1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
/* 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_ATOMIC = BIT(0),
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;
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[];
enum rxe_pool_state {
RXE_POOL_STATE_INVALID,
RXE_POOL_STATE_VALID,
};
struct rxe_pool_entry {
struct rxe_pool *pool;
struct kref ref_cnt;
struct list_head list;
/* only used if indexed or keyed */
struct rb_node node;
u32 index;
};
struct rxe_pool {
struct rxe_dev *rxe;
rwlock_t pool_lock; /* protects pool add/del/search */
size_t elem_size;
struct kref ref_cnt;
void (*cleanup)(struct rxe_pool_entry *obj);
enum rxe_pool_state state;
enum rxe_pool_flags flags;
enum rxe_elem_type type;
unsigned int max_elem;
atomic_t num_elem;
/* only used if indexed or keyed */
struct rb_root tree;
unsigned long *table;
size_t table_size;
u32 max_index;
u32 min_index;
u32 last;
size_t key_offset;
size_t key_size;
};
/* 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 */
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);
/* assign an index to an indexed object and insert object into
* pool's rb tree
*/
void rxe_add_index(void *elem);
/* drop an index and remove object from rb tree */
void rxe_drop_index(void *elem);
/* assign a key to a keyed object and insert object into
* pool's rb tree
*/
void rxe_add_key(void *elem, void *key);
/* remove elem from rb tree */
void rxe_drop_key(void *elem);
/* lookup an indexed object from index. takes a reference on object */
void *rxe_pool_get_index(struct rxe_pool *pool, u32 index);
/* lookup keyed object from key. takes a reference on the object */
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 */
|
