cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

nouveau_prime.c (3016B)

      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 <linux/dma-buf.h>
     26
     27#include "nouveau_drv.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
     34	return drm_prime_pages_to_sg(obj->dev, nvbo->bo.ttm->pages,
     35				     nvbo->bo.ttm->num_pages);
     36}
     37
     38struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev,
     39							 struct dma_buf_attachment *attach,
     40							 struct sg_table *sg)
     41{
     42	struct nouveau_drm *drm = nouveau_drm(dev);
     43	struct drm_gem_object *obj;
     44	struct nouveau_bo *nvbo;
     45	struct dma_resv *robj = attach->dmabuf->resv;
     46	u64 size = attach->dmabuf->size;
     47	int align = 0;
     48	int ret;
     49
     50	dma_resv_lock(robj, NULL);
     51	nvbo = nouveau_bo_alloc(&drm->client, &size, &align,
     52				NOUVEAU_GEM_DOMAIN_GART, 0, 0);
     53	if (IS_ERR(nvbo)) {
     54		obj = ERR_CAST(nvbo);
     55		goto unlock;
     56	}
     57
     58	nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART;
     59
     60	nvbo->bo.base.funcs = &nouveau_gem_object_funcs;
     61
     62	/* Initialize the embedded gem-object. We return a single gem-reference
     63	 * to the caller, instead of a normal nouveau_bo ttm reference. */
     64	ret = drm_gem_object_init(dev, &nvbo->bo.base, size);
     65	if (ret) {
     66		nouveau_bo_ref(NULL, &nvbo);
     67		obj = ERR_PTR(-ENOMEM);
     68		goto unlock;
     69	}
     70
     71	ret = nouveau_bo_init(nvbo, size, align, NOUVEAU_GEM_DOMAIN_GART,
     72			      sg, robj);
     73	if (ret) {
     74		nouveau_bo_ref(NULL, &nvbo);
     75		obj = ERR_PTR(ret);
     76		goto unlock;
     77	}
     78
     79	obj = &nvbo->bo.base;
     80
     81unlock:
     82	dma_resv_unlock(robj);
     83	return obj;
     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, NOUVEAU_GEM_DOMAIN_GART, false);
     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}