drivers/gpu/drm/nouveau/nouveau_prime.c

   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_drm.h"
  29 #include "nouveau_gem.h"
  30
  31 struct 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
  39 void *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
  52 void 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
  59 struct 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_bo *nvbo;
  64         struct reservation_object *robj = attach->dmabuf->resv;
  65         u32 flags = 0;
  66         int ret;
  67
  68         flags = TTM_PL_FLAG_TT;
  69
  70         ww_mutex_lock(&robj->lock, NULL);
  71         ret = nouveau_bo_new(dev, attach->dmabuf->size, 0, flags, 0, 0,
  72                              sg, robj, &nvbo);
  73         ww_mutex_unlock(&robj->lock);
  74         if (ret)
  75                 return ERR_PTR(ret);
  76
  77         nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART;
  78
  79         /* Initialize the embedded gem-object. We return a single gem-reference
  80          * to the caller, instead of a normal nouveau_bo ttm reference. */
  81         ret = drm_gem_object_init(dev, &nvbo->gem, nvbo->bo.mem.size);
  82         if (ret) {
  83                 nouveau_bo_ref(NULL, &nvbo);
  84                 return ERR_PTR(-ENOMEM);
  85         }
  86
  87         return &nvbo->gem;
  88 }
  89
  90 int nouveau_gem_prime_pin(struct drm_gem_object *obj)
  91 {
  92         struct nouveau_bo *nvbo = nouveau_gem_object(obj);
  93         int ret;
  94
  95         /* pin buffer into GTT */
  96         ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_TT, false);
  97         if (ret)
  98                 return -EINVAL;
  99
 100         return 0;
 101 }
 102
 103 void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
 104 {
 105         struct nouveau_bo *nvbo = nouveau_gem_object(obj);
 106
 107         nouveau_bo_unpin(nvbo);
 108 }
 109
 110 struct reservation_object *nouveau_gem_prime_res_obj(struct drm_gem_object *obj)
 111 {
 112         struct nouveau_bo *nvbo = nouveau_gem_object(obj);
 113
 114         return nvbo->bo.resv;
 115 }