linux-kernel - Re: [PATCH v2 0/3] Add basic support for Loongson 7A1000 bridge chip

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Date:   Tue, 24 Mar 2020 15:49:50 +0800
From:   Jiaxun Yang <jiaxun.yang@...goat.com>
To:     Tiezhu Yang <yangtiezhu@...ngson.cn>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Huacai Chen <chenhc@...ote.com>
CC:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        Xuefeng Li <lixuefeng@...ngson.cn>
Subject: Re: [PATCH v2 0/3] Add basic support for Loongson 7A1000 bridge chip



于 2020年3月23日 GMT+08:00 上午10:59:12, Tiezhu Yang <yangtiezhu@...ngson.cn> 写到:
>The Loongson 7A1000 bridge chip has been released for several years
>since the second half of 2017, but it is not supported by the Linux
>mainline kernel while it only works well with the Loongson internal
>kernel version. When I update the latest version of Linux mainline
>kernel on the Loongson 3A3000 CPU and 7A1000 bridge chip system,
>the boot process failed and I feel depressed.
>
>The 7A1000 bridge chip is used a lot with 3A3000 or 3A4000 CPU in
>the most Loongson desktop and sever products, it is important to
>support Loongson 7A1000 bridge chip by the Linux mainline kernel.
>
>This patch series adds the basic support for the Loongson 7A1000
>bridge chip, when apply these patches based on linux-5.6-rc7, the
>boot process is successful and we can login normally used with the

Is it still true without IRQ driver?

>latest firmware and discrete graphics card, the next work to do is
>power management and some other controller device drivers.
>
>Additionally, when I git clone mips code [1], the speed is too slow
>and clone always failed, so this patch series is based on the latest
>linux-5.6-rc7 [2].

You can clone stable tree from mirrors in China[1] at first,
then add mips tree as a remote and fetch from it.
In this way it will only download a minimal difference set from foreign server so won't spend a lot of time.


[1]: https://mirrors.tuna.tsinghua.edu.cn/git/linux-stable.git

>
>If you have any questions and suggestions, please let me know.
>
>Thanks,
>
>Tiezhu Yang
>
>v2:
>  - The split patch series about Loongson vendor ID and SATA controller
>    has been merged into the linux-block.git by Jens Axboe [3].
>
>  - Think about using hierarchy IRQ domain in the patch of interrupt
>    controller, and this maybe depend on the patch series by Jiaxun
>    ("Modernize Loongson64 Machine"), so the patch about interrupt is
>    not included in this v2 patch series.
>
>[1] git clone
>https://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.git
>[2] git clone https://github.com/torvalds/linux.git
>[3]
>https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=for-next&id=9acb9fe18d86
>https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=for-next&id=e49bd683e00b
>
>Tiezhu Yang (3):
>  MIPS: Loongson: Get host bridge information
>  MIPS: Loongson: Add DMA support for 7A1000
>  MIPS: Loongson: Add PCI support for 7A1000
>
> arch/mips/include/asm/mach-loongson64/boot_param.h | 20 ++++++
> arch/mips/loongson64/dma.c                         |  9 ++-
> arch/mips/loongson64/env.c                         | 20 ++++++
> arch/mips/loongson64/init.c                        | 17 +++++
>arch/mips/pci/ops-loongson3.c                      | 72
>++++++++++++++++++++--
> 5 files changed, 131 insertions(+), 7 deletions(-)

-- 
Jiaxun Yang