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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/infiniband/sw/rdmavt/pd.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/infiniband/sw/rdmavt/pd.c')
-rw-r--r-- | drivers/infiniband/sw/rdmavt/pd.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/drivers/infiniband/sw/rdmavt/pd.c b/drivers/infiniband/sw/rdmavt/pd.c new file mode 100644 index 000000000..ae6207196 --- /dev/null +++ b/drivers/infiniband/sw/rdmavt/pd.c @@ -0,0 +1,64 @@ +// 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; +} |