drm/amdgpu: add RAP TA header file

The RAP TA contains tests used to verify if
RAP(Register Access Policy), or otherwise known
as Security Policy is applied correctly
by PSP BL&TOS.

The RAP test is a measure to ensure that we reduce
the avenue of complexity and mistakes when dealing
with RAP in post-si execution, where debugging failures
related to RAP is quite difficult and expensive.

v2: add introduction for RAP TA

Signed-off-by: Wenhui Sheng <[e-mail]>
Reviewed-by: Guchun Chen <[e-mail]>
Reviewed-by: Hawking Zhang <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/amdgpu/ta_rap_if.h

···
+/*
+ * Copyright 2020 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#ifndef _TA_RAP_IF_H
+#define _TA_RAP_IF_H
+
+/* Responses have bit 31 set */
+#define RSP_ID_MASK (1U << 31)
+#define RSP_ID(cmdId) (((uint32_t)(cmdId)) | RSP_ID_MASK)
+
+enum ta_rap_status {
+	TA_RAP_STATUS__SUCCESS                              = 1,
+	TA_RAP_STATUS__ERROR_GENERIC_FAILURE                = 2,
+	TA_RAP_STATUS__ERROR_CMD_NOT_SUPPORTED              = 3,
+	TA_RAP_STATUS__ERROR_INVALID_VALIDATION_METHOD      = 4,
+	TA_RAP_STATUS__ERROR_NULL_POINTER                   = 5,
+	TA_RAP_STATUS__ERROR_NOT_INITIALIZED                = 6,
+	TA_RAP_STATUS__ERROR_VALIDATION_FAILED              = 7,
+	TA_RAP_STATUS__ERROR_ASIC_NOT_SUPPORTED             = 8,
+	TA_RAP_STATUS__ERROR_OPERATION_NOT_PERMISSABLE      = 9,
+	TA_RAP_STATUS__ERROR_ALREADY_INIT                   = 10,
+};
+
+enum ta_rap_cmd {
+	TA_CMD_RAP__INITIALIZE              = 1,
+	TA_CMD_RAP__VALIDATE_L0             = 2,
+};
+
+enum ta_rap_validation_method {
+	METHOD_A           = 1,
+};
+
+struct ta_rap_cmd_input_data {
+	uint8_t reserved[8];
+};
+
+struct ta_rap_cmd_output_data {
+	uint32_t    last_subsection;
+	uint32_t    num_total_validate;
+	uint32_t    num_valid;
+	uint32_t    last_validate_addr;
+	uint32_t    last_validate_val;
+	uint32_t    last_validate_val_exptd;
+};
+
+union ta_rap_cmd_input {
+	struct ta_rap_cmd_input_data input;
+};
+
+union ta_rap_cmd_output {
+	struct ta_rap_cmd_output_data output;
+};
+
+struct ta_rap_shared_memory {
+	uint32_t                    cmd_id;
+	uint32_t                    validation_method_id;
+	uint32_t                    resp_id;
+	enum ta_rap_status          rap_status;
+	union ta_rap_cmd_input      rap_in_message;
+	union ta_rap_cmd_output     rap_out_message;
+	uint8_t                     reserved[64];
+};
+
+#endif  // #define _TA_RAP_IF_H