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 agent_send_response(struct ib_mad *mad, struct ib_grh *grh, 82 struct ib_wc *wc, struct ib_device *device, 83 int port_num, int qpn) 84 { 85 struct ib_agent_port_private *port_priv; 86 struct ib_mad_agent *agent; 87 struct ib_mad_send_buf *send_buf; 88 struct ib_ah *ah; 89 int ret; 90 91 port_priv = ib_get_agent_port(device, port_num); 92 if (!port_priv) { 93 printk(KERN_ERR SPFX "Unable to find port agent\n"); 94 return -ENODEV; 95 } 96 97 agent = port_priv->agent[qpn]; 98 ah = ib_create_ah_from_wc(agent->qp->pd, wc, grh, port_num); 99 if (IS_ERR(ah)) { 100 ret = PTR_ERR(ah); 101 printk(KERN_ERR SPFX "ib_create_ah_from_wc error:%d\n", ret); 102 return ret; 103 } 104 105 send_buf = ib_create_send_mad(agent, wc->src_qp, wc->pkey_index, 0, 106 IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, 107 GFP_KERNEL); 108 if (IS_ERR(send_buf)) { 109 ret = PTR_ERR(send_buf); 110 printk(KERN_ERR SPFX "ib_create_send_mad error:%d\n", ret); 111 goto err1; 112 } 113 114 memcpy(send_buf->mad, mad, sizeof *mad); 115 send_buf->ah = ah; 116 if ((ret = ib_post_send_mad(send_buf, NULL))) { 117 printk(KERN_ERR SPFX "ib_post_send_mad error:%d\n", ret); 118 goto err2; 119 } 120 return 0; 121 err2: 122 ib_free_send_mad(send_buf); 123 err1: 124 ib_destroy_ah(ah); 125 return ret; 126 } 127 128 static void agent_send_handler(struct ib_mad_agent *mad_agent, 129 struct ib_mad_send_wc *mad_send_wc) 130 { 131 ib_destroy_ah(mad_send_wc->send_buf->ah); 132 ib_free_send_mad(mad_send_wc->send_buf); 133 } 134 135 int ib_agent_port_open(struct ib_device *device, int port_num) 136 { 137 struct ib_agent_port_private *port_priv; 138 unsigned long flags; 139 int ret; 140 141 /* Create new device info */ 142 port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL); 143 if (!port_priv) { 144 printk(KERN_ERR SPFX "No memory for ib_agent_port_private\n"); 145 ret = -ENOMEM; 146 goto error1; 147 } 148 149 /* Obtain send only MAD agent for SMI QP */ 150 port_priv->agent[0] = ib_register_mad_agent(device, port_num, 151 IB_QPT_SMI, NULL, 0, 152 &agent_send_handler, 153 NULL, NULL); 154 if (IS_ERR(port_priv->agent[0])) { 155 ret = PTR_ERR(port_priv->agent[0]); 156 goto error2; 157 } 158 159 /* Obtain send only MAD agent for GSI QP */ 160 port_priv->agent[1] = ib_register_mad_agent(device, port_num, 161 IB_QPT_GSI, NULL, 0, 162 &agent_send_handler, 163 NULL, NULL); 164 if (IS_ERR(port_priv->agent[1])) { 165 ret = PTR_ERR(port_priv->agent[1]); 166 goto error3; 167 } 168 169 spin_lock_irqsave(&ib_agent_port_list_lock, flags); 170 list_add_tail(&port_priv->port_list, &ib_agent_port_list); 171 spin_unlock_irqrestore(&ib_agent_port_list_lock, flags); 172 173 return 0; 174 175 error3: 176 ib_unregister_mad_agent(port_priv->agent[0]); 177 error2: 178 kfree(port_priv); 179 error1: 180 return ret; 181 } 182 183 int ib_agent_port_close(struct ib_device *device, int port_num) 184 { 185 struct ib_agent_port_private *port_priv; 186 unsigned long flags; 187 188 spin_lock_irqsave(&ib_agent_port_list_lock, flags); 189 port_priv = __ib_get_agent_port(device, port_num); 190 if (port_priv == NULL) { 191 spin_unlock_irqrestore(&ib_agent_port_list_lock, flags); 192 printk(KERN_ERR SPFX "Port %d not found\n", port_num); 193 return -ENODEV; 194 } 195 list_del(&port_priv->port_list); 196 spin_unlock_irqrestore(&ib_agent_port_list_lock, flags); 197 198 ib_unregister_mad_agent(port_priv->agent[1]); 199 ib_unregister_mad_agent(port_priv->agent[0]); 200 kfree(port_priv); 201 return 0; 202 } 203