1 /*
2 * Copyright (c) 2013-2015, Mellanox Technologies. 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 <linux/mlx5/vport.h>
34 #include <rdma/ib_mad.h>
35 #include <rdma/ib_smi.h>
36 #include <rdma/ib_pma.h>
37 #include "mlx5_ib.h"
38 #include "cmd.h"
39
40 enum {
41 MLX5_IB_VENDOR_CLASS1 = 0x9,
42 MLX5_IB_VENDOR_CLASS2 = 0xa
43 };
44
can_do_mad_ifc(struct mlx5_ib_dev * dev,u32 port_num,struct ib_mad * in_mad)45 static bool can_do_mad_ifc(struct mlx5_ib_dev *dev, u32 port_num,
46 struct ib_mad *in_mad)
47 {
48 if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED &&
49 in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
50 return true;
51 return dev->port_caps[port_num - 1].has_smi;
52 }
53
mlx5_MAD_IFC(struct mlx5_ib_dev * dev,int ignore_mkey,int ignore_bkey,u32 port,const struct ib_wc * in_wc,const struct ib_grh * in_grh,const void * in_mad,void * response_mad)54 static int mlx5_MAD_IFC(struct mlx5_ib_dev *dev, int ignore_mkey,
55 int ignore_bkey, u32 port, const struct ib_wc *in_wc,
56 const struct ib_grh *in_grh, const void *in_mad,
57 void *response_mad)
58 {
59 u8 op_modifier = 0;
60
61 if (!can_do_mad_ifc(dev, port, (struct ib_mad *)in_mad))
62 return -EPERM;
63
64 /* Key check traps can't be generated unless we have in_wc to
65 * tell us where to send the trap.
66 */
67 if (ignore_mkey || !in_wc)
68 op_modifier |= 0x1;
69 if (ignore_bkey || !in_wc)
70 op_modifier |= 0x2;
71
72 return mlx5_cmd_mad_ifc(dev->mdev, in_mad, response_mad, op_modifier,
73 port);
74 }
75
pma_cnt_ext_assign(struct ib_pma_portcounters_ext * pma_cnt_ext,void * out)76 static void pma_cnt_ext_assign(struct ib_pma_portcounters_ext *pma_cnt_ext,
77 void *out)
78 {
79 #define MLX5_SUM_CNT(p, cntr1, cntr2) \
80 (MLX5_GET64(query_vport_counter_out, p, cntr1) + \
81 MLX5_GET64(query_vport_counter_out, p, cntr2))
82
83 pma_cnt_ext->port_xmit_data =
84 cpu_to_be64(MLX5_SUM_CNT(out, transmitted_ib_unicast.octets,
85 transmitted_ib_multicast.octets) >> 2);
86 pma_cnt_ext->port_rcv_data =
87 cpu_to_be64(MLX5_SUM_CNT(out, received_ib_unicast.octets,
88 received_ib_multicast.octets) >> 2);
89 pma_cnt_ext->port_xmit_packets =
90 cpu_to_be64(MLX5_SUM_CNT(out, transmitted_ib_unicast.packets,
91 transmitted_ib_multicast.packets));
92 pma_cnt_ext->port_rcv_packets =
93 cpu_to_be64(MLX5_SUM_CNT(out, received_ib_unicast.packets,
94 received_ib_multicast.packets));
95 pma_cnt_ext->port_unicast_xmit_packets =
96 MLX5_GET64_BE(query_vport_counter_out,
97 out, transmitted_ib_unicast.packets);
98 pma_cnt_ext->port_unicast_rcv_packets =
99 MLX5_GET64_BE(query_vport_counter_out,
100 out, received_ib_unicast.packets);
101 pma_cnt_ext->port_multicast_xmit_packets =
102 MLX5_GET64_BE(query_vport_counter_out,
103 out, transmitted_ib_multicast.packets);
104 pma_cnt_ext->port_multicast_rcv_packets =
105 MLX5_GET64_BE(query_vport_counter_out,
106 out, received_ib_multicast.packets);
107 }
108
pma_cnt_assign(struct ib_pma_portcounters * pma_cnt,void * out)109 static void pma_cnt_assign(struct ib_pma_portcounters *pma_cnt,
110 void *out)
111 {
112 /* Traffic counters will be reported in
113 * their 64bit form via ib_pma_portcounters_ext by default.
114 */
115 void *out_pma = MLX5_ADDR_OF(ppcnt_reg, out,
116 counter_set);
117
118 #define MLX5_ASSIGN_PMA_CNTR(counter_var, counter_name) { \
119 counter_var = MLX5_GET_BE(typeof(counter_var), \
120 ib_port_cntrs_grp_data_layout, \
121 out_pma, counter_name); \
122 }
123
124 MLX5_ASSIGN_PMA_CNTR(pma_cnt->symbol_error_counter,
125 symbol_error_counter);
126 MLX5_ASSIGN_PMA_CNTR(pma_cnt->link_error_recovery_counter,
127 link_error_recovery_counter);
128 MLX5_ASSIGN_PMA_CNTR(pma_cnt->link_downed_counter,
129 link_downed_counter);
130 MLX5_ASSIGN_PMA_CNTR(pma_cnt->port_rcv_errors,
131 port_rcv_errors);
132 MLX5_ASSIGN_PMA_CNTR(pma_cnt->port_rcv_remphys_errors,
133 port_rcv_remote_physical_errors);
134 MLX5_ASSIGN_PMA_CNTR(pma_cnt->port_rcv_switch_relay_errors,
135 port_rcv_switch_relay_errors);
136 MLX5_ASSIGN_PMA_CNTR(pma_cnt->port_xmit_discards,
137 port_xmit_discards);
138 MLX5_ASSIGN_PMA_CNTR(pma_cnt->port_xmit_constraint_errors,
139 port_xmit_constraint_errors);
140 MLX5_ASSIGN_PMA_CNTR(pma_cnt->port_xmit_wait,
141 port_xmit_wait);
142 MLX5_ASSIGN_PMA_CNTR(pma_cnt->port_rcv_constraint_errors,
143 port_rcv_constraint_errors);
144 MLX5_ASSIGN_PMA_CNTR(pma_cnt->link_overrun_errors,
145 link_overrun_errors);
146 MLX5_ASSIGN_PMA_CNTR(pma_cnt->vl15_dropped,
147 vl_15_dropped);
148 }
149
query_ib_ppcnt(struct mlx5_core_dev * dev,u8 port_num,void * out,size_t sz)150 static int query_ib_ppcnt(struct mlx5_core_dev *dev, u8 port_num, void *out,
151 size_t sz)
152 {
153 u32 *in;
154 int err;
155
156 in = kvzalloc(sz, GFP_KERNEL);
157 if (!in) {
158 err = -ENOMEM;
159 return err;
160 }
161
162 MLX5_SET(ppcnt_reg, in, local_port, port_num);
163
164 MLX5_SET(ppcnt_reg, in, grp, MLX5_INFINIBAND_PORT_COUNTERS_GROUP);
165 err = mlx5_core_access_reg(dev, in, sz, out,
166 sz, MLX5_REG_PPCNT, 0, 0);
167
168 kvfree(in);
169 return err;
170 }
171
process_pma_cmd(struct mlx5_ib_dev * dev,u32 port_num,const struct ib_mad * in_mad,struct ib_mad * out_mad)172 static int process_pma_cmd(struct mlx5_ib_dev *dev, u32 port_num,
173 const struct ib_mad *in_mad, struct ib_mad *out_mad)
174 {
175 struct mlx5_core_dev *mdev;
176 bool native_port = true;
177 u32 mdev_port_num;
178 void *out_cnt;
179 int err;
180
181 mdev = mlx5_ib_get_native_port_mdev(dev, port_num, &mdev_port_num);
182 if (!mdev) {
183 /* Fail to get the native port, likely due to 2nd port is still
184 * unaffiliated. In such case default to 1st port and attached
185 * PF device.
186 */
187 native_port = false;
188 mdev = dev->mdev;
189 mdev_port_num = 1;
190 }
191 if (MLX5_CAP_GEN(dev->mdev, num_ports) == 1 &&
192 !mlx5_core_mp_enabled(mdev)) {
193 /* set local port to one for Function-Per-Port HCA. */
194 mdev = dev->mdev;
195 mdev_port_num = 1;
196 }
197
198 /* Declaring support of extended counters */
199 if (in_mad->mad_hdr.attr_id == IB_PMA_CLASS_PORT_INFO) {
200 struct ib_class_port_info cpi = {};
201
202 cpi.capability_mask = IB_PMA_CLASS_CAP_EXT_WIDTH;
203 memcpy((out_mad->data + 40), &cpi, sizeof(cpi));
204 err = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
205 goto done;
206 }
207
208 if (in_mad->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS_EXT) {
209 struct ib_pma_portcounters_ext *pma_cnt_ext =
210 (struct ib_pma_portcounters_ext *)(out_mad->data + 40);
211 int sz = MLX5_ST_SZ_BYTES(query_vport_counter_out);
212
213 out_cnt = kvzalloc(sz, GFP_KERNEL);
214 if (!out_cnt) {
215 err = IB_MAD_RESULT_FAILURE;
216 goto done;
217 }
218
219 err = mlx5_core_query_vport_counter(mdev, 0, 0, mdev_port_num,
220 out_cnt);
221 if (!err)
222 pma_cnt_ext_assign(pma_cnt_ext, out_cnt);
223 } else {
224 struct ib_pma_portcounters *pma_cnt =
225 (struct ib_pma_portcounters *)(out_mad->data + 40);
226 int sz = MLX5_ST_SZ_BYTES(ppcnt_reg);
227
228 out_cnt = kvzalloc(sz, GFP_KERNEL);
229 if (!out_cnt) {
230 err = IB_MAD_RESULT_FAILURE;
231 goto done;
232 }
233
234 err = query_ib_ppcnt(mdev, mdev_port_num, out_cnt, sz);
235 if (!err)
236 pma_cnt_assign(pma_cnt, out_cnt);
237 }
238 kvfree(out_cnt);
239 err = err ? IB_MAD_RESULT_FAILURE :
240 IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
241 done:
242 if (native_port)
243 mlx5_ib_put_native_port_mdev(dev, port_num);
244 return err;
245 }
246
mlx5_ib_process_mad(struct ib_device * ibdev,int mad_flags,u32 port_num,const struct ib_wc * in_wc,const struct ib_grh * in_grh,const struct ib_mad * in,struct ib_mad * out,size_t * out_mad_size,u16 * out_mad_pkey_index)247 int mlx5_ib_process_mad(struct ib_device *ibdev, int mad_flags, u32 port_num,
248 const struct ib_wc *in_wc, const struct ib_grh *in_grh,
249 const struct ib_mad *in, struct ib_mad *out,
250 size_t *out_mad_size, u16 *out_mad_pkey_index)
251 {
252 struct mlx5_ib_dev *dev = to_mdev(ibdev);
253 u8 mgmt_class = in->mad_hdr.mgmt_class;
254 u8 method = in->mad_hdr.method;
255 u16 slid;
256 int err;
257
258 slid = in_wc ? ib_lid_cpu16(in_wc->slid) :
259 be16_to_cpu(IB_LID_PERMISSIVE);
260
261 if (method == IB_MGMT_METHOD_TRAP && !slid)
262 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
263
264 switch (mgmt_class) {
265 case IB_MGMT_CLASS_SUBN_LID_ROUTED:
266 case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE: {
267 if (method != IB_MGMT_METHOD_GET &&
268 method != IB_MGMT_METHOD_SET &&
269 method != IB_MGMT_METHOD_TRAP_REPRESS)
270 return IB_MAD_RESULT_SUCCESS;
271
272 /* Don't process SMInfo queries -- the SMA can't handle them.
273 */
274 if (in->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO)
275 return IB_MAD_RESULT_SUCCESS;
276 } break;
277 case IB_MGMT_CLASS_PERF_MGMT:
278 if (MLX5_CAP_GEN(dev->mdev, vport_counters) &&
279 method == IB_MGMT_METHOD_GET)
280 return process_pma_cmd(dev, port_num, in, out);
281 fallthrough;
282 case MLX5_IB_VENDOR_CLASS1:
283 case MLX5_IB_VENDOR_CLASS2:
284 case IB_MGMT_CLASS_CONG_MGMT: {
285 if (method != IB_MGMT_METHOD_GET &&
286 method != IB_MGMT_METHOD_SET)
287 return IB_MAD_RESULT_SUCCESS;
288 } break;
289 default:
290 return IB_MAD_RESULT_SUCCESS;
291 }
292
293 err = mlx5_MAD_IFC(to_mdev(ibdev), mad_flags & IB_MAD_IGNORE_MKEY,
294 mad_flags & IB_MAD_IGNORE_BKEY, port_num, in_wc,
295 in_grh, in, out);
296 if (err)
297 return IB_MAD_RESULT_FAILURE;
298
299 /* set return bit in status of directed route responses */
300 if (mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
301 out->mad_hdr.status |= cpu_to_be16(1 << 15);
302
303 if (method == IB_MGMT_METHOD_TRAP_REPRESS)
304 /* no response for trap repress */
305 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
306
307 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
308 }
309
mlx5_query_ext_port_caps(struct mlx5_ib_dev * dev,unsigned int port)310 int mlx5_query_ext_port_caps(struct mlx5_ib_dev *dev, unsigned int port)
311 {
312 struct ib_smp *in_mad;
313 struct ib_smp *out_mad;
314 int err = -ENOMEM;
315 u16 packet_error;
316
317 in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL);
318 out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
319 if (!in_mad || !out_mad)
320 goto out;
321
322 ib_init_query_mad(in_mad);
323 in_mad->attr_id = MLX5_ATTR_EXTENDED_PORT_INFO;
324 in_mad->attr_mod = cpu_to_be32(port);
325
326 err = mlx5_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad);
327
328 packet_error = be16_to_cpu(out_mad->status);
329
330 dev->port_caps[port - 1].ext_port_cap = (!err && !packet_error) ?
331 MLX_EXT_PORT_CAP_FLAG_EXTENDED_PORT_INFO : 0;
332
333 out:
334 kfree(in_mad);
335 kfree(out_mad);
336 return err;
337 }
338
mlx5_query_mad_ifc_smp_attr_node_info(struct ib_device * ibdev,struct ib_smp * out_mad)339 static int mlx5_query_mad_ifc_smp_attr_node_info(struct ib_device *ibdev,
340 struct ib_smp *out_mad)
341 {
342 struct ib_smp *in_mad;
343 int err;
344
345 in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL);
346 if (!in_mad)
347 return -ENOMEM;
348
349 ib_init_query_mad(in_mad);
350 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
351
352 err = mlx5_MAD_IFC(to_mdev(ibdev), 1, 1, 1, NULL, NULL, in_mad,
353 out_mad);
354
355 kfree(in_mad);
356 return err;
357 }
358
mlx5_query_mad_ifc_system_image_guid(struct ib_device * ibdev,__be64 * sys_image_guid)359 int mlx5_query_mad_ifc_system_image_guid(struct ib_device *ibdev,
360 __be64 *sys_image_guid)
361 {
362 struct ib_smp *out_mad;
363 int err;
364
365 out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
366 if (!out_mad)
367 return -ENOMEM;
368
369 err = mlx5_query_mad_ifc_smp_attr_node_info(ibdev, out_mad);
370 if (err)
371 goto out;
372
373 memcpy(sys_image_guid, out_mad->data + 4, 8);
374
375 out:
376 kfree(out_mad);
377
378 return err;
379 }
380
mlx5_query_mad_ifc_max_pkeys(struct ib_device * ibdev,u16 * max_pkeys)381 int mlx5_query_mad_ifc_max_pkeys(struct ib_device *ibdev,
382 u16 *max_pkeys)
383 {
384 struct ib_smp *out_mad;
385 int err;
386
387 out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
388 if (!out_mad)
389 return -ENOMEM;
390
391 err = mlx5_query_mad_ifc_smp_attr_node_info(ibdev, out_mad);
392 if (err)
393 goto out;
394
395 *max_pkeys = be16_to_cpup((__be16 *)(out_mad->data + 28));
396
397 out:
398 kfree(out_mad);
399
400 return err;
401 }
402
mlx5_query_mad_ifc_vendor_id(struct ib_device * ibdev,u32 * vendor_id)403 int mlx5_query_mad_ifc_vendor_id(struct ib_device *ibdev,
404 u32 *vendor_id)
405 {
406 struct ib_smp *out_mad;
407 int err;
408
409 out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
410 if (!out_mad)
411 return -ENOMEM;
412
413 err = mlx5_query_mad_ifc_smp_attr_node_info(ibdev, out_mad);
414 if (err)
415 goto out;
416
417 *vendor_id = be32_to_cpup((__be32 *)(out_mad->data + 36)) & 0xffff;
418
419 out:
420 kfree(out_mad);
421
422 return err;
423 }
424
mlx5_query_mad_ifc_node_desc(struct mlx5_ib_dev * dev,char * node_desc)425 int mlx5_query_mad_ifc_node_desc(struct mlx5_ib_dev *dev, char *node_desc)
426 {
427 struct ib_smp *in_mad;
428 struct ib_smp *out_mad;
429 int err = -ENOMEM;
430
431 in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL);
432 out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
433 if (!in_mad || !out_mad)
434 goto out;
435
436 ib_init_query_mad(in_mad);
437 in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;
438
439 err = mlx5_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad);
440 if (err)
441 goto out;
442
443 memcpy(node_desc, out_mad->data, IB_DEVICE_NODE_DESC_MAX);
444 out:
445 kfree(in_mad);
446 kfree(out_mad);
447 return err;
448 }
449
mlx5_query_mad_ifc_node_guid(struct mlx5_ib_dev * dev,__be64 * node_guid)450 int mlx5_query_mad_ifc_node_guid(struct mlx5_ib_dev *dev, __be64 *node_guid)
451 {
452 struct ib_smp *in_mad;
453 struct ib_smp *out_mad;
454 int err = -ENOMEM;
455
456 in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL);
457 out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
458 if (!in_mad || !out_mad)
459 goto out;
460
461 ib_init_query_mad(in_mad);
462 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
463
464 err = mlx5_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad);
465 if (err)
466 goto out;
467
468 memcpy(node_guid, out_mad->data + 12, 8);
469 out:
470 kfree(in_mad);
471 kfree(out_mad);
472 return err;
473 }
474
mlx5_query_mad_ifc_pkey(struct ib_device * ibdev,u32 port,u16 index,u16 * pkey)475 int mlx5_query_mad_ifc_pkey(struct ib_device *ibdev, u32 port, u16 index,
476 u16 *pkey)
477 {
478 struct ib_smp *in_mad;
479 struct ib_smp *out_mad;
480 int err = -ENOMEM;
481
482 in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL);
483 out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
484 if (!in_mad || !out_mad)
485 goto out;
486
487 ib_init_query_mad(in_mad);
488 in_mad->attr_id = IB_SMP_ATTR_PKEY_TABLE;
489 in_mad->attr_mod = cpu_to_be32(index / 32);
490
491 err = mlx5_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad,
492 out_mad);
493 if (err)
494 goto out;
495
496 *pkey = be16_to_cpu(((__be16 *)out_mad->data)[index % 32]);
497
498 out:
499 kfree(in_mad);
500 kfree(out_mad);
501 return err;
502 }
503
mlx5_query_mad_ifc_gids(struct ib_device * ibdev,u32 port,int index,union ib_gid * gid)504 int mlx5_query_mad_ifc_gids(struct ib_device *ibdev, u32 port, int index,
505 union ib_gid *gid)
506 {
507 struct ib_smp *in_mad;
508 struct ib_smp *out_mad;
509 int err = -ENOMEM;
510
511 in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL);
512 out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
513 if (!in_mad || !out_mad)
514 goto out;
515
516 ib_init_query_mad(in_mad);
517 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
518 in_mad->attr_mod = cpu_to_be32(port);
519
520 err = mlx5_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad,
521 out_mad);
522 if (err)
523 goto out;
524
525 memcpy(gid->raw, out_mad->data + 8, 8);
526
527 ib_init_query_mad(in_mad);
528 in_mad->attr_id = IB_SMP_ATTR_GUID_INFO;
529 in_mad->attr_mod = cpu_to_be32(index / 8);
530
531 err = mlx5_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad,
532 out_mad);
533 if (err)
534 goto out;
535
536 memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8);
537
538 out:
539 kfree(in_mad);
540 kfree(out_mad);
541 return err;
542 }
543
mlx5_query_mad_ifc_port(struct ib_device * ibdev,u32 port,struct ib_port_attr * props)544 int mlx5_query_mad_ifc_port(struct ib_device *ibdev, u32 port,
545 struct ib_port_attr *props)
546 {
547 struct mlx5_ib_dev *dev = to_mdev(ibdev);
548 struct mlx5_core_dev *mdev = dev->mdev;
549 struct ib_smp *in_mad;
550 struct ib_smp *out_mad;
551 int ext_active_speed;
552 int err = -ENOMEM;
553
554 in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL);
555 out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
556 if (!in_mad || !out_mad)
557 goto out;
558
559 /* props being zeroed by the caller, avoid zeroing it here */
560
561 ib_init_query_mad(in_mad);
562 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
563 in_mad->attr_mod = cpu_to_be32(port);
564
565 err = mlx5_MAD_IFC(dev, 1, 1, port, NULL, NULL, in_mad, out_mad);
566 if (err) {
567 mlx5_ib_warn(dev, "err %d\n", err);
568 goto out;
569 }
570
571 props->lid = be16_to_cpup((__be16 *)(out_mad->data + 16));
572 props->lmc = out_mad->data[34] & 0x7;
573 props->sm_lid = be16_to_cpup((__be16 *)(out_mad->data + 18));
574 props->sm_sl = out_mad->data[36] & 0xf;
575 props->state = out_mad->data[32] & 0xf;
576 props->phys_state = out_mad->data[33] >> 4;
577 props->port_cap_flags = be32_to_cpup((__be32 *)(out_mad->data + 20));
578 props->gid_tbl_len = out_mad->data[50];
579 props->max_msg_sz = 1 << MLX5_CAP_GEN(mdev, log_max_msg);
580 props->pkey_tbl_len = dev->pkey_table_len;
581 props->bad_pkey_cntr = be16_to_cpup((__be16 *)(out_mad->data + 46));
582 props->qkey_viol_cntr = be16_to_cpup((__be16 *)(out_mad->data + 48));
583 props->active_width = out_mad->data[31] & 0xf;
584 props->active_speed = out_mad->data[35] >> 4;
585 props->max_mtu = out_mad->data[41] & 0xf;
586 props->active_mtu = out_mad->data[36] >> 4;
587 props->subnet_timeout = out_mad->data[51] & 0x1f;
588 props->max_vl_num = out_mad->data[37] >> 4;
589 props->init_type_reply = out_mad->data[41] >> 4;
590
591 if (props->port_cap_flags & IB_PORT_CAP_MASK2_SUP) {
592 props->port_cap_flags2 =
593 be16_to_cpup((__be16 *)(out_mad->data + 60));
594
595 if (props->port_cap_flags2 & IB_PORT_LINK_WIDTH_2X_SUP)
596 props->active_width = out_mad->data[31] & 0x1f;
597 }
598
599 /* Check if extended speeds (EDR/FDR/...) are supported */
600 if (props->port_cap_flags & IB_PORT_EXTENDED_SPEEDS_SUP) {
601 ext_active_speed = out_mad->data[62] >> 4;
602
603 switch (ext_active_speed) {
604 case 1:
605 props->active_speed = 16; /* FDR */
606 break;
607 case 2:
608 props->active_speed = 32; /* EDR */
609 break;
610 case 4:
611 if (props->port_cap_flags & IB_PORT_CAP_MASK2_SUP &&
612 props->port_cap_flags2 & IB_PORT_LINK_SPEED_HDR_SUP)
613 props->active_speed = IB_SPEED_HDR;
614 break;
615 case 8:
616 if (props->port_cap_flags & IB_PORT_CAP_MASK2_SUP &&
617 props->port_cap_flags2 & IB_PORT_LINK_SPEED_NDR_SUP)
618 props->active_speed = IB_SPEED_NDR;
619 break;
620 }
621 }
622
623 /* If reported active speed is QDR, check if is FDR-10 */
624 if (props->active_speed == 4) {
625 if (dev->port_caps[port - 1].ext_port_cap &
626 MLX_EXT_PORT_CAP_FLAG_EXTENDED_PORT_INFO) {
627 ib_init_query_mad(in_mad);
628 in_mad->attr_id = MLX5_ATTR_EXTENDED_PORT_INFO;
629 in_mad->attr_mod = cpu_to_be32(port);
630
631 err = mlx5_MAD_IFC(dev, 1, 1, port,
632 NULL, NULL, in_mad, out_mad);
633 if (err)
634 goto out;
635
636 /* Checking LinkSpeedActive for FDR-10 */
637 if (out_mad->data[15] & 0x1)
638 props->active_speed = 8;
639 }
640 }
641
642 out:
643 kfree(in_mad);
644 kfree(out_mad);
645
646 return err;
647 }
648