cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

spectrum_kvdl.c (2170B)

      1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
      2/* Copyright (c) 2016-2018 Mellanox Technologies. All rights reserved */
      3
      4#include <linux/kernel.h>
      5#include <linux/mutex.h>
      6#include <linux/slab.h>
      7
      8#include "spectrum.h"
      9
     10struct mlxsw_sp_kvdl {
     11	const struct mlxsw_sp_kvdl_ops *kvdl_ops;
     12	struct mutex kvdl_lock; /* Protects kvdl allocations */
     13	unsigned long priv[];
     14	/* priv has to be always the last item */
     15};
     16
     17int mlxsw_sp_kvdl_init(struct mlxsw_sp *mlxsw_sp)
     18{
     19	const struct mlxsw_sp_kvdl_ops *kvdl_ops = mlxsw_sp->kvdl_ops;
     20	struct mlxsw_sp_kvdl *kvdl;
     21	int err;
     22
     23	kvdl = kzalloc(sizeof(*mlxsw_sp->kvdl) + kvdl_ops->priv_size,
     24		       GFP_KERNEL);
     25	if (!kvdl)
     26		return -ENOMEM;
     27	mutex_init(&kvdl->kvdl_lock);
     28	kvdl->kvdl_ops = kvdl_ops;
     29	mlxsw_sp->kvdl = kvdl;
     30
     31	err = kvdl_ops->init(mlxsw_sp, kvdl->priv);
     32	if (err)
     33		goto err_init;
     34	return 0;
     35
     36err_init:
     37	mutex_destroy(&kvdl->kvdl_lock);
     38	kfree(kvdl);
     39	return err;
     40}
     41
     42void mlxsw_sp_kvdl_fini(struct mlxsw_sp *mlxsw_sp)
     43{
     44	struct mlxsw_sp_kvdl *kvdl = mlxsw_sp->kvdl;
     45
     46	kvdl->kvdl_ops->fini(mlxsw_sp, kvdl->priv);
     47	mutex_destroy(&kvdl->kvdl_lock);
     48	kfree(kvdl);
     49}
     50
     51int mlxsw_sp_kvdl_alloc(struct mlxsw_sp *mlxsw_sp,
     52			enum mlxsw_sp_kvdl_entry_type type,
     53			unsigned int entry_count, u32 *p_entry_index)
     54{
     55	struct mlxsw_sp_kvdl *kvdl = mlxsw_sp->kvdl;
     56	int err;
     57
     58	mutex_lock(&kvdl->kvdl_lock);
     59	err = kvdl->kvdl_ops->alloc(mlxsw_sp, kvdl->priv, type,
     60				    entry_count, p_entry_index);
     61	mutex_unlock(&kvdl->kvdl_lock);
     62
     63	return err;
     64}
     65
     66void mlxsw_sp_kvdl_free(struct mlxsw_sp *mlxsw_sp,
     67			enum mlxsw_sp_kvdl_entry_type type,
     68			unsigned int entry_count, int entry_index)
     69{
     70	struct mlxsw_sp_kvdl *kvdl = mlxsw_sp->kvdl;
     71
     72	mutex_lock(&kvdl->kvdl_lock);
     73	kvdl->kvdl_ops->free(mlxsw_sp, kvdl->priv, type,
     74			     entry_count, entry_index);
     75	mutex_unlock(&kvdl->kvdl_lock);
     76}
     77
     78int mlxsw_sp_kvdl_alloc_count_query(struct mlxsw_sp *mlxsw_sp,
     79				    enum mlxsw_sp_kvdl_entry_type type,
     80				    unsigned int entry_count,
     81				    unsigned int *p_alloc_count)
     82{
     83	struct mlxsw_sp_kvdl *kvdl = mlxsw_sp->kvdl;
     84
     85	return kvdl->kvdl_ops->alloc_size_query(mlxsw_sp, kvdl->priv, type,
     86						entry_count, p_alloc_count);
     87}