65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
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// SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause
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/*
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* Copyright(c) 2016 Intel Corporation.
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*/
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#include <linux/slab.h>
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#include "pd.h"
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/**
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* rvt_alloc_pd - allocate a protection domain
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* @ibpd: PD
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* @udata: optional user data
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*
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* Allocate and keep track of a PD.
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*
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* Return: 0 on success
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*/
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int rvt_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
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{
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struct ib_device *ibdev = ibpd->device;
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struct rvt_dev_info *dev = ib_to_rvt(ibdev);
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struct rvt_pd *pd = ibpd_to_rvtpd(ibpd);
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int ret = 0;
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/*
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* While we could continue allocating protecetion domains, being
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* constrained only by system resources. The IBTA spec defines that
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* there is a max_pd limit that can be set and we need to check for
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* that.
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*/
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spin_lock(&dev->n_pds_lock);
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if (dev->n_pds_allocated == dev->dparms.props.max_pd) {
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spin_unlock(&dev->n_pds_lock);
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ret = -ENOMEM;
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goto bail;
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}
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dev->n_pds_allocated++;
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spin_unlock(&dev->n_pds_lock);
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/* ib_alloc_pd() will initialize pd->ibpd. */
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pd->user = !!udata;
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bail:
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return ret;
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}
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/**
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* rvt_dealloc_pd - Free PD
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* @ibpd: Free up PD
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* @udata: Valid user data or NULL for kernel object
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*
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* Return: always 0
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*/
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int rvt_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
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{
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struct rvt_dev_info *dev = ib_to_rvt(ibpd->device);
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spin_lock(&dev->n_pds_lock);
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dev->n_pds_allocated--;
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spin_unlock(&dev->n_pds_lock);
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return 0;
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}
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