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[PATCH] s390: multiple subchannel sets support

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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>
This commit is contained in:
Cornelia Huck
2006-01-06 00:19:25 -08:00
committed by Linus Torvalds
parent 678a395b35
commit fb6958a594
16 changed files with 354 additions and 165 deletions
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2
drivers/s390/cio/css.h
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@@ -77,6 +77,7 @@ struct ccw_device_private {
unsigned long registered;
__u16 devno; /* device number */
__u16 sch_no; /* subchannel number */
__u8 ssid; /* subchannel set id */
__u8 imask; /* lpm mask for SNID/SID/SPGID */
int iretry; /* retry counter SNID/SID/SPGID */
struct {
@@ -135,6 +136,7 @@ extern int css_init_done;
extern int for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *);
#define __MAX_SUBCHANNEL 65535
#define __MAX_SSID 3
#define __MAX_CHPID 255
#define __MAX_CSSID 0