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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> | |
5 | ||
6 | #include "hostcmd.h" | |
7 | #include "radiotap.h" | |
876c9d3a MT |
8 | #include "decl.h" |
9 | #include "defs.h" | |
10 | #include "dev.h" | |
11 | #include "wext.h" | |
12 | ||
13 | /** | |
14 | * @brief This function converts Tx/Rx rates from IEEE80211_RADIOTAP_RATE | |
15 | * units (500 Kb/s) into Marvell WLAN format (see Table 8 in Section 3.2.1) | |
16 | * | |
17 | * @param rate Input rate | |
18 | * @return Output Rate (0 if invalid) | |
19 | */ | |
20 | static u32 convert_radiotap_rate_to_mv(u8 rate) | |
21 | { | |
22 | switch (rate) { | |
23 | case 2: /* 1 Mbps */ | |
24 | return 0 | (1 << 4); | |
25 | case 4: /* 2 Mbps */ | |
26 | return 1 | (1 << 4); | |
27 | case 11: /* 5.5 Mbps */ | |
28 | return 2 | (1 << 4); | |
29 | case 22: /* 11 Mbps */ | |
30 | return 3 | (1 << 4); | |
31 | case 12: /* 6 Mbps */ | |
32 | return 4 | (1 << 4); | |
33 | case 18: /* 9 Mbps */ | |
34 | return 5 | (1 << 4); | |
35 | case 24: /* 12 Mbps */ | |
36 | return 6 | (1 << 4); | |
37 | case 36: /* 18 Mbps */ | |
38 | return 7 | (1 << 4); | |
39 | case 48: /* 24 Mbps */ | |
40 | return 8 | (1 << 4); | |
41 | case 72: /* 36 Mbps */ | |
42 | return 9 | (1 << 4); | |
43 | case 96: /* 48 Mbps */ | |
44 | return 10 | (1 << 4); | |
45 | case 108: /* 54 Mbps */ | |
46 | return 11 | (1 << 4); | |
47 | } | |
48 | return 0; | |
49 | } | |
50 | ||
51 | /** | |
6b4a7e0f DW |
52 | * @brief This function checks the conditions and sends packet to IF |
53 | * layer if everything is ok. | |
876c9d3a | 54 | * |
69f9032d | 55 | * @param priv A pointer to struct lbs_private structure |
876c9d3a MT |
56 | * @param skb A pointer to skb which includes TX packet |
57 | * @return 0 or -1 | |
58 | */ | |
8af23b2f | 59 | int lbs_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) |
876c9d3a | 60 | { |
a2b62dc1 | 61 | unsigned long flags; |
8af23b2f | 62 | struct lbs_private *priv = dev->priv; |
a2b62dc1 DW |
63 | struct txpd *txpd; |
64 | char *p802x_hdr; | |
65 | uint16_t pkt_len; | |
66 | int ret; | |
876c9d3a | 67 | |
9012b28a | 68 | lbs_deb_enter(LBS_DEB_TX); |
876c9d3a | 69 | |
a2b62dc1 | 70 | ret = NETDEV_TX_BUSY; |
8af23b2f | 71 | |
6b4a7e0f DW |
72 | if (priv->dnld_sent) { |
73 | lbs_pr_alert( "TX error: dnld_sent = %d, not sending\n", | |
74 | priv->dnld_sent); | |
75 | goto done; | |
76 | } | |
77 | ||
8af23b2f DW |
78 | if (priv->currenttxskb) { |
79 | lbs_pr_err("%s while TX skb pending\n", __func__); | |
80 | goto done; | |
81 | } | |
82 | ||
6b4a7e0f DW |
83 | if ((priv->psstate == PS_STATE_SLEEP) || |
84 | (priv->psstate == PS_STATE_PRE_SLEEP)) { | |
85 | lbs_pr_alert("TX error: packet xmit in %ssleep mode\n", | |
86 | priv->psstate == PS_STATE_SLEEP?"":"pre-"); | |
87 | goto done; | |
88 | } | |
89 | ||
aa21c004 | 90 | if (priv->surpriseremoved) |
a2b62dc1 | 91 | goto drop; |
876c9d3a | 92 | |
876c9d3a | 93 | if (!skb->len || (skb->len > MRVDRV_ETH_TX_PACKET_BUFFER_SIZE)) { |
9012b28a | 94 | lbs_deb_tx("tx err: skb length %d 0 or > %zd\n", |
876c9d3a | 95 | skb->len, MRVDRV_ETH_TX_PACKET_BUFFER_SIZE); |
a2b62dc1 DW |
96 | /* We'll never manage to send this one; drop it and return 'OK' */ |
97 | goto drop; | |
876c9d3a MT |
98 | } |
99 | ||
a2b62dc1 | 100 | lbs_deb_hex(LBS_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100)); |
876c9d3a | 101 | |
a2b62dc1 DW |
102 | txpd = (void *)priv->tmptxbuf; |
103 | memset(txpd, 0, sizeof(struct txpd)); | |
876c9d3a | 104 | |
876c9d3a | 105 | p802x_hdr = skb->data; |
a2b62dc1 | 106 | pkt_len = skb->len; |
876c9d3a | 107 | |
a2b62dc1 DW |
108 | if (priv->monitormode != LBS_MONITOR_OFF) { |
109 | struct tx_radiotap_hdr *rtap_hdr = (void *)skb->data; | |
876c9d3a MT |
110 | |
111 | /* set txpd fields from the radiotap header */ | |
a2b62dc1 | 112 | txpd->tx_control = cpu_to_le32(convert_radiotap_rate_to_mv(rtap_hdr->rate)); |
876c9d3a MT |
113 | |
114 | /* skip the radiotap header */ | |
a2b62dc1 DW |
115 | p802x_hdr += sizeof(*rtap_hdr); |
116 | pkt_len -= sizeof(*rtap_hdr); | |
876c9d3a | 117 | |
a2b62dc1 DW |
118 | /* copy destination address from 802.11 header */ |
119 | memcpy(txpd->tx_dest_addr_high, p802x_hdr + 4, ETH_ALEN); | |
120 | } else { | |
121 | /* copy destination address from 802.3 header */ | |
122 | memcpy(txpd->tx_dest_addr_high, p802x_hdr, ETH_ALEN); | |
876c9d3a | 123 | } |
876c9d3a | 124 | |
a2b62dc1 DW |
125 | txpd->tx_packet_length = cpu_to_le16(pkt_len); |
126 | txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd)); | |
876c9d3a | 127 | |
a2b62dc1 DW |
128 | if (dev == priv->mesh_dev) |
129 | txpd->tx_control |= cpu_to_le32(TxPD_MESH_FRAME); | |
876c9d3a | 130 | |
a2b62dc1 | 131 | lbs_deb_hex(LBS_DEB_TX, "txpd", (u8 *) &txpd, sizeof(struct txpd)); |
876c9d3a | 132 | |
a2b62dc1 | 133 | lbs_deb_hex(LBS_DEB_TX, "Tx Data", (u8 *) p802x_hdr, le16_to_cpu(txpd->tx_packet_length)); |
876c9d3a | 134 | |
a2b62dc1 | 135 | memcpy(&txpd[1], p802x_hdr, le16_to_cpu(txpd->tx_packet_length)); |
876c9d3a | 136 | |
a2b62dc1 DW |
137 | /* We need to protect against the queues being restarted before |
138 | we get round to stopping them */ | |
139 | spin_lock_irqsave(&priv->driver_lock, flags); | |
876c9d3a | 140 | |
a2b62dc1 DW |
141 | ret = priv->hw_host_to_card(priv, MVMS_DAT, priv->tmptxbuf, |
142 | pkt_len + sizeof(struct txpd)); | |
876c9d3a | 143 | |
876c9d3a | 144 | if (!ret) { |
a2b62dc1 DW |
145 | lbs_deb_tx("%s succeeds\n", __func__); |
146 | ||
147 | /* Stop processing outgoing pkts before submitting */ | |
148 | netif_stop_queue(priv->dev); | |
149 | if (priv->mesh_dev) | |
150 | netif_stop_queue(priv->mesh_dev); | |
151 | ||
876c9d3a MT |
152 | priv->stats.tx_packets++; |
153 | priv->stats.tx_bytes += skb->len; | |
8af23b2f | 154 | |
a2b62dc1 DW |
155 | dev->trans_start = jiffies; |
156 | ||
157 | if (priv->monitormode != LBS_MONITOR_OFF) { | |
158 | /* Keep the skb to echo it back once Tx feedback is | |
159 | received from FW */ | |
160 | skb_orphan(skb); | |
161 | ||
162 | /* Keep the skb around for when we get feedback */ | |
163 | priv->currenttxskb = skb; | |
164 | } | |
876c9d3a | 165 | } |
a2b62dc1 DW |
166 | |
167 | spin_unlock_irqrestore(&priv->driver_lock, flags); | |
876c9d3a | 168 | |
a2b62dc1 DW |
169 | if (ret) { |
170 | lbs_deb_tx("tx err: hw_host_to_card returned 0x%X\n", ret); | |
171 | drop: | |
172 | priv->stats.tx_dropped++; | |
173 | priv->stats.tx_errors++; | |
f86a93e1 | 174 | |
876c9d3a | 175 | dev_kfree_skb_any(skb); |
876c9d3a MT |
176 | } |
177 | ||
a2b62dc1 DW |
178 | /* Even if we dropped the packet, return OK. Otherwise the |
179 | packet gets requeued. */ | |
180 | ret = NETDEV_TX_OK; | |
181 | ||
876c9d3a | 182 | done: |
9012b28a | 183 | lbs_deb_leave_args(LBS_DEB_TX, "ret %d", ret); |
876c9d3a MT |
184 | return ret; |
185 | } | |
186 | ||
187 | /** | |
188 | * @brief This function sends to the host the last transmitted packet, | |
189 | * filling the radiotap headers with transmission information. | |
190 | * | |
69f9032d | 191 | * @param priv A pointer to struct lbs_private structure |
876c9d3a MT |
192 | * @param status A 32 bit value containing transmission status. |
193 | * | |
194 | * @returns void | |
195 | */ | |
69f9032d | 196 | void lbs_send_tx_feedback(struct lbs_private *priv) |
876c9d3a | 197 | { |
876c9d3a | 198 | struct tx_radiotap_hdr *radiotap_hdr; |
aa21c004 | 199 | u32 status = priv->eventcause; |
876c9d3a MT |
200 | int txfail; |
201 | int try_count; | |
202 | ||
aa21c004 DW |
203 | if (priv->monitormode == LBS_MONITOR_OFF || |
204 | priv->currenttxskb == NULL) | |
876c9d3a MT |
205 | return; |
206 | ||
aa21c004 | 207 | radiotap_hdr = (struct tx_radiotap_hdr *)priv->currenttxskb->data; |
876c9d3a | 208 | |
876c9d3a MT |
209 | txfail = (status >> 24); |
210 | ||
211 | #if 0 | |
212 | /* The version of roofnet that we've tested does not use this yet | |
213 | * But it may be used in the future. | |
214 | */ | |
215 | if (txfail) | |
216 | radiotap_hdr->flags &= IEEE80211_RADIOTAP_F_TX_FAIL; | |
217 | #endif | |
218 | try_count = (status >> 16) & 0xff; | |
219 | radiotap_hdr->data_retries = (try_count) ? | |
aa21c004 DW |
220 | (1 + priv->txretrycount - try_count) : 0; |
221 | lbs_upload_rx_packet(priv, priv->currenttxskb); | |
222 | priv->currenttxskb = NULL; | |
01d77d8d | 223 | |
aa21c004 | 224 | if (priv->connect_status == LBS_CONNECTED) |
634b8f49 | 225 | netif_wake_queue(priv->dev); |
01d77d8d | 226 | |
aa21c004 | 227 | if (priv->mesh_dev && (priv->mesh_connect_status == LBS_CONNECTED)) |
01d77d8d | 228 | netif_wake_queue(priv->mesh_dev); |
876c9d3a | 229 | } |
10078321 | 230 | EXPORT_SYMBOL_GPL(lbs_send_tx_feedback); |