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> |
876c9d3a MT |
6 | |
7 | #include "hostcmd.h" | |
8 | #include "radiotap.h" | |
876c9d3a MT |
9 | #include "decl.h" |
10 | #include "defs.h" | |
11 | #include "dev.h" | |
12 | #include "wext.h" | |
13 | ||
14 | /** | |
15 | * @brief This function converts Tx/Rx rates from IEEE80211_RADIOTAP_RATE | |
16 | * units (500 Kb/s) into Marvell WLAN format (see Table 8 in Section 3.2.1) | |
17 | * | |
18 | * @param rate Input rate | |
19 | * @return Output Rate (0 if invalid) | |
20 | */ | |
21 | static u32 convert_radiotap_rate_to_mv(u8 rate) | |
22 | { | |
23 | switch (rate) { | |
24 | case 2: /* 1 Mbps */ | |
25 | return 0 | (1 << 4); | |
26 | case 4: /* 2 Mbps */ | |
27 | return 1 | (1 << 4); | |
28 | case 11: /* 5.5 Mbps */ | |
29 | return 2 | (1 << 4); | |
30 | case 22: /* 11 Mbps */ | |
31 | return 3 | (1 << 4); | |
32 | case 12: /* 6 Mbps */ | |
33 | return 4 | (1 << 4); | |
34 | case 18: /* 9 Mbps */ | |
35 | return 5 | (1 << 4); | |
36 | case 24: /* 12 Mbps */ | |
37 | return 6 | (1 << 4); | |
38 | case 36: /* 18 Mbps */ | |
39 | return 7 | (1 << 4); | |
40 | case 48: /* 24 Mbps */ | |
41 | return 8 | (1 << 4); | |
42 | case 72: /* 36 Mbps */ | |
43 | return 9 | (1 << 4); | |
44 | case 96: /* 48 Mbps */ | |
45 | return 10 | (1 << 4); | |
46 | case 108: /* 54 Mbps */ | |
47 | return 11 | (1 << 4); | |
48 | } | |
49 | return 0; | |
50 | } | |
51 | ||
52 | /** | |
6b4a7e0f DW |
53 | * @brief This function checks the conditions and sends packet to IF |
54 | * layer if everything is ok. | |
876c9d3a | 55 | * |
69f9032d | 56 | * @param priv A pointer to struct lbs_private structure |
876c9d3a MT |
57 | * @param skb A pointer to skb which includes TX packet |
58 | * @return 0 or -1 | |
59 | */ | |
8af23b2f | 60 | int lbs_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) |
876c9d3a | 61 | { |
a2b62dc1 | 62 | unsigned long flags; |
ab65f649 | 63 | struct lbs_private *priv = dev->ml_priv; |
a2b62dc1 DW |
64 | struct txpd *txpd; |
65 | char *p802x_hdr; | |
66 | uint16_t pkt_len; | |
67 | int ret; | |
876c9d3a | 68 | |
9012b28a | 69 | lbs_deb_enter(LBS_DEB_TX); |
876c9d3a | 70 | |
2eb188a1 | 71 | ret = NETDEV_TX_OK; |
8af23b2f | 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 DW |
84 | |
85 | priv->stats.tx_dropped++; | |
86 | priv->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) { | |
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 | |
a97bcfed | 115 | if (dev == priv->rtap_net_dev) { |
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 | |
a2b62dc1 DW |
135 | if (dev == priv->mesh_dev) |
136 | txpd->tx_control |= cpu_to_le32(TxPD_MESH_FRAME); | |
876c9d3a | 137 | |
a2b62dc1 | 138 | lbs_deb_hex(LBS_DEB_TX, "txpd", (u8 *) &txpd, sizeof(struct txpd)); |
876c9d3a | 139 | |
a2b62dc1 | 140 | lbs_deb_hex(LBS_DEB_TX, "Tx Data", (u8 *) p802x_hdr, le16_to_cpu(txpd->tx_packet_length)); |
876c9d3a | 141 | |
a2b62dc1 | 142 | memcpy(&txpd[1], p802x_hdr, le16_to_cpu(txpd->tx_packet_length)); |
876c9d3a | 143 | |
a2b62dc1 | 144 | spin_lock_irqsave(&priv->driver_lock, flags); |
2eb188a1 | 145 | priv->tx_pending_len = pkt_len + sizeof(struct txpd); |
876c9d3a | 146 | |
2eb188a1 | 147 | lbs_deb_tx("%s lined up packet\n", __func__); |
a2b62dc1 | 148 | |
2eb188a1 DW |
149 | priv->stats.tx_packets++; |
150 | priv->stats.tx_bytes += skb->len; | |
a2b62dc1 | 151 | |
2eb188a1 | 152 | dev->trans_start = jiffies; |
876c9d3a | 153 | |
c2b310a7 | 154 | if (priv->monitormode) { |
2eb188a1 DW |
155 | /* Keep the skb to echo it back once Tx feedback is |
156 | received from FW */ | |
157 | skb_orphan(skb); | |
f86a93e1 | 158 | |
2eb188a1 DW |
159 | /* Keep the skb around for when we get feedback */ |
160 | priv->currenttxskb = skb; | |
161 | } else { | |
162 | free: | |
876c9d3a | 163 | dev_kfree_skb_any(skb); |
876c9d3a | 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 | /** | |
174 | * @brief This function sends to the host the last transmitted packet, | |
175 | * filling the radiotap headers with transmission information. | |
176 | * | |
69f9032d | 177 | * @param priv A pointer to struct lbs_private structure |
876c9d3a MT |
178 | * @param status A 32 bit value containing transmission status. |
179 | * | |
180 | * @returns void | |
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 | |
c2b310a7 | 186 | if (!priv->monitormode || priv->currenttxskb == NULL) |
876c9d3a MT |
187 | return; |
188 | ||
aa21c004 | 189 | radiotap_hdr = (struct tx_radiotap_hdr *)priv->currenttxskb->data; |
876c9d3a | 190 | |
7919b89c HS |
191 | radiotap_hdr->data_retries = try_count ? |
192 | (1 + priv->txretrycount - try_count) : 0; | |
6f93a8e7 DW |
193 | |
194 | priv->currenttxskb->protocol = eth_type_trans(priv->currenttxskb, | |
195 | priv->rtap_net_dev); | |
196 | netif_rx(priv->currenttxskb); | |
197 | ||
aa21c004 | 198 | priv->currenttxskb = NULL; |
01d77d8d | 199 | |
aa21c004 | 200 | if (priv->connect_status == LBS_CONNECTED) |
634b8f49 | 201 | netif_wake_queue(priv->dev); |
01d77d8d | 202 | |
aa21c004 | 203 | if (priv->mesh_dev && (priv->mesh_connect_status == LBS_CONNECTED)) |
01d77d8d | 204 | netif_wake_queue(priv->mesh_dev); |
876c9d3a | 205 | } |
10078321 | 206 | EXPORT_SYMBOL_GPL(lbs_send_tx_feedback); |