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/*
* Copyright © 2017 Intel Corporation
*
* 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 (including the next
* paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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.
*
*/
#include "i915_drv.h"
#include "i915_gem_object.h"
#include "i915_globals.h"
static struct i915_global_object {
struct i915_global base;
struct kmem_cache *slab_objects;
} global;
struct drm_i915_gem_object *i915_gem_object_alloc(void)
{
return kmem_cache_zalloc(global.slab_objects, GFP_KERNEL);
}
void i915_gem_object_free(struct drm_i915_gem_object *obj)
{
return kmem_cache_free(global.slab_objects, obj);
}
/**
* Mark up the object's coherency levels for a given cache_level
* @obj: #drm_i915_gem_object
* @cache_level: cache level
*/
void i915_gem_object_set_cache_coherency(struct drm_i915_gem_object *obj,
unsigned int cache_level)
{
obj->cache_level = cache_level;
if (cache_level != I915_CACHE_NONE)
obj->cache_coherent = (I915_BO_CACHE_COHERENT_FOR_READ |
I915_BO_CACHE_COHERENT_FOR_WRITE);
else if (HAS_LLC(to_i915(obj->base.dev)))
obj->cache_coherent = I915_BO_CACHE_COHERENT_FOR_READ;
else
obj->cache_coherent = 0;
obj->cache_dirty =
!(obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_WRITE);
}
static void i915_global_objects_shrink(void)
{
kmem_cache_shrink(global.slab_objects);
}
static void i915_global_objects_exit(void)
{
kmem_cache_destroy(global.slab_objects);
}
static struct i915_global_object global = { {
.shrink = i915_global_objects_shrink,
.exit = i915_global_objects_exit,
} };
int __init i915_global_objects_init(void)
{
global.slab_objects =
KMEM_CACHE(drm_i915_gem_object, SLAB_HWCACHE_ALIGN);
if (!global.slab_objects)
return -ENOMEM;
i915_global_register(&global.base);
return 0;
}
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