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| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2010-10-25 16:10:34 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-10-25 16:10:19 +0200 |
| commit | 585b954e1f2fa325d425b0786e4525ac7c9ae575 (patch) | |
| tree | e79174793782e81820c7f6896284f7e341bf9e9d /arch/s390 | |
| parent | eb4f5d93d70458ea644e0f46737f0bcf87280e83 (diff) | |
| download | linux-585b954e1f2fa325d425b0786e4525ac7c9ae575.tar.gz | |
[S390] cio: notify drivers of channel path events
This patch adds a notification mechanism to inform ccw drivers
about changes to channel paths, which occured while the device
is online.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/ccwdev.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/s390/include/asm/ccwdev.h b/arch/s390/include/asm/ccwdev.h index f3ba0fa98de6..e8501115eca8 100644 --- a/arch/s390/include/asm/ccwdev.h +++ b/arch/s390/include/asm/ccwdev.h @@ -92,6 +92,16 @@ struct ccw_device { }; /* + * Possible events used by the path_event notifier. + */ +#define PE_NONE 0x0 +#define PE_PATH_GONE 0x1 /* A path is no longer available. */ +#define PE_PATH_AVAILABLE 0x2 /* A path has become available and + was successfully verified. */ +#define PE_PATHGROUP_ESTABLISHED 0x4 /* A pathgroup was reset and had + to be established again. */ + +/* * Possible CIO actions triggered by the unit check handler. */ enum uc_todo { @@ -109,6 +119,7 @@ enum uc_todo { * @set_online: called when setting device online * @set_offline: called when setting device offline * @notify: notify driver of device state changes + * @path_event: notify driver of channel path events * @shutdown: called at device shutdown * @prepare: prepare for pm state transition * @complete: undo work done in @prepare @@ -127,6 +138,7 @@ struct ccw_driver { int (*set_online) (struct ccw_device *); int (*set_offline) (struct ccw_device *); int (*notify) (struct ccw_device *, int); + void (*path_event) (struct ccw_device *, int *); void (*shutdown) (struct ccw_device *); int (*prepare) (struct ccw_device *); void (*complete) (struct ccw_device *); |