Messages in this thread Patch in this message | | | From | Vijay Khemka <> | Subject | Re: [PATCH] ftgmac100: Disable HW checksum generation on AST2500 | Date | Wed, 11 Sep 2019 17:44:05 +0000 |
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On 9/11/19, 7:49 AM, "Joel Stanley" <joel@jms.id.au> wrote:
Hi Ben,
On Tue, 10 Sep 2019 at 22:05, Florian Fainelli <f.fainelli@gmail.com> wrote: > > On 9/10/19 2:37 PM, Vijay Khemka wrote: > > HW checksum generation is not working for AST2500, specially with IPV6 > > over NCSI. All TCP packets with IPv6 get dropped. By disabling this > > it works perfectly fine with IPV6. > > > > Verified with IPV6 enabled and can do ssh. > > How about IPv4, do these packets have problem? If not, can you continue > advertising NETIF_F_IP_CSUM but take out NETIF_F_IPV6_CSUM? > > > > > Signed-off-by: Vijay Khemka <vijaykhemka@fb.com> > > --- > > drivers/net/ethernet/faraday/ftgmac100.c | 5 +++-- > > 1 file changed, 3 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c > > index 030fed65393e..591c9725002b 100644 > > --- a/drivers/net/ethernet/faraday/ftgmac100.c > > +++ b/drivers/net/ethernet/faraday/ftgmac100.c > > @@ -1839,8 +1839,9 @@ static int ftgmac100_probe(struct platform_device *pdev) > > if (priv->use_ncsi) > > netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER; > > > > - /* AST2400 doesn't have working HW checksum generation */ > > - if (np && (of_device_is_compatible(np, "aspeed,ast2400-mac"))) > > + /* AST2400 and AST2500 doesn't have working HW checksum generation */ > > + if (np && (of_device_is_compatible(np, "aspeed,ast2400-mac") || > > + of_device_is_compatible(np, "aspeed,ast2500-mac"))) Do you recall under what circumstances we need to disable hardware checksumming? Mainly, TCP packets over IPV6 getting dropped. After disabling it was working.
Cheers,
Joel
> > netdev->hw_features &= ~NETIF_F_HW_CSUM; > > if (np && of_get_property(np, "no-hw-checksum", NULL)) > > netdev->hw_features &= ~(NETIF_F_HW_CSUM | NETIF_F_RXCSUM); > > > > > -- > Florian
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