This source file includes following definitions.
- ieee802154_xmit_worker
- ieee802154_tx
- ieee802154_monitor_start_xmit
- ieee802154_subif_start_xmit
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12 #include <linux/netdevice.h>
13 #include <linux/if_arp.h>
14 #include <linux/crc-ccitt.h>
15 #include <asm/unaligned.h>
16
17 #include <net/rtnetlink.h>
18 #include <net/ieee802154_netdev.h>
19 #include <net/mac802154.h>
20 #include <net/cfg802154.h>
21
22 #include "ieee802154_i.h"
23 #include "driver-ops.h"
24
25 void ieee802154_xmit_worker(struct work_struct *work)
26 {
27 struct ieee802154_local *local =
28 container_of(work, struct ieee802154_local, tx_work);
29 struct sk_buff *skb = local->tx_skb;
30 struct net_device *dev = skb->dev;
31 int res;
32
33 res = drv_xmit_sync(local, skb);
34 if (res)
35 goto err_tx;
36
37 ieee802154_xmit_complete(&local->hw, skb, false);
38
39 dev->stats.tx_packets++;
40 dev->stats.tx_bytes += skb->len;
41
42 return;
43
44 err_tx:
45
46 ieee802154_wake_queue(&local->hw);
47 kfree_skb(skb);
48 netdev_dbg(dev, "transmission failed\n");
49 }
50
51 static netdev_tx_t
52 ieee802154_tx(struct ieee802154_local *local, struct sk_buff *skb)
53 {
54 struct net_device *dev = skb->dev;
55 int ret;
56
57 if (!(local->hw.flags & IEEE802154_HW_TX_OMIT_CKSUM)) {
58 struct sk_buff *nskb;
59 u16 crc;
60
61 if (unlikely(skb_tailroom(skb) < IEEE802154_FCS_LEN)) {
62 nskb = skb_copy_expand(skb, 0, IEEE802154_FCS_LEN,
63 GFP_ATOMIC);
64 if (likely(nskb)) {
65 consume_skb(skb);
66 skb = nskb;
67 } else {
68 goto err_tx;
69 }
70 }
71
72 crc = crc_ccitt(0, skb->data, skb->len);
73 put_unaligned_le16(crc, skb_put(skb, 2));
74 }
75
76
77 ieee802154_stop_queue(&local->hw);
78
79
80 if (local->ops->xmit_async) {
81 ret = drv_xmit_async(local, skb);
82 if (ret) {
83 ieee802154_wake_queue(&local->hw);
84 goto err_tx;
85 }
86
87 dev->stats.tx_packets++;
88 dev->stats.tx_bytes += skb->len;
89 } else {
90 local->tx_skb = skb;
91 queue_work(local->workqueue, &local->tx_work);
92 }
93
94 return NETDEV_TX_OK;
95
96 err_tx:
97 kfree_skb(skb);
98 return NETDEV_TX_OK;
99 }
100
101 netdev_tx_t
102 ieee802154_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev)
103 {
104 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
105
106 skb->skb_iif = dev->ifindex;
107
108 return ieee802154_tx(sdata->local, skb);
109 }
110
111 netdev_tx_t
112 ieee802154_subif_start_xmit(struct sk_buff *skb, struct net_device *dev)
113 {
114 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
115 int rc;
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121 rc = mac802154_llsec_encrypt(&sdata->sec, skb);
122 if (rc) {
123 netdev_warn(dev, "encryption failed: %i\n", rc);
124 kfree_skb(skb);
125 return NETDEV_TX_OK;
126 }
127
128 skb->skb_iif = dev->ifindex;
129
130 return ieee802154_tx(sdata->local, skb);
131 }