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freebsd/sys/dev/le/if_le_ledma.c
Marius Strobl a7ee7a7d6a Add le(4), a driver for AMD Am7900 LANCE and Am79C9xx PCnet NICs ported
from NetBSD. This driver actually can replace lnc(4). Advantages over
lnc(4) are:
- Cleaner and more flexible regarding MD needs.
- Endian-clean and MPSAFE.
- Supports ALTQ, VLAN_MTU, ifmedia.
- Uses 32bit DMA for the PCI variants.

This commit includes front-ends for the dma(4) pseudo-bus found on SBus-
based sparc64 machines (thus supports the on-board LANCE in Sun Ultra 1)
and PCI. In order to actually replace lnc(4), the front-ends for ISA and
the PC98 CBUS would have to be added but for which I don't have hardware
to test.

Reviewed and some improvements by:	yongari
Tested on:				i386, sparc64
2006-01-31 14:48:58 +00:00

489 lines
13 KiB
C

/* $NetBSD: if_le_ledma.c,v 1.26 2005/12/11 12:23:44 christos Exp $ */
/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum; Jason R. Thorpe of the Numerical Aerospace
* Simulation Facility, NASA Ames Research Center; Paul Kranenburg.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/endian.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 <dev/ofw/ofw_bus.h>
#include <machine/bus.h>
#include <machine/ofw_machdep.h>
#include <machine/resource.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_media.h>
#include <sparc64/sbus/lsi64854reg.h>
#include <sparc64/sbus/lsi64854var.h>
#include <dev/le/lancereg.h>
#include <dev/le/lancevar.h>
#include <dev/le/am7990var.h>
#define LEDMA_BOUNDARY (16*1024*1024) /* must not cross 16MB boundary */
#define LEDMA_MEMSIZE (16*1024) /* LANCE memory size */
#define LEREG1_RDP 0 /* Register Data Port */
#define LEREG1_RAP 2 /* Register Address Port */
struct le_dma_softc {
struct am7990_softc sc_am7990; /* glue to MI code */
int sc_rrid;
struct resource *sc_rres;
bus_space_tag_t sc_regt;
bus_space_handle_t sc_regh;
int sc_irid;
struct resource *sc_ires;
void *sc_ih;
bus_dma_tag_t sc_dmat;
bus_dmamap_t sc_dmam;
bus_addr_t sc_laddr; /* LANCE DMA address */
struct lsi64854_softc *sc_dma; /* pointer to DMA engine */
};
static device_probe_t le_dma_probe;
static device_attach_t le_dma_attach;
static device_detach_t le_dma_detach;
static device_resume_t le_dma_resume;
static device_suspend_t le_dma_suspend;
static device_method_t le_dma_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, le_dma_probe),
DEVMETHOD(device_attach, le_dma_attach),
DEVMETHOD(device_detach, le_dma_detach),
/* We can just use the suspend method here. */
DEVMETHOD(device_shutdown, le_dma_suspend),
DEVMETHOD(device_suspend, le_dma_suspend),
DEVMETHOD(device_resume, le_dma_resume),
{ 0, 0 }
};
DEFINE_CLASS_0(le, le_dma_driver, le_dma_methods, sizeof(struct le_dma_softc));
DRIVER_MODULE(le, dma, le_dma_driver, le_devclass, 0, 0);
MODULE_DEPEND(le, ether, 1, 1, 1);
/*
* Media types supported
*/
static const int le_dma_supmedia[] = {
IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, 0),
IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, 0),
IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, 0)
};
static void le_dma_wrcsr(struct lance_softc *, uint16_t, uint16_t);
static uint16_t le_dma_rdcsr(struct lance_softc *, uint16_t);
static void le_dma_setutp(struct lance_softc *);
static void le_dma_setaui(struct lance_softc *);
static int le_dma_supmediachange(struct lance_softc *);
static void le_dma_supmediastatus(struct lance_softc *, struct ifmediareq *);
static void le_dma_hwreset(struct lance_softc *);
static int le_dma_hwintr(struct lance_softc *);
static void le_dma_nocarrier(struct lance_softc *);
static bus_dmamap_callback_t le_dma_dma_callback;
static void
le_dma_wrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
{
struct le_dma_softc *lesc = (struct le_dma_softc *)sc;
bus_space_write_2(lesc->sc_regt, lesc->sc_regh, LEREG1_RAP, port);
bus_space_barrier(lesc->sc_regt, lesc->sc_regh, LEREG1_RAP, 2,
BUS_SPACE_BARRIER_WRITE);
bus_space_write_2(lesc->sc_regt, lesc->sc_regh, LEREG1_RDP, val);
}
static uint16_t
le_dma_rdcsr(struct lance_softc *sc, uint16_t port)
{
struct le_dma_softc *lesc = (struct le_dma_softc *)sc;
bus_space_write_2(lesc->sc_regt, lesc->sc_regh, LEREG1_RAP, port);
bus_space_barrier(lesc->sc_regt, lesc->sc_regh, LEREG1_RAP, 2,
BUS_SPACE_BARRIER_WRITE);
return (bus_space_read_2(lesc->sc_regt, lesc->sc_regh, LEREG1_RDP));
}
static void
le_dma_setutp(struct lance_softc *sc)
{
struct lsi64854_softc *dma = ((struct le_dma_softc *)sc)->sc_dma;
L64854_SCSR(dma, L64854_GCSR(dma) | E_TP_AUI);
DELAY(20000); /* We must not touch the LANCE chip for 20ms. */
}
static void
le_dma_setaui(struct lance_softc *sc)
{
struct lsi64854_softc *dma = ((struct le_dma_softc *)sc)->sc_dma;
L64854_SCSR(dma, L64854_GCSR(dma) & ~E_TP_AUI);
DELAY(20000); /* We must not touch the LANCE chip for 20ms. */
}
static int
le_dma_supmediachange(struct lance_softc *sc)
{
struct ifmedia *ifm = &sc->sc_media;
if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
return (EINVAL);
/*
* Switch to the selected media. If autoselect is set, we don't
* really have to do anything. We'll switch to the other media
* when we detect loss of carrier.
*/
switch (IFM_SUBTYPE(ifm->ifm_media)) {
case IFM_10_T:
le_dma_setutp(sc);
break;
case IFM_10_5:
le_dma_setaui(sc);
break;
case IFM_AUTO:
break;
default:
return (EINVAL);
}
return (0);
}
static void
le_dma_supmediastatus(struct lance_softc *sc, struct ifmediareq *ifmr)
{
struct lsi64854_softc *dma = ((struct le_dma_softc *)sc)->sc_dma;
/*
* Notify the world which media we're currently using.
*/
if (L64854_GCSR(dma) & E_TP_AUI)
ifmr->ifm_active = IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, 0);
else
ifmr->ifm_active = IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, 0);
}
static void
le_dma_hwreset(struct lance_softc *sc)
{
struct le_dma_softc *lesc = (struct le_dma_softc *)sc;
struct lsi64854_softc *dma = lesc->sc_dma;
uint32_t aui_bit, csr;
/*
* Reset DMA channel.
*/
csr = L64854_GCSR(dma);
aui_bit = csr & E_TP_AUI;
DMA_RESET(dma);
/* Write bits 24-31 of Lance address. */
bus_space_write_4(dma->sc_regt, dma->sc_regh, L64854_REG_ENBAR,
lesc->sc_laddr & 0xff000000);
DMA_ENINTR(dma);
/*
* Disable E-cache invalidates on chip writes.
* Retain previous cable selection bit.
*/
csr = L64854_GCSR(dma);
csr |= (E_DSBL_WR_INVAL | aui_bit);
L64854_SCSR(dma, csr);
DELAY(20000); /* We must not touch the LANCE chip for 20ms. */
}
static int
le_dma_hwintr(struct lance_softc *sc)
{
struct le_dma_softc *lesc = (struct le_dma_softc *)sc;
struct lsi64854_softc *dma = lesc->sc_dma;
return (DMA_INTR(dma));
}
static void
le_dma_nocarrier(struct lance_softc *sc)
{
struct le_dma_softc *lesc = (struct le_dma_softc *)sc;
/*
* Check if the user has requested a certain cable type, and
* if so, honor that request.
*/
if (L64854_GCSR(lesc->sc_dma) & E_TP_AUI) {
switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) {
case IFM_10_5:
case IFM_AUTO:
if_printf(sc->sc_ifp, "lost carrier on UTP port, "
"switching to AUI port\n");
le_dma_setaui(sc);
}
} else {
switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) {
case IFM_10_T:
case IFM_AUTO:
if_printf(sc->sc_ifp, "lost carrier on AUI port, "
"switching to UTP port\n");
le_dma_setutp(sc);
}
}
}
static void
le_dma_dma_callback(void *xsc, bus_dma_segment_t *segs, int nsegs, int error)
{
struct le_dma_softc *lesc = (struct le_dma_softc *)xsc;
if (error != 0)
return;
KASSERT(nsegs == 1, ("%s: bad DMA segment count", __func__));
lesc->sc_laddr = segs[0].ds_addr;
}
static int
le_dma_probe(device_t dev)
{
if (strcmp(ofw_bus_get_name(dev), "le") == 0) {
device_set_desc(dev, "LANCE Ethernet");
return (BUS_PROBE_DEFAULT);
}
return (ENXIO);
}
static int
le_dma_attach(device_t dev)
{
struct le_dma_softc *lesc;
struct lsi64854_softc *dma;
struct lance_softc *sc;
int error;
lesc = device_get_softc(dev);
sc = &lesc->sc_am7990.lsc;
LE_LOCK_INIT(sc, device_get_nameunit(dev));
/*
* Establish link to `ledma' device.
* XXX hackery.
*/
dma = (struct lsi64854_softc *)device_get_softc(device_get_parent(dev));
lesc->sc_dma = dma;
lesc->sc_dma->sc_client = lesc;
lesc->sc_rrid = 0;
lesc->sc_rres = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&lesc->sc_rrid, RF_ACTIVE);
if (lesc->sc_rres == NULL) {
device_printf(dev, "cannot allocate registers\n");
error = ENXIO;
goto fail_mtx;
}
lesc->sc_regt = rman_get_bustag(lesc->sc_rres);
lesc->sc_regh = rman_get_bushandle(lesc->sc_rres);
lesc->sc_irid = 0;
if ((lesc->sc_ires = bus_alloc_resource_any(dev, SYS_RES_IRQ,
&lesc->sc_irid, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
device_printf(dev, "cannot allocate interrupt\n");
error = ENXIO;
goto fail_rres;
}
sc->sc_memsize = LEDMA_MEMSIZE;
error = bus_dma_tag_create(
dma->sc_parent_dmat, /* parent */
1, LEDMA_BOUNDARY, /* alignment, boundary */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
sc->sc_memsize, /* maxsize */
1, /* nsegments */
sc->sc_memsize, /* maxsegsize */
BUS_DMA_WAITOK, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&lesc->sc_dmat);
if (error != 0) {
device_printf(dev, "cannot allocate buffer DMA tag\n");
goto fail_ires;
}
error = bus_dmamem_alloc(lesc->sc_dmat, (void **)&sc->sc_mem,
BUS_DMA_WAITOK | BUS_DMA_COHERENT, &lesc->sc_dmam);
if (error != 0) {
device_printf(dev, "cannot allocate DMA buffer memory\n");
goto fail_dtag;
}
lesc->sc_laddr = 0;
error = bus_dmamap_load(lesc->sc_dmat, lesc->sc_dmam, sc->sc_mem,
sc->sc_memsize, le_dma_dma_callback, lesc, 0);
if (error != 0 || lesc->sc_laddr == 0) {
device_printf(dev, "cannot load DMA buffer map\n");
goto fail_dmem;
}
sc->sc_addr = lesc->sc_laddr & 0xffffff;
sc->sc_flags = 0;
sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON;
sc->sc_mediachange = le_dma_supmediachange;
sc->sc_mediastatus = le_dma_supmediastatus;
sc->sc_supmedia = le_dma_supmedia;
sc->sc_nsupmedia = sizeof(le_dma_supmedia) / sizeof(le_dma_supmedia[0]);
sc->sc_defaultmedia = le_dma_supmedia[0];
OF_getetheraddr(dev, sc->sc_enaddr);
sc->sc_copytodesc = lance_copytobuf_contig;
sc->sc_copyfromdesc = lance_copyfrombuf_contig;
sc->sc_copytobuf = lance_copytobuf_contig;
sc->sc_copyfrombuf = lance_copyfrombuf_contig;
sc->sc_zerobuf = lance_zerobuf_contig;
sc->sc_rdcsr = le_dma_rdcsr;
sc->sc_wrcsr = le_dma_wrcsr;
sc->sc_nocarrier = le_dma_nocarrier;
sc->sc_hwreset = le_dma_hwreset;
sc->sc_hwintr = le_dma_hwintr;
error = am7990_config(&lesc->sc_am7990, device_get_name(dev),
device_get_unit(dev));
if (error != 0) {
device_printf(dev, "cannot attach AM7990\n");
goto fail_dmap;
}
error = bus_setup_intr(dev, lesc->sc_ires, INTR_TYPE_NET | INTR_MPSAFE,
am7990_intr, sc, &lesc->sc_ih);
if (error != 0) {
device_printf(dev, "cannot set up interrupt\n");
goto fail_am7990;
}
return (0);
fail_am7990:
am7990_detach(&lesc->sc_am7990);
fail_dmap:
bus_dmamap_unload(lesc->sc_dmat, lesc->sc_dmam);
fail_dmem:
bus_dmamem_free(lesc->sc_dmat, sc->sc_mem, lesc->sc_dmam);
fail_dtag:
bus_dma_tag_destroy(lesc->sc_dmat);
fail_ires:
bus_release_resource(dev, SYS_RES_IRQ, lesc->sc_irid, lesc->sc_ires);
fail_rres:
bus_release_resource(dev, SYS_RES_MEMORY, lesc->sc_rrid, lesc->sc_rres);
fail_mtx:
LE_LOCK_DESTROY(sc);
return (error);
}
static int
le_dma_detach(device_t dev)
{
struct le_dma_softc *lesc;
struct lance_softc *sc;
lesc = device_get_softc(dev);
sc = &lesc->sc_am7990.lsc;
bus_teardown_intr(dev, lesc->sc_ires, lesc->sc_ih);
am7990_detach(&lesc->sc_am7990);
bus_dmamap_unload(lesc->sc_dmat, lesc->sc_dmam);
bus_dmamem_free(lesc->sc_dmat, sc->sc_mem, lesc->sc_dmam);
bus_dma_tag_destroy(lesc->sc_dmat);
bus_release_resource(dev, SYS_RES_IRQ, lesc->sc_irid, lesc->sc_ires);
bus_release_resource(dev, SYS_RES_MEMORY, lesc->sc_rrid, lesc->sc_rres);
LE_LOCK_DESTROY(sc);
return (0);
}
static int
le_dma_suspend(device_t dev)
{
struct le_dma_softc *lesc;
lesc = device_get_softc(dev);
lance_suspend(&lesc->sc_am7990.lsc);
return (0);
}
static int
le_dma_resume(device_t dev)
{
struct le_dma_softc *lesc;
lesc = device_get_softc(dev);
lance_resume(&lesc->sc_am7990.lsc);
return (0);
}