mac80211: clean up rate selection
Move some code out of rc80211_simple since it's probably needed for all rate
selection algorithms, and fix iwlwifi accordingly. While at it, clean up the
rate_control_get_rate() interface.
Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945-rs.c b/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
index c48b1b5..ea7f459 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
@@ -562,22 +562,6 @@
return;
}
-static struct ieee80211_rate *iwl_get_lowest_rate(struct ieee80211_local
- *local)
-{
- struct ieee80211_hw_mode *mode = local->oper_hw_mode;
- int i;
-
- for (i = 0; i < mode->num_rates; i++) {
- struct ieee80211_rate *rate = &mode->rates[i];
-
- if (rate->flags & IEEE80211_RATE_SUPPORTED)
- return rate;
- }
-
- return &mode->rates[0];
-}
-
static u16 iwl_get_adjacent_rate(struct iwl_rate_scale_priv *rs_priv,
u8 index, u16 rate_mask, int phymode)
{
@@ -656,10 +640,9 @@
* rate table and must reference the driver allocated rate table
*
*/
-static struct ieee80211_rate *rs_get_rate(void *priv_rate,
- struct net_device *dev,
- struct sk_buff *skb,
- struct rate_control_extra *extra)
+static void rs_get_rate(void *priv_rate, struct net_device *dev,
+ struct ieee80211_hw_mode *mode, struct sk_buff *skb,
+ struct rate_selection *sel)
{
u8 low = IWL_RATE_INVALID;
u8 high = IWL_RATE_INVALID;
@@ -676,32 +659,19 @@
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct sta_info *sta;
- u16 fc, rate_mask;
+ u16 rate_mask;
struct iwl_priv *priv = (struct iwl_priv *)priv_rate;
DECLARE_MAC_BUF(mac);
IWL_DEBUG_RATE("enter\n");
- memset(extra, 0, sizeof(*extra));
-
- fc = le16_to_cpu(hdr->frame_control);
- if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
- (is_multicast_ether_addr(hdr->addr1))) {
- /* Send management frames and broadcast/multicast data using
- * lowest rate. */
- /* TODO: this could probably be improved.. */
- IWL_DEBUG_RATE("leave: lowest rate (not data or is "
- "multicast)\n");
-
- return iwl_get_lowest_rate(local);
- }
-
sta = sta_info_get(local, hdr->addr1);
if (!sta || !sta->rate_ctrl_priv) {
IWL_DEBUG_RATE("leave: No STA priv data to update!\n");
+ sel->rate = rate_lowest(local, local->oper_hw_mode, sta);
if (sta)
sta_info_put(sta);
- return NULL;
+ return;
}
rate_mask = sta->supp_rates;
@@ -846,7 +816,7 @@
IWL_DEBUG_RATE("leave: %d\n", index);
- return &priv->ieee_rates[index];
+ sel->rate = &priv->ieee_rates[index];
}
static struct rate_control_ops rs_ops = {
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965-rs.c b/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
index 8dc78c0..62a3b52 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
@@ -1693,55 +1693,27 @@
return;
}
-static struct ieee80211_rate *rs_get_lowest_rate(struct ieee80211_local
- *local)
-{
- struct ieee80211_hw_mode *mode = local->oper_hw_mode;
- int i;
-
- for (i = 0; i < mode->num_rates; i++) {
- struct ieee80211_rate *rate = &mode->rates[i];
-
- if (rate->flags & IEEE80211_RATE_SUPPORTED)
- return rate;
- }
-
- return &mode->rates[0];
-}
-
-static struct ieee80211_rate *rs_get_rate(void *priv_rate,
- struct net_device *dev,
- struct sk_buff *skb,
- struct rate_control_extra
- *extra)
+static void rs_get_rate(void *priv_rate, struct net_device *dev,
+ struct ieee80211_hw_mode *mode, struct sk_buff *skb,
+ struct rate_selection *sel)
{
int i;
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct sta_info *sta;
- u16 fc;
struct iwl_priv *priv = (struct iwl_priv *)priv_rate;
struct iwl_rate_scale_priv *lq;
IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n");
- memset(extra, 0, sizeof(*extra));
-
- fc = le16_to_cpu(hdr->frame_control);
- if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) {
- /* Send management frames and broadcast/multicast data using
- * lowest rate. */
- /* TODO: this could probably be improved.. */
- return rs_get_lowest_rate(local);
- }
-
sta = sta_info_get(local, hdr->addr1);
if (!sta || !sta->rate_ctrl_priv) {
+ sel->rate = rate_lowest(local, local->oper_hw_mode, sta);
if (sta)
sta_info_put(sta);
- return rs_get_lowest_rate(local);
+ return;
}
lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv;
@@ -1768,11 +1740,13 @@
}
done:
+ if ((i < 0) || (i > IWL_RATE_COUNT)) {
+ sel->rate = rate_lowest(local, local->oper_hw_mode, sta);
+ return;
+ }
sta_info_put(sta);
- if ((i < 0) || (i > IWL_RATE_COUNT))
- return rs_get_lowest_rate(local);
- return &priv->ieee_rates[i];
+ sel->rate = &priv->ieee_rates[i];
}
static void *rs_alloc_sta(void *priv, gfp_t gfp)