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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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29
drivers/s390/cio/ioasm.h
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@ -38,6 +38,35 @@ static inline int stsch(struct subchannel_id schid,
return ccode;
}
static inline int stsch_err(struct subchannel_id schid,
volatile struct schib *addr)
{
int ccode;
__asm__ __volatile__(
" lhi %0,%3\n"
" lr 1,%1\n"
" stsch 0(%2)\n"
"0: ipm %0\n"
" srl %0,28\n"
"1:\n"
#ifdef CONFIG_ARCH_S390X
".section __ex_table,\"a\"\n"
" .align 8\n"
" .quad 0b,1b\n"
".previous"
#else
".section __ex_table,\"a\"\n"
" .align 4\n"
" .long 0b,1b\n"
".previous"
#endif
: "=&d" (ccode)
: "d" (schid), "a" (addr), "K" (-EIO), "m" (*addr)
: "cc", "1" );
return ccode;
}
static inline int msch(struct subchannel_id schid,
volatile struct schib *addr)
{