mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
181 lines
5.4 KiB
181 lines
5.4 KiB
/* |
|
* Copyright(c) 2016 - 2019 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 rdma_ah_attr *ah_attr) |
|
{ |
|
int err; |
|
int port_num = rdma_ah_get_port_num(ah_attr); |
|
struct ib_port_attr port_attr; |
|
struct rvt_dev_info *rdi = ib_to_rvt(ibdev); |
|
u8 ah_flags = rdma_ah_get_ah_flags(ah_attr); |
|
u8 static_rate = rdma_ah_get_static_rate(ah_attr); |
|
|
|
err = ib_query_port(ibdev, port_num, &port_attr); |
|
if (err) |
|
return -EINVAL; |
|
if (port_num < 1 || |
|
port_num > ibdev->phys_port_cnt) |
|
return -EINVAL; |
|
if (static_rate != IB_RATE_PORT_CURRENT && |
|
ib_rate_to_mbps(static_rate) < 0) |
|
return -EINVAL; |
|
if ((ah_flags & IB_AH_GRH) && |
|
rdma_ah_read_grh(ah_attr)->sgid_index >= port_attr.gid_tbl_len) |
|
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 |
|
* @ibah: the IB address handle |
|
* @init_attr: the attributes of the AH |
|
* @udata: pointer to user's input output buffer information. |
|
* |
|
* This may be called from interrupt context. |
|
* |
|
* Return: 0 on success |
|
*/ |
|
int rvt_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr, |
|
struct ib_udata *udata) |
|
{ |
|
struct rvt_ah *ah = ibah_to_rvtah(ibah); |
|
struct rvt_dev_info *dev = ib_to_rvt(ibah->device); |
|
unsigned long flags; |
|
|
|
if (rvt_check_ah(ibah->device, init_attr->ah_attr)) |
|
return -EINVAL; |
|
|
|
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); |
|
return -ENOMEM; |
|
} |
|
|
|
dev->n_ahs_allocated++; |
|
spin_unlock_irqrestore(&dev->n_ahs_lock, flags); |
|
|
|
rdma_copy_ah_attr(&ah->attr, init_attr->ah_attr); |
|
|
|
if (dev->driver_f.notify_new_ah) |
|
dev->driver_f.notify_new_ah(ibah->device, |
|
init_attr->ah_attr, ah); |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* rvt_destroy_ah - Destroy an address handle |
|
* @ibah: address handle |
|
* @destroy_flags: destroy address handle flags (see enum rdma_destroy_ah_flags) |
|
* Return: 0 on success |
|
*/ |
|
int rvt_destroy_ah(struct ib_ah *ibah, u32 destroy_flags) |
|
{ |
|
struct rvt_dev_info *dev = ib_to_rvt(ibah->device); |
|
struct rvt_ah *ah = ibah_to_rvtah(ibah); |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&dev->n_ahs_lock, flags); |
|
dev->n_ahs_allocated--; |
|
spin_unlock_irqrestore(&dev->n_ahs_lock, flags); |
|
|
|
rdma_destroy_ah_attr(&ah->attr); |
|
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 rdma_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 rdma_ah_attr *ah_attr) |
|
{ |
|
struct rvt_ah *ah = ibah_to_rvtah(ibah); |
|
|
|
*ah_attr = ah->attr; |
|
|
|
return 0; |
|
}
|
|
|