/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _SCSI_LOGGING_H
#define _SCSI_LOGGING_H
/*
* 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_LOG_ERROR_SHIFT 0
#define SCSI_LOG_TIMEOUT_SHIFT 3
#define SCSI_LOG_SCAN_SHIFT 6
#define SCSI_LOG_MLQUEUE_SHIFT 9
#define SCSI_LOG_MLCOMPLETE_SHIFT 12
#define SCSI_LOG_LLQUEUE_SHIFT 15
#define SCSI_LOG_LLCOMPLETE_SHIFT 18
#define SCSI_LOG_HLQUEUE_SHIFT 21
#define SCSI_LOG_HLCOMPLETE_SHIFT 24
#define SCSI_LOG_IOCTL_SHIFT 27
#define SCSI_LOG_ERROR_BITS 3
#define SCSI_LOG_TIMEOUT_BITS 3
#define SCSI_LOG_SCAN_BITS 3
#define SCSI_LOG_MLQUEUE_BITS 3
#define SCSI_LOG_MLCOMPLETE_BITS 3
#define SCSI_LOG_LLQUEUE_BITS 3
#define SCSI_LOG_LLCOMPLETE_BITS 3
#define SCSI_LOG_HLQUEUE_BITS 3
#define SCSI_LOG_HLCOMPLETE_BITS 3
#define SCSI_LOG_IOCTL_BITS 3
extern unsigned int scsi_logging_level;
#ifdef CONFIG_SCSI_LOGGING
#define SCSI_LOG_LEVEL(SHIFT, BITS) \
((scsi_logging_level >> (SHIFT)) & ((1 << (BITS)) - 1 ))
#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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