brcm47xx: bgmac: b44: add support for Byte Queue Limits

This adds support for Byte Queue Limits in bgmac and b44, now it is 
possible to use more advanced network queue control algorithms.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38038 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 50 insertions, 0 deletions

diff --git a/target/linux/brcm47xx/patches-3.10/740-bgmac-add-support-for-Byte-Queue-Limits.patch b/target/linux/brcm47xx/patches-3.10/740-bgmac-add-support-for-Byte-Queue-Limits.patch
new file mode 100644
index 0000000000..68d1bc9f6b
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.10/740-bgmac-add-support-for-Byte-Queue-Limits.patch
@@ -0,0 +1,50 @@
+From: Hauke Mehrtens <hauke@hauke-m.de>
+bgmac: add support for Byte Queue Limits
+
+--- a/drivers/net/ethernet/broadcom/bgmac.c
++++ b/drivers/net/ethernet/broadcom/bgmac.c
+@@ -178,6 +178,7 @@ static void bgmac_dma_tx_free(struct bgm
+ 	struct device *dma_dev = bgmac->core->dma_dev;
+ 	int empty_slot;
+ 	bool freed = false;
++	unsigned bytes_compl = 0, pkts_compl = 0;
+ 
+ 	/* The last slot that hardware didn't consume yet */
+ 	empty_slot = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS);
+@@ -195,6 +196,9 @@ static void bgmac_dma_tx_free(struct bgm
+ 					 slot->skb->len, DMA_TO_DEVICE);
+ 			slot->dma_addr = 0;
+ 
++			bytes_compl += slot->skb->len;
++			pkts_compl++;
++
+ 			/* Free memory! :) */
+ 			dev_kfree_skb(slot->skb);
+ 			slot->skb = NULL;
+@@ -208,6 +212,8 @@ static void bgmac_dma_tx_free(struct bgm
+ 		freed = true;
+ 	}
+ 
++	netdev_completed_queue(bgmac->net_dev, pkts_compl, bytes_compl);
++
+ 	if (freed && netif_queue_stopped(bgmac->net_dev))
+ 		netif_wake_queue(bgmac->net_dev);
+ }
+@@ -987,6 +993,8 @@ static void bgmac_chip_reset(struct bgma
+ 		bgmac_set(bgmac, BGMAC_PHY_CNTL, BGMAC_PC_MTE);
+ 	bgmac_miiconfig(bgmac);
+ 	bgmac_phy_init(bgmac);
++	
++	netdev_reset_queue(bgmac->net_dev);
+ 
+ 	bgmac->int_status = 0;
+ }
+@@ -1198,6 +1206,8 @@ static netdev_tx_t bgmac_start_xmit(stru
+ 	struct bgmac *bgmac = netdev_priv(net_dev);
+ 	struct bgmac_dma_ring *ring;
+ 
++	netdev_sent_queue(net_dev, skb->len);
++
+ 	/* No QOS support yet */
+ 	ring = &bgmac->tx_ring[0];
+ 	return bgmac_dma_tx_add(bgmac, ring, skb);