[PATCH v4 3/4] vfio: zpci: defining the VFIO headers

[Matthew Rosato]

From: Pierre Morel <pmorel@xxxxxxxxxxxxx>

We define a new device region in vfio.h to be able to
get the ZPCI CLP information by reading this region from
userland.

We create a new file, vfio_zdev.h to define the structure
of the new region we defined in vfio.h

Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
Signed-off-by: Matthew Rosato <mjrosato@xxxxxxxxxxxxx>
---
 include/uapi/linux/vfio.h      |  1 +
 include/uapi/linux/vfio_zdev.h | 35 +++++++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)
 create mode 100644 include/uapi/linux/vfio_zdev.h

diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index 8f10748..8328c87 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -371,6 +371,7 @@ struct vfio_region_gfx_edid {
  * to do TLB invalidation on a GPU.
  */
 #define VFIO_REGION_SUBTYPE_IBM_NVLINK2_ATSD	(1)
+#define VFIO_REGION_SUBTYPE_ZDEV_CLP		(2)
 
 /*
  * The MSIX mappable capability informs that MSIX data of a BAR can be mmapped
diff --git a/include/uapi/linux/vfio_zdev.h b/include/uapi/linux/vfio_zdev.h
new file mode 100644
index 0000000..55e0d6d
--- /dev/null
+++ b/include/uapi/linux/vfio_zdev.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Region definition for ZPCI devices
+ *
+ * Copyright IBM Corp. 2019
+ *
+ * Author(s): Pierre Morel <pmorel@xxxxxxxxxxxxx>
+ */
+
+#ifndef _VFIO_ZDEV_H_
+#define _VFIO_ZDEV_H_
+
+#include <linux/types.h>
+
+/**
+ * struct vfio_region_zpci_info - ZPCI information.
+ *
+ */
+struct vfio_region_zpci_info {
+	__u64 dasm;
+	__u64 start_dma;
+	__u64 end_dma;
+	__u64 msi_addr;
+	__u64 flags;
+	__u16 pchid;
+	__u16 mui;
+	__u16 noi;
+	__u16 maxstbl;
+	__u8 version;
+	__u8 gid;
+#define VFIO_PCI_ZDEV_FLAGS_REFRESH 1
+	__u8 util_str[];
+} __packed;
+
+#endif
-- 
1.8.3.1