Chips like QCA9984, IPQ4019 doesn't do duplicate detection in firmware.
Implement it in driver so it can skip a check in mac80211.
Check only the first skb since all the skbs in amsdu share the same
header.
Tested-on: QCA9984 10.4-3.9.0.2-00159
Signed-off-by: Zhi-Jun You <hujy652@xxxxxxxxx>
---
I am not sure what's the formal name for chips like QCA9984 so I will
call it non-offloaded PCIe for now.
---
drivers/net/wireless/ath/ath10k/core.h | 1 +
drivers/net/wireless/ath/ath10k/htt_rx.c | 51 ++++++++++++++++++++++++
drivers/net/wireless/ath/ath10k/txrx.c | 3 ++
3 files changed, 55 insertions(+)
diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index f5de8ce8fb45..6b4f5208f32f 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -436,6 +436,7 @@ struct ath10k_peer {
enum htt_security_types sec_type;
int pn_len;
} rx_pn[ATH10K_HTT_TXRX_PEER_SECURITY_MAX];
+ u16 last_rx_seq_ctrl[IEEE80211_NUM_TIDS + 1];
};
struct ath10k_txq {
diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c
index 438b0caaceb7..e241eab4cce1 100644
--- a/drivers/net/wireless/ath/ath10k/htt_rx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
@@ -1344,6 +1344,56 @@ static char *ath10k_get_tid(struct ieee80211_hdr *hdr, char *out, size_t size)
return out;
}
+static void ath10k_htt_rx_h_check_dup(struct ath10k *ar,
+ struct sk_buff_head *amsdu,
+ struct ieee80211_rx_status *status)
+{
+ struct ath10k_hw_params *hw = &ar->hw_params;
+ struct sk_buff *first;
+ struct ath10k_peer *peer;
+ struct ieee80211_hdr *hdr;
+ struct htt_rx_desc *rxd;
+ struct rx_mpdu_start *rxd_mpdu_start;
+ u16 peer_id;
+ u8 tid;
+
+ if (skb_queue_empty(amsdu))
+ return;
+
+ first = skb_peek(amsdu);
+ rxd = HTT_RX_BUF_TO_RX_DESC(hw,
+ (void *)first->data - hw->rx_desc_ops->rx_desc_size);
+
+ rxd_mpdu_start = ath10k_htt_rx_desc_get_mpdu_start(hw, rxd);
+ peer_id = MS(__le32_to_cpu(rxd_mpdu_start->info0),
+ RX_MPDU_START_INFO0_PEER_IDX);
+
+ spin_lock_bh(&ar->data_lock);
+
+ peer = ath10k_peer_find_by_id(ar, peer_id);
+ if (!peer)
+ goto out;
+
+ hdr = (void *)ath10k_htt_rx_desc_get_rx_hdr_status(hw, rxd);
+ if (ieee80211_is_data_qos(hdr->frame_control))
+ tid = ieee80211_get_tid(hdr);
+ else
+ tid = ATH10K_TXRX_NON_QOS_TID;
+
+ if (ieee80211_has_retry(hdr->frame_control) &&
+ peer->last_rx_seq_ctrl[tid] == __le16_to_cpu(hdr->seq_ctrl)) {
+ __skb_queue_purge(amsdu);
+ goto out;
+ }
+
+ peer->last_rx_seq_ctrl[tid] = __le16_to_cpu(hdr->seq_ctrl);
+
+ status->flag |= RX_FLAG_DUP_VALIDATED;
+
+out:
+ spin_unlock_bh(&ar->data_lock);
+}
+
static void ath10k_htt_rx_h_queue_msdu(struct ath10k *ar,
struct ieee80211_rx_status *rx_status,
struct sk_buff *skb)
@@ -2356,6 +2406,7 @@ static int ath10k_htt_rx_handle_amsdu(struct ath10k_htt *htt)
ath10k_htt_rx_h_unchain(ar, &amsdu, &drop_cnt, &unchain_cnt);
ath10k_htt_rx_h_filter(ar, &amsdu, rx_status, &drop_cnt_filter);
+ ath10k_htt_rx_h_check_dup(ar, &amsdu, rx_status);
ath10k_htt_rx_h_mpdu(ar, &amsdu, rx_status, true, first_hdr, &err, 0,
false);
msdus_to_queue = skb_queue_len(&amsdu);
diff --git a/drivers/net/wireless/ath/ath10k/txrx.c b/drivers/net/wireless/ath/ath10k/txrx.c
index da3bc35e41aa..a8b8186537f4 100644
--- a/drivers/net/wireless/ath/ath10k/txrx.c
+++ b/drivers/net/wireless/ath/ath10k/txrx.c
@@ -219,6 +219,7 @@ void ath10k_peer_map_event(struct ath10k_htt *htt,
{
struct ath10k *ar = htt->ar;
struct ath10k_peer *peer;
+ int i;
if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) {
ath10k_warn(ar,
@@ -237,6 +238,8 @@ void ath10k_peer_map_event(struct ath10k_htt *htt,
peer->vdev_id = ev->vdev_id;
ether_addr_copy(peer->addr, ev->addr);
list_add(&peer->list, &ar->peers);
+ for (i = 0; i <= IEEE80211_NUM_TIDS; i++)
+ peer->last_rx_sec_ctrl[i] = USHRT_MAX;
wake_up(&ar->peer_mapping_wq);
}
--
2.34.1
