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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> |
c3779134 | 38 | #include <rdma/ib_pma.h> |
225c7b1f RD |
39 | |
40 | #include "mlx4_ib.h" | |
41 | ||
42 | enum { | |
43 | MLX4_IB_VENDOR_CLASS1 = 0x9, | |
44 | MLX4_IB_VENDOR_CLASS2 = 0xa | |
45 | }; | |
46 | ||
47 | int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int ignore_mkey, int ignore_bkey, | |
48 | int port, struct ib_wc *in_wc, struct ib_grh *in_grh, | |
49 | void *in_mad, void *response_mad) | |
50 | { | |
51 | struct mlx4_cmd_mailbox *inmailbox, *outmailbox; | |
52 | void *inbox; | |
53 | int err; | |
54 | u32 in_modifier = port; | |
55 | u8 op_modifier = 0; | |
56 | ||
57 | inmailbox = mlx4_alloc_cmd_mailbox(dev->dev); | |
58 | if (IS_ERR(inmailbox)) | |
59 | return PTR_ERR(inmailbox); | |
60 | inbox = inmailbox->buf; | |
61 | ||
62 | outmailbox = mlx4_alloc_cmd_mailbox(dev->dev); | |
63 | if (IS_ERR(outmailbox)) { | |
64 | mlx4_free_cmd_mailbox(dev->dev, inmailbox); | |
65 | return PTR_ERR(outmailbox); | |
66 | } | |
67 | ||
68 | memcpy(inbox, in_mad, 256); | |
69 | ||
70 | /* | |
71 | * Key check traps can't be generated unless we have in_wc to | |
72 | * tell us where to send the trap. | |
73 | */ | |
74 | if (ignore_mkey || !in_wc) | |
75 | op_modifier |= 0x1; | |
76 | if (ignore_bkey || !in_wc) | |
77 | op_modifier |= 0x2; | |
78 | ||
79 | if (in_wc) { | |
80 | struct { | |
81 | __be32 my_qpn; | |
82 | u32 reserved1; | |
83 | __be32 rqpn; | |
84 | u8 sl; | |
85 | u8 g_path; | |
86 | u16 reserved2[2]; | |
87 | __be16 pkey; | |
88 | u32 reserved3[11]; | |
89 | u8 grh[40]; | |
90 | } *ext_info; | |
91 | ||
92 | memset(inbox + 256, 0, 256); | |
93 | ext_info = inbox + 256; | |
94 | ||
95 | ext_info->my_qpn = cpu_to_be32(in_wc->qp->qp_num); | |
96 | ext_info->rqpn = cpu_to_be32(in_wc->src_qp); | |
97 | ext_info->sl = in_wc->sl << 4; | |
98 | ext_info->g_path = in_wc->dlid_path_bits | | |
99 | (in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0); | |
100 | ext_info->pkey = cpu_to_be16(in_wc->pkey_index); | |
101 | ||
102 | if (in_grh) | |
103 | memcpy(ext_info->grh, in_grh, 40); | |
104 | ||
105 | op_modifier |= 0x4; | |
106 | ||
107 | in_modifier |= in_wc->slid << 16; | |
108 | } | |
109 | ||
110 | err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma, | |
111 | in_modifier, op_modifier, | |
f9baff50 JM |
112 | MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C, |
113 | MLX4_CMD_NATIVE); | |
225c7b1f | 114 | |
fe11cb6b | 115 | if (!err) |
225c7b1f RD |
116 | memcpy(response_mad, outmailbox->buf, 256); |
117 | ||
118 | mlx4_free_cmd_mailbox(dev->dev, inmailbox); | |
119 | mlx4_free_cmd_mailbox(dev->dev, outmailbox); | |
120 | ||
121 | return err; | |
122 | } | |
123 | ||
124 | static void update_sm_ah(struct mlx4_ib_dev *dev, u8 port_num, u16 lid, u8 sl) | |
125 | { | |
126 | struct ib_ah *new_ah; | |
127 | struct ib_ah_attr ah_attr; | |
128 | ||
129 | if (!dev->send_agent[port_num - 1][0]) | |
130 | return; | |
131 | ||
132 | memset(&ah_attr, 0, sizeof ah_attr); | |
133 | ah_attr.dlid = lid; | |
134 | ah_attr.sl = sl; | |
135 | ah_attr.port_num = port_num; | |
136 | ||
137 | new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd, | |
138 | &ah_attr); | |
139 | if (IS_ERR(new_ah)) | |
140 | return; | |
141 | ||
142 | spin_lock(&dev->sm_lock); | |
143 | if (dev->sm_ah[port_num - 1]) | |
144 | ib_destroy_ah(dev->sm_ah[port_num - 1]); | |
145 | dev->sm_ah[port_num - 1] = new_ah; | |
146 | spin_unlock(&dev->sm_lock); | |
147 | } | |
148 | ||
149 | /* | |
150 | * Snoop SM MADs for port info and P_Key table sets, so we can | |
151 | * synthesize LID change and P_Key change events. | |
152 | */ | |
f0f6f346 MS |
153 | static void smp_snoop(struct ib_device *ibdev, u8 port_num, struct ib_mad *mad, |
154 | u16 prev_lid) | |
225c7b1f RD |
155 | { |
156 | struct ib_event event; | |
157 | ||
158 | if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || | |
159 | mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && | |
160 | mad->mad_hdr.method == IB_MGMT_METHOD_SET) { | |
161 | if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) { | |
162 | struct ib_port_info *pinfo = | |
163 | (struct ib_port_info *) ((struct ib_smp *) mad)->data; | |
f0f6f346 | 164 | u16 lid = be16_to_cpu(pinfo->lid); |
225c7b1f RD |
165 | |
166 | update_sm_ah(to_mdev(ibdev), port_num, | |
167 | be16_to_cpu(pinfo->sm_lid), | |
168 | pinfo->neighbormtu_mastersmsl & 0xf); | |
169 | ||
170 | event.device = ibdev; | |
171 | event.element.port_num = port_num; | |
172 | ||
f0f6f346 | 173 | if (pinfo->clientrereg_resv_subnetto & 0x80) { |
225c7b1f | 174 | event.event = IB_EVENT_CLIENT_REREGISTER; |
f0f6f346 MS |
175 | ib_dispatch_event(&event); |
176 | } | |
225c7b1f | 177 | |
f0f6f346 MS |
178 | if (prev_lid != lid) { |
179 | event.event = IB_EVENT_LID_CHANGE; | |
180 | ib_dispatch_event(&event); | |
181 | } | |
225c7b1f RD |
182 | } |
183 | ||
184 | if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) { | |
185 | event.device = ibdev; | |
186 | event.event = IB_EVENT_PKEY_CHANGE; | |
187 | event.element.port_num = port_num; | |
188 | ib_dispatch_event(&event); | |
189 | } | |
190 | } | |
191 | } | |
192 | ||
193 | static void node_desc_override(struct ib_device *dev, | |
194 | struct ib_mad *mad) | |
195 | { | |
196 | if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || | |
197 | mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && | |
198 | mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP && | |
199 | mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) { | |
200 | spin_lock(&to_mdev(dev)->sm_lock); | |
201 | memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64); | |
202 | spin_unlock(&to_mdev(dev)->sm_lock); | |
203 | } | |
204 | } | |
205 | ||
206 | static void forward_trap(struct mlx4_ib_dev *dev, u8 port_num, struct ib_mad *mad) | |
207 | { | |
208 | int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED; | |
209 | struct ib_mad_send_buf *send_buf; | |
210 | struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn]; | |
211 | int ret; | |
212 | ||
213 | if (agent) { | |
214 | send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR, | |
215 | IB_MGMT_MAD_DATA, GFP_ATOMIC); | |
13974909 DC |
216 | if (IS_ERR(send_buf)) |
217 | return; | |
225c7b1f RD |
218 | /* |
219 | * We rely here on the fact that MLX QPs don't use the | |
220 | * address handle after the send is posted (this is | |
221 | * wrong following the IB spec strictly, but we know | |
222 | * it's OK for our devices). | |
223 | */ | |
224 | spin_lock(&dev->sm_lock); | |
225 | memcpy(send_buf->mad, mad, sizeof *mad); | |
226 | if ((send_buf->ah = dev->sm_ah[port_num - 1])) | |
227 | ret = ib_post_send_mad(send_buf, NULL); | |
228 | else | |
229 | ret = -EINVAL; | |
230 | spin_unlock(&dev->sm_lock); | |
231 | ||
232 | if (ret) | |
233 | ib_free_send_mad(send_buf); | |
234 | } | |
235 | } | |
236 | ||
c3779134 | 237 | static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, |
225c7b1f RD |
238 | struct ib_wc *in_wc, struct ib_grh *in_grh, |
239 | struct ib_mad *in_mad, struct ib_mad *out_mad) | |
240 | { | |
f0f6f346 | 241 | u16 slid, prev_lid = 0; |
225c7b1f | 242 | int err; |
f0f6f346 | 243 | struct ib_port_attr pattr; |
225c7b1f RD |
244 | |
245 | slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE); | |
246 | ||
247 | if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) { | |
248 | forward_trap(to_mdev(ibdev), port_num, in_mad); | |
249 | return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; | |
250 | } | |
251 | ||
252 | if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || | |
253 | in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
254 | if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && | |
255 | in_mad->mad_hdr.method != IB_MGMT_METHOD_SET && | |
256 | in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS) | |
257 | return IB_MAD_RESULT_SUCCESS; | |
258 | ||
259 | /* | |
a6f7feae | 260 | * Don't process SMInfo queries -- the SMA can't handle them. |
225c7b1f | 261 | */ |
a6f7feae | 262 | if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO) |
225c7b1f RD |
263 | return IB_MAD_RESULT_SUCCESS; |
264 | } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT || | |
265 | in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS1 || | |
6578cf33 EC |
266 | in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2 || |
267 | in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) { | |
225c7b1f RD |
268 | if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && |
269 | in_mad->mad_hdr.method != IB_MGMT_METHOD_SET) | |
270 | return IB_MAD_RESULT_SUCCESS; | |
271 | } else | |
272 | return IB_MAD_RESULT_SUCCESS; | |
273 | ||
f0f6f346 MS |
274 | if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || |
275 | in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && | |
276 | in_mad->mad_hdr.method == IB_MGMT_METHOD_SET && | |
277 | in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO && | |
278 | !ib_query_port(ibdev, port_num, &pattr)) | |
279 | prev_lid = pattr.lid; | |
280 | ||
225c7b1f RD |
281 | err = mlx4_MAD_IFC(to_mdev(ibdev), |
282 | mad_flags & IB_MAD_IGNORE_MKEY, | |
283 | mad_flags & IB_MAD_IGNORE_BKEY, | |
284 | port_num, in_wc, in_grh, in_mad, out_mad); | |
285 | if (err) | |
286 | return IB_MAD_RESULT_FAILURE; | |
287 | ||
288 | if (!out_mad->mad_hdr.status) { | |
f0f6f346 | 289 | smp_snoop(ibdev, port_num, in_mad, prev_lid); |
225c7b1f RD |
290 | node_desc_override(ibdev, out_mad); |
291 | } | |
292 | ||
293 | /* set return bit in status of directed route responses */ | |
294 | if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) | |
295 | out_mad->mad_hdr.status |= cpu_to_be16(1 << 15); | |
296 | ||
297 | if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) | |
298 | /* no response for trap repress */ | |
299 | return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; | |
300 | ||
301 | return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; | |
302 | } | |
303 | ||
c3779134 OG |
304 | static void edit_counter(struct mlx4_counter *cnt, |
305 | struct ib_pma_portcounters *pma_cnt) | |
306 | { | |
307 | pma_cnt->port_xmit_data = cpu_to_be32((be64_to_cpu(cnt->tx_bytes)>>2)); | |
308 | pma_cnt->port_rcv_data = cpu_to_be32((be64_to_cpu(cnt->rx_bytes)>>2)); | |
309 | pma_cnt->port_xmit_packets = cpu_to_be32(be64_to_cpu(cnt->tx_frames)); | |
310 | pma_cnt->port_rcv_packets = cpu_to_be32(be64_to_cpu(cnt->rx_frames)); | |
311 | } | |
312 | ||
313 | static int iboe_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, | |
314 | struct ib_wc *in_wc, struct ib_grh *in_grh, | |
315 | struct ib_mad *in_mad, struct ib_mad *out_mad) | |
316 | { | |
317 | struct mlx4_cmd_mailbox *mailbox; | |
318 | struct mlx4_ib_dev *dev = to_mdev(ibdev); | |
319 | int err; | |
320 | u32 inmod = dev->counters[port_num - 1] & 0xffff; | |
321 | u8 mode; | |
322 | ||
323 | if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT) | |
324 | return -EINVAL; | |
325 | ||
326 | mailbox = mlx4_alloc_cmd_mailbox(dev->dev); | |
327 | if (IS_ERR(mailbox)) | |
328 | return IB_MAD_RESULT_FAILURE; | |
329 | ||
330 | err = mlx4_cmd_box(dev->dev, 0, mailbox->dma, inmod, 0, | |
f9baff50 JM |
331 | MLX4_CMD_QUERY_IF_STAT, MLX4_CMD_TIME_CLASS_C, |
332 | MLX4_CMD_WRAPPED); | |
c3779134 OG |
333 | if (err) |
334 | err = IB_MAD_RESULT_FAILURE; | |
335 | else { | |
336 | memset(out_mad->data, 0, sizeof out_mad->data); | |
337 | mode = ((struct mlx4_counter *)mailbox->buf)->counter_mode; | |
338 | switch (mode & 0xf) { | |
339 | case 0: | |
340 | edit_counter(mailbox->buf, | |
341 | (void *)(out_mad->data + 40)); | |
342 | err = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; | |
343 | break; | |
344 | default: | |
345 | err = IB_MAD_RESULT_FAILURE; | |
346 | } | |
347 | } | |
348 | ||
349 | mlx4_free_cmd_mailbox(dev->dev, mailbox); | |
350 | ||
351 | return err; | |
352 | } | |
353 | ||
354 | int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, | |
355 | struct ib_wc *in_wc, struct ib_grh *in_grh, | |
356 | struct ib_mad *in_mad, struct ib_mad *out_mad) | |
357 | { | |
358 | switch (rdma_port_get_link_layer(ibdev, port_num)) { | |
359 | case IB_LINK_LAYER_INFINIBAND: | |
360 | return ib_process_mad(ibdev, mad_flags, port_num, in_wc, | |
361 | in_grh, in_mad, out_mad); | |
362 | case IB_LINK_LAYER_ETHERNET: | |
363 | return iboe_process_mad(ibdev, mad_flags, port_num, in_wc, | |
364 | in_grh, in_mad, out_mad); | |
365 | default: | |
366 | return -EINVAL; | |
367 | } | |
368 | } | |
369 | ||
225c7b1f RD |
370 | static void send_handler(struct ib_mad_agent *agent, |
371 | struct ib_mad_send_wc *mad_send_wc) | |
372 | { | |
373 | ib_free_send_mad(mad_send_wc->send_buf); | |
374 | } | |
375 | ||
376 | int mlx4_ib_mad_init(struct mlx4_ib_dev *dev) | |
377 | { | |
378 | struct ib_mad_agent *agent; | |
379 | int p, q; | |
380 | int ret; | |
fa417f7b | 381 | enum rdma_link_layer ll; |
225c7b1f | 382 | |
fa417f7b EC |
383 | for (p = 0; p < dev->num_ports; ++p) { |
384 | ll = rdma_port_get_link_layer(&dev->ib_dev, p + 1); | |
225c7b1f | 385 | for (q = 0; q <= 1; ++q) { |
fa417f7b EC |
386 | if (ll == IB_LINK_LAYER_INFINIBAND) { |
387 | agent = ib_register_mad_agent(&dev->ib_dev, p + 1, | |
388 | q ? IB_QPT_GSI : IB_QPT_SMI, | |
389 | NULL, 0, send_handler, | |
390 | NULL, NULL); | |
391 | if (IS_ERR(agent)) { | |
392 | ret = PTR_ERR(agent); | |
393 | goto err; | |
394 | } | |
395 | dev->send_agent[p][q] = agent; | |
396 | } else | |
397 | dev->send_agent[p][q] = NULL; | |
225c7b1f | 398 | } |
fa417f7b | 399 | } |
225c7b1f RD |
400 | |
401 | return 0; | |
402 | ||
403 | err: | |
7ff93f8b | 404 | for (p = 0; p < dev->num_ports; ++p) |
225c7b1f RD |
405 | for (q = 0; q <= 1; ++q) |
406 | if (dev->send_agent[p][q]) | |
407 | ib_unregister_mad_agent(dev->send_agent[p][q]); | |
408 | ||
409 | return ret; | |
410 | } | |
411 | ||
412 | void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev) | |
413 | { | |
414 | struct ib_mad_agent *agent; | |
415 | int p, q; | |
416 | ||
7ff93f8b | 417 | for (p = 0; p < dev->num_ports; ++p) { |
225c7b1f RD |
418 | for (q = 0; q <= 1; ++q) { |
419 | agent = dev->send_agent[p][q]; | |
fa417f7b EC |
420 | if (agent) { |
421 | dev->send_agent[p][q] = NULL; | |
422 | ib_unregister_mad_agent(agent); | |
423 | } | |
225c7b1f RD |
424 | } |
425 | ||
426 | if (dev->sm_ah[p]) | |
427 | ib_destroy_ah(dev->sm_ah[p]); | |
428 | } | |
429 | } |