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1/*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
4 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35#include <linux/string.h>
36#include <linux/slab.h>
37
38#include <rdma/ib_verbs.h>
39#include <rdma/ib_mad.h>
40#include <rdma/ib_smi.h>
41
42#include "mthca_dev.h"
43#include "mthca_cmd.h"
44
45enum {
46 MTHCA_VENDOR_CLASS1 = 0x9,
47 MTHCA_VENDOR_CLASS2 = 0xa
48};
49
50static int mthca_update_rate(struct mthca_dev *dev, u8 port_num)
51{
52 struct ib_port_attr *tprops = NULL;
53 int ret;
54
55 tprops = kmalloc(sizeof *tprops, GFP_KERNEL);
56 if (!tprops)
57 return -ENOMEM;
58
59 ret = ib_query_port(&dev->ib_dev, port_num, tprops);
60 if (ret) {
61 printk(KERN_WARNING "ib_query_port failed (%d) for %s port %d\n",
62 ret, dev->ib_dev.name, port_num);
63 goto out;
64 }
65
66 dev->rate[port_num - 1] = tprops->active_speed *
67 ib_width_enum_to_int(tprops->active_width);
68
69out:
70 kfree(tprops);
71 return ret;
72}
73
74static void update_sm_ah(struct mthca_dev *dev,
75 u8 port_num, u16 lid, u8 sl)
76{
77 struct ib_ah *new_ah;
78 struct ib_ah_attr ah_attr;
79 unsigned long flags;
80
81 if (!dev->send_agent[port_num - 1][0])
82 return;
83
84 memset(&ah_attr, 0, sizeof ah_attr);
85 ah_attr.dlid = lid;
86 ah_attr.sl = sl;
87 ah_attr.port_num = port_num;
88
89 new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd,
90 &ah_attr);
91 if (IS_ERR(new_ah))
92 return;
93
94 spin_lock_irqsave(&dev->sm_lock, flags);
95 if (dev->sm_ah[port_num - 1])
96 ib_destroy_ah(dev->sm_ah[port_num - 1]);
97 dev->sm_ah[port_num - 1] = new_ah;
98 spin_unlock_irqrestore(&dev->sm_lock, flags);
99}
100
101/*
102 * Snoop SM MADs for port info and P_Key table sets, so we can
103 * synthesize LID change and P_Key change events.
104 */
105static void smp_snoop(struct ib_device *ibdev,
106 u8 port_num,
107 struct ib_mad *mad,
108 u16 prev_lid)
109{
110 struct ib_event event;
111
112 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
113 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
114 mad->mad_hdr.method == IB_MGMT_METHOD_SET) {
115 if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) {
116 struct ib_port_info *pinfo =
117 (struct ib_port_info *) ((struct ib_smp *) mad)->data;
118 u16 lid = be16_to_cpu(pinfo->lid);
119
120 mthca_update_rate(to_mdev(ibdev), port_num);
121 update_sm_ah(to_mdev(ibdev), port_num,
122 be16_to_cpu(pinfo->sm_lid),
123 pinfo->neighbormtu_mastersmsl & 0xf);
124
125 event.device = ibdev;
126 event.element.port_num = port_num;
127
128 if (pinfo->clientrereg_resv_subnetto & 0x80) {
129 event.event = IB_EVENT_CLIENT_REREGISTER;
130 ib_dispatch_event(&event);
131 }
132
133 if (prev_lid != lid) {
134 event.event = IB_EVENT_LID_CHANGE;
135 ib_dispatch_event(&event);
136 }
137 }
138
139 if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) {
140 event.device = ibdev;
141 event.event = IB_EVENT_PKEY_CHANGE;
142 event.element.port_num = port_num;
143 ib_dispatch_event(&event);
144 }
145 }
146}
147
148static void node_desc_override(struct ib_device *dev,
149 struct ib_mad *mad)
150{
151 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
152 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
153 mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP &&
154 mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) {
155 mutex_lock(&to_mdev(dev)->cap_mask_mutex);
156 memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64);
157 mutex_unlock(&to_mdev(dev)->cap_mask_mutex);
158 }
159}
160
161static void forward_trap(struct mthca_dev *dev,
162 u8 port_num,
163 struct ib_mad *mad)
164{
165 int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED;
166 struct ib_mad_send_buf *send_buf;
167 struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn];
168 int ret;
169 unsigned long flags;
170
171 if (agent) {
172 send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR,
173 IB_MGMT_MAD_DATA, GFP_ATOMIC);
174 if (IS_ERR(send_buf))
175 return;
176 /*
177 * We rely here on the fact that MLX QPs don't use the
178 * address handle after the send is posted (this is
179 * wrong following the IB spec strictly, but we know
180 * it's OK for our devices).
181 */
182 spin_lock_irqsave(&dev->sm_lock, flags);
183 memcpy(send_buf->mad, mad, sizeof *mad);
184 if ((send_buf->ah = dev->sm_ah[port_num - 1]))
185 ret = ib_post_send_mad(send_buf, NULL);
186 else
187 ret = -EINVAL;
188 spin_unlock_irqrestore(&dev->sm_lock, flags);
189
190 if (ret)
191 ib_free_send_mad(send_buf);
192 }
193}
194
195int mthca_process_mad(struct ib_device *ibdev,
196 int mad_flags,
197 u8 port_num,
198 struct ib_wc *in_wc,
199 struct ib_grh *in_grh,
200 struct ib_mad *in_mad,
201 struct ib_mad *out_mad)
202{
203 int err;
204 u16 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
205 u16 prev_lid = 0;
206 struct ib_port_attr pattr;
207
208 /* Forward locally generated traps to the SM */
209 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP &&
210 slid == 0) {
211 forward_trap(to_mdev(ibdev), port_num, in_mad);
212 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
213 }
214
215 /*
216 * Only handle SM gets, sets and trap represses for SM class
217 *
218 * Only handle PMA and Mellanox vendor-specific class gets and
219 * sets for other classes.
220 */
221 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
222 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
223 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
224 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET &&
225 in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS)
226 return IB_MAD_RESULT_SUCCESS;
227
228 /*
229 * Don't process SMInfo queries or vendor-specific
230 * MADs -- the SMA can't handle them.
231 */
232 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO ||
233 ((in_mad->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) ==
234 IB_SMP_ATTR_VENDOR_MASK))
235 return IB_MAD_RESULT_SUCCESS;
236 } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
237 in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS1 ||
238 in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS2) {
239 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
240 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET)
241 return IB_MAD_RESULT_SUCCESS;
242 } else
243 return IB_MAD_RESULT_SUCCESS;
244 if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
245 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
246 in_mad->mad_hdr.method == IB_MGMT_METHOD_SET &&
247 in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
248 !ib_query_port(ibdev, port_num, &pattr))
249 prev_lid = pattr.lid;
250
251 err = mthca_MAD_IFC(to_mdev(ibdev),
252 mad_flags & IB_MAD_IGNORE_MKEY,
253 mad_flags & IB_MAD_IGNORE_BKEY,
254 port_num, in_wc, in_grh, in_mad, out_mad);
255 if (err == -EBADMSG)
256 return IB_MAD_RESULT_SUCCESS;
257 else if (err) {
258 mthca_err(to_mdev(ibdev), "MAD_IFC returned %d\n", err);
259 return IB_MAD_RESULT_FAILURE;
260 }
261
262 if (!out_mad->mad_hdr.status) {
263 smp_snoop(ibdev, port_num, in_mad, prev_lid);
264 node_desc_override(ibdev, out_mad);
265 }
266
267 /* set return bit in status of directed route responses */
268 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
269 out_mad->mad_hdr.status |= cpu_to_be16(1 << 15);
270
271 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
272 /* no response for trap repress */
273 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
274
275 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
276}
277
278static void send_handler(struct ib_mad_agent *agent,
279 struct ib_mad_send_wc *mad_send_wc)
280{
281 ib_free_send_mad(mad_send_wc->send_buf);
282}
283
284int mthca_create_agents(struct mthca_dev *dev)
285{
286 struct ib_mad_agent *agent;
287 int p, q;
288 int ret;
289
290 spin_lock_init(&dev->sm_lock);
291
292 for (p = 0; p < dev->limits.num_ports; ++p)
293 for (q = 0; q <= 1; ++q) {
294 agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
295 q ? IB_QPT_GSI : IB_QPT_SMI,
296 NULL, 0, send_handler,
297 NULL, NULL);
298 if (IS_ERR(agent)) {
299 ret = PTR_ERR(agent);
300 goto err;
301 }
302 dev->send_agent[p][q] = agent;
303 }
304
305
306 for (p = 1; p <= dev->limits.num_ports; ++p) {
307 ret = mthca_update_rate(dev, p);
308 if (ret) {
309 mthca_err(dev, "Failed to obtain port %d rate."
310 " aborting.\n", p);
311 goto err;
312 }
313 }
314
315 return 0;
316
317err:
318 for (p = 0; p < dev->limits.num_ports; ++p)
319 for (q = 0; q <= 1; ++q)
320 if (dev->send_agent[p][q])
321 ib_unregister_mad_agent(dev->send_agent[p][q]);
322
323 return ret;
324}
325
326void mthca_free_agents(struct mthca_dev *dev)
327{
328 struct ib_mad_agent *agent;
329 int p, q;
330
331 for (p = 0; p < dev->limits.num_ports; ++p) {
332 for (q = 0; q <= 1; ++q) {
333 agent = dev->send_agent[p][q];
334 dev->send_agent[p][q] = NULL;
335 ib_unregister_mad_agent(agent);
336 }
337
338 if (dev->sm_ah[p])
339 ib_destroy_ah(dev->sm_ah[p]);
340 }
341}
1/*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
4 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35#include <linux/string.h>
36#include <linux/slab.h>
37
38#include <rdma/ib_verbs.h>
39#include <rdma/ib_mad.h>
40#include <rdma/ib_smi.h>
41
42#include "mthca_dev.h"
43#include "mthca_cmd.h"
44
45enum {
46 MTHCA_VENDOR_CLASS1 = 0x9,
47 MTHCA_VENDOR_CLASS2 = 0xa
48};
49
50static int mthca_update_rate(struct mthca_dev *dev, u8 port_num)
51{
52 struct ib_port_attr *tprops = NULL;
53 int ret;
54
55 tprops = kmalloc(sizeof *tprops, GFP_KERNEL);
56 if (!tprops)
57 return -ENOMEM;
58
59 ret = ib_query_port(&dev->ib_dev, port_num, tprops);
60 if (ret) {
61 dev_warn(&dev->ib_dev.dev,
62 "ib_query_port failed (%d) forport %d\n", ret,
63 port_num);
64 goto out;
65 }
66
67 dev->rate[port_num - 1] = tprops->active_speed *
68 ib_width_enum_to_int(tprops->active_width);
69
70out:
71 kfree(tprops);
72 return ret;
73}
74
75static void update_sm_ah(struct mthca_dev *dev,
76 u8 port_num, u16 lid, u8 sl)
77{
78 struct ib_ah *new_ah;
79 struct rdma_ah_attr ah_attr;
80 unsigned long flags;
81
82 if (!dev->send_agent[port_num - 1][0])
83 return;
84
85 memset(&ah_attr, 0, sizeof ah_attr);
86 ah_attr.type = rdma_ah_find_type(&dev->ib_dev, port_num);
87 rdma_ah_set_dlid(&ah_attr, lid);
88 rdma_ah_set_sl(&ah_attr, sl);
89 rdma_ah_set_port_num(&ah_attr, port_num);
90
91 new_ah = rdma_create_ah(dev->send_agent[port_num - 1][0]->qp->pd,
92 &ah_attr, 0);
93 if (IS_ERR(new_ah))
94 return;
95
96 spin_lock_irqsave(&dev->sm_lock, flags);
97 if (dev->sm_ah[port_num - 1])
98 rdma_destroy_ah(dev->sm_ah[port_num - 1], 0);
99 dev->sm_ah[port_num - 1] = new_ah;
100 spin_unlock_irqrestore(&dev->sm_lock, flags);
101}
102
103/*
104 * Snoop SM MADs for port info and P_Key table sets, so we can
105 * synthesize LID change and P_Key change events.
106 */
107static void smp_snoop(struct ib_device *ibdev,
108 u8 port_num,
109 const struct ib_mad *mad,
110 u16 prev_lid)
111{
112 struct ib_event event;
113
114 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
115 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
116 mad->mad_hdr.method == IB_MGMT_METHOD_SET) {
117 if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) {
118 struct ib_port_info *pinfo =
119 (struct ib_port_info *) ((struct ib_smp *) mad)->data;
120 u16 lid = be16_to_cpu(pinfo->lid);
121
122 mthca_update_rate(to_mdev(ibdev), port_num);
123 update_sm_ah(to_mdev(ibdev), port_num,
124 be16_to_cpu(pinfo->sm_lid),
125 pinfo->neighbormtu_mastersmsl & 0xf);
126
127 event.device = ibdev;
128 event.element.port_num = port_num;
129
130 if (pinfo->clientrereg_resv_subnetto & 0x80) {
131 event.event = IB_EVENT_CLIENT_REREGISTER;
132 ib_dispatch_event(&event);
133 }
134
135 if (prev_lid != lid) {
136 event.event = IB_EVENT_LID_CHANGE;
137 ib_dispatch_event(&event);
138 }
139 }
140
141 if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) {
142 event.device = ibdev;
143 event.event = IB_EVENT_PKEY_CHANGE;
144 event.element.port_num = port_num;
145 ib_dispatch_event(&event);
146 }
147 }
148}
149
150static void node_desc_override(struct ib_device *dev,
151 struct ib_mad *mad)
152{
153 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
154 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
155 mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP &&
156 mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) {
157 mutex_lock(&to_mdev(dev)->cap_mask_mutex);
158 memcpy(((struct ib_smp *) mad)->data, dev->node_desc,
159 IB_DEVICE_NODE_DESC_MAX);
160 mutex_unlock(&to_mdev(dev)->cap_mask_mutex);
161 }
162}
163
164static void forward_trap(struct mthca_dev *dev,
165 u8 port_num,
166 const struct ib_mad *mad)
167{
168 int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED;
169 struct ib_mad_send_buf *send_buf;
170 struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn];
171 int ret;
172 unsigned long flags;
173
174 if (agent) {
175 send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR,
176 IB_MGMT_MAD_DATA, GFP_ATOMIC,
177 IB_MGMT_BASE_VERSION);
178 if (IS_ERR(send_buf))
179 return;
180 /*
181 * We rely here on the fact that MLX QPs don't use the
182 * address handle after the send is posted (this is
183 * wrong following the IB spec strictly, but we know
184 * it's OK for our devices).
185 */
186 spin_lock_irqsave(&dev->sm_lock, flags);
187 memcpy(send_buf->mad, mad, sizeof *mad);
188 if ((send_buf->ah = dev->sm_ah[port_num - 1]))
189 ret = ib_post_send_mad(send_buf, NULL);
190 else
191 ret = -EINVAL;
192 spin_unlock_irqrestore(&dev->sm_lock, flags);
193
194 if (ret)
195 ib_free_send_mad(send_buf);
196 }
197}
198
199int mthca_process_mad(struct ib_device *ibdev,
200 int mad_flags,
201 u8 port_num,
202 const struct ib_wc *in_wc,
203 const struct ib_grh *in_grh,
204 const struct ib_mad_hdr *in, size_t in_mad_size,
205 struct ib_mad_hdr *out, size_t *out_mad_size,
206 u16 *out_mad_pkey_index)
207{
208 int err;
209 u16 slid = in_wc ? ib_lid_cpu16(in_wc->slid) : be16_to_cpu(IB_LID_PERMISSIVE);
210 u16 prev_lid = 0;
211 struct ib_port_attr pattr;
212 const struct ib_mad *in_mad = (const struct ib_mad *)in;
213 struct ib_mad *out_mad = (struct ib_mad *)out;
214
215 if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||
216 *out_mad_size != sizeof(*out_mad)))
217 return IB_MAD_RESULT_FAILURE;
218
219 /* Forward locally generated traps to the SM */
220 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP &&
221 slid == 0) {
222 forward_trap(to_mdev(ibdev), port_num, in_mad);
223 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
224 }
225
226 /*
227 * Only handle SM gets, sets and trap represses for SM class
228 *
229 * Only handle PMA and Mellanox vendor-specific class gets and
230 * sets for other classes.
231 */
232 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
233 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
234 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
235 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET &&
236 in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS)
237 return IB_MAD_RESULT_SUCCESS;
238
239 /*
240 * Don't process SMInfo queries or vendor-specific
241 * MADs -- the SMA can't handle them.
242 */
243 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO ||
244 ((in_mad->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) ==
245 IB_SMP_ATTR_VENDOR_MASK))
246 return IB_MAD_RESULT_SUCCESS;
247 } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
248 in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS1 ||
249 in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS2) {
250 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
251 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET)
252 return IB_MAD_RESULT_SUCCESS;
253 } else
254 return IB_MAD_RESULT_SUCCESS;
255 if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
256 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
257 in_mad->mad_hdr.method == IB_MGMT_METHOD_SET &&
258 in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
259 !ib_query_port(ibdev, port_num, &pattr))
260 prev_lid = ib_lid_cpu16(pattr.lid);
261
262 err = mthca_MAD_IFC(to_mdev(ibdev),
263 mad_flags & IB_MAD_IGNORE_MKEY,
264 mad_flags & IB_MAD_IGNORE_BKEY,
265 port_num, in_wc, in_grh, in_mad, out_mad);
266 if (err == -EBADMSG)
267 return IB_MAD_RESULT_SUCCESS;
268 else if (err) {
269 mthca_err(to_mdev(ibdev), "MAD_IFC returned %d\n", err);
270 return IB_MAD_RESULT_FAILURE;
271 }
272
273 if (!out_mad->mad_hdr.status) {
274 smp_snoop(ibdev, port_num, in_mad, prev_lid);
275 node_desc_override(ibdev, out_mad);
276 }
277
278 /* set return bit in status of directed route responses */
279 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
280 out_mad->mad_hdr.status |= cpu_to_be16(1 << 15);
281
282 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
283 /* no response for trap repress */
284 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
285
286 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
287}
288
289static void send_handler(struct ib_mad_agent *agent,
290 struct ib_mad_send_wc *mad_send_wc)
291{
292 ib_free_send_mad(mad_send_wc->send_buf);
293}
294
295int mthca_create_agents(struct mthca_dev *dev)
296{
297 struct ib_mad_agent *agent;
298 int p, q;
299 int ret;
300
301 spin_lock_init(&dev->sm_lock);
302
303 for (p = 0; p < dev->limits.num_ports; ++p)
304 for (q = 0; q <= 1; ++q) {
305 agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
306 q ? IB_QPT_GSI : IB_QPT_SMI,
307 NULL, 0, send_handler,
308 NULL, NULL, 0);
309 if (IS_ERR(agent)) {
310 ret = PTR_ERR(agent);
311 goto err;
312 }
313 dev->send_agent[p][q] = agent;
314 }
315
316
317 for (p = 1; p <= dev->limits.num_ports; ++p) {
318 ret = mthca_update_rate(dev, p);
319 if (ret) {
320 mthca_err(dev, "Failed to obtain port %d rate."
321 " aborting.\n", p);
322 goto err;
323 }
324 }
325
326 return 0;
327
328err:
329 for (p = 0; p < dev->limits.num_ports; ++p)
330 for (q = 0; q <= 1; ++q)
331 if (dev->send_agent[p][q])
332 ib_unregister_mad_agent(dev->send_agent[p][q]);
333
334 return ret;
335}
336
337void mthca_free_agents(struct mthca_dev *dev)
338{
339 struct ib_mad_agent *agent;
340 int p, q;
341
342 for (p = 0; p < dev->limits.num_ports; ++p) {
343 for (q = 0; q <= 1; ++q) {
344 agent = dev->send_agent[p][q];
345 dev->send_agent[p][q] = NULL;
346 ib_unregister_mad_agent(agent);
347 }
348
349 if (dev->sm_ah[p])
350 rdma_destroy_ah(dev->sm_ah[p],
351 RDMA_DESTROY_AH_SLEEPABLE);
352 }
353}