summaryrefslogtreecommitdiffstats
path: root/include/asm-s390/chpid.h
diff options
context:
space:
mode:
authorPeter Oberparleiter <peter.oberparleiter@de.ibm.com>2007-04-27 16:01:31 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-04-27 16:01:39 +0200
commite5854a5839fa426a7873f038080f63587de5f1f1 (patch)
treec0a3705df925e652ff0694a47e7acb98e5f7d7bd /include/asm-s390/chpid.h
parentf5ba6c863617c15d22cce5f8666ff4c832773025 (diff)
downloadop-kernel-dev-e5854a5839fa426a7873f038080f63587de5f1f1.zip
op-kernel-dev-e5854a5839fa426a7873f038080f63587de5f1f1.tar.gz
[S390] cio: Channel-path configure function.
Add a new attribute to the channel-path sysfs directory through which channel-path configure operations can be triggered. Also listen for hardware events requesting channel-path configure operations and process them accordingly. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'include/asm-s390/chpid.h')
-rw-r--r--include/asm-s390/chpid.h53
1 files changed, 53 insertions, 0 deletions
diff --git a/include/asm-s390/chpid.h b/include/asm-s390/chpid.h
new file mode 100644
index 0000000..b203336
--- /dev/null
+++ b/include/asm-s390/chpid.h
@@ -0,0 +1,53 @@
+/*
+ * drivers/s390/cio/chpid.h
+ *
+ * Copyright IBM Corp. 2007
+ * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
+ */
+
+#ifndef _ASM_S390_CHPID_H
+#define _ASM_S390_CHPID_H _ASM_S390_CHPID_H
+
+#include <linux/string.h>
+#include <asm/types.h>
+#include <asm/cio.h>
+
+#define __MAX_CHPID 255
+
+struct chp_id {
+ u8 reserved1;
+ u8 cssid;
+ u8 reserved2;
+ u8 id;
+} __attribute__((packed));
+
+static inline void chp_id_init(struct chp_id *chpid)
+{
+ memset(chpid, 0, sizeof(struct chp_id));
+}
+
+static inline int chp_id_is_equal(struct chp_id *a, struct chp_id *b)
+{
+ return (a->id == b->id) && (a->cssid == b->cssid);
+}
+
+static inline void chp_id_next(struct chp_id *chpid)
+{
+ if (chpid->id < __MAX_CHPID)
+ chpid->id++;
+ else {
+ chpid->id = 0;
+ chpid->cssid++;
+ }
+}
+
+static inline int chp_id_is_valid(struct chp_id *chpid)
+{
+ return (chpid->cssid <= __MAX_CSSID);
+}
+
+
+#define chp_id_for_each(c) \
+ for (chp_id_init(c); chp_id_is_valid(c); chp_id_next(c))
+
+#endif /* _ASM_S390_CHPID_H */
OpenPOWER on IntegriCloud