Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2004 Topspin Communications. All rights reserved. | |
2a1d9b7f RD |
3 | * Copyright (c) 2005 Mellanox Technologies. All rights reserved. |
4 | * Copyright (c) 2004 Voltaire, Inc. All rights reserved. | |
1da177e4 LT |
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. | |
1da177e4 LT |
33 | */ |
34 | ||
4e57b681 TS |
35 | #include <linux/string.h> |
36 | #include <linux/slab.h> | |
37 | ||
a4d61e84 RD |
38 | #include <rdma/ib_verbs.h> |
39 | #include <rdma/ib_mad.h> | |
40 | #include <rdma/ib_smi.h> | |
1da177e4 LT |
41 | |
42 | #include "mthca_dev.h" | |
43 | #include "mthca_cmd.h" | |
44 | ||
45 | enum { | |
46 | MTHCA_VENDOR_CLASS1 = 0x9, | |
47 | MTHCA_VENDOR_CLASS2 = 0xa | |
48 | }; | |
49 | ||
415dcd95 | 50 | static int mthca_update_rate(struct mthca_dev *dev, u8 port_num) |
bf6a9e31 JM |
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 | ||
69 | out: | |
70 | kfree(tprops); | |
71 | return ret; | |
72 | } | |
73 | ||
1da177e4 LT |
74 | static 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 | */ | |
105 | static void smp_snoop(struct ib_device *ibdev, | |
106 | u8 port_num, | |
270b8b85 MS |
107 | struct ib_mad *mad, |
108 | u16 prev_lid) | |
1da177e4 LT |
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) { | |
12bbb2b7 LA |
116 | struct ib_port_info *pinfo = |
117 | (struct ib_port_info *) ((struct ib_smp *) mad)->data; | |
270b8b85 | 118 | u16 lid = be16_to_cpu(pinfo->lid); |
12bbb2b7 | 119 | |
bf6a9e31 | 120 | mthca_update_rate(to_mdev(ibdev), port_num); |
1da177e4 | 121 | update_sm_ah(to_mdev(ibdev), port_num, |
b2707573 | 122 | be16_to_cpu(pinfo->sm_lid), |
12bbb2b7 | 123 | pinfo->neighbormtu_mastersmsl & 0xf); |
1da177e4 LT |
124 | |
125 | event.device = ibdev; | |
1da177e4 | 126 | event.element.port_num = port_num; |
12bbb2b7 | 127 | |
270b8b85 | 128 | if (pinfo->clientrereg_resv_subnetto & 0x80) { |
12bbb2b7 | 129 | event.event = IB_EVENT_CLIENT_REREGISTER; |
270b8b85 MS |
130 | ib_dispatch_event(&event); |
131 | } | |
12bbb2b7 | 132 | |
270b8b85 MS |
133 | if (prev_lid != lid) { |
134 | event.event = IB_EVENT_LID_CHANGE; | |
135 | ib_dispatch_event(&event); | |
136 | } | |
1da177e4 LT |
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 | ||
6dfc3901 RD |
148 | static 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 | ||
1da177e4 LT |
161 | static 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; | |
34816ad9 | 166 | struct ib_mad_send_buf *send_buf; |
1da177e4 LT |
167 | struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn]; |
168 | int ret; | |
169 | unsigned long flags; | |
170 | ||
171 | if (agent) { | |
34816ad9 SH |
172 | send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR, |
173 | IB_MGMT_MAD_DATA, GFP_ATOMIC); | |
d0444f15 DC |
174 | if (IS_ERR(send_buf)) |
175 | return; | |
1da177e4 LT |
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); | |
34816ad9 SH |
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); | |
1da177e4 LT |
186 | else |
187 | ret = -EINVAL; | |
188 | spin_unlock_irqrestore(&dev->sm_lock, flags); | |
189 | ||
34816ad9 SH |
190 | if (ret) |
191 | ib_free_send_mad(send_buf); | |
1da177e4 LT |
192 | } |
193 | } | |
194 | ||
195 | int 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; | |
97f52eb4 | 204 | u16 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE); |
270b8b85 MS |
205 | u16 prev_lid = 0; |
206 | struct ib_port_attr pattr; | |
1da177e4 LT |
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; | |
270b8b85 MS |
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; | |
1da177e4 LT |
250 | |
251 | err = mthca_MAD_IFC(to_mdev(ibdev), | |
252 | mad_flags & IB_MAD_IGNORE_MKEY, | |
253 | mad_flags & IB_MAD_IGNORE_BKEY, | |
cdb73db0 GR |
254 | port_num, in_wc, in_grh, in_mad, out_mad); |
255 | if (err == -EBADMSG) | |
1da177e4 | 256 | return IB_MAD_RESULT_SUCCESS; |
cdb73db0 GR |
257 | else if (err) { |
258 | mthca_err(to_mdev(ibdev), "MAD_IFC returned %d\n", err); | |
1da177e4 LT |
259 | return IB_MAD_RESULT_FAILURE; |
260 | } | |
261 | ||
6dfc3901 | 262 | if (!out_mad->mad_hdr.status) { |
270b8b85 | 263 | smp_snoop(ibdev, port_num, in_mad, prev_lid); |
6dfc3901 RD |
264 | node_desc_override(ibdev, out_mad); |
265 | } | |
1da177e4 LT |
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 | ||
278 | static void send_handler(struct ib_mad_agent *agent, | |
279 | struct ib_mad_send_wc *mad_send_wc) | |
280 | { | |
34816ad9 | 281 | ib_free_send_mad(mad_send_wc->send_buf); |
1da177e4 LT |
282 | } |
283 | ||
284 | int mthca_create_agents(struct mthca_dev *dev) | |
285 | { | |
286 | struct ib_mad_agent *agent; | |
287 | int p, q; | |
bf6a9e31 | 288 | int ret; |
1da177e4 LT |
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); | |
bf6a9e31 JM |
298 | if (IS_ERR(agent)) { |
299 | ret = PTR_ERR(agent); | |
1da177e4 | 300 | goto err; |
bf6a9e31 | 301 | } |
1da177e4 LT |
302 | dev->send_agent[p][q] = agent; |
303 | } | |
304 | ||
bf6a9e31 JM |
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 | ||
1da177e4 LT |
315 | return 0; |
316 | ||
317 | err: | |
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 | ||
bf6a9e31 | 323 | return ret; |
1da177e4 LT |
324 | } |
325 | ||
f4f3d0f0 | 326 | void mthca_free_agents(struct mthca_dev *dev) |
1da177e4 LT |
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 | } |