2 * Copyright (c) 2016 HGST, a Western Digital Company.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 #include <rdma/ib_verbs.h>
14 #include <rdma/mr_pool.h>
16 struct ib_mr *ib_mr_pool_get(struct ib_qp *qp, struct list_head *list)
21 spin_lock_irqsave(&qp->mr_lock, flags);
22 mr = list_first_entry_or_null(list, struct ib_mr, qp_entry);
24 list_del(&mr->qp_entry);
27 spin_unlock_irqrestore(&qp->mr_lock, flags);
31 EXPORT_SYMBOL(ib_mr_pool_get);
33 void ib_mr_pool_put(struct ib_qp *qp, struct list_head *list, struct ib_mr *mr)
37 spin_lock_irqsave(&qp->mr_lock, flags);
38 list_add(&mr->qp_entry, list);
40 spin_unlock_irqrestore(&qp->mr_lock, flags);
42 EXPORT_SYMBOL(ib_mr_pool_put);
44 int ib_mr_pool_init(struct ib_qp *qp, struct list_head *list, int nr,
45 enum ib_mr_type type, u32 max_num_sg)
51 for (i = 0; i < nr; i++) {
52 mr = ib_alloc_mr(qp->pd, type, max_num_sg);
58 spin_lock_irqsave(&qp->mr_lock, flags);
59 list_add_tail(&mr->qp_entry, list);
60 spin_unlock_irqrestore(&qp->mr_lock, flags);
65 ib_mr_pool_destroy(qp, list);
68 EXPORT_SYMBOL(ib_mr_pool_init);
70 void ib_mr_pool_destroy(struct ib_qp *qp, struct list_head *list)
75 spin_lock_irqsave(&qp->mr_lock, flags);
76 while (!list_empty(list)) {
77 mr = list_first_entry(list, struct ib_mr, qp_entry);
78 list_del(&mr->qp_entry);
80 spin_unlock_irqrestore(&qp->mr_lock, flags);
82 spin_lock_irqsave(&qp->mr_lock, flags);
84 spin_unlock_irqrestore(&qp->mr_lock, flags);
86 EXPORT_SYMBOL(ib_mr_pool_destroy);