86 lines
3.6 KiB
C
86 lines
3.6 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _SCSI_LOGGING_H
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#define _SCSI_LOGGING_H
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/*
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* This defines the scsi logging feature. It is a means by which the user can
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* select how much information they get about various goings on, and it can be
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* really useful for fault tracing. The logging word is divided into 10 3-bit
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* bitfields, each of which describes a loglevel. The division of things is
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* somewhat arbitrary, and the division of the word could be changed if it
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* were really needed for any reason. The numbers below are the only place
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* where these are specified. For a first go-around, 3 bits is more than
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* enough, since this gives 8 levels of logging (really 7, since 0 is always
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* off). Cutting to 2 bits might be wise at some point.
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*/
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#define SCSI_LOG_ERROR_SHIFT 0
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#define SCSI_LOG_TIMEOUT_SHIFT 3
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#define SCSI_LOG_SCAN_SHIFT 6
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#define SCSI_LOG_MLQUEUE_SHIFT 9
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#define SCSI_LOG_MLCOMPLETE_SHIFT 12
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#define SCSI_LOG_LLQUEUE_SHIFT 15
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#define SCSI_LOG_LLCOMPLETE_SHIFT 18
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#define SCSI_LOG_HLQUEUE_SHIFT 21
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#define SCSI_LOG_HLCOMPLETE_SHIFT 24
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#define SCSI_LOG_IOCTL_SHIFT 27
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#define SCSI_LOG_ERROR_BITS 3
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#define SCSI_LOG_TIMEOUT_BITS 3
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#define SCSI_LOG_SCAN_BITS 3
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#define SCSI_LOG_MLQUEUE_BITS 3
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#define SCSI_LOG_MLCOMPLETE_BITS 3
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#define SCSI_LOG_LLQUEUE_BITS 3
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#define SCSI_LOG_LLCOMPLETE_BITS 3
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#define SCSI_LOG_HLQUEUE_BITS 3
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#define SCSI_LOG_HLCOMPLETE_BITS 3
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#define SCSI_LOG_IOCTL_BITS 3
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extern unsigned int scsi_logging_level;
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#ifdef CONFIG_SCSI_LOGGING
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#define SCSI_LOG_LEVEL(SHIFT, BITS) \
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((scsi_logging_level >> (SHIFT)) & ((1 << (BITS)) - 1))
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#define SCSI_CHECK_LOGGING(SHIFT, BITS, LEVEL, CMD) \
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do { \
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if (unlikely((SCSI_LOG_LEVEL(SHIFT, BITS)) > (LEVEL))) \
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do { \
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CMD; \
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} while (0); \
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} while (0)
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#else
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#define SCSI_LOG_LEVEL(SHIFT, BITS) 0
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#define SCSI_CHECK_LOGGING(SHIFT, BITS, LEVEL, CMD)
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#endif /* CONFIG_SCSI_LOGGING */
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/*
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* These are the macros that are actually used throughout the code to
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* log events. If logging isn't enabled, they are no-ops and will be
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* completely absent from the user's code.
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*/
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#define SCSI_LOG_ERROR_RECOVERY(LEVEL,CMD) \
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SCSI_CHECK_LOGGING(SCSI_LOG_ERROR_SHIFT, SCSI_LOG_ERROR_BITS, LEVEL,CMD);
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#define SCSI_LOG_TIMEOUT(LEVEL,CMD) \
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SCSI_CHECK_LOGGING(SCSI_LOG_TIMEOUT_SHIFT, SCSI_LOG_TIMEOUT_BITS, LEVEL,CMD);
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#define SCSI_LOG_SCAN_BUS(LEVEL,CMD) \
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SCSI_CHECK_LOGGING(SCSI_LOG_SCAN_SHIFT, SCSI_LOG_SCAN_BITS, LEVEL,CMD);
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#define SCSI_LOG_MLQUEUE(LEVEL,CMD) \
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SCSI_CHECK_LOGGING(SCSI_LOG_MLQUEUE_SHIFT, SCSI_LOG_MLQUEUE_BITS, LEVEL,CMD);
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#define SCSI_LOG_MLCOMPLETE(LEVEL,CMD) \
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SCSI_CHECK_LOGGING(SCSI_LOG_MLCOMPLETE_SHIFT, SCSI_LOG_MLCOMPLETE_BITS, LEVEL,CMD);
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#define SCSI_LOG_LLQUEUE(LEVEL,CMD) \
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SCSI_CHECK_LOGGING(SCSI_LOG_LLQUEUE_SHIFT, SCSI_LOG_LLQUEUE_BITS, LEVEL,CMD);
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#define SCSI_LOG_LLCOMPLETE(LEVEL,CMD) \
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SCSI_CHECK_LOGGING(SCSI_LOG_LLCOMPLETE_SHIFT, SCSI_LOG_LLCOMPLETE_BITS, LEVEL,CMD);
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#define SCSI_LOG_HLQUEUE(LEVEL,CMD) \
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SCSI_CHECK_LOGGING(SCSI_LOG_HLQUEUE_SHIFT, SCSI_LOG_HLQUEUE_BITS, LEVEL,CMD);
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#define SCSI_LOG_HLCOMPLETE(LEVEL,CMD) \
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SCSI_CHECK_LOGGING(SCSI_LOG_HLCOMPLETE_SHIFT, SCSI_LOG_HLCOMPLETE_BITS, LEVEL,CMD);
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#define SCSI_LOG_IOCTL(LEVEL,CMD) \
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SCSI_CHECK_LOGGING(SCSI_LOG_IOCTL_SHIFT, SCSI_LOG_IOCTL_BITS, LEVEL,CMD);
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#endif /* _SCSI_LOGGING_H */
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