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Commit | Line | Data |
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876c9d3a MT |
1 | /** |
2 | * This file contains the handling of TX in wlan driver. | |
3 | */ | |
4 | #include <linux/netdevice.h> | |
6f93a8e7 | 5 | #include <linux/etherdevice.h> |
d43c36dc | 6 | #include <linux/sched.h> |
e86dc1ca | 7 | #include <net/cfg80211.h> |
876c9d3a | 8 | |
9e66e701 | 9 | #include "host.h" |
876c9d3a | 10 | #include "radiotap.h" |
876c9d3a MT |
11 | #include "decl.h" |
12 | #include "defs.h" | |
13 | #include "dev.h" | |
876c9d3a MT |
14 | |
15 | /** | |
16 | * @brief This function converts Tx/Rx rates from IEEE80211_RADIOTAP_RATE | |
17 | * units (500 Kb/s) into Marvell WLAN format (see Table 8 in Section 3.2.1) | |
18 | * | |
19 | * @param rate Input rate | |
20 | * @return Output Rate (0 if invalid) | |
21 | */ | |
22 | static u32 convert_radiotap_rate_to_mv(u8 rate) | |
23 | { | |
24 | switch (rate) { | |
25 | case 2: /* 1 Mbps */ | |
26 | return 0 | (1 << 4); | |
27 | case 4: /* 2 Mbps */ | |
28 | return 1 | (1 << 4); | |
29 | case 11: /* 5.5 Mbps */ | |
30 | return 2 | (1 << 4); | |
31 | case 22: /* 11 Mbps */ | |
32 | return 3 | (1 << 4); | |
33 | case 12: /* 6 Mbps */ | |
34 | return 4 | (1 << 4); | |
35 | case 18: /* 9 Mbps */ | |
36 | return 5 | (1 << 4); | |
37 | case 24: /* 12 Mbps */ | |
38 | return 6 | (1 << 4); | |
39 | case 36: /* 18 Mbps */ | |
40 | return 7 | (1 << 4); | |
41 | case 48: /* 24 Mbps */ | |
42 | return 8 | (1 << 4); | |
43 | case 72: /* 36 Mbps */ | |
44 | return 9 | (1 << 4); | |
45 | case 96: /* 48 Mbps */ | |
46 | return 10 | (1 << 4); | |
47 | case 108: /* 54 Mbps */ | |
48 | return 11 | (1 << 4); | |
49 | } | |
50 | return 0; | |
51 | } | |
52 | ||
53 | /** | |
6b4a7e0f DW |
54 | * @brief This function checks the conditions and sends packet to IF |
55 | * layer if everything is ok. | |
876c9d3a | 56 | * |
69f9032d | 57 | * @param priv A pointer to struct lbs_private structure |
876c9d3a MT |
58 | * @param skb A pointer to skb which includes TX packet |
59 | * @return 0 or -1 | |
60 | */ | |
d0cf9c0d | 61 | netdev_tx_t lbs_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) |
876c9d3a | 62 | { |
a2b62dc1 | 63 | unsigned long flags; |
ab65f649 | 64 | struct lbs_private *priv = dev->ml_priv; |
a2b62dc1 DW |
65 | struct txpd *txpd; |
66 | char *p802x_hdr; | |
67 | uint16_t pkt_len; | |
d0cf9c0d | 68 | netdev_tx_t ret = NETDEV_TX_OK; |
876c9d3a | 69 | |
9012b28a | 70 | lbs_deb_enter(LBS_DEB_TX); |
876c9d3a | 71 | |
2eb188a1 DW |
72 | /* We need to protect against the queues being restarted before |
73 | we get round to stopping them */ | |
74 | spin_lock_irqsave(&priv->driver_lock, flags); | |
6b4a7e0f | 75 | |
aa21c004 | 76 | if (priv->surpriseremoved) |
2eb188a1 | 77 | goto free; |
876c9d3a | 78 | |
876c9d3a | 79 | if (!skb->len || (skb->len > MRVDRV_ETH_TX_PACKET_BUFFER_SIZE)) { |
9012b28a | 80 | lbs_deb_tx("tx err: skb length %d 0 or > %zd\n", |
876c9d3a | 81 | skb->len, MRVDRV_ETH_TX_PACKET_BUFFER_SIZE); |
a2b62dc1 | 82 | /* We'll never manage to send this one; drop it and return 'OK' */ |
2eb188a1 | 83 | |
bbfc6b78 SH |
84 | dev->stats.tx_dropped++; |
85 | dev->stats.tx_errors++; | |
2eb188a1 DW |
86 | goto free; |
87 | } | |
88 | ||
89 | ||
90 | netif_stop_queue(priv->dev); | |
91 | if (priv->mesh_dev) | |
92 | netif_stop_queue(priv->mesh_dev); | |
93 | ||
94 | if (priv->tx_pending_len) { | |
7e226272 DW |
95 | /* This can happen if packets come in on the mesh and eth |
96 | device simultaneously -- there's no mutual exclusion on | |
2eb188a1 DW |
97 | hard_start_xmit() calls between devices. */ |
98 | lbs_deb_tx("Packet on %s while busy\n", dev->name); | |
99 | ret = NETDEV_TX_BUSY; | |
100 | goto unlock; | |
876c9d3a MT |
101 | } |
102 | ||
2eb188a1 DW |
103 | priv->tx_pending_len = -1; |
104 | spin_unlock_irqrestore(&priv->driver_lock, flags); | |
105 | ||
a2b62dc1 | 106 | lbs_deb_hex(LBS_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100)); |
876c9d3a | 107 | |
2eb188a1 | 108 | txpd = (void *)priv->tx_pending_buf; |
a2b62dc1 | 109 | memset(txpd, 0, sizeof(struct txpd)); |
876c9d3a | 110 | |
876c9d3a | 111 | p802x_hdr = skb->data; |
a2b62dc1 | 112 | pkt_len = skb->len; |
876c9d3a | 113 | |
e86dc1ca | 114 | if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) { |
a2b62dc1 | 115 | struct tx_radiotap_hdr *rtap_hdr = (void *)skb->data; |
876c9d3a MT |
116 | |
117 | /* set txpd fields from the radiotap header */ | |
a2b62dc1 | 118 | txpd->tx_control = cpu_to_le32(convert_radiotap_rate_to_mv(rtap_hdr->rate)); |
876c9d3a MT |
119 | |
120 | /* skip the radiotap header */ | |
a2b62dc1 DW |
121 | p802x_hdr += sizeof(*rtap_hdr); |
122 | pkt_len -= sizeof(*rtap_hdr); | |
876c9d3a | 123 | |
a2b62dc1 DW |
124 | /* copy destination address from 802.11 header */ |
125 | memcpy(txpd->tx_dest_addr_high, p802x_hdr + 4, ETH_ALEN); | |
126 | } else { | |
127 | /* copy destination address from 802.3 header */ | |
128 | memcpy(txpd->tx_dest_addr_high, p802x_hdr, ETH_ALEN); | |
876c9d3a | 129 | } |
876c9d3a | 130 | |
a2b62dc1 DW |
131 | txpd->tx_packet_length = cpu_to_le16(pkt_len); |
132 | txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd)); | |
876c9d3a | 133 | |
e0e42da3 | 134 | lbs_mesh_set_txpd(priv, dev, txpd); |
876c9d3a | 135 | |
a2b62dc1 | 136 | lbs_deb_hex(LBS_DEB_TX, "txpd", (u8 *) &txpd, sizeof(struct txpd)); |
876c9d3a | 137 | |
a2b62dc1 | 138 | lbs_deb_hex(LBS_DEB_TX, "Tx Data", (u8 *) p802x_hdr, le16_to_cpu(txpd->tx_packet_length)); |
876c9d3a | 139 | |
a2b62dc1 | 140 | memcpy(&txpd[1], p802x_hdr, le16_to_cpu(txpd->tx_packet_length)); |
876c9d3a | 141 | |
a2b62dc1 | 142 | spin_lock_irqsave(&priv->driver_lock, flags); |
2eb188a1 | 143 | priv->tx_pending_len = pkt_len + sizeof(struct txpd); |
876c9d3a | 144 | |
2eb188a1 | 145 | lbs_deb_tx("%s lined up packet\n", __func__); |
a2b62dc1 | 146 | |
bbfc6b78 SH |
147 | dev->stats.tx_packets++; |
148 | dev->stats.tx_bytes += skb->len; | |
a2b62dc1 | 149 | |
e86dc1ca | 150 | if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) { |
2eb188a1 DW |
151 | /* Keep the skb to echo it back once Tx feedback is |
152 | received from FW */ | |
153 | skb_orphan(skb); | |
f86a93e1 | 154 | |
2eb188a1 DW |
155 | /* Keep the skb around for when we get feedback */ |
156 | priv->currenttxskb = skb; | |
157 | } else { | |
158 | free: | |
876c9d3a | 159 | dev_kfree_skb_any(skb); |
876c9d3a | 160 | } |
e86dc1ca | 161 | |
2eb188a1 DW |
162 | unlock: |
163 | spin_unlock_irqrestore(&priv->driver_lock, flags); | |
164 | wake_up(&priv->waitq); | |
876c9d3a | 165 | |
9012b28a | 166 | lbs_deb_leave_args(LBS_DEB_TX, "ret %d", ret); |
876c9d3a MT |
167 | return ret; |
168 | } | |
169 | ||
170 | /** | |
171 | * @brief This function sends to the host the last transmitted packet, | |
172 | * filling the radiotap headers with transmission information. | |
173 | * | |
69f9032d | 174 | * @param priv A pointer to struct lbs_private structure |
876c9d3a MT |
175 | * @param status A 32 bit value containing transmission status. |
176 | * | |
177 | * @returns void | |
178 | */ | |
7919b89c | 179 | void lbs_send_tx_feedback(struct lbs_private *priv, u32 try_count) |
876c9d3a | 180 | { |
876c9d3a | 181 | struct tx_radiotap_hdr *radiotap_hdr; |
876c9d3a | 182 | |
bd75eb85 | 183 | if (priv->wdev->iftype != NL80211_IFTYPE_MONITOR || |
e86dc1ca | 184 | priv->currenttxskb == NULL) |
876c9d3a MT |
185 | return; |
186 | ||
aa21c004 | 187 | radiotap_hdr = (struct tx_radiotap_hdr *)priv->currenttxskb->data; |
876c9d3a | 188 | |
7919b89c HS |
189 | radiotap_hdr->data_retries = try_count ? |
190 | (1 + priv->txretrycount - try_count) : 0; | |
6f93a8e7 DW |
191 | |
192 | priv->currenttxskb->protocol = eth_type_trans(priv->currenttxskb, | |
e86dc1ca | 193 | priv->dev); |
6f93a8e7 DW |
194 | netif_rx(priv->currenttxskb); |
195 | ||
aa21c004 | 196 | priv->currenttxskb = NULL; |
01d77d8d | 197 | |
aa21c004 | 198 | if (priv->connect_status == LBS_CONNECTED) |
634b8f49 | 199 | netif_wake_queue(priv->dev); |
01d77d8d | 200 | |
602114ae | 201 | if (priv->mesh_dev && lbs_mesh_connected(priv)) |
01d77d8d | 202 | netif_wake_queue(priv->mesh_dev); |
876c9d3a | 203 | } |
10078321 | 204 | EXPORT_SYMBOL_GPL(lbs_send_tx_feedback); |