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freebsd/sys/dev/pdq/if_fpa.c
John Baldwin 71098608fc Several fixes to these drivers. Note that these two drivers are actually
just two different attachments (EISA and PCI) to a single driver.
- Add real locking.  Previously these drivers only acquired their lock
  in their interrupt handler or in the ioctl routine (but too broadly in
  the latter).  No locking was used for the stack calling down into the
  driver via if_init() or if_start(), for device shutdown or detach.  Also,
  the interrupt handler held the driver lock while calling if_input().  All
  this stuff should be fixed in the locking changes.
- Really fix these drivers to handle if_alloc().  The front-end attachments
  were using if_initname() before the ifnet was allocated.  Fix this by
  moving some of the duplicated logic from each driver into pdq_ifattach().
  While here, make pdq_ifattach() return an error so that the driver just
  fails to attach if if_alloc() fails rather than panic'ing.  Also, defer
  freeing the ifnet until the driver has stopped using it during detach.
- Add a new private timer to drive the watchdog timer.
- Pass the softc pointer to the interrupt handlers instead of the device_t
  so we can avoid the use of device_get_softc() and to better match what
  other drivers do.
2009-11-19 19:25:47 +00:00

208 lines
4.9 KiB
C

/*-
* Copyright (c) 1995, 1996 Matt Thomas <matt@3am-software.com>
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* 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.
*
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* DEC PDQ FDDI Controller; code for BSD derived operating systems
*
* This module supports the DEC DEFPA PCI FDDI Controller
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <net/if.h>
#include <net/if_media.h>
#include <net/fddi.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pdq/pdq_freebsd.h>
#include <dev/pdq/pdqreg.h>
#define DEC_VENDORID 0x1011
#define DEFPA_CHIPID 0x000F
#define DEFPA_LATENCY 0x88
#define PCI_CFLT 0x0C /* Configuration Latency */
#define PCI_CBMA 0x10 /* Configuration Base Memory Address */
#define PCI_CBIO 0x14 /* Configuration Base I/O Address */
static int pdq_pci_probe (device_t);
static int pdq_pci_attach (device_t);
static int pdq_pci_detach (device_t);
static int pdq_pci_shutdown (device_t);
static void pdq_pci_ifintr (void *);
static void
pdq_pci_ifintr(void *arg)
{
pdq_softc_t *sc;
sc = arg;
PDQ_LOCK(sc);
(void) pdq_interrupt(sc->sc_pdq);
PDQ_UNLOCK(sc);
return;
}
/*
* This is the PCI configuration support.
*/
static int
pdq_pci_probe(device_t dev)
{
if (pci_get_vendor(dev) == DEC_VENDORID &&
pci_get_device(dev) == DEFPA_CHIPID) {
device_set_desc(dev, "Digital DEFPA PCI FDDI Controller");
return (BUS_PROBE_DEFAULT);
}
return (ENXIO);
}
static int
pdq_pci_attach(device_t dev)
{
pdq_softc_t *sc;
u_int32_t command;
int error;
sc = device_get_softc(dev);
sc->dev = dev;
/*
* Map control/status registers.
*/
pci_enable_busmaster(dev);
command = pci_read_config(dev, PCIR_LATTIMER, 1);
if (command < DEFPA_LATENCY) {
command = DEFPA_LATENCY;
pci_write_config(dev, PCIR_LATTIMER, command, 1);
}
sc->mem_rid = PCI_CBMA;
sc->mem_type = SYS_RES_MEMORY;
sc->mem = bus_alloc_resource_any(dev, sc->mem_type, &sc->mem_rid,
RF_ACTIVE);
if (!sc->mem) {
device_printf(dev, "Unable to allocate I/O space resource.\n");
error = ENXIO;
goto bad;
}
sc->mem_bsh = rman_get_bushandle(sc->mem);
sc->mem_bst = rman_get_bustag(sc->mem);
sc->irq_rid = 0;
sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid,
RF_SHAREABLE | RF_ACTIVE);
if (!sc->irq) {
device_printf(dev, "Unable to allocate interrupt resource.\n");
error = ENXIO;
goto bad;
}
error = pdq_ifattach(sc, sc->sc_pdq->pdq_hwaddr.lanaddr_bytes, PDQ_DEFPA);
if (error)
goto bad;
error = bus_setup_intr(dev, sc->irq, INTR_TYPE_NET | INTR_MPSAFE, NULL,
pdq_pci_ifintr, sc, &sc->irq_ih);
if (error) {
device_printf(dev, "Failed to setup interrupt handler.\n");
pdq_ifdetach(sc);
return (error);
}
return (0);
bad:
pdq_free(dev);
return (error);
}
static int
pdq_pci_detach (dev)
device_t dev;
{
pdq_softc_t *sc;
sc = device_get_softc(dev);
pdq_ifdetach(sc);
return (0);
}
static int
pdq_pci_shutdown(device_t dev)
{
pdq_softc_t *sc;
sc = device_get_softc(dev);
PDQ_LOCK(sc);
pdq_hwreset(sc->sc_pdq);
PDQ_UNLOCK(sc);
return (0);
}
static device_method_t pdq_pci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, pdq_pci_probe),
DEVMETHOD(device_attach, pdq_pci_attach),
DEVMETHOD(device_detach, pdq_pci_detach),
DEVMETHOD(device_shutdown, pdq_pci_shutdown),
{ 0, 0 }
};
static driver_t pdq_pci_driver = {
"fpa",
pdq_pci_methods,
sizeof(pdq_softc_t),
};
DRIVER_MODULE(fpa, pci, pdq_pci_driver, pdq_devclass, 0, 0);
MODULE_DEPEND(fpa, pci, 1, 1, 1);
MODULE_DEPEND(fpa, fddi, 1, 1, 1);