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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/scsi/scsi_logging.h
1 #ifndef _SCSI_LOGGING_H
2 #define _SCSI_LOGGING_H
4 #include <linux/config.h>
7 * This defines the scsi logging feature. It is a means by which the user
8 * can select how much information they get about various goings on, and it
9 * can be really useful for fault tracing. The logging word is divided into
10 * 8 nibbles, each of which describes a loglevel. The division of things is
11 * somewhat arbitrary, and the division of the word could be changed if it
12 * were really needed for any reason. The numbers below are the only place
13 * where these are specified. For a first go-around, 3 bits is more than
14 * enough, since this gives 8 levels of logging (really 7, since 0 is always
15 * off). Cutting to 2 bits might be wise at some point.
18 #define SCSI_LOG_ERROR_SHIFT 0
19 #define SCSI_LOG_TIMEOUT_SHIFT 3
20 #define SCSI_LOG_SCAN_SHIFT 6
21 #define SCSI_LOG_MLQUEUE_SHIFT 9
22 #define SCSI_LOG_MLCOMPLETE_SHIFT 12
23 #define SCSI_LOG_LLQUEUE_SHIFT 15
24 #define SCSI_LOG_LLCOMPLETE_SHIFT 18
25 #define SCSI_LOG_HLQUEUE_SHIFT 21
26 #define SCSI_LOG_HLCOMPLETE_SHIFT 24
27 #define SCSI_LOG_IOCTL_SHIFT 27
29 #define SCSI_LOG_ERROR_BITS 3
30 #define SCSI_LOG_TIMEOUT_BITS 3
31 #define SCSI_LOG_SCAN_BITS 3
32 #define SCSI_LOG_MLQUEUE_BITS 3
33 #define SCSI_LOG_MLCOMPLETE_BITS 3
34 #define SCSI_LOG_LLQUEUE_BITS 3
35 #define SCSI_LOG_LLCOMPLETE_BITS 3
36 #define SCSI_LOG_HLQUEUE_BITS 3
37 #define SCSI_LOG_HLCOMPLETE_BITS 3
38 #define SCSI_LOG_IOCTL_BITS 3
40 extern unsigned int scsi_logging_level
;
42 #ifdef CONFIG_SCSI_LOGGING
44 #define SCSI_LOG_LEVEL(SHIFT, BITS) \
45 ((scsi_logging_level >> (SHIFT)) & ((1 << (BITS)) - 1))
47 #define SCSI_CHECK_LOGGING(SHIFT, BITS, LEVEL, CMD) \
49 if (unlikely((SCSI_LOG_LEVEL(SHIFT, BITS)) > (LEVEL))) \
53 #define SCSI_CHECK_LOGGING(SHIFT, BITS, LEVEL, CMD)
54 #endif /* CONFIG_SCSI_LOGGING */
57 * These are the macros that are actually used throughout the code to
58 * log events. If logging isn't enabled, they are no-ops and will be
59 * completely absent from the user's code.
61 #define SCSI_LOG_ERROR_RECOVERY(LEVEL,CMD) \
62 SCSI_CHECK_LOGGING(SCSI_LOG_ERROR_SHIFT, SCSI_LOG_ERROR_BITS, LEVEL,CMD);
63 #define SCSI_LOG_TIMEOUT(LEVEL,CMD) \
64 SCSI_CHECK_LOGGING(SCSI_LOG_TIMEOUT_SHIFT, SCSI_LOG_TIMEOUT_BITS, LEVEL,CMD);
65 #define SCSI_LOG_SCAN_BUS(LEVEL,CMD) \
66 SCSI_CHECK_LOGGING(SCSI_LOG_SCAN_SHIFT, SCSI_LOG_SCAN_BITS, LEVEL,CMD);
67 #define SCSI_LOG_MLQUEUE(LEVEL,CMD) \
68 SCSI_CHECK_LOGGING(SCSI_LOG_MLQUEUE_SHIFT, SCSI_LOG_MLQUEUE_BITS, LEVEL,CMD);
69 #define SCSI_LOG_MLCOMPLETE(LEVEL,CMD) \
70 SCSI_CHECK_LOGGING(SCSI_LOG_MLCOMPLETE_SHIFT, SCSI_LOG_MLCOMPLETE_BITS, LEVEL,CMD);
71 #define SCSI_LOG_LLQUEUE(LEVEL,CMD) \
72 SCSI_CHECK_LOGGING(SCSI_LOG_LLQUEUE_SHIFT, SCSI_LOG_LLQUEUE_BITS, LEVEL,CMD);
73 #define SCSI_LOG_LLCOMPLETE(LEVEL,CMD) \
74 SCSI_CHECK_LOGGING(SCSI_LOG_LLCOMPLETE_SHIFT, SCSI_LOG_LLCOMPLETE_BITS, LEVEL,CMD);
75 #define SCSI_LOG_HLQUEUE(LEVEL,CMD) \
76 SCSI_CHECK_LOGGING(SCSI_LOG_HLQUEUE_SHIFT, SCSI_LOG_HLQUEUE_BITS, LEVEL,CMD);
77 #define SCSI_LOG_HLCOMPLETE(LEVEL,CMD) \
78 SCSI_CHECK_LOGGING(SCSI_LOG_HLCOMPLETE_SHIFT, SCSI_LOG_HLCOMPLETE_BITS, LEVEL,CMD);
79 #define SCSI_LOG_IOCTL(LEVEL,CMD) \
80 SCSI_CHECK_LOGGING(SCSI_LOG_IOCTL_SHIFT, SCSI_LOG_IOCTL_BITS, LEVEL,CMD);
82 #endif /* _SCSI_LOGGING_H */