drivers/gpu/drm/radeon/radeon_prime.c

   1 /*
   2  * Copyright 2012 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * based on nouveau_prime.c
  23  *
  24  * Authors: Alex Deucher
  25  */
  26 #include <drm/drmP.h>
  27
  28 #include "radeon.h"
  29 #include <drm/radeon_drm.h>
  30
  31 struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj)
  32 {
  33         struct radeon_bo *bo = gem_to_radeon_bo(obj);
  34         int npages = bo->tbo.num_pages;
  35
  36         return drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages);
  37 }
  38
  39 void *radeon_gem_prime_vmap(struct drm_gem_object *obj)
  40 {
  41         struct radeon_bo *bo = gem_to_radeon_bo(obj);
  42         int ret;
  43
  44         ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages,
  45                           &bo->dma_buf_vmap);
  46         if (ret)
  47                 return ERR_PTR(ret);
  48
  49         return bo->dma_buf_vmap.virtual;
  50 }
  51
  52 void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
  53 {
  54         struct radeon_bo *bo = gem_to_radeon_bo(obj);
  55
  56         ttm_bo_kunmap(&bo->dma_buf_vmap);
  57 }
  58
  59 struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev,
  60                                                         size_t size,
  61                                                         struct sg_table *sg)
  62 {
  63         struct radeon_device *rdev = dev->dev_private;
  64         struct radeon_bo *bo;
  65         int ret;
  66
  67         ret = radeon_bo_create(rdev, size, PAGE_SIZE, false,
  68                                RADEON_GEM_DOMAIN_GTT, 0, sg, &bo);
  69         if (ret)
  70                 return ERR_PTR(ret);
  71
  72         mutex_lock(&rdev->gem.mutex);
  73         list_add_tail(&bo->list, &rdev->gem.objects);
  74         mutex_unlock(&rdev->gem.mutex);
  75
  76         return &bo->gem_base;
  77 }
  78
  79 int radeon_gem_prime_pin(struct drm_gem_object *obj)
  80 {
  81         struct radeon_bo *bo = gem_to_radeon_bo(obj);
  82         int ret = 0;
  83
  84         ret = radeon_bo_reserve(bo, false);
  85         if (unlikely(ret != 0))
  86                 return ret;
  87
  88         /* pin buffer into GTT */
  89         ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL);
  90         radeon_bo_unreserve(bo);
  91         return ret;
  92 }
  93
  94 void radeon_gem_prime_unpin(struct drm_gem_object *obj)
  95 {
  96         struct radeon_bo *bo = gem_to_radeon_bo(obj);
  97         int ret = 0;
  98
  99         ret = radeon_bo_reserve(bo, false);
 100         if (unlikely(ret != 0))
 101                 return;
 102
 103         radeon_bo_unpin(bo);
 104         radeon_bo_unreserve(bo);
 105 }
 106
 107 struct dma_buf *radeon_gem_prime_export(struct drm_device *dev,
 108                                         struct drm_gem_object *gobj,
 109                                         int flags)
 110 {
 111         struct radeon_bo *bo = gem_to_radeon_bo(gobj);
 112         if (radeon_ttm_tt_has_userptr(bo->tbo.ttm))
 113                 return ERR_PTR(-EPERM);
 114         return drm_gem_prime_export(dev, gobj, flags);
 115 }