86 lines
2.1 KiB
C
86 lines
2.1 KiB
C
/*
|
|
* Copyright (c) 2016 HGST, a Western Digital Company.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*/
|
|
#include <rdma/ib_verbs.h>
|
|
#include <rdma/mr_pool.h>
|
|
|
|
struct ib_mr *ib_mr_pool_get(struct ib_qp *qp, struct list_head *list)
|
|
{
|
|
struct ib_mr *mr;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&qp->mr_lock, flags);
|
|
mr = list_first_entry_or_null(list, struct ib_mr, qp_entry);
|
|
if (mr) {
|
|
list_del(&mr->qp_entry);
|
|
qp->mrs_used++;
|
|
}
|
|
spin_unlock_irqrestore(&qp->mr_lock, flags);
|
|
|
|
return mr;
|
|
}
|
|
EXPORT_SYMBOL(ib_mr_pool_get);
|
|
|
|
void ib_mr_pool_put(struct ib_qp *qp, struct list_head *list, struct ib_mr *mr)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&qp->mr_lock, flags);
|
|
list_add(&mr->qp_entry, list);
|
|
qp->mrs_used--;
|
|
spin_unlock_irqrestore(&qp->mr_lock, flags);
|
|
}
|
|
EXPORT_SYMBOL(ib_mr_pool_put);
|
|
|
|
int ib_mr_pool_init(struct ib_qp *qp, struct list_head *list, int nr,
|
|
enum ib_mr_type type, u32 max_num_sg)
|
|
{
|
|
struct ib_mr *mr;
|
|
unsigned long flags;
|
|
int ret, i;
|
|
|
|
for (i = 0; i < nr; i++) {
|
|
mr = ib_alloc_mr(qp->pd, type, max_num_sg);
|
|
if (IS_ERR(mr)) {
|
|
ret = PTR_ERR(mr);
|
|
goto out;
|
|
}
|
|
|
|
spin_lock_irqsave(&qp->mr_lock, flags);
|
|
list_add_tail(&mr->qp_entry, list);
|
|
spin_unlock_irqrestore(&qp->mr_lock, flags);
|
|
}
|
|
|
|
return 0;
|
|
out:
|
|
ib_mr_pool_destroy(qp, list);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_mr_pool_init);
|
|
|
|
void ib_mr_pool_destroy(struct ib_qp *qp, struct list_head *list)
|
|
{
|
|
struct ib_mr *mr;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&qp->mr_lock, flags);
|
|
while (!list_empty(list)) {
|
|
mr = list_first_entry(list, struct ib_mr, qp_entry);
|
|
list_del(&mr->qp_entry);
|
|
|
|
spin_unlock_irqrestore(&qp->mr_lock, flags);
|
|
ib_dereg_mr(mr);
|
|
spin_lock_irqsave(&qp->mr_lock, flags);
|
|
}
|
|
spin_unlock_irqrestore(&qp->mr_lock, flags);
|
|
}
|
|
EXPORT_SYMBOL(ib_mr_pool_destroy);
|