[PATCH] r8169: add ethtool support for dumping the chip statistics

There aren't lots of statistics available, but this is what is available
according to the RealTek documentation.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>

1 files changed, 100 insertions, 0 deletions

diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index d795b31649f3..b30e13867e1e 100644
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -201,6 +201,8 @@ static struct {
 enum RTL8169_registers {
         MAC0 = 0,               /* Ethernet hardware address. */
         MAR0 = 8,               /* Multicast filter. */
+        CounterAddrLow = 0x10,
+        CounterAddrHigh = 0x14,
         TxDescStartAddrLow = 0x20,
         TxDescStartAddrHigh = 0x24,
         TxHDescStartAddrLow = 0x28,
@@ -342,6 +344,9 @@ enum RTL8169_register_content {
 
         /* _TBICSRBit */
         TBILinkOK = 0x02000000,
+
+        /* DumpCounterCommand */
+        CounterDump = 0x8,
 };
 
 enum _DescStatusBit {
@@ -910,6 +915,98 @@ static void rtl8169_set_msglevel(struct net_device *dev, u32 value)
         tp->msg_enable = value;
 }
 
+static const char rtl8169_gstrings[][ETH_GSTRING_LEN] = {
+        "tx_packets",
+        "rx_packets",
+        "tx_errors",
+        "rx_errors",
+        "rx_missed",
+        "align_errors",
+        "tx_single_collisions",
+        "tx_multi_collisions",
+        "unicast",
+        "broadcast",
+        "multicast",
+        "tx_aborted",
+        "tx_underrun",
+};
+
+struct rtl8169_counters {
+        u64     tx_packets;
+        u64     rx_packets;
+        u64     tx_errors;
+        u32     rx_errors;
+        u16     rx_missed;
+        u16     align_errors;
+        u32     tx_one_collision;
+        u32     tx_multi_collision;
+        u64     rx_unicast;
+        u64     rx_broadcast;
+        u32     rx_multicast;
+        u16     tx_aborted;
+        u16     tx_underun;
+};
+
+static int rtl8169_get_stats_count(struct net_device *dev)
+{
+        return ARRAY_SIZE(rtl8169_gstrings);
+}
+
+static void rtl8169_get_ethtool_stats(struct net_device *dev,
+                                      struct ethtool_stats *stats, u64 *data)
+{
+        struct rtl8169_private *tp = netdev_priv(dev);
+        void __iomem *ioaddr = tp->mmio_addr;
+        struct rtl8169_counters *counters;
+        dma_addr_t paddr;
+        u32 cmd;
+
+        ASSERT_RTNL();
+
+        counters = pci_alloc_consistent(tp->pci_dev, sizeof(*counters), &paddr);
+        if (!counters)
+                return;
+
+        RTL_W32(CounterAddrHigh, (u64)paddr >> 32);
+        cmd = (u64)paddr & DMA_32BIT_MASK;
+        RTL_W32(CounterAddrLow, cmd);
+        RTL_W32(CounterAddrLow, cmd | CounterDump);
+
+        while (RTL_R32(CounterAddrLow) & CounterDump) {
+                if (msleep_interruptible(1))
+                        break;
+        }
+
+        RTL_W32(CounterAddrLow, 0);
+        RTL_W32(CounterAddrHigh, 0);
+
+        data[0] = le64_to_cpu(counters->tx_packets);
+        data[1] = le64_to_cpu(counters->rx_packets);
+        data[2] = le64_to_cpu(counters->tx_errors);
+        data[3] = le32_to_cpu(counters->rx_errors);
+        data[4] = le16_to_cpu(counters->rx_missed);
+        data[5] = le16_to_cpu(counters->align_errors);
+        data[6] = le32_to_cpu(counters->tx_one_collision);
+        data[7] = le32_to_cpu(counters->tx_multi_collision);
+        data[8] = le64_to_cpu(counters->rx_unicast);
+        data[9] = le64_to_cpu(counters->rx_broadcast);
+        data[10] = le32_to_cpu(counters->rx_multicast);
+        data[11] = le16_to_cpu(counters->tx_aborted);
+        data[12] = le16_to_cpu(counters->tx_underun);
+
+        pci_free_consistent(tp->pci_dev, sizeof(*counters), counters, paddr);
+}
+
+static void rtl8169_get_strings(struct net_device *dev, u32 stringset, u8 *data)
+{
+        switch(stringset) {
+        case ETH_SS_STATS:
+                memcpy(data, *rtl8169_gstrings, sizeof(rtl8169_gstrings));
+                break;
+        }
+}
+
+
 static struct ethtool_ops rtl8169_ethtool_ops = {
         .get_drvinfo            = rtl8169_get_drvinfo,
         .get_regs_len           = rtl8169_get_regs_len,
@@ -927,6 +1024,9 @@ static struct ethtool_ops rtl8169_ethtool_ops = {
         .get_tso                = ethtool_op_get_tso,
         .set_tso                = ethtool_op_set_tso,
         .get_regs               = rtl8169_get_regs,
+        .get_strings            = rtl8169_get_strings,
+        .get_stats_count        = rtl8169_get_stats_count,
+        .get_ethtool_stats      = rtl8169_get_ethtool_stats,
 };
 
 static void rtl8169_write_gmii_reg_bit(void __iomem *ioaddr, int reg, int bitnum,