1 /* 2 * Copyright (c) 2004, 2005 Mellanox Technologies Ltd. All rights reserved. 3 * Copyright (c) 2004, 2005 Infinicon Corporation. All rights reserved. 4 * Copyright (c) 2004, 2005 Intel Corporation. All rights reserved. 5 * Copyright (c) 2004, 2005 Topspin Corporation. All rights reserved. 6 * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved. 7 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 8 * 9 * This software is available to you under a choice of one of two 10 * licenses. You may choose to be licensed under the terms of the GNU 11 * General Public License (GPL) Version 2, available from the file 12 * COPYING in the main directory of this source tree, or the 13 * OpenIB.org BSD license below: 14 * 15 * Redistribution and use in source and binary forms, with or 16 * without modification, are permitted provided that the following 17 * conditions are met: 18 * 19 * - Redistributions of source code must retain the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer. 22 * 23 * - Redistributions in binary form must reproduce the above 24 * copyright notice, this list of conditions and the following 25 * disclaimer in the documentation and/or other materials 26 * provided with the distribution. 27 * 28 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 29 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 31 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 32 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 33 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 34 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 35 * SOFTWARE. 36 * 37 * $Id: agent.c 1389 2004-12-27 22:56:47Z roland $ 38 */ 39 40 #include <linux/slab.h> 41 #include <linux/string.h> 42 43 #include "agent.h" 44 #include "smi.h" 45 46 #define SPFX "ib_agent: " 47 48 struct ib_agent_port_private { 49 struct list_head port_list; 50 struct ib_mad_agent *agent[2]; 51 }; 52 53 static DEFINE_SPINLOCK(ib_agent_port_list_lock); 54 static LIST_HEAD(ib_agent_port_list); 55 56 static struct ib_agent_port_private * 57 __ib_get_agent_port(struct ib_device *device, int port_num) 58 { 59 struct ib_agent_port_private *entry; 60 61 list_for_each_entry(entry, &ib_agent_port_list, port_list) { 62 if (entry->agent[0]->device == device && 63 entry->agent[0]->port_num == port_num) 64 return entry; 65 } 66 return NULL; 67 } 68 69 static struct ib_agent_port_private * 70 ib_get_agent_port(struct ib_device *device, int port_num) 71 { 72 struct ib_agent_port_private *entry; 73 unsigned long flags; 74 75 spin_lock_irqsave(&ib_agent_port_list_lock, flags); 76 entry = __ib_get_agent_port(device, port_num); 77 spin_unlock_irqrestore(&ib_agent_port_list_lock, flags); 78 return entry; 79 } 80 81 int smi_check_local_dr_smp(struct ib_smp *smp, 82 struct ib_device *device, 83 int port_num) 84 { 85 struct ib_agent_port_private *port_priv; 86 87 if (smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) 88 return 1; 89 90 port_priv = ib_get_agent_port(device, port_num); 91 if (!port_priv) { 92 printk(KERN_DEBUG SPFX "smi_check_local_dr_smp %s port %d " 93 "not open\n", device->name, port_num); 94 return 1; 95 } 96 97 return smi_check_local_smp(port_priv->agent[0], smp); 98 } 99 100 int agent_send_response(struct ib_mad *mad, struct ib_grh *grh, 101 struct ib_wc *wc, struct ib_device *device, 102 int port_num, int qpn) 103 { 104 struct ib_agent_port_private *port_priv; 105 struct ib_mad_agent *agent; 106 struct ib_mad_send_buf *send_buf; 107 struct ib_ah *ah; 108 int ret; 109 110 port_priv = ib_get_agent_port(device, port_num); 111 if (!port_priv) { 112 printk(KERN_ERR SPFX "Unable to find port agent\n"); 113 return -ENODEV; 114 } 115 116 agent = port_priv->agent[qpn]; 117 ah = ib_create_ah_from_wc(agent->qp->pd, wc, grh, port_num); 118 if (IS_ERR(ah)) { 119 ret = PTR_ERR(ah); 120 printk(KERN_ERR SPFX "ib_create_ah_from_wc error:%d\n", ret); 121 return ret; 122 } 123 124 send_buf = ib_create_send_mad(agent, wc->src_qp, wc->pkey_index, 0, 125 IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, 126 GFP_KERNEL); 127 if (IS_ERR(send_buf)) { 128 ret = PTR_ERR(send_buf); 129 printk(KERN_ERR SPFX "ib_create_send_mad error:%d\n", ret); 130 goto err1; 131 } 132 133 memcpy(send_buf->mad, mad, sizeof *mad); 134 send_buf->ah = ah; 135 if ((ret = ib_post_send_mad(send_buf, NULL))) { 136 printk(KERN_ERR SPFX "ib_post_send_mad error:%d\n", ret); 137 goto err2; 138 } 139 return 0; 140 err2: 141 ib_free_send_mad(send_buf); 142 err1: 143 ib_destroy_ah(ah); 144 return ret; 145 } 146 147 static void agent_send_handler(struct ib_mad_agent *mad_agent, 148 struct ib_mad_send_wc *mad_send_wc) 149 { 150 ib_destroy_ah(mad_send_wc->send_buf->ah); 151 ib_free_send_mad(mad_send_wc->send_buf); 152 } 153 154 int ib_agent_port_open(struct ib_device *device, int port_num) 155 { 156 struct ib_agent_port_private *port_priv; 157 unsigned long flags; 158 int ret; 159 160 /* Create new device info */ 161 port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL); 162 if (!port_priv) { 163 printk(KERN_ERR SPFX "No memory for ib_agent_port_private\n"); 164 ret = -ENOMEM; 165 goto error1; 166 } 167 168 /* Obtain send only MAD agent for SMI QP */ 169 port_priv->agent[0] = ib_register_mad_agent(device, port_num, 170 IB_QPT_SMI, NULL, 0, 171 &agent_send_handler, 172 NULL, NULL); 173 if (IS_ERR(port_priv->agent[0])) { 174 ret = PTR_ERR(port_priv->agent[0]); 175 goto error2; 176 } 177 178 /* Obtain send only MAD agent for GSI QP */ 179 port_priv->agent[1] = ib_register_mad_agent(device, port_num, 180 IB_QPT_GSI, NULL, 0, 181 &agent_send_handler, 182 NULL, NULL); 183 if (IS_ERR(port_priv->agent[1])) { 184 ret = PTR_ERR(port_priv->agent[1]); 185 goto error3; 186 } 187 188 spin_lock_irqsave(&ib_agent_port_list_lock, flags); 189 list_add_tail(&port_priv->port_list, &ib_agent_port_list); 190 spin_unlock_irqrestore(&ib_agent_port_list_lock, flags); 191 192 return 0; 193 194 error3: 195 ib_unregister_mad_agent(port_priv->agent[0]); 196 error2: 197 kfree(port_priv); 198 error1: 199 return ret; 200 } 201 202 int ib_agent_port_close(struct ib_device *device, int port_num) 203 { 204 struct ib_agent_port_private *port_priv; 205 unsigned long flags; 206 207 spin_lock_irqsave(&ib_agent_port_list_lock, flags); 208 port_priv = __ib_get_agent_port(device, port_num); 209 if (port_priv == NULL) { 210 spin_unlock_irqrestore(&ib_agent_port_list_lock, flags); 211 printk(KERN_ERR SPFX "Port %d not found\n", port_num); 212 return -ENODEV; 213 } 214 list_del(&port_priv->port_list); 215 spin_unlock_irqrestore(&ib_agent_port_list_lock, flags); 216 217 ib_unregister_mad_agent(port_priv->agent[1]); 218 ib_unregister_mad_agent(port_priv->agent[0]); 219 kfree(port_priv); 220 return 0; 221 } 222