drivers/gpu/drm/msm/msm_gem_prime.c

   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
  23 struct 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         BUG_ON(!msm_obj->sgt);  /* should have already pinned! */
  27         return msm_obj->sgt;
  28 }
  29
  30 void *msm_gem_prime_vmap(struct drm_gem_object *obj)
  31 {
  32         return msm_gem_vaddr(obj);
  33 }
  34
  35 void msm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
  36 {
  37         /* TODO msm_gem_vunmap() */
  38 }
  39
  40 int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
  41 {
  42         int ret;
  43
  44         mutex_lock(&obj->dev->struct_mutex);
  45         ret = drm_gem_mmap_obj(obj, obj->size, vma);
  46         mutex_unlock(&obj->dev->struct_mutex);
  47         if (ret < 0)
  48                 return ret;
  49
  50         return msm_gem_mmap_obj(vma->vm_private_data, vma);
  51 }
  52
  53 struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
  54                 struct dma_buf_attachment *attach, struct sg_table *sg)
  55 {
  56         return msm_gem_import(dev, attach->dmabuf->size, sg);
  57 }
  58
  59 int msm_gem_prime_pin(struct drm_gem_object *obj)
  60 {
  61         if (!obj->import_attach)
  62                 msm_gem_get_pages(obj);
  63         return 0;
  64 }
  65
  66 void msm_gem_prime_unpin(struct drm_gem_object *obj)
  67 {
  68         if (!obj->import_attach)
  69                 msm_gem_put_pages(obj);
  70 }