Re: [PATCH v2 1/2] soc: hisilicon: Support HCCS driver on Kunpeng SoC

[lihuisong (C)]

在 2023/5/23 21:41, Sudeep Holla 写道:
> On Tue, May 23, 2023 at 07:57:42PM +0800, lihuisong (C) wrote:
> > 在 2023/5/23 17:39, Sudeep Holla 写道:
> > > On Mon, May 22, 2023 at 03:22:10PM +0800, Huisong Li wrote:
> > > > The Huawei Cache-Coherent System (HCCS) is a bus protocol standard
> > > > for ensuring cache coherent on HiSilicon SoC. The performance of
> > > > the application may be affected if some hccs ports are in non-full
> > > > lane status, have a large number of CRC errors and so on.
> > > >
> > > > This driver provides the query interface of the health status and
> > > > port information of HCCS on Kunpeng SoC.
> > > >
> > > > Signed-off-by: Huisong Li <lihuisong@xxxxxxxxxx>
> > > > ---
> > > >    MAINTAINERS                          |    6 +
> > > >    drivers/soc/Kconfig                  |    1 +
> > > >    drivers/soc/Makefile                 |    1 +
> > > >    drivers/soc/hisilicon/Kconfig        |   19 +
> > > >    drivers/soc/hisilicon/Makefile       |    2 +
> > > >    drivers/soc/hisilicon/kunpeng_hccs.c | 1287 ++++++++++++++++++++++++++
> > > >    drivers/soc/hisilicon/kunpeng_hccs.h |  196 ++++
> > > >    7 files changed, 1512 insertions(+)
> > > >    create mode 100644 drivers/soc/hisilicon/Kconfig
> > > >    create mode 100644 drivers/soc/hisilicon/Makefile
> > > >    create mode 100644 drivers/soc/hisilicon/kunpeng_hccs.c
> > > >    create mode 100644 drivers/soc/hisilicon/kunpeng_hccs.h
> > > >
> > > > diff --git a/MAINTAINERS b/MAINTAINERS
> > > > index eddbc48c61e9..fe0e796e8445 100644
> > > > --- a/MAINTAINERS
> > > > +++ b/MAINTAINERS
> > > > @@ -9399,6 +9399,12 @@ S:	Maintained
> > > >    W:	http://www.hisilicon.com
> > > >    F:	drivers/spi/spi-hisi-sfc-v3xx.c
> > > > +HISILICON KUNPENG SOC HCCS DRIVER
> > > s/HCCS/HCCS INFO or QUERY/ ?
> >  From the current features, what you suggest is suitable.
> > But this driver will support to the setting feature.
> Ah OK, I wasn't aware of that, in that case it is fine to keep it as is
> and add comment about future feature expansions so that the name makes
It's not suitable to add it in advance.
> more sense them. I assumed it is more a query interface.
Yes, most of them are query interfaces.
> I also assume the settings with just control performance and is fully
> safe and stability of the system is taken care.
Yes, it will has an impact on performance and power consumption, but not 
functionality.
> [...]
>
> > > > +
> > > > +/* PCC defines */
> > > > +#define HCCS_PCC_SIGNATURE_MASK		0x50434300
> > > > +#define HCCS_PCC_STATUS_CMD_COMPLETE	BIT(0)
> > > I am not really sure if we keep duplicating this. I will try to cook up
> > > a patch consolidating these.
> > Yes, these info is better placed in a global header.
> > Do I need to do this in this series?
> > Or do not modify it, and then process all related code in your patch.
> Fair enough, we can do that later. I don't want to block this for that reason.
ok, thanks. will send v3 ASAP.
>