recipes-wifi/linux-mt76/files/patches/2003-wifi-mt76-mt7915-wed-find-rx-token-by-physical-addre.patch

From 2423861357760af2716618d87d65a8d1dff7319c Mon Sep 17 00:00:00 2001
From: Sujuan Chen <sujuan.chen@mediatek.com>
Date: Fri, 25 Nov 2022 14:32:35 +0800
Subject: [PATCH 2003/2010] 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.

Signed-off-by: Peter Chiu <chui-hao.chiu@mediatek.com>
---
 dma.c | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/dma.c b/dma.c
index fc92e391..3047f8ba 100644
--- a/dma.c
+++ b/dma.c
@@ -403,9 +403,32 @@ mt76_dma_get_buf(struct mt76_dev *dev, struct mt76_queue *q, int idx,
 
 	if (mt76_queue_is_wed_rx(q)) {
 		u32 buf1 = le32_to_cpu(desc->buf1);
+		u32 id, find = 0;
 		u32 token = FIELD_GET(MT_DMA_CTL_TOKEN, buf1);
-		struct mt76_txwi_cache *t = mt76_rx_token_release(dev, token);
+		struct mt76_txwi_cache *t;
+
+		if (*more) {
+			spin_lock_bh(&dev->rx_token_lock);
+
+			idr_for_each_entry(&dev->rx_token, t, id) {
+				if (t->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;
+		}
 
+		t = mt76_rx_token_release(dev, token);
 		if (!t)
 			return NULL;
 
-- 
2.39.2