linux/drivers/gpu/drm/msm/msm_gem_prime.c
Thomas Zimmermann 510410bfc0 drm/msm: Implement mmap as GEM object function
Moving the driver-specific mmap code into a GEM object function allows
for using DRM helpers for various mmap callbacks.

The respective msm functions are being removed. The file_operations
structure fops is now being created by the helper macro
DEFINE_DRM_GEM_FOPS().

v2:
	* rebase onto latest upstream
	* remove declaration of msm_gem_mmap_obj() from msm_fbdev.c

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/r/20210706084753.8194-1-tzimmermann@suse.de
[squash in missing VM_DONTEXPAND flag]
Signed-off-by: Rob Clark <robdclark@chromium.org>
2021-08-07 11:48:37 -07:00

60 lines
1.3 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2013 Red Hat
* Author: Rob Clark <robdclark@gmail.com>
*/
#include <linux/dma-buf.h>
#include <drm/drm_prime.h>
#include "msm_drv.h"
#include "msm_gem.h"
struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
{
struct msm_gem_object *msm_obj = to_msm_bo(obj);
int npages = obj->size >> PAGE_SHIFT;
if (WARN_ON(!msm_obj->pages)) /* should have already pinned! */
return NULL;
return drm_prime_pages_to_sg(obj->dev, msm_obj->pages, npages);
}
int msm_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
{
void *vaddr;
vaddr = msm_gem_get_vaddr(obj);
if (IS_ERR(vaddr))
return PTR_ERR(vaddr);
dma_buf_map_set_vaddr(map, vaddr);
return 0;
}
void msm_gem_prime_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map)
{
msm_gem_put_vaddr(obj);
}
struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
struct dma_buf_attachment *attach, struct sg_table *sg)
{
return msm_gem_import(dev, attach->dmabuf, sg);
}
int msm_gem_prime_pin(struct drm_gem_object *obj)
{
if (!obj->import_attach)
msm_gem_get_pages(obj);
return 0;
}
void msm_gem_prime_unpin(struct drm_gem_object *obj)
{
if (!obj->import_attach)
msm_gem_put_pages(obj);
}