+++ /dev/null
-/*
- * This file contains the handling of TX in wlan driver.
- */
-#include <linux/hardirq.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/sched.h>
-#include <linux/export.h>
-#include <net/cfg80211.h>
-
-#include "host.h"
-#include "radiotap.h"
-#include "decl.h"
-#include "defs.h"
-#include "dev.h"
-#include "mesh.h"
-
-/**
- * convert_radiotap_rate_to_mv - converts Tx/Rx rates from IEEE80211_RADIOTAP_RATE
- * units (500 Kb/s) into Marvell WLAN format (see Table 8 in Section 3.2.1)
- *
- * @rate: Input rate
- * returns: Output Rate (0 if invalid)
- */
-static u32 convert_radiotap_rate_to_mv(u8 rate)
-{
- switch (rate) {
- case 2: /* 1 Mbps */
- return 0 | (1 << 4);
- case 4: /* 2 Mbps */
- return 1 | (1 << 4);
- case 11: /* 5.5 Mbps */
- return 2 | (1 << 4);
- case 22: /* 11 Mbps */
- return 3 | (1 << 4);
- case 12: /* 6 Mbps */
- return 4 | (1 << 4);
- case 18: /* 9 Mbps */
- return 5 | (1 << 4);
- case 24: /* 12 Mbps */
- return 6 | (1 << 4);
- case 36: /* 18 Mbps */
- return 7 | (1 << 4);
- case 48: /* 24 Mbps */
- return 8 | (1 << 4);
- case 72: /* 36 Mbps */
- return 9 | (1 << 4);
- case 96: /* 48 Mbps */
- return 10 | (1 << 4);
- case 108: /* 54 Mbps */
- return 11 | (1 << 4);
- }
- return 0;
-}
-
-/**
- * lbs_hard_start_xmit - checks the conditions and sends packet to IF
- * layer if everything is ok
- *
- * @skb: A pointer to skb which includes TX packet
- * @dev: A pointer to the &struct net_device
- * returns: 0 or -1
- */
-netdev_tx_t lbs_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- 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);
-
- /* 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);
- /* We'll never manage to send this one; drop it and return 'OK' */
-
- dev->stats.tx_dropped++;
- dev->stats.tx_errors++;
- goto free;
- }
-
-
- netif_stop_queue(priv->dev);
- if (priv->mesh_dev)
- netif_stop_queue(priv->mesh_dev);
-
- 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;
- pkt_len = skb->len;
-
- if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) {
- struct tx_radiotap_hdr *rtap_hdr = (void *)skb->data;
-
- /* set txpd fields from the radiotap header */
- txpd->tx_control = cpu_to_le32(convert_radiotap_rate_to_mv(rtap_hdr->rate));
-
- /* skip the radiotap header */
- 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);
- }
-
- txpd->tx_packet_length = cpu_to_le16(pkt_len);
- txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd));
-
- lbs_mesh_set_txpd(priv, dev, txpd);
-
- lbs_deb_hex(LBS_DEB_TX, "txpd", (u8 *) &txpd, sizeof(struct txpd));
-
- lbs_deb_hex(LBS_DEB_TX, "Tx Data", (u8 *) p802x_hdr, le16_to_cpu(txpd->tx_packet_length));
-
- memcpy(&txpd[1], p802x_hdr, le16_to_cpu(txpd->tx_packet_length));
-
- spin_lock_irqsave(&priv->driver_lock, flags);
- priv->tx_pending_len = pkt_len + sizeof(struct txpd);
-
- lbs_deb_tx("%s lined up packet\n", __func__);
-
- dev->stats.tx_packets++;
- dev->stats.tx_bytes += skb->len;
-
- if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) {
- /* Keep the skb to echo it back once Tx feedback is
- received from FW */
- skb_orphan(skb);
-
- /* 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);
-
- lbs_deb_leave_args(LBS_DEB_TX, "ret %d", ret);
- return ret;
-}
-
-/**
- * lbs_send_tx_feedback - sends to the host the last transmitted packet,
- * filling the radiotap headers with transmission information.
- *
- * @priv: A pointer to &struct lbs_private structure
- * @try_count: A 32-bit value containing transmission retry status.
- *
- * returns: void
- */
-void lbs_send_tx_feedback(struct lbs_private *priv, u32 try_count)
-{
- struct tx_radiotap_hdr *radiotap_hdr;
-
- if (priv->wdev->iftype != NL80211_IFTYPE_MONITOR ||
- priv->currenttxskb == NULL)
- return;
-
- radiotap_hdr = (struct tx_radiotap_hdr *)priv->currenttxskb->data;
-
- radiotap_hdr->data_retries = try_count ?
- (1 + priv->txretrycount - try_count) : 0;
-
- priv->currenttxskb->protocol = eth_type_trans(priv->currenttxskb,
- priv->dev);
- netif_rx(priv->currenttxskb);
-
- priv->currenttxskb = NULL;
-
- if (priv->connect_status == LBS_CONNECTED)
- netif_wake_queue(priv->dev);
-
- if (priv->mesh_dev && netif_running(priv->mesh_dev))
- netif_wake_queue(priv->mesh_dev);
-}
-EXPORT_SYMBOL_GPL(lbs_send_tx_feedback);
projects / cascardo / linux.git / blobdiff