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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) 2004-2007 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 */
38
39#include <linux/slab.h>
40#include <linux/string.h>
41
42#include "agent.h"
43#include "smi.h"
44#include "mad_priv.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(const 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 /* Need to check both agent[0] and agent[1], as an agent port
63 * may only have one of them
64 */
65 if (entry->agent[0] &&
66 entry->agent[0]->device == device &&
67 entry->agent[0]->port_num == port_num)
68 return entry;
69
70 if (entry->agent[1] &&
71 entry->agent[1]->device == device &&
72 entry->agent[1]->port_num == port_num)
73 return entry;
74 }
75 return NULL;
76}
77
78static struct ib_agent_port_private *
79ib_get_agent_port(const struct ib_device *device, int port_num)
80{
81 struct ib_agent_port_private *entry;
82 unsigned long flags;
83
84 spin_lock_irqsave(&ib_agent_port_list_lock, flags);
85 entry = __ib_get_agent_port(device, port_num);
86 spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
87 return entry;
88}
89
90void agent_send_response(const struct ib_mad_hdr *mad_hdr, const struct ib_grh *grh,
91 const struct ib_wc *wc, const struct ib_device *device,
92 int port_num, int qpn, size_t resp_mad_len, bool opa)
93{
94 struct ib_agent_port_private *port_priv;
95 struct ib_mad_agent *agent;
96 struct ib_mad_send_buf *send_buf;
97 struct ib_ah *ah;
98 struct ib_mad_send_wr_private *mad_send_wr;
99
100 if (rdma_cap_ib_switch(device))
101 port_priv = ib_get_agent_port(device, 0);
102 else
103 port_priv = ib_get_agent_port(device, port_num);
104
105 if (!port_priv) {
106 dev_err(&device->dev, "Unable to find port agent\n");
107 return;
108 }
109
110 agent = port_priv->agent[qpn];
111 ah = ib_create_ah_from_wc(agent->qp->pd, wc, grh, port_num);
112 if (IS_ERR(ah)) {
113 dev_err(&device->dev, "ib_create_ah_from_wc error %ld\n",
114 PTR_ERR(ah));
115 return;
116 }
117
118 if (opa && mad_hdr->base_version != OPA_MGMT_BASE_VERSION)
119 resp_mad_len = IB_MGMT_MAD_SIZE;
120
121 send_buf = ib_create_send_mad(agent, wc->src_qp, wc->pkey_index, 0,
122 IB_MGMT_MAD_HDR,
123 resp_mad_len - IB_MGMT_MAD_HDR,
124 GFP_KERNEL,
125 mad_hdr->base_version);
126 if (IS_ERR(send_buf)) {
127 dev_err(&device->dev, "ib_create_send_mad error\n");
128 goto err1;
129 }
130
131 memcpy(send_buf->mad, mad_hdr, resp_mad_len);
132 send_buf->ah = ah;
133
134 if (rdma_cap_ib_switch(device)) {
135 mad_send_wr = container_of(send_buf,
136 struct ib_mad_send_wr_private,
137 send_buf);
138 mad_send_wr->send_wr.port_num = port_num;
139 }
140
141 if (ib_post_send_mad(send_buf, NULL)) {
142 dev_err(&device->dev, "ib_post_send_mad error\n");
143 goto err2;
144 }
145 return;
146err2:
147 ib_free_send_mad(send_buf);
148err1:
149 rdma_destroy_ah(ah, RDMA_DESTROY_AH_SLEEPABLE);
150}
151
152static void agent_send_handler(struct ib_mad_agent *mad_agent,
153 struct ib_mad_send_wc *mad_send_wc)
154{
155 rdma_destroy_ah(mad_send_wc->send_buf->ah, RDMA_DESTROY_AH_SLEEPABLE);
156 ib_free_send_mad(mad_send_wc->send_buf);
157}
158
159int ib_agent_port_open(struct ib_device *device, int port_num)
160{
161 struct ib_agent_port_private *port_priv;
162 unsigned long flags;
163 int ret;
164
165 /* Create new device info */
166 port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL);
167 if (!port_priv) {
168 ret = -ENOMEM;
169 goto error1;
170 }
171
172 if (rdma_cap_ib_smi(device, port_num)) {
173 /* Obtain send only MAD agent for SMI QP */
174 port_priv->agent[0] = ib_register_mad_agent(device, port_num,
175 IB_QPT_SMI, NULL, 0,
176 &agent_send_handler,
177 NULL, NULL, 0);
178 if (IS_ERR(port_priv->agent[0])) {
179 ret = PTR_ERR(port_priv->agent[0]);
180 goto error2;
181 }
182 }
183
184 if (rdma_cap_ib_cm(device, port_num)) {
185 /* Obtain send only MAD agent for GSI QP */
186 port_priv->agent[1] = ib_register_mad_agent(device, port_num,
187 IB_QPT_GSI, NULL, 0,
188 &agent_send_handler,
189 NULL, NULL, 0);
190 if (IS_ERR(port_priv->agent[1])) {
191 ret = PTR_ERR(port_priv->agent[1]);
192 goto error3;
193 }
194 }
195
196 spin_lock_irqsave(&ib_agent_port_list_lock, flags);
197 list_add_tail(&port_priv->port_list, &ib_agent_port_list);
198 spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
199
200 return 0;
201
202error3:
203 if (port_priv->agent[0])
204 ib_unregister_mad_agent(port_priv->agent[0]);
205error2:
206 kfree(port_priv);
207error1:
208 return ret;
209}
210
211int ib_agent_port_close(struct ib_device *device, int port_num)
212{
213 struct ib_agent_port_private *port_priv;
214 unsigned long flags;
215
216 spin_lock_irqsave(&ib_agent_port_list_lock, flags);
217 port_priv = __ib_get_agent_port(device, port_num);
218 if (port_priv == NULL) {
219 spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
220 dev_err(&device->dev, "Port %d not found\n", port_num);
221 return -ENODEV;
222 }
223 list_del(&port_priv->port_list);
224 spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
225
226 if (port_priv->agent[1])
227 ib_unregister_mad_agent(port_priv->agent[1]);
228 if (port_priv->agent[0])
229 ib_unregister_mad_agent(port_priv->agent[0]);
230
231 kfree(port_priv);
232 return 0;
233}
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) 2004-2007 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 */
38
39#include <linux/slab.h>
40#include <linux/string.h>
41
42#include "agent.h"
43#include "smi.h"
44#include "mad_priv.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(const 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[1]->device == device &&
63 entry->agent[1]->port_num == port_num)
64 return entry;
65 }
66 return NULL;
67}
68
69static struct ib_agent_port_private *
70ib_get_agent_port(const 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
81void agent_send_response(const struct ib_mad_hdr *mad_hdr, const struct ib_grh *grh,
82 const struct ib_wc *wc, const struct ib_device *device,
83 int port_num, int qpn, size_t resp_mad_len, bool opa)
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 struct ib_mad_send_wr_private *mad_send_wr;
90
91 if (rdma_cap_ib_switch(device))
92 port_priv = ib_get_agent_port(device, 0);
93 else
94 port_priv = ib_get_agent_port(device, port_num);
95
96 if (!port_priv) {
97 dev_err(&device->dev, "Unable to find port agent\n");
98 return;
99 }
100
101 agent = port_priv->agent[qpn];
102 ah = ib_create_ah_from_wc(agent->qp->pd, wc, grh, port_num);
103 if (IS_ERR(ah)) {
104 dev_err(&device->dev, "ib_create_ah_from_wc error %ld\n",
105 PTR_ERR(ah));
106 return;
107 }
108
109 if (opa && mad_hdr->base_version != OPA_MGMT_BASE_VERSION)
110 resp_mad_len = IB_MGMT_MAD_SIZE;
111
112 send_buf = ib_create_send_mad(agent, wc->src_qp, wc->pkey_index, 0,
113 IB_MGMT_MAD_HDR,
114 resp_mad_len - IB_MGMT_MAD_HDR,
115 GFP_KERNEL,
116 mad_hdr->base_version);
117 if (IS_ERR(send_buf)) {
118 dev_err(&device->dev, "ib_create_send_mad error\n");
119 goto err1;
120 }
121
122 memcpy(send_buf->mad, mad_hdr, resp_mad_len);
123 send_buf->ah = ah;
124
125 if (rdma_cap_ib_switch(device)) {
126 mad_send_wr = container_of(send_buf,
127 struct ib_mad_send_wr_private,
128 send_buf);
129 mad_send_wr->send_wr.port_num = port_num;
130 }
131
132 if (ib_post_send_mad(send_buf, NULL)) {
133 dev_err(&device->dev, "ib_post_send_mad error\n");
134 goto err2;
135 }
136 return;
137err2:
138 ib_free_send_mad(send_buf);
139err1:
140 rdma_destroy_ah(ah, RDMA_DESTROY_AH_SLEEPABLE);
141}
142
143static void agent_send_handler(struct ib_mad_agent *mad_agent,
144 struct ib_mad_send_wc *mad_send_wc)
145{
146 rdma_destroy_ah(mad_send_wc->send_buf->ah, RDMA_DESTROY_AH_SLEEPABLE);
147 ib_free_send_mad(mad_send_wc->send_buf);
148}
149
150int ib_agent_port_open(struct ib_device *device, int port_num)
151{
152 struct ib_agent_port_private *port_priv;
153 unsigned long flags;
154 int ret;
155
156 /* Create new device info */
157 port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL);
158 if (!port_priv) {
159 ret = -ENOMEM;
160 goto error1;
161 }
162
163 if (rdma_cap_ib_smi(device, port_num)) {
164 /* Obtain send only MAD agent for SMI QP */
165 port_priv->agent[0] = ib_register_mad_agent(device, port_num,
166 IB_QPT_SMI, NULL, 0,
167 &agent_send_handler,
168 NULL, NULL, 0);
169 if (IS_ERR(port_priv->agent[0])) {
170 ret = PTR_ERR(port_priv->agent[0]);
171 goto error2;
172 }
173 }
174
175 /* Obtain send only MAD agent for GSI QP */
176 port_priv->agent[1] = ib_register_mad_agent(device, port_num,
177 IB_QPT_GSI, NULL, 0,
178 &agent_send_handler,
179 NULL, NULL, 0);
180 if (IS_ERR(port_priv->agent[1])) {
181 ret = PTR_ERR(port_priv->agent[1]);
182 goto error3;
183 }
184
185 spin_lock_irqsave(&ib_agent_port_list_lock, flags);
186 list_add_tail(&port_priv->port_list, &ib_agent_port_list);
187 spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
188
189 return 0;
190
191error3:
192 if (port_priv->agent[0])
193 ib_unregister_mad_agent(port_priv->agent[0]);
194error2:
195 kfree(port_priv);
196error1:
197 return ret;
198}
199
200int ib_agent_port_close(struct ib_device *device, int port_num)
201{
202 struct ib_agent_port_private *port_priv;
203 unsigned long flags;
204
205 spin_lock_irqsave(&ib_agent_port_list_lock, flags);
206 port_priv = __ib_get_agent_port(device, port_num);
207 if (port_priv == NULL) {
208 spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
209 dev_err(&device->dev, "Port %d not found\n", port_num);
210 return -ENODEV;
211 }
212 list_del(&port_priv->port_list);
213 spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
214
215 ib_unregister_mad_agent(port_priv->agent[1]);
216 if (port_priv->agent[0])
217 ib_unregister_mad_agent(port_priv->agent[0]);
218
219 kfree(port_priv);
220 return 0;
221}