c75c2a68a7
and take advantage of rman_get_rid(9) in order to save some softc members. - Provide and consume module dependency information for lebuffer(4).
393 lines
11 KiB
C
393 lines
11 KiB
C
/*-
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* Copyright (c) 2006 Marius Strobl <marius@FreeBSD.org>
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* All rights reserved.
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/endian.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/resource.h>
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#include <sys/rman.h>
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#include <sys/socket.h>
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#include <dev/ofw/ofw_bus.h>
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#include <machine/bus.h>
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#include <machine/ofw_machdep.h>
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#include <machine/resource.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_media.h>
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#include <dev/le/lancereg.h>
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#include <dev/le/lancevar.h>
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#include <dev/le/am7990reg.h>
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#include <dev/le/am7990var.h>
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/*
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* LANCE registers
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*/
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#define LEREG1_RDP 0 /* Register Data port */
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#define LEREG1_RAP 2 /* Register Address port */
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struct le_lebuffer_softc {
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struct am7990_softc sc_am7990; /* glue to MI code */
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struct resource *sc_bres;
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struct resource *sc_rres;
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struct resource *sc_ires;
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void *sc_ih;
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};
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static devclass_t le_lebuffer_devclass;
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static device_probe_t le_lebuffer_probe;
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static device_attach_t le_lebuffer_attach;
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static device_detach_t le_lebuffer_detach;
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static device_resume_t le_buffer_resume;
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static device_suspend_t le_buffer_suspend;
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static device_method_t le_lebuffer_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, le_lebuffer_probe),
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DEVMETHOD(device_attach, le_lebuffer_attach),
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DEVMETHOD(device_detach, le_lebuffer_detach),
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/* We can just use the suspend method here. */
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DEVMETHOD(device_shutdown, le_buffer_suspend),
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DEVMETHOD(device_suspend, le_buffer_suspend),
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DEVMETHOD(device_resume, le_buffer_resume),
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{ 0, 0 }
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};
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DEFINE_CLASS_0(le, le_lebuffer_driver, le_lebuffer_methods,
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sizeof(struct le_lebuffer_softc));
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DRIVER_MODULE(le, lebuffer, le_lebuffer_driver, le_lebuffer_devclass, 0, 0);
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MODULE_DEPEND(le, ether, 1, 1, 1);
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MODULE_DEPEND(le, lebuffer, 1, 1, 1);
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/*
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* Media types supported
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*/
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static const int le_lebuffer_media[] = {
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IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, 0)
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};
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#define NLEMEDIA \
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(sizeof(le_lebuffer_media) / sizeof(le_lebuffer_media[0]))
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static void le_lebuffer_wrcsr(struct lance_softc *, uint16_t, uint16_t);
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static uint16_t le_lebuffer_rdcsr(struct lance_softc *, uint16_t);
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static void le_lebuffer_copytodesc(struct lance_softc *, void *, int, int);
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static void le_lebuffer_copyfromdesc(struct lance_softc *, void *, int, int);
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static void le_lebuffer_copytobuf(struct lance_softc *, void *, int, int);
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static void le_lebuffer_copyfrombuf(struct lance_softc *, void *, int, int);
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static void le_lebuffer_zerobuf(struct lance_softc *, int, int);
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static void
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le_lebuffer_wrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
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{
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struct le_lebuffer_softc *lesc = (struct le_lebuffer_softc *)sc;
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bus_write_2(lesc->sc_rres, LEREG1_RAP, port);
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bus_barrier(lesc->sc_rres, LEREG1_RAP, 2, BUS_SPACE_BARRIER_WRITE);
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bus_write_2(lesc->sc_rres, LEREG1_RDP, val);
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}
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static uint16_t
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le_lebuffer_rdcsr(struct lance_softc *sc, uint16_t port)
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{
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struct le_lebuffer_softc *lesc = (struct le_lebuffer_softc *)sc;
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bus_write_2(lesc->sc_rres, LEREG1_RAP, port);
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bus_barrier(lesc->sc_rres, LEREG1_RAP, 2, BUS_SPACE_BARRIER_WRITE);
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return (bus_read_2(lesc->sc_rres, LEREG1_RDP));
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}
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/*
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* It turns out that using bus_space(9) to access the buffers and the
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* descriptors yields way more throughput than accessing them via the
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* KVA returned by rman_get_virtual(9). The descriptor rings can be
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* accessed using 8-bit up to 64-bit operations while the buffers can
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* be only accessed using 8-bit and 16-bit operations.
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* NB: For whatever reason setting LE_C3_BSWP has no effect with at
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* least the 501-2981 (although their 'busmaster-regval' property
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* indicates to set LE_C3_BSWP also for these cards), so we need
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* to manually byte swap access to the buffers, i.e. the accesses
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* going through the RX/TX FIFOs.
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*/
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static void
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le_lebuffer_copytodesc(struct lance_softc *sc, void *fromv, int off, int len)
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{
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struct le_lebuffer_softc *lesc = (struct le_lebuffer_softc *)sc;
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caddr_t from = fromv;
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for (; len >= 8; len -= 8, off += 8, from += 8)
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bus_write_8(lesc->sc_bres, off, be64dec(from));
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for (; len >= 4; len -= 4, off += 4, from += 4)
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bus_write_4(lesc->sc_bres, off, be32dec(from));
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for (; len >= 2; len -= 2, off += 2, from += 2)
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bus_write_2(lesc->sc_bres, off, be16dec(from));
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if (len == 1)
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bus_write_1(lesc->sc_bres, off, *from);
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}
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static void
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le_lebuffer_copyfromdesc(struct lance_softc *sc, void *tov, int off, int len)
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{
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struct le_lebuffer_softc *lesc = (struct le_lebuffer_softc *)sc;
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caddr_t to = tov;
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for (; len >= 8; len -= 8, off += 8, to += 8)
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be64enc(to,
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bus_read_8(lesc->sc_bres, off));
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for (; len >= 4; len -= 4, off += 4, to += 4)
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be32enc(to,
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bus_read_4(lesc->sc_bres, off));
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for (; len >= 2; len -= 2, off += 2, to += 2)
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be16enc(to,
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bus_read_2(lesc->sc_bres, off));
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if (len == 1)
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*to = bus_read_1(lesc->sc_bres, off);
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}
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static void
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le_lebuffer_copytobuf(struct lance_softc *sc, void *fromv, int off, int len)
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{
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struct le_lebuffer_softc *lesc = (struct le_lebuffer_softc *)sc;
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caddr_t from = fromv;
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for (; len >= 2; len -= 2, off += 2, from += 2)
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bus_write_2(lesc->sc_bres, off, le16dec(from));
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if (len == 1)
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bus_write_1(lesc->sc_bres, off + 1, *from);
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}
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static void
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le_lebuffer_copyfrombuf(struct lance_softc *sc, void *tov, int off, int len)
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{
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struct le_lebuffer_softc *lesc = (struct le_lebuffer_softc *)sc;
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caddr_t to = tov;
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for (; len >= 2; len -= 2, off += 2, to += 2)
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le16enc(to,
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bus_read_2(lesc->sc_bres, off));
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if (len == 1)
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*to = bus_read_1(lesc->sc_bres, off + 1);
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}
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static void
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le_lebuffer_zerobuf(struct lance_softc *sc, int off, int len)
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{
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struct le_lebuffer_softc *lesc = (struct le_lebuffer_softc *)sc;
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for (; len >= 2; len -= 2, off += 2)
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bus_write_2(lesc->sc_bres, off, 0);
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if (len == 1)
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bus_write_1(lesc->sc_bres, off + 1, 0);
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}
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static int
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le_lebuffer_probe(device_t dev)
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{
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if (strcmp(ofw_bus_get_name(dev), "le") == 0) {
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device_set_desc(dev, "LANCE Ethernet");
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return (BUS_PROBE_DEFAULT);
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}
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return (ENXIO);
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}
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static int
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le_lebuffer_attach(device_t dev)
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{
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struct le_lebuffer_softc *lesc;
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struct lance_softc *sc;
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int error, i;
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lesc = device_get_softc(dev);
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sc = &lesc->sc_am7990.lsc;
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LE_LOCK_INIT(sc, device_get_nameunit(dev));
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/*
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* The "register space" of the parent is just a buffer where the
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* the LANCE descriptor rings and the RX/TX buffers can be stored.
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*/
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i = 0;
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lesc->sc_bres = bus_alloc_resource_any(device_get_parent(dev),
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SYS_RES_MEMORY, &i, RF_ACTIVE);
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if (lesc->sc_bres == NULL) {
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device_printf(dev, "cannot allocate LANCE buffer\n");
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error = ENXIO;
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goto fail_mtx;
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}
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/* Allocate LANCE registers. */
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i = 0;
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lesc->sc_rres = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
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&i, RF_ACTIVE);
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if (lesc->sc_rres == NULL) {
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device_printf(dev, "cannot allocate LANCE registers\n");
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error = ENXIO;
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goto fail_bres;
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}
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/* Allocate LANCE interrupt. */
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i = 0;
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if ((lesc->sc_ires = bus_alloc_resource_any(dev, SYS_RES_IRQ,
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&i, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
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device_printf(dev, "cannot allocate interrupt\n");
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error = ENXIO;
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goto fail_rres;
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}
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/*
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* LANCE view is offset by buffer location.
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* Note that we don't use sc->sc_mem.
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*/
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sc->sc_addr = 0;
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sc->sc_memsize = rman_get_size(lesc->sc_bres);
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sc->sc_flags = 0;
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/* That old black magic... */
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if (OF_getprop(ofw_bus_get_node(dev), "busmaster-regval",
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&sc->sc_conf3, sizeof(sc->sc_conf3)) == -1)
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sc->sc_conf3 = LE_C3_ACON | LE_C3_BCON;
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/*
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* Make sure LE_C3_BSWP is cleared so that for cards where
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* that flag actually works le_lebuffer_copy{from,to}buf()
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* don't fail...
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*/
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sc->sc_conf3 &= ~LE_C3_BSWP;
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OF_getetheraddr(dev, sc->sc_enaddr);
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sc->sc_copytodesc = le_lebuffer_copytodesc;
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sc->sc_copyfromdesc = le_lebuffer_copyfromdesc;
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sc->sc_copytobuf = le_lebuffer_copytobuf;
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sc->sc_copyfrombuf = le_lebuffer_copyfrombuf;
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sc->sc_zerobuf = le_lebuffer_zerobuf;
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sc->sc_rdcsr = le_lebuffer_rdcsr;
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sc->sc_wrcsr = le_lebuffer_wrcsr;
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sc->sc_hwreset = NULL;
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sc->sc_hwinit = NULL;
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sc->sc_hwintr = NULL;
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sc->sc_nocarrier = NULL;
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sc->sc_mediachange = NULL;
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sc->sc_mediastatus = NULL;
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sc->sc_supmedia = le_lebuffer_media;
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sc->sc_nsupmedia = NLEMEDIA;
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sc->sc_defaultmedia = le_lebuffer_media[0];
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error = am7990_config(&lesc->sc_am7990, device_get_name(dev),
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device_get_unit(dev));
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if (error != 0) {
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device_printf(dev, "cannot attach Am7990\n");
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goto fail_ires;
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}
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error = bus_setup_intr(dev, lesc->sc_ires, INTR_TYPE_NET | INTR_MPSAFE,
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NULL, am7990_intr, sc, &lesc->sc_ih);
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if (error != 0) {
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device_printf(dev, "cannot set up interrupt\n");
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goto fail_am7990;
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}
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return (0);
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fail_am7990:
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am7990_detach(&lesc->sc_am7990);
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fail_ires:
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bus_release_resource(dev, SYS_RES_IRQ,
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rman_get_rid(lesc->sc_ires), lesc->sc_ires);
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fail_rres:
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bus_release_resource(dev, SYS_RES_MEMORY,
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rman_get_rid(lesc->sc_rres), lesc->sc_rres);
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fail_bres:
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bus_release_resource(device_get_parent(dev), SYS_RES_MEMORY,
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rman_get_rid(lesc->sc_bres), lesc->sc_bres);
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fail_mtx:
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LE_LOCK_DESTROY(sc);
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return (error);
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}
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static int
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le_lebuffer_detach(device_t dev)
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{
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struct le_lebuffer_softc *lesc;
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struct lance_softc *sc;
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lesc = device_get_softc(dev);
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sc = &lesc->sc_am7990.lsc;
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bus_teardown_intr(dev, lesc->sc_ires, lesc->sc_ih);
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am7990_detach(&lesc->sc_am7990);
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bus_release_resource(dev, SYS_RES_IRQ,
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rman_get_rid(lesc->sc_ires), lesc->sc_ires);
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bus_release_resource(dev, SYS_RES_MEMORY,
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rman_get_rid(lesc->sc_rres), lesc->sc_rres);
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bus_release_resource(device_get_parent(dev), SYS_RES_MEMORY,
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rman_get_rid(lesc->sc_bres), lesc->sc_bres);
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LE_LOCK_DESTROY(sc);
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return (0);
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}
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static int
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le_buffer_suspend(device_t dev)
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{
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struct le_lebuffer_softc *lesc;
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lesc = device_get_softc(dev);
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lance_suspend(&lesc->sc_am7990.lsc);
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return (0);
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}
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static int
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le_buffer_resume(device_t dev)
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{
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struct le_lebuffer_softc *lesc;
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lesc = device_get_softc(dev);
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lance_resume(&lesc->sc_am7990.lsc);
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return (0);
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}
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