firmware: stratix10-svc: extend SVC driver to get the firmware version

Extend Intel service layer driver to get the firmware version running at
FPGA device. Therefore FPGA manager driver, one of Intel service layer
driver's client, can decide whether to handle the newly added bitstream
authentication function based on the retrieved firmware version.

Acked-by: Moritz Fischr <mdf@kernel.org>
Signed-off-by: Richard Gong <richard.gong@intel.com>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
diff --git a/drivers/firmware/stratix10-svc.c b/drivers/firmware/stratix10-svc.c
index 29c0a61..4bd57a9 100644
--- a/drivers/firmware/stratix10-svc.c
+++ b/drivers/firmware/stratix10-svc.c
@@ -306,6 +306,7 @@
 		break;
 	case COMMAND_RSU_RETRY:
 	case COMMAND_RSU_MAX_RETRY:
+	case COMMAND_FIRMWARE_VERSION:
 		cb_data->status = BIT(SVC_STATUS_OK);
 		cb_data->kaddr1 = &res.a1;
 		break;
@@ -422,6 +423,11 @@
 			a1 = 0;
 			a2 = 0;
 			break;
+		case COMMAND_FIRMWARE_VERSION:
+			a0 = INTEL_SIP_SMC_FIRMWARE_VERSION;
+			a1 = 0;
+			a2 = 0;
+			break;
 		default:
 			pr_warn("it shouldn't happen\n");
 			break;
@@ -491,7 +497,8 @@
 			 */
 			if ((pdata->command == COMMAND_RSU_RETRY) ||
 			    (pdata->command == COMMAND_RSU_MAX_RETRY) ||
-				(pdata->command == COMMAND_RSU_NOTIFY)) {
+			    (pdata->command == COMMAND_RSU_NOTIFY) ||
+			    (pdata->command == COMMAND_FIRMWARE_VERSION)) {
 				cbdata->status =
 					BIT(SVC_STATUS_NO_SUPPORT);
 				cbdata->kaddr1 = NULL;
diff --git a/include/linux/firmware/intel/stratix10-smc.h b/include/linux/firmware/intel/stratix10-smc.h
index c3e5ab0..aad497a 100644
--- a/include/linux/firmware/intel/stratix10-smc.h
+++ b/include/linux/firmware/intel/stratix10-smc.h
@@ -321,8 +321,6 @@
 #define INTEL_SIP_SMC_ECC_DBE \
 	INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_ECC_DBE)
 
-#endif
-
 /**
  * Request INTEL_SIP_SMC_RSU_NOTIFY
  *
@@ -404,3 +402,22 @@
 #define INTEL_SIP_SMC_FUNCID_RSU_MAX_RETRY 18
 #define INTEL_SIP_SMC_RSU_MAX_RETRY \
 	INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_RSU_MAX_RETRY)
+
+/**
+ * Request INTEL_SIP_SMC_FIRMWARE_VERSION
+ *
+ * Sync call used to query the version of running firmware
+ *
+ * Call register usage:
+ * a0 INTEL_SIP_SMC_FIRMWARE_VERSION
+ * a1-a7 not used
+ *
+ * Return status:
+ * a0 INTEL_SIP_SMC_STATUS_OK or INTEL_SIP_SMC_STATUS_ERROR
+ * a1 running firmware version
+ */
+#define INTEL_SIP_SMC_FUNCID_FIRMWARE_VERSION 31
+#define INTEL_SIP_SMC_FIRMWARE_VERSION \
+        INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FIRMWARE_VERSION)
+
+#endif
diff --git a/include/linux/firmware/intel/stratix10-svc-client.h b/include/linux/firmware/intel/stratix10-svc-client.h
index 19781b0f..18c1841 100644
--- a/include/linux/firmware/intel/stratix10-svc-client.h
+++ b/include/linux/firmware/intel/stratix10-svc-client.h
@@ -104,6 +104,9 @@
  *
  * @COMMAND_RSU_DCMF_VERSION: query firmware for the DCMF version, return status
  * is SVC_STATUS_OK or SVC_STATUS_ERROR
+ *
+ * @COMMAND_FIRMWARE_VERSION: query running firmware version, return status
+ * is SVC_STATUS_OK or SVC_STATUS_ERROR
  */
 enum stratix10_svc_command_code {
 	COMMAND_NOOP = 0,
@@ -117,6 +120,7 @@
 	COMMAND_RSU_RETRY,
 	COMMAND_RSU_MAX_RETRY,
 	COMMAND_RSU_DCMF_VERSION,
+	COMMAND_FIRMWARE_VERSION,
 };
 
 /**