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| author | Christian König <christian.koenig@amd.com> | 2018-03-22 17:09:42 +0100 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2020-04-01 09:02:45 +0200 |
| commit | 09606b5446c25b2c3b16c5bd2977eca730e3a570 (patch) | |
| tree | 51a5d6be165f26e8e7ffd28b7e496faf3b10f847 | |
| parent | bdf7e3b782efbc6ca8fd4d6cd663f14a00cafdad (diff) | |
| download | linux-09606b5446c25b2c3b16c5bd2977eca730e3a570.tar.gz | |
dma-buf: add peer2peer flag
Add a peer2peer flag noting that the importer can deal with device
resources which are not backed by pages.
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Link: https://patchwork.freedesktop.org/patch/359286/
| -rw-r--r-- | drivers/dma-buf/dma-buf.c | 2 | ||||
| -rw-r--r-- | include/linux/dma-buf.h | 10 |
2 files changed, 12 insertions, 0 deletions
diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index ccc9eda1bc28..570c923023e6 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -690,6 +690,8 @@ dma_buf_dynamic_attach(struct dma_buf *dmabuf, struct device *dev, attach->dev = dev; attach->dmabuf = dmabuf; + if (importer_ops) + attach->peer2peer = importer_ops->allow_peer2peer; attach->importer_ops = importer_ops; attach->importer_priv = importer_priv; diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h index 1ade486fc2bb..82e0a4a64601 100644 --- a/include/linux/dma-buf.h +++ b/include/linux/dma-buf.h @@ -335,6 +335,14 @@ struct dma_buf { */ struct dma_buf_attach_ops { /** + * @allow_peer2peer: + * + * If this is set to true the importer must be able to handle peer + * resources without struct pages. + */ + bool allow_peer2peer; + + /** * @move_notify * * If this callback is provided the framework can avoid pinning the @@ -362,6 +370,7 @@ struct dma_buf_attach_ops { * @node: list of dma_buf_attachment, protected by dma_resv lock of the dmabuf. * @sgt: cached mapping. * @dir: direction of cached mapping. + * @peer2peer: true if the importer can handle peer resources without pages. * @priv: exporter specific attachment data. * @importer_ops: importer operations for this attachment, if provided * dma_buf_map/unmap_attachment() must be called with the dma_resv lock held. @@ -382,6 +391,7 @@ struct dma_buf_attachment { struct list_head node; struct sg_table *sgt; enum dma_data_direction dir; + bool peer2peer; const struct dma_buf_attach_ops *importer_ops; void *importer_priv; void *priv; |