LXR linux/drivers/gpu/drm/msm/msm_gem

   1/*
   2 * Copyright (C) 2013 Red Hat
   3 * Author: Rob Clark <robdclark@gmail.com>
   4 *
   5 * This program is free software; you can redistribute it and/or modify it
   6 * under the terms of the GNU General Public License version 2 as published by
   7 * the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it will be useful, but WITHOUT
  10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12 * more details.
  13 *
  14 * You should have received a copy of the GNU General Public License along with
  15 * this program.  If not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18#include "msm_drv.h"
  19#include "msm_gem.h"
  20
  21#include <linux/dma-buf.h>
  22
  23struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
  24{
  25        struct msm_gem_object *msm_obj = to_msm_bo(obj);
  26        int npages = obj->size >> PAGE_SHIFT;
  27
  28        if (WARN_ON(!msm_obj->pages))  /* should have already pinned! */
  29                return NULL;
  30
  31        return drm_prime_pages_to_sg(msm_obj->pages, npages);
  32}
  33
  34void *msm_gem_prime_vmap(struct drm_gem_object *obj)
  35{
  36        return msm_gem_get_vaddr(obj);
  37}
  38
  39void msm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
  40{
  41        msm_gem_put_vaddr(obj);
  42}
  43
  44int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
  45{
  46        int ret;
  47
  48        ret = drm_gem_mmap_obj(obj, obj->size, vma);
  49        if (ret < 0)
  50                return ret;
  51
  52        return msm_gem_mmap_obj(vma->vm_private_data, vma);
  53}
  54
  55struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
  56                struct dma_buf_attachment *attach, struct sg_table *sg)
  57{
  58        return msm_gem_import(dev, attach->dmabuf, sg);
  59}
  60
  61int msm_gem_prime_pin(struct drm_gem_object *obj)
  62{
  63        if (!obj->import_attach)
  64                msm_gem_get_pages(obj);
  65        return 0;
  66}
  67
  68void msm_gem_prime_unpin(struct drm_gem_object *obj)
  69{
  70        if (!obj->import_attach)
  71                msm_gem_put_pages(obj);
  72}
  73
  74struct reservation_object *msm_gem_prime_res_obj(struct drm_gem_object *obj)
  75{
  76        struct msm_gem_object *msm_obj = to_msm_bo(obj);
  77
  78        return msm_obj->resv;
  79}
  80