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-rw-r--r--drivers/tee/amdtee/amdtee_if.h183
1 files changed, 183 insertions, 0 deletions
diff --git a/drivers/tee/amdtee/amdtee_if.h b/drivers/tee/amdtee/amdtee_if.h
new file mode 100644
index 000000000000..ff48c3e47375
--- /dev/null
+++ b/drivers/tee/amdtee/amdtee_if.h
@@ -0,0 +1,183 @@
+/* SPDX-License-Identifier: MIT */
+
+/*
+ * Copyright 2019 Advanced Micro Devices, Inc.
+ */
+
+/*
+ * This file has definitions related to Host and AMD-TEE Trusted OS interface.
+ * These definitions must match the definitions on the TEE side.
+ */
+
+#ifndef AMDTEE_IF_H
+#define AMDTEE_IF_H
+
+#include <linux/types.h>
+
+/*****************************************************************************
+ ** TEE Param
+ ******************************************************************************/
+#define TEE_MAX_PARAMS 4
+
+/**
+ * struct memref - memory reference structure
+ * @buf_id: buffer ID of the buffer mapped by TEE_CMD_ID_MAP_SHARED_MEM
+ * @offset: offset in bytes from beginning of the buffer
+ * @size: data size in bytes
+ */
+struct memref {
+ u32 buf_id;
+ u32 offset;
+ u32 size;
+};
+
+struct value {
+ u32 a;
+ u32 b;
+};
+
+/*
+ * Parameters passed to open_session or invoke_command
+ */
+union tee_op_param {
+ struct memref mref;
+ struct value val;
+};
+
+struct tee_operation {
+ u32 param_types;
+ union tee_op_param params[TEE_MAX_PARAMS];
+};
+
+/* Must be same as in GP TEE specification */
+#define TEE_OP_PARAM_TYPE_NONE 0
+#define TEE_OP_PARAM_TYPE_VALUE_INPUT 1
+#define TEE_OP_PARAM_TYPE_VALUE_OUTPUT 2
+#define TEE_OP_PARAM_TYPE_VALUE_INOUT 3
+#define TEE_OP_PARAM_TYPE_INVALID 4
+#define TEE_OP_PARAM_TYPE_MEMREF_INPUT 5
+#define TEE_OP_PARAM_TYPE_MEMREF_OUTPUT 6
+#define TEE_OP_PARAM_TYPE_MEMREF_INOUT 7
+
+#define TEE_PARAM_TYPE_GET(t, i) (((t) >> ((i) * 4)) & 0xF)
+#define TEE_PARAM_TYPES(t0, t1, t2, t3) \
+ ((t0) | ((t1) << 4) | ((t2) << 8) | ((t3) << 12))
+
+/*****************************************************************************
+ ** TEE Commands
+ *****************************************************************************/
+
+/*
+ * The shared memory between rich world and secure world may be physically
+ * non-contiguous. Below structures are meant to describe a shared memory region
+ * via scatter/gather (sg) list
+ */
+
+/**
+ * struct tee_sg_desc - sg descriptor for a physically contiguous buffer
+ * @low_addr: [in] bits[31:0] of buffer's physical address. Must be 4KB aligned
+ * @hi_addr: [in] bits[63:32] of the buffer's physical address
+ * @size: [in] size in bytes (must be multiple of 4KB)
+ */
+struct tee_sg_desc {
+ u32 low_addr;
+ u32 hi_addr;
+ u32 size;
+};
+
+/**
+ * struct tee_sg_list - structure describing a scatter/gather list
+ * @count: [in] number of sg descriptors
+ * @size: [in] total size of all buffers in the list. Must be multiple of 4KB
+ * @buf: [in] list of sg buffer descriptors
+ */
+#define TEE_MAX_SG_DESC 64
+struct tee_sg_list {
+ u32 count;
+ u32 size;
+ struct tee_sg_desc buf[TEE_MAX_SG_DESC];
+};
+
+/**
+ * struct tee_cmd_map_shared_mem - command to map shared memory
+ * @buf_id: [out] return buffer ID value
+ * @sg_list: [in] list describing memory to be mapped
+ */
+struct tee_cmd_map_shared_mem {
+ u32 buf_id;
+ struct tee_sg_list sg_list;
+};
+
+/**
+ * struct tee_cmd_unmap_shared_mem - command to unmap shared memory
+ * @buf_id: [in] buffer ID of memory to be unmapped
+ */
+struct tee_cmd_unmap_shared_mem {
+ u32 buf_id;
+};
+
+/**
+ * struct tee_cmd_load_ta - load Trusted Application (TA) binary into TEE
+ * @low_addr: [in] bits [31:0] of the physical address of the TA binary
+ * @hi_addr: [in] bits [63:32] of the physical address of the TA binary
+ * @size: [in] size of TA binary in bytes
+ * @ta_handle: [out] return handle of the loaded TA
+ */
+struct tee_cmd_load_ta {
+ u32 low_addr;
+ u32 hi_addr;
+ u32 size;
+ u32 ta_handle;
+};
+
+/**
+ * struct tee_cmd_unload_ta - command to unload TA binary from TEE environment
+ * @ta_handle: [in] handle of the loaded TA to be unloaded
+ */
+struct tee_cmd_unload_ta {
+ u32 ta_handle;
+};
+
+/**
+ * struct tee_cmd_open_session - command to call TA_OpenSessionEntryPoint in TA
+ * @ta_handle: [in] handle of the loaded TA
+ * @session_info: [out] pointer to TA allocated session data
+ * @op: [in/out] operation parameters
+ * @return_origin: [out] origin of return code after TEE processing
+ */
+struct tee_cmd_open_session {
+ u32 ta_handle;
+ u32 session_info;
+ struct tee_operation op;
+ u32 return_origin;
+};
+
+/**
+ * struct tee_cmd_close_session - command to call TA_CloseSessionEntryPoint()
+ * in TA
+ * @ta_handle: [in] handle of the loaded TA
+ * @session_info: [in] pointer to TA allocated session data
+ */
+struct tee_cmd_close_session {
+ u32 ta_handle;
+ u32 session_info;
+};
+
+/**
+ * struct tee_cmd_invoke_cmd - command to call TA_InvokeCommandEntryPoint() in
+ * TA
+ * @ta_handle: [in] handle of the loaded TA
+ * @cmd_id: [in] TA command ID
+ * @session_info: [in] pointer to TA allocated session data
+ * @op: [in/out] operation parameters
+ * @return_origin: [out] origin of return code after TEE processing
+ */
+struct tee_cmd_invoke_cmd {
+ u32 ta_handle;
+ u32 cmd_id;
+ u32 session_info;
+ struct tee_operation op;
+ u32 return_origin;
+};
+
+#endif /*AMDTEE_IF_H*/