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/*
* Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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/kernel.h>
#include <linux/slab.h>
#include <linux/atomic.h>
#include <nvgpu/kmem.h>
/*
* Statically declared because this needs to be shared across all nvgpu driver
* instances. This makes sure that all kmem caches are _definitely_ uniquely
* named.
*/
static atomic_t kmem_cache_id;
/*
* Linux specific version of the nvgpu_kmem_cache struct. This type is
* completely opaque to the rest of the driver.
*/
struct nvgpu_kmem_cache {
struct gk20a *g;
struct kmem_cache *cache;
/*
* Memory to hold the kmem_cache unique name. Only necessary on our
* k3.10 kernel when not using the SLUB allocator but it's easier to
* just carry this on to newer kernels.
*/
char name[128];
};
struct nvgpu_kmem_cache *nvgpu_kmem_cache_create(struct gk20a *g, size_t size)
{
struct nvgpu_kmem_cache *cache =
kzalloc(sizeof(struct nvgpu_kmem_cache), GFP_KERNEL);
if (!cache)
return NULL;
cache->g = g;
snprintf(cache->name, sizeof(cache->name),
"nvgpu-cache-0x%p-%d-%d", g, (int)size,
atomic_inc_return(&kmem_cache_id));
cache->cache = kmem_cache_create(cache->name,
size, size, 0, NULL);
if (!cache->cache) {
kfree(cache);
return NULL;
}
return cache;
}
void nvgpu_kmem_cache_destroy(struct nvgpu_kmem_cache *cache)
{
kmem_cache_destroy(cache->cache);
kfree(cache);
}
void *nvgpu_kmem_cache_alloc(struct nvgpu_kmem_cache *cache)
{
return kmem_cache_alloc(cache->cache, GFP_KERNEL);
}
void nvgpu_kmem_cache_free(struct nvgpu_kmem_cache *cache, void *ptr)
{
kmem_cache_free(cache->cache, ptr);
}
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