Re: Q: force netif ON even when there is no real link ?
> By saying "mac driver", I mean Ethernet driver with fixed phy. The fixed-phy implements the usual PHY API. So the MAC driver just sees a PHY which has a fixed speed, and is up. Andrew
Re: Q: force netif ON even when there is no real link ?
On Fri, Apr 20, 2018 at 3:14 PM, Ran Shalit wrote: > On Fri, Apr 20, 2018 at 3:05 PM, Andrew Lunn wrote: >> On Fri, Apr 20, 2018 at 03:01:09PM +0300, Ran Shalit wrote: >>> On Fri, Apr 20, 2018 at 2:55 PM, Andrew Lunn wrote: >>> > On Fri, Apr 20, 2018 at 11:44:14AM +0300, Ran Shalit wrote: >>> >> Hello, >>> >> >>> >> We configure external switch in u-boot. >>> >> The configuration is through mdio (cpu is mac and switch is phy). >>> >> >>> >> But in Linux we rather not implement any communication in mdio to >>> >> switch, but it means that we then don't have the information of link >>> >> state. >>> >> >>> >> Is it possible to force in Linux (by default in startup) Ethernet >>> >> connectivity (netif_carrier_on, netif_wake_queue) even if there is no >>> >> information of real link state ? >>> > >>> > Hi Ran >>> > >>> > Use a fixed-phy. >>> > >>> >>> Hi Andrew, >>> >>> I'll check about fixed phy, >>> but in general, is it a problem to have always netif_carrier_on, even >>> when there is no link ? >> >> The link between the CPU and the switch should be up all the >> time. That is the point of fixed-link. >> > > I understand. > But what about the mac driver, does it just do netif_start_queue ? > By saying "mac driver", I mean Ethernet driver with fixed phy. Regards, Ranran > Thanks > > >> Andrew
Re: Q: force netif ON even when there is no real link ?
On Fri, Apr 20, 2018 at 3:05 PM, Andrew Lunn wrote: > On Fri, Apr 20, 2018 at 03:01:09PM +0300, Ran Shalit wrote: >> On Fri, Apr 20, 2018 at 2:55 PM, Andrew Lunn wrote: >> > On Fri, Apr 20, 2018 at 11:44:14AM +0300, Ran Shalit wrote: >> >> Hello, >> >> >> >> We configure external switch in u-boot. >> >> The configuration is through mdio (cpu is mac and switch is phy). >> >> >> >> But in Linux we rather not implement any communication in mdio to >> >> switch, but it means that we then don't have the information of link >> >> state. >> >> >> >> Is it possible to force in Linux (by default in startup) Ethernet >> >> connectivity (netif_carrier_on, netif_wake_queue) even if there is no >> >> information of real link state ? >> > >> > Hi Ran >> > >> > Use a fixed-phy. >> > >> >> Hi Andrew, >> >> I'll check about fixed phy, >> but in general, is it a problem to have always netif_carrier_on, even >> when there is no link ? > > The link between the CPU and the switch should be up all the > time. That is the point of fixed-link. > I understand. But what about the mac driver, does it just do netif_start_queue ? Thanks > Andrew
Re: Q: force netif ON even when there is no real link ?
On Fri, Apr 20, 2018 at 03:01:09PM +0300, Ran Shalit wrote: > On Fri, Apr 20, 2018 at 2:55 PM, Andrew Lunn wrote: > > On Fri, Apr 20, 2018 at 11:44:14AM +0300, Ran Shalit wrote: > >> Hello, > >> > >> We configure external switch in u-boot. > >> The configuration is through mdio (cpu is mac and switch is phy). > >> > >> But in Linux we rather not implement any communication in mdio to > >> switch, but it means that we then don't have the information of link > >> state. > >> > >> Is it possible to force in Linux (by default in startup) Ethernet > >> connectivity (netif_carrier_on, netif_wake_queue) even if there is no > >> information of real link state ? > > > > Hi Ran > > > > Use a fixed-phy. > > > > Hi Andrew, > > I'll check about fixed phy, > but in general, is it a problem to have always netif_carrier_on, even > when there is no link ? The link between the CPU and the switch should be up all the time. That is the point of fixed-link. Andrew
Re: Q: force netif ON even when there is no real link ?
On Fri, Apr 20, 2018 at 2:55 PM, Andrew Lunn wrote: > On Fri, Apr 20, 2018 at 11:44:14AM +0300, Ran Shalit wrote: >> Hello, >> >> We configure external switch in u-boot. >> The configuration is through mdio (cpu is mac and switch is phy). >> >> But in Linux we rather not implement any communication in mdio to >> switch, but it means that we then don't have the information of link >> state. >> >> Is it possible to force in Linux (by default in startup) Ethernet >> connectivity (netif_carrier_on, netif_wake_queue) even if there is no >> information of real link state ? > > Hi Ran > > Use a fixed-phy. > Hi Andrew, I'll check about fixed phy, but in general, is it a problem to have always netif_carrier_on, even when there is no link ? Thank you, ranran
Re: Q: force netif ON even when there is no real link ?
On Fri, Apr 20, 2018 at 11:44:14AM +0300, Ran Shalit wrote: > Hello, > > We configure external switch in u-boot. > The configuration is through mdio (cpu is mac and switch is phy). > > But in Linux we rather not implement any communication in mdio to > switch, but it means that we then don't have the information of link > state. > > Is it possible to force in Linux (by default in startup) Ethernet > connectivity (netif_carrier_on, netif_wake_queue) even if there is no > information of real link state ? Hi Ran Use a fixed-phy. Andrew
