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Merge r207585 from cas(4):

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- Don't probe for PHYs if we already know to use a SERDES. Unlike as with
  cas(4) this only serves to speed up the the device attach though and can
  only be determined via the OFW device tree but not from the VPD.
- Don't touch the MIF when using a SERDES.
- Add some missing bus space barriers, mainly in the PCS code path.
This commit is contained in:
Marius Strobl 2010-09-16 09:29:48 +00:00
parent 6a5ffa0630
commit 65f2c0ff58
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=212725
4 changed files with 54 additions and 7 deletions
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36
sys/dev/gem/if_gem.c
View File

@ -268,10 +268,17 @@ gem_attach(struct gem_softc *sc)
sc->sc_rxsoft[i].rxs_mbuf = NULL;
}
/* Bypass probing PHYs if we already know for sure to use a SERDES. */
if ((sc->sc_flags & GEM_SERDES) != 0)
goto serdes;
/* Bad things will happen when touching this register on ERI. */
if (sc->sc_variant != GEM_SUN_ERI)
if (sc->sc_variant != GEM_SUN_ERI) {
GEM_BANK1_WRITE_4(sc, GEM_MII_DATAPATH_MODE,
GEM_MII_DATAPATH_MII);
GEM_BANK1_BARRIER(sc, GEM_MII_DATAPATH_MODE, 4,
BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE);
}
gem_mifinit(sc);
@ -283,6 +290,8 @@ gem_attach(struct gem_softc *sc)
if ((v & GEM_MIF_CONFIG_MDI1) != 0) {
v |= GEM_MIF_CONFIG_PHY_SEL;
GEM_BANK1_WRITE_4(sc, GEM_MIF_CONFIG, v);
GEM_BANK1_BARRIER(sc, GEM_MIF_CONFIG, 4,
BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE);
switch (sc->sc_variant) {
case GEM_SUN_ERI:
sc->sc_phyad = GEM_PHYAD_EXTERNAL;
@ -304,6 +313,8 @@ gem_attach(struct gem_softc *sc)
((v & GEM_MIF_CONFIG_MDI0) != 0 || GEM_IS_APPLE(sc))) {
v &= ~GEM_MIF_CONFIG_PHY_SEL;
GEM_BANK1_WRITE_4(sc, GEM_MIF_CONFIG, v);
GEM_BANK1_BARRIER(sc, GEM_MIF_CONFIG, 4,
BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE);
switch (sc->sc_variant) {
case GEM_SUN_ERI:
case GEM_APPLE_K2_GMAC:
@ -324,17 +335,23 @@ gem_attach(struct gem_softc *sc)
* Try the external PCS SERDES if we didn't find any PHYs.
*/
if (error != 0 && sc->sc_variant == GEM_SUN_GEM) {
serdes:
GEM_BANK1_WRITE_4(sc, GEM_MII_DATAPATH_MODE,
GEM_MII_DATAPATH_SERDES);
GEM_BANK1_BARRIER(sc, GEM_MII_DATAPATH_MODE, 4,
BUS_SPACE_BARRIER_WRITE);
GEM_BANK1_WRITE_4(sc, GEM_MII_SLINK_CONTROL,
GEM_MII_SLINK_LOOPBACK | GEM_MII_SLINK_EN_SYNC_D);
GEM_BANK1_BARRIER(sc, GEM_MII_SLINK_CONTROL, 4,
BUS_SPACE_BARRIER_WRITE);
GEM_BANK1_WRITE_4(sc, GEM_MII_CONFIG, GEM_MII_CONFIG_ENABLE);
GEM_BANK1_BARRIER(sc, GEM_MII_CONFIG, 4,
BUS_SPACE_BARRIER_WRITE);
sc->sc_flags |= GEM_SERDES;
sc->sc_phyad = GEM_PHYAD_EXTERNAL;
error = mii_phy_probe(sc->sc_dev, &sc->sc_miibus,
gem_mediachange, gem_mediastatus);
}
if (error != 0) {
device_printf(sc->sc_dev, "PHY probe failed: %d\n", error);
goto fail_rxd;
@ -918,8 +935,9 @@ gem_init_locked(struct gem_softc *sc)
__func__);
#endif
/* Re-initialize the MIF. */
gem_mifinit(sc);
if ((sc->sc_flags & GEM_SERDES) == 0)
/* Re-initialize the MIF. */
gem_mifinit(sc);
/* step 3. Setup data structures in host memory. */
if (gem_meminit(sc) != 0)
@ -1800,6 +1818,8 @@ gem_mifinit(struct gem_softc *sc)
/* Configure the MIF in frame mode. */
GEM_BANK1_WRITE_4(sc, GEM_MIF_CONFIG,
GEM_BANK1_READ_4(sc, GEM_MIF_CONFIG) & ~GEM_MIF_CONFIG_BB_ENA);
GEM_BANK1_BARRIER(sc, GEM_MIF_CONFIG, 4,
BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE);
}
/*
@ -1914,10 +1934,16 @@ gem_mii_writereg(device_t dev, int phy, int reg, int val)
GEM_BANK1_BARRIER(sc, GEM_MII_CONFIG, 4,
BUS_SPACE_BARRIER_WRITE);
GEM_BANK1_WRITE_4(sc, GEM_MII_ANAR, val);
GEM_BANK1_BARRIER(sc, GEM_MII_ANAR, 4,
BUS_SPACE_BARRIER_WRITE);
GEM_BANK1_WRITE_4(sc, GEM_MII_SLINK_CONTROL,
GEM_MII_SLINK_LOOPBACK | GEM_MII_SLINK_EN_SYNC_D);
GEM_BANK1_BARRIER(sc, GEM_MII_SLINK_CONTROL, 4,
BUS_SPACE_BARRIER_WRITE);
GEM_BANK1_WRITE_4(sc, GEM_MII_CONFIG,
GEM_MII_CONFIG_ENABLE);
GEM_BANK1_BARRIER(sc, GEM_MII_CONFIG, 4,
BUS_SPACE_BARRIER_WRITE);
return (0);
case MII_ANLPAR:
reg = GEM_MII_ANLPAR;
@ -1928,6 +1954,8 @@ gem_mii_writereg(device_t dev, int phy, int reg, int val)
return (0);
}
GEM_BANK1_WRITE_4(sc, reg, val);
GEM_BANK1_BARRIER(sc, reg, 4,
BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE);
return (0);
}

14
sys/dev/gem/if_gem_pci.c
View File

@ -52,6 +52,7 @@ __FBSDID("$FreeBSD$");
#include <machine/bus.h>
#if defined(__powerpc__) || defined(__sparc64__)
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/openfirm.h>
#include <machine/ofw_machdep.h>
#endif
@ -140,12 +141,17 @@ static struct resource_spec gem_pci_res_spec[] = {
{ -1, 0 }
};
#define GEM_SHARED_PINS "shared-pins"
#define GEM_SHARED_PINS_SERDES "serdes"
static int
gem_pci_attach(device_t dev)
{
struct gem_softc *sc;
int i;
#if !(defined(__powerpc__) || defined(__sparc64__))
#if defined(__powerpc__) || defined(__sparc64__)
char buf[sizeof(GEM_SHARED_PINS)];
#else
int j;
#endif
@ -207,6 +213,12 @@ gem_pci_attach(device_t dev)
#if defined(__powerpc__) || defined(__sparc64__)
OF_getetheraddr(dev, sc->sc_enaddr);
if (OF_getprop(ofw_bus_get_node(dev), GEM_SHARED_PINS, buf,
sizeof(buf)) > 0) {
buf[sizeof(buf) - 1] = '\0';
if (strcmp(buf, GEM_SHARED_PINS_SERDES) == 0)
sc->sc_flags |= GEM_SERDES;
}
#else
/*
* Dig out VPD (vital product data) and read NA (network address).

2
sys/dev/gem/if_gem_sbus.c
View File

@ -131,6 +131,8 @@ gem_sbus_attach(device_t dev)
sc = device_get_softc(dev);
sc->sc_variant = GEM_SUN_GEM;
sc->sc_dev = dev;
/* All known SBus models use a SERDES. */
sc->sc_flags = GEM_SERDES;
if (bus_alloc_resources(dev, gem_sbus_res_spec, sc->sc_res)) {
device_printf(dev, "failed to allocate resources\n");

9
sys/modules/gem/Makefile
View File

@ -3,10 +3,15 @@
.PATH: ${.CURDIR}/../../dev/gem
KMOD= if_gem
SRCS= bus_if.h device_if.h if_gem.c if_gem_pci.c miibus_if.h pci_if.h
SRCS= bus_if.h device_if.h if_gem.c if_gem_pci.c ${if_gem_sbus} miibus_if.h
SRCS+= ${ofw_bus_if} pci_if.h
.if ${MACHINE} == "sparc64"
SRCS+= if_gem_sbus.c ofw_bus_if.h
if_gem_sbus= if_gem_sbus.c
.endif
.if ${MACHINE_CPUARCH} == "powerpc" || ${MACHINE_CPUARCH} == "sparc64"
ofw_bus_if= ofw_bus_if.h
.endif
.include <bsd.kmod.mk>