FreeBSD/Linux Kernel Cross Reference
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 #include <camlib.h>
41 #endif /* _KERNEL */
42
43 #include <cam/cam.h>
44 #include <cam/cam_ccb.h>
45 #include <cam/scsi/scsi_all.h>
46 #include <sys/sbuf.h>
47
48 #ifdef _KERNEL
49 #include <sys/libkern.h>
50 #include <cam/cam_queue.h>
51 #include <cam/cam_xpt.h>
52 #endif
53
54 static int camstatusentrycomp(const void *key, const void *member);
55
56 const struct cam_status_entry cam_status_table[] = {
57 { CAM_REQ_INPROG, "CCB request is in progress" },
58 { CAM_REQ_CMP, "CCB request completed without error" },
59 { CAM_REQ_ABORTED, "CCB request aborted by the host" },
60 { CAM_UA_ABORT, "Unable to abort CCB request" },
61 { CAM_REQ_CMP_ERR, "CCB request completed with an error" },
62 { CAM_BUSY, "CAM subsystem is busy" },
63 { CAM_REQ_INVALID, "CCB request was invalid" },
64 { CAM_PATH_INVALID, "Supplied Path ID is invalid" },
65 { CAM_DEV_NOT_THERE, "Device Not Present" },
66 { CAM_UA_TERMIO, "Unable to terminate I/O CCB request" },
67 { CAM_SEL_TIMEOUT, "Selection Timeout" },
68 { CAM_CMD_TIMEOUT, "Command timeout" },
69 { CAM_SCSI_STATUS_ERROR, "SCSI Status Error" },
70 { CAM_MSG_REJECT_REC, "Message Reject Reveived" },
71 { CAM_SCSI_BUS_RESET, "SCSI Bus Reset Sent/Received" },
72 { CAM_UNCOR_PARITY, "Uncorrectable parity/CRC error" },
73 { CAM_AUTOSENSE_FAIL, "Auto-Sense Retrieval Failed" },
74 { CAM_NO_HBA, "No HBA Detected" },
75 { CAM_DATA_RUN_ERR, "Data Overrun error" },
76 { CAM_UNEXP_BUSFREE, "Unexpected Bus Free" },
77 { CAM_SEQUENCE_FAIL, "Target Bus Phase Sequence Failure" },
78 { CAM_CCB_LEN_ERR, "CCB length supplied is inadequate" },
79 { CAM_PROVIDE_FAIL, "Unable to provide requested capability" },
80 { CAM_BDR_SENT, "SCSI BDR Message Sent" },
81 { CAM_REQ_TERMIO, "CCB request terminated by the host" },
82 { CAM_UNREC_HBA_ERROR, "Unrecoverable Host Bus Adapter Error" },
83 { CAM_REQ_TOO_BIG, "The request was too large for this host" },
84 { CAM_REQUEUE_REQ, "Unconditionally Re-queue Request", },
85 { CAM_ATA_STATUS_ERROR, "ATA Status Error" },
86 { CAM_IDE, "Initiator Detected Error Message Received" },
87 { CAM_RESRC_UNAVAIL, "Resource Unavailable" },
88 { CAM_UNACKED_EVENT, "Unacknowledged Event by Host" },
89 { CAM_MESSAGE_RECV, "Message Received in Host Target Mode" },
90 { CAM_INVALID_CDB, "Invalid CDB received in Host Target Mode" },
91 { CAM_LUN_INVALID, "Invalid Lun" },
92 { CAM_TID_INVALID, "Invalid Target ID" },
93 { CAM_FUNC_NOTAVAIL, "Function Not Available" },
94 { CAM_NO_NEXUS, "Nexus Not Established" },
95 { CAM_IID_INVALID, "Invalid Initiator ID" },
96 { CAM_CDB_RECVD, "CDB Received" },
97 { CAM_LUN_ALRDY_ENA, "LUN Already Enabled for Target Mode" },
98 { CAM_SCSI_BUSY, "SCSI Bus Busy" },
99 };
100
101 const int num_cam_status_entries =
102 sizeof(cam_status_table)/sizeof(*cam_status_table);
103
104 #ifdef _KERNEL
105 SYSCTL_NODE(_kern, OID_AUTO, cam, CTLFLAG_RD, 0, "CAM Subsystem");
106
107 #ifndef CAM_DEFAULT_SORT_IO_QUEUES
108 #define CAM_DEFAULT_SORT_IO_QUEUES 1
109 #endif
110
111 int cam_sort_io_queues = CAM_DEFAULT_SORT_IO_QUEUES;
112 TUNABLE_INT("kern.cam.sort_io_queues", &cam_sort_io_queues);
113 SYSCTL_INT(_kern_cam, OID_AUTO, sort_io_queues, CTLFLAG_RWTUN,
114 &cam_sort_io_queues, 0, "Sort IO queues to try and optimise disk access patterns");
115 #endif
116
117 void
118 cam_strvis(u_int8_t *dst, const u_int8_t *src, int srclen, int dstlen)
119 {
120
121 /* Trim leading/trailing spaces, nulls. */
122 while (srclen > 0 && src[0] == ' ')
123 src++, srclen--;
124 while (srclen > 0
125 && (src[srclen-1] == ' ' || src[srclen-1] == '\0'))
126 srclen--;
127
128 while (srclen > 0 && dstlen > 1) {
129 u_int8_t *cur_pos = dst;
130
131 if (*src < 0x20 || *src >= 0x80) {
132 /* SCSI-II Specifies that these should never occur. */
133 /* non-printable character */
134 if (dstlen > 4) {
135 *cur_pos++ = '\\';
136 *cur_pos++ = ((*src & 0300) >> 6) + '';
137 *cur_pos++ = ((*src & 0070) >> 3) + '';
138 *cur_pos++ = ((*src & 0007) >> 0) + '';
139 } else {
140 *cur_pos++ = '?';
141 }
142 } else {
143 /* normal character */
144 *cur_pos++ = *src;
145 }
146 src++;
147 srclen--;
148 dstlen -= cur_pos - dst;
149 dst = cur_pos;
150 }
151 *dst = '\0';
152 }
153
154 /*
155 * Compare string with pattern, returning 0 on match.
156 * Short pattern matches trailing blanks in name,
157 * wildcard '*' in pattern matches rest of name,
158 * wildcard '?' matches a single non-space character.
159 */
160 int
161 cam_strmatch(const u_int8_t *str, const u_int8_t *pattern, int str_len)
162 {
163
164 while (*pattern != '\0'&& str_len > 0) {
165
166 if (*pattern == '*') {
167 return (0);
168 }
169 if ((*pattern != *str)
170 && (*pattern != '?' || *str == ' ')) {
171 return (1);
172 }
173 pattern++;
174 str++;
175 str_len--;
176 }
177 while (str_len > 0 && *str == ' ') {
178 str++;
179 str_len--;
180 }
181 if (str_len > 0 && *str == 0)
182 str_len = 0;
183
184 return (str_len);
185 }
186
187 caddr_t
188 cam_quirkmatch(caddr_t target, caddr_t quirk_table, int num_entries,
189 int entry_size, cam_quirkmatch_t *comp_func)
190 {
191 for (; num_entries > 0; num_entries--, quirk_table += entry_size) {
192 if ((*comp_func)(target, quirk_table) == 0)
193 return (quirk_table);
194 }
195 return (NULL);
196 }
197
198 const struct cam_status_entry*
199 cam_fetch_status_entry(cam_status status)
200 {
201 status &= CAM_STATUS_MASK;
202 return (bsearch(&status, &cam_status_table,
203 num_cam_status_entries,
204 sizeof(*cam_status_table),
205 camstatusentrycomp));
206 }
207
208 static int
209 camstatusentrycomp(const void *key, const void *member)
210 {
211 cam_status status;
212 const struct cam_status_entry *table_entry;
213
214 status = *(const cam_status *)key;
215 table_entry = (const struct cam_status_entry *)member;
216
217 return (status - table_entry->status_code);
218 }
219
220
221 #ifdef _KERNEL
222 char *
223 cam_error_string(union ccb *ccb, char *str, int str_len,
224 cam_error_string_flags flags,
225 cam_error_proto_flags proto_flags)
226 #else /* !_KERNEL */
227 char *
228 cam_error_string(struct cam_device *device, union ccb *ccb, char *str,
229 int str_len, cam_error_string_flags flags,
230 cam_error_proto_flags proto_flags)
231 #endif /* _KERNEL/!_KERNEL */
232 {
233 char path_str[64];
234 struct sbuf sb;
235
236 if ((ccb == NULL)
237 || (str == NULL)
238 || (str_len <= 0))
239 return(NULL);
240
241 if (flags == CAM_ESF_NONE)
242 return(NULL);
243
244 switch (ccb->ccb_h.func_code) {
245 case XPT_ATA_IO:
246 switch (proto_flags & CAM_EPF_LEVEL_MASK) {
247 case CAM_EPF_NONE:
248 break;
249 case CAM_EPF_ALL:
250 case CAM_EPF_NORMAL:
251 proto_flags |= CAM_EAF_PRINT_RESULT;
252 /* FALLTHROUGH */
253 case CAM_EPF_MINIMAL:
254 proto_flags |= CAM_EAF_PRINT_STATUS;
255 /* FALLTHROUGH */
256 default:
257 break;
258 }
259 break;
260 case XPT_SCSI_IO:
261 switch (proto_flags & CAM_EPF_LEVEL_MASK) {
262 case CAM_EPF_NONE:
263 break;
264 case CAM_EPF_ALL:
265 case CAM_EPF_NORMAL:
266 proto_flags |= CAM_ESF_PRINT_SENSE;
267 /* FALLTHROUGH */
268 case CAM_EPF_MINIMAL:
269 proto_flags |= CAM_ESF_PRINT_STATUS;
270 /* FALLTHROUGH */
271 default:
272 break;
273 }
274 break;
275 default:
276 break;
277 }
278 #ifdef _KERNEL
279 xpt_path_string(ccb->csio.ccb_h.path, path_str, sizeof(path_str));
280 #else /* !_KERNEL */
281 cam_path_string(device, path_str, sizeof(path_str));
282 #endif /* _KERNEL/!_KERNEL */
283
284 sbuf_new(&sb, str, str_len, 0);
285
286 if (flags & CAM_ESF_COMMAND) {
287 sbuf_cat(&sb, path_str);
288 switch (ccb->ccb_h.func_code) {
289 case XPT_ATA_IO:
290 ata_command_sbuf(&ccb->ataio, &sb);
291 sbuf_printf(&sb, "\n");
292 break;
293 case XPT_SCSI_IO:
294 #ifdef _KERNEL
295 scsi_command_string(&ccb->csio, &sb);
296 #else /* !_KERNEL */
297 scsi_command_string(device, &ccb->csio, &sb);
298 #endif /* _KERNEL/!_KERNEL */
299 sbuf_printf(&sb, "\n");
300 break;
301 default:
302 break;
303 }
304 }
305
306 if (flags & CAM_ESF_CAM_STATUS) {
307 cam_status status;
308 const struct cam_status_entry *entry;
309
310 sbuf_cat(&sb, path_str);
311
312 status = ccb->ccb_h.status & CAM_STATUS_MASK;
313
314 entry = cam_fetch_status_entry(status);
315
316 if (entry == NULL)
317 sbuf_printf(&sb, "CAM status: Unknown (%#x)\n",
318 ccb->ccb_h.status);
319 else
320 sbuf_printf(&sb, "CAM status: %s\n",
321 entry->status_text);
322 }
323
324 if (flags & CAM_ESF_PROTO_STATUS) {
325
326 switch (ccb->ccb_h.func_code) {
327 case XPT_ATA_IO:
328 if ((ccb->ccb_h.status & CAM_STATUS_MASK) !=
329 CAM_ATA_STATUS_ERROR)
330 break;
331 if (proto_flags & CAM_EAF_PRINT_STATUS) {
332 sbuf_cat(&sb, path_str);
333 ata_status_sbuf(&ccb->ataio, &sb);
334 sbuf_printf(&sb, "\n");
335 }
336 if (proto_flags & CAM_EAF_PRINT_RESULT) {
337 sbuf_cat(&sb, path_str);
338 ata_res_sbuf(&ccb->ataio, &sb);
339 sbuf_printf(&sb, "\n");
340 }
341
342 break;
343 case XPT_SCSI_IO:
344 if ((ccb->ccb_h.status & CAM_STATUS_MASK) !=
345 CAM_SCSI_STATUS_ERROR)
346 break;
347
348 if (proto_flags & CAM_ESF_PRINT_STATUS) {
349 sbuf_cat(&sb, path_str);
350 sbuf_printf(&sb, "SCSI status: %s\n",
351 scsi_status_string(&ccb->csio));
352 }
353
354 if ((proto_flags & CAM_ESF_PRINT_SENSE)
355 && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
356 && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)) {
357
358 #ifdef _KERNEL
359 scsi_sense_sbuf(&ccb->csio, &sb,
360 SSS_FLAG_NONE);
361 #else /* !_KERNEL */
362 scsi_sense_sbuf(device, &ccb->csio, &sb,
363 SSS_FLAG_NONE);
364 #endif /* _KERNEL/!_KERNEL */
365 }
366 break;
367 default:
368 break;
369 }
370 }
371
372 sbuf_finish(&sb);
373
374 return(sbuf_data(&sb));
375 }
376
377 #ifdef _KERNEL
378
379 void
380 cam_error_print(union ccb *ccb, cam_error_string_flags flags,
381 cam_error_proto_flags proto_flags)
382 {
383 char str[512];
384
385 printf("%s", cam_error_string(ccb, str, sizeof(str), flags,
386 proto_flags));
387 }
388
389 #else /* !_KERNEL */
390
391 void
392 cam_error_print(struct cam_device *device, union ccb *ccb,
393 cam_error_string_flags flags, cam_error_proto_flags proto_flags,
394 FILE *ofile)
395 {
396 char str[512];
397
398 if ((device == NULL) || (ccb == NULL) || (ofile == NULL))
399 return;
400
401 fprintf(ofile, "%s", cam_error_string(device, ccb, str, sizeof(str),
402 flags, proto_flags));
403 }
404
405 #endif /* _KERNEL/!_KERNEL */
406
407 /*
408 * Common calculate geometry fuction
409 *
410 * Caller should set ccg->volume_size and block_size.
411 * The extended parameter should be zero if extended translation
412 * should not be used.
413 */
414 void
415 cam_calc_geometry(struct ccb_calc_geometry *ccg, int extended)
416 {
417 uint32_t size_mb, secs_per_cylinder;
418
419 if (ccg->block_size == 0) {
420 ccg->ccb_h.status = CAM_REQ_CMP_ERR;
421 return;
422 }
423 size_mb = (1024L * 1024L) / ccg->block_size;
424 if (size_mb == 0) {
425 ccg->ccb_h.status = CAM_REQ_CMP_ERR;
426 return;
427 }
428 size_mb = ccg->volume_size / size_mb;
429 if (size_mb > 1024 && extended) {
430 ccg->heads = 255;
431 ccg->secs_per_track = 63;
432 } else {
433 ccg->heads = 64;
434 ccg->secs_per_track = 32;
435 }
436 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
437 if (secs_per_cylinder == 0) {
438 ccg->ccb_h.status = CAM_REQ_CMP_ERR;
439 return;
440 }
441 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
442 ccg->ccb_h.status = CAM_REQ_CMP;
443 }
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