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 <drm/drmP.h>
  26
  27#include "nouveau_drm.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                                                         size_t size,
  60                                                         struct sg_table *sg)
  61{
  62        struct nouveau_bo *nvbo;
  63        u32 flags = 0;
  64        int ret;
  65
  66        flags = TTM_PL_FLAG_TT;
  67
  68        ret = nouveau_bo_new(dev, size, 0, flags, 0, 0,
  69                             sg, &nvbo);
  70        if (ret)
  71                return ERR_PTR(ret);
  72
  73        nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART;
  74
  75        /* Initialize the embedded gem-object. We return a single gem-reference
  76         * to the caller, instead of a normal nouveau_bo ttm reference. */
  77        ret = drm_gem_object_init(dev, &nvbo->gem, nvbo->bo.mem.size);
  78        if (ret) {
  79                nouveau_bo_ref(NULL, &nvbo);
  80                return ERR_PTR(-ENOMEM);
  81        }
  82
  83        return &nvbo->gem;
  84}
  85
  86int nouveau_gem_prime_pin(struct drm_gem_object *obj)
  87{
  88        struct nouveau_bo *nvbo = nouveau_gem_object(obj);
  89        int ret;
  90
  91        /* pin buffer into GTT */
  92        ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_TT);
  93        if (ret)
  94                return -EINVAL;
  95
  96        return 0;
  97}
  98
  99void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
 100{
 101        struct nouveau_bo *nvbo = nouveau_gem_object(obj);
 102
 103        nouveau_bo_unpin(nvbo);
 104}
 105