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> |
ee40fa06 | 8 | #include <linux/export.h> |
e86dc1ca | 9 | #include <net/cfg80211.h> |
876c9d3a | 10 | |
9e66e701 | 11 | #include "host.h" |
876c9d3a | 12 | #include "radiotap.h" |
876c9d3a MT |
13 | #include "decl.h" |
14 | #include "defs.h" | |
15 | #include "dev.h" | |
49fee692 | 16 | #include "mesh.h" |
876c9d3a MT |
17 | |
18 | /** | |
8973a6e7 RD |
19 | * convert_radiotap_rate_to_mv - converts Tx/Rx rates from IEEE80211_RADIOTAP_RATE |
20 | * units (500 Kb/s) into Marvell WLAN format (see Table 8 in Section 3.2.1) | |
876c9d3a | 21 | * |
8973a6e7 RD |
22 | * @rate: Input rate |
23 | * returns: Output Rate (0 if invalid) | |
876c9d3a MT |
24 | */ |
25 | static u32 convert_radiotap_rate_to_mv(u8 rate) | |
26 | { | |
27 | switch (rate) { | |
28 | case 2: /* 1 Mbps */ | |
29 | return 0 | (1 << 4); | |
30 | case 4: /* 2 Mbps */ | |
31 | return 1 | (1 << 4); | |
32 | case 11: /* 5.5 Mbps */ | |
33 | return 2 | (1 << 4); | |
34 | case 22: /* 11 Mbps */ | |
35 | return 3 | (1 << 4); | |
36 | case 12: /* 6 Mbps */ | |
37 | return 4 | (1 << 4); | |
38 | case 18: /* 9 Mbps */ | |
39 | return 5 | (1 << 4); | |
40 | case 24: /* 12 Mbps */ | |
41 | return 6 | (1 << 4); | |
42 | case 36: /* 18 Mbps */ | |
43 | return 7 | (1 << 4); | |
44 | case 48: /* 24 Mbps */ | |
45 | return 8 | (1 << 4); | |
46 | case 72: /* 36 Mbps */ | |
47 | return 9 | (1 << 4); | |
48 | case 96: /* 48 Mbps */ | |
49 | return 10 | (1 << 4); | |
50 | case 108: /* 54 Mbps */ | |
51 | return 11 | (1 << 4); | |
52 | } | |
53 | return 0; | |
54 | } | |
55 | ||
56 | /** | |
8973a6e7 RD |
57 | * lbs_hard_start_xmit - checks the conditions and sends packet to IF |
58 | * layer if everything is ok | |
876c9d3a | 59 | * |
8973a6e7 RD |
60 | * @skb: A pointer to skb which includes TX packet |
61 | * @dev: A pointer to the &struct net_device | |
62 | * returns: 0 or -1 | |
876c9d3a | 63 | */ |
d0cf9c0d | 64 | netdev_tx_t lbs_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) |
876c9d3a | 65 | { |
a2b62dc1 | 66 | unsigned long flags; |
ab65f649 | 67 | struct lbs_private *priv = dev->ml_priv; |
a2b62dc1 DW |
68 | struct txpd *txpd; |
69 | char *p802x_hdr; | |
70 | uint16_t pkt_len; | |
d0cf9c0d | 71 | netdev_tx_t ret = NETDEV_TX_OK; |
876c9d3a | 72 | |
9012b28a | 73 | lbs_deb_enter(LBS_DEB_TX); |
876c9d3a | 74 | |
2eb188a1 DW |
75 | /* We need to protect against the queues being restarted before |
76 | we get round to stopping them */ | |
77 | spin_lock_irqsave(&priv->driver_lock, flags); | |
6b4a7e0f | 78 | |
aa21c004 | 79 | if (priv->surpriseremoved) |
2eb188a1 | 80 | goto free; |
876c9d3a | 81 | |
876c9d3a | 82 | if (!skb->len || (skb->len > MRVDRV_ETH_TX_PACKET_BUFFER_SIZE)) { |
9012b28a | 83 | lbs_deb_tx("tx err: skb length %d 0 or > %zd\n", |
876c9d3a | 84 | skb->len, MRVDRV_ETH_TX_PACKET_BUFFER_SIZE); |
a2b62dc1 | 85 | /* We'll never manage to send this one; drop it and return 'OK' */ |
2eb188a1 | 86 | |
bbfc6b78 SH |
87 | dev->stats.tx_dropped++; |
88 | dev->stats.tx_errors++; | |
2eb188a1 DW |
89 | goto free; |
90 | } | |
91 | ||
92 | ||
93 | netif_stop_queue(priv->dev); | |
94 | if (priv->mesh_dev) | |
95 | netif_stop_queue(priv->mesh_dev); | |
96 | ||
97 | if (priv->tx_pending_len) { | |
7e226272 DW |
98 | /* This can happen if packets come in on the mesh and eth |
99 | device simultaneously -- there's no mutual exclusion on | |
2eb188a1 DW |
100 | hard_start_xmit() calls between devices. */ |
101 | lbs_deb_tx("Packet on %s while busy\n", dev->name); | |
102 | ret = NETDEV_TX_BUSY; | |
103 | goto unlock; | |
876c9d3a MT |
104 | } |
105 | ||
2eb188a1 DW |
106 | priv->tx_pending_len = -1; |
107 | spin_unlock_irqrestore(&priv->driver_lock, flags); | |
108 | ||
a2b62dc1 | 109 | lbs_deb_hex(LBS_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100)); |
876c9d3a | 110 | |
2eb188a1 | 111 | txpd = (void *)priv->tx_pending_buf; |
a2b62dc1 | 112 | memset(txpd, 0, sizeof(struct txpd)); |
876c9d3a | 113 | |
876c9d3a | 114 | p802x_hdr = skb->data; |
a2b62dc1 | 115 | pkt_len = skb->len; |
876c9d3a | 116 | |
e86dc1ca | 117 | if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) { |
a2b62dc1 | 118 | struct tx_radiotap_hdr *rtap_hdr = (void *)skb->data; |
876c9d3a MT |
119 | |
120 | /* set txpd fields from the radiotap header */ | |
a2b62dc1 | 121 | txpd->tx_control = cpu_to_le32(convert_radiotap_rate_to_mv(rtap_hdr->rate)); |
876c9d3a MT |
122 | |
123 | /* skip the radiotap header */ | |
a2b62dc1 DW |
124 | p802x_hdr += sizeof(*rtap_hdr); |
125 | pkt_len -= sizeof(*rtap_hdr); | |
876c9d3a | 126 | |
a2b62dc1 DW |
127 | /* copy destination address from 802.11 header */ |
128 | memcpy(txpd->tx_dest_addr_high, p802x_hdr + 4, ETH_ALEN); | |
129 | } else { | |
130 | /* copy destination address from 802.3 header */ | |
131 | memcpy(txpd->tx_dest_addr_high, p802x_hdr, ETH_ALEN); | |
876c9d3a | 132 | } |
876c9d3a | 133 | |
a2b62dc1 DW |
134 | txpd->tx_packet_length = cpu_to_le16(pkt_len); |
135 | txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd)); | |
876c9d3a | 136 | |
e0e42da3 | 137 | lbs_mesh_set_txpd(priv, dev, txpd); |
876c9d3a | 138 | |
a2b62dc1 | 139 | lbs_deb_hex(LBS_DEB_TX, "txpd", (u8 *) &txpd, sizeof(struct txpd)); |
876c9d3a | 140 | |
a2b62dc1 | 141 | lbs_deb_hex(LBS_DEB_TX, "Tx Data", (u8 *) p802x_hdr, le16_to_cpu(txpd->tx_packet_length)); |
876c9d3a | 142 | |
a2b62dc1 | 143 | memcpy(&txpd[1], p802x_hdr, le16_to_cpu(txpd->tx_packet_length)); |
876c9d3a | 144 | |
a2b62dc1 | 145 | spin_lock_irqsave(&priv->driver_lock, flags); |
2eb188a1 | 146 | priv->tx_pending_len = pkt_len + sizeof(struct txpd); |
876c9d3a | 147 | |
2eb188a1 | 148 | lbs_deb_tx("%s lined up packet\n", __func__); |
a2b62dc1 | 149 | |
bbfc6b78 SH |
150 | dev->stats.tx_packets++; |
151 | dev->stats.tx_bytes += skb->len; | |
a2b62dc1 | 152 | |
e86dc1ca | 153 | if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) { |
2eb188a1 DW |
154 | /* Keep the skb to echo it back once Tx feedback is |
155 | received from FW */ | |
156 | skb_orphan(skb); | |
f86a93e1 | 157 | |
2eb188a1 DW |
158 | /* Keep the skb around for when we get feedback */ |
159 | priv->currenttxskb = skb; | |
160 | } else { | |
161 | free: | |
876c9d3a | 162 | dev_kfree_skb_any(skb); |
876c9d3a | 163 | } |
e86dc1ca | 164 | |
2eb188a1 DW |
165 | unlock: |
166 | spin_unlock_irqrestore(&priv->driver_lock, flags); | |
167 | wake_up(&priv->waitq); | |
876c9d3a | 168 | |
9012b28a | 169 | lbs_deb_leave_args(LBS_DEB_TX, "ret %d", ret); |
876c9d3a MT |
170 | return ret; |
171 | } | |
172 | ||
173 | /** | |
8973a6e7 RD |
174 | * lbs_send_tx_feedback - sends to the host the last transmitted packet, |
175 | * filling the radiotap headers with transmission information. | |
876c9d3a | 176 | * |
8973a6e7 RD |
177 | * @priv: A pointer to &struct lbs_private structure |
178 | * @try_count: A 32-bit value containing transmission retry status. | |
876c9d3a | 179 | * |
8973a6e7 | 180 | * returns: void |
876c9d3a | 181 | */ |
7919b89c | 182 | void lbs_send_tx_feedback(struct lbs_private *priv, u32 try_count) |
876c9d3a | 183 | { |
876c9d3a | 184 | struct tx_radiotap_hdr *radiotap_hdr; |
876c9d3a | 185 | |
bd75eb85 | 186 | if (priv->wdev->iftype != NL80211_IFTYPE_MONITOR || |
e86dc1ca | 187 | priv->currenttxskb == NULL) |
876c9d3a MT |
188 | return; |
189 | ||
aa21c004 | 190 | radiotap_hdr = (struct tx_radiotap_hdr *)priv->currenttxskb->data; |
876c9d3a | 191 | |
7919b89c HS |
192 | radiotap_hdr->data_retries = try_count ? |
193 | (1 + priv->txretrycount - try_count) : 0; | |
6f93a8e7 DW |
194 | |
195 | priv->currenttxskb->protocol = eth_type_trans(priv->currenttxskb, | |
e86dc1ca | 196 | priv->dev); |
6f93a8e7 DW |
197 | netif_rx(priv->currenttxskb); |
198 | ||
aa21c004 | 199 | priv->currenttxskb = NULL; |
01d77d8d | 200 | |
aa21c004 | 201 | if (priv->connect_status == LBS_CONNECTED) |
634b8f49 | 202 | netif_wake_queue(priv->dev); |
01d77d8d | 203 | |
d9319986 | 204 | if (priv->mesh_dev && netif_running(priv->mesh_dev)) |
01d77d8d | 205 | netif_wake_queue(priv->mesh_dev); |
876c9d3a | 206 | } |
10078321 | 207 | EXPORT_SYMBOL_GPL(lbs_send_tx_feedback); |