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64 lines
1.4 KiB
64 lines
1.4 KiB
// 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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