gianfar: Add Multiple group Support

This patch introduces multiple group support for etsec2.0
devices.

Multiple group support is provided by mapping the set of enabled
queues to different groups and then programming the per group
regsiters imask, ievent, rstat, tstat.

The queues corresponding to a group are indicated by programming
isrg (interrupt steering) registers.

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

1 files changed, 31 insertions, 27 deletions

diff --git a/drivers/net/gianfar_ethtool.c b/drivers/net/gianfar_ethtool.c
index d3d26234f190..562f6c20f591 100644
--- a/drivers/net/gianfar_ethtool.c
+++ b/drivers/net/gianfar_ethtool.c
@@ -137,7 +137,7 @@ static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy,
 {
         int i;
         struct gfar_private *priv = netdev_priv(dev);
-        struct gfar __iomem *regs = priv->gfargrp.regs;
+        struct gfar __iomem *regs = priv->gfargrp[0].regs;
         u64 *extra = (u64 *) & priv->extra_stats;
 
         if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
@@ -226,7 +226,7 @@ static void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs, voi
 {
         int i;
         struct gfar_private *priv = netdev_priv(dev);
-        u32 __iomem *theregs = (u32 __iomem *) priv->gfargrp.regs;
+        u32 __iomem *theregs = (u32 __iomem *) priv->gfargrp[0].regs;
         u32 *buf = (u32 *) regbuf;
 
         for (i = 0; i < sizeof (struct gfar) / sizeof (u32); i++)
@@ -352,22 +352,23 @@ static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals
 static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
 {
         struct gfar_private *priv = netdev_priv(dev);
-        struct gfar __iomem *regs = priv->gfargrp.regs;
-        struct gfar_priv_tx_q *tx_queue = NULL;
-        struct gfar_priv_rx_q *rx_queue = NULL;
+        int i = 0;
 
         if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
                 return -EOPNOTSUPP;
 
-        tx_queue = priv->tx_queue[0];
-        rx_queue = priv->rx_queue[0];
-
         /* Set up rx coalescing */
+        /* As of now, we will enable/disable coalescing for all
+         * queues together in case of eTSEC2, this will be modified
+         * along with the ethtool interface */
         if ((cvals->rx_coalesce_usecs == 0) ||
-            (cvals->rx_max_coalesced_frames == 0))
-                rx_queue->rxcoalescing = 0;
-        else
-                rx_queue->rxcoalescing = 1;
+            (cvals->rx_max_coalesced_frames == 0)) {
+                for (i = 0; i < priv->num_rx_queues; i++)
+                        priv->rx_queue[i]->rxcoalescing = 0;
+        } else {
+                for (i = 0; i < priv->num_rx_queues; i++)
+                        priv->rx_queue[i]->rxcoalescing = 1;
+        }
 
         if (NULL == priv->phydev)
                 return -ENODEV;
@@ -385,15 +386,21 @@ static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals
                 return -EINVAL;
         }
 
-        rx_queue->rxic = mk_ic_value(cvals->rx_max_coalesced_frames,
-                gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs));
+        for (i = 0; i < priv->num_rx_queues; i++) {
+                priv->rx_queue[i]->rxic = mk_ic_value(
+                        cvals->rx_max_coalesced_frames,
+                        gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs));
+        }
 
         /* Set up tx coalescing */
         if ((cvals->tx_coalesce_usecs == 0) ||
-            (cvals->tx_max_coalesced_frames == 0))
-                tx_queue->txcoalescing = 0;
-        else
-                tx_queue->txcoalescing = 1;
+            (cvals->tx_max_coalesced_frames == 0)) {
+                for (i = 0; i < priv->num_tx_queues; i++)
+                        priv->tx_queue[i]->txcoalescing = 0;
+        } else {
+                for (i = 0; i < priv->num_tx_queues; i++)
+                        priv->tx_queue[i]->txcoalescing = 1;
+        }
 
         /* Check the bounds of the values */
         if (cvals->tx_coalesce_usecs > GFAR_MAX_COAL_USECS) {
@@ -408,16 +415,13 @@ static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals
                 return -EINVAL;
         }
 
-        tx_queue->txic = mk_ic_value(cvals->tx_max_coalesced_frames,
-                gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs));
-
-        gfar_write(&regs->rxic, 0);
-        if (rx_queue->rxcoalescing)
-                gfar_write(&regs->rxic, rx_queue->rxic);
+        for (i = 0; i < priv->num_tx_queues; i++) {
+                priv->tx_queue[i]->txic = mk_ic_value(
+                        cvals->tx_max_coalesced_frames,
+                        gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs));
+        }
 
-        gfar_write(&regs->txic, 0);
-        if (tx_queue->txcoalescing)
-                gfar_write(&regs->txic, tx_queue->txic);
+        gfar_configure_coalescing(priv, 0xFF, 0xFF);
 
         return 0;
 }