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

4 files changed, 106 insertions, 10 deletions

diff --git a/target/linux/brcm47xx/patches-3.10/730-b44-add-support-for-Byte-Queue-Limits.patch b/target/linux/brcm47xx/patches-3.10/730-b44-add-support-for-Byte-Queue-Limits.patch
new file mode 100644
index 0000000000..5da6abe202
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.10/730-b44-add-support-for-Byte-Queue-Limits.patch
@@ -0,0 +1,46 @@
+From: Hauke Mehrtens <hauke@hauke-m.de>
+b44: add support for Byte Queue Limits
+
+--- a/drivers/net/ethernet/broadcom/b44.c
++++ b/drivers/net/ethernet/broadcom/b44.c
+@@ -622,6 +622,7 @@ static void b44_timer(unsigned long __op
+ static void b44_tx(struct b44 *bp)
+ {
+ 	u32 cur, cons;
++	unsigned bytes_compl = 0, pkts_compl = 0;
+ 
+ 	cur  = br32(bp, B44_DMATX_STAT) & DMATX_STAT_CDMASK;
+ 	cur /= sizeof(struct dma_desc);
+@@ -638,9 +639,14 @@ static void b44_tx(struct b44 *bp)
+ 				 skb->len,
+ 				 DMA_TO_DEVICE);
+ 		rp->skb = NULL;
++
++		bytes_compl += skb->len;
++		pkts_compl++;
++
+ 		dev_kfree_skb_irq(skb);
+ 	}
+ 
++	netdev_completed_queue(bp->dev, pkts_compl, bytes_compl);
+ 	bp->tx_cons = cons;
+ 	if (netif_queue_stopped(bp->dev) &&
+ 	    TX_BUFFS_AVAIL(bp) > B44_TX_WAKEUP_THRESH)
+@@ -1044,6 +1050,8 @@ static netdev_tx_t b44_start_xmit(struct
+ 	if (bp->flags & B44_FLAG_REORDER_BUG)
+ 		br32(bp, B44_DMATX_PTR);
+ 
++	netdev_sent_queue(dev, skb->len);
++
+ 	if (TX_BUFFS_AVAIL(bp) < 1)
+ 		netif_stop_queue(dev);
+ 
+@@ -1442,6 +1450,8 @@ static void b44_init_hw(struct b44 *bp,
+ 
+ 	val = br32(bp, B44_ENET_CTRL);
+ 	bw32(bp, B44_ENET_CTRL, (val | ENET_CTRL_ENABLE));
++	
++	netdev_reset_queue(bp->dev);
+ }
+ 
+ static int b44_open(struct net_device *dev)
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);
diff --git a/target/linux/brcm47xx/patches-3.10/770-bgmac-phylib.patch b/target/linux/brcm47xx/patches-3.10/770-bgmac-phylib.patch
index 33308319db..4a42aeba77 100644
--- a/target/linux/brcm47xx/patches-3.10/770-bgmac-phylib.patch
+++ b/target/linux/brcm47xx/patches-3.10/770-bgmac-phylib.patch
@@ -10,7 +10,7 @@
  	  They can be found on BCM47xx SoCs and provide gigabit ethernet.
 --- a/drivers/net/ethernet/broadcom/bgmac.c
 +++ b/drivers/net/ethernet/broadcom/bgmac.c
-@@ -1219,27 +1219,14 @@ static int bgmac_set_mac_address(struct
+@@ -1229,27 +1229,14 @@ static int bgmac_set_mac_address(struct
  static int bgmac_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
  {
  	struct bgmac *bgmac = netdev_priv(net_dev);
@@ -45,7 +45,7 @@
  }
  
  static const struct net_device_ops bgmac_netdev_ops = {
-@@ -1261,61 +1248,18 @@ static int bgmac_get_settings(struct net
+@@ -1271,61 +1258,18 @@ static int bgmac_get_settings(struct net
  {
  	struct bgmac *bgmac = netdev_priv(net_dev);
  
@@ -111,7 +111,7 @@
  
  static void bgmac_get_drvinfo(struct net_device *net_dev,
  			      struct ethtool_drvinfo *info)
-@@ -1326,6 +1270,7 @@ static void bgmac_get_drvinfo(struct net
+@@ -1336,6 +1280,7 @@ static void bgmac_get_drvinfo(struct net
  
  static const struct ethtool_ops bgmac_ethtool_ops = {
  	.get_settings		= bgmac_get_settings,
@@ -119,7 +119,7 @@
  	.get_drvinfo		= bgmac_get_drvinfo,
  };
  
-@@ -1344,10 +1289,42 @@ static int bgmac_mii_write(struct mii_bu
+@@ -1354,10 +1299,42 @@ static int bgmac_mii_write(struct mii_bu
  	return bgmac_phy_write(bus->priv, mii_id, regnum, value);
  }
  
@@ -162,7 +162,7 @@
  
  	mii_bus = mdiobus_alloc();
  	if (!mii_bus)
-@@ -1378,7 +1355,29 @@ static int bgmac_mii_register(struct bgm
+@@ -1388,7 +1365,29 @@ static int bgmac_mii_register(struct bgm
  
  	bgmac->mii_bus = mii_bus;
  
diff --git a/target/linux/brcm47xx/patches-3.10/780-b44-phylib.patch b/target/linux/brcm47xx/patches-3.10/780-b44-phylib.patch
index 72b374ce55..244978b3f2 100644
--- a/target/linux/brcm47xx/patches-3.10/780-b44-phylib.patch
+++ b/target/linux/brcm47xx/patches-3.10/780-b44-phylib.patch
@@ -47,7 +47,7 @@
  }
  
  static int b44_phy_reset(struct b44 *bp)
-@@ -1821,102 +1824,24 @@ static int b44_get_settings(struct net_d
+@@ -1831,102 +1834,24 @@ static int b44_get_settings(struct net_d
  {
  	struct b44 *bp = netdev_priv(dev);
  
@@ -155,7 +155,7 @@
  }
  
  static void b44_get_ringparam(struct net_device *dev,
-@@ -2092,20 +2017,81 @@ static const struct ethtool_ops b44_etht
+@@ -2102,20 +2027,81 @@ static const struct ethtool_ops b44_etht
  
  static int b44_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
  {
@@ -239,7 +239,7 @@
  static int b44_get_invariants(struct b44 *bp)
  {
  	struct ssb_device *sdev = bp->sdev;
-@@ -2225,12 +2211,38 @@ static int b44_init_one(struct ssb_devic
+@@ -2235,12 +2221,38 @@ static int b44_init_one(struct ssb_devic
  		goto err_out_powerdown;
  	}
  
@@ -284,7 +284,7 @@
  
  	/* By default, advertise all speed/duplex settings. */
  	bp->flags |= (B44_FLAG_ADV_10HALF | B44_FLAG_ADV_10FULL |
-@@ -2262,6 +2274,16 @@ static int b44_init_one(struct ssb_devic
+@@ -2272,6 +2284,16 @@ static int b44_init_one(struct ssb_devic
  
  	return 0;
  
@@ -301,7 +301,7 @@
  err_out_powerdown:
  	ssb_bus_may_powerdown(sdev->bus);
  
-@@ -2275,8 +2297,12 @@ out:
+@@ -2285,8 +2307,12 @@ out:
  static void b44_remove_one(struct ssb_device *sdev)
  {
  	struct net_device *dev = ssb_get_drvdata(sdev);