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. | |
33 | * | |
34 | * $Id: mthca_mad.c 1349 2004-12-16 21:09:43Z roland $ | |
35 | */ | |
36 | ||
4e57b681 TS |
37 | #include <linux/string.h> |
38 | #include <linux/slab.h> | |
39 | ||
a4d61e84 RD |
40 | #include <rdma/ib_verbs.h> |
41 | #include <rdma/ib_mad.h> | |
42 | #include <rdma/ib_smi.h> | |
1da177e4 LT |
43 | |
44 | #include "mthca_dev.h" | |
45 | #include "mthca_cmd.h" | |
46 | ||
47 | enum { | |
48 | MTHCA_VENDOR_CLASS1 = 0x9, | |
49 | MTHCA_VENDOR_CLASS2 = 0xa | |
50 | }; | |
51 | ||
415dcd95 | 52 | static int mthca_update_rate(struct mthca_dev *dev, u8 port_num) |
bf6a9e31 JM |
53 | { |
54 | struct ib_port_attr *tprops = NULL; | |
55 | int ret; | |
56 | ||
57 | tprops = kmalloc(sizeof *tprops, GFP_KERNEL); | |
58 | if (!tprops) | |
59 | return -ENOMEM; | |
60 | ||
61 | ret = ib_query_port(&dev->ib_dev, port_num, tprops); | |
62 | if (ret) { | |
63 | printk(KERN_WARNING "ib_query_port failed (%d) for %s port %d\n", | |
64 | ret, dev->ib_dev.name, port_num); | |
65 | goto out; | |
66 | } | |
67 | ||
68 | dev->rate[port_num - 1] = tprops->active_speed * | |
69 | ib_width_enum_to_int(tprops->active_width); | |
70 | ||
71 | out: | |
72 | kfree(tprops); | |
73 | return ret; | |
74 | } | |
75 | ||
1da177e4 LT |
76 | static void update_sm_ah(struct mthca_dev *dev, |
77 | u8 port_num, u16 lid, u8 sl) | |
78 | { | |
79 | struct ib_ah *new_ah; | |
80 | struct ib_ah_attr ah_attr; | |
81 | unsigned long flags; | |
82 | ||
83 | if (!dev->send_agent[port_num - 1][0]) | |
84 | return; | |
85 | ||
86 | memset(&ah_attr, 0, sizeof ah_attr); | |
87 | ah_attr.dlid = lid; | |
88 | ah_attr.sl = sl; | |
89 | ah_attr.port_num = port_num; | |
90 | ||
91 | new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd, | |
92 | &ah_attr); | |
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 | ib_destroy_ah(dev->sm_ah[port_num - 1]); | |
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 | */ | |
107 | static void smp_snoop(struct ib_device *ibdev, | |
108 | u8 port_num, | |
109 | struct ib_mad *mad) | |
110 | { | |
111 | struct ib_event event; | |
112 | ||
113 | if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || | |
114 | mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && | |
115 | mad->mad_hdr.method == IB_MGMT_METHOD_SET) { | |
116 | if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) { | |
bf6a9e31 | 117 | mthca_update_rate(to_mdev(ibdev), port_num); |
1da177e4 LT |
118 | update_sm_ah(to_mdev(ibdev), port_num, |
119 | be16_to_cpup((__be16 *) (mad->data + 58)), | |
120 | (*(u8 *) (mad->data + 76)) & 0xf); | |
121 | ||
122 | event.device = ibdev; | |
123 | event.event = IB_EVENT_LID_CHANGE; | |
124 | event.element.port_num = port_num; | |
125 | ib_dispatch_event(&event); | |
126 | } | |
127 | ||
128 | if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) { | |
129 | event.device = ibdev; | |
130 | event.event = IB_EVENT_PKEY_CHANGE; | |
131 | event.element.port_num = port_num; | |
132 | ib_dispatch_event(&event); | |
133 | } | |
134 | } | |
135 | } | |
136 | ||
6dfc3901 RD |
137 | static void node_desc_override(struct ib_device *dev, |
138 | struct ib_mad *mad) | |
139 | { | |
140 | if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || | |
141 | mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && | |
142 | mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP && | |
143 | mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) { | |
144 | mutex_lock(&to_mdev(dev)->cap_mask_mutex); | |
145 | memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64); | |
146 | mutex_unlock(&to_mdev(dev)->cap_mask_mutex); | |
147 | } | |
148 | } | |
149 | ||
1da177e4 LT |
150 | static void forward_trap(struct mthca_dev *dev, |
151 | u8 port_num, | |
152 | struct ib_mad *mad) | |
153 | { | |
154 | int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED; | |
34816ad9 | 155 | struct ib_mad_send_buf *send_buf; |
1da177e4 LT |
156 | struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn]; |
157 | int ret; | |
158 | unsigned long flags; | |
159 | ||
160 | if (agent) { | |
34816ad9 SH |
161 | send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR, |
162 | IB_MGMT_MAD_DATA, GFP_ATOMIC); | |
1da177e4 LT |
163 | /* |
164 | * We rely here on the fact that MLX QPs don't use the | |
165 | * address handle after the send is posted (this is | |
166 | * wrong following the IB spec strictly, but we know | |
167 | * it's OK for our devices). | |
168 | */ | |
169 | spin_lock_irqsave(&dev->sm_lock, flags); | |
34816ad9 SH |
170 | memcpy(send_buf->mad, mad, sizeof *mad); |
171 | if ((send_buf->ah = dev->sm_ah[port_num - 1])) | |
172 | ret = ib_post_send_mad(send_buf, NULL); | |
1da177e4 LT |
173 | else |
174 | ret = -EINVAL; | |
175 | spin_unlock_irqrestore(&dev->sm_lock, flags); | |
176 | ||
34816ad9 SH |
177 | if (ret) |
178 | ib_free_send_mad(send_buf); | |
1da177e4 LT |
179 | } |
180 | } | |
181 | ||
182 | int mthca_process_mad(struct ib_device *ibdev, | |
183 | int mad_flags, | |
184 | u8 port_num, | |
185 | struct ib_wc *in_wc, | |
186 | struct ib_grh *in_grh, | |
187 | struct ib_mad *in_mad, | |
188 | struct ib_mad *out_mad) | |
189 | { | |
190 | int err; | |
191 | u8 status; | |
97f52eb4 | 192 | u16 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE); |
1da177e4 LT |
193 | |
194 | /* Forward locally generated traps to the SM */ | |
195 | if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && | |
196 | slid == 0) { | |
197 | forward_trap(to_mdev(ibdev), port_num, in_mad); | |
198 | return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; | |
199 | } | |
200 | ||
201 | /* | |
202 | * Only handle SM gets, sets and trap represses for SM class | |
203 | * | |
204 | * Only handle PMA and Mellanox vendor-specific class gets and | |
205 | * sets for other classes. | |
206 | */ | |
207 | if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || | |
208 | in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
209 | if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && | |
210 | in_mad->mad_hdr.method != IB_MGMT_METHOD_SET && | |
211 | in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS) | |
212 | return IB_MAD_RESULT_SUCCESS; | |
213 | ||
214 | /* | |
215 | * Don't process SMInfo queries or vendor-specific | |
216 | * MADs -- the SMA can't handle them. | |
217 | */ | |
218 | if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO || | |
219 | ((in_mad->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) == | |
220 | IB_SMP_ATTR_VENDOR_MASK)) | |
221 | return IB_MAD_RESULT_SUCCESS; | |
222 | } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT || | |
223 | in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS1 || | |
224 | in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS2) { | |
225 | if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && | |
226 | in_mad->mad_hdr.method != IB_MGMT_METHOD_SET) | |
227 | return IB_MAD_RESULT_SUCCESS; | |
228 | } else | |
229 | return IB_MAD_RESULT_SUCCESS; | |
230 | ||
231 | err = mthca_MAD_IFC(to_mdev(ibdev), | |
232 | mad_flags & IB_MAD_IGNORE_MKEY, | |
233 | mad_flags & IB_MAD_IGNORE_BKEY, | |
234 | port_num, in_wc, in_grh, in_mad, out_mad, | |
235 | &status); | |
236 | if (err) { | |
237 | mthca_err(to_mdev(ibdev), "MAD_IFC failed\n"); | |
238 | return IB_MAD_RESULT_FAILURE; | |
239 | } | |
240 | if (status == MTHCA_CMD_STAT_BAD_PKT) | |
241 | return IB_MAD_RESULT_SUCCESS; | |
242 | if (status) { | |
243 | mthca_err(to_mdev(ibdev), "MAD_IFC returned status %02x\n", | |
244 | status); | |
245 | return IB_MAD_RESULT_FAILURE; | |
246 | } | |
247 | ||
6dfc3901 | 248 | if (!out_mad->mad_hdr.status) { |
1da177e4 | 249 | smp_snoop(ibdev, port_num, in_mad); |
6dfc3901 RD |
250 | node_desc_override(ibdev, out_mad); |
251 | } | |
1da177e4 LT |
252 | |
253 | /* set return bit in status of directed route responses */ | |
254 | if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) | |
255 | out_mad->mad_hdr.status |= cpu_to_be16(1 << 15); | |
256 | ||
257 | if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) | |
258 | /* no response for trap repress */ | |
259 | return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; | |
260 | ||
261 | return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; | |
262 | } | |
263 | ||
264 | static void send_handler(struct ib_mad_agent *agent, | |
265 | struct ib_mad_send_wc *mad_send_wc) | |
266 | { | |
34816ad9 | 267 | ib_free_send_mad(mad_send_wc->send_buf); |
1da177e4 LT |
268 | } |
269 | ||
270 | int mthca_create_agents(struct mthca_dev *dev) | |
271 | { | |
272 | struct ib_mad_agent *agent; | |
273 | int p, q; | |
bf6a9e31 | 274 | int ret; |
1da177e4 LT |
275 | |
276 | spin_lock_init(&dev->sm_lock); | |
277 | ||
278 | for (p = 0; p < dev->limits.num_ports; ++p) | |
279 | for (q = 0; q <= 1; ++q) { | |
280 | agent = ib_register_mad_agent(&dev->ib_dev, p + 1, | |
281 | q ? IB_QPT_GSI : IB_QPT_SMI, | |
282 | NULL, 0, send_handler, | |
283 | NULL, NULL); | |
bf6a9e31 JM |
284 | if (IS_ERR(agent)) { |
285 | ret = PTR_ERR(agent); | |
1da177e4 | 286 | goto err; |
bf6a9e31 | 287 | } |
1da177e4 LT |
288 | dev->send_agent[p][q] = agent; |
289 | } | |
290 | ||
bf6a9e31 JM |
291 | |
292 | for (p = 1; p <= dev->limits.num_ports; ++p) { | |
293 | ret = mthca_update_rate(dev, p); | |
294 | if (ret) { | |
295 | mthca_err(dev, "Failed to obtain port %d rate." | |
296 | " aborting.\n", p); | |
297 | goto err; | |
298 | } | |
299 | } | |
300 | ||
1da177e4 LT |
301 | return 0; |
302 | ||
303 | err: | |
304 | for (p = 0; p < dev->limits.num_ports; ++p) | |
305 | for (q = 0; q <= 1; ++q) | |
306 | if (dev->send_agent[p][q]) | |
307 | ib_unregister_mad_agent(dev->send_agent[p][q]); | |
308 | ||
bf6a9e31 | 309 | return ret; |
1da177e4 LT |
310 | } |
311 | ||
e1f7868c | 312 | void __devexit mthca_free_agents(struct mthca_dev *dev) |
1da177e4 LT |
313 | { |
314 | struct ib_mad_agent *agent; | |
315 | int p, q; | |
316 | ||
317 | for (p = 0; p < dev->limits.num_ports; ++p) { | |
318 | for (q = 0; q <= 1; ++q) { | |
319 | agent = dev->send_agent[p][q]; | |
320 | dev->send_agent[p][q] = NULL; | |
321 | ib_unregister_mad_agent(agent); | |
322 | } | |
323 | ||
324 | if (dev->sm_ah[p]) | |
325 | ib_destroy_ah(dev->sm_ah[p]); | |
326 | } | |
327 | } |