From: <guangming.cao@mediatek.com>
To: <guangming.cao@mediatek.com>
Cc: <Brian.Starkey@arm.com>, <benjamin.gaignard@linaro.org>,
<christian.koenig@amd.com>, <dri-devel@lists.freedesktop.org>,
<john.stultz@linaro.org>, <labbott@redhat.com>,
<linaro-mm-sig@lists.linaro.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <linux-media@vger.kernel.org>,
<linux-mediatek@lists.infradead.org>, <lmark@codeaurora.org>,
<matthias.bgg@gmail.com>, <sumit.semwal@linaro.org>,
Guangming Cao <Guangming.Cao@mediatek.com>
Subject: [PATCH] dma-heap: Let dma heap use dma_map_attrs to map & unmap iova
Date: Thu, 15 Jul 2021 14:24:05 +0800 [thread overview]
Message-ID: <20210715062405.98932-1-guangming.cao@mediatek.com> (raw)
In-Reply-To: <20210708101421.9101-1-guangming.cao@mediatek.com>
From: Guangming Cao <Guangming.Cao@mediatek.com>
On Thu, 2021-07-08 at 18:14 +0800, guangming.cao@mediatek.com wrote:
Hi Sumit, Christian, Matthias,
gentle ping for this patch :)
BRs!
Guangming
> From: Guangming Cao <Guangming.Cao@mediatek.com>
>
> For dma-heap users, they can't bypass cache sync when map/unmap iova
> with dma heap. But they can do it by adding DMA_ATTR_SKIP_CPU_SYNC
> into dma_alloc_attrs.
>
> To keep alignment, at dma_heap side, also use
> dma_buf_attachment.dma_map_attrs to do iova map & unmap.
>
> Signed-off-by: Guangming Cao <Guangming.Cao@mediatek.com>
> ---
> drivers/dma-buf/heaps/cma_heap.c | 6 ++++--
> drivers/dma-buf/heaps/system_heap.c | 6 ++++--
> 2 files changed, 8 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/dma-buf/heaps/cma_heap.c b/drivers/dma-
> buf/heaps/cma_heap.c
> index 0c05b79870f9..2c9feb3bfc3e 100644
> --- a/drivers/dma-buf/heaps/cma_heap.c
> +++ b/drivers/dma-buf/heaps/cma_heap.c
> @@ -99,9 +99,10 @@ static struct sg_table
> *cma_heap_map_dma_buf(struct dma_buf_attachment *attachme
> {
> struct dma_heap_attachment *a = attachment->priv;
> struct sg_table *table = &a->table;
> + int attrs = attachment->dma_map_attrs;
> int ret;
>
> - ret = dma_map_sgtable(attachment->dev, table, direction, 0);
> + ret = dma_map_sgtable(attachment->dev, table, direction,
> attrs);
> if (ret)
> return ERR_PTR(-ENOMEM);
> a->mapped = true;
> @@ -113,9 +114,10 @@ static void cma_heap_unmap_dma_buf(struct
> dma_buf_attachment *attachment,
> enum dma_data_direction direction)
> {
> struct dma_heap_attachment *a = attachment->priv;
> + int attrs = attachment->dma_map_attrs;
>
> a->mapped = false;
> - dma_unmap_sgtable(attachment->dev, table, direction, 0);
> + dma_unmap_sgtable(attachment->dev, table, direction, attrs);
> }
>
> static int cma_heap_dma_buf_begin_cpu_access(struct dma_buf *dmabuf,
> diff --git a/drivers/dma-buf/heaps/system_heap.c b/drivers/dma-
> buf/heaps/system_heap.c
> index 23a7e74ef966..fc7b1e02988e 100644
> --- a/drivers/dma-buf/heaps/system_heap.c
> +++ b/drivers/dma-buf/heaps/system_heap.c
> @@ -130,9 +130,10 @@ static struct sg_table
> *system_heap_map_dma_buf(struct dma_buf_attachment *attac
> {
> struct dma_heap_attachment *a = attachment->priv;
> struct sg_table *table = a->table;
> + int attrs = attachment->dma_map_attrs;
> int ret;
>
> - ret = dma_map_sgtable(attachment->dev, table, direction, 0);
> + ret = dma_map_sgtable(attachment->dev, table, direction,
> attrs);
> if (ret)
> return ERR_PTR(ret);
>
> @@ -145,9 +146,10 @@ static void system_heap_unmap_dma_buf(struct
> dma_buf_attachment *attachment,
> enum dma_data_direction
> direction)
> {
> struct dma_heap_attachment *a = attachment->priv;
> + int attrs = attachment->dma_map_attrs;
>
> a->mapped = false;
> - dma_unmap_sgtable(attachment->dev, table, direction, 0);
> + dma_unmap_sgtable(attachment->dev, table, direction, attrs);
> }
>
> static int system_heap_dma_buf_begin_cpu_access(struct dma_buf
> *dmabuf,
> --
> 2.17.1
>
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next prev parent reply other threads:[~2021-07-15 6:26 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-08 10:14 [PATCH] dma-heap: Let dma heap use dma_map_attrs to map & unmap iova guangming.cao
2021-07-15 6:24 ` guangming.cao [this message]
2021-07-21 9:43 ` guangming.cao
2021-08-10 2:02 ` [PATCH] dma_heap: enable map_attrs when (un)map_attachment guangming.cao
2021-08-26 6:42 ` [PATCH] dma-buf: Add support for mapping buffers with DMA attributes guangming.cao
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