mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-19 02:04:19 +08:00
fb6958a594
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>
27 lines
565 B
C
27 lines
565 B
C
#ifndef S390_SCHID_H
|
|
#define S390_SCHID_H
|
|
|
|
struct subchannel_id {
|
|
__u32 reserved:13;
|
|
__u32 ssid:2;
|
|
__u32 one:1;
|
|
__u32 sch_no:16;
|
|
} __attribute__ ((packed,aligned(4)));
|
|
|
|
|
|
/* Helper function for sane state of pre-allocated subchannel_id. */
|
|
static inline void
|
|
init_subchannel_id(struct subchannel_id *schid)
|
|
{
|
|
memset(schid, 0, sizeof(struct subchannel_id));
|
|
schid->one = 1;
|
|
}
|
|
|
|
static inline int
|
|
schid_equal(struct subchannel_id *schid1, struct subchannel_id *schid2)
|
|
{
|
|
return !memcmp(schid1, schid2, sizeof(struct subchannel_id));
|
|
}
|
|
|
|
#endif /* S390_SCHID_H */
|