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authorSebastian Ott <sebott@linux.vnet.ibm.com>2010-10-25 16:10:34 +0200
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-10-25 16:10:19 +0200
commit585b954e1f2fa325d425b0786e4525ac7c9ae575 (patch)
treee79174793782e81820c7f6896284f7e341bf9e9d /arch/s390/include
parenteb4f5d93d70458ea644e0f46737f0bcf87280e83 (diff)
downloadlinux-linaro-android-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/include')
-rw-r--r--arch/s390/include/asm/ccwdev.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/s390/include/asm/ccwdev.h b/arch/s390/include/asm/ccwdev.h
index f3ba0fa98de..e8501115eca 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 *);