1 files changed, 56 insertions, 0 deletions

diff --git a/arch/s390/include/asm/chpid.h b/arch/s390/include/asm/chpid.h
new file mode 100644
index 000000000000..dfe3c7f3439a
--- /dev/null
+++ b/arch/s390/include/asm/chpid.h
@@ -0,0 +1,56 @@
+/*
+ *  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>
+
+#define __MAX_CHPID 255
+
+struct chp_id {
+        u8 reserved1;
+        u8 cssid;
+        u8 reserved2;
+        u8 id;
+} __attribute__((packed));
+
+#ifdef __KERNEL__
+#include <asm/cio.h>
+
+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 /* __KERNEL */
+
+#endif /* _ASM_S390_CHPID_H */