1 /*
2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Mellanox Technologies Ltd. All rights reserved.
4 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35 #include "core_priv.h"
36
37 #include <linux/slab.h>
38 #include <linux/stat.h>
39 #include <linux/string.h>
40 #include <linux/netdevice.h>
41 #include <linux/ethtool.h>
42
43 #include <rdma/ib_mad.h>
44 #include <rdma/ib_pma.h>
45 #include <rdma/ib_cache.h>
46 #include <rdma/rdma_counter.h>
47 #include <rdma/ib_sysfs.h>
48
49 struct port_table_attribute {
50 struct ib_port_attribute attr;
51 char name[8];
52 int index;
53 __be16 attr_id;
54 };
55
56 struct gid_attr_group {
57 struct ib_port *port;
58 struct kobject kobj;
59 struct attribute_group groups[2];
60 const struct attribute_group *groups_list[3];
61 struct port_table_attribute attrs_list[];
62 };
63
64 struct ib_port {
65 struct kobject kobj;
66 struct ib_device *ibdev;
67 struct gid_attr_group *gid_attr_group;
68 struct hw_stats_port_data *hw_stats_data;
69
70 struct attribute_group groups[3];
71 const struct attribute_group *groups_list[5];
72 u32 port_num;
73 struct port_table_attribute attrs_list[];
74 };
75
76 struct hw_stats_device_attribute {
77 struct device_attribute attr;
78 ssize_t (*show)(struct ib_device *ibdev, struct rdma_hw_stats *stats,
79 unsigned int index, unsigned int port_num, char *buf);
80 ssize_t (*store)(struct ib_device *ibdev, struct rdma_hw_stats *stats,
81 unsigned int index, unsigned int port_num,
82 const char *buf, size_t count);
83 };
84
85 struct hw_stats_port_attribute {
86 struct ib_port_attribute attr;
87 ssize_t (*show)(struct ib_device *ibdev, struct rdma_hw_stats *stats,
88 unsigned int index, unsigned int port_num, char *buf);
89 ssize_t (*store)(struct ib_device *ibdev, struct rdma_hw_stats *stats,
90 unsigned int index, unsigned int port_num,
91 const char *buf, size_t count);
92 };
93
94 struct hw_stats_device_data {
95 struct attribute_group group;
96 struct rdma_hw_stats *stats;
97 struct hw_stats_device_attribute attrs[];
98 };
99
100 struct hw_stats_port_data {
101 struct rdma_hw_stats *stats;
102 struct hw_stats_port_attribute attrs[];
103 };
104
port_attr_show(struct kobject * kobj,struct attribute * attr,char * buf)105 static ssize_t port_attr_show(struct kobject *kobj,
106 struct attribute *attr, char *buf)
107 {
108 struct ib_port_attribute *port_attr =
109 container_of(attr, struct ib_port_attribute, attr);
110 struct ib_port *p = container_of(kobj, struct ib_port, kobj);
111
112 if (!port_attr->show)
113 return -EIO;
114
115 return port_attr->show(p->ibdev, p->port_num, port_attr, buf);
116 }
117
port_attr_store(struct kobject * kobj,struct attribute * attr,const char * buf,size_t count)118 static ssize_t port_attr_store(struct kobject *kobj,
119 struct attribute *attr,
120 const char *buf, size_t count)
121 {
122 struct ib_port_attribute *port_attr =
123 container_of(attr, struct ib_port_attribute, attr);
124 struct ib_port *p = container_of(kobj, struct ib_port, kobj);
125
126 if (!port_attr->store)
127 return -EIO;
128 return port_attr->store(p->ibdev, p->port_num, port_attr, buf, count);
129 }
130
ib_port_sysfs_get_ibdev_kobj(struct kobject * kobj,u32 * port_num)131 struct ib_device *ib_port_sysfs_get_ibdev_kobj(struct kobject *kobj,
132 u32 *port_num)
133 {
134 struct ib_port *port = container_of(kobj, struct ib_port, kobj);
135
136 *port_num = port->port_num;
137 return port->ibdev;
138 }
139 EXPORT_SYMBOL(ib_port_sysfs_get_ibdev_kobj);
140
141 static const struct sysfs_ops port_sysfs_ops = {
142 .show = port_attr_show,
143 .store = port_attr_store
144 };
145
hw_stat_device_show(struct device * dev,struct device_attribute * attr,char * buf)146 static ssize_t hw_stat_device_show(struct device *dev,
147 struct device_attribute *attr, char *buf)
148 {
149 struct hw_stats_device_attribute *stat_attr =
150 container_of(attr, struct hw_stats_device_attribute, attr);
151 struct ib_device *ibdev = container_of(dev, struct ib_device, dev);
152
153 return stat_attr->show(ibdev, ibdev->hw_stats_data->stats,
154 stat_attr - ibdev->hw_stats_data->attrs, 0, buf);
155 }
156
hw_stat_device_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)157 static ssize_t hw_stat_device_store(struct device *dev,
158 struct device_attribute *attr,
159 const char *buf, size_t count)
160 {
161 struct hw_stats_device_attribute *stat_attr =
162 container_of(attr, struct hw_stats_device_attribute, attr);
163 struct ib_device *ibdev = container_of(dev, struct ib_device, dev);
164
165 return stat_attr->store(ibdev, ibdev->hw_stats_data->stats,
166 stat_attr - ibdev->hw_stats_data->attrs, 0, buf,
167 count);
168 }
169
hw_stat_port_show(struct ib_device * ibdev,u32 port_num,struct ib_port_attribute * attr,char * buf)170 static ssize_t hw_stat_port_show(struct ib_device *ibdev, u32 port_num,
171 struct ib_port_attribute *attr, char *buf)
172 {
173 struct hw_stats_port_attribute *stat_attr =
174 container_of(attr, struct hw_stats_port_attribute, attr);
175 struct ib_port *port = ibdev->port_data[port_num].sysfs;
176
177 return stat_attr->show(ibdev, port->hw_stats_data->stats,
178 stat_attr - port->hw_stats_data->attrs,
179 port->port_num, buf);
180 }
181
hw_stat_port_store(struct ib_device * ibdev,u32 port_num,struct ib_port_attribute * attr,const char * buf,size_t count)182 static ssize_t hw_stat_port_store(struct ib_device *ibdev, u32 port_num,
183 struct ib_port_attribute *attr,
184 const char *buf, size_t count)
185 {
186 struct hw_stats_port_attribute *stat_attr =
187 container_of(attr, struct hw_stats_port_attribute, attr);
188 struct ib_port *port = ibdev->port_data[port_num].sysfs;
189
190 return stat_attr->store(ibdev, port->hw_stats_data->stats,
191 stat_attr - port->hw_stats_data->attrs,
192 port->port_num, buf, count);
193 }
194
gid_attr_show(struct kobject * kobj,struct attribute * attr,char * buf)195 static ssize_t gid_attr_show(struct kobject *kobj,
196 struct attribute *attr, char *buf)
197 {
198 struct ib_port_attribute *port_attr =
199 container_of(attr, struct ib_port_attribute, attr);
200 struct ib_port *p = container_of(kobj, struct gid_attr_group,
201 kobj)->port;
202
203 if (!port_attr->show)
204 return -EIO;
205
206 return port_attr->show(p->ibdev, p->port_num, port_attr, buf);
207 }
208
209 static const struct sysfs_ops gid_attr_sysfs_ops = {
210 .show = gid_attr_show
211 };
212
state_show(struct ib_device * ibdev,u32 port_num,struct ib_port_attribute * unused,char * buf)213 static ssize_t state_show(struct ib_device *ibdev, u32 port_num,
214 struct ib_port_attribute *unused, char *buf)
215 {
216 struct ib_port_attr attr;
217 ssize_t ret;
218
219 ret = ib_query_port(ibdev, port_num, &attr);
220 if (ret)
221 return ret;
222
223 return sysfs_emit(buf, "%d: %s\n", attr.state,
224 ib_port_state_to_str(attr.state));
225 }
226
lid_show(struct ib_device * ibdev,u32 port_num,struct ib_port_attribute * unused,char * buf)227 static ssize_t lid_show(struct ib_device *ibdev, u32 port_num,
228 struct ib_port_attribute *unused, char *buf)
229 {
230 struct ib_port_attr attr;
231 ssize_t ret;
232
233 ret = ib_query_port(ibdev, port_num, &attr);
234 if (ret)
235 return ret;
236
237 return sysfs_emit(buf, "0x%x\n", attr.lid);
238 }
239
lid_mask_count_show(struct ib_device * ibdev,u32 port_num,struct ib_port_attribute * unused,char * buf)240 static ssize_t lid_mask_count_show(struct ib_device *ibdev, u32 port_num,
241 struct ib_port_attribute *unused, char *buf)
242 {
243 struct ib_port_attr attr;
244 ssize_t ret;
245
246 ret = ib_query_port(ibdev, port_num, &attr);
247 if (ret)
248 return ret;
249
250 return sysfs_emit(buf, "%u\n", attr.lmc);
251 }
252
sm_lid_show(struct ib_device * ibdev,u32 port_num,struct ib_port_attribute * unused,char * buf)253 static ssize_t sm_lid_show(struct ib_device *ibdev, u32 port_num,
254 struct ib_port_attribute *unused, char *buf)
255 {
256 struct ib_port_attr attr;
257 ssize_t ret;
258
259 ret = ib_query_port(ibdev, port_num, &attr);
260 if (ret)
261 return ret;
262
263 return sysfs_emit(buf, "0x%x\n", attr.sm_lid);
264 }
265
sm_sl_show(struct ib_device * ibdev,u32 port_num,struct ib_port_attribute * unused,char * buf)266 static ssize_t sm_sl_show(struct ib_device *ibdev, u32 port_num,
267 struct ib_port_attribute *unused, char *buf)
268 {
269 struct ib_port_attr attr;
270 ssize_t ret;
271
272 ret = ib_query_port(ibdev, port_num, &attr);
273 if (ret)
274 return ret;
275
276 return sysfs_emit(buf, "%u\n", attr.sm_sl);
277 }
278
cap_mask_show(struct ib_device * ibdev,u32 port_num,struct ib_port_attribute * unused,char * buf)279 static ssize_t cap_mask_show(struct ib_device *ibdev, u32 port_num,
280 struct ib_port_attribute *unused, char *buf)
281 {
282 struct ib_port_attr attr;
283 ssize_t ret;
284
285 ret = ib_query_port(ibdev, port_num, &attr);
286 if (ret)
287 return ret;
288
289 return sysfs_emit(buf, "0x%08x\n", attr.port_cap_flags);
290 }
291
rate_show(struct ib_device * ibdev,u32 port_num,struct ib_port_attribute * unused,char * buf)292 static ssize_t rate_show(struct ib_device *ibdev, u32 port_num,
293 struct ib_port_attribute *unused, char *buf)
294 {
295 struct ib_port_attr attr;
296 char *speed = "";
297 int rate; /* in deci-Gb/sec */
298 ssize_t ret;
299
300 ret = ib_query_port(ibdev, port_num, &attr);
301 if (ret)
302 return ret;
303
304 switch (attr.active_speed) {
305 case IB_SPEED_DDR:
306 speed = " DDR";
307 rate = 50;
308 break;
309 case IB_SPEED_QDR:
310 speed = " QDR";
311 rate = 100;
312 break;
313 case IB_SPEED_FDR10:
314 speed = " FDR10";
315 rate = 100;
316 break;
317 case IB_SPEED_FDR:
318 speed = " FDR";
319 rate = 140;
320 break;
321 case IB_SPEED_EDR:
322 speed = " EDR";
323 rate = 250;
324 break;
325 case IB_SPEED_HDR:
326 speed = " HDR";
327 rate = 500;
328 break;
329 case IB_SPEED_NDR:
330 speed = " NDR";
331 rate = 1000;
332 break;
333 case IB_SPEED_XDR:
334 speed = " XDR";
335 rate = 2000;
336 break;
337 case IB_SPEED_SDR:
338 default: /* default to SDR for invalid rates */
339 speed = " SDR";
340 rate = 25;
341 break;
342 }
343
344 rate *= ib_width_enum_to_int(attr.active_width);
345 if (rate < 0)
346 return -EINVAL;
347
348 return sysfs_emit(buf, "%d%s Gb/sec (%dX%s)\n", rate / 10,
349 rate % 10 ? ".5" : "",
350 ib_width_enum_to_int(attr.active_width), speed);
351 }
352
phys_state_to_str(enum ib_port_phys_state phys_state)353 static const char *phys_state_to_str(enum ib_port_phys_state phys_state)
354 {
355 static const char *phys_state_str[] = {
356 "<unknown>",
357 "Sleep",
358 "Polling",
359 "Disabled",
360 "PortConfigurationTraining",
361 "LinkUp",
362 "LinkErrorRecovery",
363 "Phy Test",
364 };
365
366 if (phys_state < ARRAY_SIZE(phys_state_str))
367 return phys_state_str[phys_state];
368 return "<unknown>";
369 }
370
phys_state_show(struct ib_device * ibdev,u32 port_num,struct ib_port_attribute * unused,char * buf)371 static ssize_t phys_state_show(struct ib_device *ibdev, u32 port_num,
372 struct ib_port_attribute *unused, char *buf)
373 {
374 struct ib_port_attr attr;
375
376 ssize_t ret;
377
378 ret = ib_query_port(ibdev, port_num, &attr);
379 if (ret)
380 return ret;
381
382 return sysfs_emit(buf, "%u: %s\n", attr.phys_state,
383 phys_state_to_str(attr.phys_state));
384 }
385
link_layer_show(struct ib_device * ibdev,u32 port_num,struct ib_port_attribute * unused,char * buf)386 static ssize_t link_layer_show(struct ib_device *ibdev, u32 port_num,
387 struct ib_port_attribute *unused, char *buf)
388 {
389 const char *output;
390
391 switch (rdma_port_get_link_layer(ibdev, port_num)) {
392 case IB_LINK_LAYER_INFINIBAND:
393 output = "InfiniBand";
394 break;
395 case IB_LINK_LAYER_ETHERNET:
396 output = "Ethernet";
397 break;
398 default:
399 output = "Unknown";
400 break;
401 }
402
403 return sysfs_emit(buf, "%s\n", output);
404 }
405
406 static IB_PORT_ATTR_RO(state);
407 static IB_PORT_ATTR_RO(lid);
408 static IB_PORT_ATTR_RO(lid_mask_count);
409 static IB_PORT_ATTR_RO(sm_lid);
410 static IB_PORT_ATTR_RO(sm_sl);
411 static IB_PORT_ATTR_RO(cap_mask);
412 static IB_PORT_ATTR_RO(rate);
413 static IB_PORT_ATTR_RO(phys_state);
414 static IB_PORT_ATTR_RO(link_layer);
415
416 static struct attribute *port_default_attrs[] = {
417 &ib_port_attr_state.attr,
418 &ib_port_attr_lid.attr,
419 &ib_port_attr_lid_mask_count.attr,
420 &ib_port_attr_sm_lid.attr,
421 &ib_port_attr_sm_sl.attr,
422 &ib_port_attr_cap_mask.attr,
423 &ib_port_attr_rate.attr,
424 &ib_port_attr_phys_state.attr,
425 &ib_port_attr_link_layer.attr,
426 NULL
427 };
428 ATTRIBUTE_GROUPS(port_default);
429
print_ndev(const struct ib_gid_attr * gid_attr,char * buf)430 static ssize_t print_ndev(const struct ib_gid_attr *gid_attr, char *buf)
431 {
432 struct net_device *ndev;
433 int ret = -EINVAL;
434
435 rcu_read_lock();
436 ndev = rcu_dereference(gid_attr->ndev);
437 if (ndev)
438 ret = sysfs_emit(buf, "%s\n", ndev->name);
439 rcu_read_unlock();
440 return ret;
441 }
442
print_gid_type(const struct ib_gid_attr * gid_attr,char * buf)443 static ssize_t print_gid_type(const struct ib_gid_attr *gid_attr, char *buf)
444 {
445 return sysfs_emit(buf, "%s\n",
446 ib_cache_gid_type_str(gid_attr->gid_type));
447 }
448
_show_port_gid_attr(struct ib_device * ibdev,u32 port_num,struct ib_port_attribute * attr,char * buf,ssize_t (* print)(const struct ib_gid_attr * gid_attr,char * buf))449 static ssize_t _show_port_gid_attr(
450 struct ib_device *ibdev, u32 port_num, struct ib_port_attribute *attr,
451 char *buf,
452 ssize_t (*print)(const struct ib_gid_attr *gid_attr, char *buf))
453 {
454 struct port_table_attribute *tab_attr =
455 container_of(attr, struct port_table_attribute, attr);
456 const struct ib_gid_attr *gid_attr;
457 ssize_t ret;
458
459 gid_attr = rdma_get_gid_attr(ibdev, port_num, tab_attr->index);
460 if (IS_ERR(gid_attr))
461 /* -EINVAL is returned for user space compatibility reasons. */
462 return -EINVAL;
463
464 ret = print(gid_attr, buf);
465 rdma_put_gid_attr(gid_attr);
466 return ret;
467 }
468
show_port_gid(struct ib_device * ibdev,u32 port_num,struct ib_port_attribute * attr,char * buf)469 static ssize_t show_port_gid(struct ib_device *ibdev, u32 port_num,
470 struct ib_port_attribute *attr, char *buf)
471 {
472 struct port_table_attribute *tab_attr =
473 container_of(attr, struct port_table_attribute, attr);
474 const struct ib_gid_attr *gid_attr;
475 int len;
476
477 gid_attr = rdma_get_gid_attr(ibdev, port_num, tab_attr->index);
478 if (IS_ERR(gid_attr)) {
479 const union ib_gid zgid = {};
480
481 /* If reading GID fails, it is likely due to GID entry being
482 * empty (invalid) or reserved GID in the table. User space
483 * expects to read GID table entries as long as it given index
484 * is within GID table size. Administrative/debugging tool
485 * fails to query rest of the GID entries if it hits error
486 * while querying a GID of the given index. To avoid user
487 * space throwing such error on fail to read gid, return zero
488 * GID as before. This maintains backward compatibility.
489 */
490 return sysfs_emit(buf, "%pI6\n", zgid.raw);
491 }
492
493 len = sysfs_emit(buf, "%pI6\n", gid_attr->gid.raw);
494 rdma_put_gid_attr(gid_attr);
495 return len;
496 }
497
show_port_gid_attr_ndev(struct ib_device * ibdev,u32 port_num,struct ib_port_attribute * attr,char * buf)498 static ssize_t show_port_gid_attr_ndev(struct ib_device *ibdev, u32 port_num,
499 struct ib_port_attribute *attr,
500 char *buf)
501 {
502 return _show_port_gid_attr(ibdev, port_num, attr, buf, print_ndev);
503 }
504
show_port_gid_attr_gid_type(struct ib_device * ibdev,u32 port_num,struct ib_port_attribute * attr,char * buf)505 static ssize_t show_port_gid_attr_gid_type(struct ib_device *ibdev,
506 u32 port_num,
507 struct ib_port_attribute *attr,
508 char *buf)
509 {
510 return _show_port_gid_attr(ibdev, port_num, attr, buf, print_gid_type);
511 }
512
show_port_pkey(struct ib_device * ibdev,u32 port_num,struct ib_port_attribute * attr,char * buf)513 static ssize_t show_port_pkey(struct ib_device *ibdev, u32 port_num,
514 struct ib_port_attribute *attr, char *buf)
515 {
516 struct port_table_attribute *tab_attr =
517 container_of(attr, struct port_table_attribute, attr);
518 u16 pkey;
519 int ret;
520
521 ret = ib_query_pkey(ibdev, port_num, tab_attr->index, &pkey);
522 if (ret)
523 return ret;
524
525 return sysfs_emit(buf, "0x%04x\n", pkey);
526 }
527
528 #define PORT_PMA_ATTR(_name, _counter, _width, _offset) \
529 struct port_table_attribute port_pma_attr_##_name = { \
530 .attr = __ATTR(_name, S_IRUGO, show_pma_counter, NULL), \
531 .index = (_offset) | ((_width) << 16) | ((_counter) << 24), \
532 .attr_id = IB_PMA_PORT_COUNTERS, \
533 }
534
535 #define PORT_PMA_ATTR_EXT(_name, _width, _offset) \
536 struct port_table_attribute port_pma_attr_ext_##_name = { \
537 .attr = __ATTR(_name, S_IRUGO, show_pma_counter, NULL), \
538 .index = (_offset) | ((_width) << 16), \
539 .attr_id = IB_PMA_PORT_COUNTERS_EXT, \
540 }
541
542 /*
543 * Get a Perfmgmt MAD block of data.
544 * Returns error code or the number of bytes retrieved.
545 */
get_perf_mad(struct ib_device * dev,int port_num,__be16 attr,void * data,int offset,size_t size)546 static int get_perf_mad(struct ib_device *dev, int port_num, __be16 attr,
547 void *data, int offset, size_t size)
548 {
549 struct ib_mad *in_mad;
550 struct ib_mad *out_mad;
551 size_t mad_size = sizeof(*out_mad);
552 u16 out_mad_pkey_index = 0;
553 ssize_t ret;
554
555 if (!dev->ops.process_mad)
556 return -ENOSYS;
557
558 in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL);
559 out_mad = kzalloc(sizeof(*out_mad), GFP_KERNEL);
560 if (!in_mad || !out_mad) {
561 ret = -ENOMEM;
562 goto out;
563 }
564
565 in_mad->mad_hdr.base_version = 1;
566 in_mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_PERF_MGMT;
567 in_mad->mad_hdr.class_version = 1;
568 in_mad->mad_hdr.method = IB_MGMT_METHOD_GET;
569 in_mad->mad_hdr.attr_id = attr;
570
571 if (attr != IB_PMA_CLASS_PORT_INFO)
572 in_mad->data[41] = port_num; /* PortSelect field */
573
574 if ((dev->ops.process_mad(dev, IB_MAD_IGNORE_MKEY, port_num, NULL, NULL,
575 in_mad, out_mad, &mad_size,
576 &out_mad_pkey_index) &
577 (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) !=
578 (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) {
579 ret = -EINVAL;
580 goto out;
581 }
582 memcpy(data, out_mad->data + offset, size);
583 ret = size;
584 out:
585 kfree(in_mad);
586 kfree(out_mad);
587 return ret;
588 }
589
show_pma_counter(struct ib_device * ibdev,u32 port_num,struct ib_port_attribute * attr,char * buf)590 static ssize_t show_pma_counter(struct ib_device *ibdev, u32 port_num,
591 struct ib_port_attribute *attr, char *buf)
592 {
593 struct port_table_attribute *tab_attr =
594 container_of(attr, struct port_table_attribute, attr);
595 int offset = tab_attr->index & 0xffff;
596 int width = (tab_attr->index >> 16) & 0xff;
597 int ret;
598 u8 data[8];
599 int len;
600
601 ret = get_perf_mad(ibdev, port_num, tab_attr->attr_id, &data,
602 40 + offset / 8, sizeof(data));
603 if (ret < 0)
604 return ret;
605
606 switch (width) {
607 case 4:
608 len = sysfs_emit(buf, "%d\n",
609 (*data >> (4 - (offset % 8))) & 0xf);
610 break;
611 case 8:
612 len = sysfs_emit(buf, "%u\n", *data);
613 break;
614 case 16:
615 len = sysfs_emit(buf, "%u\n", be16_to_cpup((__be16 *)data));
616 break;
617 case 32:
618 len = sysfs_emit(buf, "%u\n", be32_to_cpup((__be32 *)data));
619 break;
620 case 64:
621 len = sysfs_emit(buf, "%llu\n", be64_to_cpup((__be64 *)data));
622 break;
623 default:
624 len = 0;
625 break;
626 }
627
628 return len;
629 }
630
631 static PORT_PMA_ATTR(symbol_error , 0, 16, 32);
632 static PORT_PMA_ATTR(link_error_recovery , 1, 8, 48);
633 static PORT_PMA_ATTR(link_downed , 2, 8, 56);
634 static PORT_PMA_ATTR(port_rcv_errors , 3, 16, 64);
635 static PORT_PMA_ATTR(port_rcv_remote_physical_errors, 4, 16, 80);
636 static PORT_PMA_ATTR(port_rcv_switch_relay_errors , 5, 16, 96);
637 static PORT_PMA_ATTR(port_xmit_discards , 6, 16, 112);
638 static PORT_PMA_ATTR(port_xmit_constraint_errors , 7, 8, 128);
639 static PORT_PMA_ATTR(port_rcv_constraint_errors , 8, 8, 136);
640 static PORT_PMA_ATTR(local_link_integrity_errors , 9, 4, 152);
641 static PORT_PMA_ATTR(excessive_buffer_overrun_errors, 10, 4, 156);
642 static PORT_PMA_ATTR(VL15_dropped , 11, 16, 176);
643 static PORT_PMA_ATTR(port_xmit_data , 12, 32, 192);
644 static PORT_PMA_ATTR(port_rcv_data , 13, 32, 224);
645 static PORT_PMA_ATTR(port_xmit_packets , 14, 32, 256);
646 static PORT_PMA_ATTR(port_rcv_packets , 15, 32, 288);
647 static PORT_PMA_ATTR(port_xmit_wait , 0, 32, 320);
648
649 /*
650 * Counters added by extended set
651 */
652 static PORT_PMA_ATTR_EXT(port_xmit_data , 64, 64);
653 static PORT_PMA_ATTR_EXT(port_rcv_data , 64, 128);
654 static PORT_PMA_ATTR_EXT(port_xmit_packets , 64, 192);
655 static PORT_PMA_ATTR_EXT(port_rcv_packets , 64, 256);
656 static PORT_PMA_ATTR_EXT(unicast_xmit_packets , 64, 320);
657 static PORT_PMA_ATTR_EXT(unicast_rcv_packets , 64, 384);
658 static PORT_PMA_ATTR_EXT(multicast_xmit_packets , 64, 448);
659 static PORT_PMA_ATTR_EXT(multicast_rcv_packets , 64, 512);
660
661 static struct attribute *pma_attrs[] = {
662 &port_pma_attr_symbol_error.attr.attr,
663 &port_pma_attr_link_error_recovery.attr.attr,
664 &port_pma_attr_link_downed.attr.attr,
665 &port_pma_attr_port_rcv_errors.attr.attr,
666 &port_pma_attr_port_rcv_remote_physical_errors.attr.attr,
667 &port_pma_attr_port_rcv_switch_relay_errors.attr.attr,
668 &port_pma_attr_port_xmit_discards.attr.attr,
669 &port_pma_attr_port_xmit_constraint_errors.attr.attr,
670 &port_pma_attr_port_rcv_constraint_errors.attr.attr,
671 &port_pma_attr_local_link_integrity_errors.attr.attr,
672 &port_pma_attr_excessive_buffer_overrun_errors.attr.attr,
673 &port_pma_attr_VL15_dropped.attr.attr,
674 &port_pma_attr_port_xmit_data.attr.attr,
675 &port_pma_attr_port_rcv_data.attr.attr,
676 &port_pma_attr_port_xmit_packets.attr.attr,
677 &port_pma_attr_port_rcv_packets.attr.attr,
678 &port_pma_attr_port_xmit_wait.attr.attr,
679 NULL
680 };
681
682 static struct attribute *pma_attrs_ext[] = {
683 &port_pma_attr_symbol_error.attr.attr,
684 &port_pma_attr_link_error_recovery.attr.attr,
685 &port_pma_attr_link_downed.attr.attr,
686 &port_pma_attr_port_rcv_errors.attr.attr,
687 &port_pma_attr_port_rcv_remote_physical_errors.attr.attr,
688 &port_pma_attr_port_rcv_switch_relay_errors.attr.attr,
689 &port_pma_attr_port_xmit_discards.attr.attr,
690 &port_pma_attr_port_xmit_constraint_errors.attr.attr,
691 &port_pma_attr_port_rcv_constraint_errors.attr.attr,
692 &port_pma_attr_local_link_integrity_errors.attr.attr,
693 &port_pma_attr_excessive_buffer_overrun_errors.attr.attr,
694 &port_pma_attr_VL15_dropped.attr.attr,
695 &port_pma_attr_ext_port_xmit_data.attr.attr,
696 &port_pma_attr_ext_port_rcv_data.attr.attr,
697 &port_pma_attr_ext_port_xmit_packets.attr.attr,
698 &port_pma_attr_port_xmit_wait.attr.attr,
699 &port_pma_attr_ext_port_rcv_packets.attr.attr,
700 &port_pma_attr_ext_unicast_rcv_packets.attr.attr,
701 &port_pma_attr_ext_unicast_xmit_packets.attr.attr,
702 &port_pma_attr_ext_multicast_rcv_packets.attr.attr,
703 &port_pma_attr_ext_multicast_xmit_packets.attr.attr,
704 NULL
705 };
706
707 static struct attribute *pma_attrs_noietf[] = {
708 &port_pma_attr_symbol_error.attr.attr,
709 &port_pma_attr_link_error_recovery.attr.attr,
710 &port_pma_attr_link_downed.attr.attr,
711 &port_pma_attr_port_rcv_errors.attr.attr,
712 &port_pma_attr_port_rcv_remote_physical_errors.attr.attr,
713 &port_pma_attr_port_rcv_switch_relay_errors.attr.attr,
714 &port_pma_attr_port_xmit_discards.attr.attr,
715 &port_pma_attr_port_xmit_constraint_errors.attr.attr,
716 &port_pma_attr_port_rcv_constraint_errors.attr.attr,
717 &port_pma_attr_local_link_integrity_errors.attr.attr,
718 &port_pma_attr_excessive_buffer_overrun_errors.attr.attr,
719 &port_pma_attr_VL15_dropped.attr.attr,
720 &port_pma_attr_ext_port_xmit_data.attr.attr,
721 &port_pma_attr_ext_port_rcv_data.attr.attr,
722 &port_pma_attr_ext_port_xmit_packets.attr.attr,
723 &port_pma_attr_ext_port_rcv_packets.attr.attr,
724 &port_pma_attr_port_xmit_wait.attr.attr,
725 NULL
726 };
727
728 static const struct attribute_group pma_group = {
729 .name = "counters",
730 .attrs = pma_attrs
731 };
732
733 static const struct attribute_group pma_group_ext = {
734 .name = "counters",
735 .attrs = pma_attrs_ext
736 };
737
738 static const struct attribute_group pma_group_noietf = {
739 .name = "counters",
740 .attrs = pma_attrs_noietf
741 };
742
ib_port_release(struct kobject * kobj)743 static void ib_port_release(struct kobject *kobj)
744 {
745 struct ib_port *port = container_of(kobj, struct ib_port, kobj);
746 int i;
747
748 for (i = 0; i != ARRAY_SIZE(port->groups); i++)
749 kfree(port->groups[i].attrs);
750 if (port->hw_stats_data)
751 rdma_free_hw_stats_struct(port->hw_stats_data->stats);
752 kfree(port->hw_stats_data);
753 kvfree(port);
754 }
755
ib_port_gid_attr_release(struct kobject * kobj)756 static void ib_port_gid_attr_release(struct kobject *kobj)
757 {
758 struct gid_attr_group *gid_attr_group =
759 container_of(kobj, struct gid_attr_group, kobj);
760 int i;
761
762 for (i = 0; i != ARRAY_SIZE(gid_attr_group->groups); i++)
763 kfree(gid_attr_group->groups[i].attrs);
764 kfree(gid_attr_group);
765 }
766
767 static struct kobj_type port_type = {
768 .release = ib_port_release,
769 .sysfs_ops = &port_sysfs_ops,
770 .default_groups = port_default_groups,
771 };
772
773 static struct kobj_type gid_attr_type = {
774 .sysfs_ops = &gid_attr_sysfs_ops,
775 .release = ib_port_gid_attr_release
776 };
777
778 /*
779 * Figure out which counter table to use depending on
780 * the device capabilities.
781 */
get_counter_table(struct ib_device * dev,int port_num)782 static const struct attribute_group *get_counter_table(struct ib_device *dev,
783 int port_num)
784 {
785 struct ib_class_port_info cpi;
786
787 if (get_perf_mad(dev, port_num, IB_PMA_CLASS_PORT_INFO,
788 &cpi, 40, sizeof(cpi)) >= 0) {
789 if (cpi.capability_mask & IB_PMA_CLASS_CAP_EXT_WIDTH)
790 /* We have extended counters */
791 return &pma_group_ext;
792
793 if (cpi.capability_mask & IB_PMA_CLASS_CAP_EXT_WIDTH_NOIETF)
794 /* But not the IETF ones */
795 return &pma_group_noietf;
796 }
797
798 /* Fall back to normal counters */
799 return &pma_group;
800 }
801
update_hw_stats(struct ib_device * dev,struct rdma_hw_stats * stats,u32 port_num,int index)802 static int update_hw_stats(struct ib_device *dev, struct rdma_hw_stats *stats,
803 u32 port_num, int index)
804 {
805 int ret;
806
807 if (time_is_after_eq_jiffies(stats->timestamp + stats->lifespan))
808 return 0;
809 ret = dev->ops.get_hw_stats(dev, stats, port_num, index);
810 if (ret < 0)
811 return ret;
812 if (ret == stats->num_counters)
813 stats->timestamp = jiffies;
814
815 return 0;
816 }
817
print_hw_stat(struct ib_device * dev,int port_num,struct rdma_hw_stats * stats,int index,char * buf)818 static int print_hw_stat(struct ib_device *dev, int port_num,
819 struct rdma_hw_stats *stats, int index, char *buf)
820 {
821 u64 v = rdma_counter_get_hwstat_value(dev, port_num, index);
822
823 return sysfs_emit(buf, "%llu\n", stats->value[index] + v);
824 }
825
show_hw_stats(struct ib_device * ibdev,struct rdma_hw_stats * stats,unsigned int index,unsigned int port_num,char * buf)826 static ssize_t show_hw_stats(struct ib_device *ibdev,
827 struct rdma_hw_stats *stats, unsigned int index,
828 unsigned int port_num, char *buf)
829 {
830 int ret;
831
832 mutex_lock(&stats->lock);
833 ret = update_hw_stats(ibdev, stats, port_num, index);
834 if (ret)
835 goto unlock;
836 ret = print_hw_stat(ibdev, port_num, stats, index, buf);
837 unlock:
838 mutex_unlock(&stats->lock);
839
840 return ret;
841 }
842
show_stats_lifespan(struct ib_device * ibdev,struct rdma_hw_stats * stats,unsigned int index,unsigned int port_num,char * buf)843 static ssize_t show_stats_lifespan(struct ib_device *ibdev,
844 struct rdma_hw_stats *stats,
845 unsigned int index, unsigned int port_num,
846 char *buf)
847 {
848 int msecs;
849
850 mutex_lock(&stats->lock);
851 msecs = jiffies_to_msecs(stats->lifespan);
852 mutex_unlock(&stats->lock);
853
854 return sysfs_emit(buf, "%d\n", msecs);
855 }
856
set_stats_lifespan(struct ib_device * ibdev,struct rdma_hw_stats * stats,unsigned int index,unsigned int port_num,const char * buf,size_t count)857 static ssize_t set_stats_lifespan(struct ib_device *ibdev,
858 struct rdma_hw_stats *stats,
859 unsigned int index, unsigned int port_num,
860 const char *buf, size_t count)
861 {
862 int msecs;
863 int jiffies;
864 int ret;
865
866 ret = kstrtoint(buf, 10, &msecs);
867 if (ret)
868 return ret;
869 if (msecs < 0 || msecs > 10000)
870 return -EINVAL;
871 jiffies = msecs_to_jiffies(msecs);
872
873 mutex_lock(&stats->lock);
874 stats->lifespan = jiffies;
875 mutex_unlock(&stats->lock);
876
877 return count;
878 }
879
880 static struct hw_stats_device_data *
alloc_hw_stats_device(struct ib_device * ibdev)881 alloc_hw_stats_device(struct ib_device *ibdev)
882 {
883 struct hw_stats_device_data *data;
884 struct rdma_hw_stats *stats;
885
886 if (!ibdev->ops.alloc_hw_device_stats)
887 return ERR_PTR(-EOPNOTSUPP);
888 stats = ibdev->ops.alloc_hw_device_stats(ibdev);
889 if (!stats)
890 return ERR_PTR(-ENOMEM);
891 if (!stats->descs || stats->num_counters <= 0)
892 goto err_free_stats;
893
894 /*
895 * Two extra attribue elements here, one for the lifespan entry and
896 * one to NULL terminate the list for the sysfs core code
897 */
898 data = kzalloc(struct_size(data, attrs, size_add(stats->num_counters, 1)),
899 GFP_KERNEL);
900 if (!data)
901 goto err_free_stats;
902 data->group.attrs = kcalloc(stats->num_counters + 2,
903 sizeof(*data->group.attrs), GFP_KERNEL);
904 if (!data->group.attrs)
905 goto err_free_data;
906
907 data->group.name = "hw_counters";
908 data->stats = stats;
909 return data;
910
911 err_free_data:
912 kfree(data);
913 err_free_stats:
914 rdma_free_hw_stats_struct(stats);
915 return ERR_PTR(-ENOMEM);
916 }
917
ib_device_release_hw_stats(struct hw_stats_device_data * data)918 void ib_device_release_hw_stats(struct hw_stats_device_data *data)
919 {
920 kfree(data->group.attrs);
921 rdma_free_hw_stats_struct(data->stats);
922 kfree(data);
923 }
924
ib_setup_device_attrs(struct ib_device * ibdev)925 int ib_setup_device_attrs(struct ib_device *ibdev)
926 {
927 struct hw_stats_device_attribute *attr;
928 struct hw_stats_device_data *data;
929 bool opstat_skipped = false;
930 int i, ret, pos = 0;
931
932 data = alloc_hw_stats_device(ibdev);
933 if (IS_ERR(data)) {
934 if (PTR_ERR(data) == -EOPNOTSUPP)
935 return 0;
936 return PTR_ERR(data);
937 }
938 ibdev->hw_stats_data = data;
939
940 ret = ibdev->ops.get_hw_stats(ibdev, data->stats, 0,
941 data->stats->num_counters);
942 if (ret != data->stats->num_counters) {
943 if (WARN_ON(ret >= 0))
944 return -EINVAL;
945 return ret;
946 }
947
948 data->stats->timestamp = jiffies;
949
950 for (i = 0; i < data->stats->num_counters; i++) {
951 if (data->stats->descs[i].flags & IB_STAT_FLAG_OPTIONAL) {
952 opstat_skipped = true;
953 continue;
954 }
955
956 WARN_ON(opstat_skipped);
957 attr = &data->attrs[pos];
958 sysfs_attr_init(&attr->attr.attr);
959 attr->attr.attr.name = data->stats->descs[i].name;
960 attr->attr.attr.mode = 0444;
961 attr->attr.show = hw_stat_device_show;
962 attr->show = show_hw_stats;
963 data->group.attrs[pos] = &attr->attr.attr;
964 pos++;
965 }
966
967 attr = &data->attrs[pos];
968 sysfs_attr_init(&attr->attr.attr);
969 attr->attr.attr.name = "lifespan";
970 attr->attr.attr.mode = 0644;
971 attr->attr.show = hw_stat_device_show;
972 attr->show = show_stats_lifespan;
973 attr->attr.store = hw_stat_device_store;
974 attr->store = set_stats_lifespan;
975 data->group.attrs[pos] = &attr->attr.attr;
976 for (i = 0; i != ARRAY_SIZE(ibdev->groups); i++)
977 if (!ibdev->groups[i]) {
978 ibdev->groups[i] = &data->group;
979 ibdev->hw_stats_attr_index = i;
980 return 0;
981 }
982 WARN(true, "struct ib_device->groups is too small");
983 return -EINVAL;
984 }
985
986 static struct hw_stats_port_data *
alloc_hw_stats_port(struct ib_port * port,struct attribute_group * group)987 alloc_hw_stats_port(struct ib_port *port, struct attribute_group *group)
988 {
989 struct ib_device *ibdev = port->ibdev;
990 struct hw_stats_port_data *data;
991 struct rdma_hw_stats *stats;
992
993 if (!ibdev->ops.alloc_hw_port_stats)
994 return ERR_PTR(-EOPNOTSUPP);
995 stats = ibdev->ops.alloc_hw_port_stats(port->ibdev, port->port_num);
996 if (!stats)
997 return ERR_PTR(-ENOMEM);
998 if (!stats->descs || stats->num_counters <= 0)
999 goto err_free_stats;
1000
1001 /*
1002 * Two extra attribue elements here, one for the lifespan entry and
1003 * one to NULL terminate the list for the sysfs core code
1004 */
1005 data = kzalloc(struct_size(data, attrs, size_add(stats->num_counters, 1)),
1006 GFP_KERNEL);
1007 if (!data)
1008 goto err_free_stats;
1009 group->attrs = kcalloc(stats->num_counters + 2,
1010 sizeof(*group->attrs), GFP_KERNEL);
1011 if (!group->attrs)
1012 goto err_free_data;
1013
1014 group->name = "hw_counters";
1015 data->stats = stats;
1016 return data;
1017
1018 err_free_data:
1019 kfree(data);
1020 err_free_stats:
1021 rdma_free_hw_stats_struct(stats);
1022 return ERR_PTR(-ENOMEM);
1023 }
1024
setup_hw_port_stats(struct ib_port * port,struct attribute_group * group)1025 static int setup_hw_port_stats(struct ib_port *port,
1026 struct attribute_group *group)
1027 {
1028 struct hw_stats_port_attribute *attr;
1029 struct hw_stats_port_data *data;
1030 bool opstat_skipped = false;
1031 int i, ret, pos = 0;
1032
1033 data = alloc_hw_stats_port(port, group);
1034 if (IS_ERR(data))
1035 return PTR_ERR(data);
1036
1037 ret = port->ibdev->ops.get_hw_stats(port->ibdev, data->stats,
1038 port->port_num,
1039 data->stats->num_counters);
1040 if (ret != data->stats->num_counters) {
1041 if (WARN_ON(ret >= 0))
1042 return -EINVAL;
1043 return ret;
1044 }
1045
1046 data->stats->timestamp = jiffies;
1047
1048 for (i = 0; i < data->stats->num_counters; i++) {
1049 if (data->stats->descs[i].flags & IB_STAT_FLAG_OPTIONAL) {
1050 opstat_skipped = true;
1051 continue;
1052 }
1053
1054 WARN_ON(opstat_skipped);
1055 attr = &data->attrs[pos];
1056 sysfs_attr_init(&attr->attr.attr);
1057 attr->attr.attr.name = data->stats->descs[i].name;
1058 attr->attr.attr.mode = 0444;
1059 attr->attr.show = hw_stat_port_show;
1060 attr->show = show_hw_stats;
1061 group->attrs[pos] = &attr->attr.attr;
1062 pos++;
1063 }
1064
1065 attr = &data->attrs[pos];
1066 sysfs_attr_init(&attr->attr.attr);
1067 attr->attr.attr.name = "lifespan";
1068 attr->attr.attr.mode = 0644;
1069 attr->attr.show = hw_stat_port_show;
1070 attr->show = show_stats_lifespan;
1071 attr->attr.store = hw_stat_port_store;
1072 attr->store = set_stats_lifespan;
1073 group->attrs[pos] = &attr->attr.attr;
1074
1075 port->hw_stats_data = data;
1076 return 0;
1077 }
1078
ib_get_hw_stats_port(struct ib_device * ibdev,u32 port_num)1079 struct rdma_hw_stats *ib_get_hw_stats_port(struct ib_device *ibdev,
1080 u32 port_num)
1081 {
1082 if (!ibdev->port_data || !rdma_is_port_valid(ibdev, port_num) ||
1083 !ibdev->port_data[port_num].sysfs->hw_stats_data)
1084 return NULL;
1085 return ibdev->port_data[port_num].sysfs->hw_stats_data->stats;
1086 }
1087
1088 static int
alloc_port_table_group(const char * name,struct attribute_group * group,struct port_table_attribute * attrs,size_t num,ssize_t (* show)(struct ib_device * ibdev,u32 port_num,struct ib_port_attribute *,char * buf))1089 alloc_port_table_group(const char *name, struct attribute_group *group,
1090 struct port_table_attribute *attrs, size_t num,
1091 ssize_t (*show)(struct ib_device *ibdev, u32 port_num,
1092 struct ib_port_attribute *, char *buf))
1093 {
1094 struct attribute **attr_list;
1095 int i;
1096
1097 attr_list = kcalloc(num + 1, sizeof(*attr_list), GFP_KERNEL);
1098 if (!attr_list)
1099 return -ENOMEM;
1100
1101 for (i = 0; i < num; i++) {
1102 struct port_table_attribute *element = &attrs[i];
1103
1104 if (snprintf(element->name, sizeof(element->name), "%d", i) >=
1105 sizeof(element->name))
1106 goto err;
1107
1108 sysfs_attr_init(&element->attr.attr);
1109 element->attr.attr.name = element->name;
1110 element->attr.attr.mode = 0444;
1111 element->attr.show = show;
1112 element->index = i;
1113
1114 attr_list[i] = &element->attr.attr;
1115 }
1116 group->name = name;
1117 group->attrs = attr_list;
1118 return 0;
1119 err:
1120 kfree(attr_list);
1121 return -EINVAL;
1122 }
1123
1124 /*
1125 * Create the sysfs:
1126 * ibp0s9/ports/XX/gid_attrs/{ndevs,types}/YYY
1127 * YYY is the gid table index in decimal
1128 */
setup_gid_attrs(struct ib_port * port,const struct ib_port_attr * attr)1129 static int setup_gid_attrs(struct ib_port *port,
1130 const struct ib_port_attr *attr)
1131 {
1132 struct gid_attr_group *gid_attr_group;
1133 int ret;
1134
1135 gid_attr_group = kzalloc(struct_size(gid_attr_group, attrs_list,
1136 size_mul(attr->gid_tbl_len, 2)),
1137 GFP_KERNEL);
1138 if (!gid_attr_group)
1139 return -ENOMEM;
1140 gid_attr_group->port = port;
1141 kobject_init(&gid_attr_group->kobj, &gid_attr_type);
1142
1143 ret = alloc_port_table_group("ndevs", &gid_attr_group->groups[0],
1144 gid_attr_group->attrs_list,
1145 attr->gid_tbl_len,
1146 show_port_gid_attr_ndev);
1147 if (ret)
1148 goto err_put;
1149 gid_attr_group->groups_list[0] = &gid_attr_group->groups[0];
1150
1151 ret = alloc_port_table_group(
1152 "types", &gid_attr_group->groups[1],
1153 gid_attr_group->attrs_list + attr->gid_tbl_len,
1154 attr->gid_tbl_len, show_port_gid_attr_gid_type);
1155 if (ret)
1156 goto err_put;
1157 gid_attr_group->groups_list[1] = &gid_attr_group->groups[1];
1158
1159 ret = kobject_add(&gid_attr_group->kobj, &port->kobj, "gid_attrs");
1160 if (ret)
1161 goto err_put;
1162 ret = sysfs_create_groups(&gid_attr_group->kobj,
1163 gid_attr_group->groups_list);
1164 if (ret)
1165 goto err_del;
1166 port->gid_attr_group = gid_attr_group;
1167 return 0;
1168
1169 err_del:
1170 kobject_del(&gid_attr_group->kobj);
1171 err_put:
1172 kobject_put(&gid_attr_group->kobj);
1173 return ret;
1174 }
1175
destroy_gid_attrs(struct ib_port * port)1176 static void destroy_gid_attrs(struct ib_port *port)
1177 {
1178 struct gid_attr_group *gid_attr_group = port->gid_attr_group;
1179
1180 if (!gid_attr_group)
1181 return;
1182 sysfs_remove_groups(&gid_attr_group->kobj, gid_attr_group->groups_list);
1183 kobject_del(&gid_attr_group->kobj);
1184 kobject_put(&gid_attr_group->kobj);
1185 }
1186
1187 /*
1188 * Create the sysfs:
1189 * ibp0s9/ports/XX/{gids,pkeys,counters}/YYY
1190 */
setup_port(struct ib_core_device * coredev,int port_num,const struct ib_port_attr * attr)1191 static struct ib_port *setup_port(struct ib_core_device *coredev, int port_num,
1192 const struct ib_port_attr *attr)
1193 {
1194 struct ib_device *device = rdma_device_to_ibdev(&coredev->dev);
1195 bool is_full_dev = &device->coredev == coredev;
1196 const struct attribute_group **cur_group;
1197 struct ib_port *p;
1198 int ret;
1199
1200 p = kvzalloc(struct_size(p, attrs_list,
1201 size_add(attr->gid_tbl_len, attr->pkey_tbl_len)),
1202 GFP_KERNEL);
1203 if (!p)
1204 return ERR_PTR(-ENOMEM);
1205 p->ibdev = device;
1206 p->port_num = port_num;
1207 kobject_init(&p->kobj, &port_type);
1208
1209 if (device->port_data && is_full_dev)
1210 device->port_data[port_num].sysfs = p;
1211
1212 cur_group = p->groups_list;
1213 ret = alloc_port_table_group("gids", &p->groups[0], p->attrs_list,
1214 attr->gid_tbl_len, show_port_gid);
1215 if (ret)
1216 goto err_put;
1217 *cur_group++ = &p->groups[0];
1218
1219 if (attr->pkey_tbl_len) {
1220 ret = alloc_port_table_group("pkeys", &p->groups[1],
1221 p->attrs_list + attr->gid_tbl_len,
1222 attr->pkey_tbl_len, show_port_pkey);
1223 if (ret)
1224 goto err_put;
1225 *cur_group++ = &p->groups[1];
1226 }
1227
1228 /*
1229 * If port == 0, it means hw_counters are per device and not per
1230 * port, so holder should be device. Therefore skip per port
1231 * counter initialization.
1232 */
1233 if (port_num && is_full_dev) {
1234 ret = setup_hw_port_stats(p, &p->groups[2]);
1235 if (ret && ret != -EOPNOTSUPP)
1236 goto err_put;
1237 if (!ret)
1238 *cur_group++ = &p->groups[2];
1239 }
1240
1241 if (device->ops.process_mad && is_full_dev)
1242 *cur_group++ = get_counter_table(device, port_num);
1243
1244 ret = kobject_add(&p->kobj, coredev->ports_kobj, "%d", port_num);
1245 if (ret)
1246 goto err_put;
1247 ret = sysfs_create_groups(&p->kobj, p->groups_list);
1248 if (ret)
1249 goto err_del;
1250 if (is_full_dev) {
1251 ret = sysfs_create_groups(&p->kobj, device->ops.port_groups);
1252 if (ret)
1253 goto err_groups;
1254 }
1255
1256 list_add_tail(&p->kobj.entry, &coredev->port_list);
1257 return p;
1258
1259 err_groups:
1260 sysfs_remove_groups(&p->kobj, p->groups_list);
1261 err_del:
1262 kobject_del(&p->kobj);
1263 err_put:
1264 if (device->port_data && is_full_dev)
1265 device->port_data[port_num].sysfs = NULL;
1266 kobject_put(&p->kobj);
1267 return ERR_PTR(ret);
1268 }
1269
destroy_port(struct ib_core_device * coredev,struct ib_port * port)1270 static void destroy_port(struct ib_core_device *coredev, struct ib_port *port)
1271 {
1272 bool is_full_dev = &port->ibdev->coredev == coredev;
1273
1274 list_del(&port->kobj.entry);
1275 if (is_full_dev)
1276 sysfs_remove_groups(&port->kobj, port->ibdev->ops.port_groups);
1277
1278 sysfs_remove_groups(&port->kobj, port->groups_list);
1279 kobject_del(&port->kobj);
1280
1281 if (port->ibdev->port_data &&
1282 port->ibdev->port_data[port->port_num].sysfs == port)
1283 port->ibdev->port_data[port->port_num].sysfs = NULL;
1284
1285 kobject_put(&port->kobj);
1286 }
1287
node_type_string(int node_type)1288 static const char *node_type_string(int node_type)
1289 {
1290 switch (node_type) {
1291 case RDMA_NODE_IB_CA:
1292 return "CA";
1293 case RDMA_NODE_IB_SWITCH:
1294 return "switch";
1295 case RDMA_NODE_IB_ROUTER:
1296 return "router";
1297 case RDMA_NODE_RNIC:
1298 return "RNIC";
1299 case RDMA_NODE_USNIC:
1300 return "usNIC";
1301 case RDMA_NODE_USNIC_UDP:
1302 return "usNIC UDP";
1303 case RDMA_NODE_UNSPECIFIED:
1304 return "unspecified";
1305 }
1306 return "<unknown>";
1307 }
1308
node_type_show(struct device * device,struct device_attribute * attr,char * buf)1309 static ssize_t node_type_show(struct device *device,
1310 struct device_attribute *attr, char *buf)
1311 {
1312 struct ib_device *dev = rdma_device_to_ibdev(device);
1313
1314 return sysfs_emit(buf, "%u: %s\n", dev->node_type,
1315 node_type_string(dev->node_type));
1316 }
1317 static DEVICE_ATTR_RO(node_type);
1318
sys_image_guid_show(struct device * device,struct device_attribute * dev_attr,char * buf)1319 static ssize_t sys_image_guid_show(struct device *device,
1320 struct device_attribute *dev_attr, char *buf)
1321 {
1322 struct ib_device *dev = rdma_device_to_ibdev(device);
1323 __be16 *guid = (__be16 *)&dev->attrs.sys_image_guid;
1324
1325 return sysfs_emit(buf, "%04x:%04x:%04x:%04x\n",
1326 be16_to_cpu(guid[0]),
1327 be16_to_cpu(guid[1]),
1328 be16_to_cpu(guid[2]),
1329 be16_to_cpu(guid[3]));
1330 }
1331 static DEVICE_ATTR_RO(sys_image_guid);
1332
node_guid_show(struct device * device,struct device_attribute * attr,char * buf)1333 static ssize_t node_guid_show(struct device *device,
1334 struct device_attribute *attr, char *buf)
1335 {
1336 struct ib_device *dev = rdma_device_to_ibdev(device);
1337 __be16 *node_guid = (__be16 *)&dev->node_guid;
1338
1339 return sysfs_emit(buf, "%04x:%04x:%04x:%04x\n",
1340 be16_to_cpu(node_guid[0]),
1341 be16_to_cpu(node_guid[1]),
1342 be16_to_cpu(node_guid[2]),
1343 be16_to_cpu(node_guid[3]));
1344 }
1345 static DEVICE_ATTR_RO(node_guid);
1346
node_desc_show(struct device * device,struct device_attribute * attr,char * buf)1347 static ssize_t node_desc_show(struct device *device,
1348 struct device_attribute *attr, char *buf)
1349 {
1350 struct ib_device *dev = rdma_device_to_ibdev(device);
1351
1352 return sysfs_emit(buf, "%.64s\n", dev->node_desc);
1353 }
1354
node_desc_store(struct device * device,struct device_attribute * attr,const char * buf,size_t count)1355 static ssize_t node_desc_store(struct device *device,
1356 struct device_attribute *attr,
1357 const char *buf, size_t count)
1358 {
1359 struct ib_device *dev = rdma_device_to_ibdev(device);
1360 struct ib_device_modify desc = {};
1361 int ret;
1362
1363 if (!dev->ops.modify_device)
1364 return -EOPNOTSUPP;
1365
1366 memcpy(desc.node_desc, buf, min_t(int, count, IB_DEVICE_NODE_DESC_MAX));
1367 ret = ib_modify_device(dev, IB_DEVICE_MODIFY_NODE_DESC, &desc);
1368 if (ret)
1369 return ret;
1370
1371 return count;
1372 }
1373 static DEVICE_ATTR_RW(node_desc);
1374
fw_ver_show(struct device * device,struct device_attribute * attr,char * buf)1375 static ssize_t fw_ver_show(struct device *device, struct device_attribute *attr,
1376 char *buf)
1377 {
1378 struct ib_device *dev = rdma_device_to_ibdev(device);
1379 char version[IB_FW_VERSION_NAME_MAX] = {};
1380
1381 ib_get_device_fw_str(dev, version);
1382
1383 return sysfs_emit(buf, "%s\n", version);
1384 }
1385 static DEVICE_ATTR_RO(fw_ver);
1386
1387 static struct attribute *ib_dev_attrs[] = {
1388 &dev_attr_node_type.attr,
1389 &dev_attr_node_guid.attr,
1390 &dev_attr_sys_image_guid.attr,
1391 &dev_attr_fw_ver.attr,
1392 &dev_attr_node_desc.attr,
1393 NULL,
1394 };
1395
1396 const struct attribute_group ib_dev_attr_group = {
1397 .attrs = ib_dev_attrs,
1398 };
1399
ib_free_port_attrs(struct ib_core_device * coredev)1400 void ib_free_port_attrs(struct ib_core_device *coredev)
1401 {
1402 struct kobject *p, *t;
1403
1404 list_for_each_entry_safe(p, t, &coredev->port_list, entry) {
1405 struct ib_port *port = container_of(p, struct ib_port, kobj);
1406
1407 destroy_gid_attrs(port);
1408 destroy_port(coredev, port);
1409 }
1410
1411 kobject_put(coredev->ports_kobj);
1412 }
1413
ib_setup_port_attrs(struct ib_core_device * coredev)1414 int ib_setup_port_attrs(struct ib_core_device *coredev)
1415 {
1416 struct ib_device *device = rdma_device_to_ibdev(&coredev->dev);
1417 u32 port_num;
1418 int ret;
1419
1420 coredev->ports_kobj = kobject_create_and_add("ports",
1421 &coredev->dev.kobj);
1422 if (!coredev->ports_kobj)
1423 return -ENOMEM;
1424
1425 rdma_for_each_port (device, port_num) {
1426 struct ib_port_attr attr;
1427 struct ib_port *port;
1428
1429 ret = ib_query_port(device, port_num, &attr);
1430 if (ret)
1431 goto err_put;
1432
1433 port = setup_port(coredev, port_num, &attr);
1434 if (IS_ERR(port)) {
1435 ret = PTR_ERR(port);
1436 goto err_put;
1437 }
1438
1439 ret = setup_gid_attrs(port, &attr);
1440 if (ret)
1441 goto err_put;
1442 }
1443 return 0;
1444
1445 err_put:
1446 ib_free_port_attrs(coredev);
1447 return ret;
1448 }
1449
1450 /**
1451 * ib_port_register_client_groups - Add an ib_client's attributes to the port
1452 *
1453 * @ibdev: IB device to add counters
1454 * @port_num: valid port number
1455 * @groups: Group list of attributes
1456 *
1457 * Do not use. Only for legacy sysfs compatibility.
1458 */
ib_port_register_client_groups(struct ib_device * ibdev,u32 port_num,const struct attribute_group ** groups)1459 int ib_port_register_client_groups(struct ib_device *ibdev, u32 port_num,
1460 const struct attribute_group **groups)
1461 {
1462 return sysfs_create_groups(&ibdev->port_data[port_num].sysfs->kobj,
1463 groups);
1464 }
1465 EXPORT_SYMBOL(ib_port_register_client_groups);
1466
ib_port_unregister_client_groups(struct ib_device * ibdev,u32 port_num,const struct attribute_group ** groups)1467 void ib_port_unregister_client_groups(struct ib_device *ibdev, u32 port_num,
1468 const struct attribute_group **groups)
1469 {
1470 return sysfs_remove_groups(&ibdev->port_data[port_num].sysfs->kobj,
1471 groups);
1472 }
1473 EXPORT_SYMBOL(ib_port_unregister_client_groups);
1474