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J . Mercier" , =?utf-8?q?Christian_K=C3=B6nig?= , Matthias Brugger , , , , , , Subject: [PATCH v7 07/28] media: mediatek: vcodec: add tee client interface to communiate with optee-os Date: Sat, 20 Jul 2024 15:15:45 +0800 Message-ID: <20240720071606.27930-8-yunfei.dong@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240720071606.27930-1-yunfei.dong@mediatek.com> References: <20240720071606.27930-1-yunfei.dong@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240720_001625_560484_A21EE784 X-CRM114-Status: GOOD ( 26.74 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 --- .../platform/mediatek/vcodec/decoder/Makefile | 1 + .../vcodec/decoder/mtk_vcodec_dec_drv.h | 5 + .../vcodec/decoder/mtk_vcodec_dec_optee.c | 168 ++++++++++++++++++ .../vcodec/decoder/mtk_vcodec_dec_optee.h | 73 ++++++++ 4 files changed, 247 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 ac568ed14fa2..0996a8d2a537 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" @@ -262,6 +263,8 @@ 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; @@ -305,6 +308,8 @@ 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..6fce32f9ba18 --- /dev/null +++ b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.c @@ -0,0 +1,168 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2024 MediaTek Inc. + * Author: Yunfei Dong + */ + +#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) +{ + return ver_data->impl_id == TEE_IMPL_ID_OPTEE; +} + +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_vcodec_dec_dev *vcodec_dev) +{ + struct mtk_vdec_optee_private *optee_private = vcodec_dev->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 initialized 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_CORE); + if (ret < 0) + goto err_core_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_LAT0); + if (ret < 0) + goto err_lat_init; + } + + mutex_unlock(&optee_private->tee_mutex); + + return 0; + +err_lat_init: + mtk_vcodec_dec_optee_deinit_hw_info(optee_private, MTK_VDEC_CORE); +err_core_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_close(struct mtk_vcodec_dec_dev *vcodec_dev) +{ + struct mtk_vdec_optee_private *optee_private = vcodec_dev->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_CORE); + if (IS_VDEC_LAT_ARCH(optee_private->vcodec_dev->vdec_pdata->hw_arch)) + mtk_vcodec_dec_optee_deinit_hw_info(optee_private, MTK_VDEC_LAT0); + + tee_client_close_context(optee_private->tee_vdec_ctx); + mutex_unlock(&optee_private->tee_mutex); +} +EXPORT_SYMBOL_GPL(mtk_vcodec_dec_optee_close); 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..33134cf0d5d5 --- /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) 2024 MediaTek Inc. + * Author: Yunfei Dong + */ + +#ifndef _MTK_VCODEC_DEC_OPTEE_H_ +#define _MTK_VCODEC_DEC_OPTEE_H_ + +#include +#include + +#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_dec_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. + * @vcodec_dev: pointer to the mtk_vcodec_dec_dev of the device + */ +int mtk_vcodec_dec_optee_open(struct mtk_vcodec_dec_dev *vcodec_dev); + +/** + * mtk_vcodec_dec_optee_private_init - init optee parameters. + * @vcodec_dev: pointer to the mtk_vcodec_dec_dev of the device + */ +int mtk_vcodec_dec_optee_private_init(struct mtk_vcodec_dec_dev *vcodec_dev); + +/** + * mtk_vcodec_dec_optee_close - close the communication channels with TA. + * @vcodec_dev: pointer to the mtk_vcodec_dec_dev of the device + */ +void mtk_vcodec_dec_optee_close(struct mtk_vcodec_dec_dev *vcodec_dev); + +#endif /* _MTK_VCODEC_DEC_OPTEE_H_ */