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1/*2 * Copyright 2011 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: Dave Airlie23 */24 25#include <linux/dma-buf.h>26#include <drm/ttm/ttm_tt.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 35 return drm_prime_pages_to_sg(obj->dev, nvbo->bo.ttm->pages,36 nvbo->bo.ttm->num_pages);37}38 39struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev,40 struct dma_buf_attachment *attach,41 struct sg_table *sg)42{43 struct nouveau_drm *drm = nouveau_drm(dev);44 struct drm_gem_object *obj;45 struct nouveau_bo *nvbo;46 struct dma_resv *robj = attach->dmabuf->resv;47 u64 size = attach->dmabuf->size;48 int align = 0;49 int ret;50 51 dma_resv_lock(robj, NULL);52 nvbo = nouveau_bo_alloc(&drm->client, &size, &align,53 NOUVEAU_GEM_DOMAIN_GART, 0, 0, true);54 if (IS_ERR(nvbo)) {55 obj = ERR_CAST(nvbo);56 goto unlock;57 }58 59 nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART;60 61 nvbo->bo.base.funcs = &nouveau_gem_object_funcs;62 63 /* Initialize the embedded gem-object. We return a single gem-reference64 * to the caller, instead of a normal nouveau_bo ttm reference. */65 ret = drm_gem_object_init(dev, &nvbo->bo.base, size);66 if (ret) {67 drm_gem_object_release(&nvbo->bo.base);68 kfree(nvbo);69 obj = ERR_PTR(-ENOMEM);70 goto unlock;71 }72 73 ret = nouveau_bo_init(nvbo, size, align, NOUVEAU_GEM_DOMAIN_GART,74 sg, robj);75 if (ret) {76 obj = ERR_PTR(ret);77 goto unlock;78 }79 80 obj = &nvbo->bo.base;81 82unlock:83 dma_resv_unlock(robj);84 return obj;85}86 87int nouveau_gem_prime_pin(struct drm_gem_object *obj)88{89 struct nouveau_bo *nvbo = nouveau_gem_object(obj);90 int ret;91 92 /* pin buffer into GTT */93 ret = nouveau_bo_pin_locked(nvbo, NOUVEAU_GEM_DOMAIN_GART, false);94 if (ret)95 ret = -EINVAL;96 97 return ret;98}99 100void nouveau_gem_prime_unpin(struct drm_gem_object *obj)101{102 struct nouveau_bo *nvbo = nouveau_gem_object(obj);103 104 nouveau_bo_unpin_locked(nvbo);105}106 107struct dma_buf *nouveau_gem_prime_export(struct drm_gem_object *gobj,108 int flags)109{110 struct nouveau_bo *nvbo = nouveau_gem_object(gobj);111 112 if (nvbo->no_share)113 return ERR_PTR(-EPERM);114 115 return drm_gem_prime_export(gobj, flags);116}117