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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 | ||
1da177e4 LT |
52 | static void update_sm_ah(struct mthca_dev *dev, |
53 | u8 port_num, u16 lid, u8 sl) | |
54 | { | |
55 | struct ib_ah *new_ah; | |
56 | struct ib_ah_attr ah_attr; | |
57 | unsigned long flags; | |
58 | ||
59 | if (!dev->send_agent[port_num - 1][0]) | |
60 | return; | |
61 | ||
62 | memset(&ah_attr, 0, sizeof ah_attr); | |
63 | ah_attr.dlid = lid; | |
64 | ah_attr.sl = sl; | |
65 | ah_attr.port_num = port_num; | |
66 | ||
67 | new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd, | |
68 | &ah_attr); | |
69 | if (IS_ERR(new_ah)) | |
70 | return; | |
71 | ||
72 | spin_lock_irqsave(&dev->sm_lock, flags); | |
73 | if (dev->sm_ah[port_num - 1]) | |
74 | ib_destroy_ah(dev->sm_ah[port_num - 1]); | |
75 | dev->sm_ah[port_num - 1] = new_ah; | |
76 | spin_unlock_irqrestore(&dev->sm_lock, flags); | |
77 | } | |
78 | ||
79 | /* | |
80 | * Snoop SM MADs for port info and P_Key table sets, so we can | |
81 | * synthesize LID change and P_Key change events. | |
82 | */ | |
83 | static void smp_snoop(struct ib_device *ibdev, | |
84 | u8 port_num, | |
85 | struct ib_mad *mad) | |
86 | { | |
87 | struct ib_event event; | |
88 | ||
89 | if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || | |
90 | mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && | |
91 | mad->mad_hdr.method == IB_MGMT_METHOD_SET) { | |
92 | if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) { | |
93 | update_sm_ah(to_mdev(ibdev), port_num, | |
94 | be16_to_cpup((__be16 *) (mad->data + 58)), | |
95 | (*(u8 *) (mad->data + 76)) & 0xf); | |
96 | ||
97 | event.device = ibdev; | |
98 | event.event = IB_EVENT_LID_CHANGE; | |
99 | event.element.port_num = port_num; | |
100 | ib_dispatch_event(&event); | |
101 | } | |
102 | ||
103 | if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) { | |
104 | event.device = ibdev; | |
105 | event.event = IB_EVENT_PKEY_CHANGE; | |
106 | event.element.port_num = port_num; | |
107 | ib_dispatch_event(&event); | |
108 | } | |
109 | } | |
110 | } | |
111 | ||
112 | static void forward_trap(struct mthca_dev *dev, | |
113 | u8 port_num, | |
114 | struct ib_mad *mad) | |
115 | { | |
116 | int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED; | |
34816ad9 | 117 | struct ib_mad_send_buf *send_buf; |
1da177e4 LT |
118 | struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn]; |
119 | int ret; | |
120 | unsigned long flags; | |
121 | ||
122 | if (agent) { | |
34816ad9 SH |
123 | send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR, |
124 | IB_MGMT_MAD_DATA, GFP_ATOMIC); | |
1da177e4 LT |
125 | /* |
126 | * We rely here on the fact that MLX QPs don't use the | |
127 | * address handle after the send is posted (this is | |
128 | * wrong following the IB spec strictly, but we know | |
129 | * it's OK for our devices). | |
130 | */ | |
131 | spin_lock_irqsave(&dev->sm_lock, flags); | |
34816ad9 SH |
132 | memcpy(send_buf->mad, mad, sizeof *mad); |
133 | if ((send_buf->ah = dev->sm_ah[port_num - 1])) | |
134 | ret = ib_post_send_mad(send_buf, NULL); | |
1da177e4 LT |
135 | else |
136 | ret = -EINVAL; | |
137 | spin_unlock_irqrestore(&dev->sm_lock, flags); | |
138 | ||
34816ad9 SH |
139 | if (ret) |
140 | ib_free_send_mad(send_buf); | |
1da177e4 LT |
141 | } |
142 | } | |
143 | ||
144 | int mthca_process_mad(struct ib_device *ibdev, | |
145 | int mad_flags, | |
146 | u8 port_num, | |
147 | struct ib_wc *in_wc, | |
148 | struct ib_grh *in_grh, | |
149 | struct ib_mad *in_mad, | |
150 | struct ib_mad *out_mad) | |
151 | { | |
152 | int err; | |
153 | u8 status; | |
97f52eb4 | 154 | u16 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE); |
1da177e4 LT |
155 | |
156 | /* Forward locally generated traps to the SM */ | |
157 | if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && | |
158 | slid == 0) { | |
159 | forward_trap(to_mdev(ibdev), port_num, in_mad); | |
160 | return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; | |
161 | } | |
162 | ||
163 | /* | |
164 | * Only handle SM gets, sets and trap represses for SM class | |
165 | * | |
166 | * Only handle PMA and Mellanox vendor-specific class gets and | |
167 | * sets for other classes. | |
168 | */ | |
169 | if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || | |
170 | in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
171 | if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && | |
172 | in_mad->mad_hdr.method != IB_MGMT_METHOD_SET && | |
173 | in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS) | |
174 | return IB_MAD_RESULT_SUCCESS; | |
175 | ||
176 | /* | |
177 | * Don't process SMInfo queries or vendor-specific | |
178 | * MADs -- the SMA can't handle them. | |
179 | */ | |
180 | if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO || | |
181 | ((in_mad->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) == | |
182 | IB_SMP_ATTR_VENDOR_MASK)) | |
183 | return IB_MAD_RESULT_SUCCESS; | |
184 | } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT || | |
185 | in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS1 || | |
186 | in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS2) { | |
187 | if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && | |
188 | in_mad->mad_hdr.method != IB_MGMT_METHOD_SET) | |
189 | return IB_MAD_RESULT_SUCCESS; | |
190 | } else | |
191 | return IB_MAD_RESULT_SUCCESS; | |
192 | ||
193 | err = mthca_MAD_IFC(to_mdev(ibdev), | |
194 | mad_flags & IB_MAD_IGNORE_MKEY, | |
195 | mad_flags & IB_MAD_IGNORE_BKEY, | |
196 | port_num, in_wc, in_grh, in_mad, out_mad, | |
197 | &status); | |
198 | if (err) { | |
199 | mthca_err(to_mdev(ibdev), "MAD_IFC failed\n"); | |
200 | return IB_MAD_RESULT_FAILURE; | |
201 | } | |
202 | if (status == MTHCA_CMD_STAT_BAD_PKT) | |
203 | return IB_MAD_RESULT_SUCCESS; | |
204 | if (status) { | |
205 | mthca_err(to_mdev(ibdev), "MAD_IFC returned status %02x\n", | |
206 | status); | |
207 | return IB_MAD_RESULT_FAILURE; | |
208 | } | |
209 | ||
210 | if (!out_mad->mad_hdr.status) | |
211 | smp_snoop(ibdev, port_num, in_mad); | |
212 | ||
213 | /* set return bit in status of directed route responses */ | |
214 | if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) | |
215 | out_mad->mad_hdr.status |= cpu_to_be16(1 << 15); | |
216 | ||
217 | if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) | |
218 | /* no response for trap repress */ | |
219 | return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; | |
220 | ||
221 | return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; | |
222 | } | |
223 | ||
224 | static void send_handler(struct ib_mad_agent *agent, | |
225 | struct ib_mad_send_wc *mad_send_wc) | |
226 | { | |
34816ad9 | 227 | ib_free_send_mad(mad_send_wc->send_buf); |
1da177e4 LT |
228 | } |
229 | ||
230 | int mthca_create_agents(struct mthca_dev *dev) | |
231 | { | |
232 | struct ib_mad_agent *agent; | |
233 | int p, q; | |
234 | ||
235 | spin_lock_init(&dev->sm_lock); | |
236 | ||
237 | for (p = 0; p < dev->limits.num_ports; ++p) | |
238 | for (q = 0; q <= 1; ++q) { | |
239 | agent = ib_register_mad_agent(&dev->ib_dev, p + 1, | |
240 | q ? IB_QPT_GSI : IB_QPT_SMI, | |
241 | NULL, 0, send_handler, | |
242 | NULL, NULL); | |
243 | if (IS_ERR(agent)) | |
244 | goto err; | |
245 | dev->send_agent[p][q] = agent; | |
246 | } | |
247 | ||
248 | return 0; | |
249 | ||
250 | err: | |
251 | for (p = 0; p < dev->limits.num_ports; ++p) | |
252 | for (q = 0; q <= 1; ++q) | |
253 | if (dev->send_agent[p][q]) | |
254 | ib_unregister_mad_agent(dev->send_agent[p][q]); | |
255 | ||
256 | return PTR_ERR(agent); | |
257 | } | |
258 | ||
259 | void mthca_free_agents(struct mthca_dev *dev) | |
260 | { | |
261 | struct ib_mad_agent *agent; | |
262 | int p, q; | |
263 | ||
264 | for (p = 0; p < dev->limits.num_ports; ++p) { | |
265 | for (q = 0; q <= 1; ++q) { | |
266 | agent = dev->send_agent[p][q]; | |
267 | dev->send_agent[p][q] = NULL; | |
268 | ib_unregister_mad_agent(agent); | |
269 | } | |
270 | ||
271 | if (dev->sm_ah[p]) | |
272 | ib_destroy_ah(dev->sm_ah[p]); | |
273 | } | |
274 | } |