1 files changed, 156 insertions, 0 deletions
diff --git a/lib/intel_allocator_msgchannel.h b/lib/intel_allocator_msgchannel.h
new file mode 100644
index 00000000..ac6edfb9
--- /dev/null
+++ b/lib/intel_allocator_msgchannel.h
@@ -0,0 +1,156 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#ifndef __INTEL_ALLOCATOR_MSGCHANNEL_H__
+#define __INTEL_ALLOCATOR_MSGCHANNEL_H__
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdint.h>
+
+enum reqtype {
+	REQ_STOP,
+	REQ_OPEN,
+	REQ_OPEN_AS,
+	REQ_CLOSE,
+	REQ_ADDRESS_RANGE,
+	REQ_ALLOC,
+	REQ_FREE,
+	REQ_IS_ALLOCATED,
+	REQ_RESERVE,
+	REQ_UNRESERVE,
+	REQ_RESERVE_IF_NOT_ALLOCATED,
+	REQ_IS_RESERVED,
+};
+
+enum resptype {
+	RESP_OPEN,
+	RESP_OPEN_AS,
+	RESP_CLOSE,
+	RESP_ADDRESS_RANGE,
+	RESP_ALLOC,
+	RESP_FREE,
+	RESP_IS_ALLOCATED,
+	RESP_RESERVE,
+	RESP_UNRESERVE,
+	RESP_IS_RESERVED,
+	RESP_RESERVE_IF_NOT_ALLOCATED,
+};
+
+struct alloc_req {
+	enum reqtype request_type;
+
+	/* Common */
+	pid_t tid;
+	uint64_t allocator_handle;
+
+	union {
+		struct {
+			int fd;
+			uint32_t ctx;
+			uint32_t vm;
+			uint64_t start;
+			uint64_t end;
+			uint8_t allocator_type;
+			uint8_t allocator_strategy;
+		} open;
+
+		struct {
+			uint32_t new_vm;
+		} open_as;
+
+		struct {
+			uint32_t handle;
+			uint64_t size;
+			uint64_t alignment;
+		} alloc;
+
+		struct {
+			uint32_t handle;
+		} free;
+
+		struct {
+			uint32_t handle;
+			uint64_t size;
+			uint64_t offset;
+		} is_allocated;
+
+		struct {
+			uint32_t handle;
+			uint64_t start;
+			uint64_t end;
+		} reserve, unreserve;
+
+		struct {
+			uint64_t start;
+			uint64_t end;
+		} is_reserved;
+
+	};
+};
+
+struct alloc_resp {
+	enum resptype response_type;
+	pid_t tid;
+
+	union {
+		struct {
+			uint64_t allocator_handle;
+		} open, open_as;
+
+		struct {
+			bool is_empty;
+		} close;
+
+		struct {
+			uint64_t start;
+			uint64_t end;
+			uint8_t direction;
+		} address_range;
+
+		struct {
+			uint64_t offset;
+		} alloc;
+
+		struct {
+			bool freed;
+		} free;
+
+		struct {
+			bool allocated;
+		} is_allocated;
+
+		struct {
+			bool reserved;
+		} reserve, is_reserved;
+
+		struct {
+			bool unreserved;
+		} unreserve;
+
+		struct {
+			bool allocated;
+			bool reserved;
+		} reserve_if_not_allocated;
+	};
+};
+
+struct msg_channel {
+	void *priv;
+	void (*init)(struct msg_channel *channel);
+	void (*deinit)(struct msg_channel *channel);
+	int (*send_req)(struct msg_channel *channel, struct alloc_req *request);
+	int (*recv_req)(struct msg_channel *channel, struct alloc_req *request);
+	int (*send_resp)(struct msg_channel *channel, struct alloc_resp *response);
+	int (*recv_resp)(struct msg_channel *channel, struct alloc_resp *response);
+};
+
+enum msg_channel_type {
+	CHANNEL_SYSVIPC_MSGQUEUE
+};
+
+struct msg_channel *intel_allocator_get_msgchannel(enum msg_channel_type type);
+
+#endif