File: os_dec.c

package info (click to toggle)
xmcd 2.6-17sarge1
  • links: PTS
  • area: main
  • in suites: sarge
  • size: 3,464 kB
  • ctags: 5,075
  • sloc: ansic: 51,322; sh: 4,039; makefile: 82; pascal: 67
file content (363 lines) | stat: -rw-r--r-- 8,568 bytes parent folder | download | duplicates (5)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
/*
 *   libdi - scsipt SCSI Device Interface Library
 *
 *   Copyright (C) 1993-2000  Ti Kan
 *   E-mail: ti@amb.org
 *
 *   This library is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU Library General Public
 *   License as published by the Free Software Foundation; either
 *   version 2 of the License, or (at your option) any later version.
 *
 *   This library is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *   Library General Public License for more details.
 *
 *   You should have received a copy of the GNU Library General Public
 *   License along with this library; if not, write to the Free
 *   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/*
 *   OSF1, Digital UNIX, Compaq Tru64 UNIX and Ultrix support
 *
 *   Contributing author: Matt Thomas
 *   E-Mail: thomas@lkg.dec.com
 *
 *   Contributing author: Gary Field
 *   E-Mail: gfield@zk3.dec.com
 *
 *   This software fragment contains code that interfaces the
 *   application to the Digital UNIX and Ultrix operating systems.
 *   The term Digital, Ultrix and OSF/1 are used here for identification
 *   purposes only.
 */
#ifndef LINT
static char *_os_dec_c_ident_ = "@(#)os_dec.c	6.36 00/02/02";
#endif

#include "common_d/appenv.h"
#include "common_d/util.h"
#include "libdi_d/libdi.h"
#include "libdi_d/scsipt.h"

#if ((defined(__alpha) && defined(__osf__)) || \
     defined(ultrix) || defined(__ultrix)) && \
    defined(DI_SCSIPT) && !defined(DEMO_ONLY)

extern appdata_t	app_data;
extern bool_t		scsipt_notrom_error;
extern FILE		*errfp;
extern di_client_t	*di_clinfo;

STATIC int		bus = -1,
			target = -1,
			lun = -1;
STATIC req_sense_data_t sense_data;	/* Request sense data buffer */


/*
 * pthru_send
 *	Send SCSI command to the device.
 *
 * Args:
 *	fd - Device file descriptor
 *	cmdpt - Pointer to the SCSI command CDB
 *	cmdlen - SCSI command size (6, 10 or 12 bytes)
 *	datapt - Pointer to the data buffer
 *	datalen - Data transfer size (bytes)
 *	rw - Data transfer direction flag (OP_NODATA, OP_DATAIN or OP_DATAOUT)
 *	tmout - Command timeout interval (seconds)
 *	prnerr - Whether an error message should be displayed
 *		 when a command fails
 *
 * Return:
 *	TRUE - command completed successfully
 *	FALSE - command failed
 */
bool_t
pthru_send(
	int		fd,
	byte_t		*cmdpt,
	int		cmdlen,
	byte_t		*datapt,
	int		datalen,
	byte_t		rw,
	int		tmout,
	bool_t		prnerr
)
{
	UAGT_CAM_CCB	uagt;
	CCB_SCSIIO	ccb;
	char		*path,
			title[FILE_PATH_SZ + 20];

	if (fd < 0 || scsipt_notrom_error)
		return FALSE;

	path = di_devgetpath(fd);

	(void) memset(&uagt, 0, sizeof(uagt));
	(void) memset(&ccb, 0, sizeof(ccb));
	(void) memset(&sense_data, 0, sizeof(sense_data));

	/* Setup the user agent struct */
	uagt.uagt_ccb = (CCB_HEADER *) &ccb;
	uagt.uagt_ccblen = sizeof(CCB_SCSIIO);
#if defined(__alpha) && defined(__osf__)
	uagt.uagt_snsbuf = ccb.cam_sense_ptr = (u_char *) &sense_data;
	uagt.uagt_snslen = ccb.cam_sense_len = sizeof(sense_data);
#endif

	/* Setup the CAM ccb */
	(void) memcpy((byte_t *) ccb.cam_cdb_io.cam_cdb_bytes, cmdpt, cmdlen);
	ccb.cam_cdb_len = cmdlen;
	ccb.cam_ch.my_addr = (CCB_HEADER *) &ccb;
	ccb.cam_ch.cam_ccb_len = sizeof(CCB_SCSIIO);
	ccb.cam_ch.cam_func_code = XPT_SCSI_IO;

	if (datapt != NULL && datalen > 0) {
		switch (rw) {
		case OP_DATAIN:
			ccb.cam_ch.cam_flags |= CAM_DIR_IN;
			break;
		case OP_DATAOUT:
			ccb.cam_ch.cam_flags |= CAM_DIR_OUT;
			break;
		case OP_NODATA:
		default:
			break;
		}
		uagt.uagt_buffer = (u_char *) datapt;
		uagt.uagt_buflen = datalen;
	}
	else
		ccb.cam_ch.cam_flags |= CAM_DIR_NONE;

#if !defined(__alpha) || !defined(__osf__)
	ccb.cam_ch.cam_flags |= CAM_DIS_AUTOSENSE;
#endif

	ccb.cam_data_ptr = uagt.uagt_buffer;
	ccb.cam_dxfer_len = uagt.uagt_buflen;
	ccb.cam_timeout = tmout ? tmout : DFLT_CMD_TIMEOUT;

	ccb.cam_ch.cam_path_id = bus;
	ccb.cam_ch.cam_target_id = target;
	ccb.cam_ch.cam_target_lun = lun;
    
	/* Set an invalid status so we can be sure it changed */
	ccb.cam_scsi_status = 0xff;

	if (app_data.debug) {
		(void) sprintf(title, "SCSI CDB bytes (dev=%s rw=%d to=%d)",
			       path, rw, tmout);
		util_dbgdump(title, cmdpt, ccb.cam_cdb_len);
	}

	if (ioctl(fd, UAGT_CAM_IO, (caddr_t) &uagt) < 0) {
		if (app_data.scsierr_msg && prnerr)
			perror("UAGT_CAM_IO ioctl failed");

		return FALSE;
    	}

	/* Check return status */
	if ((ccb.cam_ch.cam_status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
		if (app_data.scsierr_msg && prnerr) {
			(void) fprintf(errfp,
				       "%s: %s %s:\n%s=0x%x %s=0x%x",
				       APPNAME,
				       "SCSI command fault on",
				       path,
				       "Opcode",
				       cmdpt[0],
				       "Status",
				       ccb.cam_scsi_status);
#if defined(__alpha) && defined(__osf__)
			if (sense_data.key != 0)
				(void) fprintf(errfp,
					" Key=0x%x Code=0x%x Qual=0x%x\n",
					sense_data.key,
					sense_data.code,
					sense_data.qual);
			else
#endif
				(void) fprintf(errfp, "\n");
		}

		if (ccb.cam_ch.cam_status & CAM_SIM_QFRZN) {
			(void) memset(&ccb, 0, sizeof(ccb));
			(void) memset(&uagt, 0, sizeof(uagt));

			/* Setup the user agent struct */
			uagt.uagt_ccb = (CCB_HEADER  *) &ccb;
			uagt.uagt_ccblen = sizeof(CCB_RELSIM);

			/* Setup the CAM ccb */
			ccb.cam_ch.my_addr = (struct ccb_header *) &ccb;
			ccb.cam_ch.cam_ccb_len = sizeof(CCB_RELSIM);
			ccb.cam_ch.cam_func_code = XPT_REL_SIMQ;

			ccb.cam_ch.cam_path_id = bus;
			ccb.cam_ch.cam_target_id = target;
			ccb.cam_ch.cam_target_lun = lun;

			if (ioctl(fd, UAGT_CAM_IO, (caddr_t) &uagt) < 0)
				return FALSE;
		}

		return FALSE;
	}

	return TRUE;
}


/*
 * pthru_open
 *	Open SCSI pass-through device
 *
 * Args:
 *	path - device path name string
 *
 * Return:
 *	Device file descriptor, or -1 on failure.
 */
int
pthru_open(char *path)
{
	int		fd;
	struct stat	stbuf;
	char		errstr[ERR_BUF_SZ];
	int		saverr;

	/* Check for validity of device node */
	if (stat(path, &stbuf) < 0) {
		(void) sprintf(errstr, app_data.str_staterr, path);
		DI_FATAL(errstr);
		return -1;
	}
	if (!S_ISCHR(stbuf.st_mode)) {
		(void) sprintf(errstr, app_data.str_noderr, path);
		DI_FATAL(errstr);
		return -1;
	}

	if ((fd = open(path, O_RDONLY | O_NDELAY, 0)) >= 0) {
		struct devget	devget;

		if (ioctl(fd, DEVIOCGET, &devget) >= 0) {
#ifdef __osf__
			/* OSF1, Digital UNIX, Tru64 UNIX */
			device_info_t   devi;

			if (ioctl(fd, DEVGETINFO, &devi) >= 0) {
				bus = devi.v1.businfo.bus.scsi.bus_num;
				target = devi.v1.businfo.bus.scsi.tgt_id;
				lun = devi.v1.businfo.bus.scsi.lun;
			}
			else {
				DBGPRN(errfp,
					"DEVGETINFO failed: errno=%d: %s\n",
					errno, "Using DEVIOCGET data.");
				bus = ((devget.slave_num & 0700) >> 6);
				target = ((devget.slave_num & 0070) >> 3);
				lun = (devget.slave_num & 0007);
			}
#else
			/* Ultrix */
			bus = ((devget.slave_num & 0070) >> 3);
			target = (devget.slave_num & 0007);
			lun = 0;
#endif
			(void) close(fd);

			DBGPRN(errfp, "Device bus,target,lun=%d,%d,%d\n",
				bus, target, lun);

			if ((fd = open(DEV_CAM, O_RDWR, 0)) >= 0 ||
			    (fd = open(DEV_CAM, O_RDONLY, 0)) >= 0) {

				(void) di_devreg(fd, path);

				/* Hack:  The CAM driver allows
				 * the open to succeed even if there
				 * is no CD loaded.  We test for the
				 * existence of a disc with
				 * scsipt_disc_present().
				 */
				if (!scsipt_disc_present(fd)) {
					/* No CD loaded */
					pthru_close(fd);
					return -1;
				}

				return (fd);
			}

			DBGPRN(errfp, "Cannot open %s: errno=%d\n",
			       DEV_CAM, errno);
		}
		else {
			(void) close(fd);

			DBGPRN(errfp,
			       "DEVIOCGET ioctl failed on %s: errno=%d\n",
			       path, errno);
		}
	}
	else {
		saverr = errno;
		(void) sprintf(errstr, "Cannot open %s: errno=%d",
			       path, saverr);

		if (saverr != EIO)
			DI_FATAL(errstr);

		DBGPRN(errfp, "%s\n", errstr);
	}

	fd = bus = target = lun = -1;
	return -1;
}


/*
 * pthru_close
 *	Close SCSI pass-through device
 *
 * Args:
 *	fd - Device file descriptor
 *
 * Return:
 *	Nothing.
 */
void
pthru_close(int fd)
{
	di_devunreg(fd);
	(void) close(fd);
	bus = target = lun = -1;
}


/*
 * pthru_vers
 *	Return OS Interface Module version string
 *
 * Args:
 *	Nothing.
 *
 * Return:
 *	Module version text string.
 */
char *
pthru_vers(void)
{
	return ("OS Interface module for Digital UNIX (OSF/1) & Ultrix\n");
}

#endif	/* __alpha __osf__ ultrix __ultrix DI_SCSIPT DEMO_ONLY */