netdev - Re: [PATCH v2 07/10] net: stmmac: dwmac-loongson: Add LS7A support

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Date: Fri, 28 Jul 2023 09:59:53 +0800
From: Feiyang Chen <chris.chenfeiyang@...il.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: Feiyang Chen <chenfeiyang@...ngson.cn>, hkallweit1@...il.com, peppe.cavallaro@...com, 
	alexandre.torgue@...s.st.com, joabreu@...opsys.com, chenhuacai@...ngson.cn, 
	linux@...linux.org.uk, dongbiao@...ngson.cn, 
	loongson-kernel@...ts.loongnix.cn, netdev@...r.kernel.org, 
	loongarch@...ts.linux.dev
Subject: Re: [PATCH v2 07/10] net: stmmac: dwmac-loongson: Add LS7A support

On Thu, Jul 27, 2023 at 5:18 PM Andrew Lunn <andrew@...n.ch> wrote:
>
> > +static void common_default_data(struct pci_dev *pdev,
> > +                             struct plat_stmmacenet_data *plat)
> >  {
> > +     plat->bus_id = (pci_domain_nr(pdev->bus) << 16) | PCI_DEVID(pdev->bus->number, pdev->devfn);
> > +
> >       plat->clk_csr = 2;      /* clk_csr_i = 20-35MHz & MDC = clk_csr_i/16 */
> >       plat->has_gmac = 1;
> >       plat->force_sf_dma_mode = 1;
> >
> >       /* Set default value for multicast hash bins */
> > -     plat->multicast_filter_bins = HASH_TABLE_SIZE;
> > +     plat->multicast_filter_bins = 256;
>
> HASH_TABLE_SIZE is 64. You appear to be changing it to 256 for
> everybody, not just your platform. I would expect something like
> common_default_data() is called first, and then you change values in a
> loongson specific function.
>

Hi, Andrew,

The common_default_data() here is defined in our platform driver. We
have tested on our platforms (LS7A and LS2K) and it can be safely
changed to 256.

Thanks,
Feiyang

>          Andrew