drm/prime: Shuffle functions.
Reorder all the functions in drm_prime.[hc] into three groups: core, export helpers, import helpers. Not other changes beyond moving the functions and their unchanged kerneldoc around in here. Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Eric Anholt <eric@anholt.net> Cc: Emil Velikov <emil.l.velikov@gmail.com> Acked-by: Gerd Hoffmann <kraxel@redhat.com> Acked-by: Emil Velikov <emil.velikov@collabora.com> Acked-by: Noralf Trønnes <noralf@tronnes.org> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190618092038.17929-1-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter
Родитель
b8142e3a63
Коммит
b283e92a23
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@ -181,42 +181,6 @@ static int drm_prime_lookup_buf_handle(struct drm_prime_file_private *prime_fpri
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return -ENOENT;
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}
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/**
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* drm_gem_map_attach - dma_buf attach implementation for GEM
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* @dma_buf: buffer to attach device to
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* @attach: buffer attachment data
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*
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* Calls &drm_driver.gem_prime_pin for device specific handling. This can be
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* used as the &dma_buf_ops.attach callback.
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*
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* Returns 0 on success, negative error code on failure.
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*/
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int drm_gem_map_attach(struct dma_buf *dma_buf,
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struct dma_buf_attachment *attach)
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{
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struct drm_gem_object *obj = dma_buf->priv;
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return drm_gem_pin(obj);
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}
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EXPORT_SYMBOL(drm_gem_map_attach);
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/**
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* drm_gem_map_detach - dma_buf detach implementation for GEM
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* @dma_buf: buffer to detach from
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* @attach: attachment to be detached
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*
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* Cleans up &dma_buf_attachment. This can be used as the &dma_buf_ops.detach
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* callback.
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*/
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void drm_gem_map_detach(struct dma_buf *dma_buf,
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struct dma_buf_attachment *attach)
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{
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struct drm_gem_object *obj = dma_buf->priv;
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drm_gem_unpin(obj);
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}
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EXPORT_SYMBOL(drm_gem_map_detach);
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void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpriv,
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struct dma_buf *dma_buf)
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{
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@ -242,64 +206,18 @@ void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpr
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}
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}
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/**
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* drm_gem_map_dma_buf - map_dma_buf implementation for GEM
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* @attach: attachment whose scatterlist is to be returned
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* @dir: direction of DMA transfer
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*
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* Calls &drm_driver.gem_prime_get_sg_table and then maps the scatterlist. This
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* can be used as the &dma_buf_ops.map_dma_buf callback.
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*
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* Returns sg_table containing the scatterlist to be returned; returns ERR_PTR
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* on error. May return -EINTR if it is interrupted by a signal.
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*/
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struct sg_table *drm_gem_map_dma_buf(struct dma_buf_attachment *attach,
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enum dma_data_direction dir)
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void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv)
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{
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struct drm_gem_object *obj = attach->dmabuf->priv;
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struct sg_table *sgt;
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if (WARN_ON(dir == DMA_NONE))
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return ERR_PTR(-EINVAL);
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if (obj->funcs)
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sgt = obj->funcs->get_sg_table(obj);
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else
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sgt = obj->dev->driver->gem_prime_get_sg_table(obj);
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if (!dma_map_sg_attrs(attach->dev, sgt->sgl, sgt->nents, dir,
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DMA_ATTR_SKIP_CPU_SYNC)) {
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sg_free_table(sgt);
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kfree(sgt);
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sgt = ERR_PTR(-ENOMEM);
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}
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return sgt;
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mutex_init(&prime_fpriv->lock);
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prime_fpriv->dmabufs = RB_ROOT;
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prime_fpriv->handles = RB_ROOT;
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}
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EXPORT_SYMBOL(drm_gem_map_dma_buf);
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/**
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* drm_gem_unmap_dma_buf - unmap_dma_buf implementation for GEM
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* @attach: attachment to unmap buffer from
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* @sgt: scatterlist info of the buffer to unmap
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* @dir: direction of DMA transfer
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*
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* This can be used as the &dma_buf_ops.unmap_dma_buf callback.
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*/
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void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
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struct sg_table *sgt,
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enum dma_data_direction dir)
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void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv)
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{
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if (!sgt)
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return;
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dma_unmap_sg_attrs(attach->dev, sgt->sgl, sgt->nents, dir,
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DMA_ATTR_SKIP_CPU_SYNC);
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sg_free_table(sgt);
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kfree(sgt);
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/* by now drm_gem_release should've made sure the list is empty */
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WARN_ON(!RB_EMPTY_ROOT(&prime_fpriv->dmabufs));
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}
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EXPORT_SYMBOL(drm_gem_unmap_dma_buf);
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/**
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* drm_gem_dmabuf_export - dma_buf export implementation for GEM
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@ -351,128 +269,101 @@ void drm_gem_dmabuf_release(struct dma_buf *dma_buf)
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EXPORT_SYMBOL(drm_gem_dmabuf_release);
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/**
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* drm_gem_dmabuf_vmap - dma_buf vmap implementation for GEM
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* @dma_buf: buffer to be mapped
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* drm_gem_prime_fd_to_handle - PRIME import function for GEM drivers
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* @dev: dev to export the buffer from
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* @file_priv: drm file-private structure
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* @prime_fd: fd id of the dma-buf which should be imported
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* @handle: pointer to storage for the handle of the imported buffer object
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*
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* Sets up a kernel virtual mapping. This can be used as the &dma_buf_ops.vmap
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* callback.
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*
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* Returns the kernel virtual address.
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* This is the PRIME import function which must be used mandatorily by GEM
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* drivers to ensure correct lifetime management of the underlying GEM object.
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* The actual importing of GEM object from the dma-buf is done through the
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* gem_import_export driver callback.
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*/
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void *drm_gem_dmabuf_vmap(struct dma_buf *dma_buf)
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int drm_gem_prime_fd_to_handle(struct drm_device *dev,
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struct drm_file *file_priv, int prime_fd,
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uint32_t *handle)
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{
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struct drm_gem_object *obj = dma_buf->priv;
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void *vaddr;
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struct dma_buf *dma_buf;
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struct drm_gem_object *obj;
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int ret;
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vaddr = drm_gem_vmap(obj);
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if (IS_ERR(vaddr))
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vaddr = NULL;
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dma_buf = dma_buf_get(prime_fd);
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if (IS_ERR(dma_buf))
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return PTR_ERR(dma_buf);
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return vaddr;
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mutex_lock(&file_priv->prime.lock);
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ret = drm_prime_lookup_buf_handle(&file_priv->prime,
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dma_buf, handle);
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if (ret == 0)
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goto out_put;
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/* never seen this one, need to import */
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mutex_lock(&dev->object_name_lock);
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if (dev->driver->gem_prime_import)
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obj = dev->driver->gem_prime_import(dev, dma_buf);
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else
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obj = drm_gem_prime_import(dev, dma_buf);
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if (IS_ERR(obj)) {
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ret = PTR_ERR(obj);
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goto out_unlock;
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}
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if (obj->dma_buf) {
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WARN_ON(obj->dma_buf != dma_buf);
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} else {
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obj->dma_buf = dma_buf;
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get_dma_buf(dma_buf);
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}
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/* _handle_create_tail unconditionally unlocks dev->object_name_lock. */
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ret = drm_gem_handle_create_tail(file_priv, obj, handle);
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drm_gem_object_put_unlocked(obj);
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if (ret)
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goto out_put;
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ret = drm_prime_add_buf_handle(&file_priv->prime,
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dma_buf, *handle);
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mutex_unlock(&file_priv->prime.lock);
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if (ret)
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goto fail;
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dma_buf_put(dma_buf);
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return 0;
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fail:
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/* hmm, if driver attached, we are relying on the free-object path
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* to detach.. which seems ok..
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*/
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drm_gem_handle_delete(file_priv, *handle);
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dma_buf_put(dma_buf);
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return ret;
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out_unlock:
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mutex_unlock(&dev->object_name_lock);
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out_put:
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mutex_unlock(&file_priv->prime.lock);
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dma_buf_put(dma_buf);
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return ret;
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}
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EXPORT_SYMBOL(drm_gem_dmabuf_vmap);
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EXPORT_SYMBOL(drm_gem_prime_fd_to_handle);
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/**
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* drm_gem_dmabuf_vunmap - dma_buf vunmap implementation for GEM
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* @dma_buf: buffer to be unmapped
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* @vaddr: the virtual address of the buffer
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*
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* Releases a kernel virtual mapping. This can be used as the
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* &dma_buf_ops.vunmap callback.
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*/
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void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr)
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int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct drm_gem_object *obj = dma_buf->priv;
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struct drm_prime_handle *args = data;
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drm_gem_vunmap(obj, vaddr);
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}
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EXPORT_SYMBOL(drm_gem_dmabuf_vunmap);
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if (!drm_core_check_feature(dev, DRIVER_PRIME))
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return -EOPNOTSUPP;
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/**
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* drm_gem_dmabuf_mmap - dma_buf mmap implementation for GEM
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* @dma_buf: buffer to be mapped
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* @vma: virtual address range
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*
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* Provides memory mapping for the buffer. This can be used as the
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* &dma_buf_ops.mmap callback.
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*
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* Returns 0 on success or a negative error code on failure.
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*/
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int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma)
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{
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struct drm_gem_object *obj = dma_buf->priv;
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struct drm_device *dev = obj->dev;
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if (!dev->driver->gem_prime_mmap)
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if (!dev->driver->prime_fd_to_handle)
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return -ENOSYS;
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return dev->driver->gem_prime_mmap(obj, vma);
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return dev->driver->prime_fd_to_handle(dev, file_priv,
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args->fd, &args->handle);
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}
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EXPORT_SYMBOL(drm_gem_dmabuf_mmap);
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static const struct dma_buf_ops drm_gem_prime_dmabuf_ops = {
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.cache_sgt_mapping = true,
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.attach = drm_gem_map_attach,
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.detach = drm_gem_map_detach,
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.map_dma_buf = drm_gem_map_dma_buf,
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.unmap_dma_buf = drm_gem_unmap_dma_buf,
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.release = drm_gem_dmabuf_release,
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.mmap = drm_gem_dmabuf_mmap,
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.vmap = drm_gem_dmabuf_vmap,
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.vunmap = drm_gem_dmabuf_vunmap,
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};
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/**
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* DOC: PRIME Helpers
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*
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* Drivers can implement @gem_prime_export and @gem_prime_import in terms of
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* simpler APIs by using the helper functions @drm_gem_prime_export and
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* @drm_gem_prime_import. These functions implement dma-buf support in terms of
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* six lower-level driver callbacks:
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*
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* Export callbacks:
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*
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* * @gem_prime_pin (optional): prepare a GEM object for exporting
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* * @gem_prime_get_sg_table: provide a scatter/gather table of pinned pages
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* * @gem_prime_vmap: vmap a buffer exported by your driver
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* * @gem_prime_vunmap: vunmap a buffer exported by your driver
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* * @gem_prime_mmap (optional): mmap a buffer exported by your driver
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*
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* Import callback:
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*
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* * @gem_prime_import_sg_table (import): produce a GEM object from another
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* driver's scatter/gather table
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*/
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/**
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* drm_gem_prime_export - helper library implementation of the export callback
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* @dev: drm_device to export from
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* @obj: GEM object to export
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* @flags: flags like DRM_CLOEXEC and DRM_RDWR
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*
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* This is the implementation of the gem_prime_export functions for GEM drivers
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* using the PRIME helpers.
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*/
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struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
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struct drm_gem_object *obj,
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int flags)
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{
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struct dma_buf_export_info exp_info = {
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.exp_name = KBUILD_MODNAME, /* white lie for debug */
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.owner = dev->driver->fops->owner,
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.ops = &drm_gem_prime_dmabuf_ops,
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.size = obj->size,
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.flags = flags,
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.priv = obj,
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.resv = obj->resv,
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};
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if (dev->driver->gem_prime_res_obj)
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exp_info.resv = dev->driver->gem_prime_res_obj(obj);
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return drm_gem_dmabuf_export(dev, &exp_info);
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}
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EXPORT_SYMBOL(drm_gem_prime_export);
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static struct dma_buf *export_and_register_object(struct drm_device *dev,
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struct drm_gem_object *obj,
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@ -610,6 +501,180 @@ out_unlock:
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}
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EXPORT_SYMBOL(drm_gem_prime_handle_to_fd);
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int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct drm_prime_handle *args = data;
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if (!drm_core_check_feature(dev, DRIVER_PRIME))
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return -EOPNOTSUPP;
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if (!dev->driver->prime_handle_to_fd)
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return -ENOSYS;
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/* check flags are valid */
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if (args->flags & ~(DRM_CLOEXEC | DRM_RDWR))
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return -EINVAL;
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return dev->driver->prime_handle_to_fd(dev, file_priv,
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args->handle, args->flags, &args->fd);
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}
|
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|
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/**
|
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* DOC: PRIME Helpers
|
||||
*
|
||||
* Drivers can implement @gem_prime_export and @gem_prime_import in terms of
|
||||
* simpler APIs by using the helper functions @drm_gem_prime_export and
|
||||
* @drm_gem_prime_import. These functions implement dma-buf support in terms of
|
||||
* six lower-level driver callbacks:
|
||||
*
|
||||
* Export callbacks:
|
||||
*
|
||||
* * @gem_prime_pin (optional): prepare a GEM object for exporting
|
||||
* * @gem_prime_get_sg_table: provide a scatter/gather table of pinned pages
|
||||
* * @gem_prime_vmap: vmap a buffer exported by your driver
|
||||
* * @gem_prime_vunmap: vunmap a buffer exported by your driver
|
||||
* * @gem_prime_mmap (optional): mmap a buffer exported by your driver
|
||||
*
|
||||
* Import callback:
|
||||
*
|
||||
* * @gem_prime_import_sg_table (import): produce a GEM object from another
|
||||
* driver's scatter/gather table
|
||||
*/
|
||||
|
||||
/**
|
||||
* drm_gem_map_attach - dma_buf attach implementation for GEM
|
||||
* @dma_buf: buffer to attach device to
|
||||
* @attach: buffer attachment data
|
||||
*
|
||||
* 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_gem_object *obj = dma_buf->priv;
|
||||
|
||||
return drm_gem_pin(obj);
|
||||
}
|
||||
EXPORT_SYMBOL(drm_gem_map_attach);
|
||||
|
||||
/**
|
||||
* drm_gem_map_detach - dma_buf detach implementation for GEM
|
||||
* @dma_buf: buffer to detach from
|
||||
* @attach: attachment to be detached
|
||||
*
|
||||
* Cleans up &dma_buf_attachment. This can be used as the &dma_buf_ops.detach
|
||||
* callback.
|
||||
*/
|
||||
void drm_gem_map_detach(struct dma_buf *dma_buf,
|
||||
struct dma_buf_attachment *attach)
|
||||
{
|
||||
struct drm_gem_object *obj = dma_buf->priv;
|
||||
|
||||
drm_gem_unpin(obj);
|
||||
}
|
||||
EXPORT_SYMBOL(drm_gem_map_detach);
|
||||
|
||||
/**
|
||||
* drm_gem_map_dma_buf - map_dma_buf implementation for GEM
|
||||
* @attach: attachment whose scatterlist is to be returned
|
||||
* @dir: direction of DMA transfer
|
||||
*
|
||||
* Calls &drm_driver.gem_prime_get_sg_table and then maps the scatterlist. This
|
||||
* can be used as the &dma_buf_ops.map_dma_buf callback.
|
||||
*
|
||||
* Returns sg_table containing the scatterlist to be returned; returns ERR_PTR
|
||||
* on error. May return -EINTR if it is interrupted by a signal.
|
||||
*/
|
||||
|
||||
struct sg_table *drm_gem_map_dma_buf(struct dma_buf_attachment *attach,
|
||||
enum dma_data_direction dir)
|
||||
{
|
||||
struct drm_gem_object *obj = attach->dmabuf->priv;
|
||||
struct sg_table *sgt;
|
||||
|
||||
if (WARN_ON(dir == DMA_NONE))
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
||||
if (obj->funcs)
|
||||
sgt = obj->funcs->get_sg_table(obj);
|
||||
else
|
||||
sgt = obj->dev->driver->gem_prime_get_sg_table(obj);
|
||||
|
||||
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;
|
||||
}
|
||||
EXPORT_SYMBOL(drm_gem_map_dma_buf);
|
||||
|
||||
/**
|
||||
* drm_gem_unmap_dma_buf - unmap_dma_buf implementation for GEM
|
||||
* @attach: attachment to unmap buffer from
|
||||
* @sgt: scatterlist info of the buffer to unmap
|
||||
* @dir: direction of DMA transfer
|
||||
*
|
||||
* 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)
|
||||
{
|
||||
if (!sgt)
|
||||
return;
|
||||
|
||||
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);
|
||||
|
||||
/**
|
||||
* drm_gem_dmabuf_vmap - dma_buf vmap implementation for GEM
|
||||
* @dma_buf: buffer to be mapped
|
||||
*
|
||||
* Sets up a kernel virtual mapping. This can be used as the &dma_buf_ops.vmap
|
||||
* callback.
|
||||
*
|
||||
* Returns the kernel virtual address.
|
||||
*/
|
||||
void *drm_gem_dmabuf_vmap(struct dma_buf *dma_buf)
|
||||
{
|
||||
struct drm_gem_object *obj = dma_buf->priv;
|
||||
void *vaddr;
|
||||
|
||||
vaddr = drm_gem_vmap(obj);
|
||||
if (IS_ERR(vaddr))
|
||||
vaddr = NULL;
|
||||
|
||||
return vaddr;
|
||||
}
|
||||
EXPORT_SYMBOL(drm_gem_dmabuf_vmap);
|
||||
|
||||
/**
|
||||
* drm_gem_dmabuf_vunmap - dma_buf vunmap implementation for GEM
|
||||
* @dma_buf: buffer to be unmapped
|
||||
* @vaddr: the virtual address of the buffer
|
||||
*
|
||||
* Releases a kernel virtual mapping. This can be used as the
|
||||
* &dma_buf_ops.vunmap callback.
|
||||
*/
|
||||
void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr)
|
||||
{
|
||||
struct drm_gem_object *obj = dma_buf->priv;
|
||||
|
||||
drm_gem_vunmap(obj, vaddr);
|
||||
}
|
||||
EXPORT_SYMBOL(drm_gem_dmabuf_vunmap);
|
||||
|
||||
/**
|
||||
* drm_gem_prime_mmap - PRIME mmap function for GEM drivers
|
||||
* @obj: GEM object
|
||||
|
|
@ -656,6 +721,102 @@ out:
|
|||
}
|
||||
EXPORT_SYMBOL(drm_gem_prime_mmap);
|
||||
|
||||
/**
|
||||
* drm_gem_dmabuf_mmap - dma_buf mmap implementation for GEM
|
||||
* @dma_buf: buffer to be mapped
|
||||
* @vma: virtual address range
|
||||
*
|
||||
* Provides memory mapping for the buffer. This can be used as the
|
||||
* &dma_buf_ops.mmap callback.
|
||||
*
|
||||
* Returns 0 on success or a negative error code on failure.
|
||||
*/
|
||||
int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma)
|
||||
{
|
||||
struct drm_gem_object *obj = dma_buf->priv;
|
||||
struct drm_device *dev = obj->dev;
|
||||
|
||||
if (!dev->driver->gem_prime_mmap)
|
||||
return -ENOSYS;
|
||||
|
||||
return dev->driver->gem_prime_mmap(obj, vma);
|
||||
}
|
||||
EXPORT_SYMBOL(drm_gem_dmabuf_mmap);
|
||||
|
||||
static const struct dma_buf_ops drm_gem_prime_dmabuf_ops = {
|
||||
.cache_sgt_mapping = true,
|
||||
.attach = drm_gem_map_attach,
|
||||
.detach = drm_gem_map_detach,
|
||||
.map_dma_buf = drm_gem_map_dma_buf,
|
||||
.unmap_dma_buf = drm_gem_unmap_dma_buf,
|
||||
.release = drm_gem_dmabuf_release,
|
||||
.mmap = drm_gem_dmabuf_mmap,
|
||||
.vmap = drm_gem_dmabuf_vmap,
|
||||
.vunmap = drm_gem_dmabuf_vunmap,
|
||||
};
|
||||
|
||||
/**
|
||||
* drm_prime_pages_to_sg - converts a page array into an sg list
|
||||
* @pages: pointer to the array of page pointers to convert
|
||||
* @nr_pages: length of the page vector
|
||||
*
|
||||
* This helper creates an sg table object from a set of pages
|
||||
* the driver is responsible for mapping the pages into the
|
||||
* importers address space for use with dma_buf itself.
|
||||
*/
|
||||
struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages)
|
||||
{
|
||||
struct sg_table *sg = NULL;
|
||||
int ret;
|
||||
|
||||
sg = kmalloc(sizeof(struct sg_table), GFP_KERNEL);
|
||||
if (!sg) {
|
||||
ret = -ENOMEM;
|
||||
goto out;
|
||||
}
|
||||
|
||||
ret = sg_alloc_table_from_pages(sg, pages, nr_pages, 0,
|
||||
nr_pages << PAGE_SHIFT, GFP_KERNEL);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
return sg;
|
||||
out:
|
||||
kfree(sg);
|
||||
return ERR_PTR(ret);
|
||||
}
|
||||
EXPORT_SYMBOL(drm_prime_pages_to_sg);
|
||||
|
||||
/**
|
||||
* drm_gem_prime_export - helper library implementation of the export callback
|
||||
* @dev: drm_device to export from
|
||||
* @obj: GEM object to export
|
||||
* @flags: flags like DRM_CLOEXEC and DRM_RDWR
|
||||
*
|
||||
* This is the implementation of the gem_prime_export functions for GEM drivers
|
||||
* using the PRIME helpers.
|
||||
*/
|
||||
struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
|
||||
struct drm_gem_object *obj,
|
||||
int flags)
|
||||
{
|
||||
struct dma_buf_export_info exp_info = {
|
||||
.exp_name = KBUILD_MODNAME, /* white lie for debug */
|
||||
.owner = dev->driver->fops->owner,
|
||||
.ops = &drm_gem_prime_dmabuf_ops,
|
||||
.size = obj->size,
|
||||
.flags = flags,
|
||||
.priv = obj,
|
||||
.resv = obj->resv,
|
||||
};
|
||||
|
||||
if (dev->driver->gem_prime_res_obj)
|
||||
exp_info.resv = dev->driver->gem_prime_res_obj(obj);
|
||||
|
||||
return drm_gem_dmabuf_export(dev, &exp_info);
|
||||
}
|
||||
EXPORT_SYMBOL(drm_gem_prime_export);
|
||||
|
||||
/**
|
||||
* drm_gem_prime_import_dev - core implementation of the import callback
|
||||
* @dev: drm_device to import into
|
||||
|
|
@ -737,154 +898,6 @@ struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
|
|||
}
|
||||
EXPORT_SYMBOL(drm_gem_prime_import);
|
||||
|
||||
/**
|
||||
* drm_gem_prime_fd_to_handle - PRIME import function for GEM drivers
|
||||
* @dev: dev to export the buffer from
|
||||
* @file_priv: drm file-private structure
|
||||
* @prime_fd: fd id of the dma-buf which should be imported
|
||||
* @handle: pointer to storage for the handle of the imported buffer object
|
||||
*
|
||||
* This is the PRIME import function which must be used mandatorily by GEM
|
||||
* drivers to ensure correct lifetime management of the underlying GEM object.
|
||||
* The actual importing of GEM object from the dma-buf is done through the
|
||||
* gem_import_export driver callback.
|
||||
*/
|
||||
int drm_gem_prime_fd_to_handle(struct drm_device *dev,
|
||||
struct drm_file *file_priv, int prime_fd,
|
||||
uint32_t *handle)
|
||||
{
|
||||
struct dma_buf *dma_buf;
|
||||
struct drm_gem_object *obj;
|
||||
int ret;
|
||||
|
||||
dma_buf = dma_buf_get(prime_fd);
|
||||
if (IS_ERR(dma_buf))
|
||||
return PTR_ERR(dma_buf);
|
||||
|
||||
mutex_lock(&file_priv->prime.lock);
|
||||
|
||||
ret = drm_prime_lookup_buf_handle(&file_priv->prime,
|
||||
dma_buf, handle);
|
||||
if (ret == 0)
|
||||
goto out_put;
|
||||
|
||||
/* never seen this one, need to import */
|
||||
mutex_lock(&dev->object_name_lock);
|
||||
if (dev->driver->gem_prime_import)
|
||||
obj = dev->driver->gem_prime_import(dev, dma_buf);
|
||||
else
|
||||
obj = drm_gem_prime_import(dev, dma_buf);
|
||||
if (IS_ERR(obj)) {
|
||||
ret = PTR_ERR(obj);
|
||||
goto out_unlock;
|
||||
}
|
||||
|
||||
if (obj->dma_buf) {
|
||||
WARN_ON(obj->dma_buf != dma_buf);
|
||||
} else {
|
||||
obj->dma_buf = dma_buf;
|
||||
get_dma_buf(dma_buf);
|
||||
}
|
||||
|
||||
/* _handle_create_tail unconditionally unlocks dev->object_name_lock. */
|
||||
ret = drm_gem_handle_create_tail(file_priv, obj, handle);
|
||||
drm_gem_object_put_unlocked(obj);
|
||||
if (ret)
|
||||
goto out_put;
|
||||
|
||||
ret = drm_prime_add_buf_handle(&file_priv->prime,
|
||||
dma_buf, *handle);
|
||||
mutex_unlock(&file_priv->prime.lock);
|
||||
if (ret)
|
||||
goto fail;
|
||||
|
||||
dma_buf_put(dma_buf);
|
||||
|
||||
return 0;
|
||||
|
||||
fail:
|
||||
/* hmm, if driver attached, we are relying on the free-object path
|
||||
* to detach.. which seems ok..
|
||||
*/
|
||||
drm_gem_handle_delete(file_priv, *handle);
|
||||
dma_buf_put(dma_buf);
|
||||
return ret;
|
||||
|
||||
out_unlock:
|
||||
mutex_unlock(&dev->object_name_lock);
|
||||
out_put:
|
||||
mutex_unlock(&file_priv->prime.lock);
|
||||
dma_buf_put(dma_buf);
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL(drm_gem_prime_fd_to_handle);
|
||||
|
||||
int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
|
||||
struct drm_file *file_priv)
|
||||
{
|
||||
struct drm_prime_handle *args = data;
|
||||
|
||||
if (!drm_core_check_feature(dev, DRIVER_PRIME))
|
||||
return -EOPNOTSUPP;
|
||||
|
||||
if (!dev->driver->prime_handle_to_fd)
|
||||
return -ENOSYS;
|
||||
|
||||
/* check flags are valid */
|
||||
if (args->flags & ~(DRM_CLOEXEC | DRM_RDWR))
|
||||
return -EINVAL;
|
||||
|
||||
return dev->driver->prime_handle_to_fd(dev, file_priv,
|
||||
args->handle, args->flags, &args->fd);
|
||||
}
|
||||
|
||||
int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
|
||||
struct drm_file *file_priv)
|
||||
{
|
||||
struct drm_prime_handle *args = data;
|
||||
|
||||
if (!drm_core_check_feature(dev, DRIVER_PRIME))
|
||||
return -EOPNOTSUPP;
|
||||
|
||||
if (!dev->driver->prime_fd_to_handle)
|
||||
return -ENOSYS;
|
||||
|
||||
return dev->driver->prime_fd_to_handle(dev, file_priv,
|
||||
args->fd, &args->handle);
|
||||
}
|
||||
|
||||
/**
|
||||
* drm_prime_pages_to_sg - converts a page array into an sg list
|
||||
* @pages: pointer to the array of page pointers to convert
|
||||
* @nr_pages: length of the page vector
|
||||
*
|
||||
* This helper creates an sg table object from a set of pages
|
||||
* the driver is responsible for mapping the pages into the
|
||||
* importers address space for use with dma_buf itself.
|
||||
*/
|
||||
struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages)
|
||||
{
|
||||
struct sg_table *sg = NULL;
|
||||
int ret;
|
||||
|
||||
sg = kmalloc(sizeof(struct sg_table), GFP_KERNEL);
|
||||
if (!sg) {
|
||||
ret = -ENOMEM;
|
||||
goto out;
|
||||
}
|
||||
|
||||
ret = sg_alloc_table_from_pages(sg, pages, nr_pages, 0,
|
||||
nr_pages << PAGE_SHIFT, GFP_KERNEL);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
return sg;
|
||||
out:
|
||||
kfree(sg);
|
||||
return ERR_PTR(ret);
|
||||
}
|
||||
EXPORT_SYMBOL(drm_prime_pages_to_sg);
|
||||
|
||||
/**
|
||||
* drm_prime_sg_to_page_addr_arrays - convert an sg table into a page array
|
||||
* @sgt: scatter-gather table to convert
|
||||
|
|
@ -949,16 +962,3 @@ void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg)
|
|||
dma_buf_put(dma_buf);
|
||||
}
|
||||
EXPORT_SYMBOL(drm_prime_gem_destroy);
|
||||
|
||||
void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv)
|
||||
{
|
||||
mutex_init(&prime_fpriv->lock);
|
||||
prime_fpriv->dmabufs = RB_ROOT;
|
||||
prime_fpriv->handles = RB_ROOT;
|
||||
}
|
||||
|
||||
void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv)
|
||||
{
|
||||
/* by now drm_gem_release should've made sure the list is empty */
|
||||
WARN_ON(!RB_EMPTY_ROOT(&prime_fpriv->dmabufs));
|
||||
}
|
||||
|
|
|
|||
|
|
@ -42,7 +42,6 @@
|
|||
* This just contains the internal &struct dma_buf and handle caches for each
|
||||
* &struct drm_file used by the PRIME core code.
|
||||
*/
|
||||
|
||||
struct drm_prime_file_private {
|
||||
/* private: */
|
||||
struct mutex lock;
|
||||
|
|
@ -64,25 +63,18 @@ struct drm_file;
|
|||
|
||||
struct device;
|
||||
|
||||
struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
|
||||
struct drm_gem_object *obj,
|
||||
int flags);
|
||||
int drm_gem_prime_handle_to_fd(struct drm_device *dev,
|
||||
struct drm_file *file_priv, uint32_t handle, uint32_t flags,
|
||||
int *prime_fd);
|
||||
int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
|
||||
struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
|
||||
struct dma_buf *dma_buf);
|
||||
|
||||
struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev,
|
||||
struct dma_buf *dma_buf,
|
||||
struct device *attach_dev);
|
||||
|
||||
int drm_gem_prime_fd_to_handle(struct drm_device *dev,
|
||||
struct drm_file *file_priv, int prime_fd, uint32_t *handle);
|
||||
/* core prime functions */
|
||||
struct dma_buf *drm_gem_dmabuf_export(struct drm_device *dev,
|
||||
struct dma_buf_export_info *exp_info);
|
||||
void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
|
||||
|
||||
int drm_gem_prime_fd_to_handle(struct drm_device *dev,
|
||||
struct drm_file *file_priv, int prime_fd, uint32_t *handle);
|
||||
int drm_gem_prime_handle_to_fd(struct drm_device *dev,
|
||||
struct drm_file *file_priv, uint32_t handle, uint32_t flags,
|
||||
int *prime_fd);
|
||||
|
||||
/* helper functions for exporting */
|
||||
int drm_gem_map_attach(struct dma_buf *dma_buf,
|
||||
struct dma_buf_attachment *attach);
|
||||
void drm_gem_map_detach(struct dma_buf *dma_buf,
|
||||
|
|
@ -94,12 +86,26 @@ void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
|
|||
enum dma_data_direction dir);
|
||||
void *drm_gem_dmabuf_vmap(struct dma_buf *dma_buf);
|
||||
void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr);
|
||||
|
||||
int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
|
||||
int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma);
|
||||
|
||||
struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages);
|
||||
struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
|
||||
struct drm_gem_object *obj,
|
||||
int flags);
|
||||
|
||||
/* helper functions for importing */
|
||||
struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev,
|
||||
struct dma_buf *dma_buf,
|
||||
struct device *attach_dev);
|
||||
struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
|
||||
struct dma_buf *dma_buf);
|
||||
|
||||
void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
|
||||
|
||||
int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
|
||||
dma_addr_t *addrs, int max_pages);
|
||||
struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages);
|
||||
void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
|
||||
|
||||
|
||||
#endif /* __DRM_PRIME_H__ */
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче