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From f84a8ad5cc385fe414758fa4d423e26197a79c28 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Sat, 23 Apr 2016 11:57:21 +0200
Subject: [PATCH 79/91] net-next: fix BQL support
Signed-off-by: John Crispin <blogic@openwrt.org>
---
drivers/net/ethernet/mediatek/mtk_eth_soc.c | 33 +++++++++++++++------------
1 file changed, 19 insertions(+), 14 deletions(-)
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index bab5d45..ded09bc 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -625,7 +625,15 @@ static int mtk_tx_map(struct sk_buff *skb, struct net_device *dev,
WRITE_ONCE(itxd->txd3, (TX_DMA_SWC | TX_DMA_PLEN0(skb_headlen(skb)) |
(!nr_frags * TX_DMA_LS0)));
- netdev_sent_queue(dev, skb->len);
+ /* we have a single DMA ring so BQL needs to be updated for all devices
+ * sitting on this ring
+ */
+ for (i = 0; i < MTK_MAC_COUNT; i++) {
+ if (!eth->netdev[i])
+ continue;
+ netdev_sent_queue(dev, skb->len);
+ }
+
skb_tx_timestamp(skb);
ring->next_free = mtk_qdma_phys_to_virt(ring, txd->txd2);
@@ -853,21 +861,18 @@ static int mtk_poll_tx(struct mtk_eth *eth, int budget, bool *tx_again)
struct mtk_tx_dma *desc;
struct sk_buff *skb;
struct mtk_tx_buf *tx_buf;
- int total = 0, done[MTK_MAX_DEVS];
- unsigned int bytes[MTK_MAX_DEVS];
+ int total = 0, done = 0;
+ unsigned int bytes = 0;
u32 cpu, dma;
static int condition;
int i;
- memset(done, 0, sizeof(done));
- memset(bytes, 0, sizeof(bytes));
-
cpu = mtk_r32(eth, MTK_QTX_CRX_PTR);
dma = mtk_r32(eth, MTK_QTX_DRX_PTR);
desc = mtk_qdma_phys_to_virt(ring, cpu);
- while ((cpu != dma) && budget) {
+ while ((cpu != dma) && done < budget) {
u32 next_cpu = desc->txd2;
int mac;
@@ -887,9 +892,8 @@ static int mtk_poll_tx(struct mtk_eth *eth, int budget, bool *tx_again)
}
if (skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC) {
- bytes[mac] += skb->len;
- done[mac]++;
- budget--;
+ bytes += skb->len;
+ done++;
}
mtk_tx_unmap(eth->dev, tx_buf);
@@ -902,13 +906,14 @@ static int mtk_poll_tx(struct mtk_eth *eth, int budget, bool *tx_again)
mtk_w32(eth, cpu, MTK_QTX_CRX_PTR);
+ /* we have a single DMA ring so BQL needs to be updated for all devices
+ * sitting on this ring
+ */
for (i = 0; i < MTK_MAC_COUNT; i++) {
- if (!eth->netdev[i] || !done[i])
+ if (!eth->netdev[i])
continue;
- netdev_completed_queue(eth->netdev[i], done[i], bytes[i]);
- total += done[i];
+ netdev_completed_queue(eth->netdev[i], done, bytes);
}
-
/* read hw index again make sure no new tx packet */
if (cpu != dma || cpu != mtk_r32(eth, MTK_QTX_DRX_PTR))
*tx_again = true;
--
1.7.10.4
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