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path: root/drivers/net/wireless/libertas/tx.c
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Diffstat (limited to 'drivers/net/wireless/libertas/tx.c')
-rw-r--r--drivers/net/wireless/libertas/tx.c253
1 files changed, 96 insertions, 157 deletions
diff --git a/drivers/net/wireless/libertas/tx.c b/drivers/net/wireless/libertas/tx.c
index fbec06c10dd7..00d95f75bd89 100644
--- a/drivers/net/wireless/libertas/tx.c
+++ b/drivers/net/wireless/libertas/tx.c
@@ -2,6 +2,7 @@
* This file contains the handling of TX in wlan driver.
*/
#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
#include "hostcmd.h"
#include "radiotap.h"
@@ -49,188 +50,122 @@ static u32 convert_radiotap_rate_to_mv(u8 rate)
}
/**
- * @brief This function processes a single packet and sends
- * to IF layer
+ * @brief This function checks the conditions and sends packet to IF
+ * layer if everything is ok.
*
- * @param priv A pointer to wlan_private structure
+ * @param priv A pointer to struct lbs_private structure
* @param skb A pointer to skb which includes TX packet
* @return 0 or -1
*/
-static int SendSinglePacket(wlan_private * priv, struct sk_buff *skb)
+int lbs_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
- int ret = 0;
- struct txpd localtxpd;
- struct txpd *plocaltxpd = &localtxpd;
- u8 *p802x_hdr;
- struct tx_radiotap_hdr *pradiotap_hdr;
- u32 new_rate;
- u8 *ptr = priv->adapter->tmptxbuf;
+ unsigned long flags;
+ struct lbs_private *priv = dev->priv;
+ struct txpd *txpd;
+ char *p802x_hdr;
+ uint16_t pkt_len;
+ int ret;
lbs_deb_enter(LBS_DEB_TX);
- if (priv->adapter->surpriseremoved)
- return -1;
+ ret = NETDEV_TX_OK;
+
+ /* We need to protect against the queues being restarted before
+ we get round to stopping them */
+ spin_lock_irqsave(&priv->driver_lock, flags);
+
+ if (priv->surpriseremoved)
+ goto free;
if (!skb->len || (skb->len > MRVDRV_ETH_TX_PACKET_BUFFER_SIZE)) {
lbs_deb_tx("tx err: skb length %d 0 or > %zd\n",
skb->len, MRVDRV_ETH_TX_PACKET_BUFFER_SIZE);
- ret = -1;
- goto done;
+ /* We'll never manage to send this one; drop it and return 'OK' */
+
+ priv->stats.tx_dropped++;
+ priv->stats.tx_errors++;
+ goto free;
}
- memset(plocaltxpd, 0, sizeof(struct txpd));
- plocaltxpd->tx_packet_length = cpu_to_le16(skb->len);
+ netif_stop_queue(priv->dev);
+ if (priv->mesh_dev)
+ netif_stop_queue(priv->mesh_dev);
- /* offset of actual data */
- plocaltxpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd));
+ if (priv->tx_pending_len) {
+ /* This can happen if packets come in on the mesh and eth
+ device simultaneously -- there's no mutual exclusion on
+ hard_start_xmit() calls between devices. */
+ lbs_deb_tx("Packet on %s while busy\n", dev->name);
+ ret = NETDEV_TX_BUSY;
+ goto unlock;
+ }
+
+ priv->tx_pending_len = -1;
+ spin_unlock_irqrestore(&priv->driver_lock, flags);
+
+ lbs_deb_hex(LBS_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100));
+
+ txpd = (void *)priv->tx_pending_buf;
+ memset(txpd, 0, sizeof(struct txpd));
p802x_hdr = skb->data;
- if (priv->adapter->monitormode != WLAN_MONITOR_OFF) {
+ pkt_len = skb->len;
- /* locate radiotap header */
- pradiotap_hdr = (struct tx_radiotap_hdr *)skb->data;
+ if (dev == priv->rtap_net_dev) {
+ struct tx_radiotap_hdr *rtap_hdr = (void *)skb->data;
/* set txpd fields from the radiotap header */
- new_rate = convert_radiotap_rate_to_mv(pradiotap_hdr->rate);
- if (new_rate != 0) {
- /* use new tx_control[4:0] */
- plocaltxpd->tx_control = cpu_to_le32(new_rate);
- }
+ txpd->tx_control = cpu_to_le32(convert_radiotap_rate_to_mv(rtap_hdr->rate));
/* skip the radiotap header */
- p802x_hdr += sizeof(struct tx_radiotap_hdr);
- plocaltxpd->tx_packet_length =
- cpu_to_le16(le16_to_cpu(plocaltxpd->tx_packet_length)
- - sizeof(struct tx_radiotap_hdr));
+ p802x_hdr += sizeof(*rtap_hdr);
+ pkt_len -= sizeof(*rtap_hdr);
+ /* copy destination address from 802.11 header */
+ memcpy(txpd->tx_dest_addr_high, p802x_hdr + 4, ETH_ALEN);
+ } else {
+ /* copy destination address from 802.3 header */
+ memcpy(txpd->tx_dest_addr_high, p802x_hdr, ETH_ALEN);
}
- /* copy destination address from 802.3 or 802.11 header */
- if (priv->adapter->monitormode != WLAN_MONITOR_OFF)
- memcpy(plocaltxpd->tx_dest_addr_high, p802x_hdr + 4, ETH_ALEN);
- else
- memcpy(plocaltxpd->tx_dest_addr_high, p802x_hdr, ETH_ALEN);
- lbs_deb_hex(LBS_DEB_TX, "txpd", (u8 *) plocaltxpd, sizeof(struct txpd));
+ txpd->tx_packet_length = cpu_to_le16(pkt_len);
+ txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd));
- if (IS_MESH_FRAME(skb)) {
- plocaltxpd->tx_control |= cpu_to_le32(TxPD_MESH_FRAME);
- }
+ if (dev == priv->mesh_dev)
+ txpd->tx_control |= cpu_to_le32(TxPD_MESH_FRAME);
- memcpy(ptr, plocaltxpd, sizeof(struct txpd));
+ lbs_deb_hex(LBS_DEB_TX, "txpd", (u8 *) &txpd, sizeof(struct txpd));
- ptr += sizeof(struct txpd);
+ lbs_deb_hex(LBS_DEB_TX, "Tx Data", (u8 *) p802x_hdr, le16_to_cpu(txpd->tx_packet_length));
- lbs_deb_hex(LBS_DEB_TX, "Tx Data", (u8 *) p802x_hdr, le16_to_cpu(plocaltxpd->tx_packet_length));
- memcpy(ptr, p802x_hdr, le16_to_cpu(plocaltxpd->tx_packet_length));
- ret = priv->hw_host_to_card(priv, MVMS_DAT,
- priv->adapter->tmptxbuf,
- le16_to_cpu(plocaltxpd->tx_packet_length) +
- sizeof(struct txpd));
+ memcpy(&txpd[1], p802x_hdr, le16_to_cpu(txpd->tx_packet_length));
- if (ret) {
- lbs_deb_tx("tx err: hw_host_to_card returned 0x%X\n", ret);
- goto done;
- }
+ spin_lock_irqsave(&priv->driver_lock, flags);
+ priv->tx_pending_len = pkt_len + sizeof(struct txpd);
- lbs_deb_tx("SendSinglePacket succeeds\n");
+ lbs_deb_tx("%s lined up packet\n", __func__);
-done:
- if (!ret) {
- priv->stats.tx_packets++;
- priv->stats.tx_bytes += skb->len;
- } else {
- priv->stats.tx_dropped++;
- priv->stats.tx_errors++;
- }
+ priv->stats.tx_packets++;
+ priv->stats.tx_bytes += skb->len;
- if (!ret && priv->adapter->monitormode != WLAN_MONITOR_OFF) {
+ dev->trans_start = jiffies;
+
+ if (priv->monitormode != LBS_MONITOR_OFF) {
/* Keep the skb to echo it back once Tx feedback is
received from FW */
skb_orphan(skb);
- /* stop processing outgoing pkts */
- netif_stop_queue(priv->dev);
- if (priv->mesh_dev)
- netif_stop_queue(priv->mesh_dev);
- /* freeze any packets already in our queues */
- priv->adapter->TxLockFlag = 1;
- } else {
- dev_kfree_skb_any(skb);
- priv->adapter->currenttxskb = NULL;
- }
- lbs_deb_leave_args(LBS_DEB_TX, "ret %d", ret);
- return ret;
-}
-
-
-void libertas_tx_runqueue(wlan_private *priv)
-{
- wlan_adapter *adapter = priv->adapter;
- int i;
-
- spin_lock(&adapter->txqueue_lock);
- for (i = 0; i < adapter->tx_queue_idx; i++) {
- struct sk_buff *skb = adapter->tx_queue_ps[i];
- spin_unlock(&adapter->txqueue_lock);
- SendSinglePacket(priv, skb);
- spin_lock(&adapter->txqueue_lock);
- }
- adapter->tx_queue_idx = 0;
- spin_unlock(&adapter->txqueue_lock);
-}
-
-static void wlan_tx_queue(wlan_private *priv, struct sk_buff *skb)
-{
- wlan_adapter *adapter = priv->adapter;
-
- spin_lock(&adapter->txqueue_lock);
-
- WARN_ON(priv->adapter->tx_queue_idx >= NR_TX_QUEUE);
- adapter->tx_queue_ps[adapter->tx_queue_idx++] = skb;
- if (adapter->tx_queue_idx == NR_TX_QUEUE) {
- netif_stop_queue(priv->dev);
- if (priv->mesh_dev)
- netif_stop_queue(priv->mesh_dev);
+ /* Keep the skb around for when we get feedback */
+ priv->currenttxskb = skb;
} else {
- netif_start_queue(priv->dev);
- if (priv->mesh_dev)
- netif_start_queue(priv->mesh_dev);
- }
-
- spin_unlock(&adapter->txqueue_lock);
-}
-
-/**
- * @brief This function checks the conditions and sends packet to IF
- * layer if everything is ok.
- *
- * @param priv A pointer to wlan_private structure
- * @return n/a
- */
-int libertas_process_tx(wlan_private * priv, struct sk_buff *skb)
-{
- int ret = -1;
-
- lbs_deb_enter(LBS_DEB_TX);
- lbs_deb_hex(LBS_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100));
-
- if (priv->dnld_sent) {
- lbs_pr_alert( "TX error: dnld_sent = %d, not sending\n",
- priv->dnld_sent);
- goto done;
- }
-
- if ((priv->adapter->psstate == PS_STATE_SLEEP) ||
- (priv->adapter->psstate == PS_STATE_PRE_SLEEP)) {
- wlan_tx_queue(priv, skb);
- return ret;
+ free:
+ dev_kfree_skb_any(skb);
}
+ unlock:
+ spin_unlock_irqrestore(&priv->driver_lock, flags);
+ wake_up(&priv->waitq);
- priv->adapter->currenttxskb = skb;
-
- ret = SendSinglePacket(priv, skb);
-done:
lbs_deb_leave_args(LBS_DEB_TX, "ret %d", ret);
return ret;
}
@@ -239,24 +174,23 @@ done:
* @brief This function sends to the host the last transmitted packet,
* filling the radiotap headers with transmission information.
*
- * @param priv A pointer to wlan_private structure
+ * @param priv A pointer to struct lbs_private structure
* @param status A 32 bit value containing transmission status.
*
* @returns void
*/
-void libertas_send_tx_feedback(wlan_private * priv)
+void lbs_send_tx_feedback(struct lbs_private *priv)
{
- wlan_adapter *adapter = priv->adapter;
struct tx_radiotap_hdr *radiotap_hdr;
- u32 status = adapter->eventcause;
+ u32 status = priv->eventcause;
int txfail;
int try_count;
- if (adapter->monitormode == WLAN_MONITOR_OFF ||
- adapter->currenttxskb == NULL)
+ if (priv->monitormode == LBS_MONITOR_OFF ||
+ priv->currenttxskb == NULL)
return;
- radiotap_hdr = (struct tx_radiotap_hdr *)adapter->currenttxskb->data;
+ radiotap_hdr = (struct tx_radiotap_hdr *)priv->currenttxskb->data;
txfail = (status >> 24);
@@ -269,14 +203,19 @@ void libertas_send_tx_feedback(wlan_private * priv)
#endif
try_count = (status >> 16) & 0xff;
radiotap_hdr->data_retries = (try_count) ?
- (1 + adapter->txretrycount - try_count) : 0;
- libertas_upload_rx_packet(priv, adapter->currenttxskb);
- adapter->currenttxskb = NULL;
- priv->adapter->TxLockFlag = 0;
- if (priv->adapter->connect_status == LIBERTAS_CONNECTED) {
+ (1 + priv->txretrycount - try_count) : 0;
+
+
+ priv->currenttxskb->protocol = eth_type_trans(priv->currenttxskb,
+ priv->rtap_net_dev);
+ netif_rx(priv->currenttxskb);
+
+ priv->currenttxskb = NULL;
+
+ if (priv->connect_status == LBS_CONNECTED)
netif_wake_queue(priv->dev);
- if (priv->mesh_dev)
- netif_wake_queue(priv->mesh_dev);
- }
+
+ if (priv->mesh_dev && (priv->mesh_connect_status == LBS_CONNECTED))
+ netif_wake_queue(priv->mesh_dev);
}
-EXPORT_SYMBOL_GPL(libertas_send_tx_feedback);
+EXPORT_SYMBOL_GPL(lbs_send_tx_feedback);