linux/drivers/media/common/videobuf2/videobuf2-vmalloc.c

/*
 * videobuf2-vmalloc.c - vmalloc memory allocator for videobuf2
 *
 * Copyright (C) 2010 Samsung Electronics
 *
 * Author: Pawel Osciak <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation.
 */

#include <linux/io.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/refcount.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>

#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-vmalloc.h>
#include <media/videobuf2-memops.h>

struct vb2_vmalloc_buf { … };

static void vb2_vmalloc_put(void *buf_priv);

static void *vb2_vmalloc_alloc(struct vb2_buffer *vb, struct device *dev,
			       unsigned long size)
{ … }

static void vb2_vmalloc_put(void *buf_priv)
{ … }

static void *vb2_vmalloc_get_userptr(struct vb2_buffer *vb, struct device *dev,
				     unsigned long vaddr, unsigned long size)
{ … }

static void vb2_vmalloc_put_userptr(void *buf_priv)
{ … }

static void *vb2_vmalloc_vaddr(struct vb2_buffer *vb, void *buf_priv)
{ … }

static unsigned int vb2_vmalloc_num_users(void *buf_priv)
{ … }

static int vb2_vmalloc_mmap(void *buf_priv, struct vm_area_struct *vma)
{ … }

#ifdef CONFIG_HAS_DMA
/*********************************************/
/*         DMABUF ops for exporters          */
/*********************************************/

struct vb2_vmalloc_attachment { … };

static int vb2_vmalloc_dmabuf_ops_attach(struct dma_buf *dbuf,
	struct dma_buf_attachment *dbuf_attach)
{ … }

static void vb2_vmalloc_dmabuf_ops_detach(struct dma_buf *dbuf,
	struct dma_buf_attachment *db_attach)
{ … }

static struct sg_table *vb2_vmalloc_dmabuf_ops_map(
	struct dma_buf_attachment *db_attach, enum dma_data_direction dma_dir)
{ … }

static void vb2_vmalloc_dmabuf_ops_unmap(struct dma_buf_attachment *db_attach,
	struct sg_table *sgt, enum dma_data_direction dma_dir)
{ … }

static void vb2_vmalloc_dmabuf_ops_release(struct dma_buf *dbuf)
{ … }

static int vb2_vmalloc_dmabuf_ops_vmap(struct dma_buf *dbuf,
				       struct iosys_map *map)
{ … }

static int vb2_vmalloc_dmabuf_ops_mmap(struct dma_buf *dbuf,
	struct vm_area_struct *vma)
{ … }

static const struct dma_buf_ops vb2_vmalloc_dmabuf_ops = …;

static struct dma_buf *vb2_vmalloc_get_dmabuf(struct vb2_buffer *vb,
					      void *buf_priv,
					      unsigned long flags)
{ … }
#endif /* CONFIG_HAS_DMA */


/*********************************************/
/*       callbacks for DMABUF buffers        */
/*********************************************/

static int vb2_vmalloc_map_dmabuf(void *mem_priv)
{ … }

static void vb2_vmalloc_unmap_dmabuf(void *mem_priv)
{ … }

static void vb2_vmalloc_detach_dmabuf(void *mem_priv)
{ … }

static void *vb2_vmalloc_attach_dmabuf(struct vb2_buffer *vb,
				       struct device *dev,
				       struct dma_buf *dbuf,
				       unsigned long size)
{ … }


const struct vb2_mem_ops vb2_vmalloc_memops = …;
EXPORT_SYMBOL_GPL(…);

MODULE_DESCRIPTION(…) …;
MODULE_AUTHOR(…) …;
MODULE_LICENSE(…) …;
MODULE_IMPORT_NS(…);