commit fba4ed030cfae7efdb6b79a57b0c5a9d72c9de83
author Sandeep Gopalpet <Sandeep.Kumar@freescale.com> Mon Nov 02 07:03:15 2009 +0000
committer David S. Miller <davem@davemloft.net> Mon Nov 02 23:40:57 2009 -0800
tree ddee54010c64517a01ea112ca16e5bc1fee0938c
parent f4983704a63b3764418905a77d48105a8cbce97f

gianfar: Add Multiple Queue Support

This patch introduces multiple Tx and Rx queues.
The incoming packets can be classified into different queues
based on filer rules (out of scope of this patch). The number
of queues enabled will be based on a DTS entries fsl,num_tx_queues
and fsl,num_rx_queues.

Although we are enabling multiple queues, the interrupt coalescing
is on per device level (etsec-1.7 doesn't support multiple rxics
and txics).

Signed-off-by: Sandeep Gopalpet <Sandeep.Kumar@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/gianfar_sysfs.c

diff --git a/drivers/net/gianfar_sysfs.c b/drivers/net/gianfar_sysfs.c
index adea11e..4b726f6 100644
--- a/drivers/net/gianfar_sysfs.c
+++ b/drivers/net/gianfar_sysfs.c
@@ -51,7 +51,6 @@
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 	struct gfar __iomem *regs = priv->gfargrp.regs;
-	struct gfar_priv_rx_q *rx_queue = NULL;
 	int new_setting = 0;
 	u32 temp;
 	unsigned long flags;
@@ -59,7 +58,6 @@
 	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BD_STASHING))
 		return count;
 
-	rx_queue = priv->rx_queue;
 
 	/* Find out the new setting */
 	if (!strncmp("on", buf, count - 1) || !strncmp("1", buf, count - 1))
@@ -70,7 +68,9 @@
 	else
 		return count;
 
-	spin_lock_irqsave(&rx_queue->rxlock, flags);
+
+	local_irq_save(flags);
+	lock_rx_qs(priv);
 
 	/* Set the new stashing value */
 	priv->bd_stash_en = new_setting;
@@ -84,7 +84,8 @@
 
 	gfar_write(&regs->attr, temp);
 
-	spin_unlock_irqrestore(&rx_queue->rxlock, flags);
+	unlock_rx_qs(priv);
+	local_irq_restore(flags);
 
 	return count;
 }
@@ -105,7 +106,6 @@
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 	struct gfar __iomem *regs = priv->gfargrp.regs;
-	struct gfar_priv_rx_q *rx_queue = NULL;
 	unsigned int length = simple_strtoul(buf, NULL, 0);
 	u32 temp;
 	unsigned long flags;
@@ -113,9 +113,9 @@
 	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BUF_STASHING))
 		return count;
 
-	rx_queue = priv->rx_queue;
+	local_irq_save(flags);
+	lock_rx_qs(priv);
 
-	spin_lock_irqsave(&rx_queue->rxlock, flags);
 	if (length > priv->rx_buffer_size)
 		goto out;
 
@@ -140,7 +140,8 @@
 	gfar_write(&regs->attr, temp);
 
 out:
-	spin_unlock_irqrestore(&rx_queue->rxlock, flags);
+	unlock_rx_qs(priv);
+	local_irq_restore(flags);
 
 	return count;
 }
@@ -164,7 +165,6 @@
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 	struct gfar __iomem *regs = priv->gfargrp.regs;
-	struct gfar_priv_rx_q *rx_queue = NULL;
 	unsigned short index = simple_strtoul(buf, NULL, 0);
 	u32 temp;
 	unsigned long flags;
@@ -172,9 +172,9 @@
 	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BUF_STASHING))
 		return count;
 
-	rx_queue = priv->rx_queue;
+	local_irq_save(flags);
+	lock_rx_qs(priv);
 
-	spin_lock_irqsave(&rx_queue->rxlock, flags);
 	if (index > priv->rx_stash_size)
 		goto out;
 
@@ -189,7 +189,8 @@
 	gfar_write(&regs->attreli, flags);
 
 out:
-	spin_unlock_irqrestore(&rx_queue->rxlock, flags);
+	unlock_rx_qs(priv);
+	local_irq_restore(flags);
 
 	return count;
 }
@@ -212,7 +213,6 @@
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 	struct gfar __iomem *regs = priv->gfargrp.regs;
-	struct gfar_priv_tx_q *tx_queue = NULL;
 	unsigned int length = simple_strtoul(buf, NULL, 0);
 	u32 temp;
 	unsigned long flags;
@@ -220,9 +220,8 @@
 	if (length > GFAR_MAX_FIFO_THRESHOLD)
 		return count;
 
-	tx_queue = priv->tx_queue;
-
-	spin_lock_irqsave(&tx_queue->txlock, flags);
+	local_irq_save(flags);
+	lock_tx_qs(priv);
 
 	priv->fifo_threshold = length;
 
@@ -231,7 +230,8 @@
 	temp |= length;
 	gfar_write(&regs->fifo_tx_thr, temp);
 
-	spin_unlock_irqrestore(&tx_queue->txlock, flags);
+	unlock_tx_qs(priv);
+	local_irq_restore(flags);
 
 	return count;
 }
@@ -253,7 +253,6 @@
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 	struct gfar __iomem *regs = priv->gfargrp.regs;
-	struct gfar_priv_tx_q *tx_queue = NULL;
 	unsigned int num = simple_strtoul(buf, NULL, 0);
 	u32 temp;
 	unsigned long flags;
@@ -261,8 +260,8 @@
 	if (num > GFAR_MAX_FIFO_STARVE)
 		return count;
 
-	tx_queue = priv->tx_queue;
-	spin_lock_irqsave(&tx_queue->txlock, flags);
+	local_irq_save(flags);
+	lock_tx_qs(priv);
 
 	priv->fifo_starve = num;
 
@@ -271,7 +270,8 @@
 	temp |= num;
 	gfar_write(&regs->fifo_tx_starve, temp);
 
-	spin_unlock_irqrestore(&tx_queue->txlock, flags);
+	unlock_tx_qs(priv);
+	local_irq_restore(flags);
 
 	return count;
 }
@@ -294,7 +294,6 @@
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 	struct gfar __iomem *regs = priv->gfargrp.regs;
-	struct gfar_priv_tx_q *tx_queue = NULL;
 	unsigned int num = simple_strtoul(buf, NULL, 0);
 	u32 temp;
 	unsigned long flags;
@@ -302,8 +301,8 @@
 	if (num > GFAR_MAX_FIFO_STARVE_OFF)
 		return count;
 
-	tx_queue = priv->tx_queue;
-	spin_lock_irqsave(&tx_queue->txlock, flags);
+	local_irq_save(flags);
+	lock_tx_qs(priv);
 
 	priv->fifo_starve_off = num;
 
@@ -312,7 +311,8 @@
 	temp |= num;
 	gfar_write(&regs->fifo_tx_starve_shutoff, temp);
 
-	spin_unlock_irqrestore(&tx_queue->txlock, flags);
+	unlock_tx_qs(priv);
+	local_irq_restore(flags);
 
 	return count;
 }