309 lines
8.1 KiB
C
309 lines
8.1 KiB
C
|
/* $NetBSD: wdsc.c,v 1.1 2001/08/19 03:16:22 wdk Exp $ */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright (c) 2001 Wayne Knowles
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
||
|
|
* by Wayne Knowles
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* TODO:
|
||
|
|
*
|
||
|
|
* Support for 2nd SCSI controller
|
||
|
|
* evcnt(9) hooks
|
||
|
|
* remove struct dma_chain
|
||
|
|
* dma{setup,stop,go} API similar to NCR93c9x MI driver
|
||
|
|
* improve hpcdma functions
|
||
|
|
* cleanup softc stuff
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <sys/param.h>
|
||
|
|
#include <sys/systm.h>
|
||
|
|
#include <sys/kernel.h>
|
||
|
|
#include <sys/device.h>
|
||
|
|
#include <sys/buf.h>
|
||
|
|
|
||
|
|
#include <dev/scsipi/scsi_all.h>
|
||
|
|
#include <dev/scsipi/scsipi_all.h>
|
||
|
|
#include <dev/scsipi/scsiconf.h>
|
||
|
|
|
||
|
|
#include <machine/cpu.h>
|
||
|
|
#include <machine/bus.h>
|
||
|
|
#include <machine/autoconf.h>
|
||
|
|
|
||
|
|
#include <sgimips/hpc/hpcvar.h>
|
||
|
|
#include <sgimips/hpc/hpcreg.h>
|
||
|
|
#include <sgimips/hpc/hpcdma.h>
|
||
|
|
|
||
|
|
#include <sgimips/hpc/sbicreg.h>
|
||
|
|
#include <sgimips/hpc/sbicvar.h>
|
||
|
|
|
||
|
|
struct wdsc_softc {
|
||
|
|
struct sbic_softc sc_sbic; /* Must be first */
|
||
|
|
|
||
|
|
struct hpc_dma_softc sc_hpcdma;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
void wdsc_attach __P((struct device *, struct device *, void *));
|
||
|
|
int wdsc_match __P((struct device *, struct cfdata *, void *));
|
||
|
|
|
||
|
|
struct cfattach wdsc_ca = {
|
||
|
|
sizeof(struct wdsc_softc), wdsc_match, wdsc_attach
|
||
|
|
};
|
||
|
|
|
||
|
|
extern struct cfdriver wdsc_cd;
|
||
|
|
|
||
|
|
void wdsc_enintr __P((struct sbic_softc *));
|
||
|
|
int wdsc_dmasetup __P((struct sbic_softc *, bus_dmamap_t, int));
|
||
|
|
int wdsc_dmago __P((struct sbic_softc *));
|
||
|
|
void wdsc_dmastop __P((struct sbic_softc *));
|
||
|
|
int wdsc_dmaintr __P((void *));
|
||
|
|
int wdsc_scsiintr __P((void *));
|
||
|
|
|
||
|
|
#define MAX_SCSI_XFER (512*1024)
|
||
|
|
#define MAX_SEG_SZ 8192
|
||
|
|
#define MAX_DMA_SZ MAX_SCSI_XFER
|
||
|
|
#define DMA_SEGS (MAX_DMA_SZ/MAX_SEG_SZ)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Match for SCSI devices on the onboard WD33C93 chip
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
wdsc_match(pdp, cf, auxp)
|
||
|
|
struct device *pdp;
|
||
|
|
struct cfdata *cf;
|
||
|
|
void *auxp;
|
||
|
|
{
|
||
|
|
struct hpc_attach_args *haa = auxp;
|
||
|
|
|
||
|
|
if (strcmp(haa->ha_name, wdsc_cd.cd_name))
|
||
|
|
return (0);
|
||
|
|
return (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Attach the wdsc driver
|
||
|
|
*/
|
||
|
|
void
|
||
|
|
wdsc_attach(pdp, dp, auxp)
|
||
|
|
struct device *pdp, *dp;
|
||
|
|
void *auxp;
|
||
|
|
{
|
||
|
|
struct sbic_softc *sc = (void *)dp;
|
||
|
|
struct wdsc_softc *wdsc = (void *)dp;
|
||
|
|
struct hpc_attach_args *haa = auxp;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
sc->sc_regt = haa->ha_iot;
|
||
|
|
sc->sc_dmat = haa->ha_dmat;
|
||
|
|
|
||
|
|
if ((err = bus_space_subregion(haa->ha_iot, haa->ha_ioh,
|
||
|
|
HPC_SCSI0_DEVREGS,
|
||
|
|
HPC_SCSI0_DEVREGS_SIZE,
|
||
|
|
&sc->sc_regh)) != 0) {
|
||
|
|
printf(": unable to map WD33C93 regs, err=%d\n", err);
|
||
|
|
goto fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (bus_dmamap_create(sc->sc_dmat, MAX_DMA_SZ,
|
||
|
|
DMA_SEGS, MAX_SEG_SZ, MAX_SEG_SZ,
|
||
|
|
BUS_DMA_WAITOK,
|
||
|
|
&sc->sc_dmamap) != 0) {
|
||
|
|
printf(": failed to create dmamap\n");
|
||
|
|
goto fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
hpcdma_init(haa, &wdsc->sc_hpcdma, DMA_SEGS);
|
||
|
|
|
||
|
|
sc->sc_enintr = wdsc_enintr;
|
||
|
|
sc->sc_dmasetup = wdsc_dmasetup;
|
||
|
|
sc->sc_dmago = wdsc_dmago;
|
||
|
|
sc->sc_dmastop = wdsc_dmastop;
|
||
|
|
|
||
|
|
sc->sc_adapter.adapt_dev = &sc->sc_dev;
|
||
|
|
sc->sc_adapter.adapt_nchannels = 1;
|
||
|
|
sc->sc_adapter.adapt_openings = 7;
|
||
|
|
sc->sc_adapter.adapt_max_periph = 1;
|
||
|
|
sc->sc_adapter.adapt_ioctl = NULL;
|
||
|
|
sc->sc_adapter.adapt_minphys = minphys;
|
||
|
|
sc->sc_adapter.adapt_request = sbic_scsi_request;
|
||
|
|
sc->sc_channel.chan_adapter = &sc->sc_adapter;
|
||
|
|
sc->sc_channel.chan_bustype = &scsi_bustype;
|
||
|
|
sc->sc_channel.chan_channel = 0;
|
||
|
|
sc->sc_channel.chan_ntargets = 8;
|
||
|
|
sc->sc_channel.chan_nluns = 8;
|
||
|
|
sc->sc_channel.chan_id = 7;
|
||
|
|
|
||
|
|
printf(": WD33C93 SCSI, target %d\n", sc->sc_channel.chan_id);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Controller clock frequency * 10
|
||
|
|
*/
|
||
|
|
sc->sc_clkfreq = 200;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Initialise the hardware
|
||
|
|
*/
|
||
|
|
sbicinit(sc);
|
||
|
|
|
||
|
|
/* XXX: 1 = IRQ_LOCAL0 + 1 */
|
||
|
|
if ((cpu_intr_establish(1, IPL_BIO, wdsc_scsiintr, sc)) == NULL) {
|
||
|
|
printf(": unable to establish interrupt!\n");
|
||
|
|
goto fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
(void)config_found(dp, &sc->sc_channel, scsiprint);
|
||
|
|
|
||
|
|
fail:
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Enable DMA interrupts
|
||
|
|
*/
|
||
|
|
void
|
||
|
|
wdsc_enintr(dev)
|
||
|
|
struct sbic_softc *dev;
|
||
|
|
{
|
||
|
|
dev->sc_flags |= SBICF_INTR;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Prime the hardware for a DMA transfer
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
wdsc_dmasetup(dev, dmamap, flags)
|
||
|
|
struct sbic_softc *dev;
|
||
|
|
bus_dmamap_t dmamap;
|
||
|
|
int flags;
|
||
|
|
{
|
||
|
|
struct hpc_dma_softc *dsc = &((struct wdsc_softc *)dev)->sc_hpcdma;
|
||
|
|
struct sbic_acb *acb = dev->sc_nexus;
|
||
|
|
int s;
|
||
|
|
int count, err;
|
||
|
|
void *vaddr;
|
||
|
|
|
||
|
|
KASSERT((dsc->sc_flags & HPC_DMA_ACTIVE) == 0);
|
||
|
|
|
||
|
|
vaddr = acb->sc_kv.dc_addr;
|
||
|
|
count = acb->sc_kv.dc_count;
|
||
|
|
|
||
|
|
if (count) {
|
||
|
|
s = splbio();
|
||
|
|
|
||
|
|
/* have dmamap for the transfering addresses */
|
||
|
|
if ((err=bus_dmamap_load(dev->sc_dmat, dev->sc_dmamap,
|
||
|
|
vaddr, count,
|
||
|
|
NULL /* kernel address */,
|
||
|
|
BUS_DMA_NOWAIT)) != 0)
|
||
|
|
panic("%s: bus_dmamap_load err=%d",
|
||
|
|
dev->sc_dev.dv_xname, err);
|
||
|
|
|
||
|
|
dev->sc_flags |= SBICF_DMALOADED; /* XXX - Move to MD */
|
||
|
|
dev->sc_flags |= SBICF_INTR;
|
||
|
|
|
||
|
|
hpcdma_sglist_create(dsc, dev->sc_dmamap);
|
||
|
|
|
||
|
|
dsc->sc_dmacmd = HPC_DMACTL_ACTIVE; /* XXX - remove tests in MI */
|
||
|
|
if (flags & ACB_DATAIN) {
|
||
|
|
dsc->sc_flags |= HPC_DMA_READ;
|
||
|
|
} else {
|
||
|
|
dsc->sc_dmacmd |= HPC_DMACTL_DIR;
|
||
|
|
dsc->sc_flags &= ~HPC_DMA_READ;
|
||
|
|
}
|
||
|
|
splx(s);
|
||
|
|
}
|
||
|
|
return(count);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Prime the hardware for the next DMA transfer
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
wdsc_dmago(dev)
|
||
|
|
struct sbic_softc *dev;
|
||
|
|
{
|
||
|
|
struct hpc_dma_softc *dsc = &((struct wdsc_softc *)dev)->sc_hpcdma;
|
||
|
|
|
||
|
|
if (dev->sc_tcnt == 0) {
|
||
|
|
return(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
KASSERT((dsc->sc_flags & HPC_DMA_ACTIVE) == 0);
|
||
|
|
dsc->sc_flags |= HPC_DMA_ACTIVE;
|
||
|
|
|
||
|
|
bus_dmamap_sync(dev->sc_dmat, dev->sc_dmamap, 0, dev->sc_tcnt,
|
||
|
|
BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
|
||
|
|
|
||
|
|
hpcdma_cntl(dsc, dsc->sc_dmacmd); /* Thunderbirds are go! */
|
||
|
|
|
||
|
|
return(dev->sc_dmamap->dm_mapsize);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Stop DMA, and disable interrupts
|
||
|
|
*/
|
||
|
|
void
|
||
|
|
wdsc_dmastop(dev)
|
||
|
|
struct sbic_softc *dev;
|
||
|
|
{
|
||
|
|
struct hpc_dma_softc *dsc = &((struct wdsc_softc *)dev)->sc_hpcdma;
|
||
|
|
|
||
|
|
if (dsc->sc_flags & HPC_DMA_ACTIVE) {
|
||
|
|
if (dsc->sc_flags & HPC_DMA_READ)
|
||
|
|
hpcdma_flush(dsc);
|
||
|
|
hpcdma_cntl(dsc, 0); /* Stop DMA */
|
||
|
|
bus_dmamap_sync(dev->sc_dmat, dev->sc_dmamap, 0,
|
||
|
|
dev->sc_dmamap->dm_mapsize,
|
||
|
|
BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
|
||
|
|
dsc->sc_flags &= ~HPC_DMA_ACTIVE;
|
||
|
|
}
|
||
|
|
if (dev->sc_flags & SBICF_DMALOADED)
|
||
|
|
bus_dmamap_unload(dev->sc_dmat, dev->sc_dmamap);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* SCSI controller interrupt
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
wdsc_scsiintr(arg)
|
||
|
|
void *arg;
|
||
|
|
{
|
||
|
|
struct sbic_softc *dev = arg;
|
||
|
|
int found;
|
||
|
|
|
||
|
|
found = sbicintr(dev);
|
||
|
|
return(found);
|
||
|
|
}
|