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Merge tag 'mfd-for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
[mirror_ubuntu-zesty-kernel.git] / drivers / infiniband / core / sysfs.c
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
42 #include <rdma/ib_mad.h>
43 #include <rdma/ib_pma.h>
44
45 struct ib_port;
46
47 struct gid_attr_group {
48 struct ib_port *port;
49 struct kobject kobj;
50 struct attribute_group ndev;
51 struct attribute_group type;
52 };
53 struct ib_port {
54 struct kobject kobj;
55 struct ib_device *ibdev;
56 struct gid_attr_group *gid_attr_group;
57 struct attribute_group gid_group;
58 struct attribute_group pkey_group;
59 struct attribute_group *pma_table;
60 struct attribute_group *hw_stats_ag;
61 struct rdma_hw_stats *hw_stats;
62 u8 port_num;
63 };
64
65 struct port_attribute {
66 struct attribute attr;
67 ssize_t (*show)(struct ib_port *, struct port_attribute *, char *buf);
68 ssize_t (*store)(struct ib_port *, struct port_attribute *,
69 const char *buf, size_t count);
70 };
71
72 #define PORT_ATTR(_name, _mode, _show, _store) \
73 struct port_attribute port_attr_##_name = __ATTR(_name, _mode, _show, _store)
74
75 #define PORT_ATTR_RO(_name) \
76 struct port_attribute port_attr_##_name = __ATTR_RO(_name)
77
78 struct port_table_attribute {
79 struct port_attribute attr;
80 char name[8];
81 int index;
82 __be16 attr_id;
83 };
84
85 struct hw_stats_attribute {
86 struct attribute attr;
87 ssize_t (*show)(struct kobject *kobj,
88 struct attribute *attr, char *buf);
89 ssize_t (*store)(struct kobject *kobj,
90 struct attribute *attr,
91 const char *buf,
92 size_t count);
93 int index;
94 u8 port_num;
95 };
96
97 static ssize_t port_attr_show(struct kobject *kobj,
98 struct attribute *attr, char *buf)
99 {
100 struct port_attribute *port_attr =
101 container_of(attr, struct port_attribute, attr);
102 struct ib_port *p = container_of(kobj, struct ib_port, kobj);
103
104 if (!port_attr->show)
105 return -EIO;
106
107 return port_attr->show(p, port_attr, buf);
108 }
109
110 static const struct sysfs_ops port_sysfs_ops = {
111 .show = port_attr_show
112 };
113
114 static ssize_t gid_attr_show(struct kobject *kobj,
115 struct attribute *attr, char *buf)
116 {
117 struct port_attribute *port_attr =
118 container_of(attr, struct port_attribute, attr);
119 struct ib_port *p = container_of(kobj, struct gid_attr_group,
120 kobj)->port;
121
122 if (!port_attr->show)
123 return -EIO;
124
125 return port_attr->show(p, port_attr, buf);
126 }
127
128 static const struct sysfs_ops gid_attr_sysfs_ops = {
129 .show = gid_attr_show
130 };
131
132 static ssize_t state_show(struct ib_port *p, struct port_attribute *unused,
133 char *buf)
134 {
135 struct ib_port_attr attr;
136 ssize_t ret;
137
138 static const char *state_name[] = {
139 [IB_PORT_NOP] = "NOP",
140 [IB_PORT_DOWN] = "DOWN",
141 [IB_PORT_INIT] = "INIT",
142 [IB_PORT_ARMED] = "ARMED",
143 [IB_PORT_ACTIVE] = "ACTIVE",
144 [IB_PORT_ACTIVE_DEFER] = "ACTIVE_DEFER"
145 };
146
147 ret = ib_query_port(p->ibdev, p->port_num, &attr);
148 if (ret)
149 return ret;
150
151 return sprintf(buf, "%d: %s\n", attr.state,
152 attr.state >= 0 && attr.state < ARRAY_SIZE(state_name) ?
153 state_name[attr.state] : "UNKNOWN");
154 }
155
156 static ssize_t lid_show(struct ib_port *p, struct port_attribute *unused,
157 char *buf)
158 {
159 struct ib_port_attr attr;
160 ssize_t ret;
161
162 ret = ib_query_port(p->ibdev, p->port_num, &attr);
163 if (ret)
164 return ret;
165
166 return sprintf(buf, "0x%x\n", attr.lid);
167 }
168
169 static ssize_t lid_mask_count_show(struct ib_port *p,
170 struct port_attribute *unused,
171 char *buf)
172 {
173 struct ib_port_attr attr;
174 ssize_t ret;
175
176 ret = ib_query_port(p->ibdev, p->port_num, &attr);
177 if (ret)
178 return ret;
179
180 return sprintf(buf, "%d\n", attr.lmc);
181 }
182
183 static ssize_t sm_lid_show(struct ib_port *p, struct port_attribute *unused,
184 char *buf)
185 {
186 struct ib_port_attr attr;
187 ssize_t ret;
188
189 ret = ib_query_port(p->ibdev, p->port_num, &attr);
190 if (ret)
191 return ret;
192
193 return sprintf(buf, "0x%x\n", attr.sm_lid);
194 }
195
196 static ssize_t sm_sl_show(struct ib_port *p, struct port_attribute *unused,
197 char *buf)
198 {
199 struct ib_port_attr attr;
200 ssize_t ret;
201
202 ret = ib_query_port(p->ibdev, p->port_num, &attr);
203 if (ret)
204 return ret;
205
206 return sprintf(buf, "%d\n", attr.sm_sl);
207 }
208
209 static ssize_t cap_mask_show(struct ib_port *p, struct port_attribute *unused,
210 char *buf)
211 {
212 struct ib_port_attr attr;
213 ssize_t ret;
214
215 ret = ib_query_port(p->ibdev, p->port_num, &attr);
216 if (ret)
217 return ret;
218
219 return sprintf(buf, "0x%08x\n", attr.port_cap_flags);
220 }
221
222 static ssize_t rate_show(struct ib_port *p, struct port_attribute *unused,
223 char *buf)
224 {
225 struct ib_port_attr attr;
226 char *speed = "";
227 int rate; /* in deci-Gb/sec */
228 ssize_t ret;
229
230 ret = ib_query_port(p->ibdev, p->port_num, &attr);
231 if (ret)
232 return ret;
233
234 switch (attr.active_speed) {
235 case IB_SPEED_DDR:
236 speed = " DDR";
237 rate = 50;
238 break;
239 case IB_SPEED_QDR:
240 speed = " QDR";
241 rate = 100;
242 break;
243 case IB_SPEED_FDR10:
244 speed = " FDR10";
245 rate = 100;
246 break;
247 case IB_SPEED_FDR:
248 speed = " FDR";
249 rate = 140;
250 break;
251 case IB_SPEED_EDR:
252 speed = " EDR";
253 rate = 250;
254 break;
255 case IB_SPEED_SDR:
256 default: /* default to SDR for invalid rates */
257 rate = 25;
258 break;
259 }
260
261 rate *= ib_width_enum_to_int(attr.active_width);
262 if (rate < 0)
263 return -EINVAL;
264
265 return sprintf(buf, "%d%s Gb/sec (%dX%s)\n",
266 rate / 10, rate % 10 ? ".5" : "",
267 ib_width_enum_to_int(attr.active_width), speed);
268 }
269
270 static ssize_t phys_state_show(struct ib_port *p, struct port_attribute *unused,
271 char *buf)
272 {
273 struct ib_port_attr attr;
274
275 ssize_t ret;
276
277 ret = ib_query_port(p->ibdev, p->port_num, &attr);
278 if (ret)
279 return ret;
280
281 switch (attr.phys_state) {
282 case 1: return sprintf(buf, "1: Sleep\n");
283 case 2: return sprintf(buf, "2: Polling\n");
284 case 3: return sprintf(buf, "3: Disabled\n");
285 case 4: return sprintf(buf, "4: PortConfigurationTraining\n");
286 case 5: return sprintf(buf, "5: LinkUp\n");
287 case 6: return sprintf(buf, "6: LinkErrorRecovery\n");
288 case 7: return sprintf(buf, "7: Phy Test\n");
289 default: return sprintf(buf, "%d: <unknown>\n", attr.phys_state);
290 }
291 }
292
293 static ssize_t link_layer_show(struct ib_port *p, struct port_attribute *unused,
294 char *buf)
295 {
296 switch (rdma_port_get_link_layer(p->ibdev, p->port_num)) {
297 case IB_LINK_LAYER_INFINIBAND:
298 return sprintf(buf, "%s\n", "InfiniBand");
299 case IB_LINK_LAYER_ETHERNET:
300 return sprintf(buf, "%s\n", "Ethernet");
301 default:
302 return sprintf(buf, "%s\n", "Unknown");
303 }
304 }
305
306 static PORT_ATTR_RO(state);
307 static PORT_ATTR_RO(lid);
308 static PORT_ATTR_RO(lid_mask_count);
309 static PORT_ATTR_RO(sm_lid);
310 static PORT_ATTR_RO(sm_sl);
311 static PORT_ATTR_RO(cap_mask);
312 static PORT_ATTR_RO(rate);
313 static PORT_ATTR_RO(phys_state);
314 static PORT_ATTR_RO(link_layer);
315
316 static struct attribute *port_default_attrs[] = {
317 &port_attr_state.attr,
318 &port_attr_lid.attr,
319 &port_attr_lid_mask_count.attr,
320 &port_attr_sm_lid.attr,
321 &port_attr_sm_sl.attr,
322 &port_attr_cap_mask.attr,
323 &port_attr_rate.attr,
324 &port_attr_phys_state.attr,
325 &port_attr_link_layer.attr,
326 NULL
327 };
328
329 static size_t print_ndev(struct ib_gid_attr *gid_attr, char *buf)
330 {
331 if (!gid_attr->ndev)
332 return -EINVAL;
333
334 return sprintf(buf, "%s\n", gid_attr->ndev->name);
335 }
336
337 static size_t print_gid_type(struct ib_gid_attr *gid_attr, char *buf)
338 {
339 return sprintf(buf, "%s\n", ib_cache_gid_type_str(gid_attr->gid_type));
340 }
341
342 static ssize_t _show_port_gid_attr(struct ib_port *p,
343 struct port_attribute *attr,
344 char *buf,
345 size_t (*print)(struct ib_gid_attr *gid_attr,
346 char *buf))
347 {
348 struct port_table_attribute *tab_attr =
349 container_of(attr, struct port_table_attribute, attr);
350 union ib_gid gid;
351 struct ib_gid_attr gid_attr = {};
352 ssize_t ret;
353
354 ret = ib_query_gid(p->ibdev, p->port_num, tab_attr->index, &gid,
355 &gid_attr);
356 if (ret)
357 goto err;
358
359 ret = print(&gid_attr, buf);
360
361 err:
362 if (gid_attr.ndev)
363 dev_put(gid_attr.ndev);
364 return ret;
365 }
366
367 static ssize_t show_port_gid(struct ib_port *p, struct port_attribute *attr,
368 char *buf)
369 {
370 struct port_table_attribute *tab_attr =
371 container_of(attr, struct port_table_attribute, attr);
372 union ib_gid gid;
373 ssize_t ret;
374
375 ret = ib_query_gid(p->ibdev, p->port_num, tab_attr->index, &gid, NULL);
376 if (ret)
377 return ret;
378
379 return sprintf(buf, "%pI6\n", gid.raw);
380 }
381
382 static ssize_t show_port_gid_attr_ndev(struct ib_port *p,
383 struct port_attribute *attr, char *buf)
384 {
385 return _show_port_gid_attr(p, attr, buf, print_ndev);
386 }
387
388 static ssize_t show_port_gid_attr_gid_type(struct ib_port *p,
389 struct port_attribute *attr,
390 char *buf)
391 {
392 return _show_port_gid_attr(p, attr, buf, print_gid_type);
393 }
394
395 static ssize_t show_port_pkey(struct ib_port *p, struct port_attribute *attr,
396 char *buf)
397 {
398 struct port_table_attribute *tab_attr =
399 container_of(attr, struct port_table_attribute, attr);
400 u16 pkey;
401 ssize_t ret;
402
403 ret = ib_query_pkey(p->ibdev, p->port_num, tab_attr->index, &pkey);
404 if (ret)
405 return ret;
406
407 return sprintf(buf, "0x%04x\n", pkey);
408 }
409
410 #define PORT_PMA_ATTR(_name, _counter, _width, _offset) \
411 struct port_table_attribute port_pma_attr_##_name = { \
412 .attr = __ATTR(_name, S_IRUGO, show_pma_counter, NULL), \
413 .index = (_offset) | ((_width) << 16) | ((_counter) << 24), \
414 .attr_id = IB_PMA_PORT_COUNTERS , \
415 }
416
417 #define PORT_PMA_ATTR_EXT(_name, _width, _offset) \
418 struct port_table_attribute port_pma_attr_ext_##_name = { \
419 .attr = __ATTR(_name, S_IRUGO, show_pma_counter, NULL), \
420 .index = (_offset) | ((_width) << 16), \
421 .attr_id = IB_PMA_PORT_COUNTERS_EXT , \
422 }
423
424 /*
425 * Get a Perfmgmt MAD block of data.
426 * Returns error code or the number of bytes retrieved.
427 */
428 static int get_perf_mad(struct ib_device *dev, int port_num, __be16 attr,
429 void *data, int offset, size_t size)
430 {
431 struct ib_mad *in_mad;
432 struct ib_mad *out_mad;
433 size_t mad_size = sizeof(*out_mad);
434 u16 out_mad_pkey_index = 0;
435 ssize_t ret;
436
437 if (!dev->process_mad)
438 return -ENOSYS;
439
440 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
441 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
442 if (!in_mad || !out_mad) {
443 ret = -ENOMEM;
444 goto out;
445 }
446
447 in_mad->mad_hdr.base_version = 1;
448 in_mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_PERF_MGMT;
449 in_mad->mad_hdr.class_version = 1;
450 in_mad->mad_hdr.method = IB_MGMT_METHOD_GET;
451 in_mad->mad_hdr.attr_id = attr;
452
453 if (attr != IB_PMA_CLASS_PORT_INFO)
454 in_mad->data[41] = port_num; /* PortSelect field */
455
456 if ((dev->process_mad(dev, IB_MAD_IGNORE_MKEY,
457 port_num, NULL, NULL,
458 (const struct ib_mad_hdr *)in_mad, mad_size,
459 (struct ib_mad_hdr *)out_mad, &mad_size,
460 &out_mad_pkey_index) &
461 (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) !=
462 (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) {
463 ret = -EINVAL;
464 goto out;
465 }
466 memcpy(data, out_mad->data + offset, size);
467 ret = size;
468 out:
469 kfree(in_mad);
470 kfree(out_mad);
471 return ret;
472 }
473
474 static ssize_t show_pma_counter(struct ib_port *p, struct port_attribute *attr,
475 char *buf)
476 {
477 struct port_table_attribute *tab_attr =
478 container_of(attr, struct port_table_attribute, attr);
479 int offset = tab_attr->index & 0xffff;
480 int width = (tab_attr->index >> 16) & 0xff;
481 ssize_t ret;
482 u8 data[8];
483
484 ret = get_perf_mad(p->ibdev, p->port_num, tab_attr->attr_id, &data,
485 40 + offset / 8, sizeof(data));
486 if (ret < 0)
487 return sprintf(buf, "N/A (no PMA)\n");
488
489 switch (width) {
490 case 4:
491 ret = sprintf(buf, "%u\n", (*data >>
492 (4 - (offset % 8))) & 0xf);
493 break;
494 case 8:
495 ret = sprintf(buf, "%u\n", *data);
496 break;
497 case 16:
498 ret = sprintf(buf, "%u\n",
499 be16_to_cpup((__be16 *)data));
500 break;
501 case 32:
502 ret = sprintf(buf, "%u\n",
503 be32_to_cpup((__be32 *)data));
504 break;
505 case 64:
506 ret = sprintf(buf, "%llu\n",
507 be64_to_cpup((__be64 *)data));
508 break;
509
510 default:
511 ret = 0;
512 }
513
514 return ret;
515 }
516
517 static PORT_PMA_ATTR(symbol_error , 0, 16, 32);
518 static PORT_PMA_ATTR(link_error_recovery , 1, 8, 48);
519 static PORT_PMA_ATTR(link_downed , 2, 8, 56);
520 static PORT_PMA_ATTR(port_rcv_errors , 3, 16, 64);
521 static PORT_PMA_ATTR(port_rcv_remote_physical_errors, 4, 16, 80);
522 static PORT_PMA_ATTR(port_rcv_switch_relay_errors , 5, 16, 96);
523 static PORT_PMA_ATTR(port_xmit_discards , 6, 16, 112);
524 static PORT_PMA_ATTR(port_xmit_constraint_errors , 7, 8, 128);
525 static PORT_PMA_ATTR(port_rcv_constraint_errors , 8, 8, 136);
526 static PORT_PMA_ATTR(local_link_integrity_errors , 9, 4, 152);
527 static PORT_PMA_ATTR(excessive_buffer_overrun_errors, 10, 4, 156);
528 static PORT_PMA_ATTR(VL15_dropped , 11, 16, 176);
529 static PORT_PMA_ATTR(port_xmit_data , 12, 32, 192);
530 static PORT_PMA_ATTR(port_rcv_data , 13, 32, 224);
531 static PORT_PMA_ATTR(port_xmit_packets , 14, 32, 256);
532 static PORT_PMA_ATTR(port_rcv_packets , 15, 32, 288);
533 static PORT_PMA_ATTR(port_xmit_wait , 0, 32, 320);
534
535 /*
536 * Counters added by extended set
537 */
538 static PORT_PMA_ATTR_EXT(port_xmit_data , 64, 64);
539 static PORT_PMA_ATTR_EXT(port_rcv_data , 64, 128);
540 static PORT_PMA_ATTR_EXT(port_xmit_packets , 64, 192);
541 static PORT_PMA_ATTR_EXT(port_rcv_packets , 64, 256);
542 static PORT_PMA_ATTR_EXT(unicast_xmit_packets , 64, 320);
543 static PORT_PMA_ATTR_EXT(unicast_rcv_packets , 64, 384);
544 static PORT_PMA_ATTR_EXT(multicast_xmit_packets , 64, 448);
545 static PORT_PMA_ATTR_EXT(multicast_rcv_packets , 64, 512);
546
547 static struct attribute *pma_attrs[] = {
548 &port_pma_attr_symbol_error.attr.attr,
549 &port_pma_attr_link_error_recovery.attr.attr,
550 &port_pma_attr_link_downed.attr.attr,
551 &port_pma_attr_port_rcv_errors.attr.attr,
552 &port_pma_attr_port_rcv_remote_physical_errors.attr.attr,
553 &port_pma_attr_port_rcv_switch_relay_errors.attr.attr,
554 &port_pma_attr_port_xmit_discards.attr.attr,
555 &port_pma_attr_port_xmit_constraint_errors.attr.attr,
556 &port_pma_attr_port_rcv_constraint_errors.attr.attr,
557 &port_pma_attr_local_link_integrity_errors.attr.attr,
558 &port_pma_attr_excessive_buffer_overrun_errors.attr.attr,
559 &port_pma_attr_VL15_dropped.attr.attr,
560 &port_pma_attr_port_xmit_data.attr.attr,
561 &port_pma_attr_port_rcv_data.attr.attr,
562 &port_pma_attr_port_xmit_packets.attr.attr,
563 &port_pma_attr_port_rcv_packets.attr.attr,
564 &port_pma_attr_port_xmit_wait.attr.attr,
565 NULL
566 };
567
568 static struct attribute *pma_attrs_ext[] = {
569 &port_pma_attr_symbol_error.attr.attr,
570 &port_pma_attr_link_error_recovery.attr.attr,
571 &port_pma_attr_link_downed.attr.attr,
572 &port_pma_attr_port_rcv_errors.attr.attr,
573 &port_pma_attr_port_rcv_remote_physical_errors.attr.attr,
574 &port_pma_attr_port_rcv_switch_relay_errors.attr.attr,
575 &port_pma_attr_port_xmit_discards.attr.attr,
576 &port_pma_attr_port_xmit_constraint_errors.attr.attr,
577 &port_pma_attr_port_rcv_constraint_errors.attr.attr,
578 &port_pma_attr_local_link_integrity_errors.attr.attr,
579 &port_pma_attr_excessive_buffer_overrun_errors.attr.attr,
580 &port_pma_attr_VL15_dropped.attr.attr,
581 &port_pma_attr_ext_port_xmit_data.attr.attr,
582 &port_pma_attr_ext_port_rcv_data.attr.attr,
583 &port_pma_attr_ext_port_xmit_packets.attr.attr,
584 &port_pma_attr_port_xmit_wait.attr.attr,
585 &port_pma_attr_ext_port_rcv_packets.attr.attr,
586 &port_pma_attr_ext_unicast_rcv_packets.attr.attr,
587 &port_pma_attr_ext_unicast_xmit_packets.attr.attr,
588 &port_pma_attr_ext_multicast_rcv_packets.attr.attr,
589 &port_pma_attr_ext_multicast_xmit_packets.attr.attr,
590 NULL
591 };
592
593 static struct attribute *pma_attrs_noietf[] = {
594 &port_pma_attr_symbol_error.attr.attr,
595 &port_pma_attr_link_error_recovery.attr.attr,
596 &port_pma_attr_link_downed.attr.attr,
597 &port_pma_attr_port_rcv_errors.attr.attr,
598 &port_pma_attr_port_rcv_remote_physical_errors.attr.attr,
599 &port_pma_attr_port_rcv_switch_relay_errors.attr.attr,
600 &port_pma_attr_port_xmit_discards.attr.attr,
601 &port_pma_attr_port_xmit_constraint_errors.attr.attr,
602 &port_pma_attr_port_rcv_constraint_errors.attr.attr,
603 &port_pma_attr_local_link_integrity_errors.attr.attr,
604 &port_pma_attr_excessive_buffer_overrun_errors.attr.attr,
605 &port_pma_attr_VL15_dropped.attr.attr,
606 &port_pma_attr_ext_port_xmit_data.attr.attr,
607 &port_pma_attr_ext_port_rcv_data.attr.attr,
608 &port_pma_attr_ext_port_xmit_packets.attr.attr,
609 &port_pma_attr_ext_port_rcv_packets.attr.attr,
610 &port_pma_attr_port_xmit_wait.attr.attr,
611 NULL
612 };
613
614 static struct attribute_group pma_group = {
615 .name = "counters",
616 .attrs = pma_attrs
617 };
618
619 static struct attribute_group pma_group_ext = {
620 .name = "counters",
621 .attrs = pma_attrs_ext
622 };
623
624 static struct attribute_group pma_group_noietf = {
625 .name = "counters",
626 .attrs = pma_attrs_noietf
627 };
628
629 static void ib_port_release(struct kobject *kobj)
630 {
631 struct ib_port *p = container_of(kobj, struct ib_port, kobj);
632 struct attribute *a;
633 int i;
634
635 if (p->gid_group.attrs) {
636 for (i = 0; (a = p->gid_group.attrs[i]); ++i)
637 kfree(a);
638
639 kfree(p->gid_group.attrs);
640 }
641
642 if (p->pkey_group.attrs) {
643 for (i = 0; (a = p->pkey_group.attrs[i]); ++i)
644 kfree(a);
645
646 kfree(p->pkey_group.attrs);
647 }
648
649 kfree(p);
650 }
651
652 static void ib_port_gid_attr_release(struct kobject *kobj)
653 {
654 struct gid_attr_group *g = container_of(kobj, struct gid_attr_group,
655 kobj);
656 struct attribute *a;
657 int i;
658
659 if (g->ndev.attrs) {
660 for (i = 0; (a = g->ndev.attrs[i]); ++i)
661 kfree(a);
662
663 kfree(g->ndev.attrs);
664 }
665
666 if (g->type.attrs) {
667 for (i = 0; (a = g->type.attrs[i]); ++i)
668 kfree(a);
669
670 kfree(g->type.attrs);
671 }
672
673 kfree(g);
674 }
675
676 static struct kobj_type port_type = {
677 .release = ib_port_release,
678 .sysfs_ops = &port_sysfs_ops,
679 .default_attrs = port_default_attrs
680 };
681
682 static struct kobj_type gid_attr_type = {
683 .sysfs_ops = &gid_attr_sysfs_ops,
684 .release = ib_port_gid_attr_release
685 };
686
687 static struct attribute **
688 alloc_group_attrs(ssize_t (*show)(struct ib_port *,
689 struct port_attribute *, char *buf),
690 int len)
691 {
692 struct attribute **tab_attr;
693 struct port_table_attribute *element;
694 int i;
695
696 tab_attr = kcalloc(1 + len, sizeof(struct attribute *), GFP_KERNEL);
697 if (!tab_attr)
698 return NULL;
699
700 for (i = 0; i < len; i++) {
701 element = kzalloc(sizeof(struct port_table_attribute),
702 GFP_KERNEL);
703 if (!element)
704 goto err;
705
706 if (snprintf(element->name, sizeof(element->name),
707 "%d", i) >= sizeof(element->name)) {
708 kfree(element);
709 goto err;
710 }
711
712 element->attr.attr.name = element->name;
713 element->attr.attr.mode = S_IRUGO;
714 element->attr.show = show;
715 element->index = i;
716 sysfs_attr_init(&element->attr.attr);
717
718 tab_attr[i] = &element->attr.attr;
719 }
720
721 return tab_attr;
722
723 err:
724 while (--i >= 0)
725 kfree(tab_attr[i]);
726 kfree(tab_attr);
727 return NULL;
728 }
729
730 /*
731 * Figure out which counter table to use depending on
732 * the device capabilities.
733 */
734 static struct attribute_group *get_counter_table(struct ib_device *dev,
735 int port_num)
736 {
737 struct ib_class_port_info cpi;
738
739 if (get_perf_mad(dev, port_num, IB_PMA_CLASS_PORT_INFO,
740 &cpi, 40, sizeof(cpi)) >= 0) {
741 if (cpi.capability_mask & IB_PMA_CLASS_CAP_EXT_WIDTH)
742 /* We have extended counters */
743 return &pma_group_ext;
744
745 if (cpi.capability_mask & IB_PMA_CLASS_CAP_EXT_WIDTH_NOIETF)
746 /* But not the IETF ones */
747 return &pma_group_noietf;
748 }
749
750 /* Fall back to normal counters */
751 return &pma_group;
752 }
753
754 static int update_hw_stats(struct ib_device *dev, struct rdma_hw_stats *stats,
755 u8 port_num, int index)
756 {
757 int ret;
758
759 if (time_is_after_eq_jiffies(stats->timestamp + stats->lifespan))
760 return 0;
761 ret = dev->get_hw_stats(dev, stats, port_num, index);
762 if (ret < 0)
763 return ret;
764 if (ret == stats->num_counters)
765 stats->timestamp = jiffies;
766
767 return 0;
768 }
769
770 static ssize_t print_hw_stat(struct rdma_hw_stats *stats, int index, char *buf)
771 {
772 return sprintf(buf, "%llu\n", stats->value[index]);
773 }
774
775 static ssize_t show_hw_stats(struct kobject *kobj, struct attribute *attr,
776 char *buf)
777 {
778 struct ib_device *dev;
779 struct ib_port *port;
780 struct hw_stats_attribute *hsa;
781 struct rdma_hw_stats *stats;
782 int ret;
783
784 hsa = container_of(attr, struct hw_stats_attribute, attr);
785 if (!hsa->port_num) {
786 dev = container_of((struct device *)kobj,
787 struct ib_device, dev);
788 stats = dev->hw_stats;
789 } else {
790 port = container_of(kobj, struct ib_port, kobj);
791 dev = port->ibdev;
792 stats = port->hw_stats;
793 }
794 ret = update_hw_stats(dev, stats, hsa->port_num, hsa->index);
795 if (ret)
796 return ret;
797 return print_hw_stat(stats, hsa->index, buf);
798 }
799
800 static ssize_t show_stats_lifespan(struct kobject *kobj,
801 struct attribute *attr,
802 char *buf)
803 {
804 struct hw_stats_attribute *hsa;
805 int msecs;
806
807 hsa = container_of(attr, struct hw_stats_attribute, attr);
808 if (!hsa->port_num) {
809 struct ib_device *dev = container_of((struct device *)kobj,
810 struct ib_device, dev);
811 msecs = jiffies_to_msecs(dev->hw_stats->lifespan);
812 } else {
813 struct ib_port *p = container_of(kobj, struct ib_port, kobj);
814 msecs = jiffies_to_msecs(p->hw_stats->lifespan);
815 }
816 return sprintf(buf, "%d\n", msecs);
817 }
818
819 static ssize_t set_stats_lifespan(struct kobject *kobj,
820 struct attribute *attr,
821 const char *buf, size_t count)
822 {
823 struct hw_stats_attribute *hsa;
824 int msecs;
825 int jiffies;
826 int ret;
827
828 ret = kstrtoint(buf, 10, &msecs);
829 if (ret)
830 return ret;
831 if (msecs < 0 || msecs > 10000)
832 return -EINVAL;
833 jiffies = msecs_to_jiffies(msecs);
834 hsa = container_of(attr, struct hw_stats_attribute, attr);
835 if (!hsa->port_num) {
836 struct ib_device *dev = container_of((struct device *)kobj,
837 struct ib_device, dev);
838 dev->hw_stats->lifespan = jiffies;
839 } else {
840 struct ib_port *p = container_of(kobj, struct ib_port, kobj);
841 p->hw_stats->lifespan = jiffies;
842 }
843 return count;
844 }
845
846 static void free_hsag(struct kobject *kobj, struct attribute_group *attr_group)
847 {
848 struct attribute **attr;
849
850 sysfs_remove_group(kobj, attr_group);
851
852 for (attr = attr_group->attrs; *attr; attr++)
853 kfree(*attr);
854 kfree(attr_group);
855 }
856
857 static struct attribute *alloc_hsa(int index, u8 port_num, const char *name)
858 {
859 struct hw_stats_attribute *hsa;
860
861 hsa = kmalloc(sizeof(*hsa), GFP_KERNEL);
862 if (!hsa)
863 return NULL;
864
865 hsa->attr.name = (char *)name;
866 hsa->attr.mode = S_IRUGO;
867 hsa->show = show_hw_stats;
868 hsa->store = NULL;
869 hsa->index = index;
870 hsa->port_num = port_num;
871
872 return &hsa->attr;
873 }
874
875 static struct attribute *alloc_hsa_lifespan(char *name, u8 port_num)
876 {
877 struct hw_stats_attribute *hsa;
878
879 hsa = kmalloc(sizeof(*hsa), GFP_KERNEL);
880 if (!hsa)
881 return NULL;
882
883 hsa->attr.name = name;
884 hsa->attr.mode = S_IWUSR | S_IRUGO;
885 hsa->show = show_stats_lifespan;
886 hsa->store = set_stats_lifespan;
887 hsa->index = 0;
888 hsa->port_num = port_num;
889
890 return &hsa->attr;
891 }
892
893 static void setup_hw_stats(struct ib_device *device, struct ib_port *port,
894 u8 port_num)
895 {
896 struct attribute_group *hsag;
897 struct rdma_hw_stats *stats;
898 int i, ret;
899
900 stats = device->alloc_hw_stats(device, port_num);
901
902 if (!stats)
903 return;
904
905 if (!stats->names || stats->num_counters <= 0)
906 goto err_free_stats;
907
908 /*
909 * Two extra attribue elements here, one for the lifespan entry and
910 * one to NULL terminate the list for the sysfs core code
911 */
912 hsag = kzalloc(sizeof(*hsag) +
913 sizeof(void *) * (stats->num_counters + 2),
914 GFP_KERNEL);
915 if (!hsag)
916 goto err_free_stats;
917
918 ret = device->get_hw_stats(device, stats, port_num,
919 stats->num_counters);
920 if (ret != stats->num_counters)
921 goto err_free_hsag;
922
923 stats->timestamp = jiffies;
924
925 hsag->name = "hw_counters";
926 hsag->attrs = (void *)hsag + sizeof(*hsag);
927
928 for (i = 0; i < stats->num_counters; i++) {
929 hsag->attrs[i] = alloc_hsa(i, port_num, stats->names[i]);
930 if (!hsag->attrs[i])
931 goto err;
932 sysfs_attr_init(hsag->attrs[i]);
933 }
934
935 /* treat an error here as non-fatal */
936 hsag->attrs[i] = alloc_hsa_lifespan("lifespan", port_num);
937 if (hsag->attrs[i])
938 sysfs_attr_init(hsag->attrs[i]);
939
940 if (port) {
941 struct kobject *kobj = &port->kobj;
942 ret = sysfs_create_group(kobj, hsag);
943 if (ret)
944 goto err;
945 port->hw_stats_ag = hsag;
946 port->hw_stats = stats;
947 } else {
948 struct kobject *kobj = &device->dev.kobj;
949 ret = sysfs_create_group(kobj, hsag);
950 if (ret)
951 goto err;
952 device->hw_stats_ag = hsag;
953 device->hw_stats = stats;
954 }
955
956 return;
957
958 err:
959 for (; i >= 0; i--)
960 kfree(hsag->attrs[i]);
961 err_free_hsag:
962 kfree(hsag);
963 err_free_stats:
964 kfree(stats);
965 return;
966 }
967
968 static int add_port(struct ib_device *device, int port_num,
969 int (*port_callback)(struct ib_device *,
970 u8, struct kobject *))
971 {
972 struct ib_port *p;
973 struct ib_port_attr attr;
974 int i;
975 int ret;
976
977 ret = ib_query_port(device, port_num, &attr);
978 if (ret)
979 return ret;
980
981 p = kzalloc(sizeof *p, GFP_KERNEL);
982 if (!p)
983 return -ENOMEM;
984
985 p->ibdev = device;
986 p->port_num = port_num;
987
988 ret = kobject_init_and_add(&p->kobj, &port_type,
989 device->ports_parent,
990 "%d", port_num);
991 if (ret) {
992 kfree(p);
993 return ret;
994 }
995
996 p->gid_attr_group = kzalloc(sizeof(*p->gid_attr_group), GFP_KERNEL);
997 if (!p->gid_attr_group) {
998 ret = -ENOMEM;
999 goto err_put;
1000 }
1001
1002 p->gid_attr_group->port = p;
1003 ret = kobject_init_and_add(&p->gid_attr_group->kobj, &gid_attr_type,
1004 &p->kobj, "gid_attrs");
1005 if (ret) {
1006 kfree(p->gid_attr_group);
1007 goto err_put;
1008 }
1009
1010 p->pma_table = get_counter_table(device, port_num);
1011 ret = sysfs_create_group(&p->kobj, p->pma_table);
1012 if (ret)
1013 goto err_put_gid_attrs;
1014
1015 p->gid_group.name = "gids";
1016 p->gid_group.attrs = alloc_group_attrs(show_port_gid, attr.gid_tbl_len);
1017 if (!p->gid_group.attrs) {
1018 ret = -ENOMEM;
1019 goto err_remove_pma;
1020 }
1021
1022 ret = sysfs_create_group(&p->kobj, &p->gid_group);
1023 if (ret)
1024 goto err_free_gid;
1025
1026 p->gid_attr_group->ndev.name = "ndevs";
1027 p->gid_attr_group->ndev.attrs = alloc_group_attrs(show_port_gid_attr_ndev,
1028 attr.gid_tbl_len);
1029 if (!p->gid_attr_group->ndev.attrs) {
1030 ret = -ENOMEM;
1031 goto err_remove_gid;
1032 }
1033
1034 ret = sysfs_create_group(&p->gid_attr_group->kobj,
1035 &p->gid_attr_group->ndev);
1036 if (ret)
1037 goto err_free_gid_ndev;
1038
1039 p->gid_attr_group->type.name = "types";
1040 p->gid_attr_group->type.attrs = alloc_group_attrs(show_port_gid_attr_gid_type,
1041 attr.gid_tbl_len);
1042 if (!p->gid_attr_group->type.attrs) {
1043 ret = -ENOMEM;
1044 goto err_remove_gid_ndev;
1045 }
1046
1047 ret = sysfs_create_group(&p->gid_attr_group->kobj,
1048 &p->gid_attr_group->type);
1049 if (ret)
1050 goto err_free_gid_type;
1051
1052 p->pkey_group.name = "pkeys";
1053 p->pkey_group.attrs = alloc_group_attrs(show_port_pkey,
1054 attr.pkey_tbl_len);
1055 if (!p->pkey_group.attrs) {
1056 ret = -ENOMEM;
1057 goto err_remove_gid_type;
1058 }
1059
1060 ret = sysfs_create_group(&p->kobj, &p->pkey_group);
1061 if (ret)
1062 goto err_free_pkey;
1063
1064 if (port_callback) {
1065 ret = port_callback(device, port_num, &p->kobj);
1066 if (ret)
1067 goto err_remove_pkey;
1068 }
1069
1070 /*
1071 * If port == 0, it means we have only one port and the parent
1072 * device, not this port device, should be the holder of the
1073 * hw_counters
1074 */
1075 if (device->alloc_hw_stats && port_num)
1076 setup_hw_stats(device, p, port_num);
1077
1078 list_add_tail(&p->kobj.entry, &device->port_list);
1079
1080 kobject_uevent(&p->kobj, KOBJ_ADD);
1081 return 0;
1082
1083 err_remove_pkey:
1084 sysfs_remove_group(&p->kobj, &p->pkey_group);
1085
1086 err_free_pkey:
1087 for (i = 0; i < attr.pkey_tbl_len; ++i)
1088 kfree(p->pkey_group.attrs[i]);
1089
1090 kfree(p->pkey_group.attrs);
1091 p->pkey_group.attrs = NULL;
1092
1093 err_remove_gid_type:
1094 sysfs_remove_group(&p->gid_attr_group->kobj,
1095 &p->gid_attr_group->type);
1096
1097 err_free_gid_type:
1098 for (i = 0; i < attr.gid_tbl_len; ++i)
1099 kfree(p->gid_attr_group->type.attrs[i]);
1100
1101 kfree(p->gid_attr_group->type.attrs);
1102 p->gid_attr_group->type.attrs = NULL;
1103
1104 err_remove_gid_ndev:
1105 sysfs_remove_group(&p->gid_attr_group->kobj,
1106 &p->gid_attr_group->ndev);
1107
1108 err_free_gid_ndev:
1109 for (i = 0; i < attr.gid_tbl_len; ++i)
1110 kfree(p->gid_attr_group->ndev.attrs[i]);
1111
1112 kfree(p->gid_attr_group->ndev.attrs);
1113 p->gid_attr_group->ndev.attrs = NULL;
1114
1115 err_remove_gid:
1116 sysfs_remove_group(&p->kobj, &p->gid_group);
1117
1118 err_free_gid:
1119 for (i = 0; i < attr.gid_tbl_len; ++i)
1120 kfree(p->gid_group.attrs[i]);
1121
1122 kfree(p->gid_group.attrs);
1123 p->gid_group.attrs = NULL;
1124
1125 err_remove_pma:
1126 sysfs_remove_group(&p->kobj, p->pma_table);
1127
1128 err_put_gid_attrs:
1129 kobject_put(&p->gid_attr_group->kobj);
1130
1131 err_put:
1132 kobject_put(&p->kobj);
1133 return ret;
1134 }
1135
1136 static ssize_t show_node_type(struct device *device,
1137 struct device_attribute *attr, char *buf)
1138 {
1139 struct ib_device *dev = container_of(device, struct ib_device, dev);
1140
1141 switch (dev->node_type) {
1142 case RDMA_NODE_IB_CA: return sprintf(buf, "%d: CA\n", dev->node_type);
1143 case RDMA_NODE_RNIC: return sprintf(buf, "%d: RNIC\n", dev->node_type);
1144 case RDMA_NODE_USNIC: return sprintf(buf, "%d: usNIC\n", dev->node_type);
1145 case RDMA_NODE_USNIC_UDP: return sprintf(buf, "%d: usNIC UDP\n", dev->node_type);
1146 case RDMA_NODE_IB_SWITCH: return sprintf(buf, "%d: switch\n", dev->node_type);
1147 case RDMA_NODE_IB_ROUTER: return sprintf(buf, "%d: router\n", dev->node_type);
1148 default: return sprintf(buf, "%d: <unknown>\n", dev->node_type);
1149 }
1150 }
1151
1152 static ssize_t show_sys_image_guid(struct device *device,
1153 struct device_attribute *dev_attr, char *buf)
1154 {
1155 struct ib_device *dev = container_of(device, struct ib_device, dev);
1156
1157 return sprintf(buf, "%04x:%04x:%04x:%04x\n",
1158 be16_to_cpu(((__be16 *) &dev->attrs.sys_image_guid)[0]),
1159 be16_to_cpu(((__be16 *) &dev->attrs.sys_image_guid)[1]),
1160 be16_to_cpu(((__be16 *) &dev->attrs.sys_image_guid)[2]),
1161 be16_to_cpu(((__be16 *) &dev->attrs.sys_image_guid)[3]));
1162 }
1163
1164 static ssize_t show_node_guid(struct device *device,
1165 struct device_attribute *attr, char *buf)
1166 {
1167 struct ib_device *dev = container_of(device, struct ib_device, dev);
1168
1169 return sprintf(buf, "%04x:%04x:%04x:%04x\n",
1170 be16_to_cpu(((__be16 *) &dev->node_guid)[0]),
1171 be16_to_cpu(((__be16 *) &dev->node_guid)[1]),
1172 be16_to_cpu(((__be16 *) &dev->node_guid)[2]),
1173 be16_to_cpu(((__be16 *) &dev->node_guid)[3]));
1174 }
1175
1176 static ssize_t show_node_desc(struct device *device,
1177 struct device_attribute *attr, char *buf)
1178 {
1179 struct ib_device *dev = container_of(device, struct ib_device, dev);
1180
1181 return sprintf(buf, "%.64s\n", dev->node_desc);
1182 }
1183
1184 static ssize_t set_node_desc(struct device *device,
1185 struct device_attribute *attr,
1186 const char *buf, size_t count)
1187 {
1188 struct ib_device *dev = container_of(device, struct ib_device, dev);
1189 struct ib_device_modify desc = {};
1190 int ret;
1191
1192 if (!dev->modify_device)
1193 return -EIO;
1194
1195 memcpy(desc.node_desc, buf, min_t(int, count, 64));
1196 ret = ib_modify_device(dev, IB_DEVICE_MODIFY_NODE_DESC, &desc);
1197 if (ret)
1198 return ret;
1199
1200 return count;
1201 }
1202
1203 static DEVICE_ATTR(node_type, S_IRUGO, show_node_type, NULL);
1204 static DEVICE_ATTR(sys_image_guid, S_IRUGO, show_sys_image_guid, NULL);
1205 static DEVICE_ATTR(node_guid, S_IRUGO, show_node_guid, NULL);
1206 static DEVICE_ATTR(node_desc, S_IRUGO | S_IWUSR, show_node_desc, set_node_desc);
1207
1208 static struct device_attribute *ib_class_attributes[] = {
1209 &dev_attr_node_type,
1210 &dev_attr_sys_image_guid,
1211 &dev_attr_node_guid,
1212 &dev_attr_node_desc
1213 };
1214
1215 static void free_port_list_attributes(struct ib_device *device)
1216 {
1217 struct kobject *p, *t;
1218
1219 list_for_each_entry_safe(p, t, &device->port_list, entry) {
1220 struct ib_port *port = container_of(p, struct ib_port, kobj);
1221 list_del(&p->entry);
1222 if (port->hw_stats) {
1223 kfree(port->hw_stats);
1224 free_hsag(&port->kobj, port->hw_stats_ag);
1225 }
1226 sysfs_remove_group(p, port->pma_table);
1227 sysfs_remove_group(p, &port->pkey_group);
1228 sysfs_remove_group(p, &port->gid_group);
1229 sysfs_remove_group(&port->gid_attr_group->kobj,
1230 &port->gid_attr_group->ndev);
1231 sysfs_remove_group(&port->gid_attr_group->kobj,
1232 &port->gid_attr_group->type);
1233 kobject_put(&port->gid_attr_group->kobj);
1234 kobject_put(p);
1235 }
1236
1237 kobject_put(device->ports_parent);
1238 }
1239
1240 int ib_device_register_sysfs(struct ib_device *device,
1241 int (*port_callback)(struct ib_device *,
1242 u8, struct kobject *))
1243 {
1244 struct device *class_dev = &device->dev;
1245 int ret;
1246 int i;
1247
1248 device->dev.parent = device->dma_device;
1249 ret = dev_set_name(class_dev, "%s", device->name);
1250 if (ret)
1251 return ret;
1252
1253 ret = device_add(class_dev);
1254 if (ret)
1255 goto err;
1256
1257 for (i = 0; i < ARRAY_SIZE(ib_class_attributes); ++i) {
1258 ret = device_create_file(class_dev, ib_class_attributes[i]);
1259 if (ret)
1260 goto err_unregister;
1261 }
1262
1263 device->ports_parent = kobject_create_and_add("ports",
1264 &class_dev->kobj);
1265 if (!device->ports_parent) {
1266 ret = -ENOMEM;
1267 goto err_put;
1268 }
1269
1270 if (rdma_cap_ib_switch(device)) {
1271 ret = add_port(device, 0, port_callback);
1272 if (ret)
1273 goto err_put;
1274 } else {
1275 for (i = 1; i <= device->phys_port_cnt; ++i) {
1276 ret = add_port(device, i, port_callback);
1277 if (ret)
1278 goto err_put;
1279 }
1280 }
1281
1282 if (device->alloc_hw_stats)
1283 setup_hw_stats(device, NULL, 0);
1284
1285 return 0;
1286
1287 err_put:
1288 free_port_list_attributes(device);
1289
1290 err_unregister:
1291 device_unregister(class_dev);
1292
1293 err:
1294 return ret;
1295 }
1296
1297 void ib_device_unregister_sysfs(struct ib_device *device)
1298 {
1299 int i;
1300
1301 /* Hold kobject until ib_dealloc_device() */
1302 kobject_get(&device->dev.kobj);
1303
1304 free_port_list_attributes(device);
1305
1306 if (device->hw_stats) {
1307 kfree(device->hw_stats);
1308 free_hsag(&device->dev.kobj, device->hw_stats_ag);
1309 }
1310
1311 for (i = 0; i < ARRAY_SIZE(ib_class_attributes); ++i)
1312 device_remove_file(&device->dev, ib_class_attributes[i]);
1313
1314 device_unregister(&device->dev);
1315 }
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