2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
4 * Copyright (c) 2004, 2005 Mellanox Technologies Ltd. All rights reserved.
5 * Copyright (c) 2004, 2005 Infinicon Corporation. All rights reserved.
6 * Copyright (c) 2004, 2005 Intel Corporation. All rights reserved.
7 * Copyright (c) 2004, 2005 Topspin Corporation. All rights reserved.
8 * Copyright (c) 2004-2007 Voltaire Corporation. All rights reserved.
9 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
11 * This software is available to you under a choice of one of two
12 * licenses. You may choose to be licensed under the terms of the GNU
13 * General Public License (GPL) Version 2, available from the file
14 * COPYING in the main directory of this source tree, or the
15 * OpenIB.org BSD license below:
17 * Redistribution and use in source and binary forms, with or
18 * without modification, are permitted provided that the following
21 * - Redistributions of source code must retain the above
22 * copyright notice, this list of conditions and the following
25 * - Redistributions in binary form must reproduce the above
26 * copyright notice, this list of conditions and the following
27 * disclaimer in the documentation and/or other materials
28 * provided with the distribution.
30 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
31 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
32 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
33 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
34 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
35 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
36 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD$");
43 #include <linux/slab.h>
44 #include <linux/string.h>
50 #define SPFX "ib_agent: "
52 struct ib_agent_port_private {
53 struct list_head port_list;
54 struct ib_mad_agent *agent[2];
57 static DEFINE_SPINLOCK(ib_agent_port_list_lock);
58 static LIST_HEAD(ib_agent_port_list);
60 static struct ib_agent_port_private *
61 __ib_get_agent_port(const struct ib_device *device, int port_num)
63 struct ib_agent_port_private *entry;
65 list_for_each_entry(entry, &ib_agent_port_list, port_list) {
66 if (entry->agent[1]->device == device &&
67 entry->agent[1]->port_num == port_num)
73 static struct ib_agent_port_private *
74 ib_get_agent_port(const struct ib_device *device, int port_num)
76 struct ib_agent_port_private *entry;
79 spin_lock_irqsave(&ib_agent_port_list_lock, flags);
80 entry = __ib_get_agent_port(device, port_num);
81 spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
85 void agent_send_response(const struct ib_mad_hdr *mad_hdr, const struct ib_grh *grh,
86 const struct ib_wc *wc, const struct ib_device *device,
87 int port_num, int qpn, size_t resp_mad_len, bool opa)
89 struct ib_agent_port_private *port_priv;
90 struct ib_mad_agent *agent;
91 struct ib_mad_send_buf *send_buf;
93 struct ib_mad_send_wr_private *mad_send_wr;
95 if (rdma_cap_ib_switch(device))
96 port_priv = ib_get_agent_port(device, 0);
98 port_priv = ib_get_agent_port(device, port_num);
101 dev_err(&device->dev, "Unable to find port agent\n");
105 agent = port_priv->agent[qpn];
106 ah = ib_create_ah_from_wc(agent->qp->pd, wc, grh, port_num);
108 dev_err(&device->dev, "ib_create_ah_from_wc error %ld\n",
113 if (opa && mad_hdr->base_version != OPA_MGMT_BASE_VERSION)
114 resp_mad_len = IB_MGMT_MAD_SIZE;
116 send_buf = ib_create_send_mad(agent, wc->src_qp, wc->pkey_index, 0,
118 resp_mad_len - IB_MGMT_MAD_HDR,
120 mad_hdr->base_version);
121 if (IS_ERR(send_buf)) {
122 dev_err(&device->dev, "ib_create_send_mad error\n");
126 memcpy(send_buf->mad, mad_hdr, resp_mad_len);
129 if (rdma_cap_ib_switch(device)) {
130 mad_send_wr = container_of(send_buf,
131 struct ib_mad_send_wr_private,
133 mad_send_wr->send_wr.port_num = port_num;
136 if (ib_post_send_mad(send_buf, NULL)) {
137 dev_err(&device->dev, "ib_post_send_mad error\n");
142 ib_free_send_mad(send_buf);
147 static void agent_send_handler(struct ib_mad_agent *mad_agent,
148 struct ib_mad_send_wc *mad_send_wc)
150 ib_destroy_ah(mad_send_wc->send_buf->ah);
151 ib_free_send_mad(mad_send_wc->send_buf);
154 int ib_agent_port_open(struct ib_device *device, int port_num)
156 struct ib_agent_port_private *port_priv;
160 /* Create new device info */
161 port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL);
163 dev_err(&device->dev, "No memory for ib_agent_port_private\n");
168 if (rdma_cap_ib_smi(device, port_num)) {
169 /* Obtain send only MAD agent for SMI QP */
170 port_priv->agent[0] = ib_register_mad_agent(device, port_num,
174 if (IS_ERR(port_priv->agent[0])) {
175 ret = PTR_ERR(port_priv->agent[0]);
180 /* Obtain send only MAD agent for GSI QP */
181 port_priv->agent[1] = ib_register_mad_agent(device, port_num,
185 if (IS_ERR(port_priv->agent[1])) {
186 ret = PTR_ERR(port_priv->agent[1]);
190 spin_lock_irqsave(&ib_agent_port_list_lock, flags);
191 list_add_tail(&port_priv->port_list, &ib_agent_port_list);
192 spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
197 if (port_priv->agent[0])
198 ib_unregister_mad_agent(port_priv->agent[0]);
205 int ib_agent_port_close(struct ib_device *device, int port_num)
207 struct ib_agent_port_private *port_priv;
210 spin_lock_irqsave(&ib_agent_port_list_lock, flags);
211 port_priv = __ib_get_agent_port(device, port_num);
212 if (port_priv == NULL) {
213 spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
214 dev_err(&device->dev, "Port %d not found\n", port_num);
217 list_del(&port_priv->port_list);
218 spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
220 ib_unregister_mad_agent(port_priv->agent[1]);
221 if (port_priv->agent[0])
222 ib_unregister_mad_agent(port_priv->agent[0]);