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dma-buf: add enum dma_resv_usage v4

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This change adds the dma_resv_usage enum and allows us to specify why a
dma_resv object is queried for its containing fences.

Additional to that a dma_resv_usage_rw() helper function is added to aid
retrieving the fences for a read or write userspace submission.

This is then deployed to the different query functions of the dma_resv
object and all of their users. When the write paratermer was previously
true we now use DMA_RESV_USAGE_WRITE and DMA_RESV_USAGE_READ otherwise.

v2: add KERNEL/OTHER in separate patch
v3: some kerneldoc suggestions by Daniel
v4: some more kerneldoc suggestions by Daniel, fix missing cases lost in
    the rebase pointed out by Bas.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20220407085946.744568-2-christian.koenig@amd.com
This commit is contained in:
Christian König
2021-11-09 11:08:18 +01:00
parent 6e87601b7e
commit 7bc80a5462
46 changed files with 215 additions and 126 deletions
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5
drivers/gpu/drm/virtio/virtgpu_ioctl.c
View File

@@ -518,9 +518,10 @@ static int virtio_gpu_wait_ioctl(struct drm_device *dev, void *data,
return -ENOENT;
if (args->flags & VIRTGPU_WAIT_NOWAIT) {
ret = dma_resv_test_signaled(obj->resv, true);
ret = dma_resv_test_signaled(obj->resv, DMA_RESV_USAGE_READ);
} else {
ret = dma_resv_wait_timeout(obj->resv, true, true, timeout);
ret = dma_resv_wait_timeout(obj->resv, DMA_RESV_USAGE_READ,
true, timeout);
}
if (ret == 0)
ret = -EBUSY;