* This file contains the handling of TX in wlan driver.
*/
#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/sched.h>
-#include "hostcmd.h"
+#include "host.h"
#include "radiotap.h"
#include "decl.h"
#include "defs.h"
* @param skb A pointer to skb which includes TX packet
* @return 0 or -1
*/
-static int lbs_process_tx(struct lbs_private *priv, struct sk_buff *skb)
+netdev_tx_t lbs_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
- int ret = -1;
- struct txpd localtxpd;
- struct txpd *plocaltxpd = &localtxpd;
- u8 *p802x_hdr;
- struct tx_radiotap_hdr *pradiotap_hdr;
- u32 new_rate;
- u8 *ptr = priv->tmptxbuf;
+ unsigned long flags;
+ struct lbs_private *priv = dev->ml_priv;
+ struct txpd *txpd;
+ char *p802x_hdr;
+ uint16_t pkt_len;
+ netdev_tx_t ret = NETDEV_TX_OK;
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->psstate == PS_STATE_SLEEP) ||
- (priv->psstate == PS_STATE_PRE_SLEEP)) {
- lbs_pr_alert("TX error: packet xmit in %ssleep mode\n",
- priv->psstate == PS_STATE_SLEEP?"":"pre-");
- goto done;
- }
+ /* 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)
- return -1;
+ 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);
- goto done_tx;
+ /* We'll never manage to send this one; drop it and return 'OK' */
+
+ dev->stats.tx_dropped++;
+ dev->stats.tx_errors++;
+ goto free;
}
- ret = 0;
- 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->monitormode != LBS_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->monitormode != LBS_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);
- }
+ lbs_mesh_set_txpd(priv, dev, txpd);
- 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->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_tx;
- }
+ spin_lock_irqsave(&priv->driver_lock, flags);
+ priv->tx_pending_len = pkt_len + sizeof(struct txpd);
- lbs_deb_tx("%s succeeds\n", __func__);
+ lbs_deb_tx("%s lined up packet\n", __func__);
-done_tx:
- if (!ret) {
- priv->stats.tx_packets++;
- priv->stats.tx_bytes += skb->len;
- } else {
- priv->stats.tx_dropped++;
- priv->stats.tx_errors++;
- }
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
- if (!ret && priv->monitormode != LBS_MONITOR_OFF) {
+ dev->trans_start = jiffies;
+
+ if (priv->monitormode) {
/* 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);
/* Keep the skb around for when we get feedback */
priv->currenttxskb = skb;
} else {
+ free:
dev_kfree_skb_any(skb);
}
+ unlock:
+ spin_unlock_irqrestore(&priv->driver_lock, flags);
+ wake_up(&priv->waitq);
-done:
- lbs_deb_leave_args(LBS_DEB_TX, "ret %d", ret);
- return ret;
-}
-
-int lbs_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- int ret = 0;
- struct lbs_private *priv = dev->priv;
-
- lbs_deb_enter(LBS_DEB_TX);
-
- /* We could return NETDEV_TX_BUSY here, but I'd actually
- like to get the point where we can BUG() */
- if (priv->dnld_sent) {
- lbs_pr_err("%s while dnld_sent\n", __func__);
- priv->stats.tx_dropped++;
- goto done;
- }
- if (priv->currenttxskb) {
- lbs_pr_err("%s while TX skb pending\n", __func__);
- priv->stats.tx_dropped++;
- goto done;
- }
-
- netif_stop_queue(priv->dev);
- if (priv->mesh_dev)
- netif_stop_queue(priv->mesh_dev);
-
- if (lbs_process_tx(priv, skb) == 0)
- dev->trans_start = jiffies;
-done:
lbs_deb_leave_args(LBS_DEB_TX, "ret %d", ret);
return ret;
}
*
* @returns void
*/
-void lbs_send_tx_feedback(struct lbs_private *priv)
+void lbs_send_tx_feedback(struct lbs_private *priv, u32 try_count)
{
struct tx_radiotap_hdr *radiotap_hdr;
- u32 status = priv->eventcause;
- int txfail;
- int try_count;
- if (priv->monitormode == LBS_MONITOR_OFF ||
- priv->currenttxskb == NULL)
+ if (!priv->monitormode || priv->currenttxskb == NULL)
return;
radiotap_hdr = (struct tx_radiotap_hdr *)priv->currenttxskb->data;
- txfail = (status >> 24);
-
-#if 0
- /* The version of roofnet that we've tested does not use this yet
- * But it may be used in the future.
- */
- if (txfail)
- radiotap_hdr->flags &= IEEE80211_RADIOTAP_F_TX_FAIL;
-#endif
- try_count = (status >> 16) & 0xff;
- radiotap_hdr->data_retries = (try_count) ?
- (1 + priv->txretrycount - try_count) : 0;
- lbs_upload_rx_packet(priv, priv->currenttxskb);
+ radiotap_hdr->data_retries = try_count ?
+ (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 && (priv->mesh_connect_status == LBS_CONNECTED))
+ if (priv->mesh_dev && lbs_mesh_connected(priv))
netif_wake_queue(priv->mesh_dev);
}
EXPORT_SYMBOL_GPL(lbs_send_tx_feedback);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff