197 lines
5.5 KiB
C
197 lines
5.5 KiB
C
/*
|
|
* Copyright(c) 2016 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 "ah.h"
|
|
#include "vt.h" /* for prints */
|
|
|
|
/**
|
|
* rvt_check_ah - validate the attributes of AH
|
|
* @ibdev: the ib device
|
|
* @ah_attr: the attributes of the AH
|
|
*
|
|
* If driver supports a more detailed check_ah function call back to it
|
|
* otherwise just check the basics.
|
|
*
|
|
* Return: 0 on success
|
|
*/
|
|
int rvt_check_ah(struct ib_device *ibdev,
|
|
struct ib_ah_attr *ah_attr)
|
|
{
|
|
int err;
|
|
struct ib_port_attr port_attr;
|
|
struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
|
|
enum rdma_link_layer link = rdma_port_get_link_layer(ibdev,
|
|
ah_attr->port_num);
|
|
|
|
err = ib_query_port(ibdev, ah_attr->port_num, &port_attr);
|
|
if (err)
|
|
return -EINVAL;
|
|
if (ah_attr->port_num < 1 ||
|
|
ah_attr->port_num > ibdev->phys_port_cnt)
|
|
return -EINVAL;
|
|
if (ah_attr->static_rate != IB_RATE_PORT_CURRENT &&
|
|
ib_rate_to_mbps(ah_attr->static_rate) < 0)
|
|
return -EINVAL;
|
|
if ((ah_attr->ah_flags & IB_AH_GRH) &&
|
|
ah_attr->grh.sgid_index >= port_attr.gid_tbl_len)
|
|
return -EINVAL;
|
|
if (link != IB_LINK_LAYER_ETHERNET) {
|
|
if (ah_attr->dlid == 0)
|
|
return -EINVAL;
|
|
if (ah_attr->dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE) &&
|
|
ah_attr->dlid != be16_to_cpu(IB_LID_PERMISSIVE) &&
|
|
!(ah_attr->ah_flags & IB_AH_GRH))
|
|
return -EINVAL;
|
|
}
|
|
if (rdi->driver_f.check_ah)
|
|
return rdi->driver_f.check_ah(ibdev, ah_attr);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(rvt_check_ah);
|
|
|
|
/**
|
|
* rvt_create_ah - create an address handle
|
|
* @pd: the protection domain
|
|
* @ah_attr: the attributes of the AH
|
|
*
|
|
* This may be called from interrupt context.
|
|
*
|
|
* Return: newly allocated ah
|
|
*/
|
|
struct ib_ah *rvt_create_ah(struct ib_pd *pd,
|
|
struct ib_ah_attr *ah_attr)
|
|
{
|
|
struct rvt_ah *ah;
|
|
struct rvt_dev_info *dev = ib_to_rvt(pd->device);
|
|
unsigned long flags;
|
|
|
|
if (rvt_check_ah(pd->device, ah_attr))
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
ah = kmalloc(sizeof(*ah), GFP_ATOMIC);
|
|
if (!ah)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
spin_lock_irqsave(&dev->n_ahs_lock, flags);
|
|
if (dev->n_ahs_allocated == dev->dparms.props.max_ah) {
|
|
spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
|
|
kfree(ah);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
dev->n_ahs_allocated++;
|
|
spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
|
|
|
|
ah->attr = *ah_attr;
|
|
atomic_set(&ah->refcount, 0);
|
|
|
|
if (dev->driver_f.notify_new_ah)
|
|
dev->driver_f.notify_new_ah(pd->device, ah_attr, ah);
|
|
|
|
return &ah->ibah;
|
|
}
|
|
|
|
/**
|
|
* rvt_destory_ah - Destory an address handle
|
|
* @ibah: address handle
|
|
*
|
|
* Return: 0 on success
|
|
*/
|
|
int rvt_destroy_ah(struct ib_ah *ibah)
|
|
{
|
|
struct rvt_dev_info *dev = ib_to_rvt(ibah->device);
|
|
struct rvt_ah *ah = ibah_to_rvtah(ibah);
|
|
unsigned long flags;
|
|
|
|
if (atomic_read(&ah->refcount) != 0)
|
|
return -EBUSY;
|
|
|
|
spin_lock_irqsave(&dev->n_ahs_lock, flags);
|
|
dev->n_ahs_allocated--;
|
|
spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
|
|
|
|
kfree(ah);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* rvt_modify_ah - modify an ah with given attrs
|
|
* @ibah: address handle to modify
|
|
* @ah_attr: attrs to apply
|
|
*
|
|
* Return: 0 on success
|
|
*/
|
|
int rvt_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
|
|
{
|
|
struct rvt_ah *ah = ibah_to_rvtah(ibah);
|
|
|
|
if (rvt_check_ah(ibah->device, ah_attr))
|
|
return -EINVAL;
|
|
|
|
ah->attr = *ah_attr;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* rvt_query_ah - return attrs for ah
|
|
* @ibah: address handle to query
|
|
* @ah_attr: return info in this
|
|
*
|
|
* Return: always 0
|
|
*/
|
|
int rvt_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
|
|
{
|
|
struct rvt_ah *ah = ibah_to_rvtah(ibah);
|
|
|
|
*ah_attr = ah->attr;
|
|
|
|
return 0;
|
|
}
|