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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause2/*3 * Copyright(c) 2016 Intel Corporation.4 */5 6#include <linux/slab.h>7#include "pd.h"8 9/**10 * rvt_alloc_pd - allocate a protection domain11 * @ibpd: PD12 * @udata: optional user data13 *14 * Allocate and keep track of a PD.15 *16 * Return: 0 on success17 */18int rvt_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)19{20 struct ib_device *ibdev = ibpd->device;21 struct rvt_dev_info *dev = ib_to_rvt(ibdev);22 struct rvt_pd *pd = ibpd_to_rvtpd(ibpd);23 int ret = 0;24 25 /*26 * While we could continue allocating protecetion domains, being27 * constrained only by system resources. The IBTA spec defines that28 * there is a max_pd limit that can be set and we need to check for29 * that.30 */31 32 spin_lock(&dev->n_pds_lock);33 if (dev->n_pds_allocated == dev->dparms.props.max_pd) {34 spin_unlock(&dev->n_pds_lock);35 ret = -ENOMEM;36 goto bail;37 }38 39 dev->n_pds_allocated++;40 spin_unlock(&dev->n_pds_lock);41 42 /* ib_alloc_pd() will initialize pd->ibpd. */43 pd->user = !!udata;44 45bail:46 return ret;47}48 49/**50 * rvt_dealloc_pd - Free PD51 * @ibpd: Free up PD52 * @udata: Valid user data or NULL for kernel object53 *54 * Return: always 055 */56int rvt_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)57{58 struct rvt_dev_info *dev = ib_to_rvt(ibpd->device);59 60 spin_lock(&dev->n_pds_lock);61 dev->n_pds_allocated--;62 spin_unlock(&dev->n_pds_lock);63 return 0;64}65