pch_gbe: correct receive time stamp filtering

This patch fixes the driver so that multicast PTP event messages can
be recognized by the hardware time stamping unit. The station address
register must be set according to the desired transport type.

[ RC - Rebased Takahiro's changes and wrote a commit message
  explaining the changes. ]

Signed-off-by: Takahiro Shimizu <tshimizu818@gmail.com>
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 13 insertions, 1 deletions

diff --git a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c
index 799a85aa12b3..53ac2fb78ab6 100644
--- a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c
+++ b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c
@@ -111,6 +111,9 @@ const char pch_driver_version[] = DRV_VERSION;
 /* 0x44 Time Synchronization Channel Event Register Bits */
 #define TX_SNAPSHOT_LOCKED (1<<0)
 #define RX_SNAPSHOT_LOCKED (1<<1)
+
+#define PTP_L4_MULTICAST_SA "01:00:5e:00:01:81"
+#define PTP_L2_MULTICAST_SA "01:1b:19:00:00:00"
 #endif
 
 static unsigned int copybreak __read_mostly = PCH_GBE_COPYBREAK_DEFAULT;
@@ -236,6 +239,7 @@ static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
         struct hwtstamp_config cfg;
         struct pch_gbe_adapter *adapter = netdev_priv(netdev);
         struct pci_dev *pdev;
+        u8 station[20];
 
         if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
                 return -EFAULT;
@@ -269,9 +273,17 @@ static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
                 adapter->hwts_rx_en = 1;
                 pch_ch_control_write(pdev, MASTER_MODE | CAP_MODE0);
                 break;
-        case HWTSTAMP_FILTER_PTP_V2_EVENT:
+        case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
+                adapter->hwts_rx_en = 1;
+                pch_ch_control_write(pdev, V2_MODE | CAP_MODE2);
+                strcpy(station, PTP_L4_MULTICAST_SA);
+                pch_set_station_address(station, pdev);
+                break;
+        case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
                 adapter->hwts_rx_en = 1;
                 pch_ch_control_write(pdev, V2_MODE | CAP_MODE2);
+                strcpy(station, PTP_L2_MULTICAST_SA);
+                pch_set_station_address(station, pdev);
                 break;
         default:
                 return -ERANGE;