1 // SPDX-License-Identifier: GPL-2.0
2 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
3 
4 #include <linux/delay.h>
5 #include <linux/etherdevice.h>
6 #include <linux/hardirq.h>
7 #include <linux/netdevice.h>
8 #include <linux/if_ether.h>
9 #include <linux/if_arp.h>
10 #include <linux/kthread.h>
11 #include <linux/kfifo.h>
12 #include <net/cfg80211.h>
13 
14 #include "mesh.h"
15 #include "decl.h"
16 #include "cmd.h"
17 
18 
19 static int lbs_add_mesh(struct lbs_private *priv);
20 
21 /***************************************************************************
22  * Mesh command handling
23  */
24 
25 static int lbs_mesh_access(struct lbs_private *priv, uint16_t cmd_action,
26 		    struct cmd_ds_mesh_access *cmd)
27 {
28 	int ret;
29 
30 	cmd->hdr.command = cpu_to_le16(CMD_MESH_ACCESS);
31 	cmd->hdr.size = cpu_to_le16(sizeof(*cmd));
32 	cmd->hdr.result = 0;
33 
34 	cmd->action = cpu_to_le16(cmd_action);
35 
36 	ret = lbs_cmd_with_response(priv, CMD_MESH_ACCESS, cmd);
37 
38 	return ret;
39 }
40 
41 static int __lbs_mesh_config_send(struct lbs_private *priv,
42 				  struct cmd_ds_mesh_config *cmd,
43 				  uint16_t action, uint16_t type)
44 {
45 	int ret;
46 	u16 command = CMD_MESH_CONFIG_OLD;
47 
48 	/*
49 	 * Command id is 0xac for v10 FW along with mesh interface
50 	 * id in bits 14-13-12.
51 	 */
52 	if (priv->mesh_tlv == TLV_TYPE_MESH_ID)
53 		command = CMD_MESH_CONFIG |
54 			  (MESH_IFACE_ID << MESH_IFACE_BIT_OFFSET);
55 
56 	cmd->hdr.command = cpu_to_le16(command);
57 	cmd->hdr.size = cpu_to_le16(sizeof(struct cmd_ds_mesh_config));
58 	cmd->hdr.result = 0;
59 
60 	cmd->type = cpu_to_le16(type);
61 	cmd->action = cpu_to_le16(action);
62 
63 	ret = lbs_cmd_with_response(priv, command, cmd);
64 
65 	return ret;
66 }
67 
68 static int lbs_mesh_config_send(struct lbs_private *priv,
69 			 struct cmd_ds_mesh_config *cmd,
70 			 uint16_t action, uint16_t type)
71 {
72 	int ret;
73 
74 	if (!(priv->fwcapinfo & FW_CAPINFO_PERSISTENT_CONFIG))
75 		return -EOPNOTSUPP;
76 
77 	ret = __lbs_mesh_config_send(priv, cmd, action, type);
78 	return ret;
79 }
80 
81 /* This function is the CMD_MESH_CONFIG legacy function.  It only handles the
82  * START and STOP actions.  The extended actions supported by CMD_MESH_CONFIG
83  * are all handled by preparing a struct cmd_ds_mesh_config and passing it to
84  * lbs_mesh_config_send.
85  */
86 static int lbs_mesh_config(struct lbs_private *priv, uint16_t action,
87 		uint16_t chan)
88 {
89 	struct wireless_dev *mesh_wdev;
90 	struct cmd_ds_mesh_config cmd;
91 	struct mrvl_meshie *ie;
92 
93 	memset(&cmd, 0, sizeof(cmd));
94 	cmd.channel = cpu_to_le16(chan);
95 	ie = (struct mrvl_meshie *)cmd.data;
96 
97 	switch (action) {
98 	case CMD_ACT_MESH_CONFIG_START:
99 		ie->id = WLAN_EID_VENDOR_SPECIFIC;
100 		ie->val.oui[0] = 0x00;
101 		ie->val.oui[1] = 0x50;
102 		ie->val.oui[2] = 0x43;
103 		ie->val.type = MARVELL_MESH_IE_TYPE;
104 		ie->val.subtype = MARVELL_MESH_IE_SUBTYPE;
105 		ie->val.version = MARVELL_MESH_IE_VERSION;
106 		ie->val.active_protocol_id = MARVELL_MESH_PROTO_ID_HWMP;
107 		ie->val.active_metric_id = MARVELL_MESH_METRIC_ID;
108 		ie->val.mesh_capability = MARVELL_MESH_CAPABILITY;
109 
110 		if (priv->mesh_dev) {
111 			mesh_wdev = priv->mesh_dev->ieee80211_ptr;
112 			ie->val.mesh_id_len = mesh_wdev->mesh_id_up_len;
113 			memcpy(ie->val.mesh_id, mesh_wdev->ssid,
114 						mesh_wdev->mesh_id_up_len);
115 		}
116 
117 		ie->len = sizeof(struct mrvl_meshie_val) -
118 			IEEE80211_MAX_SSID_LEN + ie->val.mesh_id_len;
119 
120 		cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie_val));
121 		break;
122 	case CMD_ACT_MESH_CONFIG_STOP:
123 		break;
124 	default:
125 		return -1;
126 	}
127 	lbs_deb_cmd("mesh config action %d type %x channel %d SSID %*pE\n",
128 		    action, priv->mesh_tlv, chan, ie->val.mesh_id_len,
129 		    ie->val.mesh_id);
130 
131 	return __lbs_mesh_config_send(priv, &cmd, action, priv->mesh_tlv);
132 }
133 
134 int lbs_mesh_set_channel(struct lbs_private *priv, u8 channel)
135 {
136 	priv->mesh_channel = channel;
137 	return lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, channel);
138 }
139 
140 static uint16_t lbs_mesh_get_channel(struct lbs_private *priv)
141 {
142 	return priv->mesh_channel ?: 1;
143 }
144 
145 /***************************************************************************
146  * Mesh sysfs support
147  */
148 
149 /*
150  * Attributes exported through sysfs
151  */
152 
153 /**
154  * lbs_anycast_get - Get function for sysfs attribute anycast_mask
155  * @dev: the &struct device
156  * @attr: device attributes
157  * @buf: buffer where data will be returned
158  */
159 static ssize_t lbs_anycast_get(struct device *dev,
160 		struct device_attribute *attr, char * buf)
161 {
162 	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
163 	struct cmd_ds_mesh_access mesh_access;
164 	int ret;
165 
166 	memset(&mesh_access, 0, sizeof(mesh_access));
167 
168 	ret = lbs_mesh_access(priv, CMD_ACT_MESH_GET_ANYCAST, &mesh_access);
169 	if (ret)
170 		return ret;
171 
172 	return snprintf(buf, 12, "0x%X\n", le32_to_cpu(mesh_access.data[0]));
173 }
174 
175 /**
176  * lbs_anycast_set - Set function for sysfs attribute anycast_mask
177  * @dev: the &struct device
178  * @attr: device attributes
179  * @buf: buffer that contains new attribute value
180  * @count: size of buffer
181  */
182 static ssize_t lbs_anycast_set(struct device *dev,
183 		struct device_attribute *attr, const char * buf, size_t count)
184 {
185 	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
186 	struct cmd_ds_mesh_access mesh_access;
187 	uint32_t datum;
188 	int ret;
189 
190 	memset(&mesh_access, 0, sizeof(mesh_access));
191 	sscanf(buf, "%x", &datum);
192 	mesh_access.data[0] = cpu_to_le32(datum);
193 
194 	ret = lbs_mesh_access(priv, CMD_ACT_MESH_SET_ANYCAST, &mesh_access);
195 	if (ret)
196 		return ret;
197 
198 	return strlen(buf);
199 }
200 
201 /**
202  * lbs_prb_rsp_limit_get - Get function for sysfs attribute prb_rsp_limit
203  * @dev: the &struct device
204  * @attr: device attributes
205  * @buf: buffer where data will be returned
206  */
207 static ssize_t lbs_prb_rsp_limit_get(struct device *dev,
208 		struct device_attribute *attr, char *buf)
209 {
210 	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
211 	struct cmd_ds_mesh_access mesh_access;
212 	int ret;
213 	u32 retry_limit;
214 
215 	memset(&mesh_access, 0, sizeof(mesh_access));
216 	mesh_access.data[0] = cpu_to_le32(CMD_ACT_GET);
217 
218 	ret = lbs_mesh_access(priv, CMD_ACT_MESH_SET_GET_PRB_RSP_LIMIT,
219 			&mesh_access);
220 	if (ret)
221 		return ret;
222 
223 	retry_limit = le32_to_cpu(mesh_access.data[1]);
224 	return snprintf(buf, 10, "%d\n", retry_limit);
225 }
226 
227 /**
228  * lbs_prb_rsp_limit_set - Set function for sysfs attribute prb_rsp_limit
229  * @dev: the &struct device
230  * @attr: device attributes
231  * @buf: buffer that contains new attribute value
232  * @count: size of buffer
233  */
234 static ssize_t lbs_prb_rsp_limit_set(struct device *dev,
235 		struct device_attribute *attr, const char *buf, size_t count)
236 {
237 	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
238 	struct cmd_ds_mesh_access mesh_access;
239 	int ret;
240 	unsigned long retry_limit;
241 
242 	memset(&mesh_access, 0, sizeof(mesh_access));
243 	mesh_access.data[0] = cpu_to_le32(CMD_ACT_SET);
244 
245 	ret = kstrtoul(buf, 10, &retry_limit);
246 	if (ret)
247 		return ret;
248 	if (retry_limit > 15)
249 		return -ENOTSUPP;
250 
251 	mesh_access.data[1] = cpu_to_le32(retry_limit);
252 
253 	ret = lbs_mesh_access(priv, CMD_ACT_MESH_SET_GET_PRB_RSP_LIMIT,
254 			&mesh_access);
255 	if (ret)
256 		return ret;
257 
258 	return strlen(buf);
259 }
260 
261 /**
262  * lbs_mesh_get - Get function for sysfs attribute mesh
263  * @dev: the &struct device
264  * @attr: device attributes
265  * @buf: buffer where data will be returned
266  */
267 static ssize_t lbs_mesh_get(struct device *dev,
268 		struct device_attribute *attr, char * buf)
269 {
270 	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
271 	return snprintf(buf, 5, "0x%X\n", !!priv->mesh_dev);
272 }
273 
274 /**
275  * lbs_mesh_set - Set function for sysfs attribute mesh
276  * @dev: the &struct device
277  * @attr: device attributes
278  * @buf: buffer that contains new attribute value
279  * @count: size of buffer
280  */
281 static ssize_t lbs_mesh_set(struct device *dev,
282 		struct device_attribute *attr, const char * buf, size_t count)
283 {
284 	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
285 	int enable;
286 
287 	sscanf(buf, "%x", &enable);
288 	enable = !!enable;
289 	if (enable == !!priv->mesh_dev)
290 		return count;
291 
292 	if (enable)
293 		lbs_add_mesh(priv);
294 	else
295 		lbs_remove_mesh(priv);
296 
297 	return count;
298 }
299 
300 /*
301  * lbs_mesh attribute to be exported per ethX interface
302  * through sysfs (/sys/class/net/ethX/lbs_mesh)
303  */
304 static DEVICE_ATTR(lbs_mesh, 0644, lbs_mesh_get, lbs_mesh_set);
305 
306 /*
307  * anycast_mask attribute to be exported per mshX interface
308  * through sysfs (/sys/class/net/mshX/anycast_mask)
309  */
310 static DEVICE_ATTR(anycast_mask, 0644, lbs_anycast_get, lbs_anycast_set);
311 
312 /*
313  * prb_rsp_limit attribute to be exported per mshX interface
314  * through sysfs (/sys/class/net/mshX/prb_rsp_limit)
315  */
316 static DEVICE_ATTR(prb_rsp_limit, 0644, lbs_prb_rsp_limit_get,
317 		lbs_prb_rsp_limit_set);
318 
319 static struct attribute *lbs_mesh_sysfs_entries[] = {
320 	&dev_attr_anycast_mask.attr,
321 	&dev_attr_prb_rsp_limit.attr,
322 	NULL,
323 };
324 
325 static const struct attribute_group lbs_mesh_attr_group = {
326 	.attrs = lbs_mesh_sysfs_entries,
327 };
328 
329 
330 /***************************************************************************
331  * Persistent configuration support
332  */
333 
334 static int mesh_get_default_parameters(struct device *dev,
335 				       struct mrvl_mesh_defaults *defs)
336 {
337 	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
338 	struct cmd_ds_mesh_config cmd;
339 	int ret;
340 
341 	memset(&cmd, 0, sizeof(struct cmd_ds_mesh_config));
342 	ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_GET,
343 				   CMD_TYPE_MESH_GET_DEFAULTS);
344 
345 	if (ret)
346 		return -EOPNOTSUPP;
347 
348 	memcpy(defs, &cmd.data[0], sizeof(struct mrvl_mesh_defaults));
349 
350 	return 0;
351 }
352 
353 /**
354  * bootflag_get - Get function for sysfs attribute bootflag
355  * @dev: the &struct device
356  * @attr: device attributes
357  * @buf: buffer where data will be returned
358  */
359 static ssize_t bootflag_get(struct device *dev,
360 			    struct device_attribute *attr, char *buf)
361 {
362 	struct mrvl_mesh_defaults defs;
363 	int ret;
364 
365 	ret = mesh_get_default_parameters(dev, &defs);
366 
367 	if (ret)
368 		return ret;
369 
370 	return snprintf(buf, 12, "%d\n", le32_to_cpu(defs.bootflag));
371 }
372 
373 /**
374  * bootflag_set - Set function for sysfs attribute bootflag
375  * @dev: the &struct device
376  * @attr: device attributes
377  * @buf: buffer that contains new attribute value
378  * @count: size of buffer
379  */
380 static ssize_t bootflag_set(struct device *dev, struct device_attribute *attr,
381 			    const char *buf, size_t count)
382 {
383 	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
384 	struct cmd_ds_mesh_config cmd;
385 	uint32_t datum;
386 	int ret;
387 
388 	memset(&cmd, 0, sizeof(cmd));
389 	ret = sscanf(buf, "%d", &datum);
390 	if ((ret != 1) || (datum > 1))
391 		return -EINVAL;
392 
393 	*((__le32 *)&cmd.data[0]) = cpu_to_le32(!!datum);
394 	cmd.length = cpu_to_le16(sizeof(uint32_t));
395 	ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
396 				   CMD_TYPE_MESH_SET_BOOTFLAG);
397 	if (ret)
398 		return ret;
399 
400 	return strlen(buf);
401 }
402 
403 /**
404  * boottime_get - Get function for sysfs attribute boottime
405  * @dev: the &struct device
406  * @attr: device attributes
407  * @buf: buffer where data will be returned
408  */
409 static ssize_t boottime_get(struct device *dev,
410 			    struct device_attribute *attr, char *buf)
411 {
412 	struct mrvl_mesh_defaults defs;
413 	int ret;
414 
415 	ret = mesh_get_default_parameters(dev, &defs);
416 
417 	if (ret)
418 		return ret;
419 
420 	return snprintf(buf, 12, "%d\n", defs.boottime);
421 }
422 
423 /**
424  * boottime_set - Set function for sysfs attribute boottime
425  * @dev: the &struct device
426  * @attr: device attributes
427  * @buf: buffer that contains new attribute value
428  * @count: size of buffer
429  */
430 static ssize_t boottime_set(struct device *dev,
431 		struct device_attribute *attr, const char *buf, size_t count)
432 {
433 	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
434 	struct cmd_ds_mesh_config cmd;
435 	uint32_t datum;
436 	int ret;
437 
438 	memset(&cmd, 0, sizeof(cmd));
439 	ret = sscanf(buf, "%d", &datum);
440 	if ((ret != 1) || (datum > 255))
441 		return -EINVAL;
442 
443 	/* A too small boot time will result in the device booting into
444 	 * standalone (no-host) mode before the host can take control of it,
445 	 * so the change will be hard to revert.  This may be a desired
446 	 * feature (e.g to configure a very fast boot time for devices that
447 	 * will not be attached to a host), but dangerous.  So I'm enforcing a
448 	 * lower limit of 20 seconds:  remove and recompile the driver if this
449 	 * does not work for you.
450 	 */
451 	datum = (datum < 20) ? 20 : datum;
452 	cmd.data[0] = datum;
453 	cmd.length = cpu_to_le16(sizeof(uint8_t));
454 	ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
455 				   CMD_TYPE_MESH_SET_BOOTTIME);
456 	if (ret)
457 		return ret;
458 
459 	return strlen(buf);
460 }
461 
462 /**
463  * channel_get - Get function for sysfs attribute channel
464  * @dev: the &struct device
465  * @attr: device attributes
466  * @buf: buffer where data will be returned
467  */
468 static ssize_t channel_get(struct device *dev,
469 			   struct device_attribute *attr, char *buf)
470 {
471 	struct mrvl_mesh_defaults defs;
472 	int ret;
473 
474 	ret = mesh_get_default_parameters(dev, &defs);
475 
476 	if (ret)
477 		return ret;
478 
479 	return snprintf(buf, 12, "%d\n", le16_to_cpu(defs.channel));
480 }
481 
482 /**
483  * channel_set - Set function for sysfs attribute channel
484  * @dev: the &struct device
485  * @attr: device attributes
486  * @buf: buffer that contains new attribute value
487  * @count: size of buffer
488  */
489 static ssize_t channel_set(struct device *dev, struct device_attribute *attr,
490 			   const char *buf, size_t count)
491 {
492 	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
493 	struct cmd_ds_mesh_config cmd;
494 	uint32_t datum;
495 	int ret;
496 
497 	memset(&cmd, 0, sizeof(cmd));
498 	ret = sscanf(buf, "%d", &datum);
499 	if (ret != 1 || datum < 1 || datum > 11)
500 		return -EINVAL;
501 
502 	*((__le16 *)&cmd.data[0]) = cpu_to_le16(datum);
503 	cmd.length = cpu_to_le16(sizeof(uint16_t));
504 	ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
505 				   CMD_TYPE_MESH_SET_DEF_CHANNEL);
506 	if (ret)
507 		return ret;
508 
509 	return strlen(buf);
510 }
511 
512 /**
513  * mesh_id_get - Get function for sysfs attribute mesh_id
514  * @dev: the &struct device
515  * @attr: device attributes
516  * @buf: buffer where data will be returned
517  */
518 static ssize_t mesh_id_get(struct device *dev, struct device_attribute *attr,
519 			   char *buf)
520 {
521 	struct mrvl_mesh_defaults defs;
522 	int ret;
523 
524 	ret = mesh_get_default_parameters(dev, &defs);
525 
526 	if (ret)
527 		return ret;
528 
529 	if (defs.meshie.val.mesh_id_len > IEEE80211_MAX_SSID_LEN) {
530 		dev_err(dev, "inconsistent mesh ID length\n");
531 		defs.meshie.val.mesh_id_len = IEEE80211_MAX_SSID_LEN;
532 	}
533 
534 	memcpy(buf, defs.meshie.val.mesh_id, defs.meshie.val.mesh_id_len);
535 	buf[defs.meshie.val.mesh_id_len] = '\n';
536 	buf[defs.meshie.val.mesh_id_len + 1] = '\0';
537 
538 	return defs.meshie.val.mesh_id_len + 1;
539 }
540 
541 /**
542  * mesh_id_set - Set function for sysfs attribute mesh_id
543  * @dev: the &struct device
544  * @attr: device attributes
545  * @buf: buffer that contains new attribute value
546  * @count: size of buffer
547  */
548 static ssize_t mesh_id_set(struct device *dev, struct device_attribute *attr,
549 			   const char *buf, size_t count)
550 {
551 	struct cmd_ds_mesh_config cmd;
552 	struct mrvl_mesh_defaults defs;
553 	struct mrvl_meshie *ie;
554 	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
555 	int len;
556 	int ret;
557 
558 	if (count < 2 || count > IEEE80211_MAX_SSID_LEN + 1)
559 		return -EINVAL;
560 
561 	memset(&cmd, 0, sizeof(struct cmd_ds_mesh_config));
562 	ie = (struct mrvl_meshie *) &cmd.data[0];
563 
564 	/* fetch all other Information Element parameters */
565 	ret = mesh_get_default_parameters(dev, &defs);
566 
567 	cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));
568 
569 	/* transfer IE elements */
570 	memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));
571 
572 	len = count - 1;
573 	memcpy(ie->val.mesh_id, buf, len);
574 	/* SSID len */
575 	ie->val.mesh_id_len = len;
576 	/* IE len */
577 	ie->len = sizeof(struct mrvl_meshie_val) - IEEE80211_MAX_SSID_LEN + len;
578 
579 	ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
580 				   CMD_TYPE_MESH_SET_MESH_IE);
581 	if (ret)
582 		return ret;
583 
584 	return strlen(buf);
585 }
586 
587 /**
588  * protocol_id_get - Get function for sysfs attribute protocol_id
589  * @dev: the &struct device
590  * @attr: device attributes
591  * @buf: buffer where data will be returned
592  */
593 static ssize_t protocol_id_get(struct device *dev,
594 			       struct device_attribute *attr, char *buf)
595 {
596 	struct mrvl_mesh_defaults defs;
597 	int ret;
598 
599 	ret = mesh_get_default_parameters(dev, &defs);
600 
601 	if (ret)
602 		return ret;
603 
604 	return snprintf(buf, 5, "%d\n", defs.meshie.val.active_protocol_id);
605 }
606 
607 /**
608  * protocol_id_set - Set function for sysfs attribute protocol_id
609  * @dev: the &struct device
610  * @attr: device attributes
611  * @buf: buffer that contains new attribute value
612  * @count: size of buffer
613  */
614 static ssize_t protocol_id_set(struct device *dev,
615 		struct device_attribute *attr, const char *buf, size_t count)
616 {
617 	struct cmd_ds_mesh_config cmd;
618 	struct mrvl_mesh_defaults defs;
619 	struct mrvl_meshie *ie;
620 	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
621 	uint32_t datum;
622 	int ret;
623 
624 	memset(&cmd, 0, sizeof(cmd));
625 	ret = sscanf(buf, "%d", &datum);
626 	if ((ret != 1) || (datum > 255))
627 		return -EINVAL;
628 
629 	/* fetch all other Information Element parameters */
630 	ret = mesh_get_default_parameters(dev, &defs);
631 
632 	cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));
633 
634 	/* transfer IE elements */
635 	ie = (struct mrvl_meshie *) &cmd.data[0];
636 	memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));
637 	/* update protocol id */
638 	ie->val.active_protocol_id = datum;
639 
640 	ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
641 				   CMD_TYPE_MESH_SET_MESH_IE);
642 	if (ret)
643 		return ret;
644 
645 	return strlen(buf);
646 }
647 
648 /**
649  * metric_id_get - Get function for sysfs attribute metric_id
650  * @dev: the &struct device
651  * @attr: device attributes
652  * @buf: buffer where data will be returned
653  */
654 static ssize_t metric_id_get(struct device *dev,
655 		struct device_attribute *attr, char *buf)
656 {
657 	struct mrvl_mesh_defaults defs;
658 	int ret;
659 
660 	ret = mesh_get_default_parameters(dev, &defs);
661 
662 	if (ret)
663 		return ret;
664 
665 	return snprintf(buf, 5, "%d\n", defs.meshie.val.active_metric_id);
666 }
667 
668 /**
669  * metric_id_set - Set function for sysfs attribute metric_id
670  * @dev: the &struct device
671  * @attr: device attributes
672  * @buf: buffer that contains new attribute value
673  * @count: size of buffer
674  */
675 static ssize_t metric_id_set(struct device *dev, struct device_attribute *attr,
676 			     const char *buf, size_t count)
677 {
678 	struct cmd_ds_mesh_config cmd;
679 	struct mrvl_mesh_defaults defs;
680 	struct mrvl_meshie *ie;
681 	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
682 	uint32_t datum;
683 	int ret;
684 
685 	memset(&cmd, 0, sizeof(cmd));
686 	ret = sscanf(buf, "%d", &datum);
687 	if ((ret != 1) || (datum > 255))
688 		return -EINVAL;
689 
690 	/* fetch all other Information Element parameters */
691 	ret = mesh_get_default_parameters(dev, &defs);
692 
693 	cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));
694 
695 	/* transfer IE elements */
696 	ie = (struct mrvl_meshie *) &cmd.data[0];
697 	memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));
698 	/* update metric id */
699 	ie->val.active_metric_id = datum;
700 
701 	ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
702 				   CMD_TYPE_MESH_SET_MESH_IE);
703 	if (ret)
704 		return ret;
705 
706 	return strlen(buf);
707 }
708 
709 /**
710  * capability_get - Get function for sysfs attribute capability
711  * @dev: the &struct device
712  * @attr: device attributes
713  * @buf: buffer where data will be returned
714  */
715 static ssize_t capability_get(struct device *dev,
716 		struct device_attribute *attr, char *buf)
717 {
718 	struct mrvl_mesh_defaults defs;
719 	int ret;
720 
721 	ret = mesh_get_default_parameters(dev, &defs);
722 
723 	if (ret)
724 		return ret;
725 
726 	return snprintf(buf, 5, "%d\n", defs.meshie.val.mesh_capability);
727 }
728 
729 /**
730  * capability_set - Set function for sysfs attribute capability
731  * @dev: the &struct device
732  * @attr: device attributes
733  * @buf: buffer that contains new attribute value
734  * @count: size of buffer
735  */
736 static ssize_t capability_set(struct device *dev, struct device_attribute *attr,
737 			      const char *buf, size_t count)
738 {
739 	struct cmd_ds_mesh_config cmd;
740 	struct mrvl_mesh_defaults defs;
741 	struct mrvl_meshie *ie;
742 	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
743 	uint32_t datum;
744 	int ret;
745 
746 	memset(&cmd, 0, sizeof(cmd));
747 	ret = sscanf(buf, "%d", &datum);
748 	if ((ret != 1) || (datum > 255))
749 		return -EINVAL;
750 
751 	/* fetch all other Information Element parameters */
752 	ret = mesh_get_default_parameters(dev, &defs);
753 
754 	cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));
755 
756 	/* transfer IE elements */
757 	ie = (struct mrvl_meshie *) &cmd.data[0];
758 	memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));
759 	/* update value */
760 	ie->val.mesh_capability = datum;
761 
762 	ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
763 				   CMD_TYPE_MESH_SET_MESH_IE);
764 	if (ret)
765 		return ret;
766 
767 	return strlen(buf);
768 }
769 
770 
771 static DEVICE_ATTR(bootflag, 0644, bootflag_get, bootflag_set);
772 static DEVICE_ATTR(boottime, 0644, boottime_get, boottime_set);
773 static DEVICE_ATTR(channel, 0644, channel_get, channel_set);
774 static DEVICE_ATTR(mesh_id, 0644, mesh_id_get, mesh_id_set);
775 static DEVICE_ATTR(protocol_id, 0644, protocol_id_get, protocol_id_set);
776 static DEVICE_ATTR(metric_id, 0644, metric_id_get, metric_id_set);
777 static DEVICE_ATTR(capability, 0644, capability_get, capability_set);
778 
779 static struct attribute *boot_opts_attrs[] = {
780 	&dev_attr_bootflag.attr,
781 	&dev_attr_boottime.attr,
782 	&dev_attr_channel.attr,
783 	NULL
784 };
785 
786 static const struct attribute_group boot_opts_group = {
787 	.name = "boot_options",
788 	.attrs = boot_opts_attrs,
789 };
790 
791 static struct attribute *mesh_ie_attrs[] = {
792 	&dev_attr_mesh_id.attr,
793 	&dev_attr_protocol_id.attr,
794 	&dev_attr_metric_id.attr,
795 	&dev_attr_capability.attr,
796 	NULL
797 };
798 
799 static const struct attribute_group mesh_ie_group = {
800 	.name = "mesh_ie",
801 	.attrs = mesh_ie_attrs,
802 };
803 
804 
805 /***************************************************************************
806  * Initializing and starting, stopping mesh
807  */
808 
809 /*
810  * Check mesh FW version and appropriately send the mesh start
811  * command
812  */
813 void lbs_init_mesh(struct lbs_private *priv)
814 {
815 	/* Determine mesh_fw_ver from fwrelease and fwcapinfo */
816 	/* 5.0.16p0 9.0.0.p0 is known to NOT support any mesh */
817 	/* 5.110.22 have mesh command with 0xa3 command id */
818 	/* 10.0.0.p0 FW brings in mesh config command with different id */
819 	/* Check FW version MSB and initialize mesh_fw_ver */
820 	if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5) {
821 		/* Enable mesh, if supported, and work out which TLV it uses.
822 		   0x100 + 291 is an unofficial value used in 5.110.20.pXX
823 		   0x100 + 37 is the official value used in 5.110.21.pXX
824 		   but we check them in that order because 20.pXX doesn't
825 		   give an error -- it just silently fails. */
826 
827 		/* 5.110.20.pXX firmware will fail the command if the channel
828 		   doesn't match the existing channel. But only if the TLV
829 		   is correct. If the channel is wrong, _BOTH_ versions will
830 		   give an error to 0x100+291, and allow 0x100+37 to succeed.
831 		   It's just that 5.110.20.pXX will not have done anything
832 		   useful */
833 
834 		priv->mesh_tlv = TLV_TYPE_OLD_MESH_ID;
835 		if (lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, 1)) {
836 			priv->mesh_tlv = TLV_TYPE_MESH_ID;
837 			if (lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, 1))
838 				priv->mesh_tlv = 0;
839 		}
840 	} else
841 	if ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) &&
842 		(priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK)) {
843 		/* 10.0.0.pXX new firmwares should succeed with TLV
844 		 * 0x100+37; Do not invoke command with old TLV.
845 		 */
846 		priv->mesh_tlv = TLV_TYPE_MESH_ID;
847 		if (lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, 1))
848 			priv->mesh_tlv = 0;
849 	}
850 
851 	/* Stop meshing until interface is brought up */
852 	lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_STOP, 1);
853 }
854 
855 void lbs_start_mesh(struct lbs_private *priv)
856 {
857 	lbs_add_mesh(priv);
858 
859 	if (device_create_file(&priv->dev->dev, &dev_attr_lbs_mesh))
860 		netdev_err(priv->dev, "cannot register lbs_mesh attribute\n");
861 }
862 
863 int lbs_deinit_mesh(struct lbs_private *priv)
864 {
865 	struct net_device *dev = priv->dev;
866 	int ret = 0;
867 
868 	if (priv->mesh_tlv) {
869 		device_remove_file(&dev->dev, &dev_attr_lbs_mesh);
870 		ret = 1;
871 	}
872 
873 	return ret;
874 }
875 
876 
877 /**
878  * lbs_mesh_stop - close the mshX interface
879  *
880  * @dev:	A pointer to &net_device structure
881  * returns:	0
882  */
883 static int lbs_mesh_stop(struct net_device *dev)
884 {
885 	struct lbs_private *priv = dev->ml_priv;
886 
887 	lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_STOP,
888 		lbs_mesh_get_channel(priv));
889 
890 	spin_lock_irq(&priv->driver_lock);
891 
892 	netif_stop_queue(dev);
893 	netif_carrier_off(dev);
894 
895 	spin_unlock_irq(&priv->driver_lock);
896 
897 	lbs_update_mcast(priv);
898 	if (!lbs_iface_active(priv))
899 		lbs_stop_iface(priv);
900 
901 	return 0;
902 }
903 
904 /**
905  * lbs_mesh_dev_open - open the mshX interface
906  *
907  * @dev:	A pointer to &net_device structure
908  * returns:	0 or -EBUSY if monitor mode active
909  */
910 static int lbs_mesh_dev_open(struct net_device *dev)
911 {
912 	struct lbs_private *priv = dev->ml_priv;
913 	int ret = 0;
914 
915 	if (!priv->iface_running) {
916 		ret = lbs_start_iface(priv);
917 		if (ret)
918 			goto out;
919 	}
920 
921 	spin_lock_irq(&priv->driver_lock);
922 
923 	if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) {
924 		ret = -EBUSY;
925 		spin_unlock_irq(&priv->driver_lock);
926 		goto out;
927 	}
928 
929 	netif_carrier_on(dev);
930 
931 	if (!priv->tx_pending_len)
932 		netif_wake_queue(dev);
933 
934 	spin_unlock_irq(&priv->driver_lock);
935 
936 	ret = lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START,
937 		lbs_mesh_get_channel(priv));
938 
939 out:
940 	return ret;
941 }
942 
943 static const struct net_device_ops mesh_netdev_ops = {
944 	.ndo_open		= lbs_mesh_dev_open,
945 	.ndo_stop 		= lbs_mesh_stop,
946 	.ndo_start_xmit		= lbs_hard_start_xmit,
947 	.ndo_set_mac_address	= lbs_set_mac_address,
948 	.ndo_set_rx_mode	= lbs_set_multicast_list,
949 };
950 
951 /**
952  * lbs_add_mesh - add mshX interface
953  *
954  * @priv:	A pointer to the &struct lbs_private structure
955  * returns:	0 if successful, -X otherwise
956  */
957 static int lbs_add_mesh(struct lbs_private *priv)
958 {
959 	struct net_device *mesh_dev = NULL;
960 	struct wireless_dev *mesh_wdev;
961 	int ret = 0;
962 
963 	/* Allocate a virtual mesh device */
964 	mesh_wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
965 	if (!mesh_wdev) {
966 		lbs_deb_mesh("init mshX wireless device failed\n");
967 		ret = -ENOMEM;
968 		goto done;
969 	}
970 
971 	mesh_dev = alloc_netdev(0, "msh%d", NET_NAME_UNKNOWN, ether_setup);
972 	if (!mesh_dev) {
973 		lbs_deb_mesh("init mshX device failed\n");
974 		ret = -ENOMEM;
975 		goto err_free_wdev;
976 	}
977 
978 	mesh_wdev->iftype = NL80211_IFTYPE_MESH_POINT;
979 	mesh_wdev->wiphy = priv->wdev->wiphy;
980 
981 	if (priv->mesh_tlv) {
982 		sprintf(mesh_wdev->ssid, "mesh");
983 		mesh_wdev->mesh_id_up_len = 4;
984 	}
985 
986 	mesh_wdev->netdev = mesh_dev;
987 
988 	mesh_dev->ml_priv = priv;
989 	mesh_dev->ieee80211_ptr = mesh_wdev;
990 	priv->mesh_dev = mesh_dev;
991 
992 	mesh_dev->netdev_ops = &mesh_netdev_ops;
993 	mesh_dev->ethtool_ops = &lbs_ethtool_ops;
994 	eth_hw_addr_inherit(mesh_dev, priv->dev);
995 
996 	SET_NETDEV_DEV(priv->mesh_dev, priv->dev->dev.parent);
997 
998 	mesh_dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
999 	mesh_dev->sysfs_groups[0] = &lbs_mesh_attr_group;
1000 	mesh_dev->sysfs_groups[1] = &boot_opts_group;
1001 	mesh_dev->sysfs_groups[2] = &mesh_ie_group;
1002 
1003 	/* Register virtual mesh interface */
1004 	ret = register_netdev(mesh_dev);
1005 	if (ret) {
1006 		pr_err("cannot register mshX virtual interface\n");
1007 		goto err_free_netdev;
1008 	}
1009 
1010 	/* Everything successful */
1011 	ret = 0;
1012 	goto done;
1013 
1014 err_free_netdev:
1015 	free_netdev(mesh_dev);
1016 
1017 err_free_wdev:
1018 	kfree(mesh_wdev);
1019 
1020 done:
1021 	return ret;
1022 }
1023 
1024 void lbs_remove_mesh(struct lbs_private *priv)
1025 {
1026 	struct net_device *mesh_dev;
1027 
1028 	mesh_dev = priv->mesh_dev;
1029 	if (!mesh_dev)
1030 		return;
1031 
1032 	netif_stop_queue(mesh_dev);
1033 	netif_carrier_off(mesh_dev);
1034 	unregister_netdev(mesh_dev);
1035 	priv->mesh_dev = NULL;
1036 	kfree(mesh_dev->ieee80211_ptr);
1037 	free_netdev(mesh_dev);
1038 }
1039 
1040 
1041 /***************************************************************************
1042  * Sending and receiving
1043  */
1044 struct net_device *lbs_mesh_set_dev(struct lbs_private *priv,
1045 	struct net_device *dev, struct rxpd *rxpd)
1046 {
1047 	if (priv->mesh_dev) {
1048 		if (priv->mesh_tlv == TLV_TYPE_OLD_MESH_ID) {
1049 			if (rxpd->rx_control & RxPD_MESH_FRAME)
1050 				dev = priv->mesh_dev;
1051 		} else if (priv->mesh_tlv == TLV_TYPE_MESH_ID) {
1052 			if (rxpd->u.bss.bss_num == MESH_IFACE_ID)
1053 				dev = priv->mesh_dev;
1054 		}
1055 	}
1056 	return dev;
1057 }
1058 
1059 
1060 void lbs_mesh_set_txpd(struct lbs_private *priv,
1061 	struct net_device *dev, struct txpd *txpd)
1062 {
1063 	if (dev == priv->mesh_dev) {
1064 		if (priv->mesh_tlv == TLV_TYPE_OLD_MESH_ID)
1065 			txpd->tx_control |= cpu_to_le32(TxPD_MESH_FRAME);
1066 		else if (priv->mesh_tlv == TLV_TYPE_MESH_ID)
1067 			txpd->u.bss.bss_num = MESH_IFACE_ID;
1068 	}
1069 }
1070 
1071 
1072 /***************************************************************************
1073  * Ethtool related
1074  */
1075 
1076 static const char mesh_stat_strings[MESH_STATS_NUM][ETH_GSTRING_LEN] = {
1077 	"drop_duplicate_bcast",
1078 	"drop_ttl_zero",
1079 	"drop_no_fwd_route",
1080 	"drop_no_buffers",
1081 	"fwded_unicast_cnt",
1082 	"fwded_bcast_cnt",
1083 	"drop_blind_table",
1084 	"tx_failed_cnt"
1085 };
1086 
1087 void lbs_mesh_ethtool_get_stats(struct net_device *dev,
1088 	struct ethtool_stats *stats, uint64_t *data)
1089 {
1090 	struct lbs_private *priv = dev->ml_priv;
1091 	struct cmd_ds_mesh_access mesh_access;
1092 	int ret;
1093 
1094 	/* Get Mesh Statistics */
1095 	ret = lbs_mesh_access(priv, CMD_ACT_MESH_GET_STATS, &mesh_access);
1096 
1097 	if (ret) {
1098 		memset(data, 0, MESH_STATS_NUM*(sizeof(uint64_t)));
1099 		return;
1100 	}
1101 
1102 	priv->mstats.fwd_drop_rbt = le32_to_cpu(mesh_access.data[0]);
1103 	priv->mstats.fwd_drop_ttl = le32_to_cpu(mesh_access.data[1]);
1104 	priv->mstats.fwd_drop_noroute = le32_to_cpu(mesh_access.data[2]);
1105 	priv->mstats.fwd_drop_nobuf = le32_to_cpu(mesh_access.data[3]);
1106 	priv->mstats.fwd_unicast_cnt = le32_to_cpu(mesh_access.data[4]);
1107 	priv->mstats.fwd_bcast_cnt = le32_to_cpu(mesh_access.data[5]);
1108 	priv->mstats.drop_blind = le32_to_cpu(mesh_access.data[6]);
1109 	priv->mstats.tx_failed_cnt = le32_to_cpu(mesh_access.data[7]);
1110 
1111 	data[0] = priv->mstats.fwd_drop_rbt;
1112 	data[1] = priv->mstats.fwd_drop_ttl;
1113 	data[2] = priv->mstats.fwd_drop_noroute;
1114 	data[3] = priv->mstats.fwd_drop_nobuf;
1115 	data[4] = priv->mstats.fwd_unicast_cnt;
1116 	data[5] = priv->mstats.fwd_bcast_cnt;
1117 	data[6] = priv->mstats.drop_blind;
1118 	data[7] = priv->mstats.tx_failed_cnt;
1119 }
1120 
1121 int lbs_mesh_ethtool_get_sset_count(struct net_device *dev, int sset)
1122 {
1123 	struct lbs_private *priv = dev->ml_priv;
1124 
1125 	if (sset == ETH_SS_STATS && dev == priv->mesh_dev)
1126 		return MESH_STATS_NUM;
1127 
1128 	return -EOPNOTSUPP;
1129 }
1130 
1131 void lbs_mesh_ethtool_get_strings(struct net_device *dev,
1132 	uint32_t stringset, uint8_t *s)
1133 {
1134 	switch (stringset) {
1135 	case ETH_SS_STATS:
1136 		memcpy(s, mesh_stat_strings, sizeof(mesh_stat_strings));
1137 		break;
1138 	}
1139 }
1140