cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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msm_gem_prime.c (1678B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Copyright (C) 2013 Red Hat
      4 * Author: Rob Clark <robdclark@gmail.com>
      5 */
      6
      7#include <linux/dma-buf.h>
      8
      9#include <drm/drm_prime.h>
     10
     11#include "msm_drv.h"
     12#include "msm_gem.h"
     13
     14int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
     15{
     16	int ret;
     17
     18	/* Ensure the mmap offset is initialized.  We lazily initialize it,
     19	 * so if it has not been first mmap'd directly as a GEM object, the
     20	 * mmap offset will not be already initialized.
     21	 */
     22	ret = drm_gem_create_mmap_offset(obj);
     23	if (ret)
     24		return ret;
     25
     26	return drm_gem_prime_mmap(obj, vma);
     27}
     28
     29struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
     30{
     31	struct msm_gem_object *msm_obj = to_msm_bo(obj);
     32	int npages = obj->size >> PAGE_SHIFT;
     33
     34	if (WARN_ON(!msm_obj->pages))  /* should have already pinned! */
     35		return ERR_PTR(-ENOMEM);
     36
     37	return drm_prime_pages_to_sg(obj->dev, msm_obj->pages, npages);
     38}
     39
     40int msm_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
     41{
     42	void *vaddr;
     43
     44	vaddr = msm_gem_get_vaddr(obj);
     45	if (IS_ERR(vaddr))
     46		return PTR_ERR(vaddr);
     47	iosys_map_set_vaddr(map, vaddr);
     48
     49	return 0;
     50}
     51
     52void msm_gem_prime_vunmap(struct drm_gem_object *obj, struct iosys_map *map)
     53{
     54	msm_gem_put_vaddr(obj);
     55}
     56
     57struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
     58		struct dma_buf_attachment *attach, struct sg_table *sg)
     59{
     60	return msm_gem_import(dev, attach->dmabuf, sg);
     61}
     62
     63int msm_gem_prime_pin(struct drm_gem_object *obj)
     64{
     65	if (!obj->import_attach)
     66		msm_gem_get_pages(obj);
     67	return 0;
     68}
     69
     70void msm_gem_prime_unpin(struct drm_gem_object *obj)
     71{
     72	if (!obj->import_attach)
     73		msm_gem_put_pages(obj);
     74}