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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 | ||
37 | #include <ib_verbs.h> | |
38 | #include <ib_mad.h> | |
39 | #include <ib_smi.h> | |
40 | ||
41 | #include "mthca_dev.h" | |
42 | #include "mthca_cmd.h" | |
43 | ||
44 | enum { | |
45 | MTHCA_VENDOR_CLASS1 = 0x9, | |
46 | MTHCA_VENDOR_CLASS2 = 0xa | |
47 | }; | |
48 | ||
49 | struct mthca_trap_mad { | |
50 | struct ib_mad *mad; | |
51 | DECLARE_PCI_UNMAP_ADDR(mapping) | |
52 | }; | |
53 | ||
54 | static void update_sm_ah(struct mthca_dev *dev, | |
55 | u8 port_num, u16 lid, u8 sl) | |
56 | { | |
57 | struct ib_ah *new_ah; | |
58 | struct ib_ah_attr ah_attr; | |
59 | unsigned long flags; | |
60 | ||
61 | if (!dev->send_agent[port_num - 1][0]) | |
62 | return; | |
63 | ||
64 | memset(&ah_attr, 0, sizeof ah_attr); | |
65 | ah_attr.dlid = lid; | |
66 | ah_attr.sl = sl; | |
67 | ah_attr.port_num = port_num; | |
68 | ||
69 | new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd, | |
70 | &ah_attr); | |
71 | if (IS_ERR(new_ah)) | |
72 | return; | |
73 | ||
74 | spin_lock_irqsave(&dev->sm_lock, flags); | |
75 | if (dev->sm_ah[port_num - 1]) | |
76 | ib_destroy_ah(dev->sm_ah[port_num - 1]); | |
77 | dev->sm_ah[port_num - 1] = new_ah; | |
78 | spin_unlock_irqrestore(&dev->sm_lock, flags); | |
79 | } | |
80 | ||
81 | /* | |
82 | * Snoop SM MADs for port info and P_Key table sets, so we can | |
83 | * synthesize LID change and P_Key change events. | |
84 | */ | |
85 | static void smp_snoop(struct ib_device *ibdev, | |
86 | u8 port_num, | |
87 | struct ib_mad *mad) | |
88 | { | |
89 | struct ib_event event; | |
90 | ||
91 | if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || | |
92 | mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && | |
93 | mad->mad_hdr.method == IB_MGMT_METHOD_SET) { | |
94 | if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) { | |
95 | update_sm_ah(to_mdev(ibdev), port_num, | |
96 | be16_to_cpup((__be16 *) (mad->data + 58)), | |
97 | (*(u8 *) (mad->data + 76)) & 0xf); | |
98 | ||
99 | event.device = ibdev; | |
100 | event.event = IB_EVENT_LID_CHANGE; | |
101 | event.element.port_num = port_num; | |
102 | ib_dispatch_event(&event); | |
103 | } | |
104 | ||
105 | if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) { | |
106 | event.device = ibdev; | |
107 | event.event = IB_EVENT_PKEY_CHANGE; | |
108 | event.element.port_num = port_num; | |
109 | ib_dispatch_event(&event); | |
110 | } | |
111 | } | |
112 | } | |
113 | ||
114 | static void forward_trap(struct mthca_dev *dev, | |
115 | u8 port_num, | |
116 | struct ib_mad *mad) | |
117 | { | |
118 | int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED; | |
119 | struct mthca_trap_mad *tmad; | |
120 | struct ib_sge gather_list; | |
121 | struct ib_send_wr *bad_wr, wr = { | |
122 | .opcode = IB_WR_SEND, | |
123 | .sg_list = &gather_list, | |
124 | .num_sge = 1, | |
125 | .send_flags = IB_SEND_SIGNALED, | |
126 | .wr = { | |
127 | .ud = { | |
128 | .remote_qpn = qpn, | |
129 | .remote_qkey = qpn ? IB_QP1_QKEY : 0, | |
130 | .timeout_ms = 0 | |
131 | } | |
132 | } | |
133 | }; | |
134 | struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn]; | |
135 | int ret; | |
136 | unsigned long flags; | |
137 | ||
138 | if (agent) { | |
139 | tmad = kmalloc(sizeof *tmad, GFP_KERNEL); | |
140 | if (!tmad) | |
141 | return; | |
142 | ||
143 | tmad->mad = kmalloc(sizeof *tmad->mad, GFP_KERNEL); | |
144 | if (!tmad->mad) { | |
145 | kfree(tmad); | |
146 | return; | |
147 | } | |
148 | ||
149 | memcpy(tmad->mad, mad, sizeof *mad); | |
150 | ||
151 | wr.wr.ud.mad_hdr = &tmad->mad->mad_hdr; | |
152 | wr.wr_id = (unsigned long) tmad; | |
153 | ||
154 | gather_list.addr = dma_map_single(agent->device->dma_device, | |
155 | tmad->mad, | |
156 | sizeof *tmad->mad, | |
157 | DMA_TO_DEVICE); | |
158 | gather_list.length = sizeof *tmad->mad; | |
159 | gather_list.lkey = to_mpd(agent->qp->pd)->ntmr.ibmr.lkey; | |
160 | pci_unmap_addr_set(tmad, mapping, gather_list.addr); | |
161 | ||
162 | /* | |
163 | * We rely here on the fact that MLX QPs don't use the | |
164 | * address handle after the send is posted (this is | |
165 | * wrong following the IB spec strictly, but we know | |
166 | * it's OK for our devices). | |
167 | */ | |
168 | spin_lock_irqsave(&dev->sm_lock, flags); | |
169 | wr.wr.ud.ah = dev->sm_ah[port_num - 1]; | |
170 | if (wr.wr.ud.ah) | |
171 | ret = ib_post_send_mad(agent, &wr, &bad_wr); | |
172 | else | |
173 | ret = -EINVAL; | |
174 | spin_unlock_irqrestore(&dev->sm_lock, flags); | |
175 | ||
176 | if (ret) { | |
177 | dma_unmap_single(agent->device->dma_device, | |
178 | pci_unmap_addr(tmad, mapping), | |
179 | sizeof *tmad->mad, | |
180 | DMA_TO_DEVICE); | |
181 | kfree(tmad->mad); | |
182 | kfree(tmad); | |
183 | } | |
184 | } | |
185 | } | |
186 | ||
187 | int mthca_process_mad(struct ib_device *ibdev, | |
188 | int mad_flags, | |
189 | u8 port_num, | |
190 | struct ib_wc *in_wc, | |
191 | struct ib_grh *in_grh, | |
192 | struct ib_mad *in_mad, | |
193 | struct ib_mad *out_mad) | |
194 | { | |
195 | int err; | |
196 | u8 status; | |
97f52eb4 | 197 | u16 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE); |
1da177e4 LT |
198 | |
199 | /* Forward locally generated traps to the SM */ | |
200 | if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && | |
201 | slid == 0) { | |
202 | forward_trap(to_mdev(ibdev), port_num, in_mad); | |
203 | return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; | |
204 | } | |
205 | ||
206 | /* | |
207 | * Only handle SM gets, sets and trap represses for SM class | |
208 | * | |
209 | * Only handle PMA and Mellanox vendor-specific class gets and | |
210 | * sets for other classes. | |
211 | */ | |
212 | if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || | |
213 | in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
214 | if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && | |
215 | in_mad->mad_hdr.method != IB_MGMT_METHOD_SET && | |
216 | in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS) | |
217 | return IB_MAD_RESULT_SUCCESS; | |
218 | ||
219 | /* | |
220 | * Don't process SMInfo queries or vendor-specific | |
221 | * MADs -- the SMA can't handle them. | |
222 | */ | |
223 | if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO || | |
224 | ((in_mad->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) == | |
225 | IB_SMP_ATTR_VENDOR_MASK)) | |
226 | return IB_MAD_RESULT_SUCCESS; | |
227 | } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT || | |
228 | in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS1 || | |
229 | in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS2) { | |
230 | if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && | |
231 | in_mad->mad_hdr.method != IB_MGMT_METHOD_SET) | |
232 | return IB_MAD_RESULT_SUCCESS; | |
233 | } else | |
234 | return IB_MAD_RESULT_SUCCESS; | |
235 | ||
236 | err = mthca_MAD_IFC(to_mdev(ibdev), | |
237 | mad_flags & IB_MAD_IGNORE_MKEY, | |
238 | mad_flags & IB_MAD_IGNORE_BKEY, | |
239 | port_num, in_wc, in_grh, in_mad, out_mad, | |
240 | &status); | |
241 | if (err) { | |
242 | mthca_err(to_mdev(ibdev), "MAD_IFC failed\n"); | |
243 | return IB_MAD_RESULT_FAILURE; | |
244 | } | |
245 | if (status == MTHCA_CMD_STAT_BAD_PKT) | |
246 | return IB_MAD_RESULT_SUCCESS; | |
247 | if (status) { | |
248 | mthca_err(to_mdev(ibdev), "MAD_IFC returned status %02x\n", | |
249 | status); | |
250 | return IB_MAD_RESULT_FAILURE; | |
251 | } | |
252 | ||
253 | if (!out_mad->mad_hdr.status) | |
254 | smp_snoop(ibdev, port_num, in_mad); | |
255 | ||
256 | /* set return bit in status of directed route responses */ | |
257 | if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) | |
258 | out_mad->mad_hdr.status |= cpu_to_be16(1 << 15); | |
259 | ||
260 | if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) | |
261 | /* no response for trap repress */ | |
262 | return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; | |
263 | ||
264 | return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; | |
265 | } | |
266 | ||
267 | static void send_handler(struct ib_mad_agent *agent, | |
268 | struct ib_mad_send_wc *mad_send_wc) | |
269 | { | |
270 | struct mthca_trap_mad *tmad = | |
271 | (void *) (unsigned long) mad_send_wc->wr_id; | |
272 | ||
273 | dma_unmap_single(agent->device->dma_device, | |
274 | pci_unmap_addr(tmad, mapping), | |
275 | sizeof *tmad->mad, | |
276 | DMA_TO_DEVICE); | |
277 | kfree(tmad->mad); | |
278 | kfree(tmad); | |
279 | } | |
280 | ||
281 | int mthca_create_agents(struct mthca_dev *dev) | |
282 | { | |
283 | struct ib_mad_agent *agent; | |
284 | int p, q; | |
285 | ||
286 | spin_lock_init(&dev->sm_lock); | |
287 | ||
288 | for (p = 0; p < dev->limits.num_ports; ++p) | |
289 | for (q = 0; q <= 1; ++q) { | |
290 | agent = ib_register_mad_agent(&dev->ib_dev, p + 1, | |
291 | q ? IB_QPT_GSI : IB_QPT_SMI, | |
292 | NULL, 0, send_handler, | |
293 | NULL, NULL); | |
294 | if (IS_ERR(agent)) | |
295 | goto err; | |
296 | dev->send_agent[p][q] = agent; | |
297 | } | |
298 | ||
299 | return 0; | |
300 | ||
301 | err: | |
302 | for (p = 0; p < dev->limits.num_ports; ++p) | |
303 | for (q = 0; q <= 1; ++q) | |
304 | if (dev->send_agent[p][q]) | |
305 | ib_unregister_mad_agent(dev->send_agent[p][q]); | |
306 | ||
307 | return PTR_ERR(agent); | |
308 | } | |
309 | ||
310 | void mthca_free_agents(struct mthca_dev *dev) | |
311 | { | |
312 | struct ib_mad_agent *agent; | |
313 | int p, q; | |
314 | ||
315 | for (p = 0; p < dev->limits.num_ports; ++p) { | |
316 | for (q = 0; q <= 1; ++q) { | |
317 | agent = dev->send_agent[p][q]; | |
318 | dev->send_agent[p][q] = NULL; | |
319 | ib_unregister_mad_agent(agent); | |
320 | } | |
321 | ||
322 | if (dev->sm_ah[p]) | |
323 | ib_destroy_ah(dev->sm_ah[p]); | |
324 | } | |
325 | } |