[PATCH net-next v4 0/2] r8169: add dash and LTR support

[PATCH net-next v4 0/2] r8169: add dash and LTR support

[javen]

From: Javen Xu <javen_xu@realsil.com.cn>

This series patch adds dash support for RTL8127AP and LTR support for
RTL8168FP/RTL8168EP/RTL8168H/RTL8125/RTL8126/RTL8127.

---
Changes in v2:
- Replace some register numbers with names according to the datasheet.
- Link to v1: https://lore.kernel.org/netdev/20260106083012.164-1-javen_xu@realsil.com.cn/

Changes in v3:
- Address some checkpatch warnings and remove rtl_disable_ltr().
- Link to v2: https://lore.kernel.org/netdev/20260108023523.1019-1-javen_xu@realsil.com.cn/

Changes in v4:
- Fix some formatting issues.
- Link to v3: https://lore.kernel.org/netdev/20260109064230.1094-1-javen_xu@realsil.com.cn/
---

Javen Xu (2):
  r8169: add DASH support for RTL8127AP
  r8169: enable LTR support

 drivers/net/ethernet/realtek/r8169_main.c | 102 ++++++++++++++++++++++
 1 file changed, 102 insertions(+)

-- 
2.43.0

[PATCH net-next v4 1/2] r8169: add DASH support for RTL8127AP

[javen]

From: Javen Xu <javen_xu@realsil.com.cn>

This adds DASH support for chip RTL8127AP. Its mac version is
RTL_GIGA_MAC_VER_80 and revision id is 0x04. DASH is a standard for
remote management of network device, allowing out-of-band control.

Signed-off-by: Javen Xu <javen_xu@realsil.com.cn>
---
 drivers/net/ethernet/realtek/r8169_main.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 755083852eef..f9df6aadacce 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -1513,6 +1513,10 @@ static enum rtl_dash_type rtl_get_dash_type(struct rtl8169_private *tp)
 		return RTL_DASH_EP;
 	case RTL_GIGA_MAC_VER_66:
 		return RTL_DASH_25_BP;
+	case RTL_GIGA_MAC_VER_80:
+		return (tp->pci_dev->revision == 0x04)
+			? RTL_DASH_25_BP
+			: RTL_DASH_NONE;
 	default:
 		return RTL_DASH_NONE;
 	}
-- 
2.43.0

[PATCH net-next v4 2/2] r8169: enable LTR support

[javen]

From: Javen Xu <javen_xu@realsil.com.cn>

This patch will enable
RTL8168FP/RTL8168EP/RTL8168H/RTL8125/RTL8126/RTL8127 LTR support.

Signed-off-by: Javen Xu <javen_xu@realsil.com.cn>

---
v2: Replace some register numbers with names according to datasheet.
v3: Address some checkpatch warnings and remove rtl_ltr_disable().
v4: Fix some formatting changes.
---
 drivers/net/ethernet/realtek/r8169_main.c | 98 +++++++++++++++++++++++
 1 file changed, 98 insertions(+)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index f9df6aadacce..9b89bbf67198 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -312,6 +312,15 @@ enum rtl_registers {
 	IBIMR0          = 0xfa,
 	IBISR0          = 0xfb,
 	FuncForceEvent	= 0xfc,
+
+	ALDPS_LTR	= 0xe0a2,
+	LTR_OBFF_LOCK	= 0xe032,
+	LTR_SNOOP	= 0xe034,
+
+#define ALDPS_LTR_EN			BIT(0)
+#define LTR_OBFF_LOCK_EN		BIT(0)
+#define LINK_SPEED_CHANGE_EN		BIT(14)
+#define LTR_SNOOP_EN			GENMASK(15, 14)
 };
 
 enum rtl8168_8101_registers {
@@ -397,6 +406,8 @@ enum rtl8168_registers {
 #define PWM_EN				(1 << 22)
 #define RXDV_GATED_EN			(1 << 19)
 #define EARLY_TALLY_EN			(1 << 16)
+	COMBO_LTR_EXTEND	= 0xb6,
+#define COMBO_LTR_EXTEND_EN	BIT(0)
 };
 
 enum rtl8125_registers {
@@ -2919,6 +2930,92 @@ static void rtl_disable_exit_l1(struct rtl8169_private *tp)
 	}
 }
 
+static void rtl_enable_ltr(struct rtl8169_private *tp)
+{
+	switch (tp->mac_version) {
+	case RTL_GIGA_MAC_VER_80:
+		r8168_mac_ocp_write(tp, 0xcdd0, 0x9003);
+		r8168_mac_ocp_modify(tp, LTR_SNOOP, 0x0000, LTR_SNOOP_EN);
+		r8168_mac_ocp_modify(tp, ALDPS_LTR, 0x0000, ALDPS_LTR_EN);
+		r8168_mac_ocp_write(tp, 0xcdd2, 0x8c09);
+		r8168_mac_ocp_write(tp, 0xcdd8, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdd4, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdda, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdd6, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcddc, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcde8, 0x887a);
+		r8168_mac_ocp_write(tp, 0xcdea, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdec, 0x8c09);
+		r8168_mac_ocp_write(tp, 0xcdee, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdf0, 0x8a62);
+		r8168_mac_ocp_write(tp, 0xcdf2, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdf4, 0x883e);
+		r8168_mac_ocp_write(tp, 0xcdf6, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdf8, 0x8849);
+		r8168_mac_ocp_write(tp, 0xcdfa, 0x9003);
+		r8168_mac_ocp_modify(tp, LTR_OBFF_LOCK, 0x0000, LINK_SPEED_CHANGE_EN);
+		break;
+	case RTL_GIGA_MAC_VER_70:
+		r8168_mac_ocp_write(tp, 0xcdd0, 0x9003);
+		r8168_mac_ocp_modify(tp, LTR_SNOOP, 0x0000, LTR_SNOOP_EN);
+		r8168_mac_ocp_modify(tp, ALDPS_LTR, 0x0000, ALDPS_LTR_EN);
+		r8168_mac_ocp_write(tp, 0xcdd2, 0x8c09);
+		r8168_mac_ocp_write(tp, 0xcdd8, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdd4, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdda, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdd6, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcddc, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcde8, 0x887a);
+		r8168_mac_ocp_write(tp, 0xcdea, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdec, 0x8c09);
+		r8168_mac_ocp_write(tp, 0xcdee, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdf0, 0x8a62);
+		r8168_mac_ocp_write(tp, 0xcdf2, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdf4, 0x883e);
+		r8168_mac_ocp_write(tp, 0xcdf6, 0x9003);
+		r8168_mac_ocp_modify(tp, LTR_OBFF_LOCK, 0x0000, LINK_SPEED_CHANGE_EN);
+		break;
+	case RTL_GIGA_MAC_VER_61 ... RTL_GIGA_MAC_VER_66:
+		r8168_mac_ocp_write(tp, 0xcdd0, 0x9003);
+		r8168_mac_ocp_modify(tp, LTR_SNOOP, 0x0000, LTR_SNOOP_EN);
+		r8168_mac_ocp_modify(tp, ALDPS_LTR, 0x0000, ALDPS_LTR_EN);
+		r8168_mac_ocp_write(tp, 0xcdd2, 0x889c);
+		r8168_mac_ocp_write(tp, 0xcdd8, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdd4, 0x8c30);
+		r8168_mac_ocp_write(tp, 0xcdda, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdd6, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcddc, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcde8, 0x883e);
+		r8168_mac_ocp_write(tp, 0xcdea, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdec, 0x889c);
+		r8168_mac_ocp_write(tp, 0xcdee, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdf0, 0x8C09);
+		r8168_mac_ocp_write(tp, 0xcdf2, 0x9003);
+		r8168_mac_ocp_modify(tp, LTR_OBFF_LOCK, 0x0000, LINK_SPEED_CHANGE_EN);
+		break;
+	case RTL_GIGA_MAC_VER_46 ... RTL_GIGA_MAC_VER_48:
+	case RTL_GIGA_MAC_VER_52:
+		r8168_mac_ocp_modify(tp, ALDPS_LTR, 0x0000, ALDPS_LTR_EN);
+		RTL_W8(tp, COMBO_LTR_EXTEND, RTL_R8(tp, COMBO_LTR_EXTEND) | COMBO_LTR_EXTEND_EN);
+		fallthrough;
+	case RTL_GIGA_MAC_VER_51:
+		r8168_mac_ocp_modify(tp, LTR_SNOOP, 0x0000, LTR_SNOOP_EN);
+		r8168_mac_ocp_write(tp, 0xe02c, 0x1880);
+		r8168_mac_ocp_write(tp, 0xe02e, 0x4880);
+		r8168_mac_ocp_write(tp, 0xcdd8, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdda, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcddc, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdd2, 0x883c);
+		r8168_mac_ocp_write(tp, 0xcdd4, 0x8c12);
+		r8168_mac_ocp_write(tp, 0xcdd6, 0x9003);
+		break;
+	default:
+		return;
+	}
+	/* chip can trigger LTR */
+	r8168_mac_ocp_modify(tp, LTR_OBFF_LOCK, 0x0003, LTR_OBFF_LOCK_EN);
+}
+
 static void rtl_hw_aspm_clkreq_enable(struct rtl8169_private *tp, bool enable)
 {
 	u8 val8;
@@ -2947,6 +3044,7 @@ static void rtl_hw_aspm_clkreq_enable(struct rtl8169_private *tp, bool enable)
 			break;
 		}
 
+		rtl_enable_ltr(tp);
 		switch (tp->mac_version) {
 		case RTL_GIGA_MAC_VER_46 ... RTL_GIGA_MAC_VER_48:
 		case RTL_GIGA_MAC_VER_61 ... RTL_GIGA_MAC_VER_LAST:
-- 
2.43.0

Re: [PATCH net-next v4 0/2] r8169: add dash and LTR support

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (main)
by Paolo Abeni <pabeni@redhat.com>:

On Fri, 9 Jan 2026 15:04:13 +0800 you wrote:
> From: Javen Xu <javen_xu@realsil.com.cn>
> 
> This series patch adds dash support for RTL8127AP and LTR support for
> RTL8168FP/RTL8168EP/RTL8168H/RTL8125/RTL8126/RTL8127.
> 
> ---
> Changes in v2:
> - Replace some register numbers with names according to the datasheet.
> - Link to v1: https://lore.kernel.org/netdev/20260106083012.164-1-javen_xu@realsil.com.cn/
> 
> [...]

Here is the summary with links:
  - [net-next,v4,1/2] r8169: add DASH support for RTL8127AP
    https://git.kernel.org/netdev/net-next/c/3259d2cf9427
  - [net-next,v4,2/2] r8169: enable LTR support
    https://git.kernel.org/netdev/net-next/c/9ab94a32af70

You are awesome, thank you!
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