mediatek: update to latest kernel patchset from v4.13-rc

Signed-off-by: Muciri Gatimu <muciri@openmesh.com>
Signed-off-by: Shashidhar Lakkavalli <shashidhar.lakkavalli@openmesh.com>
Signed-off-by: John Crispin <john@phrozen.org>

1 files changed, 93 insertions, 0 deletions

diff --git a/target/linux/mediatek/patches-4.9/0027-net-next-mediatek-fix-DQL-support.patch b/target/linux/mediatek/patches-4.9/0027-net-next-mediatek-fix-DQL-support.patch
new file mode 100644
index 0000000000..d21c8eedb1
--- /dev/null
+++ b/target/linux/mediatek/patches-4.9/0027-net-next-mediatek-fix-DQL-support.patch
@@ -0,0 +1,93 @@
+From f974e397b806f7b16d11cc1542538616291924f1 Mon Sep 17 00:00:00 2001
+From: John Crispin <john@phrozen.org>
+Date: Sat, 23 Apr 2016 11:57:21 +0200
+Subject: [PATCH 27/57] net-next: mediatek: fix DQL support
+
+The MTK ethernet core has 2 MACs both sitting on the same DMA ring. The
+current code will assign the TX traffic of each MAC to its own DQL. This
+results in the amount of data, that DQL says is in the queue incorrect. As
+the data from multiple devices is infact enqueued. This makes any decision
+based on these value non deterministic. Fix this by tracking all TX
+traffic, regardless of the MAC it belongs to in the DQL of all devices
+using the DMA.
+
+Signed-off-by: John Crispin <john@phrozen.org>
+---
+ drivers/net/ethernet/mediatek/mtk_eth_soc.c | 35 +++++++++++++++++------------
+ 1 file changed, 21 insertions(+), 14 deletions(-)
+
+--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+@@ -710,7 +710,16 @@ static int mtk_tx_map(struct sk_buff *sk
+ 	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(eth->netdev[i], skb->len);
++	}
++
+ 	skb_tx_timestamp(skb);
+ 
+ 	ring->next_free = mtk_qdma_phys_to_virt(ring, txd->txd2);
+@@ -1002,21 +1011,18 @@ static int mtk_poll_tx(struct mtk_eth *e
+ 	struct mtk_tx_dma *desc;
+ 	struct sk_buff *skb;
+ 	struct mtk_tx_buf *tx_buf;
+-	unsigned int 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 total = 0, i;
+-
+-	memset(done, 0, sizeof(done));
+-	memset(bytes, 0, sizeof(bytes));
++	int i;
+ 
+ 	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 = 0;
+ 
+@@ -1035,9 +1041,8 @@ static int mtk_poll_tx(struct mtk_eth *e
+ 		}
+ 
+ 		if (skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC) {
+-			bytes[mac] += skb->len;
+-			done[mac]++;
+-			budget--;
++			bytes += skb->len;
++			done++;
+ 		}
+ 		mtk_tx_unmap(eth, tx_buf);
+ 
+@@ -1049,11 +1054,13 @@ static int mtk_poll_tx(struct mtk_eth *e
+ 
+ 	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);
+ 	}
+ 
+ 	if (mtk_queue_stopped(eth) &&