1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _SCSI_LOGGING_H
3 #define _SCSI_LOGGING_H
7 * This defines the scsi logging feature. It is a means by which the user can
8 * select how much information they get about various goings on, and it can be
9 * really useful for fault tracing. The logging word is divided into 10 3-bit
10 * bitfields, 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))) \
55 #define SCSI_LOG_LEVEL(SHIFT, BITS) 0
56 #define SCSI_CHECK_LOGGING(SHIFT, BITS, LEVEL, CMD) do { } while (0)
57 #endif /* CONFIG_SCSI_LOGGING */
60 * These are the macros that are actually used throughout the code to
61 * log events. If logging isn't enabled, they are no-ops and will be
62 * completely absent from the user's code.
64 #define SCSI_LOG_ERROR_RECOVERY(LEVEL,CMD) \
65 SCSI_CHECK_LOGGING(SCSI_LOG_ERROR_SHIFT, SCSI_LOG_ERROR_BITS, LEVEL,CMD);
66 #define SCSI_LOG_TIMEOUT(LEVEL,CMD) \
67 SCSI_CHECK_LOGGING(SCSI_LOG_TIMEOUT_SHIFT, SCSI_LOG_TIMEOUT_BITS, LEVEL,CMD);
68 #define SCSI_LOG_SCAN_BUS(LEVEL,CMD) \
69 SCSI_CHECK_LOGGING(SCSI_LOG_SCAN_SHIFT, SCSI_LOG_SCAN_BITS, LEVEL,CMD);
70 #define SCSI_LOG_MLQUEUE(LEVEL,CMD) \
71 SCSI_CHECK_LOGGING(SCSI_LOG_MLQUEUE_SHIFT, SCSI_LOG_MLQUEUE_BITS, LEVEL,CMD);
72 #define SCSI_LOG_MLCOMPLETE(LEVEL,CMD) \
73 SCSI_CHECK_LOGGING(SCSI_LOG_MLCOMPLETE_SHIFT, SCSI_LOG_MLCOMPLETE_BITS, LEVEL,CMD);
74 #define SCSI_LOG_LLQUEUE(LEVEL,CMD) \
75 SCSI_CHECK_LOGGING(SCSI_LOG_LLQUEUE_SHIFT, SCSI_LOG_LLQUEUE_BITS, LEVEL,CMD);
76 #define SCSI_LOG_LLCOMPLETE(LEVEL,CMD) \
77 SCSI_CHECK_LOGGING(SCSI_LOG_LLCOMPLETE_SHIFT, SCSI_LOG_LLCOMPLETE_BITS, LEVEL,CMD);
78 #define SCSI_LOG_HLQUEUE(LEVEL,CMD) \
79 SCSI_CHECK_LOGGING(SCSI_LOG_HLQUEUE_SHIFT, SCSI_LOG_HLQUEUE_BITS, LEVEL,CMD);
80 #define SCSI_LOG_HLCOMPLETE(LEVEL,CMD) \
81 SCSI_CHECK_LOGGING(SCSI_LOG_HLCOMPLETE_SHIFT, SCSI_LOG_HLCOMPLETE_BITS, LEVEL,CMD);
82 #define SCSI_LOG_IOCTL(LEVEL,CMD) \
83 SCSI_CHECK_LOGGING(SCSI_LOG_IOCTL_SHIFT, SCSI_LOG_IOCTL_BITS, LEVEL,CMD);
85 #endif /* _SCSI_LOGGING_H */