mac80211: move TX info into skb->cb
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>
diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c
index 4b5149c..a61293b 100644
--- a/drivers/net/wireless/iwlwifi/iwl-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-tx.c
@@ -502,7 +502,7 @@
*/
static void iwl_tx_cmd_build_basic(struct iwl_priv *priv,
struct iwl_tx_cmd *tx_cmd,
- struct ieee80211_tx_control *ctrl,
+ struct ieee80211_tx_info *info,
struct ieee80211_hdr *hdr,
int is_unicast, u8 std_id)
{
@@ -510,7 +510,7 @@
__le32 tx_flags = tx_cmd->tx_flags;
tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
- if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
+ if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
tx_flags |= TX_CMD_FLG_ACK_MSK;
if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
@@ -538,10 +538,10 @@
tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
}
- if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
+ if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) {
tx_flags |= TX_CMD_FLG_RTS_MSK;
tx_flags &= ~TX_CMD_FLG_CTS_MSK;
- } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
+ } else if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT) {
tx_flags &= ~TX_CMD_FLG_RTS_MSK;
tx_flags |= TX_CMD_FLG_CTS_MSK;
}
@@ -570,7 +570,7 @@
static void iwl_tx_cmd_build_rate(struct iwl_priv *priv,
struct iwl_tx_cmd *tx_cmd,
- struct ieee80211_tx_control *ctrl,
+ struct ieee80211_tx_info *info,
u16 fc, int sta_id,
int is_hcca)
{
@@ -580,7 +580,7 @@
u16 rate_flags = 0;
int rate_idx;
- rate_idx = min(ieee80211_get_tx_rate(priv->hw, ctrl)->hw_value & 0xffff,
+ rate_idx = min(ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xffff,
IWL_RATE_COUNT - 1);
rate_plcp = iwl_rates[rate_idx].plcp;
@@ -637,18 +637,18 @@
}
static void iwl_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
- struct ieee80211_tx_control *ctl,
+ struct ieee80211_tx_info *info,
struct iwl_tx_cmd *tx_cmd,
struct sk_buff *skb_frag,
int sta_id)
{
- struct ieee80211_key_conf *keyconf = ctl->hw_key;
+ struct ieee80211_key_conf *keyconf = info->control.hw_key;
switch (keyconf->alg) {
case ALG_CCMP:
tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
- if (ctl->flags & IEEE80211_TXCTL_AMPDU)
+ if (info->flags & IEEE80211_TX_CTL_AMPDU)
tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
break;
@@ -690,13 +690,13 @@
/*
* start REPLY_TX command process
*/
-int iwl_tx_skb(struct iwl_priv *priv,
- struct sk_buff *skb, struct ieee80211_tx_control *ctl)
+int iwl_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct iwl_tfd_frame *tfd;
u32 *control_flags;
- int txq_id = ctl->queue;
+ int txq_id = info->queue;
struct iwl_tx_queue *txq = NULL;
struct iwl_queue *q = NULL;
dma_addr_t phys_addr;
@@ -726,7 +726,7 @@
goto drop_unlock;
}
- if ((ieee80211_get_tx_rate(priv->hw, ctl)->hw_value & 0xFF) ==
+ if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) ==
IWL_INVALID_RATE) {
IWL_ERROR("ERROR: No TX rate available.\n");
goto drop_unlock;
@@ -782,7 +782,7 @@
seq_number += 0x10;
#ifdef CONFIG_IWL4965_HT
/* aggregation is on for this <sta,tid> */
- if (ctl->flags & IEEE80211_TXCTL_AMPDU)
+ if (info->flags & IEEE80211_TX_CTL_AMPDU)
txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
priv->stations[sta_id].tid[tid].tfds_in_queue++;
#endif /* CONFIG_IWL4965_HT */
@@ -803,8 +803,6 @@
/* Set up driver data for this TFD */
memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
txq->txb[q->write_ptr].skb[0] = skb;
- memcpy(&(txq->txb[q->write_ptr].status.control),
- ctl, sizeof(struct ieee80211_tx_control));
/* Set up first empty entry in queue's array of Tx/cmd buffers */
out_cmd = &txq->cmd[idx];
@@ -854,8 +852,8 @@
* first entry */
iwl_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
- if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
- iwl_tx_cmd_build_hwcrypto(priv, ctl, tx_cmd, skb, sta_id);
+ if (!(info->flags & IEEE80211_TX_CTL_DO_NOT_ENCRYPT))
+ iwl_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id);
/* Set up TFD's 2nd entry to point directly to remainder of skb,
* if any (802.11 null frames have no payload). */
@@ -874,10 +872,10 @@
len = (u16)skb->len;
tx_cmd->len = cpu_to_le16(len);
/* TODO need this for burst mode later on */
- iwl_tx_cmd_build_basic(priv, tx_cmd, ctl, hdr, unicast, sta_id);
+ iwl_tx_cmd_build_basic(priv, tx_cmd, info, hdr, unicast, sta_id);
/* set is_hcca to 0; it probably will never be implemented */
- iwl_tx_cmd_build_rate(priv, tx_cmd, ctl, fc, sta_id, 0);
+ iwl_tx_cmd_build_rate(priv, tx_cmd, info, fc, sta_id, 0);
iwl_update_tx_stats(priv, fc, len);
@@ -919,7 +917,7 @@
spin_unlock_irqrestore(&priv->lock, flags);
}
- ieee80211_stop_queue(priv->hw, ctl->queue);
+ ieee80211_stop_queue(priv->hw, info->queue);
}
return 0;