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mac80211: move TX info into skb->cb

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This patch converts mac80211 and all drivers to have transmit
information and status in skb->cb rather than allocating extra
memory for it and copying all the data around. To make it fit,
a union is used where only data that is necessary for all steps
is kept outside of the union.

A number of fixes were done by Ivo, as well as the rt2x00 part
of this patch.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
2008-05-15 12:55:29 +02:00
committed by John W. Linville
parent e24549485f
commit e039fa4a41
67 changed files with 976 additions and 1270 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
drivers/net/wireless/rtl8187_dev.c
View File

@@ -145,27 +145,22 @@ void rtl8187_write_phy(struct ieee80211_hw *dev, u8 addr, u32 data)
static void rtl8187_tx_cb(struct urb *urb)
{
struct ieee80211_tx_status status;
struct sk_buff *skb = (struct sk_buff *)urb->context;
struct rtl8187_tx_info *info = (struct rtl8187_tx_info *)skb->cb;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_hw *hw = info->driver_data[0];
memset(&status, 0, sizeof(status));
usb_free_urb(info->urb);
if (info->control)
memcpy(&status.control, info->control, sizeof(status.control));
kfree(info->control);
usb_free_urb(info->driver_data[1]);
skb_pull(skb, sizeof(struct rtl8187_tx_hdr));
status.flags |= IEEE80211_TX_STATUS_ACK;
ieee80211_tx_status_irqsafe(info->dev, skb, &status);
memset(&info->status, 0, sizeof(info->status));
info->flags |= IEEE80211_TX_STAT_ACK;
ieee80211_tx_status_irqsafe(hw, skb);
}
static int rtl8187_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
struct ieee80211_tx_control *control)
static int rtl8187_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
{
struct rtl8187_priv *priv = dev->priv;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct rtl8187_tx_hdr *hdr;
struct rtl8187_tx_info *info;
struct urb *urb;
__le16 rts_dur = 0;
u32 flags;
@@ -179,29 +174,27 @@ static int rtl8187_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
flags = skb->len;
flags |= RTL8187_TX_FLAG_NO_ENCRYPT;
flags |= ieee80211_get_tx_rate(dev, control)->hw_value << 24;
flags |= ieee80211_get_tx_rate(dev, info)->hw_value << 24;
if (ieee80211_get_morefrag((struct ieee80211_hdr *)skb->data))
flags |= RTL8187_TX_FLAG_MORE_FRAG;
if (control->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) {
flags |= RTL8187_TX_FLAG_RTS;
flags |= ieee80211_get_rts_cts_rate(dev, control)->hw_value << 19;
flags |= ieee80211_get_rts_cts_rate(dev, info)->hw_value << 19;
rts_dur = ieee80211_rts_duration(dev, priv->vif,
skb->len, control);
} else if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
skb->len, info);
} else if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT) {
flags |= RTL8187_TX_FLAG_CTS;
flags |= ieee80211_get_rts_cts_rate(dev, control)->hw_value << 19;
flags |= ieee80211_get_rts_cts_rate(dev, info)->hw_value << 19;
}
hdr = (struct rtl8187_tx_hdr *)skb_push(skb, sizeof(*hdr));
hdr->flags = cpu_to_le32(flags);
hdr->len = 0;
hdr->rts_duration = rts_dur;
hdr->retry = cpu_to_le32(control->retry_limit << 8);
hdr->retry = cpu_to_le32(info->control.retry_limit << 8);
info = (struct rtl8187_tx_info *)skb->cb;
info->control = kmemdup(control, sizeof(*control), GFP_ATOMIC);
info->urb = urb;
info->dev = dev;
info->driver_data[0] = dev;
info->driver_data[1] = urb;
usb_fill_bulk_urb(urb, priv->udev, usb_sndbulkpipe(priv->udev, 2),
hdr, skb->len, rtl8187_tx_cb, skb);
usb_submit_urb(urb, GFP_ATOMIC);