mac80211: update to wireless-testing 2016-06-20

Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 235 insertions, 0 deletions

diff --git a/package/kernel/mac80211/patches/307-mac80211-add-NEED_ALIGNED4_SKBS-hw-flag.patch b/package/kernel/mac80211/patches/307-mac80211-add-NEED_ALIGNED4_SKBS-hw-flag.patch
new file mode 100644
index 0000000..eeb881e
--- /dev/null
+++ b/package/kernel/mac80211/patches/307-mac80211-add-NEED_ALIGNED4_SKBS-hw-flag.patch
@@ -0,0 +1,235 @@
+From: Janusz Dziedzic <janusz.dziedzic@tieto.com>
+Date: Fri, 19 Feb 2016 11:01:50 +0100
+Subject: [PATCH] mac80211: add NEED_ALIGNED4_SKBS hw flag
+
+HW/driver should set NEED_ALIGNED4_SKBS flag in case
+require aligned skbs to four-byte boundaries.
+This affect only TX direction.
+
+Padding is added after ieee80211_hdr, before IV/LLC.
+
+Before we have to do memmove(hdrlen) twice in the
+dirver. Once before we pass this to HW and next
+in tx completion (to be sure monitor will report
+this tx frame correctly).
+
+With this patch we can skip this memmove() and save CPU.
+
+Currently this was tested with ath9k, both hw/sw crypt for
+wep/tkip/ccmp.
+
+Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
+---
+
+--- a/include/net/mac80211.h
++++ b/include/net/mac80211.h
+@@ -2014,6 +2014,9 @@ struct ieee80211_txq {
+  * @IEEE80211_HW_TX_FRAG_LIST: Hardware (or driver) supports sending frag_list
+  *	skbs, needed for zero-copy software A-MSDU.
+  *
++ * @IEEE80211_HW_NEEDS_ALIGNED4_SKBS: Driver need aligned skbs to four-byte.
++ *	Padding will be added after ieee80211_hdr, before IV/LLC.
++ *
+  * @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays
+  */
+ enum ieee80211_hw_flags {
+@@ -2054,6 +2057,7 @@ enum ieee80211_hw_flags {
+ 	IEEE80211_HW_USES_RSS,
+ 	IEEE80211_HW_TX_AMSDU,
+ 	IEEE80211_HW_TX_FRAG_LIST,
++	IEEE80211_HW_NEEDS_ALIGNED4_SKBS,
+ 
+ 	/* keep last, obviously */
+ 	NUM_IEEE80211_HW_FLAGS
+--- a/net/mac80211/debugfs.c
++++ b/net/mac80211/debugfs.c
+@@ -302,6 +302,7 @@ static const char *hw_flag_names[] = {
+ 	FLAG(USES_RSS),
+ 	FLAG(TX_AMSDU),
+ 	FLAG(TX_FRAG_LIST),
++	FLAG(NEEDS_ALIGNED4_SKBS),
+ #undef FLAG
+ };
+ 
+--- a/net/mac80211/ieee80211_i.h
++++ b/net/mac80211/ieee80211_i.h
+@@ -1497,6 +1497,29 @@ ieee80211_have_rx_timestamp(struct ieee8
+ 	return false;
+ }
+ 
++static inline unsigned int
++ieee80211_hdr_padsize(struct ieee80211_hw *hw, unsigned int hdrlen)
++{
++	/*
++	 * While hdrlen is already aligned to two-byte boundaries,
++	 * simple check with & 2 will return correct padsize.
++	 */
++	if (ieee80211_hw_check(hw, NEEDS_ALIGNED4_SKBS))
++		return hdrlen & 2;
++	return 0;
++}
++
++static inline unsigned int
++ieee80211_padded_hdrlen(struct ieee80211_hw *hw, __le16 fc)
++{
++	unsigned int hdrlen;
++
++	hdrlen = ieee80211_hdrlen(fc);
++	hdrlen += ieee80211_hdr_padsize(hw, hdrlen);
++
++	return hdrlen;
++}
++
+ u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
+ 				     struct ieee80211_rx_status *status,
+ 				     unsigned int mpdu_len,
+--- a/net/mac80211/sta_info.h
++++ b/net/mac80211/sta_info.h
+@@ -279,7 +279,7 @@ struct ieee80211_fast_tx {
+ 	u8 hdr_len;
+ 	u8 sa_offs, da_offs, pn_offs;
+ 	u8 band;
+-	u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
++	u8 hdr[30 + 2 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
+ 	       sizeof(rfc1042_header)] __aligned(2);
+ 
+ 	struct rcu_head rcu_head;
+--- a/net/mac80211/status.c
++++ b/net/mac80211/status.c
+@@ -683,9 +683,22 @@ void ieee80211_tx_monitor(struct ieee802
+ 	struct sk_buff *skb2;
+ 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ 	struct ieee80211_sub_if_data *sdata;
++	struct ieee80211_hdr *hdr = (void *)skb->data;
+ 	struct net_device *prev_dev = NULL;
++	unsigned int hdrlen, padsize;
+ 	int rtap_len;
+ 
++	/* Remove padding if was added */
++	if (ieee80211_hw_check(&local->hw, NEEDS_ALIGNED4_SKBS)) {
++		hdrlen = ieee80211_hdrlen(hdr->frame_control);
++		padsize = ieee80211_hdr_padsize(&local->hw, hdrlen);
++
++		if (padsize && skb->len > hdrlen + padsize) {
++			memmove(skb->data + padsize, skb->data, hdrlen);
++			skb_pull(skb, padsize);
++		}
++	}
++
+ 	/* send frame to monitor interfaces now */
+ 	rtap_len = ieee80211_tx_radiotap_len(info);
+ 	if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
+--- a/net/mac80211/tkip.c
++++ b/net/mac80211/tkip.c
+@@ -201,10 +201,12 @@ void ieee80211_get_tkip_p2k(struct ieee8
+ {
+ 	struct ieee80211_key *key = (struct ieee80211_key *)
+ 			container_of(keyconf, struct ieee80211_key, conf);
++	struct ieee80211_hw *hw = &key->local->hw;
+ 	const u8 *tk = &key->conf.key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY];
+ 	struct tkip_ctx *ctx = &key->u.tkip.tx;
+ 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+-	const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control);
++	const u8 *data = (u8 *)hdr + ieee80211_padded_hdrlen(hw,
++							hdr->frame_control);
+ 	u32 iv32 = get_unaligned_le32(&data[4]);
+ 	u16 iv16 = data[2] | (data[0] << 8);
+ 
+--- a/net/mac80211/tx.c
++++ b/net/mac80211/tx.c
+@@ -1173,8 +1173,7 @@ ieee80211_tx_prepare(struct ieee80211_su
+ 	info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
+ 
+ 	hdr = (struct ieee80211_hdr *) skb->data;
+-
+-	tx->hdrlen = ieee80211_hdrlen(hdr->frame_control);
++	tx->hdrlen = ieee80211_padded_hdrlen(&local->hw, hdr->frame_control);
+ 
+ 	if (likely(sta)) {
+ 		if (!IS_ERR(sta))
+@@ -2108,7 +2107,7 @@ netdev_tx_t ieee80211_monitor_start_xmit
+ 		goto fail;
+ 
+ 	hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
+-	hdrlen = ieee80211_hdrlen(hdr->frame_control);
++	hdrlen = ieee80211_padded_hdrlen(&local->hw, hdr->frame_control);
+ 
+ 	if (skb->len < len_rthdr + hdrlen)
+ 		goto fail;
+@@ -2334,7 +2333,7 @@ static struct sk_buff *ieee80211_build_h
+ 	struct ieee80211_chanctx_conf *chanctx_conf;
+ 	struct ieee80211_sub_if_data *ap_sdata;
+ 	enum nl80211_band band;
+-	int ret;
++	int padsize, ret;
+ 
+ 	if (IS_ERR(sta))
+ 		sta = NULL;
+@@ -2554,6 +2553,9 @@ static struct sk_buff *ieee80211_build_h
+ 		hdrlen += 2;
+ 	}
+ 
++	/* Check aligned4 skb required */
++	padsize = ieee80211_hdr_padsize(&sdata->local->hw, hdrlen);
++
+ 	/*
+ 	 * Drop unicast frames to unauthorised stations unless they are
+ 	 * EAPOL frames from the local station.
+@@ -2640,6 +2642,7 @@ static struct sk_buff *ieee80211_build_h
+ 	h_pos -= skip_header_bytes;
+ 
+ 	head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
++	head_need += padsize;
+ 
+ 	/*
+ 	 * So we need to modify the skb header and hence need a copy of
+@@ -2678,6 +2681,9 @@ static struct sk_buff *ieee80211_build_h
+ 	}
+ #endif
+ 
++	if (padsize)
++		memset(skb_push(skb, padsize), 0, padsize);
++
+ 	if (ieee80211_is_data_qos(fc)) {
+ 		__le16 *qos_control;
+ 
+@@ -2691,8 +2697,8 @@ static struct sk_buff *ieee80211_build_h
+ 	} else
+ 		memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
+ 
+-	nh_pos += hdrlen;
+-	h_pos += hdrlen;
++	nh_pos += hdrlen + padsize;
++	h_pos += hdrlen + padsize;
+ 
+ 	/* Update skb pointers to various headers since this modified frame
+ 	 * is going to go through Linux networking code that may potentially
+@@ -2861,6 +2867,9 @@ void ieee80211_check_fast_xmit(struct st
+ 		fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
+ 	}
+ 
++	/* Check aligned4 skb required */
++	build.hdr_len += ieee80211_hdr_padsize(&local->hw, build.hdr_len);
++
+ 	/* We store the key here so there's no point in using rcu_dereference()
+ 	 * but that's fine because the code that changes the pointers will call
+ 	 * this function after doing so. For a single CPU that would be enough,
+--- a/net/mac80211/util.c
++++ b/net/mac80211/util.c
+@@ -1224,6 +1224,7 @@ void ieee80211_send_auth(struct ieee8021
+ 			 u32 tx_flags)
+ {
+ 	struct ieee80211_local *local = sdata->local;
++	struct ieee80211_hw *hw = &local->hw;
+ 	struct sk_buff *skb;
+ 	struct ieee80211_mgmt *mgmt;
+ 	unsigned int hdrlen;
+@@ -1251,7 +1252,7 @@ void ieee80211_send_auth(struct ieee8021
+ 		memcpy(skb_put(skb, extra_len), extra, extra_len);
+ 
+ 	if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
+-		hdrlen = ieee80211_hdrlen(mgmt->frame_control);
++		hdrlen = ieee80211_padded_hdrlen(hw, mgmt->frame_control);
+ 		mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
+ 		err = ieee80211_wep_encrypt(local, skb, hdrlen, key,
+ 					    key_len, key_idx);