freebsd-dev/sys/dev/gem/if_gem_sbus.c
Marius Strobl 9ba2b298df - Initialize the ifnet structure, especially if_dname, before probing
the PHYs as some PHY drivers use it (but probably shouldn't). How
  gem(4) has worked with brgphy(4) on powerpc without this so far is
  unclear to me.
- Introduce a dying flag which is set during detach and checked in
  gem_ioctl() in order to prevent active BPF listeners to clear
  promiscuous mode which may lead to the tick callout being restarted
  which will trigger a panic once it's actually gone.
- In gem_stop() reset rather than just disable the transmitter and
  receiver in order to ensure we're not unloading DMA maps still in
  use by the hardware. [1]
- The blanking time is specified in PCI clocks so we should use twice
  the value when operating at 66MHz.
- Spell some 2 as ETHER_ALIGN and a 19 as GEM_STATUS_TX_COMPLETION_SHFT
  to make the actual intentions clear.
- As we don't unload the peak attempts counter ignore its overflow
  interrupts.
- Remove a stale setting of a variable to GEM_TD_INTERRUPT_ME which
  isn't used afterwards.
- For optimum performance increment the TX kick register in multiples
  of 4 if possible as suggested by the documentation.
- Partially revert r164931; drivers should only clear the watchdog
  timer if all outstanding TX descriptors are done.
- Fix some debugging strings.
- Add a missing BUS_DMASYNC_POSTWRITE in gem_rint().
- As the error paths in the interrupt handler are generally unlikely
  predict them as false.
- Add support for the SBus version of the GEM controller. [2]
- Add some lock assertions.
- Improve some comments.
- Fix some more or less cosmetic issues in the code of the PCI front-end.
- Change some softc members to be unsigned where more appropriate and
  remove unused ones.

Approved by:	re (kib)
Obtained from:	NetBSD (partially) [2], OpenBSD [1]
MFC after:	2 weeks
2009-06-23 20:36:59 +00:00

211 lines
5.5 KiB
C

/*-
* Copyright (C) 2001 Eduardo Horvath.
* Copyright (c) 2007 Marius Strobl <marius@FreeBSD.org>
* All rights reserved.
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: NetBSD: if_gem_pci.c,v 1.7 2001/10/18 15:09:15 thorpej Exp
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* SBus bindings for Sun GEM Ethernet controllers
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/resource.h>
#include <sys/rman.h>
#include <sys/socket.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <dev/ofw/ofw_bus.h>
#include <machine/bus.h>
#include <machine/ofw_machdep.h>
#include <machine/resource.h>
#include <sparc64/sbus/sbusvar.h>
#include <dev/gem/if_gemreg.h>
#include <dev/gem/if_gemvar.h>
#include "miibus_if.h"
static device_probe_t gem_sbus_probe;
static device_attach_t gem_sbus_attach;
static device_detach_t gem_sbus_detach;
static device_suspend_t gem_sbus_suspend;
static device_resume_t gem_sbus_resume;
static device_method_t gem_sbus_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, gem_sbus_probe),
DEVMETHOD(device_attach, gem_sbus_attach),
DEVMETHOD(device_detach, gem_sbus_detach),
DEVMETHOD(device_suspend, gem_sbus_suspend),
DEVMETHOD(device_resume, gem_sbus_resume),
/* Use the suspend handler here, it is all that is required. */
DEVMETHOD(device_shutdown, gem_sbus_suspend),
/* bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_driver_added, bus_generic_driver_added),
/* MII interface */
DEVMETHOD(miibus_readreg, gem_mii_readreg),
DEVMETHOD(miibus_writereg, gem_mii_writereg),
DEVMETHOD(miibus_statchg, gem_mii_statchg),
KOBJMETHOD_END
};
static driver_t gem_sbus_driver = {
"gem",
gem_sbus_methods,
sizeof(struct gem_softc)
};
DRIVER_MODULE(gem, sbus, gem_sbus_driver, gem_devclass, 0, 0);
MODULE_DEPEND(gem, sbus, 1, 1, 1);
MODULE_DEPEND(gem, ether, 1, 1, 1);
static int
gem_sbus_probe(device_t dev)
{
if (strcmp(ofw_bus_get_name(dev), "network") == 0 &&
ofw_bus_get_compat(dev) != NULL &&
strcmp(ofw_bus_get_compat(dev), "SUNW,sbus-gem") == 0) {
device_set_desc(dev, "Sun GEM Gigabit Ethernet");
return (0);
}
return (ENXIO);
}
static struct resource_spec gem_sbus_res_spec[] = {
{ SYS_RES_IRQ, 0, RF_SHAREABLE | RF_ACTIVE }, /* GEM_RES_INTR */
{ SYS_RES_MEMORY, 1, RF_ACTIVE }, /* GEM_RES_BANK1 */
{ SYS_RES_MEMORY, 0, RF_ACTIVE }, /* GEM_RES_BANK2 */
{ -1, 0 }
};
static int
gem_sbus_attach(device_t dev)
{
struct gem_softc *sc;
int burst;
uint32_t val;
sc = device_get_softc(dev);
sc->sc_variant = GEM_SUN_GEM;
sc->sc_dev = dev;
if (bus_alloc_resources(dev, gem_sbus_res_spec, sc->sc_res)) {
device_printf(dev, "failed to allocate resources\n");
bus_release_resources(dev, gem_sbus_res_spec, sc->sc_res);
return (ENXIO);
}
GEM_LOCK_INIT(sc, device_get_nameunit(dev));
OF_getetheraddr(dev, sc->sc_enaddr);
burst = sbus_get_burstsz(dev);
val = GEM_SBUS_CFG_PARITY;
if ((burst & SBUS_BURST64_MASK) != 0) {
val |= GEM_SBUS_CFG_64BIT;
burst >>= SBUS_BURST64_SHIFT;
}
if ((burst & SBUS_BURST_64) != 0)
val |= GEM_SBUS_CFG_BURST_64;
else if ((burst & SBUS_BURST_32) != 0)
val |= GEM_SBUS_CFG_BURST_32;
else {
device_printf(dev, "unsupported burst size\n");
goto fail;
}
/* Reset the SBus interface only. */
(void)GEM_BANK2_READ_4(sc, GEM_SBUS_BIF_RESET);
DELAY(100);
GEM_BANK2_WRITE_4(sc, GEM_SBUS_CONFIG, val);
if (gem_attach(sc) != 0) {
device_printf(dev, "could not be attached\n");
goto fail;
}
if (bus_setup_intr(dev, sc->sc_res[GEM_RES_INTR], INTR_TYPE_NET |
INTR_MPSAFE, NULL, gem_intr, sc, &sc->sc_ih) != 0) {
device_printf(dev, "failed to set up interrupt\n");
gem_detach(sc);
goto fail;
}
return (0);
fail:
GEM_LOCK_DESTROY(sc);
bus_release_resources(dev, gem_sbus_res_spec, sc->sc_res);
return (ENXIO);
}
static int
gem_sbus_detach(device_t dev)
{
struct gem_softc *sc;
sc = device_get_softc(dev);
bus_teardown_intr(dev, sc->sc_res[GEM_RES_INTR], sc->sc_ih);
gem_detach(sc);
GEM_LOCK_DESTROY(sc);
bus_release_resources(dev, gem_sbus_res_spec, sc->sc_res);
return (0);
}
static int
gem_sbus_suspend(device_t dev)
{
gem_suspend(device_get_softc(dev));
return (0);
}
static int
gem_sbus_resume(device_t dev)
{
gem_resume(device_get_softc(dev));
return (0);
}