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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> | |
37 | ||
38 | #include "mlx4_ib.h" | |
39 | ||
40 | enum { | |
41 | MLX4_IB_VENDOR_CLASS1 = 0x9, | |
42 | MLX4_IB_VENDOR_CLASS2 = 0xa | |
43 | }; | |
44 | ||
45 | int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int ignore_mkey, int ignore_bkey, | |
46 | int port, struct ib_wc *in_wc, struct ib_grh *in_grh, | |
47 | void *in_mad, void *response_mad) | |
48 | { | |
49 | struct mlx4_cmd_mailbox *inmailbox, *outmailbox; | |
50 | void *inbox; | |
51 | int err; | |
52 | u32 in_modifier = port; | |
53 | u8 op_modifier = 0; | |
54 | ||
55 | inmailbox = mlx4_alloc_cmd_mailbox(dev->dev); | |
56 | if (IS_ERR(inmailbox)) | |
57 | return PTR_ERR(inmailbox); | |
58 | inbox = inmailbox->buf; | |
59 | ||
60 | outmailbox = mlx4_alloc_cmd_mailbox(dev->dev); | |
61 | if (IS_ERR(outmailbox)) { | |
62 | mlx4_free_cmd_mailbox(dev->dev, inmailbox); | |
63 | return PTR_ERR(outmailbox); | |
64 | } | |
65 | ||
66 | memcpy(inbox, in_mad, 256); | |
67 | ||
68 | /* | |
69 | * Key check traps can't be generated unless we have in_wc to | |
70 | * tell us where to send the trap. | |
71 | */ | |
72 | if (ignore_mkey || !in_wc) | |
73 | op_modifier |= 0x1; | |
74 | if (ignore_bkey || !in_wc) | |
75 | op_modifier |= 0x2; | |
76 | ||
77 | if (in_wc) { | |
78 | struct { | |
79 | __be32 my_qpn; | |
80 | u32 reserved1; | |
81 | __be32 rqpn; | |
82 | u8 sl; | |
83 | u8 g_path; | |
84 | u16 reserved2[2]; | |
85 | __be16 pkey; | |
86 | u32 reserved3[11]; | |
87 | u8 grh[40]; | |
88 | } *ext_info; | |
89 | ||
90 | memset(inbox + 256, 0, 256); | |
91 | ext_info = inbox + 256; | |
92 | ||
93 | ext_info->my_qpn = cpu_to_be32(in_wc->qp->qp_num); | |
94 | ext_info->rqpn = cpu_to_be32(in_wc->src_qp); | |
95 | ext_info->sl = in_wc->sl << 4; | |
96 | ext_info->g_path = in_wc->dlid_path_bits | | |
97 | (in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0); | |
98 | ext_info->pkey = cpu_to_be16(in_wc->pkey_index); | |
99 | ||
100 | if (in_grh) | |
101 | memcpy(ext_info->grh, in_grh, 40); | |
102 | ||
103 | op_modifier |= 0x4; | |
104 | ||
105 | in_modifier |= in_wc->slid << 16; | |
106 | } | |
107 | ||
108 | err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma, | |
109 | in_modifier, op_modifier, | |
110 | MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C); | |
111 | ||
fe11cb6b | 112 | if (!err) |
225c7b1f RD |
113 | memcpy(response_mad, outmailbox->buf, 256); |
114 | ||
115 | mlx4_free_cmd_mailbox(dev->dev, inmailbox); | |
116 | mlx4_free_cmd_mailbox(dev->dev, outmailbox); | |
117 | ||
118 | return err; | |
119 | } | |
120 | ||
121 | static void update_sm_ah(struct mlx4_ib_dev *dev, u8 port_num, u16 lid, u8 sl) | |
122 | { | |
123 | struct ib_ah *new_ah; | |
124 | struct ib_ah_attr ah_attr; | |
125 | ||
126 | if (!dev->send_agent[port_num - 1][0]) | |
127 | return; | |
128 | ||
129 | memset(&ah_attr, 0, sizeof ah_attr); | |
130 | ah_attr.dlid = lid; | |
131 | ah_attr.sl = sl; | |
132 | ah_attr.port_num = port_num; | |
133 | ||
134 | new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd, | |
135 | &ah_attr); | |
136 | if (IS_ERR(new_ah)) | |
137 | return; | |
138 | ||
139 | spin_lock(&dev->sm_lock); | |
140 | if (dev->sm_ah[port_num - 1]) | |
141 | ib_destroy_ah(dev->sm_ah[port_num - 1]); | |
142 | dev->sm_ah[port_num - 1] = new_ah; | |
143 | spin_unlock(&dev->sm_lock); | |
144 | } | |
145 | ||
146 | /* | |
147 | * Snoop SM MADs for port info and P_Key table sets, so we can | |
148 | * synthesize LID change and P_Key change events. | |
149 | */ | |
150 | static void smp_snoop(struct ib_device *ibdev, u8 port_num, struct ib_mad *mad) | |
151 | { | |
152 | struct ib_event event; | |
153 | ||
154 | if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || | |
155 | mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && | |
156 | mad->mad_hdr.method == IB_MGMT_METHOD_SET) { | |
157 | if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) { | |
158 | struct ib_port_info *pinfo = | |
159 | (struct ib_port_info *) ((struct ib_smp *) mad)->data; | |
160 | ||
161 | update_sm_ah(to_mdev(ibdev), port_num, | |
162 | be16_to_cpu(pinfo->sm_lid), | |
163 | pinfo->neighbormtu_mastersmsl & 0xf); | |
164 | ||
165 | event.device = ibdev; | |
166 | event.element.port_num = port_num; | |
167 | ||
168 | if(pinfo->clientrereg_resv_subnetto & 0x80) | |
169 | event.event = IB_EVENT_CLIENT_REREGISTER; | |
170 | else | |
171 | event.event = IB_EVENT_LID_CHANGE; | |
172 | ||
173 | ib_dispatch_event(&event); | |
174 | } | |
175 | ||
176 | if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) { | |
177 | event.device = ibdev; | |
178 | event.event = IB_EVENT_PKEY_CHANGE; | |
179 | event.element.port_num = port_num; | |
180 | ib_dispatch_event(&event); | |
181 | } | |
182 | } | |
183 | } | |
184 | ||
185 | static void node_desc_override(struct ib_device *dev, | |
186 | struct ib_mad *mad) | |
187 | { | |
188 | if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || | |
189 | mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && | |
190 | mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP && | |
191 | mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) { | |
192 | spin_lock(&to_mdev(dev)->sm_lock); | |
193 | memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64); | |
194 | spin_unlock(&to_mdev(dev)->sm_lock); | |
195 | } | |
196 | } | |
197 | ||
198 | static void forward_trap(struct mlx4_ib_dev *dev, u8 port_num, struct ib_mad *mad) | |
199 | { | |
200 | int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED; | |
201 | struct ib_mad_send_buf *send_buf; | |
202 | struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn]; | |
203 | int ret; | |
204 | ||
205 | if (agent) { | |
206 | send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR, | |
207 | IB_MGMT_MAD_DATA, GFP_ATOMIC); | |
208 | /* | |
209 | * We rely here on the fact that MLX QPs don't use the | |
210 | * address handle after the send is posted (this is | |
211 | * wrong following the IB spec strictly, but we know | |
212 | * it's OK for our devices). | |
213 | */ | |
214 | spin_lock(&dev->sm_lock); | |
215 | memcpy(send_buf->mad, mad, sizeof *mad); | |
216 | if ((send_buf->ah = dev->sm_ah[port_num - 1])) | |
217 | ret = ib_post_send_mad(send_buf, NULL); | |
218 | else | |
219 | ret = -EINVAL; | |
220 | spin_unlock(&dev->sm_lock); | |
221 | ||
222 | if (ret) | |
223 | ib_free_send_mad(send_buf); | |
224 | } | |
225 | } | |
226 | ||
227 | int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, | |
228 | struct ib_wc *in_wc, struct ib_grh *in_grh, | |
229 | struct ib_mad *in_mad, struct ib_mad *out_mad) | |
230 | { | |
231 | u16 slid; | |
232 | int err; | |
233 | ||
234 | slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE); | |
235 | ||
236 | if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) { | |
237 | forward_trap(to_mdev(ibdev), port_num, in_mad); | |
238 | return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; | |
239 | } | |
240 | ||
241 | if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || | |
242 | in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
243 | if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && | |
244 | in_mad->mad_hdr.method != IB_MGMT_METHOD_SET && | |
245 | in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS) | |
246 | return IB_MAD_RESULT_SUCCESS; | |
247 | ||
248 | /* | |
249 | * Don't process SMInfo queries or vendor-specific | |
250 | * MADs -- the SMA can't handle them. | |
251 | */ | |
252 | if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO || | |
253 | ((in_mad->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) == | |
254 | IB_SMP_ATTR_VENDOR_MASK)) | |
255 | return IB_MAD_RESULT_SUCCESS; | |
256 | } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT || | |
257 | in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS1 || | |
258 | in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2) { | |
259 | if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && | |
260 | in_mad->mad_hdr.method != IB_MGMT_METHOD_SET) | |
261 | return IB_MAD_RESULT_SUCCESS; | |
262 | } else | |
263 | return IB_MAD_RESULT_SUCCESS; | |
264 | ||
265 | err = mlx4_MAD_IFC(to_mdev(ibdev), | |
266 | mad_flags & IB_MAD_IGNORE_MKEY, | |
267 | mad_flags & IB_MAD_IGNORE_BKEY, | |
268 | port_num, in_wc, in_grh, in_mad, out_mad); | |
269 | if (err) | |
270 | return IB_MAD_RESULT_FAILURE; | |
271 | ||
272 | if (!out_mad->mad_hdr.status) { | |
273 | smp_snoop(ibdev, port_num, in_mad); | |
274 | node_desc_override(ibdev, out_mad); | |
275 | } | |
276 | ||
277 | /* set return bit in status of directed route responses */ | |
278 | if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) | |
279 | out_mad->mad_hdr.status |= cpu_to_be16(1 << 15); | |
280 | ||
281 | if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) | |
282 | /* no response for trap repress */ | |
283 | return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; | |
284 | ||
285 | return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; | |
286 | } | |
287 | ||
288 | static void send_handler(struct ib_mad_agent *agent, | |
289 | struct ib_mad_send_wc *mad_send_wc) | |
290 | { | |
291 | ib_free_send_mad(mad_send_wc->send_buf); | |
292 | } | |
293 | ||
294 | int mlx4_ib_mad_init(struct mlx4_ib_dev *dev) | |
295 | { | |
296 | struct ib_mad_agent *agent; | |
297 | int p, q; | |
298 | int ret; | |
299 | ||
300 | for (p = 0; p < dev->dev->caps.num_ports; ++p) | |
301 | for (q = 0; q <= 1; ++q) { | |
302 | agent = ib_register_mad_agent(&dev->ib_dev, p + 1, | |
303 | q ? IB_QPT_GSI : IB_QPT_SMI, | |
304 | NULL, 0, send_handler, | |
305 | NULL, NULL); | |
306 | if (IS_ERR(agent)) { | |
307 | ret = PTR_ERR(agent); | |
308 | goto err; | |
309 | } | |
310 | dev->send_agent[p][q] = agent; | |
311 | } | |
312 | ||
313 | return 0; | |
314 | ||
315 | err: | |
316 | for (p = 0; p < dev->dev->caps.num_ports; ++p) | |
317 | for (q = 0; q <= 1; ++q) | |
318 | if (dev->send_agent[p][q]) | |
319 | ib_unregister_mad_agent(dev->send_agent[p][q]); | |
320 | ||
321 | return ret; | |
322 | } | |
323 | ||
324 | void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev) | |
325 | { | |
326 | struct ib_mad_agent *agent; | |
327 | int p, q; | |
328 | ||
329 | for (p = 0; p < dev->dev->caps.num_ports; ++p) { | |
330 | for (q = 0; q <= 1; ++q) { | |
331 | agent = dev->send_agent[p][q]; | |
332 | dev->send_agent[p][q] = NULL; | |
333 | ib_unregister_mad_agent(agent); | |
334 | } | |
335 | ||
336 | if (dev->sm_ah[p]) | |
337 | ib_destroy_ah(dev->sm_ah[p]); | |
338 | } | |
339 | } |