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

[Tiezhu Yang]

On 03/24/2020 03:49 PM, Jiaxun Yang wrote:
> ä 2020å3æ23æ GMT+08:00 äå10:59:12, Tiezhu Yang <yangtiezhu@xxxxxxxxxxx> åå:
> > 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?

No, I will modify the description.

> > 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.

Thanks for your suggestion.

> [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(-)