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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
// 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.
*/
#include "rxe.h"
#include "rxe_loc.h"
/* caller should hold mc_grp_pool->pool_lock */
static struct rxe_mc_grp *create_grp(struct rxe_dev *rxe,
struct rxe_pool *pool,
union ib_gid *mgid)
{
int err;
struct rxe_mc_grp *grp;
grp = rxe_alloc_locked(&rxe->mc_grp_pool);
if (!grp)
return ERR_PTR(-ENOMEM);
INIT_LIST_HEAD(&grp->qp_list);
spin_lock_init(&grp->mcg_lock);
grp->rxe = rxe;
rxe_add_key_locked(grp, mgid);
err = rxe_mcast_add(rxe, mgid);
if (unlikely(err)) {
rxe_drop_key_locked(grp);
rxe_drop_ref(grp);
return ERR_PTR(err);
}
return grp;
}
int rxe_mcast_get_grp(struct rxe_dev *rxe, union ib_gid *mgid,
struct rxe_mc_grp **grp_p)
{
int err;
struct rxe_mc_grp *grp;
struct rxe_pool *pool = &rxe->mc_grp_pool;
unsigned long flags;
if (rxe->attr.max_mcast_qp_attach == 0)
return -EINVAL;
write_lock_irqsave(&pool->pool_lock, flags);
grp = rxe_pool_get_key_locked(pool, mgid);
if (grp)
goto done;
grp = create_grp(rxe, pool, mgid);
if (IS_ERR(grp)) {
write_unlock_irqrestore(&pool->pool_lock, flags);
err = PTR_ERR(grp);
return err;
}
done:
write_unlock_irqrestore(&pool->pool_lock, flags);
*grp_p = grp;
return 0;
}
int rxe_mcast_add_grp_elem(struct rxe_dev *rxe, struct rxe_qp *qp,
struct rxe_mc_grp *grp)
{
int err;
struct rxe_mc_elem *elem;
/* check to see of the qp is already a member of the group */
spin_lock_bh(&qp->grp_lock);
spin_lock_bh(&grp->mcg_lock);
list_for_each_entry(elem, &grp->qp_list, qp_list) {
if (elem->qp == qp) {
err = 0;
goto out;
}
}
if (grp->num_qp >= rxe->attr.max_mcast_qp_attach) {
err = -ENOMEM;
goto out;
}
elem = rxe_alloc_locked(&rxe->mc_elem_pool);
if (!elem) {
err = -ENOMEM;
goto out;
}
/* each qp holds a ref on the grp */
rxe_add_ref(grp);
grp->num_qp++;
elem->qp = qp;
elem->grp = grp;
list_add(&elem->qp_list, &grp->qp_list);
list_add(&elem->grp_list, &qp->grp_list);
err = 0;
out:
spin_unlock_bh(&grp->mcg_lock);
spin_unlock_bh(&qp->grp_lock);
return err;
}
int rxe_mcast_drop_grp_elem(struct rxe_dev *rxe, struct rxe_qp *qp,
union ib_gid *mgid)
{
struct rxe_mc_grp *grp;
struct rxe_mc_elem *elem, *tmp;
grp = rxe_pool_get_key(&rxe->mc_grp_pool, mgid);
if (!grp)
goto err1;
spin_lock_bh(&qp->grp_lock);
spin_lock_bh(&grp->mcg_lock);
list_for_each_entry_safe(elem, tmp, &grp->qp_list, qp_list) {
if (elem->qp == qp) {
list_del(&elem->qp_list);
list_del(&elem->grp_list);
grp->num_qp--;
spin_unlock_bh(&grp->mcg_lock);
spin_unlock_bh(&qp->grp_lock);
rxe_drop_ref(elem);
rxe_drop_ref(grp); /* ref held by QP */
rxe_drop_ref(grp); /* ref from get_key */
return 0;
}
}
spin_unlock_bh(&grp->mcg_lock);
spin_unlock_bh(&qp->grp_lock);
rxe_drop_ref(grp); /* ref from get_key */
err1:
return -EINVAL;
}
void rxe_drop_all_mcast_groups(struct rxe_qp *qp)
{
struct rxe_mc_grp *grp;
struct rxe_mc_elem *elem;
while (1) {
spin_lock_bh(&qp->grp_lock);
if (list_empty(&qp->grp_list)) {
spin_unlock_bh(&qp->grp_lock);
break;
}
elem = list_first_entry(&qp->grp_list, struct rxe_mc_elem,
grp_list);
list_del(&elem->grp_list);
spin_unlock_bh(&qp->grp_lock);
grp = elem->grp;
spin_lock_bh(&grp->mcg_lock);
list_del(&elem->qp_list);
grp->num_qp--;
spin_unlock_bh(&grp->mcg_lock);
rxe_drop_ref(grp);
rxe_drop_ref(elem);
}
}
void rxe_mc_cleanup(struct rxe_pool_entry *arg)
{
struct rxe_mc_grp *grp = container_of(arg, typeof(*grp), pelem);
struct rxe_dev *rxe = grp->rxe;
rxe_drop_key(grp);
rxe_mcast_delete(rxe, &grp->mgid);
}
|
