[PATCH v6,09/24] media: mediatek: vcodec: allocate tee share memory
Andrzej Pietrasiewicz
andrzej.p at collabora.com
Wed May 22 05:23:44 PDT 2024
Hi Yunfei,
W dniu 16.05.2024 o 14:20, Yunfei Dong pisze:
> Allocate two share memory for each lat and core hardware used to share
> information with optee-os. Msg buffer used to send ipi command and get ack
> command with optee-os, data buffer used to store vsi information which
> used for hardware decode.
>
> Signed-off-by: Yunfei Dong <yunfei.dong at mediatek.com>
> ---
> .../vcodec/decoder/mtk_vcodec_dec_optee.c | 80 ++++++++++++++++++-
> .../vcodec/decoder/mtk_vcodec_dec_optee.h | 32 ++++++++
> 2 files changed, 111 insertions(+), 1 deletion(-)
>
> 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
> index 38d9c1c1785a..611fb0e56480 100644
> --- a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.c
> +++ b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.c
> @@ -47,13 +47,69 @@ int mtk_vcodec_dec_optee_private_init(struct mtk_vcodec_dec_dev *vcodec_dev)
> }
> EXPORT_SYMBOL_GPL(mtk_vcodec_dec_optee_private_init);
>
> +static void mtk_vcodec_dec_optee_deinit_memref(struct mtk_vdec_optee_ca_info *ca_info,
> + enum mtk_vdec_optee_data_index data_index)
> +{
> + tee_shm_free(ca_info->shm_memref[data_index].msg_shm);
> +}
> +
> +static int mtk_vcodec_dec_optee_init_memref(struct tee_context *tee_vdec_ctx,
> + struct mtk_vdec_optee_ca_info *ca_info,
> + enum mtk_vdec_optee_data_index data_index)
> +{
> + struct mtk_vdec_optee_shm_memref *shm_memref;
> + int alloc_size = 0, err = 0;
> + u64 shm_param_type = 0;
> + bool copy_buffer;
> +
> + switch (data_index) {
> + case OPTEE_MSG_INDEX:
> + shm_param_type = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT;
> + alloc_size = MTK_VDEC_OPTEE_MSG_SIZE;
> + copy_buffer = true;
> + break;
> + case OPTEE_DATA_INDEX:
> + shm_param_type = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT;
> + alloc_size = MTK_VDEC_OPTEE_HW_SIZE;
> + copy_buffer = false;
> + break;
> + default:
> + pr_err(MTK_DBG_VCODEC_STR "tee invalid data_index: %d.\n", data_index);
> + return -EINVAL;
> + }
> +
> + shm_memref = &ca_info->shm_memref[data_index];
> +
> + /* Allocate dynamic shared memory with decoder TA */
> + shm_memref->msg_shm_size = alloc_size;
> + shm_memref->param_type = shm_param_type;
> + shm_memref->copy_to_ta = copy_buffer;
> + shm_memref->msg_shm = tee_shm_alloc_kernel_buf(tee_vdec_ctx, shm_memref->msg_shm_size);
> + if (IS_ERR(shm_memref->msg_shm)) {
> + pr_err(MTK_DBG_VCODEC_STR "tee alloc buf fail: data_index:%d.\n", data_index);
> + return -ENOMEM;
> + }
> +
> + shm_memref->msg_shm_ca_buf = tee_shm_get_va(shm_memref->msg_shm, 0);
> + if (IS_ERR(shm_memref->msg_shm_ca_buf)) {
> + pr_err(MTK_DBG_VCODEC_STR "tee get shm va fail: data_index:%d.\n", data_index);
> + err = PTR_ERR(shm_memref->msg_shm_ca_buf);
> + goto err_get_msg_va;
> + }
> +
> + return err;
Anything other than a zero possible here? In error-free exectution the return
value of zero is set far away from here. And then both error-free execution
and error recovery end in "return err;" which looks kind of weird to me.
Maybe that's just my personal preference, but I'd prefer "return 0;" here.
Alternatively, maybe rename "err" as "ret"? This applies to all patches.
I wouldn't mind a blank line here to visually separate the error recovery path
from error-free execution. This applies to all patches.
> +err_get_msg_va:
> + tee_shm_free(shm_memref->msg_shm);
> + return err;
> +}
> +
> 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;
> + int err, i, j, session_func;
>
> /* Open lat and core session with vdec TA. */
> switch (hardware_index) {
> @@ -87,6 +143,24 @@ static int mtk_vcodec_dec_optee_init_hw_info(struct mtk_vdec_optee_private *opte
> 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);
>
> + /* Allocate dynamic shared memory with decoder TA */
> + for (i = 0; i < OPTEE_MAX_INDEX; i++) {
> + err = mtk_vcodec_dec_optee_init_memref(optee_private->tee_vdec_ctx, ca_info, i);
> + if (err) {
> + dev_err(dev, MTK_DBG_VCODEC_STR "init vdec memref failed: %d.\n", i);
> + goto err_init_memref;
> + }
> + }
> +
> + return err;
> +err_init_memref:
> + if (i != 0) {
Isn't i now equal to the index at which init memref failed?
> + for (j = 0; j < i; j++)
> + mtk_vcodec_dec_optee_deinit_memref(ca_info, j);
> + }
So instead of the above maybe:
--i;
while (i >= 0)
mtk_vcodec_dec_optee_deinit_memref(ca_info, i--);
after --i the i points to the last successfully initialized memref unless < 0.
This way you can eliminate the j.
> +
> + tee_client_close_session(optee_private->tee_vdec_ctx, ca_info->vdec_session_id);
> +
> return err;
> }
>
> @@ -94,12 +168,16 @@ static void mtk_vcodec_dec_optee_deinit_hw_info(struct mtk_vdec_optee_private *o
> enum mtk_vdec_hw_id hw_id)
> {
> struct mtk_vdec_optee_ca_info *ca_info;
> + int i;
>
> if (hw_id == MTK_VDEC_LAT0)
> ca_info = &optee_private->lat_ca;
> else
> ca_info = &optee_private->core_ca;
>
> + for (i = 0; i < OPTEE_MAX_INDEX; i++)
> + mtk_vcodec_dec_optee_deinit_memref(ca_info, i);
> +
> tee_client_close_session(optee_private->tee_vdec_ctx, ca_info->vdec_session_id);
> }
>
> 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
> index 8b1dca49331e..24aa63af9887 100644
> --- a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.h
> +++ b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.h
> @@ -18,16 +18,48 @@
>
> #define MTK_OPTEE_MAX_TEE_PARAMS 4
>
> +#define MTK_VDEC_OPTEE_MSG_SIZE 128
> +#define MTK_VDEC_OPTEE_HW_SIZE (8 * SZ_1K)
> +
> +/**
> + * struct mtk_vdec_optee_shm_memref - share memory reference params
maybe s/share/shared ? Applies to other occurences as well.
Regards,
Andrzej
> + * @msg_shm: message shared with TA in TEE.
> + * @msg_shm_ca_buf: ca buffer.
> + *
> + * @msg_shm_size: share message size.
> + * @param_type: each tee param types.
> + * @copy_to_ta: need to copy data from ca to share memory.
> + */
> +struct mtk_vdec_optee_shm_memref {
> + struct tee_shm *msg_shm;
> + u8 *msg_shm_ca_buf;
> +
> + u32 msg_shm_size;
> + u64 param_type;
> + bool copy_to_ta;
> +};
> +
> /**
> * 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.
> + * @shm_memref: share memory reference params.
> */
> 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_shm_memref shm_memref[MTK_OPTEE_MAX_TEE_PARAMS];
> +};
> +
> +/*
> + * enum mtk_vdec_optee_data_index - used to indentify each share memory information
> + */
> +enum mtk_vdec_optee_data_index {
> + OPTEE_MSG_INDEX = 0,
> + OPTEE_DATA_INDEX,
> + OPTEE_MAX_INDEX,
> };
>
> /**
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