gianfar: Fix a filer bug

We need to enable filer whenever we need to use multiple RX
queues. Also, need to program RIR0 register with the required
distribution we require, if using RX filer hashing support for
packet distribution to multiple queues.

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

2 files changed, 11 insertions, 1 deletions

diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index 6850dc0a7b91..1616531a71f7 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -357,8 +357,11 @@ static void gfar_init_mac(struct net_device *ndev)
         /* Configure the coalescing support */
         gfar_configure_coalescing(priv, 0xFF, 0xFF);
 
-        if (priv->rx_filer_enable)
+        if (priv->rx_filer_enable) {
                 rctrl |= RCTRL_FILREN;
+                /* Program the RIR0 reg with the required distribution */
+                gfar_write(&regs->rir0, DEFAULT_RIR0);
+        }
 
         if (priv->rx_csum_enable)
                 rctrl |= RCTRL_CHECKSUMMING;
@@ -1022,6 +1025,9 @@ static int gfar_probe(struct of_device *ofdev,
                 priv->rx_queue[i]->rxic = DEFAULT_RXIC;
         }
 
+        /* enable filer if using multiple RX queues*/
+        if(priv->num_rx_queues > 1)
+                priv->rx_filer_enable = 1;
         /* Enable most messages by default */
         priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
 
diff --git a/drivers/net/gianfar.h b/drivers/net/gianfar.h
index cbb451011cb5..68d16dc6e7c8 100644
--- a/drivers/net/gianfar.h
+++ b/drivers/net/gianfar.h
@@ -401,6 +401,10 @@ extern const char gfar_driver_version[];
 #define FPR_FILER_MASK  0xFFFFFFFF
 #define MAX_FILER_IDX   0xFF
 
+/* This default RIR value directly corresponds
+ * to the 3-bit hash value generated */
+#define DEFAULT_RIR0    0x05397700
+
 /* RQFCR register bits */
 #define RQFCR_GPI               0x80000000
 #define RQFCR_HASHTBL_Q         0x00000000