[PATCH v5, 08/23] media: mediatek: vcodec: add tee client interface to communiate with optee-os
Yunfei Dong
yunfei.dong at mediatek.com
Fri Apr 12 09:08:36 UTC 2024
Open tee context to initialize the environment in order to communication
with optee-os, then open tee session as the communication pipeline for
lat and core to send data for hardware decode.
Signed-off-by: Yunfei Dong <yunfei.dong at mediatek.com>
---
.../platform/mediatek/vcodec/decoder/Makefile | 1 +
.../vcodec/decoder/mtk_vcodec_dec_drv.h | 5 +
.../vcodec/decoder/mtk_vcodec_dec_optee.c | 165 ++++++++++++++++++
.../vcodec/decoder/mtk_vcodec_dec_optee.h | 73 ++++++++
4 files changed, 244 insertions(+)
create mode 100644 drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.c
create mode 100644 drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.h
diff --git a/drivers/media/platform/mediatek/vcodec/decoder/Makefile b/drivers/media/platform/mediatek/vcodec/decoder/Makefile
index 904cd22def84..1624933dfd5e 100644
--- a/drivers/media/platform/mediatek/vcodec/decoder/Makefile
+++ b/drivers/media/platform/mediatek/vcodec/decoder/Makefile
@@ -21,5 +21,6 @@ mtk-vcodec-dec-y := vdec/vdec_h264_if.o \
mtk_vcodec_dec_stateful.o \
mtk_vcodec_dec_stateless.o \
mtk_vcodec_dec_pm.o \
+ mtk_vcodec_dec_optee.o \
mtk-vcodec-dec-hw-y := mtk_vcodec_dec_hw.o
diff --git a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h
index f975db4293da..76a0323f993c 100644
--- a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h
+++ b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h
@@ -11,6 +11,7 @@
#include "../common/mtk_vcodec_dbgfs.h"
#include "../common/mtk_vcodec_fw_priv.h"
#include "../common/mtk_vcodec_util.h"
+#include "mtk_vcodec_dec_optee.h"
#include "vdec_msg_queue.h"
#define MTK_VCODEC_DEC_NAME "mtk-vcodec-dec"
@@ -261,6 +262,8 @@ struct mtk_vcodec_dec_ctx {
* @dbgfs: debug log related information
*
* @chip_name: used to distinguish platforms and select the correct codec configuration values
+ *
+ * @optee_private: optee private data
*/
struct mtk_vcodec_dec_dev {
struct v4l2_device v4l2_dev;
@@ -303,6 +306,8 @@ struct mtk_vcodec_dec_dev {
struct mtk_vcodec_dbgfs dbgfs;
enum mtk_vcodec_dec_chip_name chip_name;
+
+ struct mtk_vdec_optee_private *optee_private;
};
static inline struct mtk_vcodec_dec_ctx *fh_to_dec_ctx(struct v4l2_fh *fh)
diff --git a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.c b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.c
new file mode 100644
index 000000000000..38d9c1c1785a
--- /dev/null
+++ b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.c
@@ -0,0 +1,165 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2023 MediaTek Inc.
+ * Author: Yunfei Dong <yunfei.dong at mediatek.com>
+ */
+
+#include "mtk_vcodec_dec_drv.h"
+#include "mtk_vcodec_dec_optee.h"
+
+/*
+ * Randomly generated, and must correspond to the GUID on the TA side.
+ */
+static const uuid_t mtk_vdec_lat_uuid =
+ UUID_INIT(0xBC50D971, 0xD4C9, 0x42C4,
+ 0x82, 0xCB, 0x34, 0x3F, 0xB7, 0xF3, 0x78, 0x90);
+
+static const uuid_t mtk_vdec_core_uuid =
+ UUID_INIT(0xBC50D971, 0xD4C9, 0x42C4,
+ 0x82, 0xCB, 0x34, 0x3F, 0xB7, 0xF3, 0x78, 0x91);
+
+/*
+ * Check whether this driver supports decoder TA in the TEE instance,
+ * represented by the params (ver/data) of this function.
+ */
+static int mtk_vcodec_dec_optee_match(struct tee_ioctl_version_data *ver_data, const void *not_used)
+{
+ if (ver_data->impl_id == TEE_IMPL_ID_OPTEE)
+ return 1;
+ else
+ return 0;
+}
+
+int mtk_vcodec_dec_optee_private_init(struct mtk_vcodec_dec_dev *vcodec_dev)
+{
+ vcodec_dev->optee_private = devm_kzalloc(&vcodec_dev->plat_dev->dev,
+ sizeof(*vcodec_dev->optee_private),
+ GFP_KERNEL);
+ if (!vcodec_dev->optee_private)
+ return -ENOMEM;
+
+ vcodec_dev->optee_private->vcodec_dev = vcodec_dev;
+
+ atomic_set(&vcodec_dev->optee_private->tee_active_cnt, 0);
+ mutex_init(&vcodec_dev->optee_private->tee_mutex);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_vcodec_dec_optee_private_init);
+
+static int mtk_vcodec_dec_optee_init_hw_info(struct mtk_vdec_optee_private *optee_private,
+ enum mtk_vdec_hw_id hardware_index)
+{
+ struct device *dev = &optee_private->vcodec_dev->plat_dev->dev;
+ struct tee_ioctl_open_session_arg session_arg;
+ struct mtk_vdec_optee_ca_info *ca_info;
+ int err = 0, session_func;
+
+ /* Open lat and core session with vdec TA. */
+ switch (hardware_index) {
+ case MTK_VDEC_LAT0:
+ export_uuid(session_arg.uuid, &mtk_vdec_lat_uuid);
+ session_func = MTK_VDEC_OPTEE_TA_LAT_SUBMIT_COMMAND;
+ ca_info = &optee_private->lat_ca;
+ break;
+ case MTK_VDEC_CORE:
+ export_uuid(session_arg.uuid, &mtk_vdec_core_uuid);
+ session_func = MTK_VDEC_OPTEE_TA_CORE_SUBMIT_COMMAND;
+ ca_info = &optee_private->core_ca;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ session_arg.clnt_login = TEE_IOCTL_LOGIN_PUBLIC;
+ session_arg.num_params = 0;
+
+ err = tee_client_open_session(optee_private->tee_vdec_ctx, &session_arg, NULL);
+ if (err < 0 || session_arg.ret != 0) {
+ dev_err(dev, MTK_DBG_VCODEC_STR "open vdec tee session fail hw_id:%d err:%x.\n",
+ hardware_index, session_arg.ret);
+ return -EINVAL;
+ }
+ ca_info->vdec_session_id = session_arg.session;
+ ca_info->hw_id = hardware_index;
+ ca_info->vdec_session_func = session_func;
+
+ dev_dbg(dev, MTK_DBG_VCODEC_STR "open vdec tee session hw_id:%d session_id=%x.\n",
+ hardware_index, ca_info->vdec_session_id);
+
+ return err;
+}
+
+static void mtk_vcodec_dec_optee_deinit_hw_info(struct mtk_vdec_optee_private *optee_private,
+ enum mtk_vdec_hw_id hw_id)
+{
+ struct mtk_vdec_optee_ca_info *ca_info;
+
+ if (hw_id == MTK_VDEC_LAT0)
+ ca_info = &optee_private->lat_ca;
+ else
+ ca_info = &optee_private->core_ca;
+
+ tee_client_close_session(optee_private->tee_vdec_ctx, ca_info->vdec_session_id);
+}
+
+int mtk_vcodec_dec_optee_open(struct mtk_vdec_optee_private *optee_private)
+{
+ struct device *dev = &optee_private->vcodec_dev->plat_dev->dev;
+ int ret;
+
+ mutex_lock(&optee_private->tee_mutex);
+ if (atomic_inc_return(&optee_private->tee_active_cnt) > 1) {
+ mutex_unlock(&optee_private->tee_mutex);
+ dev_dbg(dev, MTK_DBG_VCODEC_STR "already init vdec optee private data!\n");
+ return 0;
+ }
+
+ /* Open context with TEE driver */
+ optee_private->tee_vdec_ctx = tee_client_open_context(NULL, mtk_vcodec_dec_optee_match,
+ NULL, NULL);
+ if (IS_ERR(optee_private->tee_vdec_ctx)) {
+ dev_err(dev, MTK_DBG_VCODEC_STR "optee vdec tee context failed.\n");
+ ret = PTR_ERR(optee_private->tee_vdec_ctx);
+ goto err_ctx_open;
+ }
+
+ ret = mtk_vcodec_dec_optee_init_hw_info(optee_private, MTK_VDEC_LAT0);
+ if (ret < 0)
+ goto err_lat_init;
+
+ if (IS_VDEC_LAT_ARCH(optee_private->vcodec_dev->vdec_pdata->hw_arch)) {
+ ret = mtk_vcodec_dec_optee_init_hw_info(optee_private, MTK_VDEC_CORE);
+ if (ret < 0)
+ goto err_core_init;
+ }
+
+ mutex_unlock(&optee_private->tee_mutex);
+ return 0;
+err_core_init:
+ mtk_vcodec_dec_optee_deinit_hw_info(optee_private, MTK_VDEC_LAT0);
+err_lat_init:
+ tee_client_close_context(optee_private->tee_vdec_ctx);
+err_ctx_open:
+
+ mutex_unlock(&optee_private->tee_mutex);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(mtk_vcodec_dec_optee_open);
+
+void mtk_vcodec_dec_optee_release(struct mtk_vdec_optee_private *optee_private)
+{
+ mutex_lock(&optee_private->tee_mutex);
+ if (!atomic_dec_and_test(&optee_private->tee_active_cnt)) {
+ mutex_unlock(&optee_private->tee_mutex);
+ return;
+ }
+
+ mtk_vcodec_dec_optee_deinit_hw_info(optee_private, MTK_VDEC_LAT0);
+ if (IS_VDEC_LAT_ARCH(optee_private->vcodec_dev->vdec_pdata->hw_arch))
+ mtk_vcodec_dec_optee_deinit_hw_info(optee_private, MTK_VDEC_CORE);
+
+ tee_client_close_context(optee_private->tee_vdec_ctx);
+ mutex_unlock(&optee_private->tee_mutex);
+}
+EXPORT_SYMBOL_GPL(mtk_vcodec_dec_optee_release);
diff --git a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.h b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.h
new file mode 100644
index 000000000000..8b1dca49331e
--- /dev/null
+++ b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.h
@@ -0,0 +1,73 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2023 MediaTek Inc.
+ * Author: Yunfei Dong <yunfei.dong at mediatek.com>
+ */
+
+#ifndef _MTK_VCODEC_DEC_OPTEE_H_
+#define _MTK_VCODEC_DEC_OPTEE_H_
+
+#include <linux/tee_drv.h>
+#include <linux/uuid.h>
+
+#include "mtk_vcodec_dec_drv.h"
+
+/* The TA ID implemented in this TA */
+#define MTK_VDEC_OPTEE_TA_LAT_SUBMIT_COMMAND (0x10)
+#define MTK_VDEC_OPTEE_TA_CORE_SUBMIT_COMMAND (0x20)
+
+#define MTK_OPTEE_MAX_TEE_PARAMS 4
+
+/**
+ * struct mtk_vdec_optee_ca_info - ca related param
+ * @vdec_session_id: optee TA session identifier.
+ * @hw_id: hardware index.
+ * @vdec_session_func: trusted application function id used specific to the TA.
+ */
+struct mtk_vdec_optee_ca_info {
+ u32 vdec_session_id;
+ enum mtk_vdec_hw_id hw_id;
+ u32 vdec_session_func;
+};
+
+/**
+ * struct mtk_vdec_optee_private - optee private data
+ * @vcodec_dev: pointer to the mtk_vcodec_dev of the device
+ * @tee_vdec_ctx: decoder TEE context handler.
+ * @lat_ca: lat hardware information used to communicate with TA.
+ * @core_ca: core hardware information used to communicate with TA.
+ *
+ * @tee_active_cnt: used to mark whether need to init optee
+ * @tee_mutex: mutex lock used for optee
+ */
+struct mtk_vdec_optee_private {
+ struct mtk_vcodec_dec_dev *vcodec_dev;
+ struct tee_context *tee_vdec_ctx;
+
+ struct mtk_vdec_optee_ca_info lat_ca;
+ struct mtk_vdec_optee_ca_info core_ca;
+
+ atomic_t tee_active_cnt;
+ /* mutext used to lock optee open and release information. */
+ struct mutex tee_mutex;
+};
+
+/**
+ * mtk_vcodec_dec_optee_open - setup the communication channels with TA.
+ * @optee_private: optee private context
+ */
+int mtk_vcodec_dec_optee_open(struct mtk_vdec_optee_private *optee_private);
+
+/**
+ * mtk_vcodec_dec_optee_private_init - init optee parameters.
+ * @vcodec_dev: pointer to the mtk_vcodec_dev of the device
+ */
+int mtk_vcodec_dec_optee_private_init(struct mtk_vcodec_dec_dev *vcodec_dev);
+
+/**
+ * mtk_vcodec_dec_optee_release - close the communication channels with TA.
+ * @optee_private: optee private context
+ */
+void mtk_vcodec_dec_optee_release(struct mtk_vdec_optee_private *optee_private);
+
+#endif /* _MTK_VCODEC_FW_OPTEE_H_ */
--
2.18.0
More information about the dri-devel
mailing list