summaryrefslogtreecommitdiffstats
path: root/drivers/infiniband/hw/mlx5/mad.c
blob: b84d13a487cc04dcfbb501cfbd460c335bf91f8d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
/*
 * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/mlx5/cmd.h>
#include <rdma/ib_mad.h>
#include <rdma/ib_smi.h>
#include "mlx5_ib.h"

enum {
	MLX5_IB_VENDOR_CLASS1 = 0x9,
	MLX5_IB_VENDOR_CLASS2 = 0xa
};

int mlx5_MAD_IFC(struct mlx5_ib_dev *dev, int ignore_mkey, int ignore_bkey,
		 u8 port, const struct ib_wc *in_wc, const struct ib_grh *in_grh,
		 const void *in_mad, void *response_mad)
{
	u8 op_modifier = 0;

	/* Key check traps can't be generated unless we have in_wc to
	 * tell us where to send the trap.
	 */
	if (ignore_mkey || !in_wc)
		op_modifier |= 0x1;
	if (ignore_bkey || !in_wc)
		op_modifier |= 0x2;

	return mlx5_core_mad_ifc(dev->mdev, in_mad, response_mad, op_modifier, port);
}

int mlx5_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
			const struct ib_wc *in_wc, const struct ib_grh *in_grh,
			const struct ib_mad_hdr *in, size_t in_mad_size,
			struct ib_mad_hdr *out, size_t *out_mad_size,
			u16 *out_mad_pkey_index)
{
	u16 slid;
	int err;
	const struct ib_mad *in_mad = (const struct ib_mad *)in;
	struct ib_mad *out_mad = (struct ib_mad *)out;

	if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||
			 *out_mad_size != sizeof(*out_mad)))
		return IB_MAD_RESULT_FAILURE;

	slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);

	if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0)
		return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;

	if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
	    in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
		if (in_mad->mad_hdr.method   != IB_MGMT_METHOD_GET &&
		    in_mad->mad_hdr.method   != IB_MGMT_METHOD_SET &&
		    in_mad->mad_hdr.method   != IB_MGMT_METHOD_TRAP_REPRESS)
			return IB_MAD_RESULT_SUCCESS;

		/* Don't process SMInfo queries -- the SMA can't handle them.
		 */
		if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO)
			return IB_MAD_RESULT_SUCCESS;
	} else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
		   in_mad->mad_hdr.mgmt_class == MLX5_IB_VENDOR_CLASS1   ||
		   in_mad->mad_hdr.mgmt_class == MLX5_IB_VENDOR_CLASS2   ||
		   in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) {
		if (in_mad->mad_hdr.method  != IB_MGMT_METHOD_GET &&
		    in_mad->mad_hdr.method  != IB_MGMT_METHOD_SET)
			return IB_MAD_RESULT_SUCCESS;
	} else {
		return IB_MAD_RESULT_SUCCESS;
	}

	err = mlx5_MAD_IFC(to_mdev(ibdev),
			   mad_flags & IB_MAD_IGNORE_MKEY,
			   mad_flags & IB_MAD_IGNORE_BKEY,
			   port_num, in_wc, in_grh, in_mad, out_mad);
	if (err)
		return IB_MAD_RESULT_FAILURE;

	/* set return bit in status of directed route responses */
	if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
		out_mad->mad_hdr.status |= cpu_to_be16(1 << 15);

	if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
		/* no response for trap repress */
		return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;

	return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
}

int mlx5_query_ext_port_caps(struct mlx5_ib_dev *dev, u8 port)
{
	struct ib_smp *in_mad  = NULL;
	struct ib_smp *out_mad = NULL;
	int err = -ENOMEM;
	u16 packet_error;

	in_mad  = kzalloc(sizeof(*in_mad), GFP_KERNEL);
	out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
	if (!in_mad || !out_mad)
		goto out;

	init_query_mad(in_mad);
	in_mad->attr_id = MLX5_ATTR_EXTENDED_PORT_INFO;
	in_mad->attr_mod = cpu_to_be32(port);

	err = mlx5_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad);

	packet_error = be16_to_cpu(out_mad->status);

	dev->mdev->port_caps[port - 1].ext_port_cap = (!err && !packet_error) ?
		MLX_EXT_PORT_CAP_FLAG_EXTENDED_PORT_INFO : 0;

out:
	kfree(in_mad);
	kfree(out_mad);
	return err;
}

int mlx5_query_mad_ifc_smp_attr_node_info(struct ib_device *ibdev,
					  struct ib_smp *out_mad)
{
	struct ib_smp *in_mad = NULL;
	int err = -ENOMEM;

	in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL);
	if (!in_mad)
		return -ENOMEM;

	init_query_mad(in_mad);
	in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;

	err = mlx5_MAD_IFC(to_mdev(ibdev), 1, 1, 1, NULL, NULL, in_mad,
			   out_mad);

	kfree(in_mad);
	return err;
}

int mlx5_query_mad_ifc_system_image_guid(struct ib_device *ibdev,
					 __be64 *sys_image_guid)
{
	struct ib_smp *out_mad = NULL;
	int err = -ENOMEM;

	out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
	if (!out_mad)
		return -ENOMEM;

	err = mlx5_query_mad_ifc_smp_attr_node_info(ibdev, out_mad);
	if (err)
		goto out;

	memcpy(sys_image_guid, out_mad->data + 4, 8);

out:
	kfree(out_mad);

	return err;
}

int mlx5_query_mad_ifc_max_pkeys(struct ib_device *ibdev,
				 u16 *max_pkeys)
{
	struct ib_smp *out_mad = NULL;
	int err = -ENOMEM;

	out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
	if (!out_mad)
		return -ENOMEM;

	err = mlx5_query_mad_ifc_smp_attr_node_info(ibdev, out_mad);
	if (err)
		goto out;

	*max_pkeys = be16_to_cpup((__be16 *)(out_mad->data + 28));

out:
	kfree(out_mad);

	return err;
}

int mlx5_query_mad_ifc_vendor_id(struct ib_device *ibdev,
				 u32 *vendor_id)
{
	struct ib_smp *out_mad = NULL;
	int err = -ENOMEM;

	out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
	if (!out_mad)
		return -ENOMEM;

	err = mlx5_query_mad_ifc_smp_attr_node_info(ibdev, out_mad);
	if (err)
		goto out;

	*vendor_id = be32_to_cpup((__be32 *)(out_mad->data + 36)) & 0xffff;

out:
	kfree(out_mad);

	return err;
}

int mlx5_query_mad_ifc_node_desc(struct mlx5_ib_dev *dev, char *node_desc)
{
	struct ib_smp *in_mad  = NULL;
	struct ib_smp *out_mad = NULL;
	int err = -ENOMEM;

	in_mad  = kzalloc(sizeof(*in_mad), GFP_KERNEL);
	out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
	if (!in_mad || !out_mad)
		goto out;

	init_query_mad(in_mad);
	in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;

	err = mlx5_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad);
	if (err)
		goto out;

	memcpy(node_desc, out_mad->data, 64);
out:
	kfree(in_mad);
	kfree(out_mad);
	return err;
}

int mlx5_query_mad_ifc_node_guid(struct mlx5_ib_dev *dev, __be64 *node_guid)
{
	struct ib_smp *in_mad  = NULL;
	struct ib_smp *out_mad = NULL;
	int err = -ENOMEM;

	in_mad  = kzalloc(sizeof(*in_mad), GFP_KERNEL);
	out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
	if (!in_mad || !out_mad)
		goto out;

	init_query_mad(in_mad);
	in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;

	err = mlx5_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad);
	if (err)
		goto out;

	memcpy(node_guid, out_mad->data + 12, 8);
out:
	kfree(in_mad);
	kfree(out_mad);
	return err;
}

int mlx5_query_mad_ifc_pkey(struct ib_device *ibdev, u8 port, u16 index,
			    u16 *pkey)
{
	struct ib_smp *in_mad  = NULL;
	struct ib_smp *out_mad = NULL;
	int err = -ENOMEM;

	in_mad  = kzalloc(sizeof(*in_mad), GFP_KERNEL);
	out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
	if (!in_mad || !out_mad)
		goto out;

	init_query_mad(in_mad);
	in_mad->attr_id  = IB_SMP_ATTR_PKEY_TABLE;
	in_mad->attr_mod = cpu_to_be32(index / 32);

	err = mlx5_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad,
			   out_mad);
	if (err)
		goto out;

	*pkey = be16_to_cpu(((__be16 *)out_mad->data)[index % 32]);

out:
	kfree(in_mad);
	kfree(out_mad);
	return err;
}

int mlx5_query_mad_ifc_gids(struct ib_device *ibdev, u8 port, int index,
			    union ib_gid *gid)
{
	struct ib_smp *in_mad  = NULL;
	struct ib_smp *out_mad = NULL;
	int err = -ENOMEM;

	in_mad  = kzalloc(sizeof(*in_mad), GFP_KERNEL);
	out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
	if (!in_mad || !out_mad)
		goto out;

	init_query_mad(in_mad);
	in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
	in_mad->attr_mod = cpu_to_be32(port);

	err = mlx5_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad,
			   out_mad);
	if (err)
		goto out;

	memcpy(gid->raw, out_mad->data + 8, 8);

	init_query_mad(in_mad);
	in_mad->attr_id  = IB_SMP_ATTR_GUID_INFO;
	in_mad->attr_mod = cpu_to_be32(index / 8);

	err = mlx5_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad,
			   out_mad);
	if (err)
		goto out;

	memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8);

out:
	kfree(in_mad);
	kfree(out_mad);
	return err;
}

int mlx5_query_mad_ifc_port(struct ib_device *ibdev, u8 port,
			    struct ib_port_attr *props)
{
	struct mlx5_ib_dev *dev = to_mdev(ibdev);
	struct mlx5_core_dev *mdev = dev->mdev;
	struct ib_smp *in_mad  = NULL;
	struct ib_smp *out_mad = NULL;
	int ext_active_speed;
	int err = -ENOMEM;

	if (port < 1 || port > MLX5_CAP_GEN(mdev, num_ports)) {
		mlx5_ib_warn(dev, "invalid port number %d\n", port);
		return -EINVAL;
	}

	in_mad  = kzalloc(sizeof(*in_mad), GFP_KERNEL);
	out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
	if (!in_mad || !out_mad)
		goto out;

	memset(props, 0, sizeof(*props));

	init_query_mad(in_mad);
	in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
	in_mad->attr_mod = cpu_to_be32(port);

	err = mlx5_MAD_IFC(dev, 1, 1, port, NULL, NULL, in_mad, out_mad);
	if (err) {
		mlx5_ib_warn(dev, "err %d\n", err);
		goto out;
	}

	props->lid		= be16_to_cpup((__be16 *)(out_mad->data + 16));
	props->lmc		= out_mad->data[34] & 0x7;
	props->sm_lid		= be16_to_cpup((__be16 *)(out_mad->data + 18));
	props->sm_sl		= out_mad->data[36] & 0xf;
	props->state		= out_mad->data[32] & 0xf;
	props->phys_state	= out_mad->data[33] >> 4;
	props->port_cap_flags	= be32_to_cpup((__be32 *)(out_mad->data + 20));
	props->gid_tbl_len	= out_mad->data[50];
	props->max_msg_sz	= 1 << MLX5_CAP_GEN(mdev, log_max_msg);
	props->pkey_tbl_len	= mdev->port_caps[port - 1].pkey_table_len;
	props->bad_pkey_cntr	= be16_to_cpup((__be16 *)(out_mad->data + 46));
	props->qkey_viol_cntr	= be16_to_cpup((__be16 *)(out_mad->data + 48));
	props->active_width	= out_mad->data[31] & 0xf;
	props->active_speed	= out_mad->data[35] >> 4;
	props->max_mtu		= out_mad->data[41] & 0xf;
	props->active_mtu	= out_mad->data[36] >> 4;
	props->subnet_timeout	= out_mad->data[51] & 0x1f;
	props->max_vl_num	= out_mad->data[37] >> 4;
	props->init_type_reply	= out_mad->data[41] >> 4;

	/* Check if extended speeds (EDR/FDR/...) are supported */
	if (props->port_cap_flags & IB_PORT_EXTENDED_SPEEDS_SUP) {
		ext_active_speed = out_mad->data[62] >> 4;

		switch (ext_active_speed) {
		case 1:
			props->active_speed = 16; /* FDR */
			break;
		case 2:
			props->active_speed = 32; /* EDR */
			break;
		}
	}

	/* If reported active speed is QDR, check if is FDR-10 */
	if (props->active_speed == 4) {
		if (mdev->port_caps[port - 1].ext_port_cap &
		    MLX_EXT_PORT_CAP_FLAG_EXTENDED_PORT_INFO) {
			init_query_mad(in_mad);
			in_mad->attr_id = MLX5_ATTR_EXTENDED_PORT_INFO;
			in_mad->attr_mod = cpu_to_be32(port);

			err = mlx5_MAD_IFC(dev, 1, 1, port,
					   NULL, NULL, in_mad, out_mad);
			if (err)
				goto out;

			/* Checking LinkSpeedActive for FDR-10 */
			if (out_mad->data[15] & 0x1)
				props->active_speed = 8;
		}
	}

out:
	kfree(in_mad);
	kfree(out_mad);

	return err;
}