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/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*/
#ifndef RXE_POOL_H
#define RXE_POOL_H
#define RXE_POOL_ALIGN (16)
#define RXE_POOL_CACHE_FLAGS (0)
enum rxe_pool_flags {
RXE_POOL_INDEX = BIT(1),
RXE_POOL_KEY = BIT(2),
RXE_POOL_NO_ALLOC = BIT(4),
};
enum rxe_elem_type {
RXE_TYPE_UC,
RXE_TYPE_PD,
RXE_TYPE_AH,
RXE_TYPE_SRQ,
RXE_TYPE_QP,
RXE_TYPE_CQ,
RXE_TYPE_MR,
RXE_TYPE_MW,
RXE_TYPE_MC_GRP,
RXE_TYPE_MC_ELEM,
RXE_NUM_TYPES, /* keep me last */
};
struct rxe_pool_entry;
struct rxe_type_info {
const char *name;
size_t size;
size_t elem_offset;
void (*cleanup)(struct rxe_pool_entry *obj);
enum rxe_pool_flags flags;
u32 max_index;
u32 min_index;
size_t key_offset;
size_t key_size;
};
extern struct rxe_type_info rxe_type_info[];
struct rxe_pool_entry {
struct rxe_pool *pool;
struct kref ref_cnt;
struct list_head list;
/* only used if keyed */
struct rb_node key_node;
/* only used if indexed */
struct rb_node index_node;
u32 index;
};
struct rxe_pool {
struct rxe_dev *rxe;
rwlock_t pool_lock; /* protects pool add/del/search */
size_t elem_size;
void (*cleanup)(struct rxe_pool_entry *obj);
enum rxe_pool_flags flags;
enum rxe_elem_type type;
unsigned int max_elem;
atomic_t num_elem;
/* only used if indexed */
struct {
struct rb_root tree;
unsigned long *table;
u32 last;
u32 max_index;
u32 min_index;
} index;
/* only used if keyed */
struct {
struct rb_root tree;
size_t key_offset;
size_t key_size;
} key;
};
/* initialize a pool of objects with given limit on
* number of elements. gets parameters from rxe_type_info
* pool elements will be allocated out of a slab cache
*/
int rxe_pool_init(struct rxe_dev *rxe, struct rxe_pool *pool,
enum rxe_elem_type type, u32 max_elem);
/* free resources from object pool */
void rxe_pool_cleanup(struct rxe_pool *pool);
/* allocate an object from pool holding and not holding the pool lock */
void *rxe_alloc_locked(struct rxe_pool *pool);
void *rxe_alloc(struct rxe_pool *pool);
/* connect already allocated object to pool */
int __rxe_add_to_pool(struct rxe_pool *pool, struct rxe_pool_entry *elem);
#define rxe_add_to_pool(pool, obj) __rxe_add_to_pool(pool, &(obj)->pelem)
/* assign an index to an indexed object and insert object into
* pool's rb tree holding and not holding the pool_lock
*/
int __rxe_add_index_locked(struct rxe_pool_entry *elem);
#define rxe_add_index_locked(obj) __rxe_add_index_locked(&(obj)->pelem)
int __rxe_add_index(struct rxe_pool_entry *elem);
#define rxe_add_index(obj) __rxe_add_index(&(obj)->pelem)
/* drop an index and remove object from rb tree
* holding and not holding the pool_lock
*/
void __rxe_drop_index_locked(struct rxe_pool_entry *elem);
#define rxe_drop_index_locked(obj) __rxe_drop_index_locked(&(obj)->pelem)
void __rxe_drop_index(struct rxe_pool_entry *elem);
#define rxe_drop_index(obj) __rxe_drop_index(&(obj)->pelem)
/* assign a key to a keyed object and insert object into
* pool's rb tree holding and not holding pool_lock
*/
int __rxe_add_key_locked(struct rxe_pool_entry *elem, void *key);
#define rxe_add_key_locked(obj, key) __rxe_add_key_locked(&(obj)->pelem, key)
int __rxe_add_key(struct rxe_pool_entry *elem, void *key);
#define rxe_add_key(obj, key) __rxe_add_key(&(obj)->pelem, key)
/* remove elem from rb tree holding and not holding the pool_lock */
void __rxe_drop_key_locked(struct rxe_pool_entry *elem);
#define rxe_drop_key_locked(obj) __rxe_drop_key_locked(&(obj)->pelem)
void __rxe_drop_key(struct rxe_pool_entry *elem);
#define rxe_drop_key(obj) __rxe_drop_key(&(obj)->pelem)
/* lookup an indexed object from index holding and not holding the pool_lock.
* takes a reference on object
*/
void *rxe_pool_get_index_locked(struct rxe_pool *pool, u32 index);
void *rxe_pool_get_index(struct rxe_pool *pool, u32 index);
/* lookup keyed object from key holding and not holding the pool_lock.
* takes a reference on the objecti
*/
void *rxe_pool_get_key_locked(struct rxe_pool *pool, void *key);
void *rxe_pool_get_key(struct rxe_pool *pool, void *key);
/* cleanup an object when all references are dropped */
void rxe_elem_release(struct kref *kref);
/* take a reference on an object */
#define rxe_add_ref(elem) kref_get(&(elem)->pelem.ref_cnt)
/* drop a reference on an object */
#define rxe_drop_ref(elem) kref_put(&(elem)->pelem.ref_cnt, rxe_elem_release)
#endif /* RXE_POOL_H */
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