1 files changed, 67 insertions, 0 deletions
diff --git a/include/uapi/linux/aspeed-mctp.h b/include/uapi/linux/aspeed-mctp.h
new file mode 100644
index 000000000000..9819b6029d19
--- /dev/null
+++ b/include/uapi/linux/aspeed-mctp.h
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2020 Intel Corporation */
+
+#ifndef _UAPI_LINUX_ASPEED_MCTP_H
+#define _UAPI_LINUX_ASPEED_MCTP_H
+
+#include <linux/ioctl.h>
+#include <linux/types.h>
+
+/*
+ * aspeed-mctp is a simple device driver exposing a read/write interface:
+ *  +----------------------+
+ *  | PCIe VDM Header      | 16 bytes (Big Endian)
+ *  +----------------------+
+ *  | MCTP Message Payload | 64/128/256/512 bytes (Big Endian)
+ *  +----------------------+
+ *
+ * MCTP packet description can be found in DMTF DSP0238,
+ * MCTP PCIe VDM Transport Specification.
+ */
+
+#define ASPEED_MCTP_PCIE_VDM_HDR_SIZE 16
+
+/*
+ * uevents generated by aspeed-mctp driver
+ */
+#define ASPEED_MCTP_READY "PCIE_READY"
+
+/*
+ * MCTP operations
+ * @ASPEED_MCTP_IOCTL_FILTER_EID: enable/disable filter incoming packets based
+ * on Endpoint ID (BROKEN)
+ * @ASPEED_MCTP_IOCTL_GET_BDF: read PCI bus/device/function of MCTP Controller
+ * @ASPEED_MCTP_IOCTL_GET_MEDIUM_ID: read MCTP physical medium identifier
+ * related to PCIe revision
+ * @ASPEED_MCTP_IOCTL_GET_MTU: read max transmission unit (in bytes)
+ */
+
+struct aspeed_mctp_filter_eid {
+	__u8 eid;
+	bool enable;
+};
+
+struct aspeed_mctp_get_bdf {
+	__u16 bdf;
+};
+
+struct aspeed_mctp_get_medium_id {
+	__u8 medium_id;
+};
+
+struct aspeed_mctp_get_mtu {
+	__u8 mtu;
+};
+
+#define ASPEED_MCTP_IOCTL_BASE	0x4d
+
+#define ASPEED_MCTP_IOCTL_FILTER_EID \
+	_IOW(ASPEED_MCTP_IOCTL_BASE, 0, struct aspeed_mctp_filter_eid)
+#define ASPEED_MCTP_IOCTL_GET_BDF \
+	_IOR(ASPEED_MCTP_IOCTL_BASE, 1, struct aspeed_mctp_get_bdf)
+#define ASPEED_MCTP_IOCTL_GET_MEDIUM_ID \
+	_IOR(ASPEED_MCTP_IOCTL_BASE, 2, struct aspeed_mctp_get_medium_id)
+#define ASPEED_MCTP_IOCTL_GET_MTU \
+	_IOR(ASPEED_MCTP_IOCTL_BASE, 3, struct aspeed_mctp_get_mtu)
+
+#endif /* _UAPI_LINUX_ASPEED_MCTP_H */