recipes-wifi/linux-mt76/files/patches/3004-mt76-mt7915-wed-find-rx-token-by-physical-address.patch

From fc10309ea47b4d34ace30e6f4e7ff0c0ffa71db2 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 3004/3015] 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 | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/dma.c b/dma.c
index a6bb3730..b58579c5 100644
--- a/dma.c
+++ b/dma.c
@@ -402,10 +402,35 @@ mt76_dma_get_buf(struct mt76_dev *dev, struct mt76_queue *q, int idx,
 		*info = le32_to_cpu(desc->info);
 
 	if (mt76_queue_is_wed_rx(q)) {
+		__le32 buf1;
+		u32 id, find = 0;
 		u32 token = FIELD_GET(MT_DMA_CTL_TOKEN,
 				      le32_to_cpu(desc->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*/
+					buf1 = desc->buf1;
+					buf1 = le32_replace_bits(buf1, id,
+							MT_DMA_CTL_TOKEN);
+					WRITE_ONCE(desc->buf1, buf1);
+					break;
+				}
+			}
+
+			spin_unlock_bh(&dev->rx_token_lock);
+			if (!find)
+				return NULL;
+		}
 
+		t = mt76_rx_token_release(dev, token);
 		if (!t)
 			return NULL;
 
-- 
2.18.0