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[S390] cio: notify drivers of channel path events

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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>
This commit is contained in:
Sebastian Ott
2010-10-25 16:10:34 +02:00
committed by Martin Schwidefsky
parent eb4f5d93d7
commit 585b954e1f
5 changed files with 75 additions and 8 deletions
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7
drivers/s390/cio/io_sch.h
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@@ -151,8 +151,11 @@ struct ccw_device_private {
struct subchannel_id schid; /* subchannel number */
struct ccw_request req; /* internal I/O request */
int iretry;
u8 pgid_valid_mask; /* mask of valid PGIDs */
u8 pgid_todo_mask; /* mask of PGIDs to be adjusted */
u8 pgid_valid_mask; /* mask of valid PGIDs */
u8 pgid_todo_mask; /* mask of PGIDs to be adjusted */
u8 pgid_reset_mask; /* mask of PGIDs which were reset */
u8 path_gone_mask; /* mask of paths, that became unavailable */
u8 path_new_mask; /* mask of paths, that became available */
struct {
unsigned int fast:1; /* post with "channel end" */
unsigned int repall:1; /* report every interrupt status */