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
40enum {
41 MLX5_IB_VENDOR_CLASS1 = 0x9,
42 MLX5_IB_VENDOR_CLASS2 = 0xa
43};
44
45static 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
54static 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_num: port, in_mad: (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, inb: in_mad, outb: response_mad, opmod: op_modifier,
73 port);
74}
75
76static 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
109static 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
150static void pma_cnt_ext_assign_ppcnt(struct ib_pma_portcounters_ext *cnt_ext,
151 void *out)
152{
153 void *out_pma = MLX5_ADDR_OF(ppcnt_reg, out,
154 counter_set);
155
156#define MLX5_GET_EXT_CNTR(counter_name) \
157 MLX5_GET64(ib_ext_port_cntrs_grp_data_layout, \
158 out_pma, counter_name##_high)
159
160 cnt_ext->port_xmit_data =
161 cpu_to_be64(MLX5_GET_EXT_CNTR(port_xmit_data) >> 2);
162 cnt_ext->port_rcv_data =
163 cpu_to_be64(MLX5_GET_EXT_CNTR(port_rcv_data) >> 2);
164
165 cnt_ext->port_xmit_packets =
166 cpu_to_be64(MLX5_GET_EXT_CNTR(port_xmit_pkts));
167 cnt_ext->port_rcv_packets =
168 cpu_to_be64(MLX5_GET_EXT_CNTR(port_rcv_pkts));
169
170 cnt_ext->port_unicast_xmit_packets =
171 cpu_to_be64(MLX5_GET_EXT_CNTR(port_unicast_xmit_pkts));
172 cnt_ext->port_unicast_rcv_packets =
173 cpu_to_be64(MLX5_GET_EXT_CNTR(port_unicast_rcv_pkts));
174
175 cnt_ext->port_multicast_xmit_packets =
176 cpu_to_be64(MLX5_GET_EXT_CNTR(port_multicast_xmit_pkts));
177 cnt_ext->port_multicast_rcv_packets =
178 cpu_to_be64(MLX5_GET_EXT_CNTR(port_multicast_rcv_pkts));
179}
180
181static int query_ib_ppcnt(struct mlx5_core_dev *dev, u8 port_num, u8 plane_num,
182 void *out, size_t sz, bool ext)
183{
184 u32 *in;
185 int err;
186
187 in = kvzalloc(sz, GFP_KERNEL);
188 if (!in) {
189 err = -ENOMEM;
190 return err;
191 }
192
193 MLX5_SET(ppcnt_reg, in, local_port, port_num);
194 MLX5_SET(ppcnt_reg, in, plane_ind, plane_num);
195
196 if (ext)
197 MLX5_SET(ppcnt_reg, in, grp,
198 MLX5_INFINIBAND_EXTENDED_PORT_COUNTERS_GROUP);
199 else
200 MLX5_SET(ppcnt_reg, in, grp,
201 MLX5_INFINIBAND_PORT_COUNTERS_GROUP);
202 err = mlx5_core_access_reg(dev, data_in: in, size_in: sz, data_out: out,
203 size_out: sz, reg_num: MLX5_REG_PPCNT, arg: 0, write: 0);
204
205 kvfree(addr: in);
206 return err;
207}
208
209static int process_pma_cmd(struct mlx5_ib_dev *dev, u32 port_num,
210 const struct ib_mad *in_mad, struct ib_mad *out_mad)
211{
212 struct mlx5_core_dev *mdev;
213 bool native_port = true;
214 u32 mdev_port_num;
215 void *out_cnt;
216 int err;
217
218 mdev = mlx5_ib_get_native_port_mdev(dev, ib_port_num: port_num, native_port_num: &mdev_port_num);
219 if (!mdev) {
220 /* Fail to get the native port, likely due to 2nd port is still
221 * unaffiliated. In such case default to 1st port and attached
222 * PF device.
223 */
224 native_port = false;
225 mdev = dev->mdev;
226 mdev_port_num = 1;
227 }
228 if (MLX5_CAP_GEN(dev->mdev, num_ports) == 1 &&
229 !mlx5_core_mp_enabled(dev: mdev) &&
230 dev->ib_dev.type != RDMA_DEVICE_TYPE_SMI) {
231 /* set local port to one for Function-Per-Port HCA. */
232 mdev = dev->mdev;
233 mdev_port_num = 1;
234 }
235
236 /* Declaring support of extended counters */
237 if (in_mad->mad_hdr.attr_id == IB_PMA_CLASS_PORT_INFO) {
238 struct ib_class_port_info cpi = {};
239
240 cpi.capability_mask = IB_PMA_CLASS_CAP_EXT_WIDTH;
241 memcpy((out_mad->data + 40), &cpi, sizeof(cpi));
242 err = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
243 goto done;
244 }
245
246 if (in_mad->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS_EXT) {
247 struct ib_pma_portcounters_ext *pma_cnt_ext =
248 (struct ib_pma_portcounters_ext *)(out_mad->data + 40);
249 int sz = max(MLX5_ST_SZ_BYTES(query_vport_counter_out),
250 MLX5_ST_SZ_BYTES(ppcnt_reg));
251
252 out_cnt = kvzalloc(sz, GFP_KERNEL);
253 if (!out_cnt) {
254 err = IB_MAD_RESULT_FAILURE;
255 goto done;
256 }
257
258 if (dev->ib_dev.type == RDMA_DEVICE_TYPE_SMI) {
259 err = query_ib_ppcnt(dev: mdev, port_num: mdev_port_num,
260 plane_num: port_num, out: out_cnt, sz, ext: 1);
261 if (!err)
262 pma_cnt_ext_assign_ppcnt(cnt_ext: pma_cnt_ext, out: out_cnt);
263 } else {
264 err = mlx5_core_query_vport_counter(dev: mdev, other_vport: 0, vf: 0,
265 port_num: mdev_port_num,
266 out: out_cnt);
267 if (!err)
268 pma_cnt_ext_assign(pma_cnt_ext, out: out_cnt);
269 }
270 } else {
271 struct ib_pma_portcounters *pma_cnt =
272 (struct ib_pma_portcounters *)(out_mad->data + 40);
273 int sz = MLX5_ST_SZ_BYTES(ppcnt_reg);
274
275 out_cnt = kvzalloc(sz, GFP_KERNEL);
276 if (!out_cnt) {
277 err = IB_MAD_RESULT_FAILURE;
278 goto done;
279 }
280
281 if (dev->ib_dev.type == RDMA_DEVICE_TYPE_SMI)
282 err = query_ib_ppcnt(dev: mdev, port_num: mdev_port_num, plane_num: port_num,
283 out: out_cnt, sz, ext: 0);
284 else
285 err = query_ib_ppcnt(dev: mdev, port_num: mdev_port_num, plane_num: 0,
286 out: out_cnt, sz, ext: 0);
287
288 if (!err)
289 pma_cnt_assign(pma_cnt, out: out_cnt);
290 }
291 kvfree(addr: out_cnt);
292 err = err ? IB_MAD_RESULT_FAILURE :
293 IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
294done:
295 if (native_port)
296 mlx5_ib_put_native_port_mdev(dev, port_num);
297 return err;
298}
299
300int mlx5_ib_process_mad(struct ib_device *ibdev, int mad_flags, u32 port_num,
301 const struct ib_wc *in_wc, const struct ib_grh *in_grh,
302 const struct ib_mad *in, struct ib_mad *out,
303 size_t *out_mad_size, u16 *out_mad_pkey_index)
304{
305 struct mlx5_ib_dev *dev = to_mdev(ibdev);
306 u8 mgmt_class = in->mad_hdr.mgmt_class;
307 u8 method = in->mad_hdr.method;
308 u16 slid;
309 int err;
310
311 slid = in_wc ? ib_lid_cpu16(lid: in_wc->slid) :
312 be16_to_cpu(IB_LID_PERMISSIVE);
313
314 if (method == IB_MGMT_METHOD_TRAP && !slid)
315 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
316
317 switch (mgmt_class) {
318 case IB_MGMT_CLASS_SUBN_LID_ROUTED:
319 case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE: {
320 if (method != IB_MGMT_METHOD_GET &&
321 method != IB_MGMT_METHOD_SET &&
322 method != IB_MGMT_METHOD_TRAP_REPRESS)
323 return IB_MAD_RESULT_SUCCESS;
324
325 /* Don't process SMInfo queries -- the SMA can't handle them.
326 */
327 if (in->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO)
328 return IB_MAD_RESULT_SUCCESS;
329 } break;
330 case IB_MGMT_CLASS_PERF_MGMT:
331 if (MLX5_CAP_GEN(dev->mdev, vport_counters) &&
332 method == IB_MGMT_METHOD_GET)
333 return process_pma_cmd(dev, port_num, in_mad: in, out_mad: out);
334 fallthrough;
335 case MLX5_IB_VENDOR_CLASS1:
336 case MLX5_IB_VENDOR_CLASS2:
337 case IB_MGMT_CLASS_CONG_MGMT: {
338 if (method != IB_MGMT_METHOD_GET &&
339 method != IB_MGMT_METHOD_SET)
340 return IB_MAD_RESULT_SUCCESS;
341 } break;
342 default:
343 return IB_MAD_RESULT_SUCCESS;
344 }
345
346 err = mlx5_MAD_IFC(dev: to_mdev(ibdev), ignore_mkey: mad_flags & IB_MAD_IGNORE_MKEY,
347 ignore_bkey: mad_flags & IB_MAD_IGNORE_BKEY, port: port_num, in_wc,
348 in_grh, in_mad: in, response_mad: out);
349 if (err)
350 return IB_MAD_RESULT_FAILURE;
351
352 /* set return bit in status of directed route responses */
353 if (mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
354 out->mad_hdr.status |= cpu_to_be16(1 << 15);
355
356 if (method == IB_MGMT_METHOD_TRAP_REPRESS)
357 /* no response for trap repress */
358 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
359
360 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
361}
362
363int mlx5_query_ext_port_caps(struct mlx5_ib_dev *dev, unsigned int port)
364{
365 struct ib_smp *in_mad;
366 struct ib_smp *out_mad;
367 int err = -ENOMEM;
368 u16 packet_error;
369
370 in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL);
371 out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
372 if (!in_mad || !out_mad)
373 goto out;
374
375 ib_init_query_mad(mad: in_mad);
376 in_mad->attr_id = MLX5_ATTR_EXTENDED_PORT_INFO;
377 in_mad->attr_mod = cpu_to_be32(port);
378
379 err = mlx5_MAD_IFC(dev, ignore_mkey: 1, ignore_bkey: 1, port: 1, NULL, NULL, in_mad, response_mad: out_mad);
380
381 packet_error = be16_to_cpu(out_mad->status);
382
383 dev->port_caps[port - 1].ext_port_cap = (!err && !packet_error) ?
384 MLX_EXT_PORT_CAP_FLAG_EXTENDED_PORT_INFO : 0;
385
386out:
387 kfree(objp: in_mad);
388 kfree(objp: out_mad);
389 return err;
390}
391
392static int mlx5_query_mad_ifc_smp_attr_node_info(struct ib_device *ibdev,
393 struct ib_smp *out_mad)
394{
395 struct ib_smp *in_mad;
396 int err;
397
398 in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL);
399 if (!in_mad)
400 return -ENOMEM;
401
402 ib_init_query_mad(mad: in_mad);
403 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
404
405 err = mlx5_MAD_IFC(dev: to_mdev(ibdev), ignore_mkey: 1, ignore_bkey: 1, port: 1, NULL, NULL, in_mad,
406 response_mad: out_mad);
407
408 kfree(objp: in_mad);
409 return err;
410}
411
412int mlx5_query_mad_ifc_system_image_guid(struct ib_device *ibdev,
413 __be64 *sys_image_guid)
414{
415 struct ib_smp *out_mad;
416 int err;
417
418 out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
419 if (!out_mad)
420 return -ENOMEM;
421
422 err = mlx5_query_mad_ifc_smp_attr_node_info(ibdev, out_mad);
423 if (err)
424 goto out;
425
426 memcpy(sys_image_guid, out_mad->data + 4, 8);
427
428out:
429 kfree(objp: out_mad);
430
431 return err;
432}
433
434int mlx5_query_mad_ifc_max_pkeys(struct ib_device *ibdev,
435 u16 *max_pkeys)
436{
437 struct ib_smp *out_mad;
438 int err;
439
440 out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
441 if (!out_mad)
442 return -ENOMEM;
443
444 err = mlx5_query_mad_ifc_smp_attr_node_info(ibdev, out_mad);
445 if (err)
446 goto out;
447
448 *max_pkeys = be16_to_cpup(p: (__be16 *)(out_mad->data + 28));
449
450out:
451 kfree(objp: out_mad);
452
453 return err;
454}
455
456int mlx5_query_mad_ifc_vendor_id(struct ib_device *ibdev,
457 u32 *vendor_id)
458{
459 struct ib_smp *out_mad;
460 int err;
461
462 out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
463 if (!out_mad)
464 return -ENOMEM;
465
466 err = mlx5_query_mad_ifc_smp_attr_node_info(ibdev, out_mad);
467 if (err)
468 goto out;
469
470 *vendor_id = be32_to_cpup(p: (__be32 *)(out_mad->data + 36)) & 0xffff;
471
472out:
473 kfree(objp: out_mad);
474
475 return err;
476}
477
478int mlx5_query_mad_ifc_node_desc(struct mlx5_ib_dev *dev, char *node_desc)
479{
480 struct ib_smp *in_mad;
481 struct ib_smp *out_mad;
482 int err = -ENOMEM;
483
484 in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL);
485 out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
486 if (!in_mad || !out_mad)
487 goto out;
488
489 ib_init_query_mad(mad: in_mad);
490 in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;
491
492 err = mlx5_MAD_IFC(dev, ignore_mkey: 1, ignore_bkey: 1, port: 1, NULL, NULL, in_mad, response_mad: out_mad);
493 if (err)
494 goto out;
495
496 memcpy(node_desc, out_mad->data, IB_DEVICE_NODE_DESC_MAX);
497out:
498 kfree(objp: in_mad);
499 kfree(objp: out_mad);
500 return err;
501}
502
503int mlx5_query_mad_ifc_node_guid(struct mlx5_ib_dev *dev, __be64 *node_guid)
504{
505 struct ib_smp *in_mad;
506 struct ib_smp *out_mad;
507 int err = -ENOMEM;
508
509 in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL);
510 out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
511 if (!in_mad || !out_mad)
512 goto out;
513
514 ib_init_query_mad(mad: in_mad);
515 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
516
517 err = mlx5_MAD_IFC(dev, ignore_mkey: 1, ignore_bkey: 1, port: 1, NULL, NULL, in_mad, response_mad: out_mad);
518 if (err)
519 goto out;
520
521 memcpy(node_guid, out_mad->data + 12, 8);
522out:
523 kfree(objp: in_mad);
524 kfree(objp: out_mad);
525 return err;
526}
527
528int mlx5_query_mad_ifc_pkey(struct ib_device *ibdev, u32 port, u16 index,
529 u16 *pkey)
530{
531 struct ib_smp *in_mad;
532 struct ib_smp *out_mad;
533 int err = -ENOMEM;
534
535 in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL);
536 out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
537 if (!in_mad || !out_mad)
538 goto out;
539
540 ib_init_query_mad(mad: in_mad);
541 in_mad->attr_id = IB_SMP_ATTR_PKEY_TABLE;
542 in_mad->attr_mod = cpu_to_be32(index / 32);
543
544 err = mlx5_MAD_IFC(dev: to_mdev(ibdev), ignore_mkey: 1, ignore_bkey: 1, port, NULL, NULL, in_mad,
545 response_mad: out_mad);
546 if (err)
547 goto out;
548
549 *pkey = be16_to_cpu(((__be16 *)out_mad->data)[index % 32]);
550
551out:
552 kfree(objp: in_mad);
553 kfree(objp: out_mad);
554 return err;
555}
556
557int mlx5_query_mad_ifc_gids(struct ib_device *ibdev, u32 port, int index,
558 union ib_gid *gid)
559{
560 struct ib_smp *in_mad;
561 struct ib_smp *out_mad;
562 int err = -ENOMEM;
563
564 in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL);
565 out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
566 if (!in_mad || !out_mad)
567 goto out;
568
569 ib_init_query_mad(mad: in_mad);
570 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
571 in_mad->attr_mod = cpu_to_be32(port);
572
573 err = mlx5_MAD_IFC(dev: to_mdev(ibdev), ignore_mkey: 1, ignore_bkey: 1, port, NULL, NULL, in_mad,
574 response_mad: out_mad);
575 if (err)
576 goto out;
577
578 memcpy(gid->raw, out_mad->data + 8, 8);
579
580 ib_init_query_mad(mad: in_mad);
581 in_mad->attr_id = IB_SMP_ATTR_GUID_INFO;
582 in_mad->attr_mod = cpu_to_be32(index / 8);
583
584 err = mlx5_MAD_IFC(dev: to_mdev(ibdev), ignore_mkey: 1, ignore_bkey: 1, port, NULL, NULL, in_mad,
585 response_mad: out_mad);
586 if (err)
587 goto out;
588
589 memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8);
590
591out:
592 kfree(objp: in_mad);
593 kfree(objp: out_mad);
594 return err;
595}
596
597int mlx5_query_mad_ifc_port(struct ib_device *ibdev, u32 port,
598 struct ib_port_attr *props)
599{
600 struct mlx5_ib_dev *dev = to_mdev(ibdev);
601 struct mlx5_core_dev *mdev = dev->mdev;
602 struct ib_smp *in_mad;
603 struct ib_smp *out_mad;
604 int ext_active_speed;
605 int err = -ENOMEM;
606
607 in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL);
608 out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
609 if (!in_mad || !out_mad)
610 goto out;
611
612 /* props being zeroed by the caller, avoid zeroing it here */
613
614 ib_init_query_mad(mad: in_mad);
615 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
616 in_mad->attr_mod = cpu_to_be32(port);
617
618 err = mlx5_MAD_IFC(dev, ignore_mkey: 1, ignore_bkey: 1, port, NULL, NULL, in_mad, response_mad: out_mad);
619 if (err) {
620 mlx5_ib_warn(dev, "err %d\n", err);
621 goto out;
622 }
623
624 props->lid = be16_to_cpup(p: (__be16 *)(out_mad->data + 16));
625 props->lmc = out_mad->data[34] & 0x7;
626 props->sm_lid = be16_to_cpup(p: (__be16 *)(out_mad->data + 18));
627 props->sm_sl = out_mad->data[36] & 0xf;
628 props->state = out_mad->data[32] & 0xf;
629 props->phys_state = out_mad->data[33] >> 4;
630 props->port_cap_flags = be32_to_cpup(p: (__be32 *)(out_mad->data + 20));
631 props->gid_tbl_len = out_mad->data[50];
632 props->max_msg_sz = 1 << MLX5_CAP_GEN(mdev, log_max_msg);
633 props->pkey_tbl_len = dev->pkey_table_len;
634 props->bad_pkey_cntr = be16_to_cpup(p: (__be16 *)(out_mad->data + 46));
635 props->qkey_viol_cntr = be16_to_cpup(p: (__be16 *)(out_mad->data + 48));
636 props->active_width = out_mad->data[31] & 0xf;
637 props->active_speed = out_mad->data[35] >> 4;
638 props->max_mtu = out_mad->data[41] & 0xf;
639 props->active_mtu = out_mad->data[36] >> 4;
640 props->subnet_timeout = out_mad->data[51] & 0x1f;
641 props->max_vl_num = out_mad->data[37] >> 4;
642 props->init_type_reply = out_mad->data[41] >> 4;
643
644 if (props->port_cap_flags & IB_PORT_CAP_MASK2_SUP) {
645 props->port_cap_flags2 =
646 be16_to_cpup(p: (__be16 *)(out_mad->data + 60));
647
648 if (props->port_cap_flags2 & IB_PORT_LINK_WIDTH_2X_SUP)
649 props->active_width = out_mad->data[31] & 0x1f;
650 }
651
652 /* Check if extended speeds (EDR/FDR/...) are supported */
653 if (props->port_cap_flags & IB_PORT_EXTENDED_SPEEDS_SUP) {
654 ext_active_speed = out_mad->data[62] >> 4;
655
656 switch (ext_active_speed) {
657 case 1:
658 props->active_speed = 16; /* FDR */
659 break;
660 case 2:
661 props->active_speed = 32; /* EDR */
662 break;
663 case 4:
664 if (props->port_cap_flags & IB_PORT_CAP_MASK2_SUP &&
665 props->port_cap_flags2 & IB_PORT_LINK_SPEED_HDR_SUP)
666 props->active_speed = IB_SPEED_HDR;
667 break;
668 case 8:
669 if (props->port_cap_flags & IB_PORT_CAP_MASK2_SUP &&
670 props->port_cap_flags2 & IB_PORT_LINK_SPEED_NDR_SUP)
671 props->active_speed = IB_SPEED_NDR;
672 break;
673 }
674 }
675
676 /* Check if extended speeds 2 (XDR/...) are supported */
677 if (props->port_cap_flags & IB_PORT_CAP_MASK2_SUP &&
678 props->port_cap_flags2 & IB_PORT_EXTENDED_SPEEDS2_SUP) {
679 ext_active_speed = (out_mad->data[56] >> 4) & 0x6;
680
681 switch (ext_active_speed) {
682 case 2:
683 if (props->port_cap_flags2 & IB_PORT_LINK_SPEED_XDR_SUP)
684 props->active_speed = IB_SPEED_XDR;
685 break;
686 }
687 }
688
689 /* If reported active speed is QDR, check if is FDR-10 */
690 if (props->active_speed == 4) {
691 if (dev->port_caps[port - 1].ext_port_cap &
692 MLX_EXT_PORT_CAP_FLAG_EXTENDED_PORT_INFO) {
693 ib_init_query_mad(mad: in_mad);
694 in_mad->attr_id = MLX5_ATTR_EXTENDED_PORT_INFO;
695 in_mad->attr_mod = cpu_to_be32(port);
696
697 err = mlx5_MAD_IFC(dev, ignore_mkey: 1, ignore_bkey: 1, port,
698 NULL, NULL, in_mad, response_mad: out_mad);
699 if (err)
700 goto out;
701
702 /* Checking LinkSpeedActive for FDR-10 */
703 if (out_mad->data[15] & 0x1)
704 props->active_speed = 8;
705 }
706 }
707
708out:
709 kfree(objp: in_mad);
710 kfree(objp: out_mad);
711
712 return err;
713}
714

source code of linux/drivers/infiniband/hw/mlx5/mad.c