On 26-09-14 12:00, Lauri Peltonen wrote: > Allow user space to provide an explicit sync fence fd when exporting > a dma-buf from gem handle. The fence will be stored as the explicit > fence to the reservation object. > > Signed-off-by: Lauri Peltonen <lpeltonen@xxxxxxxxxx> > --- > drivers/gpu/drm/drm_prime.c | 41 +++++++++++++++++++++++++++++++++-------- > include/uapi/drm/drm.h | 9 ++++++++- > 2 files changed, 41 insertions(+), 9 deletions(-) > > diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c > index 2807a77..c69df2e 100644 > --- a/drivers/gpu/drm/drm_prime.c > +++ b/drivers/gpu/drm/drm_prime.c > @@ -28,8 +28,10 @@ > > #include <linux/export.h> > #include <linux/dma-buf.h> > +#include <linux/reservation.h> > #include <drm/drmP.h> > #include "drm_internal.h" > +#include "../../staging/android/sync.h" > > /* > * DMA-BUF/GEM Object references and lifetime overview: > @@ -329,7 +331,7 @@ static const struct dma_buf_ops drm_gem_prime_dmabuf_ops = { > * drm_gem_prime_export - helper library implemention of the export callback > * @dev: drm_device to export from > * @obj: GEM object to export > - * @flags: flags like DRM_CLOEXEC > + * @flags: flags like DRM_CLOEXEC or DRM_SYNC_FD > * > * This is the implementation of the gem_prime_export functions for GEM drivers > * using the PRIME helpers. > @@ -385,7 +387,7 @@ static struct dma_buf *export_and_register_object(struct drm_device *dev, > * @dev: dev to export the buffer from > * @file_priv: drm file-private structure > * @handle: buffer handle to export > - * @flags: flags like DRM_CLOEXEC > + * @flags: flags like DRM_CLOEXEC or DRM_SYNC_FD > * @prime_fd: pointer to storage for the fd id of the create dma-buf > * > * This is the PRIME export function which must be used mandatorily by GEM > @@ -401,6 +403,24 @@ int drm_gem_prime_handle_to_fd(struct drm_device *dev, > struct drm_gem_object *obj; > int ret = 0; > struct dma_buf *dmabuf; > + struct fence *fence = NULL; > + > + if (flags & DRM_SYNC_FD) { > +#ifdef CONFIG_SYNC > + struct sync_fence *sf = sync_fence_fdget(*prime_fd); > + if (!sf) > + return -ENOENT; > + if (sf->num_fences != 1) { > + sync_fence_put(sf); > + return -EINVAL; > + } > + fence = fence_get(sf->cbs[0].sync_pt); > + sync_fence_put(sf); > + flags &= ~DRM_SYNC_FD; > +#else > + return -ENODEV; > +#endif > + } > > mutex_lock(&file_priv->prime.lock); > obj = drm_gem_object_lookup(dev, file_priv, handle); > @@ -453,6 +473,14 @@ out_have_obj: > goto fail_put_dmabuf; > > out_have_handle: > + if (fence) { > + if (!dmabuf->resv) { > + ret = -ENODEV; > + goto fail_put_dmabuf; > + } This is never true. A default resv gets allocated, see dma_buf's create function. ~Maarten ~Maarten _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel