[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>
diff --git a/drivers/s390/cio/ioasm.h b/drivers/s390/cio/ioasm.h
index 66c882e..62b0e2a 100644
--- a/drivers/s390/cio/ioasm.h
+++ b/drivers/s390/cio/ioasm.h
@@ -38,6 +38,35 @@
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)
{