Merge branch 'r8169-phy-func-ptr-arrays'

Heiner Kallweit says:

====================
r8169: create function pointer arrays for PHY and chip hw init functions

Using function pointer arrays makes the code easier to read and better
maintainable. AFAIK function pointer arrays cause some performance
drawback due to Spectre mitigation, but we're not in a hot path.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/realtek/r8169.c

@@ -699,6 +699,8 @@ struct rtl8169_private {
 	u32 ocp_base;
 };
 
+typedef void (*rtl_generic_fct)(struct rtl8169_private *tp);
+
 MODULE_AUTHOR("Realtek and the Linux r8169 crew <netdev@vger.kernel.org>");
 MODULE_DESCRIPTION("RealTek RTL-8169 Gigabit Ethernet driver");
 module_param_named(debug, debug.msg_enable, int, 0);
@@ -3988,131 +3990,65 @@ static void rtl8106e_hw_phy_config(struct rtl8169_private *tp)
 
 static void rtl_hw_phy_config(struct net_device *dev)
 {
+	static const rtl_generic_fct phy_configs[] = {
+		/* PCI devices. */
+		[RTL_GIGA_MAC_VER_01] = NULL,
+		[RTL_GIGA_MAC_VER_02] = rtl8169s_hw_phy_config,
+		[RTL_GIGA_MAC_VER_03] = rtl8169s_hw_phy_config,
+		[RTL_GIGA_MAC_VER_04] = rtl8169sb_hw_phy_config,
+		[RTL_GIGA_MAC_VER_05] = rtl8169scd_hw_phy_config,
+		[RTL_GIGA_MAC_VER_06] = rtl8169sce_hw_phy_config,
+		/* PCI-E devices. */
+		[RTL_GIGA_MAC_VER_07] = rtl8102e_hw_phy_config,
+		[RTL_GIGA_MAC_VER_08] = rtl8102e_hw_phy_config,
+		[RTL_GIGA_MAC_VER_09] = rtl8102e_hw_phy_config,
+		[RTL_GIGA_MAC_VER_10] = NULL,
+		[RTL_GIGA_MAC_VER_11] = rtl8168bb_hw_phy_config,
+		[RTL_GIGA_MAC_VER_12] = rtl8168bef_hw_phy_config,
+		[RTL_GIGA_MAC_VER_13] = NULL,
+		[RTL_GIGA_MAC_VER_14] = NULL,
+		[RTL_GIGA_MAC_VER_15] = NULL,
+		[RTL_GIGA_MAC_VER_16] = NULL,
+		[RTL_GIGA_MAC_VER_17] = rtl8168bef_hw_phy_config,
+		[RTL_GIGA_MAC_VER_18] = rtl8168cp_1_hw_phy_config,
+		[RTL_GIGA_MAC_VER_19] = rtl8168c_1_hw_phy_config,
+		[RTL_GIGA_MAC_VER_20] = rtl8168c_2_hw_phy_config,
+		[RTL_GIGA_MAC_VER_21] = rtl8168c_3_hw_phy_config,
+		[RTL_GIGA_MAC_VER_22] = rtl8168c_4_hw_phy_config,
+		[RTL_GIGA_MAC_VER_23] = rtl8168cp_2_hw_phy_config,
+		[RTL_GIGA_MAC_VER_24] = rtl8168cp_2_hw_phy_config,
+		[RTL_GIGA_MAC_VER_25] = rtl8168d_1_hw_phy_config,
+		[RTL_GIGA_MAC_VER_26] = rtl8168d_2_hw_phy_config,
+		[RTL_GIGA_MAC_VER_27] = rtl8168d_3_hw_phy_config,
+		[RTL_GIGA_MAC_VER_28] = rtl8168d_4_hw_phy_config,
+		[RTL_GIGA_MAC_VER_29] = rtl8105e_hw_phy_config,
+		[RTL_GIGA_MAC_VER_30] = rtl8105e_hw_phy_config,
+		[RTL_GIGA_MAC_VER_31] = NULL,
+		[RTL_GIGA_MAC_VER_32] = rtl8168e_1_hw_phy_config,
+		[RTL_GIGA_MAC_VER_33] = rtl8168e_1_hw_phy_config,
+		[RTL_GIGA_MAC_VER_34] = rtl8168e_2_hw_phy_config,
+		[RTL_GIGA_MAC_VER_35] = rtl8168f_1_hw_phy_config,
+		[RTL_GIGA_MAC_VER_36] = rtl8168f_2_hw_phy_config,
+		[RTL_GIGA_MAC_VER_37] = rtl8402_hw_phy_config,
+		[RTL_GIGA_MAC_VER_38] = rtl8411_hw_phy_config,
+		[RTL_GIGA_MAC_VER_39] = rtl8106e_hw_phy_config,
+		[RTL_GIGA_MAC_VER_40] = rtl8168g_1_hw_phy_config,
+		[RTL_GIGA_MAC_VER_41] = NULL,
+		[RTL_GIGA_MAC_VER_42] = rtl8168g_2_hw_phy_config,
+		[RTL_GIGA_MAC_VER_43] = rtl8168g_2_hw_phy_config,
+		[RTL_GIGA_MAC_VER_44] = rtl8168g_2_hw_phy_config,
+		[RTL_GIGA_MAC_VER_45] = rtl8168h_1_hw_phy_config,
+		[RTL_GIGA_MAC_VER_46] = rtl8168h_2_hw_phy_config,
+		[RTL_GIGA_MAC_VER_47] = rtl8168h_1_hw_phy_config,
+		[RTL_GIGA_MAC_VER_48] = rtl8168h_2_hw_phy_config,
+		[RTL_GIGA_MAC_VER_49] = rtl8168ep_1_hw_phy_config,
+		[RTL_GIGA_MAC_VER_50] = rtl8168ep_2_hw_phy_config,
+		[RTL_GIGA_MAC_VER_51] = rtl8168ep_2_hw_phy_config,
+	};
 	struct rtl8169_private *tp = netdev_priv(dev);
 
-	switch (tp->mac_version) {
-	case RTL_GIGA_MAC_VER_01:
-		break;
-	case RTL_GIGA_MAC_VER_02:
-	case RTL_GIGA_MAC_VER_03:
-		rtl8169s_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_04:
-		rtl8169sb_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_05:
-		rtl8169scd_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_06:
-		rtl8169sce_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_07:
-	case RTL_GIGA_MAC_VER_08:
-	case RTL_GIGA_MAC_VER_09:
-		rtl8102e_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_11:
-		rtl8168bb_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_12:
-		rtl8168bef_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_17:
-		rtl8168bef_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_18:
-		rtl8168cp_1_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_19:
-		rtl8168c_1_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_20:
-		rtl8168c_2_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_21:
-		rtl8168c_3_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_22:
-		rtl8168c_4_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_23:
-	case RTL_GIGA_MAC_VER_24:
-		rtl8168cp_2_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_25:
-		rtl8168d_1_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_26:
-		rtl8168d_2_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_27:
-		rtl8168d_3_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_28:
-		rtl8168d_4_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_29:
-	case RTL_GIGA_MAC_VER_30:
-		rtl8105e_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_31:
-		/* None. */
-		break;
-	case RTL_GIGA_MAC_VER_32:
-	case RTL_GIGA_MAC_VER_33:
-		rtl8168e_1_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_34:
-		rtl8168e_2_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_35:
-		rtl8168f_1_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_36:
-		rtl8168f_2_hw_phy_config(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_37:
-		rtl8402_hw_phy_config(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_38:
-		rtl8411_hw_phy_config(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_39:
-		rtl8106e_hw_phy_config(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_40:
-		rtl8168g_1_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_42:
-	case RTL_GIGA_MAC_VER_43:
-	case RTL_GIGA_MAC_VER_44:
-		rtl8168g_2_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_45:
-	case RTL_GIGA_MAC_VER_47:
-		rtl8168h_1_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_46:
-	case RTL_GIGA_MAC_VER_48:
-		rtl8168h_2_hw_phy_config(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_49:
-		rtl8168ep_1_hw_phy_config(tp);
-		break;
-	case RTL_GIGA_MAC_VER_50:
-	case RTL_GIGA_MAC_VER_51:
-		rtl8168ep_2_hw_phy_config(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_41:
-	default:
-		break;
-	}
+	if (phy_configs[tp->mac_version])
+		phy_configs[tp->mac_version](tp);
 }
 
 static void rtl_schedule_task(struct rtl8169_private *tp, enum rtl_flag flag)
@@ -5445,122 +5381,6 @@ static void rtl_hw_start_8168ep_3(struct rtl8169_private *tp)
 	rtl_hw_aspm_clkreq_enable(tp, true);
 }
 
-static void rtl_hw_start_8168(struct rtl8169_private *tp)
-{
-	RTL_W8(tp, MaxTxPacketSize, TxPacketMax);
-
-	/* Work around for RxFIFO overflow. */
-	if (tp->mac_version == RTL_GIGA_MAC_VER_11) {
-		tp->irq_mask |= RxFIFOOver;
-		tp->irq_mask &= ~RxOverflow;
-	}
-
-	switch (tp->mac_version) {
-	case RTL_GIGA_MAC_VER_11:
-		rtl_hw_start_8168bb(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_12:
-	case RTL_GIGA_MAC_VER_17:
-		rtl_hw_start_8168bef(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_18:
-		rtl_hw_start_8168cp_1(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_19:
-		rtl_hw_start_8168c_1(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_20:
-		rtl_hw_start_8168c_2(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_21:
-		rtl_hw_start_8168c_3(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_22:
-		rtl_hw_start_8168c_4(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_23:
-		rtl_hw_start_8168cp_2(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_24:
-		rtl_hw_start_8168cp_3(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_25:
-	case RTL_GIGA_MAC_VER_26:
-	case RTL_GIGA_MAC_VER_27:
-		rtl_hw_start_8168d(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_28:
-		rtl_hw_start_8168d_4(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_31:
-		rtl_hw_start_8168dp(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_32:
-	case RTL_GIGA_MAC_VER_33:
-		rtl_hw_start_8168e_1(tp);
-		break;
-	case RTL_GIGA_MAC_VER_34:
-		rtl_hw_start_8168e_2(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_35:
-	case RTL_GIGA_MAC_VER_36:
-		rtl_hw_start_8168f_1(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_38:
-		rtl_hw_start_8411(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_40:
-	case RTL_GIGA_MAC_VER_41:
-		rtl_hw_start_8168g_1(tp);
-		break;
-	case RTL_GIGA_MAC_VER_42:
-		rtl_hw_start_8168g_2(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_44:
-		rtl_hw_start_8411_2(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_45:
-	case RTL_GIGA_MAC_VER_46:
-		rtl_hw_start_8168h_1(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_49:
-		rtl_hw_start_8168ep_1(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_50:
-		rtl_hw_start_8168ep_2(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_51:
-		rtl_hw_start_8168ep_3(tp);
-		break;
-
-	default:
-		netif_err(tp, drv, tp->dev,
-			  "unknown chipset (mac_version = %d)\n",
-			  tp->mac_version);
-		break;
-	}
-}
-
 static void rtl_hw_start_8102e_1(struct rtl8169_private *tp)
 {
 	static const struct ephy_info e_info_8102e_1[] = {
@@ -5686,6 +5506,73 @@ static void rtl_hw_start_8106(struct rtl8169_private *tp)
 	rtl_hw_aspm_clkreq_enable(tp, true);
 }
 
+static void rtl_hw_config(struct rtl8169_private *tp)
+{
+	static const rtl_generic_fct hw_configs[] = {
+		[RTL_GIGA_MAC_VER_07] = rtl_hw_start_8102e_1,
+		[RTL_GIGA_MAC_VER_08] = rtl_hw_start_8102e_3,
+		[RTL_GIGA_MAC_VER_09] = rtl_hw_start_8102e_2,
+		[RTL_GIGA_MAC_VER_10] = NULL,
+		[RTL_GIGA_MAC_VER_11] = rtl_hw_start_8168bb,
+		[RTL_GIGA_MAC_VER_12] = rtl_hw_start_8168bef,
+		[RTL_GIGA_MAC_VER_13] = NULL,
+		[RTL_GIGA_MAC_VER_14] = NULL,
+		[RTL_GIGA_MAC_VER_15] = NULL,
+		[RTL_GIGA_MAC_VER_16] = NULL,
+		[RTL_GIGA_MAC_VER_17] = rtl_hw_start_8168bef,
+		[RTL_GIGA_MAC_VER_18] = rtl_hw_start_8168cp_1,
+		[RTL_GIGA_MAC_VER_19] = rtl_hw_start_8168c_1,
+		[RTL_GIGA_MAC_VER_20] = rtl_hw_start_8168c_2,
+		[RTL_GIGA_MAC_VER_21] = rtl_hw_start_8168c_3,
+		[RTL_GIGA_MAC_VER_22] = rtl_hw_start_8168c_4,
+		[RTL_GIGA_MAC_VER_23] = rtl_hw_start_8168cp_2,
+		[RTL_GIGA_MAC_VER_24] = rtl_hw_start_8168cp_3,
+		[RTL_GIGA_MAC_VER_25] = rtl_hw_start_8168d,
+		[RTL_GIGA_MAC_VER_26] = rtl_hw_start_8168d,
+		[RTL_GIGA_MAC_VER_27] = rtl_hw_start_8168d,
+		[RTL_GIGA_MAC_VER_28] = rtl_hw_start_8168d_4,
+		[RTL_GIGA_MAC_VER_29] = rtl_hw_start_8105e_1,
+		[RTL_GIGA_MAC_VER_30] = rtl_hw_start_8105e_2,
+		[RTL_GIGA_MAC_VER_31] = rtl_hw_start_8168dp,
+		[RTL_GIGA_MAC_VER_32] = rtl_hw_start_8168e_1,
+		[RTL_GIGA_MAC_VER_33] = rtl_hw_start_8168e_1,
+		[RTL_GIGA_MAC_VER_34] = rtl_hw_start_8168e_2,
+		[RTL_GIGA_MAC_VER_35] = rtl_hw_start_8168f_1,
+		[RTL_GIGA_MAC_VER_36] = rtl_hw_start_8168f_1,
+		[RTL_GIGA_MAC_VER_37] = rtl_hw_start_8402,
+		[RTL_GIGA_MAC_VER_38] = rtl_hw_start_8411,
+		[RTL_GIGA_MAC_VER_39] = rtl_hw_start_8106,
+		[RTL_GIGA_MAC_VER_40] = rtl_hw_start_8168g_1,
+		[RTL_GIGA_MAC_VER_41] = rtl_hw_start_8168g_1,
+		[RTL_GIGA_MAC_VER_42] = rtl_hw_start_8168g_2,
+		[RTL_GIGA_MAC_VER_43] = rtl_hw_start_8168g_2,
+		[RTL_GIGA_MAC_VER_44] = rtl_hw_start_8411_2,
+		[RTL_GIGA_MAC_VER_45] = rtl_hw_start_8168h_1,
+		[RTL_GIGA_MAC_VER_46] = rtl_hw_start_8168h_1,
+		[RTL_GIGA_MAC_VER_47] = rtl_hw_start_8168h_1,
+		[RTL_GIGA_MAC_VER_48] = rtl_hw_start_8168h_1,
+		[RTL_GIGA_MAC_VER_49] = rtl_hw_start_8168ep_1,
+		[RTL_GIGA_MAC_VER_50] = rtl_hw_start_8168ep_2,
+		[RTL_GIGA_MAC_VER_51] = rtl_hw_start_8168ep_3,
+	};
+
+	if (hw_configs[tp->mac_version])
+		hw_configs[tp->mac_version](tp);
+}
+
+static void rtl_hw_start_8168(struct rtl8169_private *tp)
+{
+	RTL_W8(tp, MaxTxPacketSize, TxPacketMax);
+
+	/* Workaround for RxFIFO overflow. */
+	if (tp->mac_version == RTL_GIGA_MAC_VER_11) {
+		tp->irq_mask |= RxFIFOOver;
+		tp->irq_mask &= ~RxOverflow;
+	}
+
+	rtl_hw_config(tp);
+}
+
 static void rtl_hw_start_8101(struct rtl8169_private *tp)
 {
 	if (tp->mac_version >= RTL_GIGA_MAC_VER_30)
@@ -5701,41 +5588,7 @@ static void rtl_hw_start_8101(struct rtl8169_private *tp)
 	tp->cp_cmd &= CPCMD_QUIRK_MASK;
 	RTL_W16(tp, CPlusCmd, tp->cp_cmd);
 
-	switch (tp->mac_version) {
-	case RTL_GIGA_MAC_VER_07:
-		rtl_hw_start_8102e_1(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_08:
-		rtl_hw_start_8102e_3(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_09:
-		rtl_hw_start_8102e_2(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_29:
-		rtl_hw_start_8105e_1(tp);
-		break;
-	case RTL_GIGA_MAC_VER_30:
-		rtl_hw_start_8105e_2(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_37:
-		rtl_hw_start_8402(tp);
-		break;
-
-	case RTL_GIGA_MAC_VER_39:
-		rtl_hw_start_8106(tp);
-		break;
-	case RTL_GIGA_MAC_VER_43:
-		rtl_hw_start_8168g_2(tp);
-		break;
-	case RTL_GIGA_MAC_VER_47:
-	case RTL_GIGA_MAC_VER_48:
-		rtl_hw_start_8168h_1(tp);
-		break;
-	}
+	rtl_hw_config(tp);
 }
 
 static int rtl8169_change_mtu(struct net_device *dev, int new_mtu)