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/*
* gk20a allocator
*
* Copyright (c) 2011-2017, 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 <nvgpu/allocator.h>
#include "gk20a/gk20a.h"
#include "gk20a/mm_gk20a.h"
#include "gk20a/platform_gk20a.h"
u32 nvgpu_alloc_tracing_on;
u64 nvgpu_alloc_length(struct nvgpu_allocator *a)
{
if (a->ops->length)
return a->ops->length(a);
return 0;
}
u64 nvgpu_alloc_base(struct nvgpu_allocator *a)
{
if (a->ops->base)
return a->ops->base(a);
return 0;
}
u64 nvgpu_alloc_initialized(struct nvgpu_allocator *a)
{
if (!a->ops || !a->ops->inited)
return 0;
return a->ops->inited(a);
}
u64 nvgpu_alloc_end(struct nvgpu_allocator *a)
{
if (a->ops->end)
return a->ops->end(a);
return 0;
}
u64 nvgpu_alloc_space(struct nvgpu_allocator *a)
{
if (a->ops->space)
return a->ops->space(a);
return 0;
}
u64 nvgpu_alloc(struct nvgpu_allocator *a, u64 len)
{
return a->ops->alloc(a, len);
}
void nvgpu_free(struct nvgpu_allocator *a, u64 addr)
{
a->ops->free(a, addr);
}
u64 nvgpu_alloc_fixed(struct nvgpu_allocator *a, u64 base, u64 len,
u32 page_size)
{
if (a->ops->alloc_fixed)
return a->ops->alloc_fixed(a, base, len, page_size);
return 0;
}
void nvgpu_free_fixed(struct nvgpu_allocator *a, u64 base, u64 len)
{
/*
* If this operation is not defined for the allocator then just do
* nothing. The alternative would be to fall back on the regular
* free but that may be harmful in unexpected ways.
*/
if (a->ops->free_fixed)
a->ops->free_fixed(a, base, len);
}
int nvgpu_alloc_reserve_carveout(struct nvgpu_allocator *a,
struct nvgpu_alloc_carveout *co)
{
if (a->ops->reserve_carveout)
return a->ops->reserve_carveout(a, co);
return -ENODEV;
}
void nvgpu_alloc_release_carveout(struct nvgpu_allocator *a,
struct nvgpu_alloc_carveout *co)
{
if (a->ops->release_carveout)
a->ops->release_carveout(a, co);
}
void nvgpu_alloc_destroy(struct nvgpu_allocator *a)
{
a->ops->fini(a);
memset(a, 0, sizeof(*a));
}
/*
* Handle the common init stuff for a nvgpu_allocator.
*/
int __nvgpu_alloc_common_init(struct nvgpu_allocator *a,
const char *name, void *priv, bool dbg,
const struct nvgpu_allocator_ops *ops)
{
if (!ops)
return -EINVAL;
/*
* This is the bare minimum operations required for a sensible
* allocator.
*/
if (!ops->alloc || !ops->free || !ops->fini)
return -EINVAL;
a->ops = ops;
a->priv = priv;
a->debug = dbg;
nvgpu_mutex_init(&a->lock);
strlcpy(a->name, name, sizeof(a->name));
return 0;
}
void nvgpu_alloc_print_stats(struct nvgpu_allocator *__a,
struct seq_file *s, int lock)
{
__a->ops->print_stats(__a, s, lock);
}
#ifdef CONFIG_DEBUG_FS
static int __alloc_show(struct seq_file *s, void *unused)
{
struct nvgpu_allocator *a = s->private;
nvgpu_alloc_print_stats(a, s, 1);
return 0;
}
static int __alloc_open(struct inode *inode, struct file *file)
{
return single_open(file, __alloc_show, inode->i_private);
}
static const struct file_operations __alloc_fops = {
.open = __alloc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
#endif
void nvgpu_init_alloc_debug(struct gk20a *g, struct nvgpu_allocator *a)
{
#ifdef CONFIG_DEBUG_FS
if (!g->debugfs_allocators)
return;
a->debugfs_entry = debugfs_create_file(a->name, S_IRUGO,
g->debugfs_allocators,
a, &__alloc_fops);
#endif
}
void nvgpu_fini_alloc_debug(struct nvgpu_allocator *a)
{
#ifdef CONFIG_DEBUG_FS
if (!IS_ERR_OR_NULL(a->debugfs_entry))
debugfs_remove(a->debugfs_entry);
#endif
}
void nvgpu_alloc_debugfs_init(struct device *dev)
{
#ifdef CONFIG_DEBUG_FS
struct gk20a_platform *platform = dev_get_drvdata(dev);
struct dentry *gpu_root = platform->debugfs;
struct gk20a *g = get_gk20a(dev);
g->debugfs_allocators = debugfs_create_dir("allocators", gpu_root);
if (IS_ERR_OR_NULL(g->debugfs_allocators))
return;
debugfs_create_u32("tracing", 0664, g->debugfs_allocators,
&nvgpu_alloc_tracing_on);
#endif
}
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