[PATCH v1 1/3] board: ns3: add optee based bnxt fw load driver

[Rayagonda Kokatanur]

From: Vikas Gupta <vikas.gupta at broadcom.com>

Add optee based bnxt fw load driver.

Signed-off-by: Vikas Gupta <vikas.gupta at broadcom.com>
Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur at broadcom.com>
---
 board/broadcom/bcmns3/Kconfig       |   5 +
 board/broadcom/bcmns3/Makefile      |   1 +
 board/broadcom/bcmns3/chimp_optee.c | 154 ++++++++++++++++++++++++++++
 include/brcm/chimp.h                |  40 ++++++++
 4 files changed, 200 insertions(+)
 create mode 100644 board/broadcom/bcmns3/chimp_optee.c
 create mode 100644 include/brcm/chimp.h

diff --git a/board/broadcom/bcmns3/Kconfig b/board/broadcom/bcmns3/Kconfig
index 8ce21f980d..84daad9415 100644
--- a/board/broadcom/bcmns3/Kconfig
+++ b/board/broadcom/bcmns3/Kconfig
@@ -12,4 +12,9 @@ config SYS_SOC
 config SYS_CONFIG_NAME
 	default "bcm_ns3"
 
+config CHIMP_OPTEE
+	bool "Enable secure ChiMP firmware loading"
+	depends on OPTEE
+	default y
+
 endif
diff --git a/board/broadcom/bcmns3/Makefile b/board/broadcom/bcmns3/Makefile
index 3404260148..08e1d7203b 100644
--- a/board/broadcom/bcmns3/Makefile
+++ b/board/broadcom/bcmns3/Makefile
@@ -3,3 +3,4 @@
 # Copyright 2020 Broadcom.
 
 obj-y	:= ns3.o
+obj-$(CONFIG_CHIMP_OPTEE) += chimp_optee.o
diff --git a/board/broadcom/bcmns3/chimp_optee.c b/board/broadcom/bcmns3/chimp_optee.c
new file mode 100644
index 0000000000..edbb7afd91
--- /dev/null
+++ b/board/broadcom/bcmns3/chimp_optee.c
@@ -0,0 +1,154 @@
+// SPDX-License-Identifier: BSD-2-Clause
+/*
+ * Copyright 2020 Broadcom.
+ */
+
+#include <brcm/chimp.h>
+#include <common.h>
+#include <tee.h>
+
+#define CHMIP_BOOT_UUID { 0x6272636D, 0x2019, 0x0716, \
+		   { 0x42, 0x43, 0x4D, 0x5F, 0x53, 0x43, 0x48, 0x49 } }
+
+enum {
+	TEE_CHIMP_FASTBOOT = 0,
+	TEE_CHIMP_HEALTH_STATUS,
+	TEE_CHIMP_HANDSHAKE_STATUS,
+} tee_chmip_cmd;
+
+struct bcm_chimp_data {
+	struct udevice *tee;
+	u32 session;
+} chimp_data;
+
+static int get_open_session(struct bcm_chimp_data *b_data)
+{
+	struct udevice *tee = NULL;
+
+	while (!b_data->tee) {
+		const struct tee_optee_ta_uuid uuid = CHMIP_BOOT_UUID;
+		struct tee_open_session_arg arg;
+		int rc;
+
+		tee = tee_find_device(tee, NULL, NULL, NULL);
+		if (!tee)
+			return -ENODEV;
+
+		memset(&arg, 0, sizeof(arg));
+		tee_optee_ta_uuid_to_octets(arg.uuid, &uuid);
+		rc = tee_open_session(tee, &arg, 0, NULL);
+		if (!rc) {
+			b_data->tee = tee;
+			b_data->session = arg.session;
+		}
+	}
+
+	return 0;
+}
+
+int chimp_handshake_status_optee(u32 timeout, u32 *hs)
+{
+	struct tee_invoke_arg arg;
+	struct tee_param param[1];
+	int ret;
+
+	if (get_open_session(&chimp_data))
+		return BCM_CHIMP_FAILURE;
+
+	memset(&arg, 0, sizeof(arg));
+	arg.func = TEE_CHIMP_HANDSHAKE_STATUS;
+	arg.session = chimp_data.session;
+
+	param[0].attr = TEE_PARAM_ATTR_TYPE_VALUE_INOUT;
+	param[0].u.value.a = timeout;
+
+	if (tee_invoke_func(chimp_data.tee, &arg,
+			    ARRAY_SIZE(param), param)) {
+		printf("Handshake status command failed\n");
+		ret = BCM_CHIMP_FAILURE;
+		goto out;
+	}
+	switch (arg.ret) {
+	case TEE_SUCCESS:
+		*hs = param[0].u.value.a;
+		ret =  BCM_CHIMP_SUCCESS;
+		break;
+	default:
+		ret = BCM_CHIMP_FAILURE;
+		break;
+	}
+out:
+	tee_close_session(chimp_data.tee, chimp_data.session);
+	chimp_data.tee = NULL;
+
+	return ret;
+}
+
+int chimp_health_status_optee(u32 *health)
+{
+	struct tee_invoke_arg arg;
+	struct tee_param param[1];
+	int ret;
+
+	if (get_open_session(&chimp_data))
+		return BCM_CHIMP_FAILURE;
+
+	memset(&arg, 0, sizeof(arg));
+	arg.func = TEE_CHIMP_HEALTH_STATUS;
+	arg.session = chimp_data.session;
+
+	param[0].attr = TEE_PARAM_ATTR_TYPE_VALUE_OUTPUT;
+
+	if (tee_invoke_func(chimp_data.tee, &arg,
+			    ARRAY_SIZE(param), param)) {
+		printf("Helath status command failed\n");
+		ret =  BCM_CHIMP_FAILURE;
+		goto out;
+	}
+	switch (arg.ret) {
+	case TEE_SUCCESS:
+		*health = param[0].u.value.a;
+		ret =  BCM_CHIMP_SUCCESS;
+		break;
+	default:
+		ret = BCM_CHIMP_FAILURE;
+		break;
+	}
+out:
+	tee_close_session(chimp_data.tee, chimp_data.session);
+	chimp_data.tee = NULL;
+
+	return ret;
+}
+
+int chimp_fastboot_optee(void)
+{
+	struct tee_invoke_arg arg;
+	int ret;
+
+	if (get_open_session(&chimp_data))
+		return BCM_CHIMP_FAILURE;
+
+	memset(&arg, 0, sizeof(arg));
+	arg.func = TEE_CHIMP_FASTBOOT;
+	arg.session = chimp_data.session;
+
+	if (tee_invoke_func(chimp_data.tee, &arg, 0, NULL)) {
+		printf("Chimp boot_fail\n");
+		ret =  BCM_CHIMP_FAILURE;
+		goto out;
+	}
+	switch (arg.ret) {
+	case TEE_SUCCESS:
+		ret = BCM_CHIMP_SUCCESS;
+		break;
+	default:
+		ret = BCM_CHIMP_FAILURE;
+		break;
+	}
+out:
+	tee_close_session(chimp_data.tee, chimp_data.session);
+	chimp_data.tee = NULL;
+
+	return ret;
+}
diff --git a/include/brcm/chimp.h b/include/brcm/chimp.h
new file mode 100644
index 0000000000..c3d4594c4b
--- /dev/null
+++ b/include/brcm/chimp.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2020 Broadcom.
+ *
+ */
+
+#ifndef __CHIMP_H__
+#define __CHIMP_H__
+
+#include <common.h>
+#include <linux/compiler.h>
+
+#define BCM_CHIMP_SUCCESS	0
+#define BCM_CHIMP_FAILURE	(!BCM_CHIMP_SUCCESS)
+
+#ifdef CONFIG_CHIMP_OPTEE
+int chimp_fastboot_optee(void);
+int chimp_health_status_optee(u32 *status);
+int chimp_handshake_status_optee(u32 timeout, u32 *hstatus);
+#else
+static inline int chimp_handshake_status_optee(u32 timeout, u32 *status)
+{
+	printf("ChiMP handshake status fail (OPTEE not enabled)\n");
+	return BCM_CHIMP_FAILURE;
+}
+
+static inline int chimp_health_status_optee(u32 *status)
+{
+	printf("ChiMP health status fail (OPTEE not enabled)\n");
+	return BCM_CHIMP_FAILURE;
+}
+
+static inline int chimp_fastboot_optee(void)
+{
+	printf("ChiMP secure boot fail (OPTEE not enabled)\n");
+	return BCM_CHIMP_FAILURE;
+}
+#endif
+
+#endif
-- 
2.17.1