2 files changed, 30 insertions, 0 deletions
diff --git a/include/linux/firmware/intel/stratix10-smc.h b/include/linux/firmware/intel/stratix10-smc.h
index a718f853d457..ee80ca4bb0d0 100644
--- a/include/linux/firmware/intel/stratix10-smc.h
+++ b/include/linux/firmware/intel/stratix10-smc.h
@@ -467,6 +467,31 @@ INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FPGA_CONFIG_COMPLETED_WRITE)
         INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FIRMWARE_VERSION)
 
 /**
+ * SMC call protocol for Mailbox, starting FUNCID from 60
+ *
+ * Call register usage:
+ * a0 INTEL_SIP_SMC_MBOX_SEND_CMD
+ * a1 mailbox command code
+ * a2 physical address that contain mailbox command data (not include header)
+ * a3 mailbox command data size in word
+ * a4 set to 0 for CASUAL, set to 1 for URGENT
+ * a5 physical address for secure firmware to put response data
+ *    (not include header)
+ * a6 maximum size in word of physical address to store response data
+ * a7 not used
+ *
+ * Return status
+ * a0 INTEL_SIP_SMC_STATUS_OK, INTEL_SIP_SMC_STATUS_REJECTED or
+ *    INTEL_SIP_SMC_STATUS_ERROR
+ * a1 mailbox error code
+ * a2 response data length in word
+ * a3 not used
+ */
+#define INTEL_SIP_SMC_FUNCID_MBOX_SEND_CMD 60
+	#define INTEL_SIP_SMC_MBOX_SEND_CMD \
+	INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_MBOX_SEND_CMD)
+
+/**
  * Request INTEL_SIP_SMC_SVC_VERSION
  *
  * Sync call used to query the SIP SMC API Version
diff --git a/include/linux/firmware/intel/stratix10-svc-client.h b/include/linux/firmware/intel/stratix10-svc-client.h
index 0c16037fd08d..60ed82112680 100644
--- a/include/linux/firmware/intel/stratix10-svc-client.h
+++ b/include/linux/firmware/intel/stratix10-svc-client.h
@@ -118,6 +118,9 @@ struct stratix10_svc_chan;
  * @COMMAND_SMC_SVC_VERSION: Non-mailbox SMC SVC API Version,
  * return status is SVC_STATUS_OK
  *
+ * @COMMAND_MBOX_SEND_CMD: send generic mailbox command, return status is
+ * SVC_STATUS_OK or SVC_STATUS_ERROR
+ *
  * @COMMAND_RSU_DCMF_STATUS: query firmware for the DCMF status
  * return status is SVC_STATUS_OK or SVC_STATUS_ERROR
  *
@@ -164,6 +167,8 @@ enum stratix10_svc_command_code {
 	COMMAND_FCS_RANDOM_NUMBER_GEN,
 	/* for general status poll */
 	COMMAND_POLL_SERVICE_STATUS = 40,
+	/* for generic mailbox send command */
+	COMMAND_MBOX_SEND_CMD = 100,
 	/* Non-mailbox SMC Call */
 	COMMAND_SMC_SVC_VERSION = 200,
 };