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authorHolger Schurig <hs4233@mail.mn-solutions.de>2008-04-01 14:50:43 +0200
committerJohn W. Linville <linville@tuxdriver.com>2008-04-16 15:59:56 -0400
commit7919b89c8276d657976d4d4d6b7cb58ea1aa08c3 (patch)
tree31fc24e2f8b7d8eeee67347333e078591796d4b7 /drivers/net/wireless/libertas/tx.c
parent98dd6a575928ed9c42130d208e6bfb0f7a914d5a (diff)
libertas: convert libertas driver to use an event/cmdresp queue
This patch (co-developed by Dan Williams and Holger Schurig) uses a kfifo object for events and a swapping buffer scheme for the command response to preserve the zero-copy semantics of the CF driver and keep memory usage low. The main thread should only ever touch the buffer indexed by priv->resp_idx, while the interface code is free to write to the second buffer, then swap priv->resp_idx under the driver spinlock. The firmware specs only permit one in-flight command, so there will only ever be one command response to process at a time. Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de> Signed-off-by: Dan Williams <dcbw@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/libertas/tx.c')
-rw-r--r--drivers/net/wireless/libertas/tx.c20
1 files changed, 3 insertions, 17 deletions
diff --git a/drivers/net/wireless/libertas/tx.c b/drivers/net/wireless/libertas/tx.c
index 77f1f9525b8..a4972fed294 100644
--- a/drivers/net/wireless/libertas/tx.c
+++ b/drivers/net/wireless/libertas/tx.c
@@ -179,31 +179,17 @@ int lbs_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
*
* @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 || 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;
-
+ radiotap_hdr->data_retries = try_count ?
+ (1 + priv->txretrycount - try_count) : 0;
priv->currenttxskb->protocol = eth_type_trans(priv->currenttxskb,
priv->rtap_net_dev);