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_get_vaddr(obj);
  37 }
  38
  39 void msm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
  40 {
  41         msm_gem_put_vaddr(obj);
  42 }
  43
  44 int 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
  55 struct 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
  61 int 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
  68 void msm_gem_prime_unpin(struct drm_gem_object *obj)
  69 {
  70         if (!obj->import_attach)
  71                 msm_gem_put_pages(obj);
  72 }
  73
  74 struct 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 }