[PATCH] s390: multiple subchannel sets support

Add support for multiple subchannel sets.  Works with arbitrary devices in
subchannel set 1 and is transparent to device drivers.  Although currently
only two subchannel sets are available, this will work with the architectured
maximum number of subchannel sets as well.

Signed-off-by: Cornelia Huck <cohuck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h
index 170083ca4349..44e4b4bb1c5a 100644
--- a/drivers/s390/cio/chsc.h
+++ b/drivers/s390/cio/chsc.h
@@ -5,6 +5,8 @@
 #define CHSC_SEI_ACC_LINKADDR     2
 #define CHSC_SEI_ACC_FULLLINKADDR 3
 
+#define CHSC_SDA_OC_MSS   0x2
+
 struct chsc_header {
         u16 length;
         u16 code;
@@ -64,6 +66,8 @@ extern int css_characteristics_avail;
 
 extern void *chsc_get_chp_desc(struct subchannel*, int);
 
+extern int chsc_enable_facility(int);
+
 #define to_channelpath(dev) container_of(dev, struct channel_path, dev)
 
 #endif