LXR linux/drivers/gpu/drm/radeon/radeon

   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#include <linux/dma-buf.h>
  31
  32struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj)
  33{
  34        struct radeon_bo *bo = gem_to_radeon_bo(obj);
  35        int npages = bo->tbo.num_pages;
  36
  37        return drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages);
  38}
  39
  40void *radeon_gem_prime_vmap(struct drm_gem_object *obj)
  41{
  42        struct radeon_bo *bo = gem_to_radeon_bo(obj);
  43        int ret;
  44
  45        ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages,
  46                          &bo->dma_buf_vmap);
  47        if (ret)
  48                return ERR_PTR(ret);
  49
  50        return bo->dma_buf_vmap.virtual;
  51}
  52
  53void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
  54{
  55        struct radeon_bo *bo = gem_to_radeon_bo(obj);
  56
  57        ttm_bo_kunmap(&bo->dma_buf_vmap);
  58}
  59
  60struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev,
  61                                                        struct dma_buf_attachment *attach,
  62                                                        struct sg_table *sg)
  63{
  64        struct reservation_object *resv = attach->dmabuf->resv;
  65        struct radeon_device *rdev = dev->dev_private;
  66        struct radeon_bo *bo;
  67        int ret;
  68
  69        ww_mutex_lock(&resv->lock, NULL);
  70        ret = radeon_bo_create(rdev, attach->dmabuf->size, PAGE_SIZE, false,
  71                               RADEON_GEM_DOMAIN_GTT, 0, sg, resv, &bo);
  72        ww_mutex_unlock(&resv->lock);
  73        if (ret)
  74                return ERR_PTR(ret);
  75
  76        mutex_lock(&rdev->gem.mutex);
  77        list_add_tail(&bo->list, &rdev->gem.objects);
  78        mutex_unlock(&rdev->gem.mutex);
  79
  80        bo->prime_shared_count = 1;
  81        return &bo->gem_base;
  82}
  83
  84int radeon_gem_prime_pin(struct drm_gem_object *obj)
  85{
  86        struct radeon_bo *bo = gem_to_radeon_bo(obj);
  87        int ret = 0;
  88
  89        ret = radeon_bo_reserve(bo, false);
  90        if (unlikely(ret != 0))
  91                return ret;
  92
  93        /* pin buffer into GTT */
  94        ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL);
  95        if (likely(ret == 0))
  96                bo->prime_shared_count++;
  97
  98        radeon_bo_unreserve(bo);
  99        return ret;
 100}
 101
 102void radeon_gem_prime_unpin(struct drm_gem_object *obj)
 103{
 104        struct radeon_bo *bo = gem_to_radeon_bo(obj);
 105        int ret = 0;
 106
 107        ret = radeon_bo_reserve(bo, false);
 108        if (unlikely(ret != 0))
 109                return;
 110
 111        radeon_bo_unpin(bo);
 112        if (bo->prime_shared_count)
 113                bo->prime_shared_count--;
 114        radeon_bo_unreserve(bo);
 115}
 116
 117
 118struct reservation_object *radeon_gem_prime_res_obj(struct drm_gem_object *obj)
 119{
 120        struct radeon_bo *bo = gem_to_radeon_bo(obj);
 121
 122        return bo->tbo.resv;
 123}
 124
 125struct dma_buf *radeon_gem_prime_export(struct drm_device *dev,
 126                                        struct drm_gem_object *gobj,
 127                                        int flags)
 128{
 129        struct radeon_bo *bo = gem_to_radeon_bo(gobj);
 130        if (radeon_ttm_tt_has_userptr(bo->tbo.ttm))
 131                return ERR_PTR(-EPERM);
 132        return drm_gem_prime_export(dev, gobj, flags);
 133}
 134