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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
[deliverable/linux.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 #include <linux/ethtool.h>
42
43 #include <rdma/ib_mad.h>
44 #include <rdma/ib_pma.h>
45
46 struct ib_port;
47
48 struct gid_attr_group {
49 struct ib_port *port;
50 struct kobject kobj;
51 struct attribute_group ndev;
52 struct attribute_group type;
53 };
54 struct ib_port {
55 struct kobject kobj;
56 struct ib_device *ibdev;
57 struct gid_attr_group *gid_attr_group;
58 struct attribute_group gid_group;
59 struct attribute_group pkey_group;
60 struct attribute_group *pma_table;
61 struct attribute_group *hw_stats_ag;
62 struct rdma_hw_stats *hw_stats;
63 u8 port_num;
64 };
65
66 struct port_attribute {
67 struct attribute attr;
68 ssize_t (*show)(struct ib_port *, struct port_attribute *, char *buf);
69 ssize_t (*store)(struct ib_port *, struct port_attribute *,
70 const char *buf, size_t count);
71 };
72
73 #define PORT_ATTR(_name, _mode, _show, _store) \
74 struct port_attribute port_attr_##_name = __ATTR(_name, _mode, _show, _store)
75
76 #define PORT_ATTR_RO(_name) \
77 struct port_attribute port_attr_##_name = __ATTR_RO(_name)
78
79 struct port_table_attribute {
80 struct port_attribute attr;
81 char name[8];
82 int index;
83 __be16 attr_id;
84 };
85
86 struct hw_stats_attribute {
87 struct attribute attr;
88 ssize_t (*show)(struct kobject *kobj,
89 struct attribute *attr, char *buf);
90 ssize_t (*store)(struct kobject *kobj,
91 struct attribute *attr,
92 const char *buf,
93 size_t count);
94 int index;
95 u8 port_num;
96 };
97
98 static ssize_t port_attr_show(struct kobject *kobj,
99 struct attribute *attr, char *buf)
100 {
101 struct port_attribute *port_attr =
102 container_of(attr, struct port_attribute, attr);
103 struct ib_port *p = container_of(kobj, struct ib_port, kobj);
104
105 if (!port_attr->show)
106 return -EIO;
107
108 return port_attr->show(p, port_attr, buf);
109 }
110
111 static const struct sysfs_ops port_sysfs_ops = {
112 .show = port_attr_show
113 };
114
115 static ssize_t gid_attr_show(struct kobject *kobj,
116 struct attribute *attr, char *buf)
117 {
118 struct port_attribute *port_attr =
119 container_of(attr, struct port_attribute, attr);
120 struct ib_port *p = container_of(kobj, struct gid_attr_group,
121 kobj)->port;
122
123 if (!port_attr->show)
124 return -EIO;
125
126 return port_attr->show(p, port_attr, buf);
127 }
128
129 static const struct sysfs_ops gid_attr_sysfs_ops = {
130 .show = gid_attr_show
131 };
132
133 static ssize_t state_show(struct ib_port *p, struct port_attribute *unused,
134 char *buf)
135 {
136 struct ib_port_attr attr;
137 ssize_t ret;
138
139 static const char *state_name[] = {
140 [IB_PORT_NOP] = "NOP",
141 [IB_PORT_DOWN] = "DOWN",
142 [IB_PORT_INIT] = "INIT",
143 [IB_PORT_ARMED] = "ARMED",
144 [IB_PORT_ACTIVE] = "ACTIVE",
145 [IB_PORT_ACTIVE_DEFER] = "ACTIVE_DEFER"
146 };
147
148 ret = ib_query_port(p->ibdev, p->port_num, &attr);
149 if (ret)
150 return ret;
151
152 return sprintf(buf, "%d: %s\n", attr.state,
153 attr.state >= 0 && attr.state < ARRAY_SIZE(state_name) ?
154 state_name[attr.state] : "UNKNOWN");
155 }
156
157 static ssize_t lid_show(struct ib_port *p, struct port_attribute *unused,
158 char *buf)
159 {
160 struct ib_port_attr attr;
161 ssize_t ret;
162
163 ret = ib_query_port(p->ibdev, p->port_num, &attr);
164 if (ret)
165 return ret;
166
167 return sprintf(buf, "0x%x\n", attr.lid);
168 }
169
170 static ssize_t lid_mask_count_show(struct ib_port *p,
171 struct port_attribute *unused,
172 char *buf)
173 {
174 struct ib_port_attr attr;
175 ssize_t ret;
176
177 ret = ib_query_port(p->ibdev, p->port_num, &attr);
178 if (ret)
179 return ret;
180
181 return sprintf(buf, "%d\n", attr.lmc);
182 }
183
184 static ssize_t sm_lid_show(struct ib_port *p, struct port_attribute *unused,
185 char *buf)
186 {
187 struct ib_port_attr attr;
188 ssize_t ret;
189
190 ret = ib_query_port(p->ibdev, p->port_num, &attr);
191 if (ret)
192 return ret;
193
194 return sprintf(buf, "0x%x\n", attr.sm_lid);
195 }
196
197 static ssize_t sm_sl_show(struct ib_port *p, struct port_attribute *unused,
198 char *buf)
199 {
200 struct ib_port_attr attr;
201 ssize_t ret;
202
203 ret = ib_query_port(p->ibdev, p->port_num, &attr);
204 if (ret)
205 return ret;
206
207 return sprintf(buf, "%d\n", attr.sm_sl);
208 }
209
210 static ssize_t cap_mask_show(struct ib_port *p, struct port_attribute *unused,
211 char *buf)
212 {
213 struct ib_port_attr attr;
214 ssize_t ret;
215
216 ret = ib_query_port(p->ibdev, p->port_num, &attr);
217 if (ret)
218 return ret;
219
220 return sprintf(buf, "0x%08x\n", attr.port_cap_flags);
221 }
222
223 static ssize_t rate_show(struct ib_port *p, struct port_attribute *unused,
224 char *buf)
225 {
226 struct ib_port_attr attr;
227 char *speed = "";
228 int rate; /* in deci-Gb/sec */
229 ssize_t ret;
230
231 ret = ib_query_port(p->ibdev, p->port_num, &attr);
232 if (ret)
233 return ret;
234
235 switch (attr.active_speed) {
236 case IB_SPEED_DDR:
237 speed = " DDR";
238 rate = 50;
239 break;
240 case IB_SPEED_QDR:
241 speed = " QDR";
242 rate = 100;
243 break;
244 case IB_SPEED_FDR10:
245 speed = " FDR10";
246 rate = 100;
247 break;
248 case IB_SPEED_FDR:
249 speed = " FDR";
250 rate = 140;
251 break;
252 case IB_SPEED_EDR:
253 speed = " EDR";
254 rate = 250;
255 break;
256 case IB_SPEED_SDR:
257 default: /* default to SDR for invalid rates */
258 rate = 25;
259 break;
260 }
261
262 rate *= ib_width_enum_to_int(attr.active_width);
263 if (rate < 0)
264 return -EINVAL;
265
266 return sprintf(buf, "%d%s Gb/sec (%dX%s)\n",
267 rate / 10, rate % 10 ? ".5" : "",
268 ib_width_enum_to_int(attr.active_width), speed);
269 }
270
271 static ssize_t phys_state_show(struct ib_port *p, struct port_attribute *unused,
272 char *buf)
273 {
274 struct ib_port_attr attr;
275
276 ssize_t ret;
277
278 ret = ib_query_port(p->ibdev, p->port_num, &attr);
279 if (ret)
280 return ret;
281
282 switch (attr.phys_state) {
283 case 1: return sprintf(buf, "1: Sleep\n");
284 case 2: return sprintf(buf, "2: Polling\n");
285 case 3: return sprintf(buf, "3: Disabled\n");
286 case 4: return sprintf(buf, "4: PortConfigurationTraining\n");
287 case 5: return sprintf(buf, "5: LinkUp\n");
288 case 6: return sprintf(buf, "6: LinkErrorRecovery\n");
289 case 7: return sprintf(buf, "7: Phy Test\n");
290 default: return sprintf(buf, "%d: <unknown>\n", attr.phys_state);
291 }
292 }
293
294 static ssize_t link_layer_show(struct ib_port *p, struct port_attribute *unused,
295 char *buf)
296 {
297 switch (rdma_port_get_link_layer(p->ibdev, p->port_num)) {
298 case IB_LINK_LAYER_INFINIBAND:
299 return sprintf(buf, "%s\n", "InfiniBand");
300 case IB_LINK_LAYER_ETHERNET:
301 return sprintf(buf, "%s\n", "Ethernet");
302 default:
303 return sprintf(buf, "%s\n", "Unknown");
304 }
305 }
306
307 static PORT_ATTR_RO(state);
308 static PORT_ATTR_RO(lid);
309 static PORT_ATTR_RO(lid_mask_count);
310 static PORT_ATTR_RO(sm_lid);
311 static PORT_ATTR_RO(sm_sl);
312 static PORT_ATTR_RO(cap_mask);
313 static PORT_ATTR_RO(rate);
314 static PORT_ATTR_RO(phys_state);
315 static PORT_ATTR_RO(link_layer);
316
317 static struct attribute *port_default_attrs[] = {
318 &port_attr_state.attr,
319 &port_attr_lid.attr,
320 &port_attr_lid_mask_count.attr,
321 &port_attr_sm_lid.attr,
322 &port_attr_sm_sl.attr,
323 &port_attr_cap_mask.attr,
324 &port_attr_rate.attr,
325 &port_attr_phys_state.attr,
326 &port_attr_link_layer.attr,
327 NULL
328 };
329
330 static size_t print_ndev(struct ib_gid_attr *gid_attr, char *buf)
331 {
332 if (!gid_attr->ndev)
333 return -EINVAL;
334
335 return sprintf(buf, "%s\n", gid_attr->ndev->name);
336 }
337
338 static size_t print_gid_type(struct ib_gid_attr *gid_attr, char *buf)
339 {
340 return sprintf(buf, "%s\n", ib_cache_gid_type_str(gid_attr->gid_type));
341 }
342
343 static ssize_t _show_port_gid_attr(struct ib_port *p,
344 struct port_attribute *attr,
345 char *buf,
346 size_t (*print)(struct ib_gid_attr *gid_attr,
347 char *buf))
348 {
349 struct port_table_attribute *tab_attr =
350 container_of(attr, struct port_table_attribute, attr);
351 union ib_gid gid;
352 struct ib_gid_attr gid_attr = {};
353 ssize_t ret;
354
355 ret = ib_query_gid(p->ibdev, p->port_num, tab_attr->index, &gid,
356 &gid_attr);
357 if (ret)
358 goto err;
359
360 ret = print(&gid_attr, buf);
361
362 err:
363 if (gid_attr.ndev)
364 dev_put(gid_attr.ndev);
365 return ret;
366 }
367
368 static ssize_t show_port_gid(struct ib_port *p, struct port_attribute *attr,
369 char *buf)
370 {
371 struct port_table_attribute *tab_attr =
372 container_of(attr, struct port_table_attribute, attr);
373 union ib_gid gid;
374 ssize_t ret;
375
376 ret = ib_query_gid(p->ibdev, p->port_num, tab_attr->index, &gid, NULL);
377 if (ret)
378 return ret;
379
380 return sprintf(buf, "%pI6\n", gid.raw);
381 }
382
383 static ssize_t show_port_gid_attr_ndev(struct ib_port *p,
384 struct port_attribute *attr, char *buf)
385 {
386 return _show_port_gid_attr(p, attr, buf, print_ndev);
387 }
388
389 static ssize_t show_port_gid_attr_gid_type(struct ib_port *p,
390 struct port_attribute *attr,
391 char *buf)
392 {
393 return _show_port_gid_attr(p, attr, buf, print_gid_type);
394 }
395
396 static ssize_t show_port_pkey(struct ib_port *p, struct port_attribute *attr,
397 char *buf)
398 {
399 struct port_table_attribute *tab_attr =
400 container_of(attr, struct port_table_attribute, attr);
401 u16 pkey;
402 ssize_t ret;
403
404 ret = ib_query_pkey(p->ibdev, p->port_num, tab_attr->index, &pkey);
405 if (ret)
406 return ret;
407
408 return sprintf(buf, "0x%04x\n", pkey);
409 }
410
411 #define PORT_PMA_ATTR(_name, _counter, _width, _offset) \
412 struct port_table_attribute port_pma_attr_##_name = { \
413 .attr = __ATTR(_name, S_IRUGO, show_pma_counter, NULL), \
414 .index = (_offset) | ((_width) << 16) | ((_counter) << 24), \
415 .attr_id = IB_PMA_PORT_COUNTERS , \
416 }
417
418 #define PORT_PMA_ATTR_EXT(_name, _width, _offset) \
419 struct port_table_attribute port_pma_attr_ext_##_name = { \
420 .attr = __ATTR(_name, S_IRUGO, show_pma_counter, NULL), \
421 .index = (_offset) | ((_width) << 16), \
422 .attr_id = IB_PMA_PORT_COUNTERS_EXT , \
423 }
424
425 /*
426 * Get a Perfmgmt MAD block of data.
427 * Returns error code or the number of bytes retrieved.
428 */
429 static int get_perf_mad(struct ib_device *dev, int port_num, __be16 attr,
430 void *data, int offset, size_t size)
431 {
432 struct ib_mad *in_mad;
433 struct ib_mad *out_mad;
434 size_t mad_size = sizeof(*out_mad);
435 u16 out_mad_pkey_index = 0;
436 ssize_t ret;
437
438 if (!dev->process_mad)
439 return -ENOSYS;
440
441 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
442 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
443 if (!in_mad || !out_mad) {
444 ret = -ENOMEM;
445 goto out;
446 }
447
448 in_mad->mad_hdr.base_version = 1;
449 in_mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_PERF_MGMT;
450 in_mad->mad_hdr.class_version = 1;
451 in_mad->mad_hdr.method = IB_MGMT_METHOD_GET;
452 in_mad->mad_hdr.attr_id = attr;
453
454 if (attr != IB_PMA_CLASS_PORT_INFO)
455 in_mad->data[41] = port_num; /* PortSelect field */
456
457 if ((dev->process_mad(dev, IB_MAD_IGNORE_MKEY,
458 port_num, NULL, NULL,
459 (const struct ib_mad_hdr *)in_mad, mad_size,
460 (struct ib_mad_hdr *)out_mad, &mad_size,
461 &out_mad_pkey_index) &
462 (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) !=
463 (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) {
464 ret = -EINVAL;
465 goto out;
466 }
467 memcpy(data, out_mad->data + offset, size);
468 ret = size;
469 out:
470 kfree(in_mad);
471 kfree(out_mad);
472 return ret;
473 }
474
475 static ssize_t show_pma_counter(struct ib_port *p, struct port_attribute *attr,
476 char *buf)
477 {
478 struct port_table_attribute *tab_attr =
479 container_of(attr, struct port_table_attribute, attr);
480 int offset = tab_attr->index & 0xffff;
481 int width = (tab_attr->index >> 16) & 0xff;
482 ssize_t ret;
483 u8 data[8];
484
485 ret = get_perf_mad(p->ibdev, p->port_num, tab_attr->attr_id, &data,
486 40 + offset / 8, sizeof(data));
487 if (ret < 0)
488 return sprintf(buf, "N/A (no PMA)\n");
489
490 switch (width) {
491 case 4:
492 ret = sprintf(buf, "%u\n", (*data >>
493 (4 - (offset % 8))) & 0xf);
494 break;
495 case 8:
496 ret = sprintf(buf, "%u\n", *data);
497 break;
498 case 16:
499 ret = sprintf(buf, "%u\n",
500 be16_to_cpup((__be16 *)data));
501 break;
502 case 32:
503 ret = sprintf(buf, "%u\n",
504 be32_to_cpup((__be32 *)data));
505 break;
506 case 64:
507 ret = sprintf(buf, "%llu\n",
508 be64_to_cpup((__be64 *)data));
509 break;
510
511 default:
512 ret = 0;
513 }
514
515 return ret;
516 }
517
518 static PORT_PMA_ATTR(symbol_error , 0, 16, 32);
519 static PORT_PMA_ATTR(link_error_recovery , 1, 8, 48);
520 static PORT_PMA_ATTR(link_downed , 2, 8, 56);
521 static PORT_PMA_ATTR(port_rcv_errors , 3, 16, 64);
522 static PORT_PMA_ATTR(port_rcv_remote_physical_errors, 4, 16, 80);
523 static PORT_PMA_ATTR(port_rcv_switch_relay_errors , 5, 16, 96);
524 static PORT_PMA_ATTR(port_xmit_discards , 6, 16, 112);
525 static PORT_PMA_ATTR(port_xmit_constraint_errors , 7, 8, 128);
526 static PORT_PMA_ATTR(port_rcv_constraint_errors , 8, 8, 136);
527 static PORT_PMA_ATTR(local_link_integrity_errors , 9, 4, 152);
528 static PORT_PMA_ATTR(excessive_buffer_overrun_errors, 10, 4, 156);
529 static PORT_PMA_ATTR(VL15_dropped , 11, 16, 176);
530 static PORT_PMA_ATTR(port_xmit_data , 12, 32, 192);
531 static PORT_PMA_ATTR(port_rcv_data , 13, 32, 224);
532 static PORT_PMA_ATTR(port_xmit_packets , 14, 32, 256);
533 static PORT_PMA_ATTR(port_rcv_packets , 15, 32, 288);
534 static PORT_PMA_ATTR(port_xmit_wait , 0, 32, 320);
535
536 /*
537 * Counters added by extended set
538 */
539 static PORT_PMA_ATTR_EXT(port_xmit_data , 64, 64);
540 static PORT_PMA_ATTR_EXT(port_rcv_data , 64, 128);
541 static PORT_PMA_ATTR_EXT(port_xmit_packets , 64, 192);
542 static PORT_PMA_ATTR_EXT(port_rcv_packets , 64, 256);
543 static PORT_PMA_ATTR_EXT(unicast_xmit_packets , 64, 320);
544 static PORT_PMA_ATTR_EXT(unicast_rcv_packets , 64, 384);
545 static PORT_PMA_ATTR_EXT(multicast_xmit_packets , 64, 448);
546 static PORT_PMA_ATTR_EXT(multicast_rcv_packets , 64, 512);
547
548 static struct attribute *pma_attrs[] = {
549 &port_pma_attr_symbol_error.attr.attr,
550 &port_pma_attr_link_error_recovery.attr.attr,
551 &port_pma_attr_link_downed.attr.attr,
552 &port_pma_attr_port_rcv_errors.attr.attr,
553 &port_pma_attr_port_rcv_remote_physical_errors.attr.attr,
554 &port_pma_attr_port_rcv_switch_relay_errors.attr.attr,
555 &port_pma_attr_port_xmit_discards.attr.attr,
556 &port_pma_attr_port_xmit_constraint_errors.attr.attr,
557 &port_pma_attr_port_rcv_constraint_errors.attr.attr,
558 &port_pma_attr_local_link_integrity_errors.attr.attr,
559 &port_pma_attr_excessive_buffer_overrun_errors.attr.attr,
560 &port_pma_attr_VL15_dropped.attr.attr,
561 &port_pma_attr_port_xmit_data.attr.attr,
562 &port_pma_attr_port_rcv_data.attr.attr,
563 &port_pma_attr_port_xmit_packets.attr.attr,
564 &port_pma_attr_port_rcv_packets.attr.attr,
565 &port_pma_attr_port_xmit_wait.attr.attr,
566 NULL
567 };
568
569 static struct attribute *pma_attrs_ext[] = {
570 &port_pma_attr_symbol_error.attr.attr,
571 &port_pma_attr_link_error_recovery.attr.attr,
572 &port_pma_attr_link_downed.attr.attr,
573 &port_pma_attr_port_rcv_errors.attr.attr,
574 &port_pma_attr_port_rcv_remote_physical_errors.attr.attr,
575 &port_pma_attr_port_rcv_switch_relay_errors.attr.attr,
576 &port_pma_attr_port_xmit_discards.attr.attr,
577 &port_pma_attr_port_xmit_constraint_errors.attr.attr,
578 &port_pma_attr_port_rcv_constraint_errors.attr.attr,
579 &port_pma_attr_local_link_integrity_errors.attr.attr,
580 &port_pma_attr_excessive_buffer_overrun_errors.attr.attr,
581 &port_pma_attr_VL15_dropped.attr.attr,
582 &port_pma_attr_ext_port_xmit_data.attr.attr,
583 &port_pma_attr_ext_port_rcv_data.attr.attr,
584 &port_pma_attr_ext_port_xmit_packets.attr.attr,
585 &port_pma_attr_port_xmit_wait.attr.attr,
586 &port_pma_attr_ext_port_rcv_packets.attr.attr,
587 &port_pma_attr_ext_unicast_rcv_packets.attr.attr,
588 &port_pma_attr_ext_unicast_xmit_packets.attr.attr,
589 &port_pma_attr_ext_multicast_rcv_packets.attr.attr,
590 &port_pma_attr_ext_multicast_xmit_packets.attr.attr,
591 NULL
592 };
593
594 static struct attribute *pma_attrs_noietf[] = {
595 &port_pma_attr_symbol_error.attr.attr,
596 &port_pma_attr_link_error_recovery.attr.attr,
597 &port_pma_attr_link_downed.attr.attr,
598 &port_pma_attr_port_rcv_errors.attr.attr,
599 &port_pma_attr_port_rcv_remote_physical_errors.attr.attr,
600 &port_pma_attr_port_rcv_switch_relay_errors.attr.attr,
601 &port_pma_attr_port_xmit_discards.attr.attr,
602 &port_pma_attr_port_xmit_constraint_errors.attr.attr,
603 &port_pma_attr_port_rcv_constraint_errors.attr.attr,
604 &port_pma_attr_local_link_integrity_errors.attr.attr,
605 &port_pma_attr_excessive_buffer_overrun_errors.attr.attr,
606 &port_pma_attr_VL15_dropped.attr.attr,
607 &port_pma_attr_ext_port_xmit_data.attr.attr,
608 &port_pma_attr_ext_port_rcv_data.attr.attr,
609 &port_pma_attr_ext_port_xmit_packets.attr.attr,
610 &port_pma_attr_ext_port_rcv_packets.attr.attr,
611 &port_pma_attr_port_xmit_wait.attr.attr,
612 NULL
613 };
614
615 static struct attribute_group pma_group = {
616 .name = "counters",
617 .attrs = pma_attrs
618 };
619
620 static struct attribute_group pma_group_ext = {
621 .name = "counters",
622 .attrs = pma_attrs_ext
623 };
624
625 static struct attribute_group pma_group_noietf = {
626 .name = "counters",
627 .attrs = pma_attrs_noietf
628 };
629
630 static void ib_port_release(struct kobject *kobj)
631 {
632 struct ib_port *p = container_of(kobj, struct ib_port, kobj);
633 struct attribute *a;
634 int i;
635
636 if (p->gid_group.attrs) {
637 for (i = 0; (a = p->gid_group.attrs[i]); ++i)
638 kfree(a);
639
640 kfree(p->gid_group.attrs);
641 }
642
643 if (p->pkey_group.attrs) {
644 for (i = 0; (a = p->pkey_group.attrs[i]); ++i)
645 kfree(a);
646
647 kfree(p->pkey_group.attrs);
648 }
649
650 kfree(p);
651 }
652
653 static void ib_port_gid_attr_release(struct kobject *kobj)
654 {
655 struct gid_attr_group *g = container_of(kobj, struct gid_attr_group,
656 kobj);
657 struct attribute *a;
658 int i;
659
660 if (g->ndev.attrs) {
661 for (i = 0; (a = g->ndev.attrs[i]); ++i)
662 kfree(a);
663
664 kfree(g->ndev.attrs);
665 }
666
667 if (g->type.attrs) {
668 for (i = 0; (a = g->type.attrs[i]); ++i)
669 kfree(a);
670
671 kfree(g->type.attrs);
672 }
673
674 kfree(g);
675 }
676
677 static struct kobj_type port_type = {
678 .release = ib_port_release,
679 .sysfs_ops = &port_sysfs_ops,
680 .default_attrs = port_default_attrs
681 };
682
683 static struct kobj_type gid_attr_type = {
684 .sysfs_ops = &gid_attr_sysfs_ops,
685 .release = ib_port_gid_attr_release
686 };
687
688 static struct attribute **
689 alloc_group_attrs(ssize_t (*show)(struct ib_port *,
690 struct port_attribute *, char *buf),
691 int len)
692 {
693 struct attribute **tab_attr;
694 struct port_table_attribute *element;
695 int i;
696
697 tab_attr = kcalloc(1 + len, sizeof(struct attribute *), GFP_KERNEL);
698 if (!tab_attr)
699 return NULL;
700
701 for (i = 0; i < len; i++) {
702 element = kzalloc(sizeof(struct port_table_attribute),
703 GFP_KERNEL);
704 if (!element)
705 goto err;
706
707 if (snprintf(element->name, sizeof(element->name),
708 "%d", i) >= sizeof(element->name)) {
709 kfree(element);
710 goto err;
711 }
712
713 element->attr.attr.name = element->name;
714 element->attr.attr.mode = S_IRUGO;
715 element->attr.show = show;
716 element->index = i;
717 sysfs_attr_init(&element->attr.attr);
718
719 tab_attr[i] = &element->attr.attr;
720 }
721
722 return tab_attr;
723
724 err:
725 while (--i >= 0)
726 kfree(tab_attr[i]);
727 kfree(tab_attr);
728 return NULL;
729 }
730
731 /*
732 * Figure out which counter table to use depending on
733 * the device capabilities.
734 */
735 static struct attribute_group *get_counter_table(struct ib_device *dev,
736 int port_num)
737 {
738 struct ib_class_port_info cpi;
739
740 if (get_perf_mad(dev, port_num, IB_PMA_CLASS_PORT_INFO,
741 &cpi, 40, sizeof(cpi)) >= 0) {
742 if (cpi.capability_mask & IB_PMA_CLASS_CAP_EXT_WIDTH)
743 /* We have extended counters */
744 return &pma_group_ext;
745
746 if (cpi.capability_mask & IB_PMA_CLASS_CAP_EXT_WIDTH_NOIETF)
747 /* But not the IETF ones */
748 return &pma_group_noietf;
749 }
750
751 /* Fall back to normal counters */
752 return &pma_group;
753 }
754
755 static int update_hw_stats(struct ib_device *dev, struct rdma_hw_stats *stats,
756 u8 port_num, int index)
757 {
758 int ret;
759
760 if (time_is_after_eq_jiffies(stats->timestamp + stats->lifespan))
761 return 0;
762 ret = dev->get_hw_stats(dev, stats, port_num, index);
763 if (ret < 0)
764 return ret;
765 if (ret == stats->num_counters)
766 stats->timestamp = jiffies;
767
768 return 0;
769 }
770
771 static ssize_t print_hw_stat(struct rdma_hw_stats *stats, int index, char *buf)
772 {
773 return sprintf(buf, "%llu\n", stats->value[index]);
774 }
775
776 static ssize_t show_hw_stats(struct kobject *kobj, struct attribute *attr,
777 char *buf)
778 {
779 struct ib_device *dev;
780 struct ib_port *port;
781 struct hw_stats_attribute *hsa;
782 struct rdma_hw_stats *stats;
783 int ret;
784
785 hsa = container_of(attr, struct hw_stats_attribute, attr);
786 if (!hsa->port_num) {
787 dev = container_of((struct device *)kobj,
788 struct ib_device, dev);
789 stats = dev->hw_stats;
790 } else {
791 port = container_of(kobj, struct ib_port, kobj);
792 dev = port->ibdev;
793 stats = port->hw_stats;
794 }
795 ret = update_hw_stats(dev, stats, hsa->port_num, hsa->index);
796 if (ret)
797 return ret;
798 return print_hw_stat(stats, hsa->index, buf);
799 }
800
801 static ssize_t show_stats_lifespan(struct kobject *kobj,
802 struct attribute *attr,
803 char *buf)
804 {
805 struct hw_stats_attribute *hsa;
806 int msecs;
807
808 hsa = container_of(attr, struct hw_stats_attribute, attr);
809 if (!hsa->port_num) {
810 struct ib_device *dev = container_of((struct device *)kobj,
811 struct ib_device, dev);
812 msecs = jiffies_to_msecs(dev->hw_stats->lifespan);
813 } else {
814 struct ib_port *p = container_of(kobj, struct ib_port, kobj);
815 msecs = jiffies_to_msecs(p->hw_stats->lifespan);
816 }
817 return sprintf(buf, "%d\n", msecs);
818 }
819
820 static ssize_t set_stats_lifespan(struct kobject *kobj,
821 struct attribute *attr,
822 const char *buf, size_t count)
823 {
824 struct hw_stats_attribute *hsa;
825 int msecs;
826 int jiffies;
827 int ret;
828
829 ret = kstrtoint(buf, 10, &msecs);
830 if (ret)
831 return ret;
832 if (msecs < 0 || msecs > 10000)
833 return -EINVAL;
834 jiffies = msecs_to_jiffies(msecs);
835 hsa = container_of(attr, struct hw_stats_attribute, attr);
836 if (!hsa->port_num) {
837 struct ib_device *dev = container_of((struct device *)kobj,
838 struct ib_device, dev);
839 dev->hw_stats->lifespan = jiffies;
840 } else {
841 struct ib_port *p = container_of(kobj, struct ib_port, kobj);
842 p->hw_stats->lifespan = jiffies;
843 }
844 return count;
845 }
846
847 static void free_hsag(struct kobject *kobj, struct attribute_group *attr_group)
848 {
849 struct attribute **attr;
850
851 sysfs_remove_group(kobj, attr_group);
852
853 for (attr = attr_group->attrs; *attr; attr++)
854 kfree(*attr);
855 kfree(attr_group);
856 }
857
858 static struct attribute *alloc_hsa(int index, u8 port_num, const char *name)
859 {
860 struct hw_stats_attribute *hsa;
861
862 hsa = kmalloc(sizeof(*hsa), GFP_KERNEL);
863 if (!hsa)
864 return NULL;
865
866 hsa->attr.name = (char *)name;
867 hsa->attr.mode = S_IRUGO;
868 hsa->show = show_hw_stats;
869 hsa->store = NULL;
870 hsa->index = index;
871 hsa->port_num = port_num;
872
873 return &hsa->attr;
874 }
875
876 static struct attribute *alloc_hsa_lifespan(char *name, u8 port_num)
877 {
878 struct hw_stats_attribute *hsa;
879
880 hsa = kmalloc(sizeof(*hsa), GFP_KERNEL);
881 if (!hsa)
882 return NULL;
883
884 hsa->attr.name = name;
885 hsa->attr.mode = S_IWUSR | S_IRUGO;
886 hsa->show = show_stats_lifespan;
887 hsa->store = set_stats_lifespan;
888 hsa->index = 0;
889 hsa->port_num = port_num;
890
891 return &hsa->attr;
892 }
893
894 static void setup_hw_stats(struct ib_device *device, struct ib_port *port,
895 u8 port_num)
896 {
897 struct attribute_group *hsag;
898 struct rdma_hw_stats *stats;
899 int i, ret;
900
901 stats = device->alloc_hw_stats(device, port_num);
902
903 if (!stats)
904 return;
905
906 if (!stats->names || stats->num_counters <= 0)
907 goto err_free_stats;
908
909 /*
910 * Two extra attribue elements here, one for the lifespan entry and
911 * one to NULL terminate the list for the sysfs core code
912 */
913 hsag = kzalloc(sizeof(*hsag) +
914 sizeof(void *) * (stats->num_counters + 2),
915 GFP_KERNEL);
916 if (!hsag)
917 goto err_free_stats;
918
919 ret = device->get_hw_stats(device, stats, port_num,
920 stats->num_counters);
921 if (ret != stats->num_counters)
922 goto err_free_hsag;
923
924 stats->timestamp = jiffies;
925
926 hsag->name = "hw_counters";
927 hsag->attrs = (void *)hsag + sizeof(*hsag);
928
929 for (i = 0; i < stats->num_counters; i++) {
930 hsag->attrs[i] = alloc_hsa(i, port_num, stats->names[i]);
931 if (!hsag->attrs[i])
932 goto err;
933 sysfs_attr_init(hsag->attrs[i]);
934 }
935
936 /* treat an error here as non-fatal */
937 hsag->attrs[i] = alloc_hsa_lifespan("lifespan", port_num);
938 if (hsag->attrs[i])
939 sysfs_attr_init(hsag->attrs[i]);
940
941 if (port) {
942 struct kobject *kobj = &port->kobj;
943 ret = sysfs_create_group(kobj, hsag);
944 if (ret)
945 goto err;
946 port->hw_stats_ag = hsag;
947 port->hw_stats = stats;
948 } else {
949 struct kobject *kobj = &device->dev.kobj;
950 ret = sysfs_create_group(kobj, hsag);
951 if (ret)
952 goto err;
953 device->hw_stats_ag = hsag;
954 device->hw_stats = stats;
955 }
956
957 return;
958
959 err:
960 for (; i >= 0; i--)
961 kfree(hsag->attrs[i]);
962 err_free_hsag:
963 kfree(hsag);
964 err_free_stats:
965 kfree(stats);
966 return;
967 }
968
969 static int add_port(struct ib_device *device, int port_num,
970 int (*port_callback)(struct ib_device *,
971 u8, struct kobject *))
972 {
973 struct ib_port *p;
974 struct ib_port_attr attr;
975 int i;
976 int ret;
977
978 ret = ib_query_port(device, port_num, &attr);
979 if (ret)
980 return ret;
981
982 p = kzalloc(sizeof *p, GFP_KERNEL);
983 if (!p)
984 return -ENOMEM;
985
986 p->ibdev = device;
987 p->port_num = port_num;
988
989 ret = kobject_init_and_add(&p->kobj, &port_type,
990 device->ports_parent,
991 "%d", port_num);
992 if (ret) {
993 kfree(p);
994 return ret;
995 }
996
997 p->gid_attr_group = kzalloc(sizeof(*p->gid_attr_group), GFP_KERNEL);
998 if (!p->gid_attr_group) {
999 ret = -ENOMEM;
1000 goto err_put;
1001 }
1002
1003 p->gid_attr_group->port = p;
1004 ret = kobject_init_and_add(&p->gid_attr_group->kobj, &gid_attr_type,
1005 &p->kobj, "gid_attrs");
1006 if (ret) {
1007 kfree(p->gid_attr_group);
1008 goto err_put;
1009 }
1010
1011 p->pma_table = get_counter_table(device, port_num);
1012 ret = sysfs_create_group(&p->kobj, p->pma_table);
1013 if (ret)
1014 goto err_put_gid_attrs;
1015
1016 p->gid_group.name = "gids";
1017 p->gid_group.attrs = alloc_group_attrs(show_port_gid, attr.gid_tbl_len);
1018 if (!p->gid_group.attrs) {
1019 ret = -ENOMEM;
1020 goto err_remove_pma;
1021 }
1022
1023 ret = sysfs_create_group(&p->kobj, &p->gid_group);
1024 if (ret)
1025 goto err_free_gid;
1026
1027 p->gid_attr_group->ndev.name = "ndevs";
1028 p->gid_attr_group->ndev.attrs = alloc_group_attrs(show_port_gid_attr_ndev,
1029 attr.gid_tbl_len);
1030 if (!p->gid_attr_group->ndev.attrs) {
1031 ret = -ENOMEM;
1032 goto err_remove_gid;
1033 }
1034
1035 ret = sysfs_create_group(&p->gid_attr_group->kobj,
1036 &p->gid_attr_group->ndev);
1037 if (ret)
1038 goto err_free_gid_ndev;
1039
1040 p->gid_attr_group->type.name = "types";
1041 p->gid_attr_group->type.attrs = alloc_group_attrs(show_port_gid_attr_gid_type,
1042 attr.gid_tbl_len);
1043 if (!p->gid_attr_group->type.attrs) {
1044 ret = -ENOMEM;
1045 goto err_remove_gid_ndev;
1046 }
1047
1048 ret = sysfs_create_group(&p->gid_attr_group->kobj,
1049 &p->gid_attr_group->type);
1050 if (ret)
1051 goto err_free_gid_type;
1052
1053 p->pkey_group.name = "pkeys";
1054 p->pkey_group.attrs = alloc_group_attrs(show_port_pkey,
1055 attr.pkey_tbl_len);
1056 if (!p->pkey_group.attrs) {
1057 ret = -ENOMEM;
1058 goto err_remove_gid_type;
1059 }
1060
1061 ret = sysfs_create_group(&p->kobj, &p->pkey_group);
1062 if (ret)
1063 goto err_free_pkey;
1064
1065 if (port_callback) {
1066 ret = port_callback(device, port_num, &p->kobj);
1067 if (ret)
1068 goto err_remove_pkey;
1069 }
1070
1071 /*
1072 * If port == 0, it means we have only one port and the parent
1073 * device, not this port device, should be the holder of the
1074 * hw_counters
1075 */
1076 if (device->alloc_hw_stats && port_num)
1077 setup_hw_stats(device, p, port_num);
1078
1079 list_add_tail(&p->kobj.entry, &device->port_list);
1080
1081 kobject_uevent(&p->kobj, KOBJ_ADD);
1082 return 0;
1083
1084 err_remove_pkey:
1085 sysfs_remove_group(&p->kobj, &p->pkey_group);
1086
1087 err_free_pkey:
1088 for (i = 0; i < attr.pkey_tbl_len; ++i)
1089 kfree(p->pkey_group.attrs[i]);
1090
1091 kfree(p->pkey_group.attrs);
1092 p->pkey_group.attrs = NULL;
1093
1094 err_remove_gid_type:
1095 sysfs_remove_group(&p->gid_attr_group->kobj,
1096 &p->gid_attr_group->type);
1097
1098 err_free_gid_type:
1099 for (i = 0; i < attr.gid_tbl_len; ++i)
1100 kfree(p->gid_attr_group->type.attrs[i]);
1101
1102 kfree(p->gid_attr_group->type.attrs);
1103 p->gid_attr_group->type.attrs = NULL;
1104
1105 err_remove_gid_ndev:
1106 sysfs_remove_group(&p->gid_attr_group->kobj,
1107 &p->gid_attr_group->ndev);
1108
1109 err_free_gid_ndev:
1110 for (i = 0; i < attr.gid_tbl_len; ++i)
1111 kfree(p->gid_attr_group->ndev.attrs[i]);
1112
1113 kfree(p->gid_attr_group->ndev.attrs);
1114 p->gid_attr_group->ndev.attrs = NULL;
1115
1116 err_remove_gid:
1117 sysfs_remove_group(&p->kobj, &p->gid_group);
1118
1119 err_free_gid:
1120 for (i = 0; i < attr.gid_tbl_len; ++i)
1121 kfree(p->gid_group.attrs[i]);
1122
1123 kfree(p->gid_group.attrs);
1124 p->gid_group.attrs = NULL;
1125
1126 err_remove_pma:
1127 sysfs_remove_group(&p->kobj, p->pma_table);
1128
1129 err_put_gid_attrs:
1130 kobject_put(&p->gid_attr_group->kobj);
1131
1132 err_put:
1133 kobject_put(&p->kobj);
1134 return ret;
1135 }
1136
1137 static ssize_t show_node_type(struct device *device,
1138 struct device_attribute *attr, char *buf)
1139 {
1140 struct ib_device *dev = container_of(device, struct ib_device, dev);
1141
1142 switch (dev->node_type) {
1143 case RDMA_NODE_IB_CA: return sprintf(buf, "%d: CA\n", dev->node_type);
1144 case RDMA_NODE_RNIC: return sprintf(buf, "%d: RNIC\n", dev->node_type);
1145 case RDMA_NODE_USNIC: return sprintf(buf, "%d: usNIC\n", dev->node_type);
1146 case RDMA_NODE_USNIC_UDP: return sprintf(buf, "%d: usNIC UDP\n", dev->node_type);
1147 case RDMA_NODE_IB_SWITCH: return sprintf(buf, "%d: switch\n", dev->node_type);
1148 case RDMA_NODE_IB_ROUTER: return sprintf(buf, "%d: router\n", dev->node_type);
1149 default: return sprintf(buf, "%d: <unknown>\n", dev->node_type);
1150 }
1151 }
1152
1153 static ssize_t show_sys_image_guid(struct device *device,
1154 struct device_attribute *dev_attr, char *buf)
1155 {
1156 struct ib_device *dev = container_of(device, struct ib_device, dev);
1157
1158 return sprintf(buf, "%04x:%04x:%04x:%04x\n",
1159 be16_to_cpu(((__be16 *) &dev->attrs.sys_image_guid)[0]),
1160 be16_to_cpu(((__be16 *) &dev->attrs.sys_image_guid)[1]),
1161 be16_to_cpu(((__be16 *) &dev->attrs.sys_image_guid)[2]),
1162 be16_to_cpu(((__be16 *) &dev->attrs.sys_image_guid)[3]));
1163 }
1164
1165 static ssize_t show_node_guid(struct device *device,
1166 struct device_attribute *attr, char *buf)
1167 {
1168 struct ib_device *dev = container_of(device, struct ib_device, dev);
1169
1170 return sprintf(buf, "%04x:%04x:%04x:%04x\n",
1171 be16_to_cpu(((__be16 *) &dev->node_guid)[0]),
1172 be16_to_cpu(((__be16 *) &dev->node_guid)[1]),
1173 be16_to_cpu(((__be16 *) &dev->node_guid)[2]),
1174 be16_to_cpu(((__be16 *) &dev->node_guid)[3]));
1175 }
1176
1177 static ssize_t show_node_desc(struct device *device,
1178 struct device_attribute *attr, char *buf)
1179 {
1180 struct ib_device *dev = container_of(device, struct ib_device, dev);
1181
1182 return sprintf(buf, "%.64s\n", dev->node_desc);
1183 }
1184
1185 static ssize_t set_node_desc(struct device *device,
1186 struct device_attribute *attr,
1187 const char *buf, size_t count)
1188 {
1189 struct ib_device *dev = container_of(device, struct ib_device, dev);
1190 struct ib_device_modify desc = {};
1191 int ret;
1192
1193 if (!dev->modify_device)
1194 return -EIO;
1195
1196 memcpy(desc.node_desc, buf, min_t(int, count, 64));
1197 ret = ib_modify_device(dev, IB_DEVICE_MODIFY_NODE_DESC, &desc);
1198 if (ret)
1199 return ret;
1200
1201 return count;
1202 }
1203
1204 static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr,
1205 char *buf)
1206 {
1207 struct ib_device *dev = container_of(device, struct ib_device, dev);
1208
1209 ib_get_device_fw_str(dev, buf, PAGE_SIZE);
1210 strlcat(buf, "\n", PAGE_SIZE);
1211 return strlen(buf);
1212 }
1213
1214 static DEVICE_ATTR(node_type, S_IRUGO, show_node_type, NULL);
1215 static DEVICE_ATTR(sys_image_guid, S_IRUGO, show_sys_image_guid, NULL);
1216 static DEVICE_ATTR(node_guid, S_IRUGO, show_node_guid, NULL);
1217 static DEVICE_ATTR(node_desc, S_IRUGO | S_IWUSR, show_node_desc, set_node_desc);
1218 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
1219
1220 static struct device_attribute *ib_class_attributes[] = {
1221 &dev_attr_node_type,
1222 &dev_attr_sys_image_guid,
1223 &dev_attr_node_guid,
1224 &dev_attr_node_desc,
1225 &dev_attr_fw_ver,
1226 };
1227
1228 static void free_port_list_attributes(struct ib_device *device)
1229 {
1230 struct kobject *p, *t;
1231
1232 list_for_each_entry_safe(p, t, &device->port_list, entry) {
1233 struct ib_port *port = container_of(p, struct ib_port, kobj);
1234 list_del(&p->entry);
1235 if (port->hw_stats) {
1236 kfree(port->hw_stats);
1237 free_hsag(&port->kobj, port->hw_stats_ag);
1238 }
1239 sysfs_remove_group(p, port->pma_table);
1240 sysfs_remove_group(p, &port->pkey_group);
1241 sysfs_remove_group(p, &port->gid_group);
1242 sysfs_remove_group(&port->gid_attr_group->kobj,
1243 &port->gid_attr_group->ndev);
1244 sysfs_remove_group(&port->gid_attr_group->kobj,
1245 &port->gid_attr_group->type);
1246 kobject_put(&port->gid_attr_group->kobj);
1247 kobject_put(p);
1248 }
1249
1250 kobject_put(device->ports_parent);
1251 }
1252
1253 int ib_device_register_sysfs(struct ib_device *device,
1254 int (*port_callback)(struct ib_device *,
1255 u8, struct kobject *))
1256 {
1257 struct device *class_dev = &device->dev;
1258 int ret;
1259 int i;
1260
1261 device->dev.parent = device->dma_device;
1262 ret = dev_set_name(class_dev, "%s", device->name);
1263 if (ret)
1264 return ret;
1265
1266 ret = device_add(class_dev);
1267 if (ret)
1268 goto err;
1269
1270 for (i = 0; i < ARRAY_SIZE(ib_class_attributes); ++i) {
1271 ret = device_create_file(class_dev, ib_class_attributes[i]);
1272 if (ret)
1273 goto err_unregister;
1274 }
1275
1276 device->ports_parent = kobject_create_and_add("ports",
1277 &class_dev->kobj);
1278 if (!device->ports_parent) {
1279 ret = -ENOMEM;
1280 goto err_put;
1281 }
1282
1283 if (rdma_cap_ib_switch(device)) {
1284 ret = add_port(device, 0, port_callback);
1285 if (ret)
1286 goto err_put;
1287 } else {
1288 for (i = 1; i <= device->phys_port_cnt; ++i) {
1289 ret = add_port(device, i, port_callback);
1290 if (ret)
1291 goto err_put;
1292 }
1293 }
1294
1295 if (device->alloc_hw_stats)
1296 setup_hw_stats(device, NULL, 0);
1297
1298 return 0;
1299
1300 err_put:
1301 free_port_list_attributes(device);
1302
1303 err_unregister:
1304 device_unregister(class_dev);
1305
1306 err:
1307 return ret;
1308 }
1309
1310 void ib_device_unregister_sysfs(struct ib_device *device)
1311 {
1312 int i;
1313
1314 /* Hold kobject until ib_dealloc_device() */
1315 kobject_get(&device->dev.kobj);
1316
1317 free_port_list_attributes(device);
1318
1319 if (device->hw_stats) {
1320 kfree(device->hw_stats);
1321 free_hsag(&device->dev.kobj, device->hw_stats_ag);
1322 }
1323
1324 for (i = 0; i < ARRAY_SIZE(ib_class_attributes); ++i)
1325 device_remove_file(&device->dev, ib_class_attributes[i]);
1326
1327 device_unregister(&device->dev);
1328 }
Linux kernel - Deliverables
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