674 lines
16 KiB
C
674 lines
16 KiB
C
/* $NetBSD: mii.c,v 1.12 1999/08/03 19:41:49 drochner Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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/*
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* MII bus layer, glues MII-capable network interface drivers to sharable
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* PHY drivers. This exports an interface compatible with BSD/OS 3.0's,
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* plus some NetBSD extensions.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/socket.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/sbuf.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_media.h>
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#include <dev/mii/mii.h>
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#include <dev/mii/miivar.h>
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MODULE_VERSION(miibus, 1);
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#include "miibus_if.h"
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static bus_child_detached_t miibus_child_detached;
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static bus_child_location_t miibus_child_location;
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static bus_child_pnpinfo_t miibus_child_pnpinfo;
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static device_detach_t miibus_detach;
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static bus_hinted_child_t miibus_hinted_child;
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static bus_print_child_t miibus_print_child;
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static device_probe_t miibus_probe;
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static bus_read_ivar_t miibus_read_ivar;
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static miibus_readreg_t miibus_readreg;
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static miibus_statchg_t miibus_statchg;
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static miibus_writereg_t miibus_writereg;
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static miibus_linkchg_t miibus_linkchg;
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static miibus_mediainit_t miibus_mediainit;
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static unsigned char mii_bitreverse(unsigned char x);
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static device_method_t miibus_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, miibus_probe),
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DEVMETHOD(device_attach, miibus_attach),
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DEVMETHOD(device_detach, miibus_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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/* bus interface */
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DEVMETHOD(bus_print_child, miibus_print_child),
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DEVMETHOD(bus_read_ivar, miibus_read_ivar),
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DEVMETHOD(bus_child_detached, miibus_child_detached),
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DEVMETHOD(bus_child_pnpinfo, miibus_child_pnpinfo),
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DEVMETHOD(bus_child_location, miibus_child_location),
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DEVMETHOD(bus_hinted_child, miibus_hinted_child),
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/* MII interface */
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DEVMETHOD(miibus_readreg, miibus_readreg),
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DEVMETHOD(miibus_writereg, miibus_writereg),
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DEVMETHOD(miibus_statchg, miibus_statchg),
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DEVMETHOD(miibus_linkchg, miibus_linkchg),
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DEVMETHOD(miibus_mediainit, miibus_mediainit),
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DEVMETHOD_END
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};
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DEFINE_CLASS_0(miibus, miibus_driver, miibus_methods, sizeof(struct mii_data));
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struct miibus_ivars {
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if_t ifp;
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ifm_change_cb_t ifmedia_upd;
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ifm_stat_cb_t ifmedia_sts;
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u_int mii_flags;
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u_int mii_offset;
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};
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static int
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miibus_probe(device_t dev)
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{
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device_set_desc(dev, "MII bus");
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return (BUS_PROBE_SPECIFIC);
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}
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int
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miibus_attach(device_t dev)
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{
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struct miibus_ivars *ivars;
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struct mii_attach_args *ma;
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struct mii_data *mii;
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device_t *children;
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int i, nchildren;
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mii = device_get_softc(dev);
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if (device_get_children(dev, &children, &nchildren) == 0) {
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for (i = 0; i < nchildren; i++) {
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ma = device_get_ivars(children[i]);
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ma->mii_data = mii;
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}
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free(children, M_TEMP);
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}
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if (nchildren == 0) {
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device_printf(dev, "cannot get children\n");
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return (ENXIO);
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}
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ivars = device_get_ivars(dev);
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ifmedia_init(&mii->mii_media, IFM_IMASK, ivars->ifmedia_upd,
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ivars->ifmedia_sts);
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mii->mii_ifp = ivars->ifp;
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if_setcapabilitiesbit(mii->mii_ifp, IFCAP_LINKSTATE, 0);
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if_setcapenablebit(mii->mii_ifp, IFCAP_LINKSTATE, 0);
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LIST_INIT(&mii->mii_phys);
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return (bus_generic_attach(dev));
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}
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static int
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miibus_detach(device_t dev)
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{
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struct mii_data *mii;
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struct miibus_ivars *ivars;
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ivars = device_get_ivars(dev);
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bus_generic_detach(dev);
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mii = device_get_softc(dev);
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ifmedia_removeall(&mii->mii_media);
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free(ivars, M_DEVBUF);
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mii->mii_ifp = NULL;
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return (0);
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}
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static void
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miibus_child_detached(device_t dev, device_t child)
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{
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struct mii_attach_args *args;
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args = device_get_ivars(child);
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free(args, M_DEVBUF);
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}
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static int
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miibus_print_child(device_t dev, device_t child)
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{
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struct mii_attach_args *ma;
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int retval;
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ma = device_get_ivars(child);
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retval = bus_print_child_header(dev, child);
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retval += printf(" PHY %d", ma->mii_phyno);
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retval += bus_print_child_footer(dev, child);
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return (retval);
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}
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static int
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miibus_read_ivar(device_t dev, device_t child __unused, int which,
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uintptr_t *result)
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{
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struct miibus_ivars *ivars;
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/*
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* NB: this uses the instance variables of the miibus rather than
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* its PHY children.
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*/
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ivars = device_get_ivars(dev);
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switch (which) {
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case MIIBUS_IVAR_FLAGS:
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*result = ivars->mii_flags;
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break;
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default:
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return (ENOENT);
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}
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return (0);
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}
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static int
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miibus_child_pnpinfo(device_t dev __unused, device_t child, struct sbuf *sb)
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{
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struct mii_attach_args *ma;
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ma = device_get_ivars(child);
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sbuf_printf(sb, "oui=0x%x model=0x%x rev=0x%x",
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MII_OUI(ma->mii_id1, ma->mii_id2),
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MII_MODEL(ma->mii_id2), MII_REV(ma->mii_id2));
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return (0);
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}
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static int
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miibus_child_location(device_t dev __unused, device_t child, struct sbuf *sb)
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{
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struct mii_attach_args *ma;
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ma = device_get_ivars(child);
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sbuf_printf(sb, "phyno=%d", ma->mii_phyno);
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return (0);
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}
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static void
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miibus_hinted_child(device_t dev, const char *name, int unit)
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{
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struct miibus_ivars *ivars;
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struct mii_attach_args *args, *ma;
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device_t *children, phy;
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int i, nchildren;
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u_int val;
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if (resource_int_value(name, unit, "phyno", &val) != 0)
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return;
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if (device_get_children(dev, &children, &nchildren) != 0)
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return;
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ma = NULL;
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for (i = 0; i < nchildren; i++) {
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args = device_get_ivars(children[i]);
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if (args->mii_phyno == val) {
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ma = args;
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break;
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}
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}
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free(children, M_TEMP);
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/*
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* Don't add a PHY that was automatically identified by having media
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* in its BMSR twice, only allow to alter its attach arguments.
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*/
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if (ma == NULL) {
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ma = malloc(sizeof(struct mii_attach_args), M_DEVBUF,
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M_NOWAIT);
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if (ma == NULL)
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return;
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phy = device_add_child(dev, name, unit);
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if (phy == NULL) {
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free(ma, M_DEVBUF);
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return;
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}
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ivars = device_get_ivars(dev);
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ma->mii_phyno = val;
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ma->mii_offset = ivars->mii_offset++;
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ma->mii_id1 = 0;
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ma->mii_id2 = 0;
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ma->mii_capmask = BMSR_DEFCAPMASK;
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device_set_ivars(phy, ma);
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}
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if (resource_int_value(name, unit, "id1", &val) == 0)
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ma->mii_id1 = val;
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if (resource_int_value(name, unit, "id2", &val) == 0)
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ma->mii_id2 = val;
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if (resource_int_value(name, unit, "capmask", &val) == 0)
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ma->mii_capmask = val;
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}
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static int
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miibus_readreg(device_t dev, int phy, int reg)
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{
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device_t parent;
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parent = device_get_parent(dev);
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return (MIIBUS_READREG(parent, phy, reg));
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}
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static int
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miibus_writereg(device_t dev, int phy, int reg, int data)
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{
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device_t parent;
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parent = device_get_parent(dev);
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return (MIIBUS_WRITEREG(parent, phy, reg, data));
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}
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static void
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miibus_statchg(device_t dev)
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{
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device_t parent;
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struct mii_data *mii;
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parent = device_get_parent(dev);
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MIIBUS_STATCHG(parent);
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mii = device_get_softc(dev);
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if_setbaudrate(mii->mii_ifp, ifmedia_baudrate(mii->mii_media_active));
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}
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static void
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miibus_linkchg(device_t dev)
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{
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struct mii_data *mii;
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device_t parent;
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int link_state;
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parent = device_get_parent(dev);
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MIIBUS_LINKCHG(parent);
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mii = device_get_softc(dev);
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if (mii->mii_media_status & IFM_AVALID) {
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if (mii->mii_media_status & IFM_ACTIVE)
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link_state = LINK_STATE_UP;
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else
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link_state = LINK_STATE_DOWN;
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} else
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link_state = LINK_STATE_UNKNOWN;
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if_link_state_change(mii->mii_ifp, link_state);
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}
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static void
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miibus_mediainit(device_t dev)
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{
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struct mii_data *mii;
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struct ifmedia_entry *m;
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int media = 0;
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/* Poke the parent in case it has any media of its own to add. */
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MIIBUS_MEDIAINIT(device_get_parent(dev));
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mii = device_get_softc(dev);
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LIST_FOREACH(m, &mii->mii_media.ifm_list, ifm_list) {
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media = m->ifm_media;
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if (media == (IFM_ETHER | IFM_AUTO))
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break;
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}
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ifmedia_set(&mii->mii_media, media);
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}
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/*
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* Helper function used by network interface drivers, attaches the miibus and
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* the PHYs to the network interface driver parent.
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*/
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int
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mii_attach(device_t dev, device_t *miibus, if_t ifp,
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ifm_change_cb_t ifmedia_upd, ifm_stat_cb_t ifmedia_sts, int capmask,
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int phyloc, int offloc, int flags)
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{
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struct miibus_ivars *ivars;
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struct mii_attach_args *args, ma;
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device_t *children, phy;
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int bmsr, first, i, nchildren, phymax, phymin, rv;
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uint32_t phymask;
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bus_topo_assert();
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if (phyloc != MII_PHY_ANY && offloc != MII_OFFSET_ANY) {
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printf("%s: phyloc and offloc specified\n", __func__);
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return (EINVAL);
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}
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if (offloc != MII_OFFSET_ANY && (offloc < 0 || offloc >= MII_NPHY)) {
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printf("%s: invalid offloc %d\n", __func__, offloc);
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return (EINVAL);
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}
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if (phyloc == MII_PHY_ANY) {
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phymin = 0;
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phymax = MII_NPHY - 1;
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} else {
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if (phyloc < 0 || phyloc >= MII_NPHY) {
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printf("%s: invalid phyloc %d\n", __func__, phyloc);
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return (EINVAL);
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}
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phymin = phymax = phyloc;
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}
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first = 0;
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if (*miibus == NULL) {
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first = 1;
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ivars = malloc(sizeof(*ivars), M_DEVBUF, M_NOWAIT);
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if (ivars == NULL)
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return (ENOMEM);
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ivars->ifp = ifp;
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ivars->ifmedia_upd = ifmedia_upd;
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ivars->ifmedia_sts = ifmedia_sts;
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ivars->mii_flags = flags;
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*miibus = device_add_child(dev, "miibus", -1);
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if (*miibus == NULL) {
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rv = ENXIO;
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goto fail;
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}
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device_set_ivars(*miibus, ivars);
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} else {
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ivars = device_get_ivars(*miibus);
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if (ivars->ifp != ifp || ivars->ifmedia_upd != ifmedia_upd ||
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ivars->ifmedia_sts != ifmedia_sts ||
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ivars->mii_flags != flags) {
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printf("%s: non-matching invariant\n", __func__);
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return (EINVAL);
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}
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/*
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* Assignment of the attach arguments mii_data for the first
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* pass is done in miibus_attach(), i.e. once the miibus softc
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* has been allocated.
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*/
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ma.mii_data = device_get_softc(*miibus);
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}
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ma.mii_capmask = capmask;
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if (resource_int_value(device_get_name(*miibus),
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device_get_unit(*miibus), "phymask", &phymask) != 0)
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phymask = 0xffffffff;
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if (device_get_children(*miibus, &children, &nchildren) != 0) {
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children = NULL;
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nchildren = 0;
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}
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ivars->mii_offset = 0;
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for (ma.mii_phyno = phymin; ma.mii_phyno <= phymax; ma.mii_phyno++) {
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/*
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* Make sure we haven't already configured a PHY at this
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* address. This allows mii_attach() to be called
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* multiple times.
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*/
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for (i = 0; i < nchildren; i++) {
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args = device_get_ivars(children[i]);
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if (args->mii_phyno == ma.mii_phyno) {
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/*
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* Yes, there is already something
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* configured at this address.
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*/
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goto skip;
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}
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}
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/*
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* Check to see if there is a PHY at this address. Note,
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* many braindead PHYs report 0/0 in their ID registers,
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* so we test for media in the BMSR.
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*/
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bmsr = MIIBUS_READREG(dev, ma.mii_phyno, MII_BMSR);
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if (bmsr == 0 || bmsr == 0xffff ||
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(bmsr & (BMSR_EXTSTAT | BMSR_MEDIAMASK)) == 0) {
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/* Assume no PHY at this address. */
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continue;
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}
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/*
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* There is a PHY at this address. If we were given an
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* `offset' locator, skip this PHY if it doesn't match.
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*/
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if (offloc != MII_OFFSET_ANY && offloc != ivars->mii_offset)
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goto skip;
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/*
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* Skip this PHY if it's not included in the phymask hint.
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*/
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if ((phymask & (1 << ma.mii_phyno)) == 0)
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goto skip;
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/*
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* Extract the IDs. Braindead PHYs will be handled by
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* the `ukphy' driver, as we have no ID information to
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* match on.
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*/
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ma.mii_id1 = MIIBUS_READREG(dev, ma.mii_phyno, MII_PHYIDR1);
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ma.mii_id2 = MIIBUS_READREG(dev, ma.mii_phyno, MII_PHYIDR2);
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ma.mii_offset = ivars->mii_offset;
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args = malloc(sizeof(struct mii_attach_args), M_DEVBUF,
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M_NOWAIT);
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if (args == NULL)
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goto skip;
|
|
bcopy((char *)&ma, (char *)args, sizeof(ma));
|
|
phy = device_add_child(*miibus, NULL, -1);
|
|
if (phy == NULL) {
|
|
free(args, M_DEVBUF);
|
|
goto skip;
|
|
}
|
|
device_set_ivars(phy, args);
|
|
skip:
|
|
ivars->mii_offset++;
|
|
}
|
|
free(children, M_TEMP);
|
|
|
|
if (first != 0) {
|
|
rv = device_set_driver(*miibus, &miibus_driver);
|
|
if (rv != 0)
|
|
goto fail;
|
|
bus_enumerate_hinted_children(*miibus);
|
|
rv = device_get_children(*miibus, &children, &nchildren);
|
|
if (rv != 0)
|
|
goto fail;
|
|
free(children, M_TEMP);
|
|
if (nchildren == 0) {
|
|
rv = ENXIO;
|
|
goto fail;
|
|
}
|
|
rv = bus_generic_attach(dev);
|
|
if (rv != 0)
|
|
goto fail;
|
|
|
|
/* Attaching of the PHY drivers is done in miibus_attach(). */
|
|
return (0);
|
|
}
|
|
rv = bus_generic_attach(*miibus);
|
|
if (rv != 0)
|
|
goto fail;
|
|
|
|
return (0);
|
|
|
|
fail:
|
|
if (*miibus != NULL)
|
|
device_delete_child(dev, *miibus);
|
|
free(ivars, M_DEVBUF);
|
|
if (first != 0)
|
|
*miibus = NULL;
|
|
return (rv);
|
|
}
|
|
|
|
/*
|
|
* Media changed; notify all PHYs.
|
|
*/
|
|
int
|
|
mii_mediachg(struct mii_data *mii)
|
|
{
|
|
struct mii_softc *child;
|
|
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
|
|
int rv;
|
|
|
|
mii->mii_media_status = 0;
|
|
mii->mii_media_active = IFM_NONE;
|
|
|
|
LIST_FOREACH(child, &mii->mii_phys, mii_list) {
|
|
/*
|
|
* If the media indicates a different PHY instance,
|
|
* isolate this one.
|
|
*/
|
|
if (IFM_INST(ife->ifm_media) != child->mii_inst) {
|
|
if ((child->mii_flags & MIIF_NOISOLATE) != 0) {
|
|
device_printf(child->mii_dev, "%s: "
|
|
"can't handle non-zero PHY instance %d\n",
|
|
__func__, child->mii_inst);
|
|
continue;
|
|
}
|
|
PHY_WRITE(child, MII_BMCR, PHY_READ(child, MII_BMCR) |
|
|
BMCR_ISO);
|
|
continue;
|
|
}
|
|
rv = PHY_SERVICE(child, mii, MII_MEDIACHG);
|
|
if (rv)
|
|
return (rv);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Call the PHY tick routines, used during autonegotiation.
|
|
*/
|
|
void
|
|
mii_tick(struct mii_data *mii)
|
|
{
|
|
struct mii_softc *child;
|
|
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
|
|
|
|
LIST_FOREACH(child, &mii->mii_phys, mii_list) {
|
|
/*
|
|
* If this PHY instance isn't currently selected, just skip
|
|
* it.
|
|
*/
|
|
if (IFM_INST(ife->ifm_media) != child->mii_inst)
|
|
continue;
|
|
(void)PHY_SERVICE(child, mii, MII_TICK);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get media status from PHYs.
|
|
*/
|
|
void
|
|
mii_pollstat(struct mii_data *mii)
|
|
{
|
|
struct mii_softc *child;
|
|
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
|
|
|
|
mii->mii_media_status = 0;
|
|
mii->mii_media_active = IFM_NONE;
|
|
|
|
LIST_FOREACH(child, &mii->mii_phys, mii_list) {
|
|
/*
|
|
* If we're not polling this PHY instance, just skip it.
|
|
*/
|
|
if (IFM_INST(ife->ifm_media) != child->mii_inst)
|
|
continue;
|
|
(void)PHY_SERVICE(child, mii, MII_POLLSTAT);
|
|
}
|
|
}
|
|
|
|
static unsigned char
|
|
mii_bitreverse(unsigned char x)
|
|
{
|
|
static unsigned const char nibbletab[16] = {
|
|
0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, 11, 7, 15
|
|
};
|
|
|
|
return ((nibbletab[x & 15] << 4) | nibbletab[x >> 4]);
|
|
}
|
|
|
|
u_int
|
|
mii_oui(u_int id1, u_int id2)
|
|
{
|
|
u_int h;
|
|
|
|
h = (id1 << 6) | (id2 >> 10);
|
|
|
|
return ((mii_bitreverse(h >> 16) << 16) |
|
|
(mii_bitreverse((h >> 8) & 0xff) << 8) |
|
|
mii_bitreverse(h & 0xff));
|
|
}
|
|
|
|
int
|
|
mii_phy_mac_match(struct mii_softc *mii, const char *name)
|
|
{
|
|
|
|
return (strcmp(device_get_name(device_get_parent(mii->mii_dev)),
|
|
name) == 0);
|
|
}
|
|
|
|
int
|
|
mii_dev_mac_match(device_t parent, const char *name)
|
|
{
|
|
|
|
return (strcmp(device_get_name(device_get_parent(
|
|
device_get_parent(parent))), name) == 0);
|
|
}
|
|
|
|
void *
|
|
mii_phy_mac_softc(struct mii_softc *mii)
|
|
{
|
|
|
|
return (device_get_softc(device_get_parent(mii->mii_dev)));
|
|
}
|
|
|
|
void *
|
|
mii_dev_mac_softc(device_t parent)
|
|
{
|
|
|
|
return (device_get_softc(device_get_parent(device_get_parent(parent))));
|
|
}
|