mib.c revision e885a47a474fe53ed7d952af4b6e9a5cf86d9a07 
1/*
2 * Copyright 2007-2012 Siemens AG
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2
6 * as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
16 *
17 * Written by:
18 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
19 * Sergey Lapin <slapin@ossfans.org>
20 * Maxim Gorbachyov <maxim.gorbachev@siemens.com>
21 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
22 */
23
24#include <linux/if_arp.h>
25
26#include <net/mac802154.h>
27#include <net/wpan-phy.h>
28
29#include "mac802154.h"
30
31struct phy_chan_notify_work {
32	struct work_struct work;
33	struct net_device *dev;
34};
35
36struct hw_addr_filt_notify_work {
37	struct work_struct work;
38	struct net_device *dev;
39	unsigned long changed;
40};
41
42struct mac802154_priv *mac802154_slave_get_priv(struct net_device *dev)
43{
44	struct mac802154_sub_if_data *priv = netdev_priv(dev);
45
46	BUG_ON(dev->type != ARPHRD_IEEE802154);
47
48	return priv->hw;
49}
50
51static void hw_addr_notify(struct work_struct *work)
52{
53	struct hw_addr_filt_notify_work *nw = container_of(work,
54			struct hw_addr_filt_notify_work, work);
55	struct mac802154_priv *hw = mac802154_slave_get_priv(nw->dev);
56	int res;
57
58	res = hw->ops->set_hw_addr_filt(&hw->hw,
59					&hw->hw.hw_filt,
60					nw->changed);
61	if (res)
62		pr_debug("failed changed mask %lx\n", nw->changed);
63
64	kfree(nw);
65
66	return;
67}
68
69static void set_hw_addr_filt(struct net_device *dev, unsigned long changed)
70{
71	struct mac802154_sub_if_data *priv = netdev_priv(dev);
72	struct hw_addr_filt_notify_work *work;
73
74	work = kzalloc(sizeof(*work), GFP_ATOMIC);
75	if (!work)
76		return;
77
78	INIT_WORK(&work->work, hw_addr_notify);
79	work->dev = dev;
80	work->changed = changed;
81	queue_work(priv->hw->dev_workqueue, &work->work);
82
83	return;
84}
85
86void mac802154_dev_set_short_addr(struct net_device *dev, u16 val)
87{
88	struct mac802154_sub_if_data *priv = netdev_priv(dev);
89
90	BUG_ON(dev->type != ARPHRD_IEEE802154);
91
92	spin_lock_bh(&priv->mib_lock);
93	priv->short_addr = val;
94	spin_unlock_bh(&priv->mib_lock);
95
96	if ((priv->hw->ops->set_hw_addr_filt) &&
97	    (priv->hw->hw.hw_filt.short_addr != priv->short_addr)) {
98		priv->hw->hw.hw_filt.short_addr = priv->short_addr;
99		set_hw_addr_filt(dev, IEEE802515_AFILT_SADDR_CHANGED);
100	}
101}
102
103u16 mac802154_dev_get_short_addr(const struct net_device *dev)
104{
105	struct mac802154_sub_if_data *priv = netdev_priv(dev);
106	u16 ret;
107
108	BUG_ON(dev->type != ARPHRD_IEEE802154);
109
110	spin_lock_bh(&priv->mib_lock);
111	ret = priv->short_addr;
112	spin_unlock_bh(&priv->mib_lock);
113
114	return ret;
115}
116
117void mac802154_dev_set_ieee_addr(struct net_device *dev)
118{
119	struct mac802154_sub_if_data *priv = netdev_priv(dev);
120	struct mac802154_priv *mac = priv->hw;
121
122	if (mac->ops->set_hw_addr_filt &&
123	    memcmp(mac->hw.hw_filt.ieee_addr,
124		   dev->dev_addr, IEEE802154_ADDR_LEN)) {
125		memcpy(mac->hw.hw_filt.ieee_addr,
126		       dev->dev_addr, IEEE802154_ADDR_LEN);
127		set_hw_addr_filt(dev, IEEE802515_AFILT_IEEEADDR_CHANGED);
128	}
129}
130
131u16 mac802154_dev_get_pan_id(const struct net_device *dev)
132{
133	struct mac802154_sub_if_data *priv = netdev_priv(dev);
134	u16 ret;
135
136	BUG_ON(dev->type != ARPHRD_IEEE802154);
137
138	spin_lock_bh(&priv->mib_lock);
139	ret = priv->pan_id;
140	spin_unlock_bh(&priv->mib_lock);
141
142	return ret;
143}
144
145void mac802154_dev_set_pan_id(struct net_device *dev, u16 val)
146{
147	struct mac802154_sub_if_data *priv = netdev_priv(dev);
148
149	BUG_ON(dev->type != ARPHRD_IEEE802154);
150
151	spin_lock_bh(&priv->mib_lock);
152	priv->pan_id = val;
153	spin_unlock_bh(&priv->mib_lock);
154
155	if ((priv->hw->ops->set_hw_addr_filt) &&
156	    (priv->hw->hw.hw_filt.pan_id != priv->pan_id)) {
157		priv->hw->hw.hw_filt.pan_id = priv->pan_id;
158		set_hw_addr_filt(dev, IEEE802515_AFILT_PANID_CHANGED);
159	}
160}
161
162static void phy_chan_notify(struct work_struct *work)
163{
164	struct phy_chan_notify_work *nw = container_of(work,
165					  struct phy_chan_notify_work, work);
166	struct mac802154_priv *hw = mac802154_slave_get_priv(nw->dev);
167	struct mac802154_sub_if_data *priv = netdev_priv(nw->dev);
168	int res;
169
170	res = hw->ops->set_channel(&hw->hw, priv->page, priv->chan);
171	if (res)
172		pr_debug("set_channel failed\n");
173
174	kfree(nw);
175}
176
177void mac802154_dev_set_page_channel(struct net_device *dev, u8 page, u8 chan)
178{
179	struct mac802154_sub_if_data *priv = netdev_priv(dev);
180	struct phy_chan_notify_work *work;
181
182	BUG_ON(dev->type != ARPHRD_IEEE802154);
183
184	spin_lock_bh(&priv->mib_lock);
185	priv->page = page;
186	priv->chan = chan;
187	spin_unlock_bh(&priv->mib_lock);
188
189	if (priv->hw->phy->current_channel != priv->chan ||
190	    priv->hw->phy->current_page != priv->page) {
191		work = kzalloc(sizeof(*work), GFP_ATOMIC);
192		if (!work)
193			return;
194
195		INIT_WORK(&work->work, phy_chan_notify);
196		work->dev = dev;
197		queue_work(priv->hw->dev_workqueue, &work->work);
198	}
199}
200