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85 lines
3.6 KiB
85 lines
3.6 KiB
/* 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) do { } while (0) |
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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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