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>

1 files changed, 33 insertions, 2 deletions

diff --git a/drivers/firmware/stratix10-svc.c b/drivers/firmware/stratix10-svc.c
index 168f52314963..81f3182e290d 100644
--- a/drivers/firmware/stratix10-svc.c
+++ b/drivers/firmware/stratix10-svc.c
@@ -34,7 +34,7 @@
  * timeout is set to 30 seconds (30 * 1000) at Intel Stratix10 SoC.
  */
 #define SVC_NUM_DATA_IN_FIFO			32
-#define SVC_NUM_CHANNEL				1
+#define SVC_NUM_CHANNEL				2
 #define FPGA_CONFIG_DATA_CLAIM_TIMEOUT_MS	200
 #define FPGA_CONFIG_STATUS_TIMEOUT_SEC		30
 
@@ -271,7 +271,7 @@ static void svc_thread_cmd_config_status(struct stratix10_svc_controller *ctrl,
  * @cb_data: pointer to callback data structure to service client
  * @res: result from SMC or HVC call
  *
- * Send back the correspond status to the service client (FPGA manager etc).
+ * Send back the correspond status to the service clients.
  */
 static void svc_thread_recv_status_ok(struct stratix10_svc_data *p_data,
 				      struct stratix10_svc_cb_data *cb_data,
@@ -295,6 +295,9 @@ static void svc_thread_recv_status_ok(struct stratix10_svc_data *p_data,
 	case COMMAND_RECONFIG_STATUS:
 		cb_data->status = BIT(SVC_STATUS_RECONFIG_COMPLETED);
 		break;
+	case COMMAND_RSU_UPDATE:
+		cb_data->status = BIT(SVC_STATUS_RSU_OK);
+		break;
 	default:
 		pr_warn("it shouldn't happen\n");
 		break;
@@ -373,6 +376,16 @@ static int svc_normal_to_secure_thread(void *data)
 			a1 = 0;
 			a2 = 0;
 			break;
+		case COMMAND_RSU_STATUS:
+			a0 = INTEL_SIP_SMC_RSU_STATUS;
+			a1 = 0;
+			a2 = 0;
+			break;
+		case COMMAND_RSU_UPDATE:
+			a0 = INTEL_SIP_SMC_RSU_UPDATE;
+			a1 = pdata->arg[0];
+			a2 = 0;
+			break;
 		default:
 			pr_warn("it shouldn't happen\n");
 			break;
@@ -389,6 +402,19 @@ static int svc_normal_to_secure_thread(void *data)
 			 (unsigned int)res.a1, (unsigned int)res.a2);
 		pr_debug(" res.a3=0x%016x\n", (unsigned int)res.a3);
 
+		if (pdata->command == COMMAND_RSU_STATUS) {
+			if (res.a0 == INTEL_SIP_SMC_RSU_ERROR)
+				cbdata->status = BIT(SVC_STATUS_RSU_ERROR);
+			else
+				cbdata->status = BIT(SVC_STATUS_RSU_OK);
+
+			cbdata->kaddr1 = &res;
+			cbdata->kaddr2 = NULL;
+			cbdata->kaddr3 = NULL;
+			pdata->chan->scl->receive_cb(pdata->chan->scl, cbdata);
+			continue;
+		}
+
 		switch (res.a0) {
 		case INTEL_SIP_SMC_STATUS_OK:
 			svc_thread_recv_status_ok(pdata, cbdata, res);
@@ -941,6 +967,11 @@ static int stratix10_svc_drv_probe(struct platform_device *pdev)
 	chans[0].name = SVC_CLIENT_FPGA;
 	spin_lock_init(&chans[0].lock);
 
+	chans[1].scl = NULL;
+	chans[1].ctrl = controller;
+	chans[1].name = SVC_CLIENT_RSU;
+	spin_lock_init(&chans[1].lock);
+
 	list_add_tail(&controller->node, &svc_ctrl);
 	platform_set_drvdata(pdev, controller);