On Tue, May 07, 2019 at 10:13:32AM +0200, Christian König wrote:
> That is now done by the DMA-buf helpers instead.
>
> Signed-off-by: Christian König <christian.koe...@amd.com>
> ---
> drivers/gpu/drm/drm_prime.c | 76 ++++++++-----------------------------
> 1 file changed, 16 insertions(+), 60 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
> index 231e3f6d5f41..90f5230cc0d5 100644
> --- a/drivers/gpu/drm/drm_prime.c
> +++ b/drivers/gpu/drm/drm_prime.c
> @@ -86,11 +86,6 @@ struct drm_prime_member {
> struct rb_node handle_rb;
> };
>
> -struct drm_prime_attachment {
> - struct sg_table *sgt;
> - enum dma_data_direction dir;
> -};
> -
> static int drm_prime_add_buf_handle(struct drm_prime_file_private
> *prime_fpriv,
> struct dma_buf *dma_buf, uint32_t handle)
> {
> @@ -188,25 +183,16 @@ static int drm_prime_lookup_buf_handle(struct
> drm_prime_file_private *prime_fpri
> * @dma_buf: buffer to attach device to
> * @attach: buffer attachment data
> *
> - * Allocates &drm_prime_attachment and calls &drm_driver.gem_prime_pin for
> - * device specific attachment. This can be used as the &dma_buf_ops.attach
> - * callback.
> + * Calls &drm_driver.gem_prime_pin for device specific handling. This can be
> + * used as the &dma_buf_ops.attach callback.
> *
> * Returns 0 on success, negative error code on failure.
> */
> int drm_gem_map_attach(struct dma_buf *dma_buf,
> struct dma_buf_attachment *attach)
> {
> - struct drm_prime_attachment *prime_attach;
> struct drm_gem_object *obj = dma_buf->priv;
>
> - prime_attach = kzalloc(sizeof(*prime_attach), GFP_KERNEL);
> - if (!prime_attach)
> - return -ENOMEM;
> -
> - prime_attach->dir = DMA_NONE;
> - attach->priv = prime_attach;
> -
> return drm_gem_pin(obj);
> }
> EXPORT_SYMBOL(drm_gem_map_attach);
> @@ -222,26 +208,8 @@ EXPORT_SYMBOL(drm_gem_map_attach);
> void drm_gem_map_detach(struct dma_buf *dma_buf,
> struct dma_buf_attachment *attach)
> {
> - struct drm_prime_attachment *prime_attach = attach->priv;
> struct drm_gem_object *obj = dma_buf->priv;
>
> - if (prime_attach) {
> - struct sg_table *sgt = prime_attach->sgt;
> -
> - if (sgt) {
> - if (prime_attach->dir != DMA_NONE)
> - dma_unmap_sg_attrs(attach->dev, sgt->sgl,
> - sgt->nents,
> - prime_attach->dir,
> - DMA_ATTR_SKIP_CPU_SYNC);
> - sg_free_table(sgt);
> - }
> -
> - kfree(sgt);
> - kfree(prime_attach);
> - attach->priv = NULL;
> - }
> -
> drm_gem_unpin(obj);
> }
> EXPORT_SYMBOL(drm_gem_map_detach);
> @@ -286,39 +254,22 @@ void drm_prime_remove_buf_handle_locked(struct
> drm_prime_file_private *prime_fpr
> struct sg_table *drm_gem_map_dma_buf(struct dma_buf_attachment *attach,
> enum dma_data_direction dir)
> {
> - struct drm_prime_attachment *prime_attach = attach->priv;
> struct drm_gem_object *obj = attach->dmabuf->priv;
> struct sg_table *sgt;
>
> - if (WARN_ON(dir == DMA_NONE || !prime_attach))
> + if (WARN_ON(dir == DMA_NONE))
> return ERR_PTR(-EINVAL);
>
> - /* return the cached mapping when possible */
> - if (prime_attach->dir == dir)
> - return prime_attach->sgt;
> -
> - /*
> - * two mappings with different directions for the same attachment are
> - * not allowed
> - */
> - if (WARN_ON(prime_attach->dir != DMA_NONE))
> - return ERR_PTR(-EBUSY);
> -
> if (obj->funcs)
> sgt = obj->funcs->get_sg_table(obj);
> else
> sgt = obj->dev->driver->gem_prime_get_sg_table(obj);
>
> - if (!IS_ERR(sgt)) {
> - if (!dma_map_sg_attrs(attach->dev, sgt->sgl, sgt->nents, dir,
> - DMA_ATTR_SKIP_CPU_SYNC)) {
> - sg_free_table(sgt);
> - kfree(sgt);
> - sgt = ERR_PTR(-ENOMEM);
> - } else {
> - prime_attach->sgt = sgt;
> - prime_attach->dir = dir;
> - }
> + if (!dma_map_sg_attrs(attach->dev, sgt->sgl, sgt->nents, dir,
> + DMA_ATTR_SKIP_CPU_SYNC)) {
> + sg_free_table(sgt);
> + kfree(sgt);
> + sgt = ERR_PTR(-ENOMEM);
> }
>
> return sgt;
> @@ -331,14 +282,19 @@ EXPORT_SYMBOL(drm_gem_map_dma_buf);
> * @sgt: scatterlist info of the buffer to unmap
> * @dir: direction of DMA transfer
> *
> - * Not implemented. The unmap is done at drm_gem_map_detach(). This can be
> - * used as the &dma_buf_ops.unmap_dma_buf callback.
> + * This can be used as the &dma_buf_ops.unmap_dma_buf callback.
> */
> void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
> struct sg_table *sgt,
> enum dma_data_direction dir)
> {
> - /* nothing to be done here */
> + if (!sgt)
> + return;
This copypasta isn't needed anymore, it's a caller bug if you don't supply
an sgt here. The old caching code only needed it because it only cached
on-demand in the map callback. With that:
Reviewed-by: Daniel Vetter <daniel.vet...@ffwll.ch>
> +
> + dma_unmap_sg_attrs(attach->dev, sgt->sgl, sgt->nents, dir,
> + DMA_ATTR_SKIP_CPU_SYNC);
> + sg_free_table(sgt);
> + kfree(sgt);
> }
> EXPORT_SYMBOL(drm_gem_unmap_dma_buf);
>
> --
> 2.17.1
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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