ieee802154: enforce consistent endianness in the 802.15.4 stack
[firefly-linux-kernel-4.4.55.git] / net / mac802154 / mib.c
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/ieee802154_netdev.h>
28 #include <net/wpan-phy.h>
29
30 #include "mac802154.h"
31
32 struct phy_chan_notify_work {
33         struct work_struct work;
34         struct net_device *dev;
35 };
36
37 struct hw_addr_filt_notify_work {
38         struct work_struct work;
39         struct net_device *dev;
40         unsigned long changed;
41 };
42
43 static struct mac802154_priv *mac802154_slave_get_priv(struct net_device *dev)
44 {
45         struct mac802154_sub_if_data *priv = netdev_priv(dev);
46
47         BUG_ON(dev->type != ARPHRD_IEEE802154);
48
49         return priv->hw;
50 }
51
52 static void hw_addr_notify(struct work_struct *work)
53 {
54         struct hw_addr_filt_notify_work *nw = container_of(work,
55                         struct hw_addr_filt_notify_work, work);
56         struct mac802154_priv *hw = mac802154_slave_get_priv(nw->dev);
57         int res;
58
59         res = hw->ops->set_hw_addr_filt(&hw->hw,
60                                         &hw->hw.hw_filt,
61                                         nw->changed);
62         if (res)
63                 pr_debug("failed changed mask %lx\n", nw->changed);
64
65         kfree(nw);
66 }
67
68 static void set_hw_addr_filt(struct net_device *dev, unsigned long changed)
69 {
70         struct mac802154_sub_if_data *priv = netdev_priv(dev);
71         struct hw_addr_filt_notify_work *work;
72
73         work = kzalloc(sizeof(*work), GFP_ATOMIC);
74         if (!work)
75                 return;
76
77         INIT_WORK(&work->work, hw_addr_notify);
78         work->dev = dev;
79         work->changed = changed;
80         queue_work(priv->hw->dev_workqueue, &work->work);
81 }
82
83 void mac802154_dev_set_short_addr(struct net_device *dev, __le16 val)
84 {
85         struct mac802154_sub_if_data *priv = netdev_priv(dev);
86
87         BUG_ON(dev->type != ARPHRD_IEEE802154);
88
89         spin_lock_bh(&priv->mib_lock);
90         priv->short_addr = val;
91         spin_unlock_bh(&priv->mib_lock);
92
93         if ((priv->hw->ops->set_hw_addr_filt) &&
94             (priv->hw->hw.hw_filt.short_addr != priv->short_addr)) {
95                 priv->hw->hw.hw_filt.short_addr = priv->short_addr;
96                 set_hw_addr_filt(dev, IEEE802515_AFILT_SADDR_CHANGED);
97         }
98 }
99
100 __le16 mac802154_dev_get_short_addr(const struct net_device *dev)
101 {
102         struct mac802154_sub_if_data *priv = netdev_priv(dev);
103         __le16 ret;
104
105         BUG_ON(dev->type != ARPHRD_IEEE802154);
106
107         spin_lock_bh(&priv->mib_lock);
108         ret = priv->short_addr;
109         spin_unlock_bh(&priv->mib_lock);
110
111         return ret;
112 }
113
114 void mac802154_dev_set_ieee_addr(struct net_device *dev)
115 {
116         struct mac802154_sub_if_data *priv = netdev_priv(dev);
117         struct mac802154_priv *mac = priv->hw;
118         __le64 addr;
119
120         addr = ieee802154_devaddr_from_raw(dev->dev_addr);
121         priv->extended_addr = addr;
122
123         if (mac->ops->set_hw_addr_filt && mac->hw.hw_filt.ieee_addr != addr) {
124                 mac->hw.hw_filt.ieee_addr = addr;
125                 set_hw_addr_filt(dev, IEEE802515_AFILT_IEEEADDR_CHANGED);
126         }
127 }
128
129 __le16 mac802154_dev_get_pan_id(const struct net_device *dev)
130 {
131         struct mac802154_sub_if_data *priv = netdev_priv(dev);
132         __le16 ret;
133
134         BUG_ON(dev->type != ARPHRD_IEEE802154);
135
136         spin_lock_bh(&priv->mib_lock);
137         ret = priv->pan_id;
138         spin_unlock_bh(&priv->mib_lock);
139
140         return ret;
141 }
142
143 void mac802154_dev_set_pan_id(struct net_device *dev, __le16 val)
144 {
145         struct mac802154_sub_if_data *priv = netdev_priv(dev);
146
147         BUG_ON(dev->type != ARPHRD_IEEE802154);
148
149         spin_lock_bh(&priv->mib_lock);
150         priv->pan_id = val;
151         spin_unlock_bh(&priv->mib_lock);
152
153         if ((priv->hw->ops->set_hw_addr_filt) &&
154             (priv->hw->hw.hw_filt.pan_id != priv->pan_id)) {
155                 priv->hw->hw.hw_filt.pan_id = priv->pan_id;
156                 set_hw_addr_filt(dev, IEEE802515_AFILT_PANID_CHANGED);
157         }
158 }
159
160 u8 mac802154_dev_get_dsn(const struct net_device *dev)
161 {
162         struct mac802154_sub_if_data *priv = netdev_priv(dev);
163
164         BUG_ON(dev->type != ARPHRD_IEEE802154);
165
166         return priv->dsn++;
167 }
168
169 static void phy_chan_notify(struct work_struct *work)
170 {
171         struct phy_chan_notify_work *nw = container_of(work,
172                                           struct phy_chan_notify_work, work);
173         struct mac802154_priv *hw = mac802154_slave_get_priv(nw->dev);
174         struct mac802154_sub_if_data *priv = netdev_priv(nw->dev);
175         int res;
176
177         mutex_lock(&priv->hw->phy->pib_lock);
178         res = hw->ops->set_channel(&hw->hw, priv->page, priv->chan);
179         if (res)
180                 pr_debug("set_channel failed\n");
181         else {
182                 priv->hw->phy->current_channel = priv->chan;
183                 priv->hw->phy->current_page = priv->page;
184         }
185         mutex_unlock(&priv->hw->phy->pib_lock);
186
187         kfree(nw);
188 }
189
190 void mac802154_dev_set_page_channel(struct net_device *dev, u8 page, u8 chan)
191 {
192         struct mac802154_sub_if_data *priv = netdev_priv(dev);
193         struct phy_chan_notify_work *work;
194
195         BUG_ON(dev->type != ARPHRD_IEEE802154);
196
197         spin_lock_bh(&priv->mib_lock);
198         priv->page = page;
199         priv->chan = chan;
200         spin_unlock_bh(&priv->mib_lock);
201
202         mutex_lock(&priv->hw->phy->pib_lock);
203         if (priv->hw->phy->current_channel != priv->chan ||
204             priv->hw->phy->current_page != priv->page) {
205                 mutex_unlock(&priv->hw->phy->pib_lock);
206
207                 work = kzalloc(sizeof(*work), GFP_ATOMIC);
208                 if (!work)
209                         return;
210
211                 INIT_WORK(&work->work, phy_chan_notify);
212                 work->dev = dev;
213                 queue_work(priv->hw->dev_workqueue, &work->work);
214         } else
215                 mutex_unlock(&priv->hw->phy->pib_lock);
216 }