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