1/* 2 * Copyright(c) 2016 Intel Corporation. 3 * 4 * This file is provided under a dual BSD/GPLv2 license. When using or 5 * redistributing this file, you may do so under either license. 6 * 7 * GPL LICENSE SUMMARY 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of version 2 of the GNU General Public License as 11 * published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, but 14 * WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * General Public License for more details. 17 * 18 * BSD LICENSE 19 * 20 * Redistribution and use in source and binary forms, with or without 21 * modification, are permitted provided that the following conditions 22 * are met: 23 * 24 * - Redistributions of source code must retain the above copyright 25 * notice, this list of conditions and the following disclaimer. 26 * - Redistributions in binary form must reproduce the above copyright 27 * notice, this list of conditions and the following disclaimer in 28 * the documentation and/or other materials provided with the 29 * distribution. 30 * - Neither the name of Intel Corporation nor the names of its 31 * contributors may be used to endorse or promote products derived 32 * from this software without specific prior written permission. 33 * 34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 36 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 38 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 39 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 45 * 46 */ 47 48#include <rdma/ib_mad.h> 49#include "mad.h" 50#include "vt.h" 51 52/** 53 * rvt_process_mad - process an incoming MAD packet 54 * @ibdev: the infiniband device this packet came in on 55 * @mad_flags: MAD flags 56 * @port_num: the port number this packet came in on, 1 based from ib core 57 * @in_wc: the work completion entry for this packet 58 * @in_grh: the global route header for this packet 59 * @in: the incoming MAD 60 * @in_mad_size: size of the incoming MAD reply 61 * @out: any outgoing MAD reply 62 * @out_mad_size: size of the outgoing MAD reply 63 * @out_mad_pkey_index: unused 64 * 65 * Note that the verbs framework has already done the MAD sanity checks, 66 * and hop count/pointer updating for IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE 67 * MADs. 68 * 69 * This is called by the ib_mad module. 70 * 71 * Return: IB_MAD_RESULT_SUCCESS or error 72 */ 73int rvt_process_mad(struct ib_device *ibdev, int mad_flags, u32 port_num, 74 const struct ib_wc *in_wc, const struct ib_grh *in_grh, 75 const struct ib_mad_hdr *in, size_t in_mad_size, 76 struct ib_mad_hdr *out, size_t *out_mad_size, 77 u16 *out_mad_pkey_index) 78{ 79 /* 80 * MAD processing is quite different between hfi1 and qib. Therefore 81 * this is expected to be provided by the driver. Other drivers in the 82 * future may choose to implement this but it should not be made into a 83 * requirement. 84 */ 85 return IB_MAD_RESULT_FAILURE; 86} 87 88static void rvt_send_mad_handler(struct ib_mad_agent *agent, 89 struct ib_mad_send_wc *mad_send_wc) 90{ 91 ib_free_send_mad(mad_send_wc->send_buf); 92} 93 94/** 95 * rvt_create_mad_agents - create mad agents 96 * @rdi: rvt dev struct 97 * 98 * If driver needs to be notified of mad agent creation then call back 99 * 100 * Return 0 on success 101 */ 102int rvt_create_mad_agents(struct rvt_dev_info *rdi) 103{ 104 struct ib_mad_agent *agent; 105 struct rvt_ibport *rvp; 106 int p; 107 int ret; 108 109 for (p = 0; p < rdi->dparms.nports; p++) { 110 rvp = rdi->ports[p]; 111 agent = ib_register_mad_agent(&rdi->ibdev, p + 1, 112 IB_QPT_SMI, 113 NULL, 0, rvt_send_mad_handler, 114 NULL, NULL, 0); 115 if (IS_ERR(agent)) { 116 ret = PTR_ERR(agent); 117 goto err; 118 } 119 120 rvp->send_agent = agent; 121 122 if (rdi->driver_f.notify_create_mad_agent) 123 rdi->driver_f.notify_create_mad_agent(rdi, p); 124 } 125 126 return 0; 127 128err: 129 for (p = 0; p < rdi->dparms.nports; p++) { 130 rvp = rdi->ports[p]; 131 if (rvp->send_agent) { 132 agent = rvp->send_agent; 133 rvp->send_agent = NULL; 134 ib_unregister_mad_agent(agent); 135 if (rdi->driver_f.notify_free_mad_agent) 136 rdi->driver_f.notify_free_mad_agent(rdi, p); 137 } 138 } 139 140 return ret; 141} 142 143/** 144 * rvt_free_mad_agents - free up mad agents 145 * @rdi: rvt dev struct 146 * 147 * If driver needs notification of mad agent removal make the call back 148 */ 149void rvt_free_mad_agents(struct rvt_dev_info *rdi) 150{ 151 struct ib_mad_agent *agent; 152 struct rvt_ibport *rvp; 153 int p; 154 155 for (p = 0; p < rdi->dparms.nports; p++) { 156 rvp = rdi->ports[p]; 157 if (rvp->send_agent) { 158 agent = rvp->send_agent; 159 rvp->send_agent = NULL; 160 ib_unregister_mad_agent(agent); 161 } 162 if (rvp->sm_ah) { 163 rdma_destroy_ah(&rvp->sm_ah->ibah, 164 RDMA_DESTROY_AH_SLEEPABLE); 165 rvp->sm_ah = NULL; 166 } 167 168 if (rdi->driver_f.notify_free_mad_agent) 169 rdi->driver_f.notify_free_mad_agent(rdi, p); 170 } 171} 172 173