1 #ifndef _SCSI_LOGGING_H 2 #define _SCSI_LOGGING_H 3 4 5 /* 6 * This defines the scsi logging feature. It is a means by which the user 7 * can select how much information they get about various goings on, and it 8 * can be really useful for fault tracing. The logging word is divided into 9 * 8 nibbles, each of which describes a loglevel. The division of things is 10 * somewhat arbitrary, and the division of the word could be changed if it 11 * were really needed for any reason. The numbers below are the only place 12 * where these are specified. For a first go-around, 3 bits is more than 13 * enough, since this gives 8 levels of logging (really 7, since 0 is always 14 * off). Cutting to 2 bits might be wise at some point. 15 */ 16 17 #define SCSI_LOG_ERROR_SHIFT 0 18 #define SCSI_LOG_TIMEOUT_SHIFT 3 19 #define SCSI_LOG_SCAN_SHIFT 6 20 #define SCSI_LOG_MLQUEUE_SHIFT 9 21 #define SCSI_LOG_MLCOMPLETE_SHIFT 12 22 #define SCSI_LOG_LLQUEUE_SHIFT 15 23 #define SCSI_LOG_LLCOMPLETE_SHIFT 18 24 #define SCSI_LOG_HLQUEUE_SHIFT 21 25 #define SCSI_LOG_HLCOMPLETE_SHIFT 24 26 #define SCSI_LOG_IOCTL_SHIFT 27 27 28 #define SCSI_LOG_ERROR_BITS 3 29 #define SCSI_LOG_TIMEOUT_BITS 3 30 #define SCSI_LOG_SCAN_BITS 3 31 #define SCSI_LOG_MLQUEUE_BITS 3 32 #define SCSI_LOG_MLCOMPLETE_BITS 3 33 #define SCSI_LOG_LLQUEUE_BITS 3 34 #define SCSI_LOG_LLCOMPLETE_BITS 3 35 #define SCSI_LOG_HLQUEUE_BITS 3 36 #define SCSI_LOG_HLCOMPLETE_BITS 3 37 #define SCSI_LOG_IOCTL_BITS 3 38 39 extern unsigned int scsi_logging_level; 40 41 #ifdef CONFIG_SCSI_LOGGING 42 43 #define SCSI_LOG_LEVEL(SHIFT, BITS) \ 44 ((scsi_logging_level >> (SHIFT)) & ((1 << (BITS)) - 1)) 45 46 #define SCSI_CHECK_LOGGING(SHIFT, BITS, LEVEL, CMD) \ 47 do { \ 48 if (unlikely((SCSI_LOG_LEVEL(SHIFT, BITS)) > (LEVEL))) \ 49 do { \ 50 CMD; \ 51 } while (0); \ 52 } while (0) 53 #else 54 #define SCSI_LOG_LEVEL(SHIFT, BITS) 0 55 #define SCSI_CHECK_LOGGING(SHIFT, BITS, LEVEL, CMD) 56 #endif /* CONFIG_SCSI_LOGGING */ 57 58 /* 59 * These are the macros that are actually used throughout the code to 60 * log events. If logging isn't enabled, they are no-ops and will be 61 * completely absent from the user's code. 62 */ 63 #define SCSI_LOG_ERROR_RECOVERY(LEVEL,CMD) \ 64 SCSI_CHECK_LOGGING(SCSI_LOG_ERROR_SHIFT, SCSI_LOG_ERROR_BITS, LEVEL,CMD); 65 #define SCSI_LOG_TIMEOUT(LEVEL,CMD) \ 66 SCSI_CHECK_LOGGING(SCSI_LOG_TIMEOUT_SHIFT, SCSI_LOG_TIMEOUT_BITS, LEVEL,CMD); 67 #define SCSI_LOG_SCAN_BUS(LEVEL,CMD) \ 68 SCSI_CHECK_LOGGING(SCSI_LOG_SCAN_SHIFT, SCSI_LOG_SCAN_BITS, LEVEL,CMD); 69 #define SCSI_LOG_MLQUEUE(LEVEL,CMD) \ 70 SCSI_CHECK_LOGGING(SCSI_LOG_MLQUEUE_SHIFT, SCSI_LOG_MLQUEUE_BITS, LEVEL,CMD); 71 #define SCSI_LOG_MLCOMPLETE(LEVEL,CMD) \ 72 SCSI_CHECK_LOGGING(SCSI_LOG_MLCOMPLETE_SHIFT, SCSI_LOG_MLCOMPLETE_BITS, LEVEL,CMD); 73 #define SCSI_LOG_LLQUEUE(LEVEL,CMD) \ 74 SCSI_CHECK_LOGGING(SCSI_LOG_LLQUEUE_SHIFT, SCSI_LOG_LLQUEUE_BITS, LEVEL,CMD); 75 #define SCSI_LOG_LLCOMPLETE(LEVEL,CMD) \ 76 SCSI_CHECK_LOGGING(SCSI_LOG_LLCOMPLETE_SHIFT, SCSI_LOG_LLCOMPLETE_BITS, LEVEL,CMD); 77 #define SCSI_LOG_HLQUEUE(LEVEL,CMD) \ 78 SCSI_CHECK_LOGGING(SCSI_LOG_HLQUEUE_SHIFT, SCSI_LOG_HLQUEUE_BITS, LEVEL,CMD); 79 #define SCSI_LOG_HLCOMPLETE(LEVEL,CMD) \ 80 SCSI_CHECK_LOGGING(SCSI_LOG_HLCOMPLETE_SHIFT, SCSI_LOG_HLCOMPLETE_BITS, LEVEL,CMD); 81 #define SCSI_LOG_IOCTL(LEVEL,CMD) \ 82 SCSI_CHECK_LOGGING(SCSI_LOG_IOCTL_SHIFT, SCSI_LOG_IOCTL_BITS, LEVEL,CMD); 83 84 #endif /* _SCSI_LOGGING_H */ 85