Am Di., 3. Sept. 2024 um 04:09 Uhr schrieb Xiaolei Wang
<xiaolei.wang@xxxxxxxxxxxxx>:
>
> Remove __GFP_HIGHMEM when requesting a page from DMA32 zone,
> and since all vivante GPUs in the system will share the same
> DMA constraints, move the check of whether to get a page from
> DMA32 to etnaviv_bind().
>
> Fixes: b72af445cd38 ("drm/etnaviv: request pages from DMA32 zone when needed")
> Suggested-by: Sui Jingfeng <sui.jingfeng@xxxxxxxxx>
> Signed-off-by: Xiaolei Wang <xiaolei.wang@xxxxxxxxxxxxx>
Reviewed-by: Christian Gmeiner <cgmeiner@xxxxxxxxxx>
> ---
>
> change log
>
> v1:
> https://patchwork.kernel.org/project/dri-devel/patch/20240806104733.2018783-1-xiaolei.wang@xxxxxxxxxxxxx/
>
> v2:
> Modify the issue of not retaining GFP_USER in v1 and update the commit log.
>
> v3:
> Use "priv->shm_gfp_mask = GFP_USER | __GFP_RETRY_MAYFAIL | __GFP_NOWARN;"
> instead of
> "priv->shm_gfp_mask = GFP_HIGHUSER | __GFP_RETRY_MAYFAIL | __GFP_NOWARN;"
> and move the check of whether to get a page from DMA32 to etnaviv_bind().
>
> drivers/gpu/drm/etnaviv/etnaviv_drv.c | 10 +++++++++-
> drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 8 --------
> 2 files changed, 9 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> index 6500f3999c5f..8cb2c3ec8e5d 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> @@ -536,7 +536,15 @@ static int etnaviv_bind(struct device *dev)
> mutex_init(&priv->gem_lock);
> INIT_LIST_HEAD(&priv->gem_list);
> priv->num_gpus = 0;
> - priv->shm_gfp_mask = GFP_HIGHUSER | __GFP_RETRY_MAYFAIL | __GFP_NOWARN;
> + priv->shm_gfp_mask = GFP_USER | __GFP_RETRY_MAYFAIL | __GFP_NOWARN;
> +
> + /*
> + * If the GPU is part of a system with DMA addressing limitations,
> + * request pages for our SHM backend buffers from the DMA32 zone to
> + * hopefully avoid performance killing SWIOTLB bounce buffering.
> + */
> + if (dma_addressing_limited(dev))
> + priv->shm_gfp_mask |= GFP_DMA32;
>
> priv->cmdbuf_suballoc = etnaviv_cmdbuf_suballoc_new(drm->dev);
> if (IS_ERR(priv->cmdbuf_suballoc)) {
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
> index 7c7f97793ddd..5e753dd42f72 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
> @@ -839,14 +839,6 @@ int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
> if (ret)
> goto fail;
>
> - /*
> - * If the GPU is part of a system with DMA addressing limitations,
> - * request pages for our SHM backend buffers from the DMA32 zone to
> - * hopefully avoid performance killing SWIOTLB bounce buffering.
> - */
> - if (dma_addressing_limited(gpu->dev))
> - priv->shm_gfp_mask |= GFP_DMA32;
> -
> /* Create buffer: */
> ret = etnaviv_cmdbuf_init(priv->cmdbuf_suballoc, &gpu->buffer,
> PAGE_SIZE);
> --
> 2.25.1
>
--
greets
--
Christian Gmeiner, MSc
https://christian-gmeiner.info/privacypolicy
