sys/bus/cam/cam_debug.h

root/sys/bus/cam/cam_debug.h
/*
 * Macros for tracing/loging information in the CAM layer
 *
 * Copyright (c) 1997 Justin T. Gibbs.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification, immediately at the beginning of the file.
 * 2. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD: src/sys/cam/cam_debug.h,v 1.6 1999/12/29 04:54:25 peter Exp $
 * $DragonFly: src/sys/bus/cam/cam_debug.h,v 1.4 2007/11/18 17:53:01 pavalos Exp $
 */
#ifndef _CAM_CAM_DEBUG_H
#define _CAM_CAM_DEBUG_H 1

#if defined(CAMDEBUG) && defined(_KERNEL)
#include <machine/clock.h>
#endif /* CAMDEBUG && _KERNEL */

/*
 * Debugging flags.
 */
typedef enum {
        CAM_DEBUG_NONE          = 0x00, /* no debugging */
        CAM_DEBUG_INFO          = 0x01, /* scsi commands, errors, data */ 
        CAM_DEBUG_TRACE         = 0x02, /* routine flow tracking */
        CAM_DEBUG_SUBTRACE      = 0x04, /* internal to routine flows */
        CAM_DEBUG_CDB           = 0x08, /* print out SCSI CDBs only */
        CAM_DEBUG_XPT           = 0x10, /* print out xpt scheduling */
        CAM_DEBUG_PERIPH        = 0x20  /* print out peripheral calls */
} cam_debug_flags;

#if defined(CAMDEBUG) && defined(_KERNEL)

/* Path we want to debug */
extern struct cam_path *cam_dpath;
/* Current debug levels set */
extern u_int32_t cam_dflags;
/* Printf delay value (to prevent scrolling) */
extern u_int32_t cam_debug_delay;
 
/* Debugging macros. */
#define CAM_DEBUGGED(path, flag)                        \
        ((cam_dflags & (flag))                          \
         && (cam_dpath != NULL)                         \
         && (xpt_path_comp(cam_dpath, path) >= 0)       \
         && (xpt_path_comp(cam_dpath, path) < 2))
#define CAM_DEBUG(path, flag, kprintfargs)              \
        if ((cam_dflags & (flag))                       \
         && (cam_dpath != NULL)                         \
         && (xpt_path_comp(cam_dpath, path) >= 0)       \
         && (xpt_path_comp(cam_dpath, path) < 2)) {     \
                xpt_print_path(path);                   \
                kprintf kprintfargs;                    \
                if (cam_debug_delay != 0)               \
                        DELAY(cam_debug_delay);         \
        }
#define CAM_DEBUG_PRINT(flag, kprintfargs)              \
        if (cam_dflags & (flag)) {                      \
                kprintf("cam_debug: ");                 \
                kprintf kprintfargs;                    \
                if (cam_debug_delay != 0)               \
                        DELAY(cam_debug_delay);         \
        }

#else /* !CAMDEBUG || !_KERNEL */

#define CAM_DEBUGGED(A, B)      0
#define CAM_DEBUG(A, B, C)
#define CAM_DEBUG_PRINT(A, B)

#endif /* CAMDEBUG && _KERNEL */

#endif /* _CAM_CAM_DEBUG_H */
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