Ejemplos de dma_unmap_sg_attrs en C++ (Cpp)

Ejemplo n.º 1

Archivo: videobuf2-dma-sg.c Proyecto: EvolutionMod/ath10-lenovo

static void vb2_dma_sg_put(void *buf_priv)
{
	struct vb2_dma_sg_buf *buf = buf_priv;
	struct sg_table *sgt = &buf->sg_table;
	int i = buf->num_pages;

	if (atomic_dec_and_test(&buf->refcount)) {
		DEFINE_DMA_ATTRS(attrs);

#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0)
		dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs);
#endif
		dprintk(1, "%s: Freeing buffer of %d pages\n", __func__,
			buf->num_pages);
		dma_unmap_sg_attrs(buf->dev, sgt->sgl, sgt->orig_nents,
				   buf->dma_dir, &attrs);
		if (buf->vaddr)
			vm_unmap_ram(buf->vaddr, buf->num_pages);
		sg_free_table(buf->dma_sgt);
		while (--i >= 0)
			__free_page(buf->pages[i]);
		kfree(buf->pages);
		put_device(buf->dev);
		kfree(buf);
	}
}

Ejemplo n.º 2

Archivo: videobuf2-dma-sg.c Proyecto: EvolutionMod/ath10-lenovo

/*
 * @put_userptr: inform the allocator that a USERPTR buffer will no longer
 *		 be used
 */
static void vb2_dma_sg_put_userptr(void *buf_priv)
{
	struct vb2_dma_sg_buf *buf = buf_priv;
	struct sg_table *sgt = &buf->sg_table;
	int i = buf->num_pages;
	DEFINE_DMA_ATTRS(attrs);

#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0)
	dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs);
#endif

	dprintk(1, "%s: Releasing userspace buffer of %d pages\n",
	       __func__, buf->num_pages);
	dma_unmap_sg_attrs(buf->dev, sgt->sgl, sgt->orig_nents, buf->dma_dir,
			   &attrs);
	if (buf->vaddr)
		vm_unmap_ram(buf->vaddr, buf->num_pages);
	sg_free_table(buf->dma_sgt);
	while (--i >= 0) {
		if (buf->dma_dir == DMA_FROM_DEVICE)
			set_page_dirty_lock(buf->pages[i]);
		if (!vma_is_io(buf->vma))
			put_page(buf->pages[i]);
	}
	kfree(buf->pages);
	vb2_put_vma(buf->vma);
	kfree(buf);
}

Ejemplo n.º 3

Archivo: videobuf2-dma-sg.c Proyecto: ChineseDr/linux

/*
 * @put_userptr: inform the allocator that a USERPTR buffer will no longer
 *		 be used
 */
static void vb2_dma_sg_put_userptr(void *buf_priv)
{
	struct vb2_dma_sg_buf *buf = buf_priv;
	struct sg_table *sgt = &buf->sg_table;
	int i = buf->num_pages;
	DEFINE_DMA_ATTRS(attrs);

	dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs);

	dprintk(1, "%s: Releasing userspace buffer of %d pages\n",
	       __func__, buf->num_pages);
	dma_unmap_sg_attrs(buf->dev, sgt->sgl, sgt->orig_nents, buf->dma_dir,
			   &attrs);
	if (buf->vaddr)
		vm_unmap_ram(buf->vaddr, buf->num_pages);
	sg_free_table(buf->dma_sgt);
	while (--i >= 0) {
		if (buf->dma_dir == DMA_FROM_DEVICE)
			set_page_dirty_lock(buf->pages[i]);
	}
	vb2_destroy_framevec(buf->vec);
	kfree(buf);
}