LXR linux/drivers/gpu/drm/nouveau/nouveau

   1/*
   2 * Copyright 2011 Red Hat 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 * Authors: Dave Airlie
  23 */
  24
  25#include <linux/dma-buf.h>
  26
  27#include "nouveau_drv.h"
  28#include "nouveau_gem.h"
  29
  30struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *obj)
  31{
  32        struct nouveau_bo *nvbo = nouveau_gem_object(obj);
  33        int npages = nvbo->bo.num_pages;
  34
  35        return drm_prime_pages_to_sg(nvbo->bo.ttm->pages, npages);
  36}
  37
  38void *nouveau_gem_prime_vmap(struct drm_gem_object *obj)
  39{
  40        struct nouveau_bo *nvbo = nouveau_gem_object(obj);
  41        int ret;
  42
  43        ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.num_pages,
  44                          &nvbo->dma_buf_vmap);
  45        if (ret)
  46                return ERR_PTR(ret);
  47
  48        return nvbo->dma_buf_vmap.virtual;
  49}
  50
  51void nouveau_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
  52{
  53        struct nouveau_bo *nvbo = nouveau_gem_object(obj);
  54
  55        ttm_bo_kunmap(&nvbo->dma_buf_vmap);
  56}
  57
  58struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev,
  59                                                         struct dma_buf_attachment *attach,
  60                                                         struct sg_table *sg)
  61{
  62        struct nouveau_drm *drm = nouveau_drm(dev);
  63        struct drm_gem_object *obj;
  64        struct nouveau_bo *nvbo;
  65        struct dma_resv *robj = attach->dmabuf->resv;
  66        u64 size = attach->dmabuf->size;
  67        u32 flags = 0;
  68        int align = 0;
  69        int ret;
  70
  71        flags = TTM_PL_FLAG_TT;
  72
  73        dma_resv_lock(robj, NULL);
  74        nvbo = nouveau_bo_alloc(&drm->client, &size, &align, flags, 0, 0);
  75        if (IS_ERR(nvbo)) {
  76                obj = ERR_CAST(nvbo);
  77                goto unlock;
  78        }
  79
  80        nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART;
  81
  82        /* Initialize the embedded gem-object. We return a single gem-reference
  83         * to the caller, instead of a normal nouveau_bo ttm reference. */
  84        ret = drm_gem_object_init(dev, &nvbo->bo.base, size);
  85        if (ret) {
  86                nouveau_bo_ref(NULL, &nvbo);
  87                obj = ERR_PTR(-ENOMEM);
  88                goto unlock;
  89        }
  90
  91        ret = nouveau_bo_init(nvbo, size, align, flags, sg, robj);
  92        if (ret) {
  93                nouveau_bo_ref(NULL, &nvbo);
  94                obj = ERR_PTR(ret);
  95                goto unlock;
  96        }
  97
  98        obj = &nvbo->bo.base;
  99
 100unlock:
 101        dma_resv_unlock(robj);
 102        return obj;
 103}
 104
 105int nouveau_gem_prime_pin(struct drm_gem_object *obj)
 106{
 107        struct nouveau_bo *nvbo = nouveau_gem_object(obj);
 108        int ret;
 109
 110        /* pin buffer into GTT */
 111        ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_TT, false);
 112        if (ret)
 113                return -EINVAL;
 114
 115        return 0;
 116}
 117
 118void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
 119{
 120        struct nouveau_bo *nvbo = nouveau_gem_object(obj);
 121
 122        nouveau_bo_unpin(nvbo);
 123}
 124