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Commit 5c692948 authored by Maarten Lankhorst's avatar Maarten Lankhorst Committed by Dave Airlie
Browse files

drm/ttm: kill unused functions 



Signed-off-by: default avatarMaarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: default avatarThomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent e552df37

drivers/gpu/drm/ttm/ttm_bo_vm.c

+0 −154
Original line number Diff line number Diff line
@@ -290,157 +290,3 @@ int ttm_fbdev_mmap(struct vm_area_struct *vma, struct ttm_buffer_object *bo) 
	return 0;

}

EXPORT_SYMBOL(ttm_fbdev_mmap);
 




ssize_t ttm_bo_io(struct ttm_bo_device *bdev, struct file *filp,

		  const char __user *wbuf, char __user *rbuf, size_t count,

		  loff_t *f_pos, bool write)

{

	struct ttm_buffer_object *bo;

	struct ttm_bo_driver *driver;

	struct ttm_bo_kmap_obj map;

	unsigned long dev_offset = (*f_pos >> PAGE_SHIFT);

	unsigned long kmap_offset;

	unsigned long kmap_end;

	unsigned long kmap_num;

	size_t io_size;

	unsigned int page_offset;

	char *virtual;

	int ret;

	bool no_wait = false;

	bool dummy;



	bo = ttm_bo_vm_lookup(bdev, dev_offset, 1);

	if (unlikely(bo == NULL))

		return -EFAULT;



	driver = bo->bdev->driver;

	if (unlikely(!driver->verify_access)) {

		ret = -EPERM;

		goto out_unref;

	}



	ret = driver->verify_access(bo, filp);

	if (unlikely(ret != 0))

		goto out_unref;



	kmap_offset = dev_offset - drm_vma_node_start(&bo->vma_node);

	if (unlikely(kmap_offset >= bo->num_pages)) {

		ret = -EFBIG;

		goto out_unref;

	}



	page_offset = *f_pos & ~PAGE_MASK;

	io_size = bo->num_pages - kmap_offset;

	io_size = (io_size << PAGE_SHIFT) - page_offset;

	if (count < io_size)

		io_size = count;



	kmap_end = (*f_pos + count - 1) >> PAGE_SHIFT;

	kmap_num = kmap_end - kmap_offset + 1;



	ret = ttm_bo_reserve(bo, true, no_wait, false, 0);



	switch (ret) {

	case 0:

		break;

	case -EBUSY:

		ret = -EAGAIN;

		goto out_unref;

	default:

		goto out_unref;

	}



	ret = ttm_bo_kmap(bo, kmap_offset, kmap_num, &map);

	if (unlikely(ret != 0)) {

		ttm_bo_unreserve(bo);

		goto out_unref;

	}



	virtual = ttm_kmap_obj_virtual(&map, &dummy);

	virtual += page_offset;



	if (write)

		ret = copy_from_user(virtual, wbuf, io_size);

	else

		ret = copy_to_user(rbuf, virtual, io_size);



	ttm_bo_kunmap(&map);

	ttm_bo_unreserve(bo);

	ttm_bo_unref(&bo);



	if (unlikely(ret != 0))

		return -EFBIG;



	*f_pos += io_size;



	return io_size;

out_unref:

	ttm_bo_unref(&bo);

	return ret;

}



ssize_t ttm_bo_fbdev_io(struct ttm_buffer_object *bo, const char __user *wbuf,

			char __user *rbuf, size_t count, loff_t *f_pos,

			bool write)

{

	struct ttm_bo_kmap_obj map;

	unsigned long kmap_offset;

	unsigned long kmap_end;

	unsigned long kmap_num;

	size_t io_size;

	unsigned int page_offset;

	char *virtual;

	int ret;

	bool no_wait = false;

	bool dummy;



	kmap_offset = (*f_pos >> PAGE_SHIFT);

	if (unlikely(kmap_offset >= bo->num_pages))

		return -EFBIG;



	page_offset = *f_pos & ~PAGE_MASK;

	io_size = bo->num_pages - kmap_offset;

	io_size = (io_size << PAGE_SHIFT) - page_offset;

	if (count < io_size)

		io_size = count;



	kmap_end = (*f_pos + count - 1) >> PAGE_SHIFT;

	kmap_num = kmap_end - kmap_offset + 1;



	ret = ttm_bo_reserve(bo, true, no_wait, false, 0);



	switch (ret) {

	case 0:

		break;

	case -EBUSY:

		return -EAGAIN;

	default:

		return ret;

	}



	ret = ttm_bo_kmap(bo, kmap_offset, kmap_num, &map);

	if (unlikely(ret != 0)) {

		ttm_bo_unreserve(bo);

		return ret;

	}



	virtual = ttm_kmap_obj_virtual(&map, &dummy);

	virtual += page_offset;



	if (write)

		ret = copy_from_user(virtual, wbuf, io_size);

	else

		ret = copy_to_user(rbuf, virtual, io_size);



	ttm_bo_kunmap(&map);

	ttm_bo_unreserve(bo);

	ttm_bo_unref(&bo);



	if (unlikely(ret != 0))

		return ret;



	*f_pos += io_size;



	return io_size;

}