netdev - [PATCH v2 net-next 1/5] net: ethernet: mtk_wed: return status value in mtk_wdma_rx

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Message-Id: <b8284d47918e9b6a4a27b7757d2c9391d5a0c0aa.1669303154.git.lorenzo@kernel.org>
Date:   Thu, 24 Nov 2022 16:22:51 +0100
From:   Lorenzo Bianconi <lorenzo@...nel.org>
To:     netdev@...r.kernel.org
Cc:     nbd@....name, john@...ozen.org, sean.wang@...iatek.com,
        Mark-MC.Lee@...iatek.com, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, lorenzo.bianconi@...hat.com,
        sujuan.chen@...iatek.com, linux-mediatek@...ts.infradead.org
Subject: [PATCH v2 net-next 1/5] net: ethernet: mtk_wed: return status value in mtk_wdma_rx_reset

Move MTK_WDMA_RESET_IDX configuration in mtk_wdma_rx_reset routine.
Increase poll timeout to 10ms in order to be aligned with vendor sdk.
This is a preliminary patch to add Wireless Ethernet Dispatcher reset
support.

Co-developed-by: Sujuan Chen <sujuan.chen@...iatek.com>
Signed-off-by: Sujuan Chen <sujuan.chen@...iatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
 drivers/net/ethernet/mediatek/mtk_wed.c | 25 ++++++++++++-------------
 1 file changed, 12 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_wed.c b/drivers/net/ethernet/mediatek/mtk_wed.c
index 7d8842378c2b..dc898ded2f05 100644
--- a/drivers/net/ethernet/mediatek/mtk_wed.c
+++ b/drivers/net/ethernet/mediatek/mtk_wed.c
@@ -101,17 +101,21 @@ mtk_wdma_read_reset(struct mtk_wed_device *dev)
 	return wdma_r32(dev, MTK_WDMA_GLO_CFG);
 }
 
-static void
+static int
 mtk_wdma_rx_reset(struct mtk_wed_device *dev)
 {
 	u32 status, mask = MTK_WDMA_GLO_CFG_RX_DMA_BUSY;
-	int i;
+	int i, ret;
 
 	wdma_clr(dev, MTK_WDMA_GLO_CFG, MTK_WDMA_GLO_CFG_RX_DMA_EN);
-	if (readx_poll_timeout(mtk_wdma_read_reset, dev, status,
-			       !(status & mask), 0, 1000))
+	ret = readx_poll_timeout(mtk_wdma_read_reset, dev, status,
+				 !(status & mask), 0, 10000);
+	if (ret)
 		dev_err(dev->hw->dev, "rx reset failed\n");
 
+	wdma_w32(dev, MTK_WDMA_RESET_IDX, MTK_WDMA_RESET_IDX_RX);
+	wdma_w32(dev, MTK_WDMA_RESET_IDX, 0);
+
 	for (i = 0; i < ARRAY_SIZE(dev->rx_wdma); i++) {
 		if (dev->rx_wdma[i].desc)
 			continue;
@@ -119,6 +123,8 @@ mtk_wdma_rx_reset(struct mtk_wed_device *dev)
 		wdma_w32(dev,
 			 MTK_WDMA_RING_RX(i) + MTK_WED_RING_OFS_CPU_IDX, 0);
 	}
+
+	return ret;
 }
 
 static void
@@ -565,9 +571,7 @@ mtk_wed_detach(struct mtk_wed_device *dev)
 
 	mtk_wed_stop(dev);
 
-	wdma_w32(dev, MTK_WDMA_RESET_IDX, MTK_WDMA_RESET_IDX_RX);
-	wdma_w32(dev, MTK_WDMA_RESET_IDX, 0);
-
+	mtk_wdma_rx_reset(dev);
 	mtk_wed_reset(dev, MTK_WED_RESET_WED);
 	if (mtk_wed_get_rx_capa(dev)) {
 		wdma_clr(dev, MTK_WDMA_GLO_CFG, MTK_WDMA_GLO_CFG_TX_DMA_EN);
@@ -582,7 +586,6 @@ mtk_wed_detach(struct mtk_wed_device *dev)
 		mtk_wed_wo_reset(dev);
 		mtk_wed_free_rx_rings(dev);
 		mtk_wed_wo_deinit(hw);
-		mtk_wdma_rx_reset(dev);
 	}
 
 	if (dev->wlan.bus_type == MTK_WED_BUS_PCIE) {
@@ -999,11 +1002,7 @@ mtk_wed_reset_dma(struct mtk_wed_device *dev)
 		wed_w32(dev, MTK_WED_RESET_IDX, 0);
 	}
 
-	wdma_w32(dev, MTK_WDMA_RESET_IDX, MTK_WDMA_RESET_IDX_RX);
-	wdma_w32(dev, MTK_WDMA_RESET_IDX, 0);
-
-	if (mtk_wed_get_rx_capa(dev))
-		mtk_wdma_rx_reset(dev);
+	mtk_wdma_rx_reset(dev);
 
 	if (busy) {
 		mtk_wed_reset(dev, MTK_WED_RESET_WDMA_INT_AGENT);
-- 
2.38.1