1/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
 2/*
 3 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
 4 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
 5 */
 6
 7#ifndef RXE_POOL_H
 8#define RXE_POOL_H
 9
10enum rxe_elem_type {
11	RXE_TYPE_UC,
12	RXE_TYPE_PD,
13	RXE_TYPE_AH,
14	RXE_TYPE_SRQ,
15	RXE_TYPE_QP,
16	RXE_TYPE_CQ,
17	RXE_TYPE_MR,
18	RXE_TYPE_MW,
19	RXE_NUM_TYPES,		/* keep me last */
20};
21
22struct rxe_pool_elem {
23	struct rxe_pool		*pool;
24	void			*obj;
25	struct kref		ref_cnt;
26	struct list_head	list;
27	struct completion	complete;
28	u32			index;
29};
30
31struct rxe_pool {
32	struct rxe_dev		*rxe;
33	const char		*name;
34	void			(*cleanup)(struct rxe_pool_elem *elem);
35	enum rxe_elem_type	type;
36
37	unsigned int		max_elem;
38	atomic_t		num_elem;
39	size_t			elem_size;
40	size_t			elem_offset;
41
42	struct xarray		xa;
43	struct xa_limit		limit;
44	u32			next;
45};
46
47/* initialize a pool of objects with given limit on
48 * number of elements. gets parameters from rxe_type_info
49 * pool elements will be allocated out of a slab cache
50 */
51void rxe_pool_init(struct rxe_dev *rxe, struct rxe_pool *pool,
52		  enum rxe_elem_type type);
53
54/* free resources from object pool */
55void rxe_pool_cleanup(struct rxe_pool *pool);
56
57/* allocate an object from pool */
58void *rxe_alloc(struct rxe_pool *pool);
59
60/* connect already allocated object to pool */
61int __rxe_add_to_pool(struct rxe_pool *pool, struct rxe_pool_elem *elem,
62				bool sleepable);
63#define rxe_add_to_pool(pool, obj) __rxe_add_to_pool(pool, &(obj)->elem, true)
64#define rxe_add_to_pool_ah(pool, obj, sleepable) __rxe_add_to_pool(pool, \
65				&(obj)->elem, sleepable)
66
67/* lookup an indexed object from index. takes a reference on object */
68void *rxe_pool_get_index(struct rxe_pool *pool, u32 index);
69
70int __rxe_get(struct rxe_pool_elem *elem);
71#define rxe_get(obj) __rxe_get(&(obj)->elem)
72
73int __rxe_put(struct rxe_pool_elem *elem);
74#define rxe_put(obj) __rxe_put(&(obj)->elem)
75
76int __rxe_cleanup(struct rxe_pool_elem *elem, bool sleepable);
77#define rxe_cleanup(obj) __rxe_cleanup(&(obj)->elem, true)
78#define rxe_cleanup_ah(obj, sleepable) __rxe_cleanup(&(obj)->elem, sleepable)
79
80#define rxe_read(obj) kref_read(&(obj)->elem.ref_cnt)
81
82void __rxe_finalize(struct rxe_pool_elem *elem);
83#define rxe_finalize(obj) __rxe_finalize(&(obj)->elem)
84
85#endif /* RXE_POOL_H */