1 /* 2 * Copyright(c) 2015 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 51 /** 52 * rvt_process_mad - process an incoming MAD packet 53 * @ibdev: the infiniband device this packet came in on 54 * @mad_flags: MAD flags 55 * @port: the port number this packet came in on 56 * @in_wc: the work completion entry for this packet 57 * @in_grh: the global route header for this packet 58 * @in_mad: the incoming MAD 59 * @out_mad: any outgoing MAD reply 60 * 61 * Returns IB_MAD_RESULT_SUCCESS if this is a MAD that we are not 62 * interested in processing. 63 * 64 * Note that the verbs framework has already done the MAD sanity checks, 65 * and hop count/pointer updating for IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE 66 * MADs. 67 * 68 * This is called by the ib_mad module. 69 */ 70 int rvt_process_mad(struct ib_device *ibdev, int mad_flags, u8 port, 71 const struct ib_wc *in_wc, const struct ib_grh *in_grh, 72 const struct ib_mad_hdr *in, size_t in_mad_size, 73 struct ib_mad_hdr *out, size_t *out_mad_size, 74 u16 *out_mad_pkey_index) 75 { 76 /* 77 * Drivers will need to provide a number of things. For exmaple counters 78 * will need to be maintained by the driver but shoud live in the rvt 79 * structure. More study will be needed to finalize the interface 80 * between drivers and rvt for mad packets. 81 * 82 *VT-DRIVER-API: ???? 83 * 84 */ 85 return IB_MAD_RESULT_FAILURE; 86 } 87 88 static 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 int rvt_create_mad_agents(struct rvt_dev_info *rdi) 95 { 96 struct ib_mad_agent *agent; 97 struct rvt_ibport *rvp; 98 int p; 99 int ret; 100 101 for (p = 0; p < rdi->dparms.nports; p++) { 102 rvp = rdi->ports[p]; 103 agent = ib_register_mad_agent(&rdi->ibdev, p + 1, 104 IB_QPT_SMI, 105 NULL, 0, rvt_send_mad_handler, 106 NULL, NULL, 0); 107 if (IS_ERR(agent)) { 108 ret = PTR_ERR(agent); 109 goto err; 110 } 111 112 rvp->send_agent = agent; 113 114 if (rdi->driver_f.notify_create_mad_agent) 115 rdi->driver_f.notify_create_mad_agent(rdi, p); 116 } 117 118 return 0; 119 120 err: 121 for (p = 0; p < rdi->dparms.nports; p++) { 122 rvp = rdi->ports[p]; 123 if (rvp->send_agent) { 124 agent = rvp->send_agent; 125 rvp->send_agent = NULL; 126 ib_unregister_mad_agent(agent); 127 if (rdi->driver_f.notify_free_mad_agent) 128 rdi->driver_f.notify_free_mad_agent(rdi, p); 129 } 130 } 131 132 return ret; 133 } 134 135 void rvt_free_mad_agents(struct rvt_dev_info *rdi) 136 { 137 struct ib_mad_agent *agent; 138 struct rvt_ibport *rvp; 139 int p; 140 141 for (p = 0; p < rdi->dparms.nports; p++) { 142 rvp = rdi->ports[p]; 143 if (rvp->send_agent) { 144 agent = rvp->send_agent; 145 rvp->send_agent = NULL; 146 ib_unregister_mad_agent(agent); 147 } 148 if (rvp->sm_ah) { 149 ib_destroy_ah(&rvp->sm_ah->ibah); 150 rvp->sm_ah = NULL; 151 } 152 153 if (rdi->driver_f.notify_free_mad_agent) 154 rdi->driver_f.notify_free_mad_agent(rdi, p); 155 } 156 } 157 158