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 */ 73 int rvt_process_mad(struct ib_device *ibdev, int mad_flags, u8 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 if (ibport_num_to_idx(ibdev, port_num) < 0) 86 return -EINVAL; 87 88 return IB_MAD_RESULT_FAILURE; 89 } 90 91 static void rvt_send_mad_handler(struct ib_mad_agent *agent, 92 struct ib_mad_send_wc *mad_send_wc) 93 { 94 ib_free_send_mad(mad_send_wc->send_buf); 95 } 96 97 /** 98 * rvt_create_mad_agents - create mad agents 99 * @rdi: rvt dev struct 100 * 101 * If driver needs to be notified of mad agent creation then call back 102 * 103 * Return 0 on success 104 */ 105 int rvt_create_mad_agents(struct rvt_dev_info *rdi) 106 { 107 struct ib_mad_agent *agent; 108 struct rvt_ibport *rvp; 109 int p; 110 int ret; 111 112 for (p = 0; p < rdi->dparms.nports; p++) { 113 rvp = rdi->ports[p]; 114 agent = ib_register_mad_agent(&rdi->ibdev, p + 1, 115 IB_QPT_SMI, 116 NULL, 0, rvt_send_mad_handler, 117 NULL, NULL, 0); 118 if (IS_ERR(agent)) { 119 ret = PTR_ERR(agent); 120 goto err; 121 } 122 123 rvp->send_agent = agent; 124 125 if (rdi->driver_f.notify_create_mad_agent) 126 rdi->driver_f.notify_create_mad_agent(rdi, p); 127 } 128 129 return 0; 130 131 err: 132 for (p = 0; p < rdi->dparms.nports; p++) { 133 rvp = rdi->ports[p]; 134 if (rvp->send_agent) { 135 agent = rvp->send_agent; 136 rvp->send_agent = NULL; 137 ib_unregister_mad_agent(agent); 138 if (rdi->driver_f.notify_free_mad_agent) 139 rdi->driver_f.notify_free_mad_agent(rdi, p); 140 } 141 } 142 143 return ret; 144 } 145 146 /** 147 * rvt_free_mad_agents - free up mad agents 148 * @rdi: rvt dev struct 149 * 150 * If driver needs notification of mad agent removal make the call back 151 */ 152 void rvt_free_mad_agents(struct rvt_dev_info *rdi) 153 { 154 struct ib_mad_agent *agent; 155 struct rvt_ibport *rvp; 156 int p; 157 158 for (p = 0; p < rdi->dparms.nports; p++) { 159 rvp = rdi->ports[p]; 160 if (rvp->send_agent) { 161 agent = rvp->send_agent; 162 rvp->send_agent = NULL; 163 ib_unregister_mad_agent(agent); 164 } 165 if (rvp->sm_ah) { 166 rdma_destroy_ah(&rvp->sm_ah->ibah, 167 RDMA_DESTROY_AH_SLEEPABLE); 168 rvp->sm_ah = NULL; 169 } 170 171 if (rdi->driver_f.notify_free_mad_agent) 172 rdi->driver_f.notify_free_mad_agent(rdi, p); 173 } 174 } 175 176