NetBSD/sys/arch/vax/bi/kdb.c

321 lines
8.2 KiB
C

/* $NetBSD: kdb.c,v 1.12 1998/03/02 17:03:12 ragge Exp $ */
/*
* Copyright (c) 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.
*/
/*
* KDB50 disk device driver
*/
/*
* TODO
* Implement node reset routine.
* Nices hardware error handling.
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <vm/vm.h>
#include <vm/vm_kern.h>
#include <machine/sid.h>
#include <machine/pte.h>
#include <machine/pcb.h>
#include <machine/trap.h>
#include <machine/scb.h>
#include <vax/bi/bireg.h>
#include <vax/bi/bivar.h>
#include <vax/bi/kdbreg.h>
#include <vax/mscp/mscp.h>
#include <vax/mscp/mscpvar.h>
#include <vax/mscp/mscpreg.h>
#include "locators.h"
#define b_forw b_hash.le_next
/*
* Software status, per controller.
*/
struct kdb_softc {
struct device sc_dev; /* Autoconfig info */
struct ivec_dsp sc_ivec; /* Interrupt vector handler */
struct mscp_pack sc_kdb; /* Struct for kdb communication */
struct mscp_softc *sc_softc; /* MSCP info (per mscpvar.h) */
struct kdb_regs *sc_kr; /* KDB controller registers */
struct mscp *sc_mscp; /* Keep pointer to active mscp */
};
int kdbmatch __P((struct device *, struct cfdata *, void *));
void kdbattach __P((struct device *, struct device *, void *));
void kdbreset __P((int));
void kdbintr __P((int));
void kdbctlrdone __P((struct device *, int));
int kdbprint __P((void *, const char *));
void kdbsaerror __P((struct device *, int));
int kdbgo __P((struct device *, struct buf *));
struct cfattach kdb_ca = {
sizeof(struct kdb_softc), kdbmatch, kdbattach
};
extern struct cfdriver kdb_cd;
/*
* More driver definitions, for generic MSCP code.
*/
struct mscp_ctlr kdb_mscp_ctlr = {
kdbctlrdone,
kdbgo,
kdbsaerror,
};
int
kdbprint(aux, name)
void *aux;
const char *name;
{
if (name)
printf("%s: mscpbus", name);
return UNCONF;
}
/*
* Poke at a supposed KDB to see if it is there.
*/
int
kdbmatch(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct bi_attach_args *ba = aux;
if (ba->ba_node->biic.bi_dtype != BIDT_KDB50)
return 0;
if (cf->cf_loc[BICF_NODE] != BICF_NODE_DEFAULT &&
cf->cf_loc[BICF_NODE] != ba->ba_nodenr)
return 0;
return 1;
}
void
kdbattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct kdb_softc *sc = (void *)self;
struct bi_attach_args *ba = aux;
struct mscp_attach_args ma;
extern struct ivec_dsp idsptch;
volatile int i = 10000;
printf("\n");
bcopy(&idsptch, &sc->sc_ivec, sizeof(struct ivec_dsp));
scb->scb_nexvec[1][ba->ba_nodenr] = &sc->sc_ivec;
sc->sc_ivec.hoppaddr = kdbintr;
sc->sc_ivec.pushlarg = self->dv_unit;
sc->sc_kr = (void *)ba->ba_node;
bzero(&sc->sc_kdb, sizeof (struct mscp_pack));
ma.ma_mc = &kdb_mscp_ctlr;
ma.ma_type = MSCPBUS_DISK|MSCPBUS_KDB;
ma.ma_uuda = (struct mscp_pack *)kvtophys(&sc->sc_kdb);
ma.ma_uda = &sc->sc_kdb;
ma.ma_ip = &sc->sc_kr->kdb_ip;
ma.ma_sa = &sc->sc_kr->kdb_sa;
ma.ma_sw = &sc->sc_kr->kdb_sw;
ma.ma_softc = &sc->sc_softc;
ma.ma_ivec = (int)&scb->scb_nexvec[1][ba->ba_nodenr] - (int)scb;
ma.ma_ctlrnr = ba->ba_nodenr;
sc->sc_kr->kdb_bi.bi_csr |= BICSR_NRST;
while (i--) /* Need delay??? */
;
sc->sc_kr->kdb_bi.bi_intrdes = ba->ba_intcpu;
sc->sc_kr->kdb_bi.bi_bcicsr |= BCI_STOPEN | BCI_IDENTEN | BCI_UINTEN |
BCI_INTEN;
sc->sc_kr->kdb_bi.bi_uintrcsr = ma.ma_ivec;
config_found(&sc->sc_dev, &ma, kdbprint);
}
int
kdbgo(usc, bp)
struct device *usc;
struct buf *bp;
{
struct kdb_softc *sc = (void *)usc;
struct mscp_softc *mi = sc->sc_softc;
struct mscp *mp = (void *)bp->b_actb;
struct pcb *pcb;
pt_entry_t *pte;
int npf, o, i;
unsigned info = 0;
caddr_t addr;
o = (int)bp->b_un.b_addr & PGOFSET;
npf = btoc(bp->b_bcount + o) + 1;
addr = bp->b_un.b_addr;
/*
* Get a pointer to the pte pointing out the first virtual address.
* Use different ways in kernel and user space.
*/
if ((bp->b_flags & B_PHYS) == 0) {
pte = kvtopte(addr);
} else {
pcb = &bp->b_proc->p_addr->u_pcb;
pte = uvtopte(addr, pcb);
}
/*
* When we are doing DMA to user space, be sure that all pages
* we want to transfer to is mapped. WHY DO WE NEED THIS???
* SHOULDN'T THEY ALWAYS BE MAPPED WHEN DOING THIS???
*/
for (i = 0; i < (npf - 1); i++) {
if ((pte + i)->pg_pfn == 0) {
int rv;
#if defined(UVM)
rv = uvm_fault(&bp->b_proc->p_vmspace->vm_map,
(unsigned)addr + i * NBPG, 0,
VM_PROT_READ|VM_PROT_WRITE);
#else
rv = vm_fault(&bp->b_proc->p_vmspace->vm_map,
(unsigned)addr + i * NBPG,
VM_PROT_READ|VM_PROT_WRITE, FALSE);
#endif
if (rv)
panic("KDB DMA to nonexistent page, %d", rv);
}
}
/*
* pte's for userspace isn't necessary positioned
* in consecutive physical pages. We check if they
* are, otherwise we need to copy the pte's to a
* physically contigouos page area.
* XXX some copying here may be unneccessary. Subject to fix.
*/
if (bp->b_flags & B_PHYS) {
int i = kvtophys(pte);
unsigned k;
if (trunc_page(i) != trunc_page(kvtophys(pte) + npf * 4)) {
info = (unsigned)malloc(2 * NBPG, M_DEVBUF, M_WAITOK);
k = (info + PGOFSET) & ~PGOFSET;
bcopy(pte, (void *)k, NBPG);
i = kvtophys(k);
}
mp->mscp_seq.seq_mapbase = i;
} else
mp->mscp_seq.seq_mapbase = (unsigned)pte;
mscp_dgo(mi, KDB_MAP | o, info, bp);
return 1;
}
void
kdbsaerror(usc, doreset)
struct device *usc;
int doreset;
{
struct kdb_softc *sc = (void *)usc;
register int code = sc->sc_kr->kdb_sa;
if ((code & MP_ERR) == 0)
return;
printf("%s: controller error, sa=0x%x\n", sc->sc_dev.dv_xname, code);
/* What to do now??? */
}
/*
* Interrupt routine. Depending on the state of the controller,
* continue initialisation, or acknowledge command and response
* interrupts, and process responses.
*/
void
kdbintr(ctlr)
int ctlr;
{
struct kdb_softc *sc = kdb_cd.cd_devs[ctlr];
if (sc->sc_kr->kdb_sa & MP_ERR) { /* ctlr fatal error */
kdbsaerror(&sc->sc_dev, 1);
return;
}
mscp_intr(sc->sc_softc);
}
#ifdef notyet
/*
* The KDB50 has been reset. Reinitialise the controller
* and requeue outstanding I/O.
*/
void
kdbreset(ctlr)
int ctlr;
{
register struct kdb_softc *sc;
sc = kdb_cd.cd_devs[ctlr];
printf(" kdb%d", ctlr);
/* reset queues and requeue pending transfers */
mscp_requeue(sc->sc_softc);
/*
* If it fails to initialise we will notice later and
* try again (and again...). Do not call kdbstart()
* here; it will be done after the controller finishes
* initialisation.
*/
if (kdbinit(sc))
printf(" (hung)");
}
#endif
void
kdbctlrdone(usc, info)
struct device *usc;
int info;
{
if (info)
free((void *)info, NBPG * 2);
}