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/* SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause */
/*
* Copyright 2026 Amazon.com, Inc. or its affiliates. All rights reserved.
*/
#ifndef _EFA_AH_CACHE_H_
#define _EFA_AH_CACHE_H_
#include <linux/refcount.h>
#include <linux/rhashtable.h>
#define EFA_AH_GID_SIZE 16
struct efa_ah_cache_key {
u8 gid[EFA_AH_GID_SIZE];
u16 pd;
};
struct efa_ah_cache_entry {
struct efa_ah_cache_key key;
u16 ah;
unsigned int usecnt;
refcount_t refcount;
struct rhash_head linkage;
struct mutex lock; /* Serializes device commands per cache entry */
};
struct efa_ah_cache {
struct rhashtable hashtable;
struct mutex lock; /* Protects AH cache hashtable */
};
int efa_ah_cache_init(struct efa_ah_cache *ah_cache);
void efa_ah_cache_destroy(struct efa_ah_cache *ah_cache);
struct efa_ah_cache_entry *efa_ah_cache_get(struct efa_ah_cache *ah_cache, u16 pd, u8 *gid);
struct efa_ah_cache_entry *efa_ah_cache_lookup(struct efa_ah_cache *ah_cache, u16 pd, u8 *gid);
void efa_ah_cache_put(struct efa_ah_cache *ah_cache, struct efa_ah_cache_entry *entry);
#endif /* _EFA_AH_CACHE_H_ */
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