1 files changed, 0 insertions, 452 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-vmalloc.c b/drivers/media/v4l2-core/videobuf2-vmalloc.c
deleted file mode 100644
index 3a7c80cd1a17..000000000000
--- a/drivers/media/v4l2-core/videobuf2-vmalloc.c
+++ /dev/null
@@ -1,452 +0,0 @@
-/*
- * videobuf2-vmalloc.c - vmalloc memory allocator for videobuf2
- *
- * Copyright (C) 2010 Samsung Electronics
- *
- * Author: Pawel Osciak <pawel@osciak.com>
- *
- * 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 {
-	void				*vaddr;
-	struct frame_vector		*vec;
-	enum dma_data_direction		dma_dir;
-	unsigned long			size;
-	refcount_t			refcount;
-	struct vb2_vmarea_handler	handler;
-	struct dma_buf			*dbuf;
-};
-
-static void vb2_vmalloc_put(void *buf_priv);
-
-static void *vb2_vmalloc_alloc(struct device *dev, unsigned long attrs,
-			       unsigned long size, enum dma_data_direction dma_dir,
-			       gfp_t gfp_flags)
-{
-	struct vb2_vmalloc_buf *buf;
-
-	buf = kzalloc(sizeof(*buf), GFP_KERNEL | gfp_flags);
-	if (!buf)
-		return ERR_PTR(-ENOMEM);
-
-	buf->size = size;
-	buf->vaddr = vmalloc_user(buf->size);
-	buf->dma_dir = dma_dir;
-	buf->handler.refcount = &buf->refcount;
-	buf->handler.put = vb2_vmalloc_put;
-	buf->handler.arg = buf;
-
-	if (!buf->vaddr) {
-		pr_debug("vmalloc of size %ld failed\n", buf->size);
-		kfree(buf);
-		return ERR_PTR(-ENOMEM);
-	}
-
-	refcount_set(&buf->refcount, 1);
-	return buf;
-}
-
-static void vb2_vmalloc_put(void *buf_priv)
-{
-	struct vb2_vmalloc_buf *buf = buf_priv;
-
-	if (refcount_dec_and_test(&buf->refcount)) {
-		vfree(buf->vaddr);
-		kfree(buf);
-	}
-}
-
-static void *vb2_vmalloc_get_userptr(struct device *dev, unsigned long vaddr,
-				     unsigned long size,
-				     enum dma_data_direction dma_dir)
-{
-	struct vb2_vmalloc_buf *buf;
-	struct frame_vector *vec;
-	int n_pages, offset, i;
-	int ret = -ENOMEM;
-
-	buf = kzalloc(sizeof(*buf), GFP_KERNEL);
-	if (!buf)
-		return ERR_PTR(-ENOMEM);
-
-	buf->dma_dir = dma_dir;
-	offset = vaddr & ~PAGE_MASK;
-	buf->size = size;
-	vec = vb2_create_framevec(vaddr, size, dma_dir == DMA_FROM_DEVICE ||
-					       dma_dir == DMA_BIDIRECTIONAL);
-	if (IS_ERR(vec)) {
-		ret = PTR_ERR(vec);
-		goto fail_pfnvec_create;
-	}
-	buf->vec = vec;
-	n_pages = frame_vector_count(vec);
-	if (frame_vector_to_pages(vec) < 0) {
-		unsigned long *nums = frame_vector_pfns(vec);
-
-		/*
-		 * We cannot get page pointers for these pfns. Check memory is
-		 * physically contiguous and use direct mapping.
-		 */
-		for (i = 1; i < n_pages; i++)
-			if (nums[i-1] + 1 != nums[i])
-				goto fail_map;
-		buf->vaddr = (__force void *)
-				ioremap_nocache(nums[0] << PAGE_SHIFT, size);
-	} else {
-		buf->vaddr = vm_map_ram(frame_vector_pages(vec), n_pages, -1,
-					PAGE_KERNEL);
-	}
-
-	if (!buf->vaddr)
-		goto fail_map;
-	buf->vaddr += offset;
-	return buf;
-
-fail_map:
-	vb2_destroy_framevec(vec);
-fail_pfnvec_create:
-	kfree(buf);
-
-	return ERR_PTR(ret);
-}
-
-static void vb2_vmalloc_put_userptr(void *buf_priv)
-{
-	struct vb2_vmalloc_buf *buf = buf_priv;
-	unsigned long vaddr = (unsigned long)buf->vaddr & PAGE_MASK;
-	unsigned int i;
-	struct page **pages;
-	unsigned int n_pages;
-
-	if (!buf->vec->is_pfns) {
-		n_pages = frame_vector_count(buf->vec);
-		pages = frame_vector_pages(buf->vec);
-		if (vaddr)
-			vm_unmap_ram((void *)vaddr, n_pages);
-		if (buf->dma_dir == DMA_FROM_DEVICE ||
-		    buf->dma_dir == DMA_BIDIRECTIONAL)
-			for (i = 0; i < n_pages; i++)
-				set_page_dirty_lock(pages[i]);
-	} else {
-		iounmap((__force void __iomem *)buf->vaddr);
-	}
-	vb2_destroy_framevec(buf->vec);
-	kfree(buf);
-}
-
-static void *vb2_vmalloc_vaddr(void *buf_priv)
-{
-	struct vb2_vmalloc_buf *buf = buf_priv;
-
-	if (!buf->vaddr) {
-		pr_err("Address of an unallocated plane requested or cannot map user pointer\n");
-		return NULL;
-	}
-
-	return buf->vaddr;
-}
-
-static unsigned int vb2_vmalloc_num_users(void *buf_priv)
-{
-	struct vb2_vmalloc_buf *buf = buf_priv;
-	return refcount_read(&buf->refcount);
-}
-
-static int vb2_vmalloc_mmap(void *buf_priv, struct vm_area_struct *vma)
-{
-	struct vb2_vmalloc_buf *buf = buf_priv;
-	int ret;
-
-	if (!buf) {
-		pr_err("No memory to map\n");
-		return -EINVAL;
-	}
-
-	ret = remap_vmalloc_range(vma, buf->vaddr, 0);
-	if (ret) {
-		pr_err("Remapping vmalloc memory, error: %d\n", ret);
-		return ret;
-	}
-
-	/*
-	 * Make sure that vm_areas for 2 buffers won't be merged together
-	 */
-	vma->vm_flags		|= VM_DONTEXPAND;
-
-	/*
-	 * Use common vm_area operations to track buffer refcount.
-	 */
-	vma->vm_private_data	= &buf->handler;
-	vma->vm_ops		= &vb2_common_vm_ops;
-
-	vma->vm_ops->open(vma);
-
-	return 0;
-}
-
-#ifdef CONFIG_HAS_DMA
-/*********************************************/
-/*         DMABUF ops for exporters          */
-/*********************************************/
-
-struct vb2_vmalloc_attachment {
-	struct sg_table sgt;
-	enum dma_data_direction dma_dir;
-};
-
-static int vb2_vmalloc_dmabuf_ops_attach(struct dma_buf *dbuf, struct device *dev,
-	struct dma_buf_attachment *dbuf_attach)
-{
-	struct vb2_vmalloc_attachment *attach;
-	struct vb2_vmalloc_buf *buf = dbuf->priv;
-	int num_pages = PAGE_ALIGN(buf->size) / PAGE_SIZE;
-	struct sg_table *sgt;
-	struct scatterlist *sg;
-	void *vaddr = buf->vaddr;
-	int ret;
-	int i;
-
-	attach = kzalloc(sizeof(*attach), GFP_KERNEL);
-	if (!attach)
-		return -ENOMEM;
-
-	sgt = &attach->sgt;
-	ret = sg_alloc_table(sgt, num_pages, GFP_KERNEL);
-	if (ret) {
-		kfree(attach);
-		return ret;
-	}
-	for_each_sg(sgt->sgl, sg, sgt->nents, i) {
-		struct page *page = vmalloc_to_page(vaddr);
-
-		if (!page) {
-			sg_free_table(sgt);
-			kfree(attach);
-			return -ENOMEM;
-		}
-		sg_set_page(sg, page, PAGE_SIZE, 0);
-		vaddr += PAGE_SIZE;
-	}
-
-	attach->dma_dir = DMA_NONE;
-	dbuf_attach->priv = attach;
-	return 0;
-}
-
-static void vb2_vmalloc_dmabuf_ops_detach(struct dma_buf *dbuf,
-	struct dma_buf_attachment *db_attach)
-{
-	struct vb2_vmalloc_attachment *attach = db_attach->priv;
-	struct sg_table *sgt;
-
-	if (!attach)
-		return;
-
-	sgt = &attach->sgt;
-
-	/* release the scatterlist cache */
-	if (attach->dma_dir != DMA_NONE)
-		dma_unmap_sg(db_attach->dev, sgt->sgl, sgt->orig_nents,
-			attach->dma_dir);
-	sg_free_table(sgt);
-	kfree(attach);
-	db_attach->priv = NULL;
-}
-
-static struct sg_table *vb2_vmalloc_dmabuf_ops_map(
-	struct dma_buf_attachment *db_attach, enum dma_data_direction dma_dir)
-{
-	struct vb2_vmalloc_attachment *attach = db_attach->priv;
-	/* stealing dmabuf mutex to serialize map/unmap operations */
-	struct mutex *lock = &db_attach->dmabuf->lock;
-	struct sg_table *sgt;
-
-	mutex_lock(lock);
-
-	sgt = &attach->sgt;
-	/* return previously mapped sg table */
-	if (attach->dma_dir == dma_dir) {
-		mutex_unlock(lock);
-		return sgt;
-	}
-
-	/* release any previous cache */
-	if (attach->dma_dir != DMA_NONE) {
-		dma_unmap_sg(db_attach->dev, sgt->sgl, sgt->orig_nents,
-			attach->dma_dir);
-		attach->dma_dir = DMA_NONE;
-	}
-
-	/* mapping to the client with new direction */
-	sgt->nents = dma_map_sg(db_attach->dev, sgt->sgl, sgt->orig_nents,
-				dma_dir);
-	if (!sgt->nents) {
-		pr_err("failed to map scatterlist\n");
-		mutex_unlock(lock);
-		return ERR_PTR(-EIO);
-	}
-
-	attach->dma_dir = dma_dir;
-
-	mutex_unlock(lock);
-
-	return sgt;
-}
-
-static void vb2_vmalloc_dmabuf_ops_unmap(struct dma_buf_attachment *db_attach,
-	struct sg_table *sgt, enum dma_data_direction dma_dir)
-{
-	/* nothing to be done here */
-}
-
-static void vb2_vmalloc_dmabuf_ops_release(struct dma_buf *dbuf)
-{
-	/* drop reference obtained in vb2_vmalloc_get_dmabuf */
-	vb2_vmalloc_put(dbuf->priv);
-}
-
-static void *vb2_vmalloc_dmabuf_ops_kmap(struct dma_buf *dbuf, unsigned long pgnum)
-{
-	struct vb2_vmalloc_buf *buf = dbuf->priv;
-
-	return buf->vaddr + pgnum * PAGE_SIZE;
-}
-
-static void *vb2_vmalloc_dmabuf_ops_vmap(struct dma_buf *dbuf)
-{
-	struct vb2_vmalloc_buf *buf = dbuf->priv;
-
-	return buf->vaddr;
-}
-
-static int vb2_vmalloc_dmabuf_ops_mmap(struct dma_buf *dbuf,
-	struct vm_area_struct *vma)
-{
-	return vb2_vmalloc_mmap(dbuf->priv, vma);
-}
-
-static const struct dma_buf_ops vb2_vmalloc_dmabuf_ops = {
-	.attach = vb2_vmalloc_dmabuf_ops_attach,
-	.detach = vb2_vmalloc_dmabuf_ops_detach,
-	.map_dma_buf = vb2_vmalloc_dmabuf_ops_map,
-	.unmap_dma_buf = vb2_vmalloc_dmabuf_ops_unmap,
-	.map = vb2_vmalloc_dmabuf_ops_kmap,
-	.map_atomic = vb2_vmalloc_dmabuf_ops_kmap,
-	.vmap = vb2_vmalloc_dmabuf_ops_vmap,
-	.mmap = vb2_vmalloc_dmabuf_ops_mmap,
-	.release = vb2_vmalloc_dmabuf_ops_release,
-};
-
-static struct dma_buf *vb2_vmalloc_get_dmabuf(void *buf_priv, unsigned long flags)
-{
-	struct vb2_vmalloc_buf *buf = buf_priv;
-	struct dma_buf *dbuf;
-	DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
-
-	exp_info.ops = &vb2_vmalloc_dmabuf_ops;
-	exp_info.size = buf->size;
-	exp_info.flags = flags;
-	exp_info.priv = buf;
-
-	if (WARN_ON(!buf->vaddr))
-		return NULL;
-
-	dbuf = dma_buf_export(&exp_info);
-	if (IS_ERR(dbuf))
-		return NULL;
-
-	/* dmabuf keeps reference to vb2 buffer */
-	refcount_inc(&buf->refcount);
-
-	return dbuf;
-}
-#endif /* CONFIG_HAS_DMA */
-
-
-/*********************************************/
-/*       callbacks for DMABUF buffers        */
-/*********************************************/
-
-static int vb2_vmalloc_map_dmabuf(void *mem_priv)
-{
-	struct vb2_vmalloc_buf *buf = mem_priv;
-
-	buf->vaddr = dma_buf_vmap(buf->dbuf);
-
-	return buf->vaddr ? 0 : -EFAULT;
-}
-
-static void vb2_vmalloc_unmap_dmabuf(void *mem_priv)
-{
-	struct vb2_vmalloc_buf *buf = mem_priv;
-
-	dma_buf_vunmap(buf->dbuf, buf->vaddr);
-	buf->vaddr = NULL;
-}
-
-static void vb2_vmalloc_detach_dmabuf(void *mem_priv)
-{
-	struct vb2_vmalloc_buf *buf = mem_priv;
-
-	if (buf->vaddr)
-		dma_buf_vunmap(buf->dbuf, buf->vaddr);
-
-	kfree(buf);
-}
-
-static void *vb2_vmalloc_attach_dmabuf(struct device *dev, struct dma_buf *dbuf,
-	unsigned long size, enum dma_data_direction dma_dir)
-{
-	struct vb2_vmalloc_buf *buf;
-
-	if (dbuf->size < size)
-		return ERR_PTR(-EFAULT);
-
-	buf = kzalloc(sizeof(*buf), GFP_KERNEL);
-	if (!buf)
-		return ERR_PTR(-ENOMEM);
-
-	buf->dbuf = dbuf;
-	buf->dma_dir = dma_dir;
-	buf->size = size;
-
-	return buf;
-}
-
-
-const struct vb2_mem_ops vb2_vmalloc_memops = {
-	.alloc		= vb2_vmalloc_alloc,
-	.put		= vb2_vmalloc_put,
-	.get_userptr	= vb2_vmalloc_get_userptr,
-	.put_userptr	= vb2_vmalloc_put_userptr,
-#ifdef CONFIG_HAS_DMA
-	.get_dmabuf	= vb2_vmalloc_get_dmabuf,
-#endif
-	.map_dmabuf	= vb2_vmalloc_map_dmabuf,
-	.unmap_dmabuf	= vb2_vmalloc_unmap_dmabuf,
-	.attach_dmabuf	= vb2_vmalloc_attach_dmabuf,
-	.detach_dmabuf	= vb2_vmalloc_detach_dmabuf,
-	.vaddr		= vb2_vmalloc_vaddr,
-	.mmap		= vb2_vmalloc_mmap,
-	.num_users	= vb2_vmalloc_num_users,
-};
-EXPORT_SYMBOL_GPL(vb2_vmalloc_memops);
-
-MODULE_DESCRIPTION("vmalloc memory handling routines for videobuf2");
-MODULE_AUTHOR("Pawel Osciak <pawel@osciak.com>");
-MODULE_LICENSE("GPL");