drm/amd/pm: export a function amdgpu_smu_ras_send_msg to allow send msg directly

provide a interface that allows ras client send msg to smu/pmfw directly.

Signed-off-by: Yang Wang <[e-mail]>
Signed-off-by: YiPeng Chai <[e-mail]>
Reviewed-by: Tao Zhou <[e-mail]>
Reviewed-by: Hawking Zhang <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c

···
 	return true;
 }
 
+int amdgpu_smu_ras_send_msg(struct amdgpu_device *adev, enum smu_message_type msg,
+			    uint32_t param, uint32_t *read_arg)
+{
+	struct smu_context *smu = adev->powerplay.pp_handle;
+	int ret = -EOPNOTSUPP;
+
+	if (smu->ppt_funcs && smu->ppt_funcs->ras_send_msg)
+		ret = smu->ppt_funcs->ras_send_msg(smu, msg, param, read_arg);
+
+	return ret;
+}
 
 static int smu_sys_get_pp_table(void *handle,
 				char **table)

drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h

···
 	 */
 	ssize_t (*get_xcp_metrics)(struct smu_context *smu, int xcp_id,
 				   void *table);
+	/**
+	 * @ras_send_msg: Send a message with a parameter from Ras
+	 * &msg: Type of message.
+	 * &param: Message parameter.
+	 * &read_arg: SMU response (optional).
+	 */
+	int (*ras_send_msg)(struct smu_context *smu,
+			    enum smu_message_type msg, uint32_t param, uint32_t *read_arg);
+
 };
 
 typedef enum {
···
 ssize_t smu_get_pm_policy_info(struct smu_context *smu,
 			       enum pp_pm_policy p_type, char *sysbuf);
 
+int amdgpu_smu_ras_send_msg(struct amdgpu_device *adev, enum smu_message_type msg,
+			    uint32_t param, uint32_t *readarg);
 #endif
 
 void smu_feature_cap_set(struct smu_context *smu, enum smu_feature_cap_id fea_id);

drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c

···
 	return ret;
 }
 
+static int smu_v13_0_6_ras_send_msg(struct smu_context *smu, enum smu_message_type msg, uint32_t param, uint32_t *read_arg)
+{
+	int ret;
+
+	switch (msg) {
+	case SMU_MSG_QueryValidMcaCount:
+	case SMU_MSG_QueryValidMcaCeCount:
+	case SMU_MSG_McaBankDumpDW:
+	case SMU_MSG_McaBankCeDumpDW:
+	case SMU_MSG_ClearMcaOnRead:
+		ret = smu_cmn_send_smc_msg_with_param(smu, msg, param, read_arg);
+		break;
+	default:
+		ret = -EPERM;
+	}
+
+	return ret;
+}
 
 static int smu_v13_0_6_post_init(struct smu_context *smu)
 {
···
 	.reset_sdma = smu_v13_0_6_reset_sdma,
 	.dpm_reset_vcn = smu_v13_0_6_reset_vcn,
 	.post_init = smu_v13_0_6_post_init,
+	.ras_send_msg = smu_v13_0_6_ras_send_msg,
 };
 
 void smu_v13_0_6_set_ppt_funcs(struct smu_context *smu)