firmware: stratix10-svc: extend svc to support new RSU features

Extend Intel Stratix10 service layer driver to support new RSU DCMF
versions and max retry parameter.

DCMF = Decision Configuration Management Firmware. The max retry parameter
is the maximum times the images is allowed to reload itself before giving
up and starting RSU failover flow.

Signed-off-by: Richard Gong <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/firmware/stratix10-svc.c

···
 		cb_data->status = BIT(SVC_STATUS_COMPLETED);
 		break;
 	case COMMAND_RSU_RETRY:
+	case COMMAND_RSU_MAX_RETRY:
 		cb_data->status = BIT(SVC_STATUS_OK);
 		cb_data->kaddr1 = &res.a1;
+		break;
+	case COMMAND_RSU_DCMF_VERSION:
+		cb_data->status = BIT(SVC_STATUS_OK);
+		cb_data->kaddr1 = &res.a1;
+		cb_data->kaddr2 = &res.a2;
 		break;
 	default:
 		pr_warn("it shouldn't happen\n");
···
 			a1 = 0;
 			a2 = 0;
 			break;
+		case COMMAND_RSU_MAX_RETRY:
+			a0 = INTEL_SIP_SMC_RSU_MAX_RETRY;
+			a1 = 0;
+			a2 = 0;
+			break;
+		case COMMAND_RSU_DCMF_VERSION:
+			a0 = INTEL_SIP_SMC_RSU_DCMF_VERSION;
+			a1 = 0;
+			a2 = 0;
+			break;
 		default:
 			pr_warn("it shouldn't happen\n");
 			break;
···
 			 * doesn't support RSU notify or retry
 			 */
 			if ((pdata->command == COMMAND_RSU_RETRY) ||
+			    (pdata->command == COMMAND_RSU_MAX_RETRY) ||
 				(pdata->command == COMMAND_RSU_NOTIFY)) {
 				cbdata->status =
 					BIT(SVC_STATUS_NO_SUPPORT);

include/linux/firmware/intel/stratix10-smc.h

···
 #define INTEL_SIP_SMC_FUNCID_RSU_RETRY_COUNTER 15
 #define INTEL_SIP_SMC_RSU_RETRY_COUNTER \
 	INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_RSU_RETRY_COUNTER)
+
+/**
+ * Request INTEL_SIP_SMC_RSU_DCMF_VERSION
+ *
+ * Sync call used by service driver at EL1 to query DCMF (Decision
+ * Configuration Management Firmware) version from FW
+ *
+ * Call register usage:
+ * a0 INTEL_SIP_SMC_RSU_DCMF_VERSION
+ * a1-7 not used
+ *
+ * Return status
+ * a0 INTEL_SIP_SMC_STATUS_OK
+ * a1 dcmf1 | dcmf0
+ * a2 dcmf3 | dcmf2
+ *
+ * Or
+ *
+ * a0 INTEL_SIP_SMC_RSU_ERROR
+ */
+#define INTEL_SIP_SMC_FUNCID_RSU_DCMF_VERSION 16
+#define INTEL_SIP_SMC_RSU_DCMF_VERSION \
+	INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_RSU_DCMF_VERSION)
+
+/**
+ * Request INTEL_SIP_SMC_RSU_MAX_RETRY
+ *
+ * Sync call used by service driver at EL1 to query max retry value from FW
+ *
+ * Call register usage:
+ * a0 INTEL_SIP_SMC_RSU_MAX_RETRY
+ * a1-7 not used
+ *
+ * Return status
+ * a0 INTEL_SIP_SMC_STATUS_OK
+ * a1 max retry value
+ *
+ * Or
+ * a0 INTEL_SIP_SMC_RSU_ERROR
+ */
+#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)

include/linux/firmware/intel/stratix10-svc-client.h

···
  *
  * @COMMAND_RSU_RETRY: query firmware for the current image's retry counter,
  * return status is SVC_STATUS_OK or SVC_STATUS_ERROR
+ *
+ * @COMMAND_RSU_MAX_RETRY: query firmware for the max retry value,
+ * return status is SVC_STATUS_OK or SVC_STATUS_ERROR
+ *
+ * @COMMAND_RSU_DCMF_VERSION: query firmware for the DCMF version, return status
+ * is SVC_STATUS_OK or SVC_STATUS_ERROR
  */
 enum stratix10_svc_command_code {
 	COMMAND_NOOP = 0,
···
 	COMMAND_RSU_UPDATE,
 	COMMAND_RSU_NOTIFY,
 	COMMAND_RSU_RETRY,
+	COMMAND_RSU_MAX_RETRY,
+	COMMAND_RSU_DCMF_VERSION,
 };
 
 /**