1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2016 HGST, a Western Digital Company.
5 #include <rdma/ib_verbs.h>
6 #include <rdma/mr_pool.h>
8 struct ib_mr *ib_mr_pool_get(struct ib_qp *qp, struct list_head *list)
13 spin_lock_irqsave(&qp->mr_lock, flags);
14 mr = list_first_entry_or_null(list, struct ib_mr, qp_entry);
16 list_del(&mr->qp_entry);
19 spin_unlock_irqrestore(&qp->mr_lock, flags);
23 EXPORT_SYMBOL(ib_mr_pool_get);
25 void ib_mr_pool_put(struct ib_qp *qp, struct list_head *list, struct ib_mr *mr)
29 spin_lock_irqsave(&qp->mr_lock, flags);
30 list_add(&mr->qp_entry, list);
32 spin_unlock_irqrestore(&qp->mr_lock, flags);
34 EXPORT_SYMBOL(ib_mr_pool_put);
36 int ib_mr_pool_init(struct ib_qp *qp, struct list_head *list, int nr,
37 enum ib_mr_type type, u32 max_num_sg, u32 max_num_meta_sg)
43 for (i = 0; i < nr; i++) {
44 if (type == IB_MR_TYPE_INTEGRITY)
45 mr = ib_alloc_mr_integrity(qp->pd, max_num_sg,
48 mr = ib_alloc_mr(qp->pd, type, max_num_sg);
54 spin_lock_irqsave(&qp->mr_lock, flags);
55 list_add_tail(&mr->qp_entry, list);
56 spin_unlock_irqrestore(&qp->mr_lock, flags);
61 ib_mr_pool_destroy(qp, list);
64 EXPORT_SYMBOL(ib_mr_pool_init);
66 void ib_mr_pool_destroy(struct ib_qp *qp, struct list_head *list)
71 spin_lock_irqsave(&qp->mr_lock, flags);
72 while (!list_empty(list)) {
73 mr = list_first_entry(list, struct ib_mr, qp_entry);
74 list_del(&mr->qp_entry);
76 spin_unlock_irqrestore(&qp->mr_lock, flags);
78 spin_lock_irqsave(&qp->mr_lock, flags);
80 spin_unlock_irqrestore(&qp->mr_lock, flags);
82 EXPORT_SYMBOL(ib_mr_pool_destroy);