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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

36
drivers/net/wireless/b43/pio.c
View File

@@ -446,29 +446,27 @@ static void pio_tx_frame_4byte_queue(struct b43_pio_txpacket *pack,
}
static int pio_tx_frame(struct b43_pio_txqueue *q,
struct sk_buff *skb,
struct ieee80211_tx_control *ctl)
struct sk_buff *skb)
{
struct b43_pio_txpacket *pack;
struct b43_txhdr txhdr;
u16 cookie;
int err;
unsigned int hdrlen;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
B43_WARN_ON(list_empty(&q->packets_list));
pack = list_entry(q->packets_list.next,
struct b43_pio_txpacket, list);
memset(&pack->txstat, 0, sizeof(pack->txstat));
memcpy(&pack->txstat.control, ctl, sizeof(*ctl));
cookie = generate_cookie(q, pack);
hdrlen = b43_txhdr_size(q->dev);
err = b43_generate_txhdr(q->dev, (u8 *)&txhdr, skb->data,
skb->len, ctl, cookie);
skb->len, info, cookie);
if (err)
return err;
if (ctl->flags & IEEE80211_TXCTL_SEND_AFTER_DTIM) {
if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
/* Tell the firmware about the cookie of the last
* mcast frame, so it can clear the more-data bit in it. */
b43_shm_write16(q->dev, B43_SHM_SHARED,
@@ -492,17 +490,18 @@ static int pio_tx_frame(struct b43_pio_txqueue *q,
return 0;
}
int b43_pio_tx(struct b43_wldev *dev,
struct sk_buff *skb, struct ieee80211_tx_control *ctl)
int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb)
{
struct b43_pio_txqueue *q;
struct ieee80211_hdr *hdr;
unsigned long flags;
unsigned int hdrlen, total_len;
int err = 0;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
hdr = (struct ieee80211_hdr *)skb->data;
if (ctl->flags & IEEE80211_TXCTL_SEND_AFTER_DTIM) {
if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
/* The multicast queue will be sent after the DTIM. */
q = dev->pio.tx_queue_mcast;
/* Set the frame More-Data bit. Ucode will clear it
@@ -510,7 +509,7 @@ int b43_pio_tx(struct b43_wldev *dev,
hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA);
} else {
/* Decide by priority where to put this frame. */
q = select_queue_by_priority(dev, ctl->queue);
q = select_queue_by_priority(dev, info->queue);
}
spin_lock_irqsave(&q->lock, flags);
@@ -533,7 +532,7 @@ int b43_pio_tx(struct b43_wldev *dev,
if (total_len > (q->buffer_size - q->buffer_used)) {
/* Not enough memory on the queue. */
err = -EBUSY;
ieee80211_stop_queue(dev->wl->hw, ctl->queue);
ieee80211_stop_queue(dev->wl->hw, info->queue);
q->stopped = 1;
goto out_unlock;
}
@@ -541,9 +540,9 @@ int b43_pio_tx(struct b43_wldev *dev,
/* Assign the queue number to the ring (if not already done before)
* so TX status handling can use it. The mac80211-queue to b43-queue
* mapping is static, so we don't need to store it per frame. */
q->queue_prio = ctl->queue;
q->queue_prio = info->queue;
err = pio_tx_frame(q, skb, ctl);
err = pio_tx_frame(q, skb);
if (unlikely(err == -ENOKEY)) {
/* Drop this packet, as we don't have the encryption key
* anymore and must not transmit it unencrypted. */
@@ -561,7 +560,7 @@ int b43_pio_tx(struct b43_wldev *dev,
if (((q->buffer_size - q->buffer_used) < roundup(2 + 2 + 6, 4)) ||
(q->free_packet_slots == 0)) {
/* The queue is full. */
ieee80211_stop_queue(dev->wl->hw, ctl->queue);
ieee80211_stop_queue(dev->wl->hw, info->queue);
q->stopped = 1;
}
@@ -578,6 +577,7 @@ void b43_pio_handle_txstatus(struct b43_wldev *dev,
struct b43_pio_txqueue *q;
struct b43_pio_txpacket *pack = NULL;
unsigned int total_len;
struct ieee80211_tx_info *info;
q = parse_cookie(dev, status->cookie, &pack);
if (unlikely(!q))
@@ -586,15 +586,17 @@ void b43_pio_handle_txstatus(struct b43_wldev *dev,
spin_lock(&q->lock); /* IRQs are already disabled. */
b43_fill_txstatus_report(&(pack->txstat), status);
info = (void *)pack->skb;
memset(&info->status, 0, sizeof(info->status));
b43_fill_txstatus_report(info, status);
total_len = pack->skb->len + b43_txhdr_size(dev);
total_len = roundup(total_len, 4);
q->buffer_used -= total_len;
q->free_packet_slots += 1;
ieee80211_tx_status_irqsafe(dev->wl->hw, pack->skb,
&(pack->txstat));
ieee80211_tx_status_irqsafe(dev->wl->hw, pack->skb);
pack->skb = NULL;
list_add(&pack->list, &q->packets_list);