[PATCH v2 0/2] meson8b-odroidc1: ethernet support

[PATCH v2 0/2] meson8b-odroidc1: ethernet support

[Emiliano Ingrassia]

This patchset, tested on an Odroid-C1+ board, enables ethernet support
on Odroid-C1/C1+ boards, improving and extending the ethernet description
in the relative device tree.

In particular:
- enables the Meson8b ethernet controller pin multiplexing;
- fixes and extends the Meson8b ethernet controller description;
- adds the Odroid-C1+ ethernet PHY description and enables the
  ethernet controller.

This patchset depends on patchset "dwmac-meson8b: clock fixes for Meson8b".

Emiliano Ingrassia (2):
  ARM: dts: meson8b: extend ethernet controller description
  ARM: dts: meson8b-odroidc1: ethernet support

 arch/arm/boot/dts/meson8b-odroidc1.dts | 30 +++++++++++++++++++++++++++++
 arch/arm/boot/dts/meson8b.dtsi         | 35 ++++++++++++++++++++++++++++++++--
 2 files changed, 63 insertions(+), 2 deletions(-)

-- 
2.15.1

[PATCH v2 1/2] ARM: dts: meson8b: extend ethernet controller description

[Emiliano Ingrassia]

Enable S805 (aka Meson8b) ethernet pin multiplexing and
extend the controller description.
The programmable ethernet (PRG_ETHERNET) register address
value (0xc1108108), contained in meson.dtsi, is overridden
according to the value found in S805 SoC manual.
This also required to switch to "amlogic,meson8b-dwmac" compatible
to correctly configure that register.
The two clock sources "clkin0" and "clkin1" are both equals
to MPLL2 because, as reported in bit 9-7 register description,
that is the only Meson8b ethernet clock source.

Signed-off-by: Emiliano Ingrassia <ingrassia@epigenesys.com>
---
 arch/arm/boot/dts/meson8b.dtsi | 35 +++++++++++++++++++++++++++++++++--
 1 file changed, 33 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/meson8b.dtsi b/arch/arm/boot/dts/meson8b.dtsi
index d75e0ceda8bb..fa5274aa370b 100644
--- a/arch/arm/boot/dts/meson8b.dtsi
+++ b/arch/arm/boot/dts/meson8b.dtsi
@@ -185,6 +185,27 @@
 			#gpio-cells = <2>;
 			gpio-ranges = <&pinctrl_cbus 0 0 130>;
 		};
+
+		eth_rgmii_pins: eth-rgmii {
+			mux {
+				groups = "eth_tx_clk",
+					 "eth_tx_en",
+					 "eth_txd1_0",
+					 "eth_txd1_1",
+					 "eth_txd0_0",
+					 "eth_txd0_1",
+					 "eth_rx_clk",
+					 "eth_rx_dv",
+					 "eth_rxd1",
+					 "eth_rxd0",
+					 "eth_mdio_en",
+					 "eth_mdc",
+					 "eth_ref_clk",
+					 "eth_txd2",
+					 "eth_txd3";
+				function = "ethernet";
+			};
+		};
 	};
 };
 
@@ -203,8 +224,18 @@
 };
 
 &ethmac {
-	clocks = <&clkc CLKID_ETH>;
-	clock-names = "stmmaceth";
+	compatible = "amlogic,meson8b-dwmac", "snps,dwmac-3.70a", "snps,dwmac";
+
+	reg = <0xc9410000 0x10000
+	       0xc1108140 0x4>;
+
+	clocks = <&clkc CLKID_ETH>,
+		 <&clkc CLKID_MPLL2>,
+		 <&clkc CLKID_MPLL2>;
+	clock-names = "stmmaceth", "clkin0", "clkin1";
+
+	resets = <&reset RESET_ETHERNET>;
+	reset-names = "stmmaceth";
 };
 
 &gpio_intc {
-- 
2.15.1

[PATCH v2 2/2] ARM: dts: meson8b-odroidc1: ethernet support

[Emiliano Ingrassia]

The Odroid-C1+ board is equipped with an RTL8211F ethernet PHY
which supports 10/100/1000 Mbps ethernet.
The PHY reset and interrupt lines are controlled by the SoC via
two GPIO lines (GPIOH_4 and GPIOH_3 respectively).
The PHY energy efficient ethernet (eee) mode is marked as broken
using "eee-broken-1000t" because, during tests, high packet losses
were experienced without it.

Signed-off-by: Emiliano Ingrassia <ingrassia@epigenesys.com>
---
 arch/arm/boot/dts/meson8b-odroidc1.dts | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/arch/arm/boot/dts/meson8b-odroidc1.dts b/arch/arm/boot/dts/meson8b-odroidc1.dts
index 9ff6ca4e20d0..d5e83051bb54 100644
--- a/arch/arm/boot/dts/meson8b-odroidc1.dts
+++ b/arch/arm/boot/dts/meson8b-odroidc1.dts
@@ -99,3 +99,33 @@
 &usb1 {
 	status = "okay";
 };
+
+&ethmac {
+	status = "okay";
+
+	snps,reset-gpio = <&gpio GPIOH_4 GPIO_ACTIVE_HIGH>;
+	snps,reset-active-low;
+	snps,reset-delays-us = <0 10000 30000>;
+
+	pinctrl-0 = <&eth_rgmii_pins>;
+	pinctrl-names = "default";
+
+	phy-mode = "rgmii";
+	phy-handle = <&eth_phy>;
+	amlogic,tx-delay-ns = <4>;
+
+	mdio {
+		compatible = "snps,dwmac-mdio";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		/* Realtek RTL8211F (0x001cc916) */
+		eth_phy: ethernet-phy at 0 {
+			reg = <0>;
+			eee-broken-1000t;
+			interrupt-parent = <&gpio_intc>;
+			/* GPIOH_3 */
+			interrupts = <17 IRQ_TYPE_LEVEL_LOW>;
+		};
+	};
+};
-- 
2.15.1

[PATCH v2 2/2] ARM: dts: meson8b-odroidc1: ethernet support

[Linus Lüssing]

Hi Emiliano,

On Fri, Jan 19, 2018 at 02:49:17AM +0100, Emiliano Ingrassia wrote:
> The Odroid-C1+ board is equipped with an RTL8211F ethernet PHY
> which supports 10/100/1000 Mbps ethernet.
> The PHY reset and interrupt lines are controlled by the SoC via
> two GPIO lines (GPIOH_4 and GPIOH_3 respectively).
> The PHY energy efficient ethernet (eee) mode is marked as broken
> using "eee-broken-1000t" because, during tests, high packet losses
> were experienced without it.
> 
> Signed-off-by: Emiliano Ingrassia <ingrassia@epigenesys.com>

I tested your patches on a 4.15-rc8 kernel with the following
patches on top:

f120580deba4 ARM: dts: meson8b-odroidc1: ethernet support
22a6d87b9ee2 ARM: dts: meson8b: extend ethernet controller description
6d053e5f1f3b net: stmmac: dwmac-meson8b: propagate rate changes to the parent clock
8a5f3df5bcfa net: stmmac: dwmac-meson8b: fix setting the RGMII TX clock on Meson8b
c045d6785ec7 net: stmmac: dwmac-meson8b: fix internal RGMII clock configuration
6b63adce0b60 net: stmmac: dwmac-meson8b: only configure the clocks in RGMII mode
9e8946eda815 clk: meson: mpll: use 64-bit maths in params_from_rate

And config file created via multiv7_defconfig.

I tested against a laptop with an Intel Core2Duo and an Intel
82567LM Gigabit network card.

These are the results I get with iperf3, running for 120s for each
test:

# Direct Gigabit connection between Odroid C1+ and the laptop:

Odroid C1+ -> Laptop: 646MBit/s
Laptop -> Odroid C1+: 239MBit/s

# 100Mbit forced via 'ethtool advertise 0x008' on laptop:

Odroid C1+ -> Laptop: 84.6MBit/s
Laptop -> Odroid C1+: 52.7MBit/s

# Connection with a Gigabit switch in between:

Odroid C1+ -> GBit-SW -> Laptop: 626MBit/s
Laptop -> GBit-SW -> Odroid C1+: 248MBit/s

# Connection with a 100MBit switch in between:

Odroid C1+ -> 100MBit-SW -> Laptop: 91.7MBit/s
Laptop -> 100MBit-SW -> Odroid C1+: 43.7MBit/s


Not quite sure why RX is somehow slower than TX on the C1+.
But other than that looks great :-). Many thanks to
everyone who had contributed!

Tested-by: Linus L?ssing <linus.luessing@c0d3.blue>

[PATCH v2 1/2] ARM: dts: meson8b: extend ethernet controller description

[Linus Lüssing]

On Fri, Jan 19, 2018 at 02:48:00AM +0100, Emiliano Ingrassia wrote:
> Enable S805 (aka Meson8b) ethernet pin multiplexing and
> extend the controller description.
> The programmable ethernet (PRG_ETHERNET) register address
> value (0xc1108108), contained in meson.dtsi, is overridden
> according to the value found in S805 SoC manual.
> This also required to switch to "amlogic,meson8b-dwmac" compatible
> to correctly configure that register.
> The two clock sources "clkin0" and "clkin1" are both equals
> to MPLL2 because, as reported in bit 9-7 register description,
> that is the only Meson8b ethernet clock source.
> 
> Signed-off-by: Emiliano Ingrassia <ingrassia@epigenesys.com>

Tested-by: Linus L?ssing <linus.luessing@c0d3.blue>

[PATCH v2 2/2] ARM: dts: meson8b-odroidc1: ethernet support

[Emiliano Ingrassia]

Hi Linus,

thanks for testing!

On Thu, Jan 25, 2018 at 03:18:12AM +0100, Linus L?ssing wrote:
> Hi Emiliano,
> 
> On Fri, Jan 19, 2018 at 02:49:17AM +0100, Emiliano Ingrassia wrote:
> > The Odroid-C1+ board is equipped with an RTL8211F ethernet PHY
> > which supports 10/100/1000 Mbps ethernet.
> > The PHY reset and interrupt lines are controlled by the SoC via
> > two GPIO lines (GPIOH_4 and GPIOH_3 respectively).
> > The PHY energy efficient ethernet (eee) mode is marked as broken
> > using "eee-broken-1000t" because, during tests, high packet losses
> > were experienced without it.
> > 
> > Signed-off-by: Emiliano Ingrassia <ingrassia@epigenesys.com>
> 
> I tested your patches on a 4.15-rc8 kernel with the following
> patches on top:
> 
> f120580deba4 ARM: dts: meson8b-odroidc1: ethernet support
> 22a6d87b9ee2 ARM: dts: meson8b: extend ethernet controller description
> 6d053e5f1f3b net: stmmac: dwmac-meson8b: propagate rate changes to the parent clock
> 8a5f3df5bcfa net: stmmac: dwmac-meson8b: fix setting the RGMII TX clock on Meson8b
> c045d6785ec7 net: stmmac: dwmac-meson8b: fix internal RGMII clock configuration
> 6b63adce0b60 net: stmmac: dwmac-meson8b: only configure the clocks in RGMII mode
> 9e8946eda815 clk: meson: mpll: use 64-bit maths in params_from_rate
> 
> And config file created via multiv7_defconfig.
> 
> I tested against a laptop with an Intel Core2Duo and an Intel
> 82567LM Gigabit network card.
> 
> These are the results I get with iperf3, running for 120s for each
> test:
> 
> # Direct Gigabit connection between Odroid C1+ and the laptop:
> 
> Odroid C1+ -> Laptop: 646MBit/s
> Laptop -> Odroid C1+: 239MBit/s
> 
> # 100Mbit forced via 'ethtool advertise 0x008' on laptop:
> 
> Odroid C1+ -> Laptop: 84.6MBit/s
> Laptop -> Odroid C1+: 52.7MBit/s
> 
> # Connection with a Gigabit switch in between:
> 
> Odroid C1+ -> GBit-SW -> Laptop: 626MBit/s
> Laptop -> GBit-SW -> Odroid C1+: 248MBit/s
> 
> # Connection with a 100MBit switch in between:
> 
> Odroid C1+ -> 100MBit-SW -> Laptop: 91.7MBit/s
> Laptop -> 100MBit-SW -> Odroid C1+: 43.7MBit/s
> 
> 
> Not quite sure why RX is somehow slower than TX on the C1+.
> But other than that looks great :-). Many thanks to
> everyone who had contributed!
>
> Tested-by: Linus L?ssing <linus.luessing@c0d3.blue>

I tested ethernet performance, with the same patches applied
on top of 4.15-rc8 kernel, using the kernel packet generator
configured as follow:

# echo "add_device eth0" > /proc/net/pktgen/kpktgend_0
# echo "dst_min 1.0.0.1" > /proc/net/pktgen/eth0
# echo "dst_max 254.255.255.254" > /proc/net/pktgen/eth0
# echo "src_max 254.255.255.254" > /proc/net/pktgen/eth0
# echo "src_min 1.0.0.1" > /proc/net/pktgen/eth0
# echo "count 1000000000"  > /proc/net/pktgen/eth0
# echo "min_pkt_size 1500"  > /proc/net/pktgen/eth0
# echo "max_pkt_size 1500"  > /proc/net/pktgen/eth0
# echo "udp_src_min 1"  > /proc/net/pktgen/eth0
# echo "udp_src_max 65534"  > /proc/net/pktgen/eth0
# echo "src_mac <mac_src>"  > /proc/net/pktgen/eth0
# echo "dst_mac <mac_dst>"  > /proc/net/pktgen/eth0
# echo "flag TXSIZE_RND"  > /proc/net/pktgen/eth0
# echo "flag IPSRC_RND"  > /proc/net/pktgen/eth0
# echo "flag IPDST_RND"  > /proc/net/pktgen/eth0
# echo "flag UDPDST_RND"  > /proc/net/pktgen/eth0
# echo "flag UDPSRC_RND"  > /proc/net/pktgen/eth0
# echo start > /proc/net/pktgen/pgctrl

on a direct Gigabit connection between the board and a laptop
with gigabit ethernet interface.
The results were measured with the tool "nload".

Running the rx/tx tests separately I got:

Odroid C1+ -> Laptop: 941MBit/s
Laptop -> Odroid C1+: 934MBit/s

Testing in parallel (generator used on both sides):

Odroid C1+ -> Laptop: 245MBit/s (outgoing)
Laptop -> Odroid C1+: 455MBit/s (incoming)

with just one CPU fully loaded (for the packet generator) and about
67 MB of RAM in use (on the C1+).

On my board "ethtool eth0" reports:

Settings for eth0:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Supported pause frame use: Symmetric Receive-only
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Advertised pause frame use: No
        Advertised auto-negotiation: Yes
        Link partner advertised link modes:  10baseT/Half 10baseT/Full
                                             100baseT/Half 100baseT/Full
                                             1000baseT/Full
        Link partner advertised pause frame use: Symmetric
        Link partner advertised auto-negotiation: Yes
        Speed: 1000Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: ug
        Wake-on: d
        Current message level: 0x0000003f (63)
                               drv probe link timer ifdown ifup
        Link detected: yes

Also, "mii-tool eth0" reports:

eth0: negotiated 1000baseT-FD flow-control, link ok

So, apparently, we have a 1Gbit full-duplex connection while, from
the tests, it seems we have less than a half-duplex connection.
I can't explain why.

About the fact that Rx speed is about half the Tx speed, 
I think this is due to the different length of the FIFO queue inside
the MAC. The SoC S805 manual reports an Rx FIFO of 4KB and a Tx FIFO
of 2KB, with the latter half the former.

Regards,

Emiliano

[PATCH v2 2/2] ARM: dts: meson8b-odroidc1: ethernet support

[Martin Blumenstingl]

On Fri, Jan 19, 2018 at 2:49 AM, Emiliano Ingrassia
<ingrassia@epigenesys.com> wrote:
> The Odroid-C1+ board is equipped with an RTL8211F ethernet PHY
> which supports 10/100/1000 Mbps ethernet.
> The PHY reset and interrupt lines are controlled by the SoC via
> two GPIO lines (GPIOH_4 and GPIOH_3 respectively).
> The PHY energy efficient ethernet (eee) mode is marked as broken
> using "eee-broken-1000t" because, during tests, high packet losses
> were experienced without it.
>
> Signed-off-by: Emiliano Ingrassia <ingrassia@epigenesys.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>

> ---
>  arch/arm/boot/dts/meson8b-odroidc1.dts | 30 ++++++++++++++++++++++++++++++
>  1 file changed, 30 insertions(+)
>
> diff --git a/arch/arm/boot/dts/meson8b-odroidc1.dts b/arch/arm/boot/dts/meson8b-odroidc1.dts
> index 9ff6ca4e20d0..d5e83051bb54 100644
> --- a/arch/arm/boot/dts/meson8b-odroidc1.dts
> +++ b/arch/arm/boot/dts/meson8b-odroidc1.dts
> @@ -99,3 +99,33 @@
>  &usb1 {
>         status = "okay";
>  };
> +
> +&ethmac {
> +       status = "okay";
> +
> +       snps,reset-gpio = <&gpio GPIOH_4 GPIO_ACTIVE_HIGH>;
> +       snps,reset-active-low;
> +       snps,reset-delays-us = <0 10000 30000>;
> +
> +       pinctrl-0 = <&eth_rgmii_pins>;
> +       pinctrl-names = "default";
> +
> +       phy-mode = "rgmii";
> +       phy-handle = <&eth_phy>;
> +       amlogic,tx-delay-ns = <4>;
> +
> +       mdio {
> +               compatible = "snps,dwmac-mdio";
> +               #address-cells = <1>;
> +               #size-cells = <0>;
> +
> +               /* Realtek RTL8211F (0x001cc916) */
> +               eth_phy: ethernet-phy at 0 {
> +                       reg = <0>;
> +                       eee-broken-1000t;
> +                       interrupt-parent = <&gpio_intc>;
> +                       /* GPIOH_3 */
> +                       interrupts = <17 IRQ_TYPE_LEVEL_LOW>;
> +               };
> +       };
> +};
> --
> 2.15.1
>

[PATCH v2 1/2] ARM: dts: meson8b: extend ethernet controller description

[Martin Blumenstingl]

On Fri, Jan 19, 2018 at 2:48 AM, Emiliano Ingrassia
<ingrassia@epigenesys.com> wrote:
> Enable S805 (aka Meson8b) ethernet pin multiplexing and
> extend the controller description.
> The programmable ethernet (PRG_ETHERNET) register address
> value (0xc1108108), contained in meson.dtsi, is overridden
> according to the value found in S805 SoC manual.
> This also required to switch to "amlogic,meson8b-dwmac" compatible
> to correctly configure that register.
> The two clock sources "clkin0" and "clkin1" are both equals
> to MPLL2 because, as reported in bit 9-7 register description,
> that is the only Meson8b ethernet clock source.
>
> Signed-off-by: Emiliano Ingrassia <ingrassia@epigenesys.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>

> ---
>  arch/arm/boot/dts/meson8b.dtsi | 35 +++++++++++++++++++++++++++++++++--
>  1 file changed, 33 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/boot/dts/meson8b.dtsi b/arch/arm/boot/dts/meson8b.dtsi
> index d75e0ceda8bb..fa5274aa370b 100644
> --- a/arch/arm/boot/dts/meson8b.dtsi
> +++ b/arch/arm/boot/dts/meson8b.dtsi
> @@ -185,6 +185,27 @@
>                         #gpio-cells = <2>;
>                         gpio-ranges = <&pinctrl_cbus 0 0 130>;
>                 };
> +
> +               eth_rgmii_pins: eth-rgmii {
> +                       mux {
> +                               groups = "eth_tx_clk",
> +                                        "eth_tx_en",
> +                                        "eth_txd1_0",
> +                                        "eth_txd1_1",
> +                                        "eth_txd0_0",
> +                                        "eth_txd0_1",
> +                                        "eth_rx_clk",
> +                                        "eth_rx_dv",
> +                                        "eth_rxd1",
> +                                        "eth_rxd0",
> +                                        "eth_mdio_en",
> +                                        "eth_mdc",
> +                                        "eth_ref_clk",
> +                                        "eth_txd2",
> +                                        "eth_txd3";
> +                               function = "ethernet";
> +                       };
> +               };
>         };
>  };
>
> @@ -203,8 +224,18 @@
>  };
>
>  &ethmac {
> -       clocks = <&clkc CLKID_ETH>;
> -       clock-names = "stmmaceth";
> +       compatible = "amlogic,meson8b-dwmac", "snps,dwmac-3.70a", "snps,dwmac";
> +
> +       reg = <0xc9410000 0x10000
> +              0xc1108140 0x4>;
> +
> +       clocks = <&clkc CLKID_ETH>,
> +                <&clkc CLKID_MPLL2>,
> +                <&clkc CLKID_MPLL2>;
> +       clock-names = "stmmaceth", "clkin0", "clkin1";
> +
> +       resets = <&reset RESET_ETHERNET>;
> +       reset-names = "stmmaceth";
>  };
>
>  &gpio_intc {
> --
> 2.15.1
>

[PATCH v2 0/2] meson8b-odroidc1: ethernet support

[Kevin Hilman]

Emiliano Ingrassia <ingrassia@epigenesys.com> writes:

> This patchset, tested on an Odroid-C1+ board, enables ethernet support
> on Odroid-C1/C1+ boards, improving and extending the ethernet description
> in the relative device tree.
>
> In particular:
> - enables the Meson8b ethernet controller pin multiplexing;
> - fixes and extends the Meson8b ethernet controller description;
> - adds the Odroid-C1+ ethernet PHY description and enables the
>   ethernet controller.
>
> This patchset depends on patchset "dwmac-meson8b: clock fixes for Meson8b".

Series applied to v4.17/dt64, with tags from Martin and Linus,

Thanks,

Kevin