,       "Command timeout"                           },
67         { CAM_SCSI_STATUS_ERROR, "SCSI Status Error"                         },
68         { CAM_MSG_REJECT_REC,    "Message Reject Reveived"                   },
69         { CAM_SCSI_BUS_RESET,    "SCSI Bus Reset Sent/Received"              },
70         { CAM_UNCOR_PARITY,      "Uncorrectable parity/CRC error"            },
71         { CAM_AUTOSENSE_FAIL,    "Auto-Sense Retrieval Failed"               },
72         { CAM_NO_HBA,            "No HBA Detected"                           },
73         { CAM_DATA_RUN_ERR,      "Data Overrun error"                        },
74         { CAM_UNEXP_BUSFREE,     "Unexpected Bus Free"                       },
75         { CAM_SEQUENCE_FAIL,     "Target Bus Phase Sequence Failure"         },
76         { CAM_CCB_LEN_ERR,       "CCB length supplied is inadequate"         },
77         { CAM_PROVIDE_FAIL,      "Unable to provide requested capability"    },
78         { CAM_BDR_SENT,          "SCSI BDR Message Sent"                     },
79         { CAM_REQ_TERMIO,        "CCB request terminated by the host"        },
80         { CAM_UNREC_HBA_ERROR,   "Unrecoverable Host Bus Adapter Error"      },
81         { CAM_REQ_TOO_BIG,       "The request was too large for this host"   },
82         { CAM_REQUEUE_REQ,       "Unconditionally Re-queue Request",         },
83         { CAM_IDE,               "Initiator Detected Error Message Received" },
84         { CAM_RESRC_UNAVAIL,     "Resource Unavailable"                      },
85         { CAM_UNACKED_EVENT,     "Unacknowledged Event by Host"              },
86         { CAM_MESSAGE_RECV,      "Message Received in Host Target Mode"      },
87         { CAM_INVALID_CDB,       "Invalid CDB received in Host Target Mode"  },
88         { CAM_LUN_INVALID,       "Invalid Lun"                               },
89         { CAM_TID_INVALID,       "Invalid Target ID"                         },
90         { CAM_FUNC_NOTAVAIL,     "Function Not Available"                    },
91         { CAM_NO_NEXUS,          "Nexus Not Established"                     },
92         { CAM_IID_INVALID,       "Invalid Initiator ID"                      },
93         { CAM_CDB_RECVD,         "CDB Received"                              },
94         { CAM_LUN_ALRDY_ENA,     "LUN Already Enabled for Target Mode"       },
95         { CAM_SCSI_BUSY,         "SCSI Bus Busy"                             },
96 };
97
98 const int num_cam_status_entries =
99     sizeof(cam_status_table)/sizeof(*cam_status_table);
100
101 #ifdef _KERNEL
102 SYSCTL_NODE(_kern, OID_AUTO, cam, CTLFLAG_RD, 0, "CAM Subsystem");
103 #endif
104
105 void
106 cam_strvis(u_int8_t *dst, const u_int8_t *src, int srclen, int dstlen)
107 {
108
109         /* Trim leading/trailing spaces, nulls. */
110         while (srclen > 0 && src[0] == ' ')
111                 src++, srclen--;
112         while (srclen > 0
113             && (src[srclen-1] == ' ' || src[srclen-1] == '\0'))
114                 srclen--;
115
116         while (srclen > 0 && dstlen > 1) {
117                 u_int8_t *cur_pos = dst;
118
119                 if (*src < 0x20 || *src >= 0x80) {
120                         /* SCSI-II Specifies that these should never occur. */
121                         /* non-printable character */
122                         if (dstlen > 4) {
123                                 *cur_pos++ = '\\';
124                                 *cur_pos++ = ((*src & 0300) >> 6) + '0';
125                                 *cur_pos++ = ((*src & 0070) >> 3) + '0';
126                                 *cur_pos++ = ((*src & 0007) >> 0) + '0';
127                         } else {
128                                 *cur_pos++ = '?';
129                         }
130                 } else {
131                         /* normal character */
132                         *cur_pos++ = *src;
133                 }
134                 src++;
135                 srclen--;
136                 dstlen -= cur_pos - dst;
137                 dst = cur_pos;
138         }
139         *dst = '\0';
140 }
141
142 /*
143  * Compare string with pattern, returning 0 on match.
144  * Short pattern matches trailing blanks in name,
145  * wildcard '*' in pattern matches rest of name,
146  * wildcard '?' matches a single non-space character.
147  */
148 int
149 cam_strmatch(const u_int8_t *str, const u_int8_t *pattern, int str_len)
150 {
151
152         while (*pattern != '\0'&& str_len > 0) {  
153
154                 if (*pattern == '*') {
155                         return (0);
156                 }
157                 if ((*pattern != *str)
158                  && (*pattern != '?' || *str == ' ')) {
159                         return (1);
160                 }
161                 pattern++;
162                 str++;
163                 str_len--;
164         }
165         while (str_len > 0 && *str++ == ' ')
166                 str_len--;
167
168         return (str_len);
169 }
170
171 caddr_t
172 cam_quirkmatch(caddr_t target, caddr_t quirk_table, int num_entries,
173                int entry_size, cam_quirkmatch_t *comp_func)
174 {
175         for (; num_entries > 0; num_entries--, quirk_table += entry_size) {
176                 if ((*comp_func)(target, quirk_table) == 0)
177                         return (quirk_table);
178         }
179         return (NULL);
180 }
181
182 const struct cam_status_entry*
183 cam_fetch_status_entry(cam_status status)
184 {
185         status &= CAM_STATUS_MASK;
186         return (bsearch(&status, &cam_status_table,
187                         num_cam_status_entries,
188                         sizeof(*cam_status_table),
189                         camstatusentrycomp));
190 }
191
192 static int
193 camstatusentrycomp(const void *key, const void *member)
194 {
195         cam_status status;
196         const struct cam_status_entry *table_entry;
197
198         status = *(const cam_status *)key;
199         table_entry = (const struct cam_status_entry *)member;
200
201         return (status - table_entry->status_code);
202 }
203
204
205 #ifdef _KERNEL
206 char *
207 cam_error_string(union ccb *ccb, char *str, int str_len,
208                  cam_error_string_flags flags,
209                  cam_error_proto_flags proto_flags)
210 #else /* !_KERNEL */
211 char *
212 cam_error_string(struct cam_device *device, union ccb *ccb, char *str,
213                  int str_len, cam_error_string_flags flags,
214                  cam_error_proto_flags proto_flags)
215 #endif /* _KERNEL/!_KERNEL */
216 {
217         char path_str[64];
218         struct sbuf sb;
219
220         if ((ccb == NULL)
221          || (str == NULL)
222          || (str_len <= 0))
223                 return(NULL);
224
225         if (flags == CAM_ESF_NONE)
226                 return(NULL);
227
228         switch (ccb->ccb_h.func_code) {
229                 case XPT_SCSI_IO:
230                         switch (proto_flags & CAM_EPF_LEVEL_MASK) {
231                         case CAM_EPF_NONE:
232                                 break;
233                         case CAM_EPF_ALL:
234                         case CAM_EPF_NORMAL:
235                                 proto_flags |= CAM_ESF_PRINT_SENSE;
236                                 /* FALLTHROUGH */
237                         case CAM_EPF_MINIMAL:
238                                 proto_flags |= CAM_ESF_PRINT_STATUS;
239                                 /* FALLTHROUGH */
240                         default:
241                                 break;
242                         }
243                         break;
244                 default:
245                         break;
246         }
247 #ifdef _KERNEL
248         xpt_path_string(ccb->csio.ccb_h.path, path_str, sizeof(path_str));
249 #else /* !_KERNEL */
250         cam_path_string(device, path_str, sizeof(path_str));
251 #endif /* _KERNEL/!_KERNEL */
252
253         sbuf_new(&sb, str, str_len, 0);
254
255         if (flags & CAM_ESF_COMMAND) {
256
257                 sbuf_cat(&sb, path_str);
258
259                 switch (ccb->ccb_h.func_code) {
260                 case XPT_SCSI_IO:
261 #ifdef _KERNEL
262                         scsi_command_string(&ccb->csio, &sb);
263 #else /* !_KERNEL */
264                         scsi_command_string(device, &ccb->csio, &sb);
265 #endif /* _KERNEL/!_KERNEL */
266                         sbuf_printf(&sb, "\n");
267                         
268                         break;
269                 default:
270                         break;
271                 }
272         }
273
274         if (flags & CAM_ESF_CAM_STATUS) {
275                 cam_status status;
276                 const struct cam_status_entry *entry;
277
278                 sbuf_cat(&sb, path_str);
279   
280                 status = ccb->ccb_h.status & CAM_STATUS_MASK;
281
282                 entry = cam_fetch_status_entry(status);
283
284                 if (entry == NULL)
285                         sbuf_printf(&sb, "CAM Status: Unknown (%#x)\n",
286                                     ccb->ccb_h.status);
287                 else
288                         sbuf_printf(&sb, "CAM Status: %s\n",
289                                     entry->status_text);
290         }
291
292         if (flags & CAM_ESF_PROTO_STATUS) {
293   
294                 switch (ccb->ccb_h.func_code) {
295                 case XPT_SCSI_IO:
296                         if ((ccb->ccb_h.status & CAM_STATUS_MASK) !=
297                              CAM_SCSI_STATUS_ERROR)
298                                 break;
299
300                         if (proto_flags & CAM_ESF_PRINT_STATUS) {
301                                 sbuf_cat(&sb, path_str);
302                                 /*
303                                  * Print out the SCSI status byte as long as
304                                  * the user wants some protocol output.
305                                  */
306                                 sbuf_printf(&sb, "SCSI Status: %s\n",
307                                             scsi_status_string(&ccb->csio));
308                         }
309
310                         if ((proto_flags & CAM_ESF_PRINT_SENSE)
311                          && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
312                          && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)) {
313
314 #ifdef _KERNEL
315                                 scsi_sense_sbuf(&ccb->csio, &sb,
316                                                 SSS_FLAG_NONE);
317 #else /* !_KERNEL */
318                                 scsi_sense_sbuf(device, &ccb->csio, &sb,
319                                                 SSS_FLAG_NONE);
320 #endif /* _KERNEL/!_KERNEL */
321                         }
322                         break;
323                 default:
324                         break;
325                 }
326         }
327
328         sbuf_finish(&sb);
329
330         return(sbuf_data(&sb));
331 }
332
333 #ifdef _KERNEL
334
335 void
336 cam_error_print(union ccb *ccb, cam_error_string_flags flags,
337                 cam_error_proto_flags proto_flags)
338 {
339         char str[512];
340
341         printf("%s", cam_error_string(ccb, str, sizeof(str), flags,
342                proto_flags));
343 }
344
345 #else /* !_KERNEL */
346
347 void
348 cam_error_print(struct cam_device *device, union ccb *ccb,
349                 cam_error_string_flags flags, cam_error_proto_flags proto_flags,
350                 FILE *ofile)
351 {
352         char str[512];
353
354         if ((device == NULL) || (ccb == NULL) || (ofile == NULL))
355                 return;
356
357         fprintf(ofile, "%s", cam_error_string(device, ccb, str, sizeof(str),
358                 flags, proto_flags));
359 }
360
361 #endif /* _KERNEL/!_KERNEL */
362
363 /*
364  * Common calculate geometry fuction
365  *
366  * Caller should set ccg->volume_size and block_size.
367  * The extended parameter should be zero if extended translation
368  * should not be used.
369  */
370 void
371 cam_calc_geometry(struct ccb_calc_geometry *ccg, int extended)
372 {
373         uint32_t size_mb, secs_per_cylinder;
374
375         if (ccg->block_size == 0) {
376                 ccg->ccb_h.status = CAM_REQ_CMP_ERR;
377                 return;
378         }
379         size_mb = (1024L * 1024L) / ccg->block_size;
380         if (size_mb == 0) {
381                 ccg->ccb_h.status = CAM_REQ_CMP_ERR;
382                 return;
383         }
384         size_mb = ccg->volume_size / size_mb;
385         if (size_mb > 1024 && extended) {
386                 ccg->heads = 255;
387                 ccg->secs_per_track = 63;
388         } else {
389                 ccg->heads = 64;
390                 ccg->secs_per_track = 32;
391         }
392         secs_per_cylinder = ccg->heads * ccg->secs_per_track;
393         if (secs_per_cylinder == 0) {
394                 ccg->ccb_h.status = CAM_REQ_CMP_ERR;
395                 return;
396         }
397         ccg->cylinders = ccg->volume_size / secs_per_cylinder;
398         ccg->ccb_h.status = CAM_REQ_CMP;
399 }