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
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#define S390_SCHID_H
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struct subchannel_id {
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__u32 reserved:13;
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__u32 ssid:2;
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__u32 one:1;
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__u32 sch_no:16;
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} __attribute__ ((packed,aligned(4)));
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/* Helper function for sane state of pre-allocated subchannel_id. */
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static inline void
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init_subchannel_id(struct subchannel_id *schid)
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{
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memset(schid, 0, sizeof(struct subchannel_id));
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schid->one = 1;
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}
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static inline int
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schid_equal(struct subchannel_id *schid1, struct subchannel_id *schid2)
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{
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return !memcmp(schid1, schid2, sizeof(struct subchannel_id));
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}
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#endif /* S390_SCHID_H */
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