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         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
  34 void *msm_gem_prime_vmap(struct drm_gem_object *obj)
  35 {
  36         return msm_gem_vaddr(obj);
  37 }
  38
  39 void msm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
  40 {
  41         /* TODO msm_gem_vunmap() */
  42 }
  43
  44 int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
  45 {
  46         int ret;
  47
  48         mutex_lock(&obj->dev->struct_mutex);
  49         ret = drm_gem_mmap_obj(obj, obj->size, vma);
  50         mutex_unlock(&obj->dev->struct_mutex);
  51         if (ret < 0)
  52                 return ret;
  53
  54         return msm_gem_mmap_obj(vma->vm_private_data, vma);
  55 }
  56
  57 struct 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->size, sg);
  61 }
  62
  63 int 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
  70 void msm_gem_prime_unpin(struct drm_gem_object *obj)
  71 {
  72         if (!obj->import_attach)
  73                 msm_gem_put_pages(obj);
  74 }