Commit 8afd32eb authored by Dennis Dalessandro's avatar Dennis Dalessandro Committed by Doug Ledford

IB/rdmavt: Add protection domain to rdmavt.

Add datastructure for and allocation/deallocation of protection domains for
RDMAVT.
Reviewed-by: default avatarIra Weiny <ira.weiny@intel.com>
Reviewed-by: default avatarMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent c1b332bc
......@@ -7,4 +7,5 @@
#
obj-$(CONFIG_INFINIBAND_RDMAVT) += rdmavt.o
rdmavt-y := vt.o dma.o
rdmavt-y := vt.o dma.o pd.o
/*
* Copyright(c) 2015 Intel Corporation.
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* BSD LICENSE
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* - Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <linux/slab.h>
#include "pd.h"
struct ib_pd *rvt_alloc_pd(struct ib_device *ibdev,
struct ib_ucontext *context,
struct ib_udata *udata)
{
struct rvt_dev_info *dev = ib_to_rvt(ibdev);
struct rvt_pd *pd;
struct ib_pd *ret;
pd = kmalloc(sizeof(*pd), GFP_KERNEL);
if (!pd) {
ret = ERR_PTR(-ENOMEM);
goto bail;
}
/*
* 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.max_pds) {
spin_unlock(&dev->n_pds_lock);
kfree(pd);
ret = ERR_PTR(-ENOMEM);
goto bail;
}
dev->n_pds_allocated++;
spin_unlock(&dev->n_pds_lock);
/* ib_alloc_pd() will initialize pd->ibpd. */
pd->user = udata ? 1 : 0;
ret = &pd->ibpd;
bail:
return ret;
}
int rvt_dealloc_pd(struct ib_pd *ibpd)
{
struct rvt_pd *pd = ibpd_to_rvtpd(ibpd);
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);
kfree(pd);
return 0;
}
#ifndef DEF_RDMAVTPD_H
#define DEF_RDMAVTPD_H
/*
* Copyright(c) 2015 Intel Corporation.
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* BSD LICENSE
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* - Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <rdma/rdma_vt.h>
struct ib_pd *rvt_alloc_pd(struct ib_device *ibdev,
struct ib_ucontext *context,
struct ib_udata *udata);
int rvt_dealloc_pd(struct ib_pd *ibpd);
#endif /* DEF_RDMAVTPD_H */
......@@ -76,9 +76,21 @@ int rvt_register_device(struct rvt_dev_info *rdi)
* come up with a better mechanism that simplifies the code at some
* point.
*/
/* DMA Operations */
rdi->ibdev.dma_ops =
rdi->ibdev.dma_ops ? : &rvt_default_dma_mapping_ops;
/* Protection Domain */
rdi->ibdev.alloc_pd =
rdi->ibdev.alloc_pd ? : rvt_alloc_pd;
rdi->ibdev.dealloc_pd =
rdi->ibdev.dealloc_pd ? : rvt_dealloc_pd;
spin_lock_init(&rdi->n_pds_lock);
rdi->n_pds_allocated = 0;
/* We are now good to announce we exist */
return ib_register_device(&rdi->ibdev, rdi->port_callback);
}
EXPORT_SYMBOL(rvt_register_device);
......
......@@ -50,5 +50,6 @@
#include <rdma/rdma_vt.h>
#include "dma.h"
#include "pd.h"
#endif /* DEF_RDMAVT_H */
......@@ -54,16 +54,42 @@
*/
#include "ib_verbs.h"
/*
* Things that are driver specific, module parameters in hfi1 and qib
*/
struct rvt_driver_params {
int max_pds;
};
/* Protection domain */
struct rvt_pd {
struct ib_pd ibpd;
int user; /* non-zero if created from user space */
};
struct rvt_dev_info {
struct ib_device ibdev;
/* Driver specific */
struct rvt_driver_params dparms;
int (*port_callback)(struct ib_device *, u8, struct kobject *);
/*
* TODO:
* need to reflect module parameters that may vary by dev
*/
/* Internal use */
int n_pds_allocated;
spinlock_t n_pds_lock; /* Protect pd allocated count */
};
static inline struct rvt_pd *ibpd_to_rvtpd(struct ib_pd *ibpd)
{
return container_of(ibpd, struct rvt_pd, ibpd);
}
static inline struct rvt_dev_info *ib_to_rvt(struct ib_device *ibdev)
{
return container_of(ibdev, struct rvt_dev_info, ibdev);
}
int rvt_register_device(struct rvt_dev_info *rvd);
void rvt_unregister_device(struct rvt_dev_info *rvd);
......
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