]>
Commit | Line | Data |
---|---|---|
225c7b1f RD |
1 | /* |
2 | * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved. | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | */ | |
32 | ||
33 | #include <rdma/ib_mad.h> | |
34 | #include <rdma/ib_smi.h> | |
35 | ||
36 | #include <linux/mlx4/cmd.h> | |
5a0e3ad6 | 37 | #include <linux/gfp.h> |
225c7b1f RD |
38 | |
39 | #include "mlx4_ib.h" | |
40 | ||
41 | enum { | |
42 | MLX4_IB_VENDOR_CLASS1 = 0x9, | |
43 | MLX4_IB_VENDOR_CLASS2 = 0xa | |
44 | }; | |
45 | ||
46 | int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int ignore_mkey, int ignore_bkey, | |
47 | int port, struct ib_wc *in_wc, struct ib_grh *in_grh, | |
48 | void *in_mad, void *response_mad) | |
49 | { | |
50 | struct mlx4_cmd_mailbox *inmailbox, *outmailbox; | |
51 | void *inbox; | |
52 | int err; | |
53 | u32 in_modifier = port; | |
54 | u8 op_modifier = 0; | |
55 | ||
56 | inmailbox = mlx4_alloc_cmd_mailbox(dev->dev); | |
57 | if (IS_ERR(inmailbox)) | |
58 | return PTR_ERR(inmailbox); | |
59 | inbox = inmailbox->buf; | |
60 | ||
61 | outmailbox = mlx4_alloc_cmd_mailbox(dev->dev); | |
62 | if (IS_ERR(outmailbox)) { | |
63 | mlx4_free_cmd_mailbox(dev->dev, inmailbox); | |
64 | return PTR_ERR(outmailbox); | |
65 | } | |
66 | ||
67 | memcpy(inbox, in_mad, 256); | |
68 | ||
69 | /* | |
70 | * Key check traps can't be generated unless we have in_wc to | |
71 | * tell us where to send the trap. | |
72 | */ | |
73 | if (ignore_mkey || !in_wc) | |
74 | op_modifier |= 0x1; | |
75 | if (ignore_bkey || !in_wc) | |
76 | op_modifier |= 0x2; | |
77 | ||
78 | if (in_wc) { | |
79 | struct { | |
80 | __be32 my_qpn; | |
81 | u32 reserved1; | |
82 | __be32 rqpn; | |
83 | u8 sl; | |
84 | u8 g_path; | |
85 | u16 reserved2[2]; | |
86 | __be16 pkey; | |
87 | u32 reserved3[11]; | |
88 | u8 grh[40]; | |
89 | } *ext_info; | |
90 | ||
91 | memset(inbox + 256, 0, 256); | |
92 | ext_info = inbox + 256; | |
93 | ||
94 | ext_info->my_qpn = cpu_to_be32(in_wc->qp->qp_num); | |
95 | ext_info->rqpn = cpu_to_be32(in_wc->src_qp); | |
96 | ext_info->sl = in_wc->sl << 4; | |
97 | ext_info->g_path = in_wc->dlid_path_bits | | |
98 | (in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0); | |
99 | ext_info->pkey = cpu_to_be16(in_wc->pkey_index); | |
100 | ||
101 | if (in_grh) | |
102 | memcpy(ext_info->grh, in_grh, 40); | |
103 | ||
104 | op_modifier |= 0x4; | |
105 | ||
106 | in_modifier |= in_wc->slid << 16; | |
107 | } | |
108 | ||
109 | err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma, | |
110 | in_modifier, op_modifier, | |
111 | MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C); | |
112 | ||
fe11cb6b | 113 | if (!err) |
225c7b1f RD |
114 | memcpy(response_mad, outmailbox->buf, 256); |
115 | ||
116 | mlx4_free_cmd_mailbox(dev->dev, inmailbox); | |
117 | mlx4_free_cmd_mailbox(dev->dev, outmailbox); | |
118 | ||
119 | return err; | |
120 | } | |
121 | ||
122 | static void update_sm_ah(struct mlx4_ib_dev *dev, u8 port_num, u16 lid, u8 sl) | |
123 | { | |
124 | struct ib_ah *new_ah; | |
125 | struct ib_ah_attr ah_attr; | |
126 | ||
127 | if (!dev->send_agent[port_num - 1][0]) | |
128 | return; | |
129 | ||
130 | memset(&ah_attr, 0, sizeof ah_attr); | |
131 | ah_attr.dlid = lid; | |
132 | ah_attr.sl = sl; | |
133 | ah_attr.port_num = port_num; | |
134 | ||
135 | new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd, | |
136 | &ah_attr); | |
137 | if (IS_ERR(new_ah)) | |
138 | return; | |
139 | ||
140 | spin_lock(&dev->sm_lock); | |
141 | if (dev->sm_ah[port_num - 1]) | |
142 | ib_destroy_ah(dev->sm_ah[port_num - 1]); | |
143 | dev->sm_ah[port_num - 1] = new_ah; | |
144 | spin_unlock(&dev->sm_lock); | |
145 | } | |
146 | ||
147 | /* | |
148 | * Snoop SM MADs for port info and P_Key table sets, so we can | |
149 | * synthesize LID change and P_Key change events. | |
150 | */ | |
f0f6f346 MS |
151 | static void smp_snoop(struct ib_device *ibdev, u8 port_num, struct ib_mad *mad, |
152 | u16 prev_lid) | |
225c7b1f RD |
153 | { |
154 | struct ib_event event; | |
155 | ||
156 | if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || | |
157 | mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && | |
158 | mad->mad_hdr.method == IB_MGMT_METHOD_SET) { | |
159 | if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) { | |
160 | struct ib_port_info *pinfo = | |
161 | (struct ib_port_info *) ((struct ib_smp *) mad)->data; | |
f0f6f346 | 162 | u16 lid = be16_to_cpu(pinfo->lid); |
225c7b1f RD |
163 | |
164 | update_sm_ah(to_mdev(ibdev), port_num, | |
165 | be16_to_cpu(pinfo->sm_lid), | |
166 | pinfo->neighbormtu_mastersmsl & 0xf); | |
167 | ||
168 | event.device = ibdev; | |
169 | event.element.port_num = port_num; | |
170 | ||
f0f6f346 | 171 | if (pinfo->clientrereg_resv_subnetto & 0x80) { |
225c7b1f | 172 | event.event = IB_EVENT_CLIENT_REREGISTER; |
f0f6f346 MS |
173 | ib_dispatch_event(&event); |
174 | } | |
225c7b1f | 175 | |
f0f6f346 MS |
176 | if (prev_lid != lid) { |
177 | event.event = IB_EVENT_LID_CHANGE; | |
178 | ib_dispatch_event(&event); | |
179 | } | |
225c7b1f RD |
180 | } |
181 | ||
182 | if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) { | |
183 | event.device = ibdev; | |
184 | event.event = IB_EVENT_PKEY_CHANGE; | |
185 | event.element.port_num = port_num; | |
186 | ib_dispatch_event(&event); | |
187 | } | |
188 | } | |
189 | } | |
190 | ||
191 | static void node_desc_override(struct ib_device *dev, | |
192 | struct ib_mad *mad) | |
193 | { | |
194 | if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || | |
195 | mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && | |
196 | mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP && | |
197 | mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) { | |
198 | spin_lock(&to_mdev(dev)->sm_lock); | |
199 | memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64); | |
200 | spin_unlock(&to_mdev(dev)->sm_lock); | |
201 | } | |
202 | } | |
203 | ||
204 | static void forward_trap(struct mlx4_ib_dev *dev, u8 port_num, struct ib_mad *mad) | |
205 | { | |
206 | int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED; | |
207 | struct ib_mad_send_buf *send_buf; | |
208 | struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn]; | |
209 | int ret; | |
210 | ||
211 | if (agent) { | |
212 | send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR, | |
213 | IB_MGMT_MAD_DATA, GFP_ATOMIC); | |
214 | /* | |
215 | * We rely here on the fact that MLX QPs don't use the | |
216 | * address handle after the send is posted (this is | |
217 | * wrong following the IB spec strictly, but we know | |
218 | * it's OK for our devices). | |
219 | */ | |
220 | spin_lock(&dev->sm_lock); | |
221 | memcpy(send_buf->mad, mad, sizeof *mad); | |
222 | if ((send_buf->ah = dev->sm_ah[port_num - 1])) | |
223 | ret = ib_post_send_mad(send_buf, NULL); | |
224 | else | |
225 | ret = -EINVAL; | |
226 | spin_unlock(&dev->sm_lock); | |
227 | ||
228 | if (ret) | |
229 | ib_free_send_mad(send_buf); | |
230 | } | |
231 | } | |
232 | ||
233 | int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, | |
234 | struct ib_wc *in_wc, struct ib_grh *in_grh, | |
235 | struct ib_mad *in_mad, struct ib_mad *out_mad) | |
236 | { | |
f0f6f346 | 237 | u16 slid, prev_lid = 0; |
225c7b1f | 238 | int err; |
f0f6f346 | 239 | struct ib_port_attr pattr; |
225c7b1f RD |
240 | |
241 | slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE); | |
242 | ||
243 | if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) { | |
244 | forward_trap(to_mdev(ibdev), port_num, in_mad); | |
245 | return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; | |
246 | } | |
247 | ||
248 | if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || | |
249 | in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
250 | if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && | |
251 | in_mad->mad_hdr.method != IB_MGMT_METHOD_SET && | |
252 | in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS) | |
253 | return IB_MAD_RESULT_SUCCESS; | |
254 | ||
255 | /* | |
256 | * Don't process SMInfo queries or vendor-specific | |
257 | * MADs -- the SMA can't handle them. | |
258 | */ | |
259 | if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO || | |
260 | ((in_mad->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) == | |
261 | IB_SMP_ATTR_VENDOR_MASK)) | |
262 | return IB_MAD_RESULT_SUCCESS; | |
263 | } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT || | |
264 | in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS1 || | |
6578cf33 EC |
265 | in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2 || |
266 | in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) { | |
225c7b1f RD |
267 | if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && |
268 | in_mad->mad_hdr.method != IB_MGMT_METHOD_SET) | |
269 | return IB_MAD_RESULT_SUCCESS; | |
270 | } else | |
271 | return IB_MAD_RESULT_SUCCESS; | |
272 | ||
f0f6f346 MS |
273 | if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || |
274 | in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && | |
275 | in_mad->mad_hdr.method == IB_MGMT_METHOD_SET && | |
276 | in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO && | |
277 | !ib_query_port(ibdev, port_num, &pattr)) | |
278 | prev_lid = pattr.lid; | |
279 | ||
225c7b1f RD |
280 | err = mlx4_MAD_IFC(to_mdev(ibdev), |
281 | mad_flags & IB_MAD_IGNORE_MKEY, | |
282 | mad_flags & IB_MAD_IGNORE_BKEY, | |
283 | port_num, in_wc, in_grh, in_mad, out_mad); | |
284 | if (err) | |
285 | return IB_MAD_RESULT_FAILURE; | |
286 | ||
287 | if (!out_mad->mad_hdr.status) { | |
f0f6f346 | 288 | smp_snoop(ibdev, port_num, in_mad, prev_lid); |
225c7b1f RD |
289 | node_desc_override(ibdev, out_mad); |
290 | } | |
291 | ||
292 | /* set return bit in status of directed route responses */ | |
293 | if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) | |
294 | out_mad->mad_hdr.status |= cpu_to_be16(1 << 15); | |
295 | ||
296 | if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) | |
297 | /* no response for trap repress */ | |
298 | return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; | |
299 | ||
300 | return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; | |
301 | } | |
302 | ||
303 | static void send_handler(struct ib_mad_agent *agent, | |
304 | struct ib_mad_send_wc *mad_send_wc) | |
305 | { | |
306 | ib_free_send_mad(mad_send_wc->send_buf); | |
307 | } | |
308 | ||
309 | int mlx4_ib_mad_init(struct mlx4_ib_dev *dev) | |
310 | { | |
311 | struct ib_mad_agent *agent; | |
312 | int p, q; | |
313 | int ret; | |
314 | ||
7ff93f8b | 315 | for (p = 0; p < dev->num_ports; ++p) |
225c7b1f RD |
316 | for (q = 0; q <= 1; ++q) { |
317 | agent = ib_register_mad_agent(&dev->ib_dev, p + 1, | |
318 | q ? IB_QPT_GSI : IB_QPT_SMI, | |
319 | NULL, 0, send_handler, | |
320 | NULL, NULL); | |
321 | if (IS_ERR(agent)) { | |
322 | ret = PTR_ERR(agent); | |
323 | goto err; | |
324 | } | |
325 | dev->send_agent[p][q] = agent; | |
326 | } | |
327 | ||
328 | return 0; | |
329 | ||
330 | err: | |
7ff93f8b | 331 | for (p = 0; p < dev->num_ports; ++p) |
225c7b1f RD |
332 | for (q = 0; q <= 1; ++q) |
333 | if (dev->send_agent[p][q]) | |
334 | ib_unregister_mad_agent(dev->send_agent[p][q]); | |
335 | ||
336 | return ret; | |
337 | } | |
338 | ||
339 | void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev) | |
340 | { | |
341 | struct ib_mad_agent *agent; | |
342 | int p, q; | |
343 | ||
7ff93f8b | 344 | for (p = 0; p < dev->num_ports; ++p) { |
225c7b1f RD |
345 | for (q = 0; q <= 1; ++q) { |
346 | agent = dev->send_agent[p][q]; | |
347 | dev->send_agent[p][q] = NULL; | |
348 | ib_unregister_mad_agent(agent); | |
349 | } | |
350 | ||
351 | if (dev->sm_ah[p]) | |
352 | ib_destroy_ah(dev->sm_ah[p]); | |
353 | } | |
354 | } |