net: enetc: include MAC Merge / FP registers in register dump

These have been useful in debugging various problems related to frame
preemption, so make them available through ethtool --register-dump for
later too.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c b/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
index 838a921..e993ed0 100644 (file)
--- a/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
@@ -32,6 +32,12 @@ static const u32 enetc_port_regs[] = {
        ENETC_PM0_CMD_CFG, ENETC_PM0_MAXFRM, ENETC_PM0_IF_MODE
 };
 
+static const u32 enetc_port_mm_regs[] = {
+       ENETC_MMCSR, ENETC_PFPMR, ENETC_PTCFPR(0), ENETC_PTCFPR(1),
+       ENETC_PTCFPR(2), ENETC_PTCFPR(3), ENETC_PTCFPR(4), ENETC_PTCFPR(5),
+       ENETC_PTCFPR(6), ENETC_PTCFPR(7),
+};
+
 static int enetc_get_reglen(struct net_device *ndev)
 {
        struct enetc_ndev_priv *priv = netdev_priv(ndev);
@@ -45,6 +51,9 @@ static int enetc_get_reglen(struct net_device *ndev)
        if (hw->port)
                len += ARRAY_SIZE(enetc_port_regs);
 
+       if (hw->port && !!(priv->si->hw_features & ENETC_SI_F_QBU))
+               len += ARRAY_SIZE(enetc_port_mm_regs);
+
        len *= sizeof(u32) * 2; /* store 2 entries per reg: addr and value */
 
        return len;
@@ -90,6 +99,14 @@ static void enetc_get_regs(struct net_device *ndev, struct ethtool_regs *regs,
                *buf++ = addr;
                *buf++ = enetc_rd(hw, addr);
        }
+
+       if (priv->si->hw_features & ENETC_SI_F_QBU) {
+               for (i = 0; i < ARRAY_SIZE(enetc_port_mm_regs); i++) {
+                       addr = ENETC_PORT_BASE + enetc_port_mm_regs[i];
+                       *buf++ = addr;
+                       *buf++ = enetc_rd(hw, addr);
+               }
+       }
 }
 
 static const struct {