1 files changed, 25 insertions, 0 deletions

diff --git a/arch/s390/include/asm/isc.h b/arch/s390/include/asm/isc.h
new file mode 100644
index 000000000000..34bb8916db4f
--- /dev/null
+++ b/arch/s390/include/asm/isc.h
@@ -0,0 +1,25 @@
+#ifndef _ASM_S390_ISC_H
+#define _ASM_S390_ISC_H
+
+#include <linux/types.h>
+
+/*
+ * I/O interruption subclasses used by drivers.
+ * Please add all used iscs here so that it is possible to distribute
+ * isc usage between drivers.
+ * Reminder: 0 is highest priority, 7 lowest.
+ */
+#define MAX_ISC 7
+
+/* Regular I/O interrupts. */
+#define IO_SCH_ISC 3                    /* regular I/O subchannels */
+#define CONSOLE_ISC 1                   /* console I/O subchannel */
+#define CHSC_SCH_ISC 7                  /* CHSC subchannels */
+/* Adapter interrupts. */
+#define QDIO_AIRQ_ISC IO_SCH_ISC        /* I/O subchannel in qdio mode */
+
+/* Functions for registration of I/O interruption subclasses */
+void isc_register(unsigned int isc);
+void isc_unregister(unsigned int isc);
+
+#endif /* _ASM_S390_ISC_H */