1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/s390/cio/vfio_ccw_cp.h b/drivers/s390/cio/vfio_ccw_cp.h
new file mode 100644
index 000000000..54d26e242
--- /dev/null
+++ b/drivers/s390/cio/vfio_ccw_cp.h
@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * channel program interfaces
+ *
+ * Copyright IBM Corp. 2017
+ *
+ * Author(s): Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
+ *            Xiao Feng Ren <renxiaof@linux.vnet.ibm.com>
+ */
+
+#ifndef _VFIO_CCW_CP_H_
+#define _VFIO_CCW_CP_H_
+
+#include <asm/cio.h>
+#include <asm/scsw.h>
+
+#include "orb.h"
+#include "vfio_ccw_trace.h"
+
+/*
+ * Max length for ccw chain.
+ * XXX: Limit to 256, need to check more?
+ */
+#define CCWCHAIN_LEN_MAX	256
+
+/**
+ * struct channel_program - manage information for channel program
+ * @ccwchain_list: list head of ccwchains
+ * @orb: orb for the currently processed ssch request
+ * @mdev: the mediated device to perform page pinning/unpinning
+ * @initialized: whether this instance is actually initialized
+ *
+ * @ccwchain_list is the head of a ccwchain list, that contents the
+ * translated result of the guest channel program that pointed out by
+ * the iova parameter when calling cp_init.
+ */
+struct channel_program {
+	struct list_head ccwchain_list;
+	union orb orb;
+	bool initialized;
+	struct ccw1 *guest_cp;
+};
+
+int cp_init(struct channel_program *cp, union orb *orb);
+void cp_free(struct channel_program *cp);
+int cp_prefetch(struct channel_program *cp);
+union orb *cp_get_orb(struct channel_program *cp, u32 intparm, u8 lpm);
+void cp_update_scsw(struct channel_program *cp, union scsw *scsw);
+bool cp_iova_pinned(struct channel_program *cp, u64 iova, u64 length);
+
+#endif