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/*
* Copyright (c) 2019 Intel Corporation.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _MEMTANK_H_
#define _MEMTANK_H_
#include <tle_memtank.h>
#include <stdalign.h>
struct memobj {
uint64_t red_zone1;
struct memchunk *chunk; /* ptr to the chunk it belongs to */
struct {
uint32_t nb_alloc;
uint32_t nb_free;
} dbg;
uint64_t red_zone2;
};
#define RED_ZONE_V1 UINT64_C(0xBADECAFEBADECAFE)
#define RED_ZONE_V2 UINT64_C(0xDEADBEEFDEADBEEF)
struct memchunk {
TAILQ_ENTRY(memchunk) link; /* link to the next chunk in the tank */
void *raw; /* un-aligned ptr returned by alloc() */
uint32_t nb_total; /* total number of objects in the chunk */
uint32_t nb_free; /* number of free object in the chunk */
void *free[]; /* array of free objects */
} __rte_cache_aligned;
TAILQ_HEAD(mchunk_head, memchunk);
struct mchunk_list {
rte_spinlock_t lock;
struct mchunk_head chunk; /* list of chunks */
} __rte_cache_aligned;
enum {
MC_FULL, /* all memchunk objs are free */
MC_USED, /* some of memchunk objs are allocated */
MC_NUM,
};
struct memtank {
/* user provided data */
struct tle_memtank_prm prm;
/*run-time data */
void *raw; /* un-aligned ptr returned by alloc() */
size_t chunk_size; /* full size of each memchunk */
uint32_t obj_size; /* full size of each memobj */
uint32_t max_chunk; /* max allowed number of chunks */
uint32_t flags; /* behavior flags */
rte_atomic32_t nb_chunks; /* number of allocated chunks */
struct mchunk_list chl[MC_NUM]; /* lists of memchunks */
struct tle_memtank pub;
};
/*
* Obtain pointer to interal memtank struct from public one
*/
static inline struct memtank *
tank_pub_full(const void *p)
{
uintptr_t v;
v = (uintptr_t)p - offsetof(struct memtank, pub);
return (struct memtank *)v;
}
/*
* Obtain pointer to interal memobj struct from public one
*/
static inline struct memobj *
obj_pub_full(uintptr_t p, uint32_t obj_sz)
{
uintptr_t v;
v = p + obj_sz - sizeof(struct memobj);
return (struct memobj *)v;
}
static inline int
memobj_verify(const struct memobj *mo, uint32_t finc)
{
if (mo->red_zone1 != RED_ZONE_V1 || mo->red_zone2 != RED_ZONE_V2 ||
mo->dbg.nb_alloc != mo->dbg.nb_free + finc)
return -EINVAL;
return 0;
}
#endif /* _MEMTANK_H_ */
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