From: "Jernej Škrabec" <jernej.skrabec@gmail.com>
To: Guo Ren <guoren@kernel.org>, Arnd Bergmann <arnd@arndb.de>
Cc: Anup Patel <anup.patel@wdc.com>,
Palmer Dabbelt <palmerdabbelt@google.com>,
Chen-Yu Tsai <wens@csie.org>, Maxime Ripard <maxime@cerno.tech>,
Drew Fustini <drew@beagleboard.org>,
liush@allwinnertech.com, lazyparser@gmail.com, wefu@redhat.com,
linux-riscv <linux-riscv@lists.infradead.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-arch <linux-arch@vger.kernel.org>,
linux-sunxi@lists.linux.dev, Maxime Ripard <mripard@kernel.org>,
Corentin Labbe <clabbe@baylibre.com>,
Samuel Holland <samuel@sholland.org>,
Icenowy Zheng <icenowy@aosc.io>,
LABBE Corentin <clabbe.montjoie@gmail.com>,
Michael Walle <michael@walle.cc>,
Guo Ren <guoren@linux.alibaba.com>
Subject: Re: [RFC PATCH v2 11/11] riscv: soc: Allwinner D1 GMAC driver only for temp use
Date: Sun, 06 Jun 2021 18:32:51 +0200 [thread overview]
Message-ID: <811499816.OAcyhOWOk8@jernej-laptop> (raw)
In-Reply-To: <CAK8P3a0yHEGH8=o_TQ+ajRn53j+mHxYxqyYLPXnUe=YWkTHDBw@mail.gmail.com>
Dne nedelja, 06. junij 2021 ob 18:16:44 CEST je Arnd Bergmann napisal(a):
> On Sun, Jun 6, 2021 at 11:04 AM <guoren@kernel.org> wrote:
> > diff --git a/arch/riscv/boot/dts/allwinner/allwinner-d1-nezha-kit.dts
> > b/arch/riscv/boot/dts/allwinner/allwinner-d1-nezha-kit.dts index
> > cd9f7c9..31b681d 100644
> > --- a/arch/riscv/boot/dts/allwinner/allwinner-d1-nezha-kit.dts
> > +++ b/arch/riscv/boot/dts/allwinner/allwinner-d1-nezha-kit.dts
> > @@ -11,7 +11,7 @@
> >
> > compatible = "allwinner,d1-nezha-kit";
> >
> > chosen {
> >
> > - bootargs = "console=ttyS0,115200";
> > + bootargs = "console=ttyS0,115200 rootwait init=/sbin/init
> > root=/dev/nfs rw nfsroot=192.168.101.200:/tmp/rootfs_nfs,v3,tcp,nolock
> > ip=192.168.101.23";
> These are not board specific options, they should be set by the bootloader
> according to the network environment. It clearly doens't belong
> into this patch .
>
> > stdout-path = &serial0;
> >
> > };
> >
> > diff --git a/arch/riscv/boot/dts/allwinner/allwinner-d1.dtsi
> > b/arch/riscv/boot/dts/allwinner/allwinner-d1.dtsi index 11cd938..d317e19
> > 100644
> > --- a/arch/riscv/boot/dts/allwinner/allwinner-d1.dtsi
> > +++ b/arch/riscv/boot/dts/allwinner/allwinner-d1.dtsi
> > @@ -80,5 +80,21 @@
> >
> > clocks = <&dummy_apb>;
> > status = "disabled";
> >
> > };
> >
> > +
> > + eth@4500000 {
> > + compatible = "allwinner,sunxi-gmac";
> > + reg = <0x00 0x4500000 0x00 0x10000 0x00 0x3000030
> > 0x00 0x04>; + interrupts-extended = <&plic 0x3e
> > 0x04>;
> > + interrupt-names = "gmacirq";
> > + device_type = "gmac0";
> > + phy-mode = "rgmii";
> > + use_ephy25m = <0x01>;
> > + tx-delay = <0x03>;
> > + rx-delay = <0x03>;
> > + gmac-power0;
> > + gmac-power1;
> > + gmac-power2;
> > + status = "okay";
> > + };
>
> Before you add this in the dts file, the properties need to be documented in
> the binding file. The "allwinner,sunxi-gmac" identifier does not appear to
> be specific enough here, and the properties don't match what dwmac uses,
> which would make it unnecessarily hard to change to the other driver later
> on without breaking compatibility to old dtb files.
>
> > +++ b/drivers/net/ethernet/allwinnertmp/sunxi-gmac-ops.c
> > @@ -0,0 +1,690 @@
> > +/*
> > + * linux/drivers/net/ethernet/allwinner/sunxi_gmac_ops.c
> > + *
> > + * Copyright © 2016-2018, fuzhaoke
> > + * Author: fuzhaoke <fuzhaoke@allwinnertech.com>
> > + *
> > + * This file is provided under a dual BSD/GPL license. When using or
> > + * redistributing this file, you may do so under either license.
>
> Are you sure this is the correct copyright information and "fuzhaoke" is
> the copyright holder for this file? If this is derived from either the
> designware
> code or the Linux stmmac driver, the authors should be mentioned,
> and the license be compatible with the original license terms.
>
> Andre already commented on the driver quality and code duplication, those
> are also show-stoppers, but the unclear license terms and dt binding
> compatibility are even stronger reasons to not get anywhere close to this
> driver.
I got impression that this patch is not meant to be merged and it's forward
ported from vendor kernel as a stop gap measure for developers until proper
mainline ethernet driver is developed.
Best regards,
Jernej
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next prev parent reply other threads:[~2021-06-06 16:34 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-06 9:03 [RFC PATCH v2 00/11] riscv: Add DMA_COHERENT support for Allwinner D1 guoren
2021-06-06 9:03 ` [RFC PATCH v2 01/11] riscv: asid: Use global mappings for kernel pages guoren
2021-06-06 9:03 ` [PATCH V5 1/3] riscv: " guoren
2021-06-06 9:03 ` [PATCH V5 2/3] riscv: Add ASID-based tlbflushing methods guoren
2021-06-06 14:38 ` Christoph Hellwig
2021-06-06 9:03 ` [RFC PATCH v2 02/11] riscv: asid: " guoren
2021-06-06 9:04 ` [RFC PATCH v2 03/11] riscv: asid: Optimize tlbflush coding convention guoren
2021-06-06 9:04 ` [PATCH V5 3/3] riscv: tlbflush: Optimize " guoren
2021-06-06 9:04 ` [RFC PATCH v2 04/11] riscv: pgtable: Fixup _PAGE_CHG_MASK usage guoren
2021-06-06 9:04 ` [RFC PATCH v2 05/11] riscv: pgtable: Add custom protection_map init guoren
2021-06-06 9:04 ` [RFC PATCH v2 06/11] riscv: pgtable: Add DMA_COHERENT with custom PTE attributes guoren
2021-06-06 14:39 ` Christoph Hellwig
2021-06-06 15:08 ` Guo Ren
2021-06-06 17:22 ` Nick Kossifidis
2021-06-07 6:19 ` Christoph Hellwig
2021-06-06 9:04 ` [RFC PATCH v2 07/11] riscv: cmo: Add dma-noncoherency support guoren
2021-10-17 9:28 ` twd2
2021-10-20 8:11 ` Guo Ren
2021-06-06 9:04 ` [RFC PATCH v2 08/11] riscv: cmo: Add vendor custom icache sync guoren
2021-06-06 9:04 ` [RFC PATCH v2 09/11] riscv: soc: Initial DTS for Allwinner D1 NeZha board guoren
2021-06-06 16:26 ` Jernej Škrabec
2021-06-06 17:05 ` Guo Ren
2021-06-07 3:44 ` Guo Ren
2021-06-07 7:27 ` Maxime Ripard
2021-06-07 7:53 ` Guo Ren
2021-06-07 7:24 ` Maxime Ripard
2021-06-07 8:07 ` Guo Ren
2021-06-14 15:33 ` Maxime Ripard
2021-06-14 16:28 ` Guo Ren
2021-06-14 16:31 ` Jernej Škrabec
2021-06-06 9:04 ` [RFC PATCH v2 10/11] riscv: soc: Add Allwinner SoC kconfig option guoren
2021-06-07 7:19 ` Maxime Ripard
2021-06-07 7:27 ` Arnd Bergmann
2021-06-07 7:45 ` Guo Ren
2021-06-07 7:43 ` Guo Ren
2021-06-07 12:12 ` Maxime Ripard
2021-06-07 12:39 ` Guo Ren
2021-06-06 9:04 ` [RFC PATCH v2 11/11] riscv: soc: Allwinner D1 GMAC driver only for temp use guoren
2021-06-06 10:50 ` Andre Przywara
2021-06-06 15:32 ` Guo Ren
2021-06-06 15:39 ` Jernej Škrabec
2021-06-06 15:41 ` Guo Ren
2021-06-06 16:16 ` Arnd Bergmann
2021-06-06 16:32 ` Jernej Škrabec [this message]
2021-06-06 16:53 ` Guo Ren
2021-06-06 16:53 ` Guo Ren
2021-06-06 16:29 ` [RFC PATCH v2 00/11] riscv: Add DMA_COHERENT support for Allwinner D1 Jernej Škrabec
2021-06-06 16:54 ` Guo Ren
2021-06-06 17:14 ` Jernej Škrabec
2021-06-06 23:42 ` Guo Ren
2021-06-07 3:44 ` Anup Patel
2021-06-07 4:36 ` Guo Ren
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