[PATCH net-next 0/4] r8169: sync few functionalities with vendor driver

[PATCH net-next 0/4] r8169: sync few functionalities with vendor driver

[Heiner Kallweit]

Add few helpers (with names copied from vendor drivers) to make clearer
what the respective code is doing. In addition improve reset preparation
for chips from RTL8168g.

Heiner Kallweit (4):
  r8169: add helper r8168g_wait_ll_share_fifo_ready
  r8169: add helper rtl_enable_rxdvgate
  r8169: add helper rtl_wait_txrx_fifo_empty
  r8169: improve reset handling for chips from RTL8168g

 drivers/net/ethernet/realtek/r8169_main.c | 63 ++++++++++++++---------
 1 file changed, 39 insertions(+), 24 deletions(-)

-- 
2.26.2

[PATCH net-next 1/4] r8169: add helper r8168g_wait_ll_share_fifo_ready

[Heiner Kallweit]

Create a helper for this waiting function, name of the helper is
borrowed from the vendor driver. In addition don't return in the two
hw_init functions if the first wait runs into a timeout, there's no
benefit in doing so.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 drivers/net/ethernet/realtek/r8169_main.c | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 8c41f6848..1c96fc219 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -5057,6 +5057,11 @@ DECLARE_RTL_COND(rtl_link_list_ready_cond)
 	return RTL_R8(tp, MCU) & LINK_LIST_RDY;
 }
 
+static void r8168g_wait_ll_share_fifo_ready(struct rtl8169_private *tp)
+{
+	rtl_loop_wait_high(tp, &rtl_link_list_ready_cond, 100, 42);
+}
+
 DECLARE_RTL_COND(rtl_rxtx_empty_cond)
 {
 	return (RTL_R8(tp, MCU) & RXTX_EMPTY) == RXTX_EMPTY;
@@ -5141,13 +5146,10 @@ static void rtl_hw_init_8168g(struct rtl8169_private *tp)
 	RTL_W8(tp, MCU, RTL_R8(tp, MCU) & ~NOW_IS_OOB);
 
 	r8168_mac_ocp_modify(tp, 0xe8de, BIT(14), 0);
-
-	if (!rtl_loop_wait_high(tp, &rtl_link_list_ready_cond, 100, 42))
-		return;
+	r8168g_wait_ll_share_fifo_ready(tp);
 
 	r8168_mac_ocp_modify(tp, 0xe8de, 0, BIT(15));
-
-	rtl_loop_wait_high(tp, &rtl_link_list_ready_cond, 100, 42);
+	r8168g_wait_ll_share_fifo_ready(tp);
 }
 
 static void rtl_hw_init_8125(struct rtl8169_private *tp)
@@ -5162,15 +5164,12 @@ static void rtl_hw_init_8125(struct rtl8169_private *tp)
 	RTL_W8(tp, MCU, RTL_R8(tp, MCU) & ~NOW_IS_OOB);
 
 	r8168_mac_ocp_modify(tp, 0xe8de, BIT(14), 0);
-
-	if (!rtl_loop_wait_high(tp, &rtl_link_list_ready_cond, 100, 42))
-		return;
+	r8168g_wait_ll_share_fifo_ready(tp);
 
 	r8168_mac_ocp_write(tp, 0xc0aa, 0x07d0);
 	r8168_mac_ocp_write(tp, 0xc0a6, 0x0150);
 	r8168_mac_ocp_write(tp, 0xc01e, 0x5555);
-
-	rtl_loop_wait_high(tp, &rtl_link_list_ready_cond, 100, 42);
+	r8168g_wait_ll_share_fifo_ready(tp);
 }
 
 static void rtl_hw_initialize(struct rtl8169_private *tp)
-- 
2.26.2

[PATCH net-next 2/4] r8169: add helper rtl_enable_rxdvgate

[Heiner Kallweit]

Add a helper for setting RXDV_GATED_EN, the 2ms delay is copied from
the vendor driver.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 drivers/net/ethernet/realtek/r8169_main.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 1c96fc219..eb26c3477 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -2496,6 +2496,12 @@ DECLARE_RTL_COND(rtl_txcfg_empty_cond)
 	return RTL_R32(tp, TxConfig) & TXCFG_EMPTY;
 }
 
+static void rtl_enable_rxdvgate(struct rtl8169_private *tp)
+{
+	RTL_W32(tp, MISC, RTL_R32(tp, MISC) | RXDV_GATED_EN);
+	fsleep(2000);
+}
+
 static void rtl8169_hw_reset(struct rtl8169_private *tp)
 {
 	/* Disable interrupts */
@@ -5133,7 +5139,7 @@ static int r8169_mdio_register(struct rtl8169_private *tp)
 
 static void rtl_hw_init_8168g(struct rtl8169_private *tp)
 {
-	RTL_W32(tp, MISC, RTL_R32(tp, MISC) | RXDV_GATED_EN);
+	rtl_enable_rxdvgate(tp);
 
 	if (!rtl_loop_wait_high(tp, &rtl_txcfg_empty_cond, 100, 42))
 		return;
@@ -5154,7 +5160,7 @@ static void rtl_hw_init_8168g(struct rtl8169_private *tp)
 
 static void rtl_hw_init_8125(struct rtl8169_private *tp)
 {
-	RTL_W32(tp, MISC, RTL_R32(tp, MISC) | RXDV_GATED_EN);
+	rtl_enable_rxdvgate(tp);
 
 	if (!rtl_loop_wait_high(tp, &rtl_rxtx_empty_cond, 100, 42))
 		return;
-- 
2.26.2

[PATCH net-next 3/4] r8169: add helper rtl_wait_txrx_fifo_empty

[Heiner Kallweit]

Add a helper for waiting for FIFO's to be empty, again the name is
borrowed from the vendor driver.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 drivers/net/ethernet/realtek/r8169_main.c | 35 ++++++++++++++---------
 1 file changed, 21 insertions(+), 14 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index eb26c3477..7ea58bd9b 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -2496,10 +2496,31 @@ DECLARE_RTL_COND(rtl_txcfg_empty_cond)
 	return RTL_R32(tp, TxConfig) & TXCFG_EMPTY;
 }
 
+DECLARE_RTL_COND(rtl_rxtx_empty_cond)
+{
+	return (RTL_R8(tp, MCU) & RXTX_EMPTY) == RXTX_EMPTY;
+}
+
+static void rtl_wait_txrx_fifo_empty(struct rtl8169_private *tp)
+{
+	switch (tp->mac_version) {
+	case RTL_GIGA_MAC_VER_40 ... RTL_GIGA_MAC_VER_52:
+		rtl_loop_wait_high(tp, &rtl_txcfg_empty_cond, 100, 42);
+		rtl_loop_wait_high(tp, &rtl_rxtx_empty_cond, 100, 42);
+		break;
+	case RTL_GIGA_MAC_VER_60 ... RTL_GIGA_MAC_VER_61:
+		rtl_loop_wait_high(tp, &rtl_rxtx_empty_cond, 100, 42);
+		break;
+	default:
+		break;
+	}
+}
+
 static void rtl_enable_rxdvgate(struct rtl8169_private *tp)
 {
 	RTL_W32(tp, MISC, RTL_R32(tp, MISC) | RXDV_GATED_EN);
 	fsleep(2000);
+	rtl_wait_txrx_fifo_empty(tp);
 }
 
 static void rtl8169_hw_reset(struct rtl8169_private *tp)
@@ -5068,11 +5089,6 @@ static void r8168g_wait_ll_share_fifo_ready(struct rtl8169_private *tp)
 	rtl_loop_wait_high(tp, &rtl_link_list_ready_cond, 100, 42);
 }
 
-DECLARE_RTL_COND(rtl_rxtx_empty_cond)
-{
-	return (RTL_R8(tp, MCU) & RXTX_EMPTY) == RXTX_EMPTY;
-}
-
 static int r8169_mdio_read_reg(struct mii_bus *mii_bus, int phyaddr, int phyreg)
 {
 	struct rtl8169_private *tp = mii_bus->priv;
@@ -5141,12 +5157,6 @@ static void rtl_hw_init_8168g(struct rtl8169_private *tp)
 {
 	rtl_enable_rxdvgate(tp);
 
-	if (!rtl_loop_wait_high(tp, &rtl_txcfg_empty_cond, 100, 42))
-		return;
-
-	if (!rtl_loop_wait_high(tp, &rtl_rxtx_empty_cond, 100, 42))
-		return;
-
 	RTL_W8(tp, ChipCmd, RTL_R8(tp, ChipCmd) & ~(CmdTxEnb | CmdRxEnb));
 	msleep(1);
 	RTL_W8(tp, MCU, RTL_R8(tp, MCU) & ~NOW_IS_OOB);
@@ -5162,9 +5172,6 @@ static void rtl_hw_init_8125(struct rtl8169_private *tp)
 {
 	rtl_enable_rxdvgate(tp);
 
-	if (!rtl_loop_wait_high(tp, &rtl_rxtx_empty_cond, 100, 42))
-		return;
-
 	RTL_W8(tp, ChipCmd, RTL_R8(tp, ChipCmd) & ~(CmdTxEnb | CmdRxEnb));
 	msleep(1);
 	RTL_W8(tp, MCU, RTL_R8(tp, MCU) & ~NOW_IS_OOB);
-- 
2.26.2

[PATCH net-next 4/4] r8169: improve reset handling for chips from RTL8168g

[Heiner Kallweit]

Sync the reset preparation for chips from RTL8168g with the r8168 and
r8125 vendor drivers.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 drivers/net/ethernet/realtek/r8169_main.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 7ea58bd9b..0e96d0de2 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -2537,10 +2537,13 @@ static void rtl8169_hw_reset(struct rtl8169_private *tp)
 		rtl_loop_wait_low(tp, &rtl_npq_cond, 20, 2000);
 		break;
 	case RTL_GIGA_MAC_VER_34 ... RTL_GIGA_MAC_VER_38:
-	case RTL_GIGA_MAC_VER_40 ... RTL_GIGA_MAC_VER_52:
 		RTL_W8(tp, ChipCmd, RTL_R8(tp, ChipCmd) | StopReq);
 		rtl_loop_wait_high(tp, &rtl_txcfg_empty_cond, 100, 666);
 		break;
+	case RTL_GIGA_MAC_VER_40 ... RTL_GIGA_MAC_VER_61:
+		rtl_enable_rxdvgate(tp);
+		fsleep(2000);
+		break;
 	default:
 		RTL_W8(tp, ChipCmd, RTL_R8(tp, ChipCmd) | StopReq);
 		udelay(100);
-- 
2.26.2

Re: [PATCH net-next 0/4] r8169: sync few functionalities with vendor driver

[Jakub Kicinski]

On Fri, 8 May 2020 23:28:51 +0200 Heiner Kallweit wrote:
> Add few helpers (with names copied from vendor drivers) to make clearer
> what the respective code is doing. In addition improve reset preparation
> for chips from RTL8168g.

Applied, thank you!