From df93d53a4b7a5ce284dc0c6509057979f233cb92 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sat, 14 May 2016 17:38:56 +0200 Subject: mac80211: update to wireless-testing 2016-05-12 Signed-off-by: Felix Fietkau --- .../322-mac80211-add-A-MSDU-tx-support.patch | 317 --------------------- 1 file changed, 317 deletions(-) delete mode 100644 package/kernel/mac80211/patches/322-mac80211-add-A-MSDU-tx-support.patch (limited to 'package/kernel/mac80211/patches/322-mac80211-add-A-MSDU-tx-support.patch') diff --git a/package/kernel/mac80211/patches/322-mac80211-add-A-MSDU-tx-support.patch b/package/kernel/mac80211/patches/322-mac80211-add-A-MSDU-tx-support.patch deleted file mode 100644 index e7bfb9c83d..0000000000 --- a/package/kernel/mac80211/patches/322-mac80211-add-A-MSDU-tx-support.patch +++ /dev/null @@ -1,317 +0,0 @@ -From: Felix Fietkau -Date: Fri, 5 Feb 2016 01:38:51 +0100 -Subject: [PATCH] mac80211: add A-MSDU tx support - -Requires software tx queueing support. frag_list support (for zero-copy) -is optional. - -Signed-off-by: Felix Fietkau ---- - ---- a/include/net/mac80211.h -+++ b/include/net/mac80211.h -@@ -709,6 +709,7 @@ enum mac80211_tx_info_flags { - * @IEEE80211_TX_CTRL_PS_RESPONSE: This frame is a response to a poll - * frame (PS-Poll or uAPSD). - * @IEEE80211_TX_CTRL_RATE_INJECT: This frame is injected with rate information -+ * @IEEE80211_TX_CTRL_AMSDU: This frame is an A-MSDU frame - * - * These flags are used in tx_info->control.flags. - */ -@@ -716,6 +717,7 @@ enum mac80211_tx_control_flags { - IEEE80211_TX_CTRL_PORT_CTRL_PROTO = BIT(0), - IEEE80211_TX_CTRL_PS_RESPONSE = BIT(1), - IEEE80211_TX_CTRL_RATE_INJECT = BIT(2), -+ IEEE80211_TX_CTRL_AMSDU = BIT(3), - }; - - /* -@@ -1728,6 +1730,7 @@ struct ieee80211_sta_rates { - * size is min(max_amsdu_len, 7935) bytes. - * Both additional HT limits must be enforced by the low level driver. - * This is defined by the spec (IEEE 802.11-2012 section 8.3.2.2 NOTE 2). -+ * @max_rc_amsdu_len: Maximum A-MSDU size in bytes recommended by rate control. - * @txq: per-TID data TX queues (if driver uses the TXQ abstraction) - */ - struct ieee80211_sta { -@@ -1748,6 +1751,7 @@ struct ieee80211_sta { - bool mfp; - u8 max_amsdu_subframes; - u16 max_amsdu_len; -+ u16 max_rc_amsdu_len; - - struct ieee80211_txq *txq[IEEE80211_NUM_TIDS]; - -@@ -1961,6 +1965,15 @@ struct ieee80211_txq { - * order and does not need to manage its own reorder buffer or BA session - * timeout. - * -+ * @IEEE80211_HW_TX_AMSDU: Hardware (or driver) supports software aggregated -+ * A-MSDU frames. Requires software tx queueing and fast-xmit support. -+ * When not using minstrel/minstrel_ht rate control, the driver should -+ * limit the maximum A-MSDU size based on the current tx rate by setting -+ * max_rc_amsdu_len in struct ieee80211_sta. -+ * -+ * @IEEE80211_HW_TX_FRAG_LIST: Hardware (or driver) supports sending frag_list -+ * skbs, needed for zero-copy software A-MSDU. -+ * - * @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays - */ - enum ieee80211_hw_flags { -@@ -1998,6 +2011,8 @@ enum ieee80211_hw_flags { - IEEE80211_HW_BEACON_TX_STATUS, - IEEE80211_HW_NEEDS_UNIQUE_STA_ADDR, - IEEE80211_HW_SUPPORTS_REORDERING_BUFFER, -+ IEEE80211_HW_TX_AMSDU, -+ IEEE80211_HW_TX_FRAG_LIST, - - /* keep last, obviously */ - NUM_IEEE80211_HW_FLAGS -@@ -2070,6 +2085,9 @@ enum ieee80211_hw_flags { - * size is smaller (an example is LinkSys WRT120N with FW v1.0.07 - * build 002 Jun 18 2012). - * -+ * @max_tx_fragments: maximum number of tx buffers per (A)-MSDU, sum -+ * of 1 + skb_shinfo(skb)->nr_frags for each skb in the frag_list. -+ * - * @offchannel_tx_hw_queue: HW queue ID to use for offchannel TX - * (if %IEEE80211_HW_QUEUE_CONTROL is set) - * -@@ -2124,6 +2142,7 @@ struct ieee80211_hw { - u8 max_rate_tries; - u8 max_rx_aggregation_subframes; - u8 max_tx_aggregation_subframes; -+ u8 max_tx_fragments; - u8 offchannel_tx_hw_queue; - u8 radiotap_mcs_details; - u16 radiotap_vht_details; ---- a/net/mac80211/agg-tx.c -+++ b/net/mac80211/agg-tx.c -@@ -935,6 +935,7 @@ void ieee80211_process_addba_resp(struct - size_t len) - { - struct tid_ampdu_tx *tid_tx; -+ struct ieee80211_txq *txq; - u16 capab, tid; - u8 buf_size; - bool amsdu; -@@ -945,6 +946,10 @@ void ieee80211_process_addba_resp(struct - buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6; - buf_size = min(buf_size, local->hw.max_tx_aggregation_subframes); - -+ txq = sta->sta.txq[tid]; -+ if (!amsdu && txq) -+ set_bit(IEEE80211_TXQ_NO_AMSDU, &to_txq_info(txq)->flags); -+ - mutex_lock(&sta->ampdu_mlme.mtx); - - tid_tx = rcu_dereference_protected_tid_tx(sta, tid); ---- a/net/mac80211/debugfs.c -+++ b/net/mac80211/debugfs.c -@@ -127,6 +127,8 @@ static const char *hw_flag_names[NUM_IEE - FLAG(BEACON_TX_STATUS), - FLAG(NEEDS_UNIQUE_STA_ADDR), - FLAG(SUPPORTS_REORDERING_BUFFER), -+ FLAG(TX_AMSDU), -+ FLAG(TX_FRAG_LIST), - - /* keep last for the build bug below */ - (void *)0x1 ---- a/net/mac80211/ieee80211_i.h -+++ b/net/mac80211/ieee80211_i.h -@@ -799,6 +799,7 @@ struct mac80211_qos_map { - enum txq_info_flags { - IEEE80211_TXQ_STOP, - IEEE80211_TXQ_AMPDU, -+ IEEE80211_TXQ_NO_AMSDU, - }; - - struct txq_info { ---- a/net/mac80211/tx.c -+++ b/net/mac80211/tx.c -@@ -1318,6 +1318,10 @@ struct sk_buff *ieee80211_tx_dequeue(str - out: - spin_unlock_bh(&txqi->queue.lock); - -+ if (skb && skb_has_frag_list(skb) && -+ !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) -+ skb_linearize(skb); -+ - return skb; - } - EXPORT_SYMBOL(ieee80211_tx_dequeue); -@@ -2757,6 +2761,163 @@ void ieee80211_clear_fast_xmit(struct st - kfree_rcu(fast_tx, rcu_head); - } - -+static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local, -+ struct sk_buff *skb, int headroom, -+ int *subframe_len) -+{ -+ int amsdu_len = *subframe_len + sizeof(struct ethhdr); -+ int padding = (4 - amsdu_len) & 3; -+ -+ if (skb_headroom(skb) < headroom || skb_tailroom(skb) < padding) { -+ I802_DEBUG_INC(local->tx_expand_skb_head); -+ -+ if (pskb_expand_head(skb, headroom, padding, GFP_ATOMIC)) { -+ wiphy_debug(local->hw.wiphy, -+ "failed to reallocate TX buffer\n"); -+ return false; -+ } -+ } -+ -+ if (padding) { -+ *subframe_len += padding; -+ memset(skb_put(skb, padding), 0, padding); -+ } -+ -+ return true; -+} -+ -+static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata, -+ struct ieee80211_fast_tx *fast_tx, -+ struct sk_buff *skb) -+{ -+ struct ieee80211_local *local = sdata->local; -+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); -+ struct ieee80211_hdr *hdr; -+ struct ethhdr amsdu_hdr; -+ int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header); -+ int subframe_len = skb->len - hdr_len; -+ void *data; -+ u8 *qc; -+ -+ if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) -+ return false; -+ -+ if (info->control.flags & IEEE80211_TX_CTRL_AMSDU) -+ return true; -+ -+ if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(amsdu_hdr), -+ &subframe_len)) -+ return false; -+ -+ amsdu_hdr.h_proto = cpu_to_be16(subframe_len); -+ memcpy(amsdu_hdr.h_source, skb->data + fast_tx->sa_offs, ETH_ALEN); -+ memcpy(amsdu_hdr.h_dest, skb->data + fast_tx->da_offs, ETH_ALEN); -+ -+ data = skb_push(skb, sizeof(amsdu_hdr)); -+ memmove(data, data + sizeof(amsdu_hdr), hdr_len); -+ memcpy(data + hdr_len, &amsdu_hdr, sizeof(amsdu_hdr)); -+ -+ hdr = data; -+ qc = ieee80211_get_qos_ctl(hdr); -+ *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; -+ -+ info->control.flags |= IEEE80211_TX_CTRL_AMSDU; -+ -+ return true; -+} -+ -+static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata, -+ struct sta_info *sta, -+ struct ieee80211_fast_tx *fast_tx, -+ struct sk_buff *skb) -+{ -+ struct ieee80211_local *local = sdata->local; -+ u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; -+ struct ieee80211_txq *txq = sta->sta.txq[tid]; -+ struct txq_info *txqi; -+ struct sk_buff **frag_tail, *head; -+ int subframe_len = skb->len - ETH_ALEN; -+ u8 max_subframes = sta->sta.max_amsdu_subframes; -+ int max_frags = local->hw.max_tx_fragments; -+ int max_amsdu_len = sta->sta.max_amsdu_len; -+ __be16 len; -+ void *data; -+ bool ret = false; -+ int n = 1, nfrags; -+ -+ if (!ieee80211_hw_check(&local->hw, TX_AMSDU)) -+ return false; -+ -+ if (!txq) -+ return false; -+ -+ txqi = to_txq_info(txq); -+ if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags)) -+ return false; -+ -+ if (sta->sta.max_rc_amsdu_len) -+ max_amsdu_len = min_t(int, max_amsdu_len, -+ sta->sta.max_rc_amsdu_len); -+ -+ spin_lock_bh(&txqi->queue.lock); -+ -+ head = skb_peek_tail(&txqi->queue); -+ if (!head) -+ goto out; -+ -+ if (skb->len + head->len > max_amsdu_len) -+ goto out; -+ -+ /* -+ * HT A-MPDU limits maximum MPDU size to 4095 bytes. Since aggregation -+ * sessions are started/stopped without txq flush, use the limit here -+ * to avoid having to de-aggregate later. -+ */ -+ if (skb->len + head->len > 4095 && -+ !sta->sta.vht_cap.vht_supported) -+ goto out; -+ -+ if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head)) -+ goto out; -+ -+ nfrags = 1 + skb_shinfo(skb)->nr_frags; -+ nfrags += 1 + skb_shinfo(head)->nr_frags; -+ frag_tail = &skb_shinfo(head)->frag_list; -+ while (*frag_tail) { -+ nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags; -+ frag_tail = &(*frag_tail)->next; -+ n++; -+ } -+ -+ if (max_subframes && n > max_subframes) -+ goto out; -+ -+ if (max_frags && nfrags > max_frags) -+ goto out; -+ -+ if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) + 2, -+ &subframe_len)) -+ return false; -+ -+ ret = true; -+ data = skb_push(skb, ETH_ALEN + 2); -+ memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN); -+ -+ data += 2 * ETH_ALEN; -+ len = cpu_to_be16(subframe_len); -+ memcpy(data, &len, 2); -+ memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header)); -+ -+ head->len += skb->len; -+ head->data_len += skb->len; -+ *frag_tail = skb; -+ -+out: -+ spin_unlock_bh(&txqi->queue.lock); -+ -+ return ret; -+} -+ - static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata, - struct net_device *dev, struct sta_info *sta, - struct ieee80211_fast_tx *fast_tx, -@@ -2811,6 +2972,10 @@ static bool ieee80211_xmit_fast(struct i - - ieee80211_tx_stats(dev, skb->len + extra_head); - -+ if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) && -+ ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb)) -+ return true; -+ - /* will not be crypto-handled beyond what we do here, so use false - * as the may-encrypt argument for the resize to not account for - * more room than we already have in 'extra_head' -- cgit v1.2.3