cam_debug.h revision 158651 
1/*-
2 * Macros for tracing/loging information in the CAM 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: head/sys/cam/cam_debug.h 158651 2006-05-16 14:37:58Z phk $
29 */
30#ifndef	_CAM_CAM_DEBUG_H
31#define _CAM_CAM_DEBUG_H 1
32
33/*
34 * Debugging flags.
35 */
36typedef enum {
37	CAM_DEBUG_NONE		= 0x00, /* no debugging */
38	CAM_DEBUG_INFO		= 0x01,	/* scsi commands, errors, data */
39	CAM_DEBUG_TRACE		= 0x02,	/* routine flow tracking */
40	CAM_DEBUG_SUBTRACE	= 0x04,	/* internal to routine flows */
41	CAM_DEBUG_CDB		= 0x08, /* print out SCSI CDBs only */
42	CAM_DEBUG_XPT		= 0x10,	/* print out xpt scheduling */
43	CAM_DEBUG_PERIPH	= 0x20  /* print out peripheral calls */
44} cam_debug_flags;
45
46#if defined(CAMDEBUG) && defined(_KERNEL)
47
48/* Path we want to debug */
49extern struct cam_path *cam_dpath;
50/* Current debug levels set */
51extern u_int32_t cam_dflags;
52/* Printf delay value (to prevent scrolling) */
53extern u_int32_t cam_debug_delay;
54
55/* Debugging macros. */
56#define	CAM_DEBUGGED(path, flag)			\
57	((cam_dflags & (flag))				\
58	 && (cam_dpath != NULL)				\
59	 && (xpt_path_comp(cam_dpath, path) >= 0)	\
60	 && (xpt_path_comp(cam_dpath, path) < 2))
61#define	CAM_DEBUG(path, flag, printfargs)		\
62	if ((cam_dflags & (flag))			\
63	 && (cam_dpath != NULL)				\
64	 && (xpt_path_comp(cam_dpath, path) >= 0)	\
65	 && (xpt_path_comp(cam_dpath, path) < 2)) {	\
66		xpt_print_path(path);			\
67 		printf printfargs;			\
68		if (cam_debug_delay != 0)		\
69			DELAY(cam_debug_delay);		\
70	}
71#define	CAM_DEBUG_PRINT(flag, printfargs)		\
72	if (cam_dflags & (flag)) {			\
73		printf("cam_debug: ");			\
74 		printf printfargs;			\
75		if (cam_debug_delay != 0)		\
76			DELAY(cam_debug_delay);		\
77	}
78
79#else /* !CAMDEBUG || !_KERNEL */
80
81#define	CAM_DEBUGGED(A, B)	0
82#define	CAM_DEBUG(A, B, C)
83#define	CAM_DEBUG_PRINT(A, B)
84
85#endif /* CAMDEBUG && _KERNEL */
86
87#endif /* _CAM_CAM_DEBUG_H */
88