1
2
3
4#include <linux/hardirq.h>
5#include <linux/netdevice.h>
6#include <linux/etherdevice.h>
7#include <linux/sched.h>
8#include <linux/export.h>
9#include <net/cfg80211.h>
10
11#include "host.h"
12#include "radiotap.h"
13#include "decl.h"
14#include "defs.h"
15#include "dev.h"
16#include "mesh.h"
17
18
19
20
21
22
23
24
25static u32 convert_radiotap_rate_to_mv(u8 rate)
26{
27 switch (rate) {
28 case 2:
29 return 0 | (1 << 4);
30 case 4:
31 return 1 | (1 << 4);
32 case 11:
33 return 2 | (1 << 4);
34 case 22:
35 return 3 | (1 << 4);
36 case 12:
37 return 4 | (1 << 4);
38 case 18:
39 return 5 | (1 << 4);
40 case 24:
41 return 6 | (1 << 4);
42 case 36:
43 return 7 | (1 << 4);
44 case 48:
45 return 8 | (1 << 4);
46 case 72:
47 return 9 | (1 << 4);
48 case 96:
49 return 10 | (1 << 4);
50 case 108:
51 return 11 | (1 << 4);
52 }
53 return 0;
54}
55
56
57
58
59
60
61
62
63
64netdev_tx_t lbs_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
65{
66 unsigned long flags;
67 struct lbs_private *priv = dev->ml_priv;
68 struct txpd *txpd;
69 char *p802x_hdr;
70 uint16_t pkt_len;
71 netdev_tx_t ret = NETDEV_TX_OK;
72
73
74
75 spin_lock_irqsave(&priv->driver_lock, flags);
76
77 if (priv->surpriseremoved)
78 goto free;
79
80 if (!skb->len || (skb->len > MRVDRV_ETH_TX_PACKET_BUFFER_SIZE)) {
81 lbs_deb_tx("tx err: skb length %d 0 or > %zd\n",
82 skb->len, MRVDRV_ETH_TX_PACKET_BUFFER_SIZE);
83
84
85 dev->stats.tx_dropped++;
86 dev->stats.tx_errors++;
87 goto free;
88 }
89
90
91 netif_stop_queue(priv->dev);
92 if (priv->mesh_dev)
93 netif_stop_queue(priv->mesh_dev);
94
95 if (priv->tx_pending_len) {
96
97
98
99 lbs_deb_tx("Packet on %s while busy\n", dev->name);
100 ret = NETDEV_TX_BUSY;
101 goto unlock;
102 }
103
104 priv->tx_pending_len = -1;
105 spin_unlock_irqrestore(&priv->driver_lock, flags);
106
107 lbs_deb_hex(LBS_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100));
108
109 txpd = (void *)priv->tx_pending_buf;
110 memset(txpd, 0, sizeof(struct txpd));
111
112 p802x_hdr = skb->data;
113 pkt_len = skb->len;
114
115 if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) {
116 struct tx_radiotap_hdr *rtap_hdr = (void *)skb->data;
117
118
119 txpd->tx_control = cpu_to_le32(convert_radiotap_rate_to_mv(rtap_hdr->rate));
120
121
122 p802x_hdr += sizeof(*rtap_hdr);
123 pkt_len -= sizeof(*rtap_hdr);
124
125
126 memcpy(txpd->tx_dest_addr_high, p802x_hdr + 4, ETH_ALEN);
127 } else {
128
129 memcpy(txpd->tx_dest_addr_high, p802x_hdr, ETH_ALEN);
130 }
131
132 txpd->tx_packet_length = cpu_to_le16(pkt_len);
133 txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd));
134
135 lbs_mesh_set_txpd(priv, dev, txpd);
136
137 lbs_deb_hex(LBS_DEB_TX, "txpd", (u8 *) &txpd, sizeof(struct txpd));
138
139 lbs_deb_hex(LBS_DEB_TX, "Tx Data", (u8 *) p802x_hdr, le16_to_cpu(txpd->tx_packet_length));
140
141 memcpy(&txpd[1], p802x_hdr, le16_to_cpu(txpd->tx_packet_length));
142
143 spin_lock_irqsave(&priv->driver_lock, flags);
144 priv->tx_pending_len = pkt_len + sizeof(struct txpd);
145
146 lbs_deb_tx("%s lined up packet\n", __func__);
147
148 dev->stats.tx_packets++;
149 dev->stats.tx_bytes += skb->len;
150
151 if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) {
152
153
154 skb_orphan(skb);
155
156
157 priv->currenttxskb = skb;
158 } else {
159 free:
160 dev_kfree_skb_any(skb);
161 }
162
163 unlock:
164 spin_unlock_irqrestore(&priv->driver_lock, flags);
165 wake_up(&priv->waitq);
166
167 return ret;
168}
169
170
171
172
173
174
175
176
177
178
179void lbs_send_tx_feedback(struct lbs_private *priv, u32 try_count)
180{
181 struct tx_radiotap_hdr *radiotap_hdr;
182
183 if (priv->wdev->iftype != NL80211_IFTYPE_MONITOR ||
184 priv->currenttxskb == NULL)
185 return;
186
187 radiotap_hdr = (struct tx_radiotap_hdr *)priv->currenttxskb->data;
188
189 radiotap_hdr->data_retries = try_count ?
190 (1 + priv->txretrycount - try_count) : 0;
191
192 priv->currenttxskb->protocol = eth_type_trans(priv->currenttxskb,
193 priv->dev);
194 netif_rx(priv->currenttxskb);
195
196 priv->currenttxskb = NULL;
197
198 if (priv->connect_status == LBS_CONNECTED)
199 netif_wake_queue(priv->dev);
200
201 if (priv->mesh_dev && netif_running(priv->mesh_dev))
202 netif_wake_queue(priv->mesh_dev);
203}
204EXPORT_SYMBOL_GPL(lbs_send_tx_feedback);
205