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drm/virtio: add dma sync for dma mapped virtio gpu framebuffer pages

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With virtio gpu ttm-pages being dma mapped, dma sync is needed when
swiotlb is used as bounce buffers, before TRANSFER_TO_HOST_2D/3D
commands are sent.

Signed-off-by: Jiandi An <jiandi.an@amd.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20180919070931.91168-1-jiandi.an@amd.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Jiandi An
2018-09-19 07:09:53 +00:00
committed by Gerd Hoffmann
parent 3536faefc0
commit 8f44ca2233
3 changed files with 26 additions and 7 deletions
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18
drivers/gpu/drm/virtio/virtgpu_vq.c
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@@ -490,6 +490,15 @@ void virtio_gpu_cmd_transfer_to_host_2d(struct virtio_gpu_device *vgdev,
{
struct virtio_gpu_transfer_to_host_2d *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
struct virtio_gpu_fbdev *vgfbdev = vgdev->vgfbdev;
struct virtio_gpu_framebuffer *fb = &vgfbdev->vgfb;
struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(fb->base.obj[0]);
bool use_dma_api = !virtio_has_iommu_quirk(vgdev->vdev);
if (use_dma_api)
dma_sync_sg_for_device(vgdev->vdev->dev.parent,
obj->pages->sgl, obj->pages->nents,
DMA_TO_DEVICE);
cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
memset(cmd_p, 0, sizeof(*cmd_p));
@@ -789,6 +798,15 @@ void virtio_gpu_cmd_transfer_to_host_3d(struct virtio_gpu_device *vgdev,
{
struct virtio_gpu_transfer_host_3d *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
struct virtio_gpu_fbdev *vgfbdev = vgdev->vgfbdev;
struct virtio_gpu_framebuffer *fb = &vgfbdev->vgfb;
struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(fb->base.obj[0]);
bool use_dma_api = !virtio_has_iommu_quirk(vgdev->vdev);
if (use_dma_api)
dma_sync_sg_for_device(vgdev->vdev->dev.parent,
obj->pages->sgl, obj->pages->nents,
DMA_TO_DEVICE);
cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
memset(cmd_p, 0, sizeof(*cmd_p));