> Date: Sun, 10 Dec 2017 19:03:41 +0200
> From: Artturi Alm <artturi....@gmail.com>
>
> On Wed, Nov 29, 2017 at 11:45:51AM +0200, Artturi Alm wrote:
> > Hi,
> >
> >
> > there's more work to be done for fec, but this will allow changing
> > changing address/ifconfig up&down etc. without the freeze/kernel hangup
> > preventing ie. autoinstall i've reported to bugs@.
> >
> > i didn't see these while loops being done in nbsd if_enet, where i think
> > fec originates from.
> >
> > -Artturi
> >
>
> Ping? should I minimize the diff i sent earlier, or?
Does this fix any real problems? If not, just drop it.
> > diff --git a/sys/arch/armv7/imx/if_fec.c b/sys/arch/armv7/imx/if_fec.c
> > index 899c1904144..5b494a6c92c 100644
> > --- a/sys/arch/armv7/imx/if_fec.c
> > +++ b/sys/arch/armv7/imx/if_fec.c
> > @@ -181,6 +181,8 @@
> > #define ENET_TXD_INT (1 << 30)
> > #endif
> >
> > +#define ENET_MII_TIMEOUT 100000 /* --loop_cnt { delay(5); } */
> > +
> > /*
> > * Bus dma allocation structure used by
> > * fec_dma_malloc and fec_dma_free.
> > @@ -339,7 +341,6 @@ fec_attach(struct device *parent, struct device *self,
> > void *aux)
> >
> > /* reset the controller */
> > HSET4(sc, ENET_ECR, ENET_ECR_RESET);
> > - while(HREAD4(sc, ENET_ECR) & ENET_ECR_RESET);
> >
> > HWRITE4(sc, ENET_EIMR, 0);
> > HWRITE4(sc, ENET_EIR, 0xffffffff);
> > @@ -604,7 +605,6 @@ fec_init(struct fec_softc *sc)
> >
> > /* reset the controller */
> > HSET4(sc, ENET_ECR, ENET_ECR_RESET);
> > - while(HREAD4(sc, ENET_ECR) & ENET_ECR_RESET);
> >
> > /* set hw address */
> > HWRITE4(sc, ENET_PALR,
> > @@ -616,7 +616,8 @@ fec_init(struct fec_softc *sc)
> > (sc->sc_ac.ac_enaddr[4] << 24) |
> > (sc->sc_ac.ac_enaddr[5] << 16));
> >
> > - /* clear outstanding interrupts */
> > + /* mask and clear all interrupts */
> > + HWRITE4(sc, ENET_EIMR, 0);
> > HWRITE4(sc, ENET_EIR, 0xffffffff);
> >
> > /* set max receive buffer size, 3-0 bits always zero for alignment */
> > @@ -692,6 +693,8 @@ fec_stop(struct fec_softc *sc)
> > {
> > struct ifnet *ifp = &sc->sc_ac.ac_if;
> >
> > + HCLR4(sc, ENET_ECR, ENET_ECR_ETHEREN);
> > +
> > /*
> > * Mark the interface down and cancel the watchdog timer.
> > */
> > @@ -701,9 +704,7 @@ fec_stop(struct fec_softc *sc)
> >
> > timeout_del(&sc->sc_tick);
> >
> > - /* reset the controller */
> > - HSET4(sc, ENET_ECR, ENET_ECR_RESET);
> > - while(HREAD4(sc, ENET_ECR) & ENET_ECR_RESET);
> > + mii_down(&sc->sc_mii);
> > }
> >
> > void
> > @@ -996,6 +997,7 @@ fec_miibus_readreg(struct device *dev, int phy, int reg)
> > {
> > int r = 0;
> > struct fec_softc *sc = (struct fec_softc *)dev;
> > + u_int timo = ENET_MII_TIMEOUT;
> >
> > HSET4(sc, ENET_EIR, ENET_EIR_MII);
> >
> > @@ -1003,10 +1005,16 @@ fec_miibus_readreg(struct device *dev, int phy, int
> > reg)
> > ENET_MMFR_ST | ENET_MMFR_OP_RD | ENET_MMFR_TA |
> > phy << ENET_MMFR_PA_SHIFT | reg << ENET_MMFR_RA_SHIFT);
> >
> > - while(!(HREAD4(sc, ENET_EIR) & ENET_EIR_MII));
> > + while (!(HREAD4(sc, ENET_EIR) & ENET_EIR_MII) && --timo)
> > + delay(5);
> >
> > r = bus_space_read_4(sc->sc_iot, sc->sc_ioh, ENET_MMFR);
> >
> > +#ifdef DIAGNOSTIC
> > + if (!timo)
> > + printf("%s: %s timeout\n", sc->sc_dev.dv_xname, __func__);
> > +#endif
> > +
> > return (r & 0xffff);
> > }
> >
> > @@ -1014,6 +1022,7 @@ void
> > fec_miibus_writereg(struct device *dev, int phy, int reg, int val)
> > {
> > struct fec_softc *sc = (struct fec_softc *)dev;
> > + u_int timo = ENET_MII_TIMEOUT;
> >
> > HSET4(sc, ENET_EIR, ENET_EIR_MII);
> >
> > @@ -1022,7 +1031,12 @@ fec_miibus_writereg(struct device *dev, int phy, int
> > reg, int val)
> > phy << ENET_MMFR_PA_SHIFT | reg << ENET_MMFR_RA_SHIFT |
> > (val & 0xffff));
> >
> > - while(!(HREAD4(sc, ENET_EIR) & ENET_EIR_MII));
> > + while (!(HREAD4(sc, ENET_EIR) & ENET_EIR_MII) && --timo)
> > + delay(5);
> > +#ifdef DIAGNOSTIC
> > + if (!timo)
> > + printf("%s: %s timeout\n", sc->sc_dev.dv_xname, __func__);
> > +#endif
> >
> > return;
> > }
>
>
