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/*
* Copyright 2011 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Dave Airlie
*/
#include <linux/dma-buf.h>
#include "nouveau_drv.h"
#include "nouveau_gem.h"
struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *obj)
{
struct nouveau_bo *nvbo = nouveau_gem_object(obj);
int npages = nvbo->bo.num_pages;
return drm_prime_pages_to_sg(nvbo->bo.ttm->pages, npages);
}
void *nouveau_gem_prime_vmap(struct drm_gem_object *obj)
{
struct nouveau_bo *nvbo = nouveau_gem_object(obj);
int ret;
ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.num_pages,
&nvbo->dma_buf_vmap);
if (ret)
return ERR_PTR(ret);
return nvbo->dma_buf_vmap.virtual;
}
void nouveau_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
{
struct nouveau_bo *nvbo = nouveau_gem_object(obj);
ttm_bo_kunmap(&nvbo->dma_buf_vmap);
}
struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev,
struct dma_buf_attachment *attach,
struct sg_table *sg)
{
struct nouveau_drm *drm = nouveau_drm(dev);
struct drm_gem_object *obj;
struct nouveau_bo *nvbo;
struct dma_resv *robj = attach->dmabuf->resv;
u64 size = attach->dmabuf->size;
u32 flags = 0;
int align = 0;
int ret;
flags = TTM_PL_FLAG_TT;
dma_resv_lock(robj, NULL);
nvbo = nouveau_bo_alloc(&drm->client, &size, &align, flags, 0, 0);
if (IS_ERR(nvbo)) {
obj = ERR_CAST(nvbo);
goto unlock;
}
nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART;
/* Initialize the embedded gem-object. We return a single gem-reference
* to the caller, instead of a normal nouveau_bo ttm reference. */
ret = drm_gem_object_init(dev, &nvbo->bo.base, size);
if (ret) {
nouveau_bo_ref(NULL, &nvbo);
obj = ERR_PTR(-ENOMEM);
goto unlock;
}
ret = nouveau_bo_init(nvbo, size, align, flags, sg, robj);
if (ret) {
obj = ERR_PTR(ret);
goto unlock;
}
obj = &nvbo->bo.base;
unlock:
dma_resv_unlock(robj);
return obj;
}
int nouveau_gem_prime_pin(struct drm_gem_object *obj)
{
struct nouveau_bo *nvbo = nouveau_gem_object(obj);
int ret;
/* pin buffer into GTT */
ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_TT, false);
if (ret)
return -EINVAL;
ret = ttm_bo_reserve(&nvbo->bo, false, false, NULL);
if (ret)
goto error;
if (nvbo->bo.moving)
ret = dma_fence_wait(nvbo->bo.moving, true);
ttm_bo_unreserve(&nvbo->bo);
if (ret)
goto error;
return ret;
error:
nouveau_bo_unpin(nvbo);
return ret;
}
void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
{
struct nouveau_bo *nvbo = nouveau_gem_object(obj);
nouveau_bo_unpin(nvbo);
}
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