/* * This defines the scsi logging feature. It is a means by which the user can * select how much information they get about various goings on, and it can be * really useful for fault tracing. The logging word is divided into 10 3-bit * bitfields, each of which describes a loglevel. The division of things is * somewhat arbitrary, and the division of the word could be changed if it * were really needed for any reason. The numbers below are the only place * where these are specified. For a first go-around, 3 bits is more than * enough, since this gives 8 levels of logging (really 7, since 0 is always * off). Cutting to 2 bits might be wise at some point.
*/
#define SCSI_CHECK_LOGGING(SHIFT, BITS, LEVEL, CMD) \ do { \ if (unlikely((SCSI_LOG_LEVEL(SHIFT, BITS)) > (LEVEL))) \ do { \
CMD; \
} while (0); \
} while (0) #else #define SCSI_LOG_LEVEL(SHIFT, BITS) 0 #define SCSI_CHECK_LOGGING(SHIFT, BITS, LEVEL, CMD) do { } while (0) #endif/* CONFIG_SCSI_LOGGING */
/* * These are the macros that are actually used throughout the code to * log events. If logging isn't enabled, they are no-ops and will be * completely absent from the user's code.
*/ #define SCSI_LOG_ERROR_RECOVERY(LEVEL,CMD) \
SCSI_CHECK_LOGGING(SCSI_LOG_ERROR_SHIFT, SCSI_LOG_ERROR_BITS, LEVEL,CMD); #define SCSI_LOG_TIMEOUT(LEVEL,CMD) \
SCSI_CHECK_LOGGING(SCSI_LOG_TIMEOUT_SHIFT, SCSI_LOG_TIMEOUT_BITS, LEVEL,CMD); #define SCSI_LOG_SCAN_BUS(LEVEL,CMD) \
SCSI_CHECK_LOGGING(SCSI_LOG_SCAN_SHIFT, SCSI_LOG_SCAN_BITS, LEVEL,CMD); #define SCSI_LOG_MLQUEUE(LEVEL,CMD) \
SCSI_CHECK_LOGGING(SCSI_LOG_MLQUEUE_SHIFT, SCSI_LOG_MLQUEUE_BITS, LEVEL,CMD); #define SCSI_LOG_MLCOMPLETE(LEVEL,CMD) \
SCSI_CHECK_LOGGING(SCSI_LOG_MLCOMPLETE_SHIFT, SCSI_LOG_MLCOMPLETE_BITS, LEVEL,CMD); #define SCSI_LOG_LLQUEUE(LEVEL,CMD) \
SCSI_CHECK_LOGGING(SCSI_LOG_LLQUEUE_SHIFT, SCSI_LOG_LLQUEUE_BITS, LEVEL,CMD); #define SCSI_LOG_LLCOMPLETE(LEVEL,CMD) \
SCSI_CHECK_LOGGING(SCSI_LOG_LLCOMPLETE_SHIFT, SCSI_LOG_LLCOMPLETE_BITS, LEVEL,CMD); #define SCSI_LOG_HLQUEUE(LEVEL,CMD) \
SCSI_CHECK_LOGGING(SCSI_LOG_HLQUEUE_SHIFT, SCSI_LOG_HLQUEUE_BITS, LEVEL,CMD); #define SCSI_LOG_HLCOMPLETE(LEVEL,CMD) \
SCSI_CHECK_LOGGING(SCSI_LOG_HLCOMPLETE_SHIFT, SCSI_LOG_HLCOMPLETE_BITS, LEVEL,CMD); #define SCSI_LOG_IOCTL(LEVEL,CMD) \
SCSI_CHECK_LOGGING(SCSI_LOG_IOCTL_SHIFT, SCSI_LOG_IOCTL_BITS, LEVEL,CMD);
#endif/* _SCSI_LOGGING_H */
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