Implement vmap/vunmap so we can export dmabufs to
other drivers, such as video4linux.
Tested with a virtio-gpu / vivid (virtual capture driver)
pipeline, where the vivid driver imports the dmabufs exported
by virtio-gpu.
Note that dma_buf_vmap() does its own vmap counting, so
it's not needed to take care of it in the driver.
Signed-off-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxx>
---
drivers/gpu/drm/virtio/virtgpu_prime.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/virtio/virtgpu_prime.c b/drivers/gpu/drm/virtio/virtgpu_prime.c
index d27a1688714f..86ce0ae93f59 100644
--- a/drivers/gpu/drm/virtio/virtgpu_prime.c
+++ b/drivers/gpu/drm/virtio/virtgpu_prime.c
@@ -55,13 +55,18 @@ struct drm_gem_object *virtgpu_gem_prime_import_sg_table(
void *virtgpu_gem_prime_vmap(struct drm_gem_object *obj)
{
- WARN_ONCE(1, "not implemented");
- return ERR_PTR(-ENODEV);
+ struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
+ int ret;
+
+ ret = virtio_gpu_object_kmap(bo);
+ if (ret)
+ return NULL;
+ return bo->vmap;
}
void virtgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
{
- WARN_ONCE(1, "not implemented");
+ virtio_gpu_object_kunmap(gem_to_virtio_gpu_obj(obj));
}
int virtgpu_gem_prime_mmap(struct drm_gem_object *obj,
--
2.19.0.rc2
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