| Message ID | 20240619123111.2798142-1-csokas.bence@prolan.hu (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [resubmit,3] net: fec: Fix FEC_ECR_EN1588 being cleared on link-down | expand |
> -----Original Message----- > From: Csókás, Bence <csokas.bence@prolan.hu> > Sent: 2024年6月19日 20:31 > To: Frank Li <Frank.Li@freescale.com>; David S. Miller > <davem@davemloft.net>; imx@lists.linux.dev; netdev@vger.kernel.org; > linux-kernel@vger.kernel.org > Cc: Csókás, Bence <csokas.bence@prolan.hu>; Richard Cochran > <richardcochran@gmail.com>; Andrew Lunn <andrew@lunn.ch>; Wei Fang > <wei.fang@nxp.com>; Shenwei Wang <shenwei.wang@nxp.com>; Clark > Wang <xiaoning.wang@nxp.com>; Eric Dumazet <edumazet@google.com>; > Jakub Kicinski <kuba@kernel.org>; Paolo Abeni <pabeni@redhat.com> > Subject: [PATCH resubmit 3] net: fec: Fix FEC_ECR_EN1588 being cleared on > link-down > > FEC_ECR_EN1588 bit gets cleared after MAC reset in `fec_stop()`, which > makes all 1588 functionality shut down, and all the extended registers > disappear, on link-down, making the adapter fall back to compatibility "dumb > mode". However, some functionality needs to be retained (e.g. PPS) even > without link. > > Fixes: 6605b730c061 ("FEC: Add time stamping code and a PTP hardware > clock") > Cc: Richard Cochran <richardcochran@gmail.com> > Reviewed-by: Andrew Lunn <andrew@lunn.ch> > Link: > https://lore.ker/ > nel.org%2Fnetdev%2F5fa9fadc-a89d-467a-aae9-c65469ff5fe1%40lunn.ch%2F > &data=05%7C02%7Cwei.fang%40nxp.com%7C68af958c8a3545b457c408dc90 > 5c129b%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C6385439723 > 35606813%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV > 2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=GfV0Lj > 6k5RwRLUArRhbxaDoNpG6wLlZSQh9vNxuReZA%3D&reserved=0 > Signed-off-by: Csókás, Bence <csokas.bence@prolan.hu> > --- > drivers/net/ethernet/freescale/fec_main.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/drivers/net/ethernet/freescale/fec_main.c > b/drivers/net/ethernet/freescale/fec_main.c > index 881ece735dcf..fb19295529a2 100644 > --- a/drivers/net/ethernet/freescale/fec_main.c > +++ b/drivers/net/ethernet/freescale/fec_main.c > @@ -1361,6 +1361,12 @@ fec_stop(struct net_device *ndev) > writel(FEC_ECR_ETHEREN, fep->hwp + FEC_ECNTRL); > writel(rmii_mode, fep->hwp + FEC_R_CNTRL); > } > + > + if (fep->bufdesc_ex) { > + val = readl(fep->hwp + FEC_ECNTRL); > + val |= FEC_ECR_EN1588; > + writel(val, fep->hwp + FEC_ECNTRL); > + } > } > > static void > -- > 2.34.1 > Thank you! Reviewed-by: Wei Fang <wei.fang@nxp.com>
Hello: This patch was applied to netdev/net-next.git (main) by David S. Miller <davem@davemloft.net>: On Wed, 19 Jun 2024 14:31:11 +0200 you wrote: > FEC_ECR_EN1588 bit gets cleared after MAC reset in `fec_stop()`, which > makes all 1588 functionality shut down, and all the extended registers > disappear, on link-down, making the adapter fall back to compatibility > "dumb mode". However, some functionality needs to be retained (e.g. PPS) > even without link. > > Fixes: 6605b730c061 ("FEC: Add time stamping code and a PTP hardware clock") > Cc: Richard Cochran <richardcochran@gmail.com> > Reviewed-by: Andrew Lunn <andrew@lunn.ch> > Link: https://lore.kernel.org/netdev/5fa9fadc-a89d-467a-aae9-c65469ff5fe1@lunn.ch/ > Signed-off-by: Csókás, Bence <csokas.bence@prolan.hu> > > [...] Here is the summary with links: - [resubmit,3] net: fec: Fix FEC_ECR_EN1588 being cleared on link-down https://git.kernel.org/netdev/net-next/c/c32fe1986f27 You are awesome, thank you!
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index 881ece735dcf..fb19295529a2 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -1361,6 +1361,12 @@ fec_stop(struct net_device *ndev) writel(FEC_ECR_ETHEREN, fep->hwp + FEC_ECNTRL); writel(rmii_mode, fep->hwp + FEC_R_CNTRL); } + + if (fep->bufdesc_ex) { + val = readl(fep->hwp + FEC_ECNTRL); + val |= FEC_ECR_EN1588; + writel(val, fep->hwp + FEC_ECNTRL); + } } static void
FEC_ECR_EN1588 bit gets cleared after MAC reset in `fec_stop()`, which makes all 1588 functionality shut down, and all the extended registers disappear, on link-down, making the adapter fall back to compatibility "dumb mode". However, some functionality needs to be retained (e.g. PPS) even without link. Fixes: 6605b730c061 ("FEC: Add time stamping code and a PTP hardware clock") Cc: Richard Cochran <richardcochran@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Link: https://lore.kernel.org/netdev/5fa9fadc-a89d-467a-aae9-c65469ff5fe1@lunn.ch/ Signed-off-by: Csókás, Bence <csokas.bence@prolan.hu> --- drivers/net/ethernet/freescale/fec_main.c | 6 ++++++ 1 file changed, 6 insertions(+)