drivers/gpu/drm/msm/msm_gem_prime.c

   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
  14 struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
  15 {
  16         struct msm_gem_object *msm_obj = to_msm_bo(obj);
  17         int npages = obj->size >> PAGE_SHIFT;
  18
  19         if (WARN_ON(!msm_obj->pages))  /* should have already pinned! */
  20                 return ERR_PTR(-ENOMEM);
  21
  22         return drm_prime_pages_to_sg(obj->dev, msm_obj->pages, npages);
  23 }
  24
  25 int msm_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
  26 {
  27         void *vaddr;
  28
  29         vaddr = msm_gem_get_vaddr_locked(obj);
  30         if (IS_ERR(vaddr))
  31                 return PTR_ERR(vaddr);
  32         iosys_map_set_vaddr(map, vaddr);
  33
  34         return 0;
  35 }
  36
  37 void msm_gem_prime_vunmap(struct drm_gem_object *obj, struct iosys_map *map)
  38 {
  39         msm_gem_put_vaddr_locked(obj);
  40 }
  41
  42 struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
  43                 struct dma_buf_attachment *attach, struct sg_table *sg)
  44 {
  45         return msm_gem_import(dev, attach->dmabuf, sg);
  46 }
  47
  48 int msm_gem_prime_pin(struct drm_gem_object *obj)
  49 {
  50         struct page **pages;
  51         int ret = 0;
  52
  53         if (obj->import_attach)
  54                 return 0;
  55
  56         pages = msm_gem_pin_pages_locked(obj);
  57         if (IS_ERR(pages))
  58                 ret = PTR_ERR(pages);
  59
  60         return ret;
  61 }
  62
  63 void msm_gem_prime_unpin(struct drm_gem_object *obj)
  64 {
  65         if (obj->import_attach)
  66                 return;
  67
  68         msm_gem_unpin_pages_locked(obj);
  69 }