X-Git-Url: https://git.rohieb.name/openwrt.git/blobdiff_plain/0e9ca337996b5b4ef392bc92cde7f4bc9699b3ea..613e530afeab2eb78d7b4100420fd305662beab1:/package/madwifi/patches-r3776/309-performance.patch

diff --git a/package/madwifi/patches-r3776/309-performance.patch b/package/madwifi/patches-r3776/309-performance.patch
new file mode 100644
index 000000000..517c336be
--- /dev/null
+++ b/package/madwifi/patches-r3776/309-performance.patch
@@ -0,0 +1,221 @@
+Index: madwifi-trunk-r3776/ath/if_ath.c
+===================================================================
+--- madwifi-trunk-r3776.orig/ath/if_ath.c	2008-07-17 02:23:00.000000000 +0200
++++ madwifi-trunk-r3776/ath/if_ath.c	2008-07-17 02:28:06.000000000 +0200
+@@ -3334,7 +3334,6 @@
+ 	struct ath_softc *sc = dev->priv;
+ 	struct ieee80211_node *ni = NULL;
+ 	struct ath_buf *bf = NULL;
+-	struct ether_header *eh;
+ 	ath_bufhead bf_head;
+ 	struct ath_buf *tbf;
+ 	struct sk_buff *tskb;
+@@ -3349,6 +3348,7 @@
+ 	*/
+ 	int requeue = 0;
+ #ifdef ATH_SUPERG_FF
++	struct ether_header *eh;
+ 	unsigned int pktlen;
+ 	struct ieee80211com *ic = &sc->sc_ic;
+ 	struct ath_txq *txq = NULL;
+Index: madwifi-trunk-r3776/net80211/ieee80211_output.c
+===================================================================
+--- madwifi-trunk-r3776.orig/net80211/ieee80211_output.c	2008-07-17 00:21:29.000000000 +0200
++++ madwifi-trunk-r3776/net80211/ieee80211_output.c	2008-07-17 02:35:10.000000000 +0200
+@@ -280,7 +280,7 @@
+ 	 * normal vap. */
+ 	if (vap->iv_xrvap && (ni == vap->iv_bss) &&
+ 	    vap->iv_xrvap->iv_sta_assoc) {
+-		struct sk_buff *skb1 = skb_copy(skb, GFP_ATOMIC);
++		struct sk_buff *skb1 = skb_clone(skb, GFP_ATOMIC);
+ 		if (skb1) {
+ 			memset(SKB_CB(skb1), 0, sizeof(struct ieee80211_cb));
+ #ifdef IEEE80211_DEBUG_REFCNT
+@@ -561,7 +561,7 @@
+ 	struct ieee80211_key *key, struct sk_buff *skb, int ismulticast)
+ {
+ 	/* XXX pre-calculate per node? */
+-	int need_headroom = LLC_SNAPFRAMELEN + hdrsize + IEEE80211_ADDR_LEN;
++	int need_headroom = LLC_SNAPFRAMELEN + hdrsize;
+ 	int need_tailroom = 0;
+ #ifdef ATH_SUPERG_FF
+ 	int isff = ATH_FF_MAGIC_PRESENT(skb);
+@@ -603,109 +603,56 @@
+ 				need_tailroom += cip->ic_miclen;
+ 	}
+ 
+-	if (skb_shared(skb)) {
+-		/* Take our own reference to the node in the clone */
+-		ieee80211_ref_node(SKB_NI(skb));
+-		/* Unshare the node, decrementing users in the old skb */
+-		skb = skb_unshare(skb, GFP_ATOMIC);
++	need_headroom -= skb_headroom(skb);
++	if (isff)
++		need_tailroom -= skb_tailroom(skb2);
++	else
++		need_tailroom -= skb_tailroom(skb);
++
++	if (need_headroom < 0)
++		need_headroom = 0;
++	if (need_tailroom < 0)
++		need_tailroom = 0;
++
++	if (skb_cloned(skb) || (need_headroom > 0) ||
++		(!isff && (need_tailroom > 0))) {
++
++		if (pskb_expand_head(skb, need_headroom, need_tailroom, GFP_ATOMIC)) {
++			IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
++				"%s: cannot expand storage (tail)\n", __func__);
++			goto error;
++		}
+ 	}
+ 
+ #ifdef ATH_SUPERG_FF
+ 	if (isff) {
+-		if (skb == NULL) {
+-			IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
+-				"%s: cannot unshare for encapsulation\n",
+-				__func__);
+-			vap->iv_stats.is_tx_nobuf++;
+-			ieee80211_dev_kfree_skb(&skb2);
+-
+-			return NULL;
+-		}
++		inter_headroom -= skb_headroom(skb2);
++		if (inter_headroom < 0)
++			inter_headroom = 0;
++		if ((skb_cloned(skb2) ||
++			(inter_headroom > 0) || (need_tailroom > 0))) {
+ 
+-		/* first skb header */
+-		if (skb_headroom(skb) < need_headroom) {
+-			struct sk_buff *tmp = skb;
+-			skb = skb_realloc_headroom(skb, need_headroom);
+-			if (skb == NULL) {
++			if (pskb_expand_head(skb2, inter_headroom,
++				need_tailroom, GFP_ATOMIC)) {
+ 				IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
+-					"%s: cannot expand storage (head1)\n",
+-					__func__);
+-				vap->iv_stats.is_tx_nobuf++;
+-				ieee80211_dev_kfree_skb(&skb2);
+-				return NULL;
+-			} else
+-				ieee80211_skb_copy_noderef(tmp, skb);
+-			ieee80211_dev_kfree_skb(&tmp);
+-			/* NB: cb[] area was copied, but not next ptr. must do that
+-			 *     prior to return on success. */
+-		}
+-
+-		/* second skb with header and tail adjustments possible */
+-		if (skb_tailroom(skb2) < need_tailroom) {
+-			int n = 0;
+-			if (inter_headroom > skb_headroom(skb2))
+-				n = inter_headroom - skb_headroom(skb2);
+-			if (pskb_expand_head(skb2, n,
+-			    need_tailroom - skb_tailroom(skb2), GFP_ATOMIC)) {
+-				ieee80211_dev_kfree_skb(&skb2);
+-				IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
+-					"%s: cannot expand storage (tail2)\n",
+-					__func__);
+-				vap->iv_stats.is_tx_nobuf++;
+-				/* this shouldn't happen, but don't send first ff either */
+-				ieee80211_dev_kfree_skb(&skb);
++					"%s: cannot expand storage (tail)\n", __func__);
++				goto error;
+ 			}
+-		} else if (skb_headroom(skb2) < inter_headroom) {
+-			struct sk_buff *tmp = skb2;
+-
+-			skb2 = skb_realloc_headroom(skb2, inter_headroom);
+-			if (skb2 == NULL) {
+-				IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
+-					"%s: cannot expand storage (head2)\n",
+-					__func__);
+-				vap->iv_stats.is_tx_nobuf++;
+-				/* this shouldn't happen, but don't send first ff either */
+-				ieee80211_dev_kfree_skb(&skb);
+-				skb = NULL;
+-			} else
+-				ieee80211_skb_copy_noderef(tmp, skb);
+-			ieee80211_dev_kfree_skb(&tmp);
+ 		}
+-		if (skb) {
+-			skb->next = skb2;
+-		}
+-		return skb;
++		skb->next = skb2;
+ 	}
+ #endif /* ATH_SUPERG_FF */
+-	if (skb == NULL) {
+-		IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
+-			"%s: cannot unshare for encapsulation\n", __func__);
+-		vap->iv_stats.is_tx_nobuf++;
+-	} else if (skb_tailroom(skb) < need_tailroom) {
+-		int n = 0;
+-		if (need_headroom > skb_headroom(skb))
+-			n = need_headroom - skb_headroom(skb);
+-		if (pskb_expand_head(skb, n, need_tailroom - 
+-					skb_tailroom(skb), GFP_ATOMIC)) {
+-			IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
+-				"%s: cannot expand storage (tail)\n", __func__);
+-			vap->iv_stats.is_tx_nobuf++;
+-			ieee80211_dev_kfree_skb(&skb);
+-		}
+-	} else if (skb_headroom(skb) < need_headroom) {
+-		struct sk_buff *tmp = skb;
+-		skb = skb_realloc_headroom(skb, need_headroom);
+-		/* Increment reference count after copy */
+-		if (skb == NULL) {
+-			IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
+-				"%s: cannot expand storage (head)\n", __func__);
+-			vap->iv_stats.is_tx_nobuf++;
+-		} else
+-			ieee80211_skb_copy_noderef(tmp, skb);
+-		ieee80211_dev_kfree_skb(&tmp);
+-	}
+ 
+ 	return skb;
++
++error:
++	vap->iv_stats.is_tx_nobuf++;
++	ieee80211_dev_kfree_skb(&skb);
++#ifdef ATH_SUPERG_FF
++	if (skb2)
++		ieee80211_dev_kfree_skb(&skb2);
++#endif
++	return NULL;
+ }
+ 
+ #define	KEY_UNDEFINED(k)	((k).wk_cipher == &ieee80211_cipher_none)
+Index: madwifi-trunk-r3776/net80211/ieee80211_input.c
+===================================================================
+--- madwifi-trunk-r3776.orig/net80211/ieee80211_input.c	2008-07-17 02:20:52.000000000 +0200
++++ madwifi-trunk-r3776/net80211/ieee80211_input.c	2008-07-17 02:30:28.000000000 +0200
+@@ -713,7 +713,7 @@
+ 			/* ether_type must be length as FF frames are always LLC/SNAP encap'd */ 
+ 			frame_len = ntohs(eh_tmp->ether_type); 
+ 
+-			skb1 = skb_copy(skb, GFP_ATOMIC);
++			skb1 = skb_clone(skb, GFP_ATOMIC);
+ 			if (skb1 == NULL)
+ 				goto err;
+ 			ieee80211_skb_copy_noderef(skb, skb1);
+@@ -1118,7 +1118,7 @@
+ 
+ 		if (ETHER_IS_MULTICAST(eh->ether_dhost) && !netif_queue_stopped(dev)) {
+ 			/* Create a SKB for the BSS to send out. */
+-			skb1 = skb_copy(skb, GFP_ATOMIC);
++			skb1 = skb_clone(skb, GFP_ATOMIC);
+ 			if (skb1)
+ 				SKB_NI(skb1) = ieee80211_ref_node(vap->iv_bss); 
+ 		}
+@@ -2265,7 +2265,7 @@
+ 	if (filter_type && ((vap->app_filter & filter_type) == filter_type)) {
+ 		struct sk_buff *skb1;
+ 
+-		skb1 = skb_copy(skb, GFP_ATOMIC);
++		skb1 = skb_clone(skb, GFP_ATOMIC);
+ 		if (skb1 == NULL)
+ 			return;
+ 		/* We duplicate the reference after skb_copy */