linux-kernel - [PATCH 6/6] firmware: stratix10-svc: To support a command ATF Get Version

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Date:   Mon, 11 Jul 2022 17:31:40 -0500
From:   Dinh Nguyen <dinguyen@...nel.org>
To:     gregkh@...uxfoundation.org
Cc:     dinguyen@...nel.org, linux-kernel@...r.kernel.org,
        Ang Tien Sung <tien.sung.ang@...el.com>
Subject: [PATCH 6/6] firmware: stratix10-svc: To support a command ATF Get Version

From: Ang Tien Sung <tien.sung.ang@...el.com>

We are to support a new SMC Command of hexadecimal 0x200 that returns
the ATF Firmware major and minor version.

Signed-off-by: Ang Tien Sung <tien.sung.ang@...el.com>
Signed-off-by: Dinh Nguyen <dinguyen@...nel.org>
---
 drivers/firmware/stratix10-svc.c               | 10 ++++++++++
 include/linux/firmware/intel/stratix10-smc.h   | 18 ++++++++++++++++++
 .../firmware/intel/stratix10-svc-client.h      |  5 +++++
 3 files changed, 33 insertions(+)

diff --git a/drivers/firmware/stratix10-svc.c b/drivers/firmware/stratix10-svc.c
index 7fea94fe2ca0..b4081f4d88a3 100644
--- a/drivers/firmware/stratix10-svc.c
+++ b/drivers/firmware/stratix10-svc.c
@@ -343,6 +343,11 @@ static void svc_thread_recv_status_ok(struct stratix10_svc_data *p_data,
 		cb_data->status = BIT(SVC_STATUS_OK);
 		cb_data->kaddr1 = &res.a1;
 		break;
+	case COMMAND_SMC_SVC_VERSION:
+		cb_data->status = BIT(SVC_STATUS_OK);
+		cb_data->kaddr1 = &res.a1;
+		cb_data->kaddr2 = &res.a2;
+		break;
 	case COMMAND_RSU_DCMF_VERSION:
 		cb_data->status = BIT(SVC_STATUS_OK);
 		cb_data->kaddr1 = &res.a1;
@@ -524,6 +529,11 @@ static int svc_normal_to_secure_thread(void *data)
 			a1 = 0;
 			a2 = 0;
 			break;
+		case COMMAND_SMC_SVC_VERSION:
+			a0 = INTEL_SIP_SMC_SVC_VERSION;
+			a1 = 0;
+			a2 = 0;
+			break;
 		default:
 			pr_warn("it shouldn't happen\n");
 			break;
diff --git a/include/linux/firmware/intel/stratix10-smc.h b/include/linux/firmware/intel/stratix10-smc.h
index 8fc4aa450517..a718f853d457 100644
--- a/include/linux/firmware/intel/stratix10-smc.h
+++ b/include/linux/firmware/intel/stratix10-smc.h
@@ -466,6 +466,24 @@ INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FPGA_CONFIG_COMPLETED_WRITE)
 #define INTEL_SIP_SMC_FIRMWARE_VERSION \
         INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FIRMWARE_VERSION)
 
+/**
+ * Request INTEL_SIP_SMC_SVC_VERSION
+ *
+ * Sync call used to query the SIP SMC API Version
+ *
+ * Call register usage:
+ * a0 INTEL_SIP_SMC_SVC_VERSION
+ * a1-a7 not used
+ *
+ * Return status:
+ * a0 INTEL_SIP_SMC_STATUS_OK
+ * a1 Major
+ * a2 Minor
+ */
+#define INTEL_SIP_SMC_SVC_FUNCID_VERSION 512
+#define INTEL_SIP_SMC_SVC_VERSION \
+	INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_SVC_FUNCID_VERSION)
+
 /**
  * SMC call protocol for FPGA Crypto Service (FCS)
  * FUNCID starts from 90
diff --git a/include/linux/firmware/intel/stratix10-svc-client.h b/include/linux/firmware/intel/stratix10-svc-client.h
index 82a20e62f15f..a776a787ac75 100644
--- a/include/linux/firmware/intel/stratix10-svc-client.h
+++ b/include/linux/firmware/intel/stratix10-svc-client.h
@@ -114,6 +114,9 @@ struct stratix10_svc_chan;
  * @COMMAND_FIRMWARE_VERSION: query running firmware version, return status
  * is SVC_STATUS_OK or SVC_STATUS_ERROR
  *
+ * @COMMAND_SMC_SVC_VERSION: Non-mailbox SMC SVC API Version,
+ * return status is SVC_STATUS_OK
+ *
  * @COMMAND_RSU_DCMF_STATUS: query firmware for the DCMF status
  * return status is SVC_STATUS_OK or SVC_STATUS_ERROR
  *
@@ -160,6 +163,8 @@ enum stratix10_svc_command_code {
 	COMMAND_FCS_RANDOM_NUMBER_GEN,
 	/* for general status poll */
 	COMMAND_POLL_SERVICE_STATUS = 40,
+	/* Non-mailbox SMC Call */
+	COMMAND_SMC_SVC_VERSION = 200,
 };
 
 /**
-- 
2.25.1