Commit | Line | Data |
---|---|---|
8973a6e7 RD |
1 | /* |
2 | * This file contains the handling of TX in wlan driver. | |
3 | */ | |
a6b7a407 | 4 | #include <linux/hardirq.h> |
876c9d3a | 5 | #include <linux/netdevice.h> |
6f93a8e7 | 6 | #include <linux/etherdevice.h> |
d43c36dc | 7 | #include <linux/sched.h> |
e86dc1ca | 8 | #include <net/cfg80211.h> |
876c9d3a | 9 | |
9e66e701 | 10 | #include "host.h" |
876c9d3a | 11 | #include "radiotap.h" |
876c9d3a MT |
12 | #include "decl.h" |
13 | #include "defs.h" | |
14 | #include "dev.h" | |
876c9d3a MT |
15 | |
16 | /** | |
8973a6e7 RD |
17 | * convert_radiotap_rate_to_mv - converts Tx/Rx rates from IEEE80211_RADIOTAP_RATE |
18 | * units (500 Kb/s) into Marvell WLAN format (see Table 8 in Section 3.2.1) | |
876c9d3a | 19 | * |
8973a6e7 RD |
20 | * @rate: Input rate |
21 | * returns: Output Rate (0 if invalid) | |
876c9d3a MT |
22 | */ |
23 | static u32 convert_radiotap_rate_to_mv(u8 rate) | |
24 | { | |
25 | switch (rate) { | |
26 | case 2: /* 1 Mbps */ | |
27 | return 0 | (1 << 4); | |
28 | case 4: /* 2 Mbps */ | |
29 | return 1 | (1 << 4); | |
30 | case 11: /* 5.5 Mbps */ | |
31 | return 2 | (1 << 4); | |
32 | case 22: /* 11 Mbps */ | |
33 | return 3 | (1 << 4); | |
34 | case 12: /* 6 Mbps */ | |
35 | return 4 | (1 << 4); | |
36 | case 18: /* 9 Mbps */ | |
37 | return 5 | (1 << 4); | |
38 | case 24: /* 12 Mbps */ | |
39 | return 6 | (1 << 4); | |
40 | case 36: /* 18 Mbps */ | |
41 | return 7 | (1 << 4); | |
42 | case 48: /* 24 Mbps */ | |
43 | return 8 | (1 << 4); | |
44 | case 72: /* 36 Mbps */ | |
45 | return 9 | (1 << 4); | |
46 | case 96: /* 48 Mbps */ | |
47 | return 10 | (1 << 4); | |
48 | case 108: /* 54 Mbps */ | |
49 | return 11 | (1 << 4); | |
50 | } | |
51 | return 0; | |
52 | } | |
53 | ||
54 | /** | |
8973a6e7 RD |
55 | * lbs_hard_start_xmit - checks the conditions and sends packet to IF |
56 | * layer if everything is ok | |
876c9d3a | 57 | * |
8973a6e7 RD |
58 | * @skb: A pointer to skb which includes TX packet |
59 | * @dev: A pointer to the &struct net_device | |
60 | * returns: 0 or -1 | |
876c9d3a | 61 | */ |
d0cf9c0d | 62 | netdev_tx_t lbs_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) |
876c9d3a | 63 | { |
a2b62dc1 | 64 | unsigned long flags; |
ab65f649 | 65 | struct lbs_private *priv = dev->ml_priv; |
a2b62dc1 DW |
66 | struct txpd *txpd; |
67 | char *p802x_hdr; | |
68 | uint16_t pkt_len; | |
d0cf9c0d | 69 | netdev_tx_t ret = NETDEV_TX_OK; |
876c9d3a | 70 | |
9012b28a | 71 | lbs_deb_enter(LBS_DEB_TX); |
876c9d3a | 72 | |
2eb188a1 DW |
73 | /* We need to protect against the queues being restarted before |
74 | we get round to stopping them */ | |
75 | spin_lock_irqsave(&priv->driver_lock, flags); | |
6b4a7e0f | 76 | |
aa21c004 | 77 | if (priv->surpriseremoved) |
2eb188a1 | 78 | goto free; |
876c9d3a | 79 | |
876c9d3a | 80 | if (!skb->len || (skb->len > MRVDRV_ETH_TX_PACKET_BUFFER_SIZE)) { |
9012b28a | 81 | lbs_deb_tx("tx err: skb length %d 0 or > %zd\n", |
876c9d3a | 82 | skb->len, MRVDRV_ETH_TX_PACKET_BUFFER_SIZE); |
a2b62dc1 | 83 | /* We'll never manage to send this one; drop it and return 'OK' */ |
2eb188a1 | 84 | |
bbfc6b78 SH |
85 | dev->stats.tx_dropped++; |
86 | dev->stats.tx_errors++; | |
2eb188a1 DW |
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) { | |
7e226272 DW |
96 | /* This can happen if packets come in on the mesh and eth |
97 | device simultaneously -- there's no mutual exclusion on | |
2eb188a1 DW |
98 | hard_start_xmit() calls between devices. */ |
99 | lbs_deb_tx("Packet on %s while busy\n", dev->name); | |
100 | ret = NETDEV_TX_BUSY; | |
101 | goto unlock; | |
876c9d3a MT |
102 | } |
103 | ||
2eb188a1 DW |
104 | priv->tx_pending_len = -1; |
105 | spin_unlock_irqrestore(&priv->driver_lock, flags); | |
106 | ||
a2b62dc1 | 107 | lbs_deb_hex(LBS_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100)); |
876c9d3a | 108 | |
2eb188a1 | 109 | txpd = (void *)priv->tx_pending_buf; |
a2b62dc1 | 110 | memset(txpd, 0, sizeof(struct txpd)); |
876c9d3a | 111 | |
876c9d3a | 112 | p802x_hdr = skb->data; |
a2b62dc1 | 113 | pkt_len = skb->len; |
876c9d3a | 114 | |
e86dc1ca | 115 | if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) { |
a2b62dc1 | 116 | struct tx_radiotap_hdr *rtap_hdr = (void *)skb->data; |
876c9d3a MT |
117 | |
118 | /* set txpd fields from the radiotap header */ | |
a2b62dc1 | 119 | txpd->tx_control = cpu_to_le32(convert_radiotap_rate_to_mv(rtap_hdr->rate)); |
876c9d3a MT |
120 | |
121 | /* skip the radiotap header */ | |
a2b62dc1 DW |
122 | p802x_hdr += sizeof(*rtap_hdr); |
123 | pkt_len -= sizeof(*rtap_hdr); | |
876c9d3a | 124 | |
a2b62dc1 DW |
125 | /* copy destination address from 802.11 header */ |
126 | memcpy(txpd->tx_dest_addr_high, p802x_hdr + 4, ETH_ALEN); | |
127 | } else { | |
128 | /* copy destination address from 802.3 header */ | |
129 | memcpy(txpd->tx_dest_addr_high, p802x_hdr, ETH_ALEN); | |
876c9d3a | 130 | } |
876c9d3a | 131 | |
a2b62dc1 DW |
132 | txpd->tx_packet_length = cpu_to_le16(pkt_len); |
133 | txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd)); | |
876c9d3a | 134 | |
e0e42da3 | 135 | lbs_mesh_set_txpd(priv, dev, txpd); |
876c9d3a | 136 | |
a2b62dc1 | 137 | lbs_deb_hex(LBS_DEB_TX, "txpd", (u8 *) &txpd, sizeof(struct txpd)); |
876c9d3a | 138 | |
a2b62dc1 | 139 | lbs_deb_hex(LBS_DEB_TX, "Tx Data", (u8 *) p802x_hdr, le16_to_cpu(txpd->tx_packet_length)); |
876c9d3a | 140 | |
a2b62dc1 | 141 | memcpy(&txpd[1], p802x_hdr, le16_to_cpu(txpd->tx_packet_length)); |
876c9d3a | 142 | |
a2b62dc1 | 143 | spin_lock_irqsave(&priv->driver_lock, flags); |
2eb188a1 | 144 | priv->tx_pending_len = pkt_len + sizeof(struct txpd); |
876c9d3a | 145 | |
2eb188a1 | 146 | lbs_deb_tx("%s lined up packet\n", __func__); |
a2b62dc1 | 147 | |
bbfc6b78 SH |
148 | dev->stats.tx_packets++; |
149 | dev->stats.tx_bytes += skb->len; | |
a2b62dc1 | 150 | |
e86dc1ca | 151 | if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) { |
2eb188a1 DW |
152 | /* Keep the skb to echo it back once Tx feedback is |
153 | received from FW */ | |
154 | skb_orphan(skb); | |
f86a93e1 | 155 | |
2eb188a1 DW |
156 | /* Keep the skb around for when we get feedback */ |
157 | priv->currenttxskb = skb; | |
158 | } else { | |
159 | free: | |
876c9d3a | 160 | dev_kfree_skb_any(skb); |
876c9d3a | 161 | } |
e86dc1ca | 162 | |
2eb188a1 DW |
163 | unlock: |
164 | spin_unlock_irqrestore(&priv->driver_lock, flags); | |
165 | wake_up(&priv->waitq); | |
876c9d3a | 166 | |
9012b28a | 167 | lbs_deb_leave_args(LBS_DEB_TX, "ret %d", ret); |
876c9d3a MT |
168 | return ret; |
169 | } | |
170 | ||
171 | /** | |
8973a6e7 RD |
172 | * lbs_send_tx_feedback - sends to the host the last transmitted packet, |
173 | * filling the radiotap headers with transmission information. | |
876c9d3a | 174 | * |
8973a6e7 RD |
175 | * @priv: A pointer to &struct lbs_private structure |
176 | * @try_count: A 32-bit value containing transmission retry status. | |
876c9d3a | 177 | * |
8973a6e7 | 178 | * returns: void |
876c9d3a | 179 | */ |
7919b89c | 180 | void lbs_send_tx_feedback(struct lbs_private *priv, u32 try_count) |
876c9d3a | 181 | { |
876c9d3a | 182 | struct tx_radiotap_hdr *radiotap_hdr; |
876c9d3a | 183 | |
bd75eb85 | 184 | if (priv->wdev->iftype != NL80211_IFTYPE_MONITOR || |
e86dc1ca | 185 | priv->currenttxskb == NULL) |
876c9d3a MT |
186 | return; |
187 | ||
aa21c004 | 188 | radiotap_hdr = (struct tx_radiotap_hdr *)priv->currenttxskb->data; |
876c9d3a | 189 | |
7919b89c HS |
190 | radiotap_hdr->data_retries = try_count ? |
191 | (1 + priv->txretrycount - try_count) : 0; | |
6f93a8e7 DW |
192 | |
193 | priv->currenttxskb->protocol = eth_type_trans(priv->currenttxskb, | |
e86dc1ca | 194 | priv->dev); |
6f93a8e7 DW |
195 | netif_rx(priv->currenttxskb); |
196 | ||
aa21c004 | 197 | priv->currenttxskb = NULL; |
01d77d8d | 198 | |
aa21c004 | 199 | if (priv->connect_status == LBS_CONNECTED) |
634b8f49 | 200 | netif_wake_queue(priv->dev); |
01d77d8d | 201 | |
602114ae | 202 | if (priv->mesh_dev && lbs_mesh_connected(priv)) |
01d77d8d | 203 | netif_wake_queue(priv->mesh_dev); |
876c9d3a | 204 | } |
10078321 | 205 | EXPORT_SYMBOL_GPL(lbs_send_tx_feedback); |