On 10/8/19, 9:37 PM, "Benjamin Herrenschmidt" <b...@kernel.crashing.org> wrote:
On Wed, 2019-09-11 at 14:48 +0000, Joel Stanley wrote: > Hi Ben, > > On Tue, 10 Sep 2019 at 22:05, Florian Fainelli <f.faine...@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 <vijaykhe...@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? Any news on this ? AST2400 has no HW checksum logic in HW, AST2500 should work for IPV4 fine, we should only selectively disable it for IPV6. Ben, I have already sent v2 for this with requested change which only disable for IPV6 in AST2500. I can send it again. Can you do an updated patch ? Cheers, Ben.