Linux kernel mirror (for testing)
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linux
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
48struct ib_agent_port_private {
49 struct list_head port_list;
50 struct ib_mad_agent *agent[2];
51};
52
53static DEFINE_SPINLOCK(ib_agent_port_list_lock);
54static LIST_HEAD(ib_agent_port_list);
55
56static 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
69static struct ib_agent_port_private *
70ib_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
81int 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;
121err2:
122 ib_free_send_mad(send_buf);
123err1:
124 ib_destroy_ah(ah);
125 return ret;
126}
127
128static 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
135int 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
175error3:
176 ib_unregister_mad_agent(port_priv->agent[0]);
177error2:
178 kfree(port_priv);
179error1:
180 return ret;
181}
182
183int 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}