14c1e4972SDennis Dalessandro /* 2fe314195SDennis Dalessandro * Copyright(c) 2016 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 924c1e4972SDennis Dalessandro * @pd: the protection domain 934c1e4972SDennis Dalessandro * @ah_attr: the attributes of the AH 94b090c4e3SGal Pressman * @create_flags: create address handle flags (see enum rdma_create_ah_flags) 954f32fb92SKamal Heib * @udata: pointer to user's input output buffer information. 964c1e4972SDennis Dalessandro * 974c1e4972SDennis Dalessandro * This may be called from interrupt context. 9890793f71SDennis Dalessandro * 9990793f71SDennis Dalessandro * Return: newly allocated ah 1004c1e4972SDennis Dalessandro */ 1014c1e4972SDennis Dalessandro struct ib_ah *rvt_create_ah(struct ib_pd *pd, 1024f32fb92SKamal Heib struct rdma_ah_attr *ah_attr, 103b090c4e3SGal Pressman u32 create_flags, 1044f32fb92SKamal Heib struct ib_udata *udata) 1054c1e4972SDennis Dalessandro { 106119a8e70SKamal Heib struct rvt_ah *ah; 107119a8e70SKamal Heib struct rvt_dev_info *dev = ib_to_rvt(pd->device); 108119a8e70SKamal Heib unsigned long flags; 109119a8e70SKamal Heib 110119a8e70SKamal Heib if (rvt_check_ah(pd->device, ah_attr)) 111119a8e70SKamal Heib return ERR_PTR(-EINVAL); 112119a8e70SKamal Heib 113119a8e70SKamal Heib ah = kmalloc(sizeof(*ah), GFP_ATOMIC); 114119a8e70SKamal Heib if (!ah) 115119a8e70SKamal Heib return ERR_PTR(-ENOMEM); 116119a8e70SKamal Heib 117119a8e70SKamal Heib spin_lock_irqsave(&dev->n_ahs_lock, flags); 118119a8e70SKamal Heib if (dev->n_ahs_allocated == dev->dparms.props.max_ah) { 119f0bb2d44SDan Carpenter spin_unlock_irqrestore(&dev->n_ahs_lock, flags); 120119a8e70SKamal Heib kfree(ah); 121119a8e70SKamal Heib return ERR_PTR(-ENOMEM); 122119a8e70SKamal Heib } 123119a8e70SKamal Heib 124119a8e70SKamal Heib dev->n_ahs_allocated++; 125119a8e70SKamal Heib spin_unlock_irqrestore(&dev->n_ahs_lock, flags); 126119a8e70SKamal Heib 127d97099feSJason Gunthorpe rdma_copy_ah_attr(&ah->attr, ah_attr); 128d97099feSJason Gunthorpe 129119a8e70SKamal Heib atomic_set(&ah->refcount, 0); 130119a8e70SKamal Heib 131b036db83SDennis Dalessandro if (dev->driver_f.notify_new_ah) 132b036db83SDennis Dalessandro dev->driver_f.notify_new_ah(pd->device, ah_attr, ah); 133b036db83SDennis Dalessandro 134119a8e70SKamal Heib return &ah->ibah; 1354c1e4972SDennis Dalessandro } 1364c1e4972SDennis Dalessandro 13790793f71SDennis Dalessandro /** 13890793f71SDennis Dalessandro * rvt_destory_ah - Destory an address handle 13990793f71SDennis Dalessandro * @ibah: address handle 14090793f71SDennis Dalessandro * 14190793f71SDennis Dalessandro * Return: 0 on success 14290793f71SDennis Dalessandro */ 1434c1e4972SDennis Dalessandro int rvt_destroy_ah(struct ib_ah *ibah) 1444c1e4972SDennis Dalessandro { 145119a8e70SKamal Heib struct rvt_dev_info *dev = ib_to_rvt(ibah->device); 146119a8e70SKamal Heib struct rvt_ah *ah = ibah_to_rvtah(ibah); 147119a8e70SKamal Heib unsigned long flags; 148119a8e70SKamal Heib 149119a8e70SKamal Heib if (atomic_read(&ah->refcount) != 0) 150119a8e70SKamal Heib return -EBUSY; 151119a8e70SKamal Heib 152119a8e70SKamal Heib spin_lock_irqsave(&dev->n_ahs_lock, flags); 153119a8e70SKamal Heib dev->n_ahs_allocated--; 154119a8e70SKamal Heib spin_unlock_irqrestore(&dev->n_ahs_lock, flags); 155119a8e70SKamal Heib 156d97099feSJason Gunthorpe rdma_destroy_ah_attr(&ah->attr); 157119a8e70SKamal Heib kfree(ah); 158119a8e70SKamal Heib 159119a8e70SKamal Heib return 0; 1604c1e4972SDennis Dalessandro } 1614c1e4972SDennis Dalessandro 16290793f71SDennis Dalessandro /** 16390793f71SDennis Dalessandro * rvt_modify_ah - modify an ah with given attrs 16490793f71SDennis Dalessandro * @ibah: address handle to modify 16590793f71SDennis Dalessandro * @ah_attr: attrs to apply 16690793f71SDennis Dalessandro * 16790793f71SDennis Dalessandro * Return: 0 on success 16890793f71SDennis Dalessandro */ 16990898850SDasaratharaman Chandramouli int rvt_modify_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr) 1704c1e4972SDennis Dalessandro { 171119a8e70SKamal Heib struct rvt_ah *ah = ibah_to_rvtah(ibah); 172119a8e70SKamal Heib 173119a8e70SKamal Heib if (rvt_check_ah(ibah->device, ah_attr)) 174119a8e70SKamal Heib return -EINVAL; 175119a8e70SKamal Heib 176119a8e70SKamal Heib ah->attr = *ah_attr; 177119a8e70SKamal Heib 178119a8e70SKamal Heib return 0; 1794c1e4972SDennis Dalessandro } 1804c1e4972SDennis Dalessandro 18190793f71SDennis Dalessandro /** 18290793f71SDennis Dalessandro * rvt_query_ah - return attrs for ah 18390793f71SDennis Dalessandro * @ibah: address handle to query 18490793f71SDennis Dalessandro * @ah_attr: return info in this 18590793f71SDennis Dalessandro * 18690793f71SDennis Dalessandro * Return: always 0 18790793f71SDennis Dalessandro */ 18890898850SDasaratharaman Chandramouli int rvt_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr) 1894c1e4972SDennis Dalessandro { 190119a8e70SKamal Heib struct rvt_ah *ah = ibah_to_rvtah(ibah); 191119a8e70SKamal Heib 192119a8e70SKamal Heib *ah_attr = ah->attr; 193119a8e70SKamal Heib 194119a8e70SKamal Heib return 0; 1954c1e4972SDennis Dalessandro } 196