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-rw-r--r--package/kernel/mac80211/patches/322-mac80211-add-A-MSDU-tx-support.patch317
1 files changed, 0 insertions, 317 deletions
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 <nbd@openwrt.org>
-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 <nbd@openwrt.org>
----
-
---- 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'
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-28 19:36:05 +0000