2 * Copyright 2011 Red Hat Inc.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
22 * Authors: Dave Airlie
25 #include <linux/dma-buf.h>
27 #include "nouveau_drv.h"
28 #include "nouveau_gem.h"
30 struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *obj)
32 struct nouveau_bo *nvbo = nouveau_gem_object(obj);
33 int npages = nvbo->bo.num_pages;
35 return drm_prime_pages_to_sg(nvbo->bo.ttm->pages, npages);
38 void *nouveau_gem_prime_vmap(struct drm_gem_object *obj)
40 struct nouveau_bo *nvbo = nouveau_gem_object(obj);
43 ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.num_pages,
48 return nvbo->dma_buf_vmap.virtual;
51 void nouveau_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
53 struct nouveau_bo *nvbo = nouveau_gem_object(obj);
55 ttm_bo_kunmap(&nvbo->dma_buf_vmap);
58 struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev,
59 struct dma_buf_attachment *attach,
62 struct nouveau_drm *drm = nouveau_drm(dev);
63 struct nouveau_bo *nvbo;
64 struct dma_resv *robj = attach->dmabuf->resv;
65 size_t size = attach->dmabuf->size;
69 flags = TTM_PL_FLAG_TT;
71 dma_resv_lock(robj, NULL);
72 nvbo = nouveau_bo_alloc(&drm->client, size, flags, 0, 0);
73 dma_resv_unlock(robj);
75 return ERR_CAST(nvbo);
77 nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART;
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->bo.base, size);
83 nouveau_bo_ref(NULL, &nvbo);
84 return ERR_PTR(-ENOMEM);
87 ret = nouveau_bo_init(nvbo, size, 0, flags, sg, robj);
89 nouveau_bo_ref(NULL, &nvbo);
93 return &nvbo->bo.base;
96 int nouveau_gem_prime_pin(struct drm_gem_object *obj)
98 struct nouveau_bo *nvbo = nouveau_gem_object(obj);
101 /* pin buffer into GTT */
102 ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_TT, false);
109 void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
111 struct nouveau_bo *nvbo = nouveau_gem_object(obj);
113 nouveau_bo_unpin(nvbo);