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106 lines
3.4 KiB
106 lines
3.4 KiB
/* |
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* Copyright(c) 2016 Intel Corporation. |
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* |
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* This file is provided under a dual BSD/GPLv2 license. When using or |
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* redistributing this file, you may do so under either license. |
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* |
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* GPL LICENSE SUMMARY |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of version 2 of the GNU General Public License as |
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* published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* General Public License for more details. |
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* |
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* BSD LICENSE |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* - Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* - Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* - Neither the name of Intel Corporation nor the names of its |
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* contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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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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