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