firmware: add remote status update client support

Extend Intel Stratix10 service layer to support the second service layer
client, Remote Status Update (RSU).

RSU is used to provide our customers with protection against loading bad
bitstreams onto their devices when those devices are booting from flash.

Signed-off-by: Richard Gong <richard.gong@intel.com>
Signed-off-by: Alan Tull <atull@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 65 insertions, 2 deletions

diff --git a/include/linux/firmware/intel/stratix10-smc.h b/include/linux/firmware/intel/stratix10-smc.h
index a109e4ccbc7e..5be5dab50b13 100644
--- a/include/linux/firmware/intel/stratix10-smc.h
+++ b/include/linux/firmware/intel/stratix10-smc.h
@@ -67,6 +67,12 @@
  *
  * INTEL_SIP_SMC_FPGA_CONFIG_STATUS_ERROR:
  * There is error during the FPGA configuration process.
+ *
+ * INTEL_SIP_SMC_REG_ERROR:
+ * There is error during a read or write operation of the protected registers.
+ *
+ * INTEL_SIP_SMC_RSU_ERROR:
+ * There is error during a remote status update.
  */
 #define INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION           0xFFFFFFFF
 #define INTEL_SIP_SMC_STATUS_OK                         0x0
@@ -74,6 +80,7 @@
 #define INTEL_SIP_SMC_FPGA_CONFIG_STATUS_REJECTED       0x2
 #define INTEL_SIP_SMC_FPGA_CONFIG_STATUS_ERROR          0x4
 #define INTEL_SIP_SMC_REG_ERROR                         0x5
+#define INTEL_SIP_SMC_RSU_ERROR                         0x7
 
 /**
  * Request INTEL_SIP_SMC_FPGA_CONFIG_START
@@ -262,4 +269,44 @@ INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FPGA_CONFIG_COMPLETED_WRITE)
 #define INTEL_SIP_SMC_REG_UPDATE \
         INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_REG_UPDATE)
 
+/*
+ * Request INTEL_SIP_SMC_RSU_STATUS
+ *
+ * Request remote status update boot log, call is synchronous.
+ *
+ * Call register usage:
+ * a0 INTEL_SIP_SMC_RSU_STATUS
+ * a1-7 not used
+ *
+ * Return status
+ * a0: Current Image
+ * a1: Last Failing Image
+ * a2: Version | State
+ * a3: Error details | Error location
+ *
+ * Or
+ *
+ * a0: INTEL_SIP_SMC_RSU_ERROR
+ */
+#define INTEL_SIP_SMC_FUNCID_RSU_STATUS 11
+#define INTEL_SIP_SMC_RSU_STATUS \
+        INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_RSU_STATUS)
+
+/*
+ * Request INTEL_SIP_SMC_RSU_UPDATE
+ *
+ * Request to set the offset of the bitstream to boot after reboot, call
+ * is synchronous.
+ *
+ * Call register usage:
+ * a0 INTEL_SIP_SMC_RSU_UPDATE
+ * a1 64bit physical address of the configuration data memory in flash
+ * a2-7 not used
+ *
+ * Return status
+ * a0 INTEL_SIP_SMC_STATUS_OK
+ */
+#define INTEL_SIP_SMC_FUNCID_RSU_UPDATE 12
+#define INTEL_SIP_SMC_RSU_UPDATE \
+        INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_RSU_UPDATE)
 #endif
diff --git a/include/linux/firmware/intel/stratix10-svc-client.h b/include/linux/firmware/intel/stratix10-svc-client.h
index f2fda7e1ca52..e521f172a47a 100644
--- a/include/linux/firmware/intel/stratix10-svc-client.h
+++ b/include/linux/firmware/intel/stratix10-svc-client.h
@@ -10,8 +10,10 @@
  * Service layer driver supports client names
  *
  * fpga: for FPGA configuration
+ * rsu: for remote status update
  */
 #define SVC_CLIENT_FPGA                 "fpga"
+#define SVC_CLIENT_RSU                  "rsu"
 
 /**
  * Status of the sent command, in bit number
@@ -36,6 +38,9 @@
  *
  * SVC_COMMAND_STATUS_RECONFIG_ERROR:
  * Error encountered during FPGA configuration.
+ *
+ * SVC_STATUS_RSU_OK:
+ * Secure firmware accepts the request of remote status update (RSU).
  */
 #define SVC_STATUS_RECONFIG_REQUEST_OK          0
 #define SVC_STATUS_RECONFIG_BUFFER_SUBMITTED    1
@@ -43,7 +48,8 @@
 #define SVC_STATUS_RECONFIG_COMPLETED           3
 #define SVC_STATUS_RECONFIG_BUSY                4
 #define SVC_STATUS_RECONFIG_ERROR               5
-
+#define SVC_STATUS_RSU_OK                       6
+#define SVC_STATUS_RSU_ERROR                    7
 /**
  * Flag bit for COMMAND_RECONFIG
  *
@@ -56,9 +62,11 @@
 /**
  * Timeout settings for service clients:
  * timeout value used in Stratix10 FPGA manager driver.
+ * timeout value used in RSU driver
  */
 #define SVC_RECONFIG_REQUEST_TIMEOUT_MS         100
 #define SVC_RECONFIG_BUFFER_TIMEOUT_MS          240
+#define SVC_RSU_REQUEST_TIMEOUT_MS              300
 
 struct stratix10_svc_chan;
 
@@ -81,13 +89,21 @@ struct stratix10_svc_chan;
  * @COMMAND_RECONFIG_STATUS: check the status of the configuration, return
  * status is SVC_STATUS_RECONFIG_COMPLETED, or  SVC_STATUS_RECONFIG_BUSY, or
  * SVC_STATUS_RECONFIG_ERROR
+ *
+ * @COMMAND_RSU_STATUS: request remote system update boot log, return status
+ * is log data or SVC_STATUS_RSU_ERROR
+ *
+ * @COMMAND_RSU_UPDATE: set the offset of the bitstream to boot after reboot,
+ * return status is SVC_STATUS_RSU_OK or SVC_STATUS_RSU_ERROR
  */
 enum stratix10_svc_command_code {
         COMMAND_NOOP = 0,
         COMMAND_RECONFIG,
         COMMAND_RECONFIG_DATA_SUBMIT,
         COMMAND_RECONFIG_DATA_CLAIM,
-        COMMAND_RECONFIG_STATUS
+        COMMAND_RECONFIG_STATUS,
+        COMMAND_RSU_STATUS,
+        COMMAND_RSU_UPDATE
 };
 
 /**