firmware: stratix10-svc: Add support to query Arm Trusted Firmware (ATF) version

Add entry in Stratix10 service layer that allow client to retrieve the ATF
version at runtime, which is useful for system diagnostics, compatibility
checks, and ensuring the correct secure firmware is in use.

The change introduces:
- A new service command definition in the Stratix10 service layer to
initiate the ATF version query.
- A corresponding macro definition in the header file to expose the command
ID for use by other components.

The service layer uses a Secure Monitor Call (SMC) to communicate with the
ATF and retrieve the version string, which can then be logged or validated
by client application.

Signed-off-by: Tze Yee Ng <tze.yee.ng@altera.com>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>

diff --git a/drivers/firmware/stratix10-svc.c b/drivers/firmware/stratix10-svc.c
index 282211d2612bf4eaa801d1db470a3eb65a1d8cb4..00e134e663c8dc63d7dc1c57cc3cddf64ab2c9bd 100644 (file)
--- a/drivers/firmware/stratix10-svc.c
+++ b/drivers/firmware/stratix10-svc.c
@@ -486,6 +486,12 @@ static void svc_thread_recv_status_ok(struct stratix10_svc_data *p_data,
                cb_data->kaddr1 = &res.a1;
                cb_data->kaddr2 = &res.a2;
                break;
+       case COMMAND_SMC_ATF_BUILD_VER:
+               cb_data->status = BIT(SVC_STATUS_OK);
+               cb_data->kaddr1 = &res.a1;
+               cb_data->kaddr2 = &res.a2;
+               cb_data->kaddr3 = &res.a3;
+               break;
        case COMMAND_RSU_DCMF_VERSION:
                cb_data->status = BIT(SVC_STATUS_OK);
                cb_data->kaddr1 = &res.a1;
@@ -704,6 +710,12 @@ static int svc_normal_to_secure_thread(void *data)
                        a1 = 0;
                        a2 = 0;
                        break;
+               case COMMAND_SMC_ATF_BUILD_VER:
+                       a0 = INTEL_SIP_SMC_ATF_BUILD_VER;
+                       a1 = 0;
+                       a2 = 0;
+                       a3 = 0;
+                       break;
                case COMMAND_MBOX_SEND_CMD:
                        a0 = INTEL_SIP_SMC_MBOX_SEND_CMD;
                        a1 = pdata->arg[0];

diff --git a/include/linux/firmware/intel/stratix10-smc.h b/include/linux/firmware/intel/stratix10-smc.h
index 36ea619ea2ad8cd5175245abea415fa57f63b403..9116512169dc1d04a56933b86a334f6172332199 100644 (file)
--- a/include/linux/firmware/intel/stratix10-smc.h
+++ b/include/linux/firmware/intel/stratix10-smc.h
@@ -514,6 +514,25 @@ INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FPGA_CONFIG_COMPLETED_WRITE)
 #define INTEL_SIP_SMC_SVC_VERSION \
        INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_SVC_FUNCID_VERSION)
 
+/**
+ * Request INTEL_SIP_SMC_ATF_BUILD_VER
+ *
+ * Sync call used to query the ATF Build Version
+ *
+ * Call register usage:
+ * a0 INTEL_SIP_SMC_ATF_BUILD_VER
+ * a1-a7 not used
+ *
+ * Return status:
+ * a0 INTEL_SIP_SMC_STATUS_OK
+ * a1 Major
+ * a2 Minor
+ * a3 Patch
+ */
+#define INTEL_SIP_SMC_ATF_BUILD_VERSION 155
+#define INTEL_SIP_SMC_ATF_BUILD_VER \
+               INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_ATF_BUILD_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 91013161e9db9897466b705b3250846759df3af2..3edd93502bf84083cef0fce699c05769394cb830 100644 (file)
--- a/include/linux/firmware/intel/stratix10-svc-client.h
+++ b/include/linux/firmware/intel/stratix10-svc-client.h
@@ -154,6 +154,10 @@ struct stratix10_svc_chan;
  *
  * @COMMAND_HWMON_READVOLT: query the voltage from the hardware monitor,
  * return status is SVC_STATUS_OK or SVC_STATUS_ERROR
+ *
+ * @COMMAND_SMC_ATF_BUILD_VER: Non-mailbox SMC ATF Build Version,
+ * return status is SVC_STATUS_OK
+ *
  */
 enum stratix10_svc_command_code {
        /* for FPGA */
@@ -187,7 +191,8 @@ enum stratix10_svc_command_code {
        COMMAND_SMC_SVC_VERSION = 200,
        /* for HWMON */
        COMMAND_HWMON_READTEMP,
-       COMMAND_HWMON_READVOLT
+       COMMAND_HWMON_READVOLT,
+       COMMAND_SMC_ATF_BUILD_VER
 };
 
 /**