161 lines
4.2 KiB
C
161 lines
4.2 KiB
C
/*
|
|
* Copyright (C) 2013 Red Hat
|
|
* Author: Rob Clark <robdclark@gmail.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published by
|
|
* the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/dma-buf.h>
|
|
#include "etnaviv_drv.h"
|
|
#include "etnaviv_gem.h"
|
|
|
|
static struct lock_class_key etnaviv_prime_lock_class;
|
|
|
|
struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj)
|
|
{
|
|
struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
|
|
int npages = obj->size >> PAGE_SHIFT;
|
|
|
|
if (WARN_ON(!etnaviv_obj->pages)) /* should have already pinned! */
|
|
return NULL;
|
|
|
|
return drm_prime_pages_to_sg(etnaviv_obj->pages, npages);
|
|
}
|
|
|
|
void *etnaviv_gem_prime_vmap(struct drm_gem_object *obj)
|
|
{
|
|
return etnaviv_gem_vmap(obj);
|
|
}
|
|
|
|
void etnaviv_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
|
|
{
|
|
/* TODO msm_gem_vunmap() */
|
|
}
|
|
|
|
int etnaviv_gem_prime_mmap(struct drm_gem_object *obj,
|
|
struct vm_area_struct *vma)
|
|
{
|
|
struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
|
|
int ret;
|
|
|
|
ret = drm_gem_mmap_obj(obj, obj->size, vma);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return etnaviv_obj->ops->mmap(etnaviv_obj, vma);
|
|
}
|
|
|
|
int etnaviv_gem_prime_pin(struct drm_gem_object *obj)
|
|
{
|
|
if (!obj->import_attach) {
|
|
struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
|
|
|
|
mutex_lock(&etnaviv_obj->lock);
|
|
etnaviv_gem_get_pages(etnaviv_obj);
|
|
mutex_unlock(&etnaviv_obj->lock);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void etnaviv_gem_prime_unpin(struct drm_gem_object *obj)
|
|
{
|
|
if (!obj->import_attach) {
|
|
struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
|
|
|
|
mutex_lock(&etnaviv_obj->lock);
|
|
etnaviv_gem_put_pages(to_etnaviv_bo(obj));
|
|
mutex_unlock(&etnaviv_obj->lock);
|
|
}
|
|
}
|
|
|
|
static void etnaviv_gem_prime_release(struct etnaviv_gem_object *etnaviv_obj)
|
|
{
|
|
if (etnaviv_obj->vaddr)
|
|
dma_buf_vunmap(etnaviv_obj->base.import_attach->dmabuf,
|
|
etnaviv_obj->vaddr);
|
|
|
|
/* Don't drop the pages for imported dmabuf, as they are not
|
|
* ours, just free the array we allocated:
|
|
*/
|
|
if (etnaviv_obj->pages)
|
|
kvfree(etnaviv_obj->pages);
|
|
|
|
drm_prime_gem_destroy(&etnaviv_obj->base, etnaviv_obj->sgt);
|
|
}
|
|
|
|
static void *etnaviv_gem_prime_vmap_impl(struct etnaviv_gem_object *etnaviv_obj)
|
|
{
|
|
lockdep_assert_held(&etnaviv_obj->lock);
|
|
|
|
return dma_buf_vmap(etnaviv_obj->base.import_attach->dmabuf);
|
|
}
|
|
|
|
static int etnaviv_gem_prime_mmap_obj(struct etnaviv_gem_object *etnaviv_obj,
|
|
struct vm_area_struct *vma)
|
|
{
|
|
return dma_buf_mmap(etnaviv_obj->base.dma_buf, vma, 0);
|
|
}
|
|
|
|
static const struct etnaviv_gem_ops etnaviv_gem_prime_ops = {
|
|
/* .get_pages should never be called */
|
|
.release = etnaviv_gem_prime_release,
|
|
.vmap = etnaviv_gem_prime_vmap_impl,
|
|
.mmap = etnaviv_gem_prime_mmap_obj,
|
|
};
|
|
|
|
struct drm_gem_object *etnaviv_gem_prime_import_sg_table(struct drm_device *dev,
|
|
struct dma_buf_attachment *attach, struct sg_table *sgt)
|
|
{
|
|
struct etnaviv_gem_object *etnaviv_obj;
|
|
size_t size = PAGE_ALIGN(attach->dmabuf->size);
|
|
int ret, npages;
|
|
|
|
ret = etnaviv_gem_new_private(dev, size, ETNA_BO_WC,
|
|
attach->dmabuf->resv,
|
|
&etnaviv_gem_prime_ops, &etnaviv_obj);
|
|
if (ret < 0)
|
|
return ERR_PTR(ret);
|
|
|
|
lockdep_set_class(&etnaviv_obj->lock, &etnaviv_prime_lock_class);
|
|
|
|
npages = size / PAGE_SIZE;
|
|
|
|
etnaviv_obj->sgt = sgt;
|
|
etnaviv_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
|
|
if (!etnaviv_obj->pages) {
|
|
ret = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
ret = drm_prime_sg_to_page_addr_arrays(sgt, etnaviv_obj->pages,
|
|
NULL, npages);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
etnaviv_gem_obj_add(dev, &etnaviv_obj->base);
|
|
|
|
return &etnaviv_obj->base;
|
|
|
|
fail:
|
|
drm_gem_object_put_unlocked(&etnaviv_obj->base);
|
|
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
struct reservation_object *etnaviv_gem_prime_res_obj(struct drm_gem_object *obj)
|
|
{
|
|
struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
|
|
|
|
return etnaviv_obj->resv;
|
|
}
|