Commit | Line | Data |
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5b641ebe | 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 | * | |
5b641ebe | 13 | * Written by: |
14 | * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> | |
15 | * Sergey Lapin <slapin@ossfans.org> | |
16 | * Maxim Gorbachyov <maxim.gorbachev@siemens.com> | |
17 | * Alexander Smirnov <alex.bluesman.smirnov@gmail.com> | |
18 | */ | |
19 | ||
20 | #include <linux/netdevice.h> | |
21 | #include <linux/if_arp.h> | |
22 | #include <linux/crc-ccitt.h> | |
061ef8f9 | 23 | #include <asm/unaligned.h> |
5b641ebe | 24 | |
6001d522 | 25 | #include <net/rtnetlink.h> |
b5992fe9 | 26 | #include <net/ieee802154_netdev.h> |
5b641ebe | 27 | #include <net/mac802154.h> |
5ad60d36 | 28 | #include <net/cfg802154.h> |
5b641ebe | 29 | |
0f1556bc | 30 | #include "ieee802154_i.h" |
59cb300f | 31 | #include "driver-ops.h" |
5b641ebe | 32 | |
c22ff7b4 | 33 | void ieee802154_xmit_worker(struct work_struct *work) |
5b641ebe | 34 | { |
c22ff7b4 LB |
35 | struct ieee802154_local *local = |
36 | container_of(work, struct ieee802154_local, tx_work); | |
37 | struct sk_buff *skb = local->tx_skb; | |
409c3b0c | 38 | struct net_device *dev = skb->dev; |
5b641ebe | 39 | int res; |
40 | ||
6001d522 AA |
41 | rtnl_lock(); |
42 | ||
43 | /* check if ifdown occurred while schedule */ | |
409c3b0c | 44 | if (!netif_running(dev)) |
6001d522 AA |
45 | goto err_tx; |
46 | ||
59cb300f | 47 | res = drv_xmit_sync(local, skb); |
6001d522 AA |
48 | if (res) |
49 | goto err_tx; | |
50 | ||
61f2dcba | 51 | ieee802154_xmit_complete(&local->hw, skb, false); |
6001d522 | 52 | |
409c3b0c AA |
53 | dev->stats.tx_packets++; |
54 | dev->stats.tx_bytes += skb->len; | |
55 | ||
6001d522 AA |
56 | rtnl_unlock(); |
57 | ||
58 | return; | |
59 | ||
60 | err_tx: | |
61 | /* Restart the netif queue on each sub_if_data object. */ | |
62 | ieee802154_wake_queue(&local->hw); | |
63 | rtnl_unlock(); | |
64 | kfree_skb(skb); | |
409c3b0c | 65 | netdev_dbg(dev, "transmission failed\n"); |
5b641ebe | 66 | } |
67 | ||
dc67c6b3 | 68 | static netdev_tx_t |
e5e584fc | 69 | ieee802154_tx(struct ieee802154_local *local, struct sk_buff *skb) |
5b641ebe | 70 | { |
409c3b0c | 71 | struct net_device *dev = skb->dev; |
ed0a5dce | 72 | int ret; |
5b641ebe | 73 | |
90386a7e | 74 | if (!(local->hw.flags & IEEE802154_HW_TX_OMIT_CKSUM)) { |
061ef8f9 | 75 | u16 crc = crc_ccitt(0, skb->data, skb->len); |
4710d806 | 76 | |
061ef8f9 | 77 | put_unaligned_le16(crc, skb_put(skb, 2)); |
5b641ebe | 78 | } |
79 | ||
a5e1ec53 | 80 | if (skb_cow_head(skb, local->hw.extra_tx_headroom)) |
f5588912 | 81 | goto err_tx; |
5b641ebe | 82 | |
b5992fe9 | 83 | /* Stop the netif queue on each sub_if_data object. */ |
18d60a0d | 84 | ieee802154_stop_queue(&local->hw); |
b5992fe9 | 85 | |
ed0a5dce AA |
86 | /* async is priority, otherwise sync is fallback */ |
87 | if (local->ops->xmit_async) { | |
59cb300f | 88 | ret = drv_xmit_async(local, skb); |
ed0a5dce AA |
89 | if (ret) { |
90 | ieee802154_wake_queue(&local->hw); | |
91 | goto err_tx; | |
92 | } | |
409c3b0c AA |
93 | |
94 | dev->stats.tx_packets++; | |
95 | dev->stats.tx_bytes += skb->len; | |
ed0a5dce | 96 | } else { |
c22ff7b4 LB |
97 | local->tx_skb = skb; |
98 | queue_work(local->workqueue, &local->tx_work); | |
ed0a5dce | 99 | } |
5b641ebe | 100 | |
101 | return NETDEV_TX_OK; | |
f5588912 VB |
102 | |
103 | err_tx: | |
104 | kfree_skb(skb); | |
105 | return NETDEV_TX_OK; | |
5b641ebe | 106 | } |
50c6fb99 | 107 | |
e5e584fc AA |
108 | netdev_tx_t |
109 | ieee802154_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
50c6fb99 AA |
110 | { |
111 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); | |
50c6fb99 AA |
112 | |
113 | skb->skb_iif = dev->ifindex; | |
50c6fb99 | 114 | |
e5e584fc | 115 | return ieee802154_tx(sdata->local, skb); |
50c6fb99 AA |
116 | } |
117 | ||
e5e584fc AA |
118 | netdev_tx_t |
119 | ieee802154_subif_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
50c6fb99 AA |
120 | { |
121 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); | |
50c6fb99 AA |
122 | int rc; |
123 | ||
50c6fb99 AA |
124 | rc = mac802154_llsec_encrypt(&sdata->sec, skb); |
125 | if (rc) { | |
cfa626cb | 126 | netdev_warn(dev, "encryption failed: %i\n", rc); |
50c6fb99 AA |
127 | kfree_skb(skb); |
128 | return NETDEV_TX_OK; | |
129 | } | |
130 | ||
131 | skb->skb_iif = dev->ifindex; | |
50c6fb99 | 132 | |
e5e584fc | 133 | return ieee802154_tx(sdata->local, skb); |
50c6fb99 | 134 | } |