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| author | Maxime Coquelin <maxime.coquelin@redhat.com> | 2024-02-19 18:06:06 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-03-19 07:45:49 +0100 |
| commit | d7b4e3287ca3a7baf66efd9158498e551a9550da (patch) | |
| tree | 8175cee3b84db3c9bafb4ba10b9626945475359b /drivers/vdpa/pds/vdpa_dev.c | |
| parent | vdpa/mlx5: Allow CVQ size changes (diff) | |
| download | linux-d7b4e3287ca3a7baf66efd9158498e551a9550da.tar.xz linux-d7b4e3287ca3a7baf66efd9158498e551a9550da.zip | |
vduse: implement DMA sync callbacks
Since commit 295525e29a5b ("virtio_net: merge dma
operations when filling mergeable buffers"), VDUSE device
require support for DMA's .sync_single_for_cpu() operation
as the memory is non-coherent between the device and CPU
because of the use of a bounce buffer.
This patch implements both .sync_single_for_cpu() and
.sync_single_for_device() callbacks, and also skip bounce
buffer copies during DMA map and unmap operations if the
DMA_ATTR_SKIP_CPU_SYNC attribute is set to avoid extra
copies of the same buffer.
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Message-Id: <20240219170606.587290-1-maxime.coquelin@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vdpa/pds/vdpa_dev.c')
0 files changed, 0 insertions, 0 deletions