[PATCH net-next V2 05/16] net: fec: split off napi routine with 3 queues

[Troy Kisky]

If we only have 1 tx/rx queue, we need not check
the other queues.

Signed-off-by: Troy Kisky <troy.ki...@boundarydevices.com>
---
 drivers/net/ethernet/freescale/fec_main.c | 39 +++++++++++++++++++++++++++++--
 1 file changed, 37 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fec_main.c 
b/drivers/net/ethernet/freescale/fec_main.c
index 4a218b9..610cf6c 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -1521,7 +1521,7 @@ fec_enet_interrupt(int irq, void *dev_id)
        return IRQ_HANDLED;
 }
 
-static int fec_enet_rx_napi(struct napi_struct *napi, int budget)
+static int fec_enet_napi_q3(struct napi_struct *napi, int budget)
 {
        struct net_device *ndev = napi->dev;
        struct fec_enet_private *fep = netdev_priv(ndev);
@@ -1564,6 +1564,39 @@ static int fec_enet_rx_napi(struct napi_struct *napi, 
int budget)
        return pkts;
 }
 
+static int fec_enet_napi_q1(struct napi_struct *napi, int budget)
+{
+       struct net_device *ndev = napi->dev;
+       struct fec_enet_private *fep = netdev_priv(ndev);
+       int pkts = 0;
+       uint events;
+
+       do {
+               events = readl(fep->hwp + FEC_IEVENT);
+               if (fep->events) {
+                       events |= fep->events;
+                       fep->events = 0;
+               }
+               events &= FEC_ENET_RXF_0 | FEC_ENET_TXF_0;
+               if (!events) {
+                       if (budget) {
+                               napi_complete(napi);
+                               writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK);
+                       }
+                       return pkts;
+               }
+
+               writel(events, fep->hwp + FEC_IEVENT);
+               if (events & FEC_ENET_RXF_0)
+                       pkts += fec_rxq(ndev, fep, fep->rx_queue[0],
+                                       budget - pkts);
+               if (events & FEC_ENET_TXF_0)
+                       fec_txq(ndev, fep, fep->tx_queue[0]);
+       } while (pkts < budget);
+       fep->events |= FEC_ENET_RXF_0;  /* save for next callback */
+       return pkts;
+}
+
 /* ------------------------------------------------------------------------- */
 static void fec_get_mac(struct net_device *ndev)
 {
@@ -3123,7 +3156,9 @@ static int fec_enet_init(struct net_device *ndev)
        ndev->ethtool_ops = &fec_enet_ethtool_ops;
 
        writel(FEC_RX_DISABLED_IMASK, fep->hwp + FEC_IMASK);
-       netif_napi_add(ndev, &fep->napi, fec_enet_rx_napi, NAPI_POLL_WEIGHT);
+       netif_napi_add(ndev, &fep->napi, (fep->num_rx_queues |
+                      fep->num_tx_queues) == 1 ? fec_enet_napi_q1 :
+                      fec_enet_napi_q3, NAPI_POLL_WEIGHT);
 
        if (fep->quirks & FEC_QUIRK_HAS_VLAN)
                /* enable hw VLAN support */
-- 
2.5.0