| From 3fd9079da8481df27e2ce65a99e3638bae6c7a33 Mon Sep 17 00:00:00 2001 |
| From: "sujuan.chen" <sujuan.chen@mediatek.com> |
| Date: Wed, 19 Jul 2023 10:55:09 +0800 |
| Subject: [PATCH 2007/2032] mtk: wifi: mt76: mt7915: wed: find rx token by |
| physical address |
| |
| The token id in RxDMAD may be incorrect when it is not the last frame due to |
| WED HW bug. Lookup correct token id by physical address in sdp0. |
| Add len == 0 check to drop garbage frames |
| |
| Signed-off-by: Peter Chiu <chui-hao.chiu@mediatek.com> |
| --- |
| dma.c | 27 +++++++++++++++++++++++++-- |
| 1 file changed, 25 insertions(+), 2 deletions(-) |
| |
| diff --git a/dma.c b/dma.c |
| index 89ae929f..6bfcee1a 100644 |
| --- a/dma.c |
| +++ b/dma.c |
| @@ -446,9 +446,32 @@ mt76_dma_get_buf(struct mt76_dev *dev, struct mt76_queue *q, int idx, |
| mt76_dma_should_drop_buf(drop, ctrl, buf1, desc_info); |
| |
| if (mt76_queue_is_wed_rx(q)) { |
| + u32 id, find = 0; |
| u32 token = FIELD_GET(MT_DMA_CTL_TOKEN, buf1); |
| - struct mt76_rxwi_cache *r = mt76_rx_token_release(dev, token); |
| + struct mt76_rxwi_cache *r; |
| + |
| + if (*more) { |
| + spin_lock_bh(&dev->rx_token_lock); |
| + |
| + idr_for_each_entry(&dev->rx_token, r, id) { |
| + if (r->dma_addr == le32_to_cpu(desc->buf0)) { |
| + find = 1; |
| + token = id; |
| + |
| + /* Write correct id back to DMA*/ |
| + u32p_replace_bits(&buf1, id, |
| + MT_DMA_CTL_TOKEN); |
| + WRITE_ONCE(desc->buf1, cpu_to_le32(buf1)); |
| + break; |
| + } |
| + } |
| |
| + spin_unlock_bh(&dev->rx_token_lock); |
| + if (!find) |
| + return NULL; |
| + } |
| + |
| + r = mt76_rx_token_release(dev, token); |
| if (!r) |
| return NULL; |
| |
| @@ -901,7 +924,7 @@ mt76_dma_rx_process(struct mt76_dev *dev, struct mt76_queue *q, int budget) |
| if (!data) |
| break; |
| |
| - if (drop) |
| + if (drop || (len == 0)) |
| goto free_frag; |
| |
| if (q->rx_head) |
| -- |
| 2.18.0 |
| |