NetBSD-5.0.2/sys/arch/vax/mba/mba.c
/* $NetBSD: mba.c,v 1.37 2008/10/16 12:47:22 hans Exp $ */
/*
* Copyright (c) 1994, 1996 Ludd, University of Lule}, Sweden.
* 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. 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 at Ludd, University of
* Lule}, Sweden and its contributors.
* 4. 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.
*/
/*
* Simple massbus drive routine.
* TODO:
* Autoconfig new devices 'on the fly'.
* More intelligent way to handle different interrupts.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mba.c,v 1.37 2008/10/16 12:47:22 hans Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/queue.h>
#include <sys/buf.h>
#include <sys/bufq.h>
#include <sys/proc.h>
#include <uvm/uvm_extern.h>
#include <machine/bus.h>
#include <machine/scb.h>
#include <machine/nexus.h>
#include <machine/pte.h>
#include <machine/pcb.h>
#include <machine/sid.h>
#include <machine/cpu.h>
#include <vax/mba/mbareg.h>
#include <vax/mba/mbavar.h>
#include "locators.h"
const struct mbaunit mbaunit[] = {
{MBADT_RP04, "rp04", MB_RP},
{MBADT_RP05, "rp05", MB_RP},
{MBADT_RP06, "rp06", MB_RP},
{MBADT_RP07, "rp07", MB_RP},
{MBADT_RM02, "rm02", MB_RP},
{MBADT_RM03, "rm03", MB_RP},
{MBADT_RM05, "rm05", MB_RP},
{MBADT_RM80, "rm80", MB_RP},
{0, 0, 0}
};
void mbaqueue(struct mba_device *);
static int mbamatch(device_t, cfdata_t, void *);
static void mbaattach(device_t, device_t, void *);
static void mbaintr(void *);
static int mbaprint(void *, const char *);
static void mbastart(struct mba_softc *);
CFATTACH_DECL_NEW(mba_cmi, sizeof(struct mba_softc),
mbamatch, mbaattach, NULL, NULL);
CFATTACH_DECL_NEW(mba_sbi, sizeof(struct mba_softc),
mbamatch, mbaattach, NULL, NULL);
#define MBA_WCSR(reg, val) \
bus_space_write_4(sc->sc_iot, sc->sc_ioh, (reg), (val))
#define MBA_RCSR(reg) \
bus_space_read_4(sc->sc_iot, sc->sc_ioh, (reg))
/*
* Look if this is a massbuss adapter.
*/
int
mbamatch(device_t parent, cfdata_t cf, void *aux)
{
struct sbi_attach_args * const sa = aux;
if (vax_cputype == VAX_750) {
if (cf->cf_loc[CMICF_TR] != CMICF_TR_DEFAULT &&
cf->cf_loc[CMICF_TR] != sa->sa_nexnum)
return 0;
} else {
if (cf->cf_loc[SBICF_TR] != SBICF_TR_DEFAULT &&
cf->cf_loc[SBICF_TR] != sa->sa_nexnum)
return 0;
}
if (sa->sa_type == NEX_MBA)
return 1;
return 0;
}
/*
* Attach the found massbuss adapter. Setup its interrupt vectors,
* reset it and go searching for drives on it.
*/
void
mbaattach(device_t parent, device_t self, void *aux)
{
struct mba_softc * const sc = device_private(self);
struct sbi_attach_args * const sa = aux;
struct mba_attach_args ma;
int i, j;
aprint_normal("\n");
sc->sc_dev = self;
sc->sc_iot = sa->sa_iot;
sc->sc_ioh = sa->sa_ioh;
/*
* Set up interrupt vectors for this MBA.
*/
for (i = 0x14; i < 0x18; i++)
scb_vecalloc(vecnum(0, i, sa->sa_nexnum),
mbaintr, sc, SCB_ISTACK, &sc->sc_intrcnt);
evcnt_attach_dynamic(&sc->sc_intrcnt, EVCNT_TYPE_INTR, NULL,
device_xname(self), "intr");
STAILQ_INIT(&sc->sc_xfers);
MBA_WCSR(MBA_CR, MBACR_INIT); /* Reset adapter */
MBA_WCSR(MBA_CR, MBACR_IE); /* Enable interrupts */
for (i = 0; i < MAXMBADEV; i++) {
sc->sc_state = SC_AUTOCONF;
if ((MBA_RCSR(MUREG(i, MU_DS)) & MBADS_DPR) == 0)
continue;
/* We have a drive, ok. */
ma.ma_unit = i;
ma.ma_type = MBA_RCSR(MUREG(i, MU_DT)) & 0xf1ff;
for (j = 0; mbaunit[j].nr; j++)
if (mbaunit[j].nr == ma.ma_type)
break;
ma.ma_devtyp = mbaunit[j].devtyp;
ma.ma_name = mbaunit[j].name;
ma.ma_iot = sc->sc_iot;
ma.ma_ioh = sc->sc_ioh + MUREG(i, 0);
config_found(sc->sc_dev, &ma, mbaprint);
}
}
/*
* We got an interrupt. Check type of interrupt and call the specific
* device interrupt handling routine.
*/
void
mbaintr(void *mba)
{
struct mba_softc * const sc = mba;
struct mba_device *md;
struct buf *bp;
int itype, attn, anr;
itype = MBA_RCSR(MBA_SR);
MBA_WCSR(MBA_SR, itype);
attn = MBA_RCSR(MUREG(0, MU_AS)) & 0xff;
MBA_WCSR(MUREG(0, MU_AS), attn);
if (sc->sc_state == SC_AUTOCONF)
return; /* During autoconfig */
md = STAILQ_FIRST(&sc->sc_xfers);
bp = BUFQ_PEEK(md->md_q);
/*
* A data-transfer interrupt. Current operation is finished,
* call that device's finish routine to see what to do next.
*/
if (sc->sc_state == SC_ACTIVE) {
sc->sc_state = SC_IDLE;
switch ((*md->md_finish)(md, itype, &attn)) {
case XFER_FINISH:
/*
* Transfer is finished. Take buffer of drive
* queue, and take drive of adapter queue.
* If more to transfer, start the adapter again
* by calling mbastart().
*/
(void)BUFQ_GET(md->md_q);
STAILQ_REMOVE_HEAD(&sc->sc_xfers, md_link);
if (BUFQ_PEEK(md->md_q) != NULL) {
STAILQ_INSERT_TAIL(&sc->sc_xfers, md, md_link);
}
bp->b_resid = 0;
biodone(bp);
if (!STAILQ_EMPTY(&sc->sc_xfers))
mbastart(sc);
break;
case XFER_RESTART:
/*
* Something went wrong with the transfer. Try again.
*/
mbastart(sc);
break;
}
}
while (attn) {
anr = ffs(attn) - 1;
attn &= ~(1 << anr);
if (sc->sc_md[anr]->md_attn == 0)
panic("Should check for new MBA device %d", anr);
(*sc->sc_md[anr]->md_attn)(sc->sc_md[anr]);
}
}
int
mbaprint(void *aux, const char *mbaname)
{
struct mba_attach_args * const ma = aux;
if (mbaname) {
if (ma->ma_name)
aprint_normal("%s", ma->ma_name);
else
aprint_normal("device type %o", ma->ma_type);
aprint_normal(" at %s", mbaname);
}
aprint_normal(" drive %d", ma->ma_unit);
return (ma->ma_name ? UNCONF : UNSUPP);
}
/*
* A device calls mbaqueue() when it wants to get on the adapter queue.
* Called at splbio(). If the adapter is inactive, start it.
*/
void
mbaqueue(struct mba_device *md)
{
struct mba_softc * const sc = md->md_mba;
bool was_empty = STAILQ_EMPTY(&sc->sc_xfers);
STAILQ_INSERT_TAIL(&sc->sc_xfers, md, md_link);
if (was_empty)
mbastart(sc);
}
/*
* Start activity on (idling) adapter. Calls disk_reallymapin() to setup
* for DMA transfer, then the unit-specific start routine.
*/
void
mbastart(struct mba_softc *sc)
{
struct mba_device * const md = STAILQ_FIRST(&sc->sc_xfers);
struct buf *bp = BUFQ_PEEK(md->md_q);
disk_reallymapin(bp, (void *)(sc->sc_ioh + MAPREG(0)), 0, PG_V);
sc->sc_state = SC_ACTIVE;
MBA_WCSR(MBA_VAR, ((u_int)bp->b_data & VAX_PGOFSET));
MBA_WCSR(MBA_BC, (~bp->b_bcount) + 1);
(*md->md_start)(md); /* machine-dependent start */
}