2 * This file contains the handling of TX in wlan driver.
4 #include <linux/netdevice.h>
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)
17 * @param rate Input rate
18 * @return Output Rate (0 if invalid)
20 static u32 convert_radiotap_rate_to_mv(u8 rate)
27 case 11: /* 5.5 Mbps */
29 case 22: /* 11 Mbps */
35 case 24: /* 12 Mbps */
37 case 36: /* 18 Mbps */
39 case 48: /* 24 Mbps */
41 case 72: /* 36 Mbps */
43 case 96: /* 48 Mbps */
45 case 108: /* 54 Mbps */
52 * @brief This function processes a single packet and sends
55 * @param priv A pointer to wlan_private structure
56 * @param skb A pointer to skb which includes TX packet
59 static int SendSinglePacket(wlan_private * priv, struct sk_buff *skb)
62 struct txpd localtxpd;
63 struct txpd *plocaltxpd = &localtxpd;
65 struct tx_radiotap_hdr *pradiotap_hdr;
67 u8 *ptr = priv->adapter->tmptxbuf;
69 lbs_deb_enter(LBS_DEB_TX);
71 if (priv->adapter->surpriseremoved)
74 if (!skb->len || (skb->len > MRVDRV_ETH_TX_PACKET_BUFFER_SIZE)) {
75 lbs_deb_tx("tx err: skb length %d 0 or > %zd\n",
76 skb->len, MRVDRV_ETH_TX_PACKET_BUFFER_SIZE);
81 memset(plocaltxpd, 0, sizeof(struct txpd));
83 plocaltxpd->tx_packet_length = cpu_to_le16(skb->len);
85 /* offset of actual data */
86 plocaltxpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd));
88 p802x_hdr = skb->data;
89 if (priv->adapter->monitormode != WLAN_MONITOR_OFF) {
91 /* locate radiotap header */
92 pradiotap_hdr = (struct tx_radiotap_hdr *)skb->data;
94 /* set txpd fields from the radiotap header */
95 new_rate = convert_radiotap_rate_to_mv(pradiotap_hdr->rate);
97 /* use new tx_control[4:0] */
98 plocaltxpd->tx_control = cpu_to_le32(new_rate);
101 /* skip the radiotap header */
102 p802x_hdr += sizeof(struct tx_radiotap_hdr);
103 plocaltxpd->tx_packet_length =
104 cpu_to_le16(le16_to_cpu(plocaltxpd->tx_packet_length)
105 - sizeof(struct tx_radiotap_hdr));
108 /* copy destination address from 802.3 or 802.11 header */
109 if (priv->adapter->monitormode != WLAN_MONITOR_OFF)
110 memcpy(plocaltxpd->tx_dest_addr_high, p802x_hdr + 4, ETH_ALEN);
112 memcpy(plocaltxpd->tx_dest_addr_high, p802x_hdr, ETH_ALEN);
114 lbs_deb_hex(LBS_DEB_TX, "txpd", (u8 *) plocaltxpd, sizeof(struct txpd));
116 if (IS_MESH_FRAME(skb)) {
117 plocaltxpd->tx_control |= cpu_to_le32(TxPD_MESH_FRAME);
120 memcpy(ptr, plocaltxpd, sizeof(struct txpd));
122 ptr += sizeof(struct txpd);
124 lbs_deb_hex(LBS_DEB_TX, "Tx Data", (u8 *) p802x_hdr, le16_to_cpu(plocaltxpd->tx_packet_length));
125 memcpy(ptr, p802x_hdr, le16_to_cpu(plocaltxpd->tx_packet_length));
126 ret = priv->hw_host_to_card(priv, MVMS_DAT,
127 priv->adapter->tmptxbuf,
128 le16_to_cpu(plocaltxpd->tx_packet_length) +
129 sizeof(struct txpd));
132 lbs_deb_tx("tx err: hw_host_to_card returned 0x%X\n", ret);
136 lbs_deb_tx("SendSinglePacket succeeds\n");
140 priv->stats.tx_packets++;
141 priv->stats.tx_bytes += skb->len;
143 priv->stats.tx_dropped++;
144 priv->stats.tx_errors++;
147 if (!ret && priv->adapter->monitormode != WLAN_MONITOR_OFF) {
148 /* Keep the skb to echo it back once Tx feedback is
151 /* stop processing outgoing pkts */
152 netif_stop_queue(priv->dev);
154 netif_stop_queue(priv->mesh_dev);
155 /* freeze any packets already in our queues */
156 priv->adapter->TxLockFlag = 1;
158 dev_kfree_skb_any(skb);
159 priv->adapter->currenttxskb = NULL;
162 lbs_deb_leave_args(LBS_DEB_TX, "ret %d", ret);
167 void libertas_tx_runqueue(wlan_private *priv)
169 wlan_adapter *adapter = priv->adapter;
172 spin_lock(&adapter->txqueue_lock);
173 for (i = 0; i < adapter->tx_queue_idx; i++) {
174 struct sk_buff *skb = adapter->tx_queue_ps[i];
175 spin_unlock(&adapter->txqueue_lock);
176 SendSinglePacket(priv, skb);
177 spin_lock(&adapter->txqueue_lock);
179 adapter->tx_queue_idx = 0;
180 spin_unlock(&adapter->txqueue_lock);
183 static void wlan_tx_queue(wlan_private *priv, struct sk_buff *skb)
185 wlan_adapter *adapter = priv->adapter;
187 spin_lock(&adapter->txqueue_lock);
189 WARN_ON(priv->adapter->tx_queue_idx >= NR_TX_QUEUE);
190 adapter->tx_queue_ps[adapter->tx_queue_idx++] = skb;
191 if (adapter->tx_queue_idx == NR_TX_QUEUE) {
192 netif_stop_queue(priv->dev);
194 netif_stop_queue(priv->mesh_dev);
196 netif_start_queue(priv->dev);
198 netif_start_queue(priv->mesh_dev);
201 spin_unlock(&adapter->txqueue_lock);
205 * @brief This function checks the conditions and sends packet to IF
206 * layer if everything is ok.
208 * @param priv A pointer to wlan_private structure
211 int libertas_process_tx(wlan_private * priv, struct sk_buff *skb)
215 lbs_deb_enter(LBS_DEB_TX);
216 lbs_deb_hex(LBS_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100));
218 if (priv->dnld_sent) {
219 lbs_pr_alert( "TX error: dnld_sent = %d, not sending\n",
224 if ((priv->adapter->psstate == PS_STATE_SLEEP) ||
225 (priv->adapter->psstate == PS_STATE_PRE_SLEEP)) {
226 wlan_tx_queue(priv, skb);
230 priv->adapter->currenttxskb = skb;
232 ret = SendSinglePacket(priv, skb);
234 lbs_deb_leave_args(LBS_DEB_TX, "ret %d", ret);
239 * @brief This function sends to the host the last transmitted packet,
240 * filling the radiotap headers with transmission information.
242 * @param priv A pointer to wlan_private structure
243 * @param status A 32 bit value containing transmission status.
247 void libertas_send_tx_feedback(wlan_private * priv)
249 wlan_adapter *adapter = priv->adapter;
250 struct tx_radiotap_hdr *radiotap_hdr;
251 u32 status = adapter->eventcause;
255 if (adapter->monitormode == WLAN_MONITOR_OFF ||
256 adapter->currenttxskb == NULL)
259 radiotap_hdr = (struct tx_radiotap_hdr *)adapter->currenttxskb->data;
261 txfail = (status >> 24);
264 /* The version of roofnet that we've tested does not use this yet
265 * But it may be used in the future.
268 radiotap_hdr->flags &= IEEE80211_RADIOTAP_F_TX_FAIL;
270 try_count = (status >> 16) & 0xff;
271 radiotap_hdr->data_retries = (try_count) ?
272 (1 + adapter->txretrycount - try_count) : 0;
273 libertas_upload_rx_packet(priv, adapter->currenttxskb);
274 adapter->currenttxskb = NULL;
275 priv->adapter->TxLockFlag = 0;
276 if (priv->adapter->connect_status == LIBERTAS_CONNECTED) {
277 netif_wake_queue(priv->dev);
279 netif_wake_queue(priv->mesh_dev);
282 EXPORT_SYMBOL_GPL(libertas_send_tx_feedback);