14c1e4972SDennis Dalessandro /* 2d310c4bfSMichael J. Ruhl * Copyright(c) 2016 - 2019 Intel Corporation. 34c1e4972SDennis Dalessandro * 44c1e4972SDennis Dalessandro * This file is provided under a dual BSD/GPLv2 license. When using or 54c1e4972SDennis Dalessandro * redistributing this file, you may do so under either license. 64c1e4972SDennis Dalessandro * 74c1e4972SDennis Dalessandro * GPL LICENSE SUMMARY 84c1e4972SDennis Dalessandro * 94c1e4972SDennis Dalessandro * This program is free software; you can redistribute it and/or modify 104c1e4972SDennis Dalessandro * it under the terms of version 2 of the GNU General Public License as 114c1e4972SDennis Dalessandro * published by the Free Software Foundation. 124c1e4972SDennis Dalessandro * 134c1e4972SDennis Dalessandro * This program is distributed in the hope that it will be useful, but 144c1e4972SDennis Dalessandro * WITHOUT ANY WARRANTY; without even the implied warranty of 154c1e4972SDennis Dalessandro * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 164c1e4972SDennis Dalessandro * General Public License for more details. 174c1e4972SDennis Dalessandro * 184c1e4972SDennis Dalessandro * BSD LICENSE 194c1e4972SDennis Dalessandro * 204c1e4972SDennis Dalessandro * Redistribution and use in source and binary forms, with or without 214c1e4972SDennis Dalessandro * modification, are permitted provided that the following conditions 224c1e4972SDennis Dalessandro * are met: 234c1e4972SDennis Dalessandro * 244c1e4972SDennis Dalessandro * - Redistributions of source code must retain the above copyright 254c1e4972SDennis Dalessandro * notice, this list of conditions and the following disclaimer. 264c1e4972SDennis Dalessandro * - Redistributions in binary form must reproduce the above copyright 274c1e4972SDennis Dalessandro * notice, this list of conditions and the following disclaimer in 284c1e4972SDennis Dalessandro * the documentation and/or other materials provided with the 294c1e4972SDennis Dalessandro * distribution. 304c1e4972SDennis Dalessandro * - Neither the name of Intel Corporation nor the names of its 314c1e4972SDennis Dalessandro * contributors may be used to endorse or promote products derived 324c1e4972SDennis Dalessandro * from this software without specific prior written permission. 334c1e4972SDennis Dalessandro * 344c1e4972SDennis Dalessandro * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 354c1e4972SDennis Dalessandro * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 364c1e4972SDennis Dalessandro * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 374c1e4972SDennis Dalessandro * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 384c1e4972SDennis Dalessandro * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 394c1e4972SDennis Dalessandro * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 404c1e4972SDennis Dalessandro * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 414c1e4972SDennis Dalessandro * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 424c1e4972SDennis Dalessandro * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 434c1e4972SDennis Dalessandro * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 444c1e4972SDennis Dalessandro * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 454c1e4972SDennis Dalessandro * 464c1e4972SDennis Dalessandro */ 474c1e4972SDennis Dalessandro 48119a8e70SKamal Heib #include <linux/slab.h> 494c1e4972SDennis Dalessandro #include "ah.h" 50119a8e70SKamal Heib #include "vt.h" /* for prints */ 51119a8e70SKamal Heib 52119a8e70SKamal Heib /** 53119a8e70SKamal Heib * rvt_check_ah - validate the attributes of AH 54119a8e70SKamal Heib * @ibdev: the ib device 55119a8e70SKamal Heib * @ah_attr: the attributes of the AH 5690793f71SDennis Dalessandro * 5790793f71SDennis Dalessandro * If driver supports a more detailed check_ah function call back to it 5890793f71SDennis Dalessandro * otherwise just check the basics. 5990793f71SDennis Dalessandro * 6090793f71SDennis Dalessandro * Return: 0 on success 61119a8e70SKamal Heib */ 62119a8e70SKamal Heib int rvt_check_ah(struct ib_device *ibdev, 6390898850SDasaratharaman Chandramouli struct rdma_ah_attr *ah_attr) 64119a8e70SKamal Heib { 65119a8e70SKamal Heib int err; 66d8966fcdSDasaratharaman Chandramouli int port_num = rdma_ah_get_port_num(ah_attr); 67119a8e70SKamal Heib struct ib_port_attr port_attr; 68119a8e70SKamal Heib struct rvt_dev_info *rdi = ib_to_rvt(ibdev); 69d8966fcdSDasaratharaman Chandramouli u8 ah_flags = rdma_ah_get_ah_flags(ah_attr); 70d8966fcdSDasaratharaman Chandramouli u8 static_rate = rdma_ah_get_static_rate(ah_attr); 71119a8e70SKamal Heib 72d8966fcdSDasaratharaman Chandramouli err = ib_query_port(ibdev, port_num, &port_attr); 73119a8e70SKamal Heib if (err) 74119a8e70SKamal Heib return -EINVAL; 75d8966fcdSDasaratharaman Chandramouli if (port_num < 1 || 76d8966fcdSDasaratharaman Chandramouli port_num > ibdev->phys_port_cnt) 77119a8e70SKamal Heib return -EINVAL; 78d8966fcdSDasaratharaman Chandramouli if (static_rate != IB_RATE_PORT_CURRENT && 79d8966fcdSDasaratharaman Chandramouli ib_rate_to_mbps(static_rate) < 0) 80119a8e70SKamal Heib return -EINVAL; 81d8966fcdSDasaratharaman Chandramouli if ((ah_flags & IB_AH_GRH) && 82d8966fcdSDasaratharaman Chandramouli rdma_ah_read_grh(ah_attr)->sgid_index >= port_attr.gid_tbl_len) 83119a8e70SKamal Heib return -EINVAL; 84b036db83SDennis Dalessandro if (rdi->driver_f.check_ah) 85b036db83SDennis Dalessandro return rdi->driver_f.check_ah(ibdev, ah_attr); 86119a8e70SKamal Heib return 0; 87119a8e70SKamal Heib } 88119a8e70SKamal Heib EXPORT_SYMBOL(rvt_check_ah); 894c1e4972SDennis Dalessandro 904c1e4972SDennis Dalessandro /** 914c1e4972SDennis Dalessandro * rvt_create_ah - create an address handle 92d3456914SLeon Romanovsky * @ibah: the IB address handle 9311708142SColton Lewis * @init_attr: the attributes of the AH 944f32fb92SKamal Heib * @udata: pointer to user's input output buffer information. 954c1e4972SDennis Dalessandro * 964c1e4972SDennis Dalessandro * This may be called from interrupt context. 9790793f71SDennis Dalessandro * 98d3456914SLeon Romanovsky * Return: 0 on success 994c1e4972SDennis Dalessandro */ 100fa5d010cSMaor Gottlieb int rvt_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr, 101fa5d010cSMaor Gottlieb struct ib_udata *udata) 1024c1e4972SDennis Dalessandro { 103d3456914SLeon Romanovsky struct rvt_ah *ah = ibah_to_rvtah(ibah); 104d3456914SLeon Romanovsky struct rvt_dev_info *dev = ib_to_rvt(ibah->device); 105119a8e70SKamal Heib unsigned long flags; 106119a8e70SKamal Heib 107fa5d010cSMaor Gottlieb if (rvt_check_ah(ibah->device, init_attr->ah_attr)) 108d3456914SLeon Romanovsky return -EINVAL; 109119a8e70SKamal Heib 110119a8e70SKamal Heib spin_lock_irqsave(&dev->n_ahs_lock, flags); 111119a8e70SKamal Heib if (dev->n_ahs_allocated == dev->dparms.props.max_ah) { 112f0bb2d44SDan Carpenter spin_unlock_irqrestore(&dev->n_ahs_lock, flags); 113d3456914SLeon Romanovsky return -ENOMEM; 114119a8e70SKamal Heib } 115119a8e70SKamal Heib 116119a8e70SKamal Heib dev->n_ahs_allocated++; 117119a8e70SKamal Heib spin_unlock_irqrestore(&dev->n_ahs_lock, flags); 118119a8e70SKamal Heib 119fa5d010cSMaor Gottlieb rdma_copy_ah_attr(&ah->attr, init_attr->ah_attr); 120d97099feSJason Gunthorpe 121b036db83SDennis Dalessandro if (dev->driver_f.notify_new_ah) 122fa5d010cSMaor Gottlieb dev->driver_f.notify_new_ah(ibah->device, 123fa5d010cSMaor Gottlieb init_attr->ah_attr, ah); 124b036db83SDennis Dalessandro 125d3456914SLeon Romanovsky return 0; 1264c1e4972SDennis Dalessandro } 1274c1e4972SDennis Dalessandro 12890793f71SDennis Dalessandro /** 12990793f71SDennis Dalessandro * rvt_destory_ah - Destory an address handle 13090793f71SDennis Dalessandro * @ibah: address handle 1312553ba21SGal Pressman * @destroy_flags: destroy address handle flags (see enum rdma_destroy_ah_flags) 13290793f71SDennis Dalessandro * 13390793f71SDennis Dalessandro * Return: 0 on success 13490793f71SDennis Dalessandro */ 1359a9ebf8cSLeon Romanovsky int rvt_destroy_ah(struct ib_ah *ibah, u32 destroy_flags) 1364c1e4972SDennis Dalessandro { 137119a8e70SKamal Heib struct rvt_dev_info *dev = ib_to_rvt(ibah->device); 138119a8e70SKamal Heib struct rvt_ah *ah = ibah_to_rvtah(ibah); 139119a8e70SKamal Heib unsigned long flags; 140119a8e70SKamal Heib 141119a8e70SKamal Heib spin_lock_irqsave(&dev->n_ahs_lock, flags); 142119a8e70SKamal Heib dev->n_ahs_allocated--; 143119a8e70SKamal Heib spin_unlock_irqrestore(&dev->n_ahs_lock, flags); 144119a8e70SKamal Heib 145d97099feSJason Gunthorpe rdma_destroy_ah_attr(&ah->attr); 1469a9ebf8cSLeon Romanovsky return 0; 1474c1e4972SDennis Dalessandro } 1484c1e4972SDennis Dalessandro 14990793f71SDennis Dalessandro /** 15090793f71SDennis Dalessandro * rvt_modify_ah - modify an ah with given attrs 15190793f71SDennis Dalessandro * @ibah: address handle to modify 15290793f71SDennis Dalessandro * @ah_attr: attrs to apply 15390793f71SDennis Dalessandro * 15490793f71SDennis Dalessandro * Return: 0 on success 15590793f71SDennis Dalessandro */ 15690898850SDasaratharaman Chandramouli int rvt_modify_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr) 1574c1e4972SDennis Dalessandro { 158119a8e70SKamal Heib struct rvt_ah *ah = ibah_to_rvtah(ibah); 159119a8e70SKamal Heib 160119a8e70SKamal Heib if (rvt_check_ah(ibah->device, ah_attr)) 161119a8e70SKamal Heib return -EINVAL; 162119a8e70SKamal Heib 163119a8e70SKamal Heib ah->attr = *ah_attr; 164119a8e70SKamal Heib 165119a8e70SKamal Heib return 0; 1664c1e4972SDennis Dalessandro } 1674c1e4972SDennis Dalessandro 16890793f71SDennis Dalessandro /** 16990793f71SDennis Dalessandro * rvt_query_ah - return attrs for ah 17090793f71SDennis Dalessandro * @ibah: address handle to query 17190793f71SDennis Dalessandro * @ah_attr: return info in this 17290793f71SDennis Dalessandro * 17390793f71SDennis Dalessandro * Return: always 0 17490793f71SDennis Dalessandro */ 17590898850SDasaratharaman Chandramouli int rvt_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr) 1764c1e4972SDennis Dalessandro { 177119a8e70SKamal Heib struct rvt_ah *ah = ibah_to_rvtah(ibah); 178119a8e70SKamal Heib 179119a8e70SKamal Heib *ah_attr = ah->attr; 180119a8e70SKamal Heib 181119a8e70SKamal Heib return 0; 1824c1e4972SDennis Dalessandro } 183