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 
41 #include <rdma/ib_mad.h>
42 
43 struct ib_port {
44 	struct kobject         kobj;
45 	struct ib_device      *ibdev;
46 	struct attribute_group gid_group;
47 	struct attribute_group pkey_group;
48 	u8                     port_num;
49 };
50 
51 struct port_attribute {
52 	struct attribute attr;
53 	ssize_t (*show)(struct ib_port *, struct port_attribute *, char *buf);
54 	ssize_t (*store)(struct ib_port *, struct port_attribute *,
55 			 const char *buf, size_t count);
56 };
57 
58 #define PORT_ATTR(_name, _mode, _show, _store) \
59 struct port_attribute port_attr_##_name = __ATTR(_name, _mode, _show, _store)
60 
61 #define PORT_ATTR_RO(_name) \
62 struct port_attribute port_attr_##_name = __ATTR_RO(_name)
63 
64 struct port_table_attribute {
65 	struct port_attribute	attr;
66 	char			name[8];
67 	int			index;
68 };
69 
port_attr_show(struct kobject * kobj,struct attribute * attr,char * buf)70 static ssize_t port_attr_show(struct kobject *kobj,
71 			      struct attribute *attr, char *buf)
72 {
73 	struct port_attribute *port_attr =
74 		container_of(attr, struct port_attribute, attr);
75 	struct ib_port *p = container_of(kobj, struct ib_port, kobj);
76 
77 	if (!port_attr->show)
78 		return -EIO;
79 
80 	return port_attr->show(p, port_attr, buf);
81 }
82 
83 static const struct sysfs_ops port_sysfs_ops = {
84 	.show = port_attr_show
85 };
86 
state_show(struct ib_port * p,struct port_attribute * unused,char * buf)87 static ssize_t state_show(struct ib_port *p, struct port_attribute *unused,
88 			  char *buf)
89 {
90 	struct ib_port_attr attr;
91 	ssize_t ret;
92 
93 	static const char *state_name[] = {
94 		[IB_PORT_NOP]		= "NOP",
95 		[IB_PORT_DOWN]		= "DOWN",
96 		[IB_PORT_INIT]		= "INIT",
97 		[IB_PORT_ARMED]		= "ARMED",
98 		[IB_PORT_ACTIVE]	= "ACTIVE",
99 		[IB_PORT_ACTIVE_DEFER]	= "ACTIVE_DEFER"
100 	};
101 
102 	ret = ib_query_port(p->ibdev, p->port_num, &attr);
103 	if (ret)
104 		return ret;
105 
106 	return sprintf(buf, "%d: %s\n", attr.state,
107 		       attr.state >= 0 && attr.state < ARRAY_SIZE(state_name) ?
108 		       state_name[attr.state] : "UNKNOWN");
109 }
110 
lid_show(struct ib_port * p,struct port_attribute * unused,char * buf)111 static ssize_t lid_show(struct ib_port *p, struct port_attribute *unused,
112 			char *buf)
113 {
114 	struct ib_port_attr attr;
115 	ssize_t ret;
116 
117 	ret = ib_query_port(p->ibdev, p->port_num, &attr);
118 	if (ret)
119 		return ret;
120 
121 	return sprintf(buf, "0x%x\n", attr.lid);
122 }
123 
lid_mask_count_show(struct ib_port * p,struct port_attribute * unused,char * buf)124 static ssize_t lid_mask_count_show(struct ib_port *p,
125 				   struct port_attribute *unused,
126 				   char *buf)
127 {
128 	struct ib_port_attr attr;
129 	ssize_t ret;
130 
131 	ret = ib_query_port(p->ibdev, p->port_num, &attr);
132 	if (ret)
133 		return ret;
134 
135 	return sprintf(buf, "%d\n", attr.lmc);
136 }
137 
sm_lid_show(struct ib_port * p,struct port_attribute * unused,char * buf)138 static ssize_t sm_lid_show(struct ib_port *p, struct port_attribute *unused,
139 			   char *buf)
140 {
141 	struct ib_port_attr attr;
142 	ssize_t ret;
143 
144 	ret = ib_query_port(p->ibdev, p->port_num, &attr);
145 	if (ret)
146 		return ret;
147 
148 	return sprintf(buf, "0x%x\n", attr.sm_lid);
149 }
150 
sm_sl_show(struct ib_port * p,struct port_attribute * unused,char * buf)151 static ssize_t sm_sl_show(struct ib_port *p, struct port_attribute *unused,
152 			  char *buf)
153 {
154 	struct ib_port_attr attr;
155 	ssize_t ret;
156 
157 	ret = ib_query_port(p->ibdev, p->port_num, &attr);
158 	if (ret)
159 		return ret;
160 
161 	return sprintf(buf, "%d\n", attr.sm_sl);
162 }
163 
cap_mask_show(struct ib_port * p,struct port_attribute * unused,char * buf)164 static ssize_t cap_mask_show(struct ib_port *p, struct port_attribute *unused,
165 			     char *buf)
166 {
167 	struct ib_port_attr attr;
168 	ssize_t ret;
169 
170 	ret = ib_query_port(p->ibdev, p->port_num, &attr);
171 	if (ret)
172 		return ret;
173 
174 	return sprintf(buf, "0x%08x\n", attr.port_cap_flags);
175 }
176 
rate_show(struct ib_port * p,struct port_attribute * unused,char * buf)177 static ssize_t rate_show(struct ib_port *p, struct port_attribute *unused,
178 			 char *buf)
179 {
180 	struct ib_port_attr attr;
181 	char *speed = "";
182 	int rate;		/* in deci-Gb/sec */
183 	ssize_t ret;
184 
185 	ret = ib_query_port(p->ibdev, p->port_num, &attr);
186 	if (ret)
187 		return ret;
188 
189 	switch (attr.active_speed) {
190 	case IB_SPEED_DDR:
191 		speed = " DDR";
192 		rate = 50;
193 		break;
194 	case IB_SPEED_QDR:
195 		speed = " QDR";
196 		rate = 100;
197 		break;
198 	case IB_SPEED_FDR10:
199 		speed = " FDR10";
200 		rate = 100;
201 		break;
202 	case IB_SPEED_FDR:
203 		speed = " FDR";
204 		rate = 140;
205 		break;
206 	case IB_SPEED_EDR:
207 		speed = " EDR";
208 		rate = 250;
209 		break;
210 	case IB_SPEED_SDR:
211 	default:		/* default to SDR for invalid rates */
212 		rate = 25;
213 		break;
214 	}
215 
216 	rate *= ib_width_enum_to_int(attr.active_width);
217 	if (rate < 0)
218 		return -EINVAL;
219 
220 	return sprintf(buf, "%d%s Gb/sec (%dX%s)\n",
221 		       rate / 10, rate % 10 ? ".5" : "",
222 		       ib_width_enum_to_int(attr.active_width), speed);
223 }
224 
phys_state_show(struct ib_port * p,struct port_attribute * unused,char * buf)225 static ssize_t phys_state_show(struct ib_port *p, struct port_attribute *unused,
226 			       char *buf)
227 {
228 	struct ib_port_attr attr;
229 
230 	ssize_t ret;
231 
232 	ret = ib_query_port(p->ibdev, p->port_num, &attr);
233 	if (ret)
234 		return ret;
235 
236 	switch (attr.phys_state) {
237 	case 1:  return sprintf(buf, "1: Sleep\n");
238 	case 2:  return sprintf(buf, "2: Polling\n");
239 	case 3:  return sprintf(buf, "3: Disabled\n");
240 	case 4:  return sprintf(buf, "4: PortConfigurationTraining\n");
241 	case 5:  return sprintf(buf, "5: LinkUp\n");
242 	case 6:  return sprintf(buf, "6: LinkErrorRecovery\n");
243 	case 7:  return sprintf(buf, "7: Phy Test\n");
244 	default: return sprintf(buf, "%d: <unknown>\n", attr.phys_state);
245 	}
246 }
247 
link_layer_show(struct ib_port * p,struct port_attribute * unused,char * buf)248 static ssize_t link_layer_show(struct ib_port *p, struct port_attribute *unused,
249 			       char *buf)
250 {
251 	switch (rdma_port_get_link_layer(p->ibdev, p->port_num)) {
252 	case IB_LINK_LAYER_INFINIBAND:
253 		return sprintf(buf, "%s\n", "InfiniBand");
254 	case IB_LINK_LAYER_ETHERNET:
255 		return sprintf(buf, "%s\n", "Ethernet");
256 	default:
257 		return sprintf(buf, "%s\n", "Unknown");
258 	}
259 }
260 
261 static PORT_ATTR_RO(state);
262 static PORT_ATTR_RO(lid);
263 static PORT_ATTR_RO(lid_mask_count);
264 static PORT_ATTR_RO(sm_lid);
265 static PORT_ATTR_RO(sm_sl);
266 static PORT_ATTR_RO(cap_mask);
267 static PORT_ATTR_RO(rate);
268 static PORT_ATTR_RO(phys_state);
269 static PORT_ATTR_RO(link_layer);
270 
271 static struct attribute *port_default_attrs[] = {
272 	&port_attr_state.attr,
273 	&port_attr_lid.attr,
274 	&port_attr_lid_mask_count.attr,
275 	&port_attr_sm_lid.attr,
276 	&port_attr_sm_sl.attr,
277 	&port_attr_cap_mask.attr,
278 	&port_attr_rate.attr,
279 	&port_attr_phys_state.attr,
280 	&port_attr_link_layer.attr,
281 	NULL
282 };
283 
show_port_gid(struct ib_port * p,struct port_attribute * attr,char * buf)284 static ssize_t show_port_gid(struct ib_port *p, struct port_attribute *attr,
285 			     char *buf)
286 {
287 	struct port_table_attribute *tab_attr =
288 		container_of(attr, struct port_table_attribute, attr);
289 	union ib_gid gid;
290 	ssize_t ret;
291 
292 	ret = ib_query_gid(p->ibdev, p->port_num, tab_attr->index, &gid);
293 	if (ret)
294 		return ret;
295 
296 	return sprintf(buf, "%pI6\n", gid.raw);
297 }
298 
show_port_pkey(struct ib_port * p,struct port_attribute * attr,char * buf)299 static ssize_t show_port_pkey(struct ib_port *p, struct port_attribute *attr,
300 			      char *buf)
301 {
302 	struct port_table_attribute *tab_attr =
303 		container_of(attr, struct port_table_attribute, attr);
304 	u16 pkey;
305 	ssize_t ret;
306 
307 	ret = ib_query_pkey(p->ibdev, p->port_num, tab_attr->index, &pkey);
308 	if (ret)
309 		return ret;
310 
311 	return sprintf(buf, "0x%04x\n", pkey);
312 }
313 
314 #define PORT_PMA_ATTR(_name, _counter, _width, _offset)			\
315 struct port_table_attribute port_pma_attr_##_name = {			\
316 	.attr  = __ATTR(_name, S_IRUGO, show_pma_counter, NULL),	\
317 	.index = (_offset) | ((_width) << 16) | ((_counter) << 24)	\
318 }
319 
show_pma_counter(struct ib_port * p,struct port_attribute * attr,char * buf)320 static ssize_t show_pma_counter(struct ib_port *p, struct port_attribute *attr,
321 				char *buf)
322 {
323 	struct port_table_attribute *tab_attr =
324 		container_of(attr, struct port_table_attribute, attr);
325 	int offset = tab_attr->index & 0xffff;
326 	int width  = (tab_attr->index >> 16) & 0xff;
327 	struct ib_mad *in_mad  = NULL;
328 	struct ib_mad *out_mad = NULL;
329 	ssize_t ret;
330 
331 	if (!p->ibdev->process_mad)
332 		return sprintf(buf, "N/A (no PMA)\n");
333 
334 	in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
335 	out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
336 	if (!in_mad || !out_mad) {
337 		ret = -ENOMEM;
338 		goto out;
339 	}
340 
341 	in_mad->mad_hdr.base_version  = 1;
342 	in_mad->mad_hdr.mgmt_class    = IB_MGMT_CLASS_PERF_MGMT;
343 	in_mad->mad_hdr.class_version = 1;
344 	in_mad->mad_hdr.method        = IB_MGMT_METHOD_GET;
345 	in_mad->mad_hdr.attr_id       = cpu_to_be16(0x12); /* PortCounters */
346 
347 	in_mad->data[41] = p->port_num;	/* PortSelect field */
348 
349 	if ((p->ibdev->process_mad(p->ibdev, IB_MAD_IGNORE_MKEY,
350 		 p->port_num, NULL, NULL, in_mad, out_mad) &
351 	     (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) !=
352 	    (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) {
353 		ret = -EINVAL;
354 		goto out;
355 	}
356 
357 	switch (width) {
358 	case 4:
359 		ret = sprintf(buf, "%u\n", (out_mad->data[40 + offset / 8] >>
360 					    (4 - (offset % 8))) & 0xf);
361 		break;
362 	case 8:
363 		ret = sprintf(buf, "%u\n", out_mad->data[40 + offset / 8]);
364 		break;
365 	case 16:
366 		ret = sprintf(buf, "%u\n",
367 			      be16_to_cpup((__be16 *)(out_mad->data + 40 + offset / 8)));
368 		break;
369 	case 32:
370 		ret = sprintf(buf, "%u\n",
371 			      be32_to_cpup((__be32 *)(out_mad->data + 40 + offset / 8)));
372 		break;
373 	default:
374 		ret = 0;
375 	}
376 
377 out:
378 	kfree(in_mad);
379 	kfree(out_mad);
380 
381 	return ret;
382 }
383 
384 static PORT_PMA_ATTR(symbol_error		    ,  0, 16,  32);
385 static PORT_PMA_ATTR(link_error_recovery	    ,  1,  8,  48);
386 static PORT_PMA_ATTR(link_downed		    ,  2,  8,  56);
387 static PORT_PMA_ATTR(port_rcv_errors		    ,  3, 16,  64);
388 static PORT_PMA_ATTR(port_rcv_remote_physical_errors,  4, 16,  80);
389 static PORT_PMA_ATTR(port_rcv_switch_relay_errors   ,  5, 16,  96);
390 static PORT_PMA_ATTR(port_xmit_discards		    ,  6, 16, 112);
391 static PORT_PMA_ATTR(port_xmit_constraint_errors    ,  7,  8, 128);
392 static PORT_PMA_ATTR(port_rcv_constraint_errors	    ,  8,  8, 136);
393 static PORT_PMA_ATTR(local_link_integrity_errors    ,  9,  4, 152);
394 static PORT_PMA_ATTR(excessive_buffer_overrun_errors, 10,  4, 156);
395 static PORT_PMA_ATTR(VL15_dropped		    , 11, 16, 176);
396 static PORT_PMA_ATTR(port_xmit_data		    , 12, 32, 192);
397 static PORT_PMA_ATTR(port_rcv_data		    , 13, 32, 224);
398 static PORT_PMA_ATTR(port_xmit_packets		    , 14, 32, 256);
399 static PORT_PMA_ATTR(port_rcv_packets		    , 15, 32, 288);
400 
401 static struct attribute *pma_attrs[] = {
402 	&port_pma_attr_symbol_error.attr.attr,
403 	&port_pma_attr_link_error_recovery.attr.attr,
404 	&port_pma_attr_link_downed.attr.attr,
405 	&port_pma_attr_port_rcv_errors.attr.attr,
406 	&port_pma_attr_port_rcv_remote_physical_errors.attr.attr,
407 	&port_pma_attr_port_rcv_switch_relay_errors.attr.attr,
408 	&port_pma_attr_port_xmit_discards.attr.attr,
409 	&port_pma_attr_port_xmit_constraint_errors.attr.attr,
410 	&port_pma_attr_port_rcv_constraint_errors.attr.attr,
411 	&port_pma_attr_local_link_integrity_errors.attr.attr,
412 	&port_pma_attr_excessive_buffer_overrun_errors.attr.attr,
413 	&port_pma_attr_VL15_dropped.attr.attr,
414 	&port_pma_attr_port_xmit_data.attr.attr,
415 	&port_pma_attr_port_rcv_data.attr.attr,
416 	&port_pma_attr_port_xmit_packets.attr.attr,
417 	&port_pma_attr_port_rcv_packets.attr.attr,
418 	NULL
419 };
420 
421 static struct attribute_group pma_group = {
422 	.name  = "counters",
423 	.attrs  = pma_attrs
424 };
425 
ib_port_release(struct kobject * kobj)426 static void ib_port_release(struct kobject *kobj)
427 {
428 	struct ib_port *p = container_of(kobj, struct ib_port, kobj);
429 	struct attribute *a;
430 	int i;
431 
432 	for (i = 0; (a = p->gid_group.attrs[i]); ++i)
433 		kfree(a);
434 
435 	kfree(p->gid_group.attrs);
436 
437 	for (i = 0; (a = p->pkey_group.attrs[i]); ++i)
438 		kfree(a);
439 
440 	kfree(p->pkey_group.attrs);
441 
442 	kfree(p);
443 }
444 
445 static struct kobj_type port_type = {
446 	.release       = ib_port_release,
447 	.sysfs_ops     = &port_sysfs_ops,
448 	.default_attrs = port_default_attrs
449 };
450 
ib_device_release(struct device * device)451 static void ib_device_release(struct device *device)
452 {
453 	struct ib_device *dev = container_of(device, struct ib_device, dev);
454 
455 	kfree(dev);
456 }
457 
ib_device_uevent(struct device * device,struct kobj_uevent_env * env)458 static int ib_device_uevent(struct device *device,
459 			    struct kobj_uevent_env *env)
460 {
461 	struct ib_device *dev = container_of(device, struct ib_device, dev);
462 
463 	if (add_uevent_var(env, "NAME=%s", dev->name))
464 		return -ENOMEM;
465 
466 	/*
467 	 * It would be nice to pass the node GUID with the event...
468 	 */
469 
470 	return 0;
471 }
472 
473 static struct attribute **
alloc_group_attrs(ssize_t (* show)(struct ib_port *,struct port_attribute *,char * buf),int len)474 alloc_group_attrs(ssize_t (*show)(struct ib_port *,
475 				  struct port_attribute *, char *buf),
476 		  int len)
477 {
478 	struct attribute **tab_attr;
479 	struct port_table_attribute *element;
480 	int i;
481 
482 	tab_attr = kcalloc(1 + len, sizeof(struct attribute *), GFP_KERNEL);
483 	if (!tab_attr)
484 		return NULL;
485 
486 	for (i = 0; i < len; i++) {
487 		element = kzalloc(sizeof(struct port_table_attribute),
488 				  GFP_KERNEL);
489 		if (!element)
490 			goto err;
491 
492 		if (snprintf(element->name, sizeof(element->name),
493 			     "%d", i) >= sizeof(element->name)) {
494 			kfree(element);
495 			goto err;
496 		}
497 
498 		element->attr.attr.name  = element->name;
499 		element->attr.attr.mode  = S_IRUGO;
500 		element->attr.show       = show;
501 		element->index		 = i;
502 		sysfs_attr_init(&element->attr.attr);
503 
504 		tab_attr[i] = &element->attr.attr;
505 	}
506 
507 	return tab_attr;
508 
509 err:
510 	while (--i >= 0)
511 		kfree(tab_attr[i]);
512 	kfree(tab_attr);
513 	return NULL;
514 }
515 
add_port(struct ib_device * device,int port_num,int (* port_callback)(struct ib_device *,u8,struct kobject *))516 static int add_port(struct ib_device *device, int port_num,
517 		    int (*port_callback)(struct ib_device *,
518 					 u8, struct kobject *))
519 {
520 	struct ib_port *p;
521 	struct ib_port_attr attr;
522 	int i;
523 	int ret;
524 
525 	ret = ib_query_port(device, port_num, &attr);
526 	if (ret)
527 		return ret;
528 
529 	p = kzalloc(sizeof *p, GFP_KERNEL);
530 	if (!p)
531 		return -ENOMEM;
532 
533 	p->ibdev      = device;
534 	p->port_num   = port_num;
535 
536 	ret = kobject_init_and_add(&p->kobj, &port_type,
537 				   kobject_get(device->ports_parent),
538 				   "%d", port_num);
539 	if (ret)
540 		goto err_put;
541 
542 	ret = sysfs_create_group(&p->kobj, &pma_group);
543 	if (ret)
544 		goto err_put;
545 
546 	p->gid_group.name  = "gids";
547 	p->gid_group.attrs = alloc_group_attrs(show_port_gid, attr.gid_tbl_len);
548 	if (!p->gid_group.attrs)
549 		goto err_remove_pma;
550 
551 	ret = sysfs_create_group(&p->kobj, &p->gid_group);
552 	if (ret)
553 		goto err_free_gid;
554 
555 	p->pkey_group.name  = "pkeys";
556 	p->pkey_group.attrs = alloc_group_attrs(show_port_pkey,
557 						attr.pkey_tbl_len);
558 	if (!p->pkey_group.attrs)
559 		goto err_remove_gid;
560 
561 	ret = sysfs_create_group(&p->kobj, &p->pkey_group);
562 	if (ret)
563 		goto err_free_pkey;
564 
565 	if (port_callback) {
566 		ret = port_callback(device, port_num, &p->kobj);
567 		if (ret)
568 			goto err_remove_pkey;
569 	}
570 
571 	list_add_tail(&p->kobj.entry, &device->port_list);
572 
573 	kobject_uevent(&p->kobj, KOBJ_ADD);
574 	return 0;
575 
576 err_remove_pkey:
577 	sysfs_remove_group(&p->kobj, &p->pkey_group);
578 
579 err_free_pkey:
580 	for (i = 0; i < attr.pkey_tbl_len; ++i)
581 		kfree(p->pkey_group.attrs[i]);
582 
583 	kfree(p->pkey_group.attrs);
584 
585 err_remove_gid:
586 	sysfs_remove_group(&p->kobj, &p->gid_group);
587 
588 err_free_gid:
589 	for (i = 0; i < attr.gid_tbl_len; ++i)
590 		kfree(p->gid_group.attrs[i]);
591 
592 	kfree(p->gid_group.attrs);
593 
594 err_remove_pma:
595 	sysfs_remove_group(&p->kobj, &pma_group);
596 
597 err_put:
598 	kobject_put(device->ports_parent);
599 	kfree(p);
600 	return ret;
601 }
602 
show_node_type(struct device * device,struct device_attribute * attr,char * buf)603 static ssize_t show_node_type(struct device *device,
604 			      struct device_attribute *attr, char *buf)
605 {
606 	struct ib_device *dev = container_of(device, struct ib_device, dev);
607 
608 	switch (dev->node_type) {
609 	case RDMA_NODE_IB_CA:	  return sprintf(buf, "%d: CA\n", dev->node_type);
610 	case RDMA_NODE_RNIC:	  return sprintf(buf, "%d: RNIC\n", dev->node_type);
611 	case RDMA_NODE_IB_SWITCH: return sprintf(buf, "%d: switch\n", dev->node_type);
612 	case RDMA_NODE_IB_ROUTER: return sprintf(buf, "%d: router\n", dev->node_type);
613 	default:		  return sprintf(buf, "%d: <unknown>\n", dev->node_type);
614 	}
615 }
616 
show_sys_image_guid(struct device * device,struct device_attribute * dev_attr,char * buf)617 static ssize_t show_sys_image_guid(struct device *device,
618 				   struct device_attribute *dev_attr, char *buf)
619 {
620 	struct ib_device *dev = container_of(device, struct ib_device, dev);
621 	struct ib_device_attr attr;
622 	ssize_t ret;
623 
624 	ret = ib_query_device(dev, &attr);
625 	if (ret)
626 		return ret;
627 
628 	return sprintf(buf, "%04x:%04x:%04x:%04x\n",
629 		       be16_to_cpu(((__be16 *) &attr.sys_image_guid)[0]),
630 		       be16_to_cpu(((__be16 *) &attr.sys_image_guid)[1]),
631 		       be16_to_cpu(((__be16 *) &attr.sys_image_guid)[2]),
632 		       be16_to_cpu(((__be16 *) &attr.sys_image_guid)[3]));
633 }
634 
show_node_guid(struct device * device,struct device_attribute * attr,char * buf)635 static ssize_t show_node_guid(struct device *device,
636 			      struct device_attribute *attr, char *buf)
637 {
638 	struct ib_device *dev = container_of(device, struct ib_device, dev);
639 
640 	return sprintf(buf, "%04x:%04x:%04x:%04x\n",
641 		       be16_to_cpu(((__be16 *) &dev->node_guid)[0]),
642 		       be16_to_cpu(((__be16 *) &dev->node_guid)[1]),
643 		       be16_to_cpu(((__be16 *) &dev->node_guid)[2]),
644 		       be16_to_cpu(((__be16 *) &dev->node_guid)[3]));
645 }
646 
show_node_desc(struct device * device,struct device_attribute * attr,char * buf)647 static ssize_t show_node_desc(struct device *device,
648 			      struct device_attribute *attr, char *buf)
649 {
650 	struct ib_device *dev = container_of(device, struct ib_device, dev);
651 
652 	return sprintf(buf, "%.64s\n", dev->node_desc);
653 }
654 
set_node_desc(struct device * device,struct device_attribute * attr,const char * buf,size_t count)655 static ssize_t set_node_desc(struct device *device,
656 			     struct device_attribute *attr,
657 			     const char *buf, size_t count)
658 {
659 	struct ib_device *dev = container_of(device, struct ib_device, dev);
660 	struct ib_device_modify desc = {};
661 	int ret;
662 
663 	if (!dev->modify_device)
664 		return -EIO;
665 
666 	memcpy(desc.node_desc, buf, min_t(int, count, 64));
667 	ret = ib_modify_device(dev, IB_DEVICE_MODIFY_NODE_DESC, &desc);
668 	if (ret)
669 		return ret;
670 
671 	return count;
672 }
673 
674 static DEVICE_ATTR(node_type, S_IRUGO, show_node_type, NULL);
675 static DEVICE_ATTR(sys_image_guid, S_IRUGO, show_sys_image_guid, NULL);
676 static DEVICE_ATTR(node_guid, S_IRUGO, show_node_guid, NULL);
677 static DEVICE_ATTR(node_desc, S_IRUGO | S_IWUSR, show_node_desc, set_node_desc);
678 
679 static struct device_attribute *ib_class_attributes[] = {
680 	&dev_attr_node_type,
681 	&dev_attr_sys_image_guid,
682 	&dev_attr_node_guid,
683 	&dev_attr_node_desc
684 };
685 
686 static struct class ib_class = {
687 	.name    = "infiniband",
688 	.dev_release = ib_device_release,
689 	.dev_uevent = ib_device_uevent,
690 };
691 
692 /* Show a given an attribute in the statistics group */
show_protocol_stat(const struct device * device,struct device_attribute * attr,char * buf,unsigned offset)693 static ssize_t show_protocol_stat(const struct device *device,
694 			    struct device_attribute *attr, char *buf,
695 			    unsigned offset)
696 {
697 	struct ib_device *dev = container_of(device, struct ib_device, dev);
698 	union rdma_protocol_stats stats;
699 	ssize_t ret;
700 
701 	ret = dev->get_protocol_stats(dev, &stats);
702 	if (ret)
703 		return ret;
704 
705 	return sprintf(buf, "%llu\n",
706 		       (unsigned long long) ((u64 *) &stats)[offset]);
707 }
708 
709 /* generate a read-only iwarp statistics attribute */
710 #define IW_STATS_ENTRY(name)						\
711 static ssize_t show_##name(struct device *device,			\
712 			   struct device_attribute *attr, char *buf)	\
713 {									\
714 	return show_protocol_stat(device, attr, buf,			\
715 				  offsetof(struct iw_protocol_stats, name) / \
716 				  sizeof (u64));			\
717 }									\
718 static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
719 
720 IW_STATS_ENTRY(ipInReceives);
721 IW_STATS_ENTRY(ipInHdrErrors);
722 IW_STATS_ENTRY(ipInTooBigErrors);
723 IW_STATS_ENTRY(ipInNoRoutes);
724 IW_STATS_ENTRY(ipInAddrErrors);
725 IW_STATS_ENTRY(ipInUnknownProtos);
726 IW_STATS_ENTRY(ipInTruncatedPkts);
727 IW_STATS_ENTRY(ipInDiscards);
728 IW_STATS_ENTRY(ipInDelivers);
729 IW_STATS_ENTRY(ipOutForwDatagrams);
730 IW_STATS_ENTRY(ipOutRequests);
731 IW_STATS_ENTRY(ipOutDiscards);
732 IW_STATS_ENTRY(ipOutNoRoutes);
733 IW_STATS_ENTRY(ipReasmTimeout);
734 IW_STATS_ENTRY(ipReasmReqds);
735 IW_STATS_ENTRY(ipReasmOKs);
736 IW_STATS_ENTRY(ipReasmFails);
737 IW_STATS_ENTRY(ipFragOKs);
738 IW_STATS_ENTRY(ipFragFails);
739 IW_STATS_ENTRY(ipFragCreates);
740 IW_STATS_ENTRY(ipInMcastPkts);
741 IW_STATS_ENTRY(ipOutMcastPkts);
742 IW_STATS_ENTRY(ipInBcastPkts);
743 IW_STATS_ENTRY(ipOutBcastPkts);
744 IW_STATS_ENTRY(tcpRtoAlgorithm);
745 IW_STATS_ENTRY(tcpRtoMin);
746 IW_STATS_ENTRY(tcpRtoMax);
747 IW_STATS_ENTRY(tcpMaxConn);
748 IW_STATS_ENTRY(tcpActiveOpens);
749 IW_STATS_ENTRY(tcpPassiveOpens);
750 IW_STATS_ENTRY(tcpAttemptFails);
751 IW_STATS_ENTRY(tcpEstabResets);
752 IW_STATS_ENTRY(tcpCurrEstab);
753 IW_STATS_ENTRY(tcpInSegs);
754 IW_STATS_ENTRY(tcpOutSegs);
755 IW_STATS_ENTRY(tcpRetransSegs);
756 IW_STATS_ENTRY(tcpInErrs);
757 IW_STATS_ENTRY(tcpOutRsts);
758 
759 static struct attribute *iw_proto_stats_attrs[] = {
760 	&dev_attr_ipInReceives.attr,
761 	&dev_attr_ipInHdrErrors.attr,
762 	&dev_attr_ipInTooBigErrors.attr,
763 	&dev_attr_ipInNoRoutes.attr,
764 	&dev_attr_ipInAddrErrors.attr,
765 	&dev_attr_ipInUnknownProtos.attr,
766 	&dev_attr_ipInTruncatedPkts.attr,
767 	&dev_attr_ipInDiscards.attr,
768 	&dev_attr_ipInDelivers.attr,
769 	&dev_attr_ipOutForwDatagrams.attr,
770 	&dev_attr_ipOutRequests.attr,
771 	&dev_attr_ipOutDiscards.attr,
772 	&dev_attr_ipOutNoRoutes.attr,
773 	&dev_attr_ipReasmTimeout.attr,
774 	&dev_attr_ipReasmReqds.attr,
775 	&dev_attr_ipReasmOKs.attr,
776 	&dev_attr_ipReasmFails.attr,
777 	&dev_attr_ipFragOKs.attr,
778 	&dev_attr_ipFragFails.attr,
779 	&dev_attr_ipFragCreates.attr,
780 	&dev_attr_ipInMcastPkts.attr,
781 	&dev_attr_ipOutMcastPkts.attr,
782 	&dev_attr_ipInBcastPkts.attr,
783 	&dev_attr_ipOutBcastPkts.attr,
784 	&dev_attr_tcpRtoAlgorithm.attr,
785 	&dev_attr_tcpRtoMin.attr,
786 	&dev_attr_tcpRtoMax.attr,
787 	&dev_attr_tcpMaxConn.attr,
788 	&dev_attr_tcpActiveOpens.attr,
789 	&dev_attr_tcpPassiveOpens.attr,
790 	&dev_attr_tcpAttemptFails.attr,
791 	&dev_attr_tcpEstabResets.attr,
792 	&dev_attr_tcpCurrEstab.attr,
793 	&dev_attr_tcpInSegs.attr,
794 	&dev_attr_tcpOutSegs.attr,
795 	&dev_attr_tcpRetransSegs.attr,
796 	&dev_attr_tcpInErrs.attr,
797 	&dev_attr_tcpOutRsts.attr,
798 	NULL
799 };
800 
801 static struct attribute_group iw_stats_group = {
802 	.name	= "proto_stats",
803 	.attrs	= iw_proto_stats_attrs,
804 };
805 
ib_device_register_sysfs(struct ib_device * device,int (* port_callback)(struct ib_device *,u8,struct kobject *))806 int ib_device_register_sysfs(struct ib_device *device,
807 			     int (*port_callback)(struct ib_device *,
808 						  u8, struct kobject *))
809 {
810 	struct device *class_dev = &device->dev;
811 	int ret;
812 	int i;
813 
814 	class_dev->class      = &ib_class;
815 	class_dev->parent     = device->dma_device;
816 	dev_set_name(class_dev, device->name);
817 	dev_set_drvdata(class_dev, device);
818 
819 	INIT_LIST_HEAD(&device->port_list);
820 
821 	ret = device_register(class_dev);
822 	if (ret)
823 		goto err;
824 
825 	for (i = 0; i < ARRAY_SIZE(ib_class_attributes); ++i) {
826 		ret = device_create_file(class_dev, ib_class_attributes[i]);
827 		if (ret)
828 			goto err_unregister;
829 	}
830 
831 	device->ports_parent = kobject_create_and_add("ports",
832 					kobject_get(&class_dev->kobj));
833 	if (!device->ports_parent) {
834 		ret = -ENOMEM;
835 		goto err_put;
836 	}
837 
838 	if (device->node_type == RDMA_NODE_IB_SWITCH) {
839 		ret = add_port(device, 0, port_callback);
840 		if (ret)
841 			goto err_put;
842 	} else {
843 		for (i = 1; i <= device->phys_port_cnt; ++i) {
844 			ret = add_port(device, i, port_callback);
845 			if (ret)
846 				goto err_put;
847 		}
848 	}
849 
850 	if (device->node_type == RDMA_NODE_RNIC && device->get_protocol_stats) {
851 		ret = sysfs_create_group(&class_dev->kobj, &iw_stats_group);
852 		if (ret)
853 			goto err_put;
854 	}
855 
856 	return 0;
857 
858 err_put:
859 	{
860 		struct kobject *p, *t;
861 		struct ib_port *port;
862 
863 		list_for_each_entry_safe(p, t, &device->port_list, entry) {
864 			list_del(&p->entry);
865 			port = container_of(p, struct ib_port, kobj);
866 			sysfs_remove_group(p, &pma_group);
867 			sysfs_remove_group(p, &port->pkey_group);
868 			sysfs_remove_group(p, &port->gid_group);
869 			kobject_put(p);
870 		}
871 	}
872 
873 	kobject_put(&class_dev->kobj);
874 
875 err_unregister:
876 	device_unregister(class_dev);
877 
878 err:
879 	return ret;
880 }
881 
ib_device_unregister_sysfs(struct ib_device * device)882 void ib_device_unregister_sysfs(struct ib_device *device)
883 {
884 	struct kobject *p, *t;
885 	struct ib_port *port;
886 
887 	/* Hold kobject until ib_dealloc_device() */
888 	kobject_get(&device->dev.kobj);
889 
890 	list_for_each_entry_safe(p, t, &device->port_list, entry) {
891 		list_del(&p->entry);
892 		port = container_of(p, struct ib_port, kobj);
893 		sysfs_remove_group(p, &pma_group);
894 		sysfs_remove_group(p, &port->pkey_group);
895 		sysfs_remove_group(p, &port->gid_group);
896 		kobject_put(p);
897 	}
898 
899 	kobject_put(device->ports_parent);
900 	device_unregister(&device->dev);
901 }
902 
ib_sysfs_setup(void)903 int ib_sysfs_setup(void)
904 {
905 	return class_register(&ib_class);
906 }
907 
ib_sysfs_cleanup(void)908 void ib_sysfs_cleanup(void)
909 {
910 	class_unregister(&ib_class);
911 }
912