The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/cam/cam_debug.h

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    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: releng/6.4/sys/cam/cam_debug.h 139743 2005-01-05 22:34:37Z imp $
   29  */
   30 #ifndef _CAM_CAM_DEBUG_H
   31 #define _CAM_CAM_DEBUG_H 1
   32 
   33 #if defined(CAMDEBUG) && defined(_KERNEL)
   34 #include <machine/clock.h>
   35 #endif /* CAMDEBUG && _KERNEL */
   36 
   37 /*
   38  * Debugging flags.
   39  */
   40 typedef enum {
   41         CAM_DEBUG_NONE          = 0x00, /* no debugging */
   42         CAM_DEBUG_INFO          = 0x01, /* scsi commands, errors, data */ 
   43         CAM_DEBUG_TRACE         = 0x02, /* routine flow tracking */
   44         CAM_DEBUG_SUBTRACE      = 0x04, /* internal to routine flows */
   45         CAM_DEBUG_CDB           = 0x08, /* print out SCSI CDBs only */
   46         CAM_DEBUG_XPT           = 0x10, /* print out xpt scheduling */
   47         CAM_DEBUG_PERIPH        = 0x20  /* print out peripheral calls */
   48 } cam_debug_flags;
   49 
   50 #if defined(CAMDEBUG) && defined(_KERNEL)
   51 
   52 /* Path we want to debug */
   53 extern struct cam_path *cam_dpath;
   54 /* Current debug levels set */
   55 extern u_int32_t cam_dflags;
   56 /* Printf delay value (to prevent scrolling) */
   57 extern u_int32_t cam_debug_delay;
   58  
   59 /* Debugging macros. */
   60 #define CAM_DEBUGGED(path, flag)                        \
   61         ((cam_dflags & (flag))                          \
   62          && (cam_dpath != NULL)                         \
   63          && (xpt_path_comp(cam_dpath, path) >= 0)       \
   64          && (xpt_path_comp(cam_dpath, path) < 2))
   65 #define CAM_DEBUG(path, flag, printfargs)               \
   66         if ((cam_dflags & (flag))                       \
   67          && (cam_dpath != NULL)                         \
   68          && (xpt_path_comp(cam_dpath, path) >= 0)       \
   69          && (xpt_path_comp(cam_dpath, path) < 2)) {     \
   70                 xpt_print_path(path);                   \
   71                 printf printfargs;                      \
   72                 if (cam_debug_delay != 0)               \
   73                         DELAY(cam_debug_delay);         \
   74         }
   75 #define CAM_DEBUG_PRINT(flag, printfargs)               \
   76         if (cam_dflags & (flag)) {                      \
   77                 printf("cam_debug: ");                  \
   78                 printf printfargs;                      \
   79                 if (cam_debug_delay != 0)               \
   80                         DELAY(cam_debug_delay);         \
   81         }
   82 
   83 #else /* !CAMDEBUG || !_KERNEL */
   84 
   85 #define CAM_DEBUGGED(A, B)      0
   86 #define CAM_DEBUG(A, B, C)
   87 #define CAM_DEBUG_PRINT(A, B)
   88 
   89 #endif /* CAMDEBUG && _KERNEL */
   90 
   91 #endif /* _CAM_CAM_DEBUG_H */

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