linux-imx

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _SCSI_LOGGING_H

#define _SCSI_LOGGING_H

​

​

/*

 * This defines the scsi logging feature.  It is a means by which the user can

 * select how much information they get about various goings on, and it can be

 * really useful for fault tracing.  The logging word is divided into 10 3-bit

 * bitfields, each of which describes a loglevel.  The division of things is

 * somewhat arbitrary, and the division of the word could be changed if it

 * were really needed for any reason.  The numbers below are the only place

 * where these are specified.  For a first go-around, 3 bits is more than

 * enough, since this gives 8 levels of logging (really 7, since 0 is always

 * off).  Cutting to 2 bits might be wise at some point.

 */

​

#define SCSI_LOG_ERROR_SHIFT              0

#define SCSI_LOG_TIMEOUT_SHIFT            3

#define SCSI_LOG_SCAN_SHIFT               6

#define SCSI_LOG_MLQUEUE_SHIFT            9

#define SCSI_LOG_MLCOMPLETE_SHIFT         12

#define SCSI_LOG_LLQUEUE_SHIFT            15

#define SCSI_LOG_LLCOMPLETE_SHIFT         18

#define SCSI_LOG_HLQUEUE_SHIFT            21

#define SCSI_LOG_HLCOMPLETE_SHIFT         24

#define SCSI_LOG_IOCTL_SHIFT              27

​

#define SCSI_LOG_ERROR_BITS               3

#define SCSI_LOG_TIMEOUT_BITS             3

#define SCSI_LOG_SCAN_BITS                3

#define SCSI_LOG_MLQUEUE_BITS             3

#define SCSI_LOG_MLCOMPLETE_BITS          3

#define SCSI_LOG_LLQUEUE_BITS             3

#define SCSI_LOG_LLCOMPLETE_BITS          3

#define SCSI_LOG_HLQUEUE_BITS             3

#define SCSI_LOG_HLCOMPLETE_BITS          3

#define SCSI_LOG_IOCTL_BITS               3

​

extern unsigned int scsi_logging_level;

​

#ifdef CONFIG_SCSI_LOGGING

​

#define SCSI_LOG_LEVEL(SHIFT, BITS)             \

        ((scsi_logging_level >> (SHIFT)) & ((1 << (BITS)) - 1))

​

#define SCSI_CHECK_LOGGING(SHIFT, BITS, LEVEL, CMD)     \

do {                                \

        if (unlikely((SCSI_LOG_LEVEL(SHIFT, BITS)) > (LEVEL)))  \

        do {                        \

            CMD;                    \

        } while (0);                    \

} while (0)

#else

#define SCSI_LOG_LEVEL(SHIFT, BITS) 0

#define SCSI_CHECK_LOGGING(SHIFT, BITS, LEVEL, CMD)

#endif /* CONFIG_SCSI_LOGGING */

​

/*

 * These are the macros that are actually used throughout the code to

 * log events.  If logging isn't enabled, they are no-ops and will be

 * completely absent from the user's code.

 */