341 lines
9.1 KiB
C
341 lines
9.1 KiB
C
/* $NetBSD: kdb.c,v 1.17 2000/03/26 11:45:04 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>
|
|
|
|
#ifdef __vax__
|
|
#include <machine/pte.h>
|
|
#include <machine/pcb.h>
|
|
#endif
|
|
#include <machine/bus.h>
|
|
|
|
#include <dev/bi/bireg.h>
|
|
#include <dev/bi/bivar.h>
|
|
#include <dev/bi/kdbreg.h>
|
|
|
|
#include <dev/mscp/mscp.h>
|
|
#include <dev/mscp/mscpreg.h>
|
|
#include <dev/mscp/mscpvar.h>
|
|
|
|
#include "locators.h"
|
|
|
|
#define KDB_WL(adr, val) bus_space_write_4(sc->sc_iot, sc->sc_ioh, adr, val)
|
|
#define KDB_RL(adr) bus_space_read_4(sc->sc_iot, sc->sc_ioh, adr)
|
|
#define KDB_RS(adr) bus_space_read_2(sc->sc_iot, sc->sc_ioh, adr)
|
|
|
|
#define b_forw b_hash.le_next
|
|
/*
|
|
* Software status, per controller.
|
|
*/
|
|
struct kdb_softc {
|
|
struct device sc_dev; /* Autoconfig info */
|
|
caddr_t sc_kdb; /* Struct for kdb communication */
|
|
struct mscp_softc *sc_softc; /* MSCP info (per mscpvar.h) */
|
|
bus_dma_tag_t sc_dmat;
|
|
bus_dmamap_t sc_cmap; /* Control structures */
|
|
bus_space_tag_t sc_iot;
|
|
bus_space_handle_t sc_ioh;
|
|
};
|
|
|
|
int kdbmatch __P((struct device *, struct cfdata *, void *));
|
|
void kdbattach __P((struct device *, struct device *, void *));
|
|
void kdbreset __P((int));
|
|
void kdbintr __P((void *));
|
|
void kdbctlrdone __P((struct device *));
|
|
int kdbprint __P((void *, const char *));
|
|
void kdbsaerror __P((struct device *, int));
|
|
void kdbgo __P((struct device *, struct mscp_xi *));
|
|
|
|
struct cfattach kdb_ca = {
|
|
sizeof(struct kdb_softc), kdbmatch, kdbattach
|
|
};
|
|
|
|
/*
|
|
* 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 (bus_space_read_2(ba->ba_iot, ba->ba_ioh, BIREG_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;
|
|
volatile int i = 10000;
|
|
int error, rseg;
|
|
bus_dma_segment_t seg;
|
|
|
|
printf("\n");
|
|
bi_intr_establish(ba->ba_icookie, ba->ba_ivec, kdbintr, sc);
|
|
|
|
sc->sc_iot = ba->ba_iot;
|
|
sc->sc_ioh = ba->ba_ioh;
|
|
sc->sc_dmat = ba->ba_dmat;
|
|
|
|
/*
|
|
* Map the communication area and command and
|
|
* response packets into Unibus space.
|
|
*/
|
|
if ((error = bus_dmamem_alloc(sc->sc_dmat, sizeof(struct mscp_pack),
|
|
NBPG, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) {
|
|
printf("Alloc ctrl area %d\n", error);
|
|
return;
|
|
}
|
|
if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg,
|
|
sizeof(struct mscp_pack), &sc->sc_kdb,
|
|
BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) {
|
|
printf("Map ctrl area %d\n", error);
|
|
err: bus_dmamem_free(sc->sc_dmat, &seg, rseg);
|
|
return;
|
|
}
|
|
if ((error = bus_dmamap_create(sc->sc_dmat, sizeof(struct mscp_pack),
|
|
1, sizeof(struct mscp_pack), 0, BUS_DMA_NOWAIT, &sc->sc_cmap))) {
|
|
printf("Create DMA map %d\n", error);
|
|
err2: bus_dmamem_unmap(sc->sc_dmat, sc->sc_kdb,
|
|
sizeof(struct mscp_pack));
|
|
goto err;
|
|
}
|
|
if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_cmap,
|
|
sc->sc_kdb, sizeof(struct mscp_pack), 0, BUS_DMA_NOWAIT))) {
|
|
printf("Load ctrl map %d\n", error);
|
|
bus_dmamap_destroy(sc->sc_dmat, sc->sc_cmap);
|
|
goto err2;
|
|
}
|
|
bzero(sc->sc_kdb, sizeof(struct mscp_pack));
|
|
|
|
ma.ma_mc = &kdb_mscp_ctlr;
|
|
ma.ma_type = MSCPBUS_DISK|MSCPBUS_KDB;
|
|
ma.ma_uda = (struct mscp_pack *)sc->sc_kdb;
|
|
ma.ma_softc = &sc->sc_softc;
|
|
ma.ma_iot = sc->sc_iot;
|
|
ma.ma_iph = sc->sc_ioh + KDB_IP;
|
|
ma.ma_sah = sc->sc_ioh + KDB_SA;
|
|
ma.ma_swh = sc->sc_ioh + KDB_SW;
|
|
ma.ma_dmat = sc->sc_dmat;
|
|
ma.ma_dmam = sc->sc_cmap;
|
|
ma.ma_ivec = ba->ba_ivec;
|
|
ma.ma_ctlrnr = ba->ba_nodenr;
|
|
ma.ma_adapnr = ba->ba_busnr;
|
|
|
|
KDB_WL(BIREG_VAXBICSR, KDB_RL(BIREG_VAXBICSR) | BICSR_NRST);
|
|
while (i--) /* Need delay??? */
|
|
;
|
|
KDB_WL(BIREG_INTRDES, ba->ba_intcpu); /* Interrupt on CPU # */
|
|
KDB_WL(BIREG_BCICSR, KDB_RL(BIREG_BCICSR) |
|
|
BCI_STOPEN | BCI_IDENTEN | BCI_UINTEN | BCI_INTEN);
|
|
KDB_WL(BIREG_UINTRCSR, ba->ba_ivec);
|
|
config_found(&sc->sc_dev, &ma, kdbprint);
|
|
}
|
|
|
|
void
|
|
kdbgo(usc, mxi)
|
|
struct device *usc;
|
|
struct mscp_xi *mxi;
|
|
{
|
|
struct kdb_softc *sc = (void *)usc;
|
|
struct buf *bp = mxi->mxi_bp;
|
|
struct mscp *mp = mxi->mxi_mp;
|
|
u_int32_t addr = (u_int32_t)bp->b_un.b_addr;
|
|
u_int32_t mapaddr;
|
|
int err;
|
|
|
|
/*
|
|
* The KDB50 wants to read VAX Page tables directly, therefore
|
|
* the result from bus_dmamap_load() is uninteresting. (But it
|
|
* should never fail!).
|
|
*
|
|
* On VAX, point to the corresponding page tables. (user/sys)
|
|
* On other systems, do something else...
|
|
*/
|
|
err = bus_dmamap_load(sc->sc_dmat, mxi->mxi_dmam, bp->b_un.b_addr,
|
|
bp->b_bcount, bp->b_proc, BUS_DMA_NOWAIT);
|
|
|
|
if (err) /* Shouldn't happen */
|
|
panic("kdbgo: bus_dmamap_load: error %d", err);
|
|
|
|
#ifdef __vax__
|
|
/*
|
|
* 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) {
|
|
mapaddr = ((u_int32_t)kvtopte(addr)) & ~KERNBASE;
|
|
} else {
|
|
struct pcb *pcb;
|
|
u_int32_t eaddr;
|
|
|
|
/*
|
|
* We check if the PTE's needed crosses a page boundary.
|
|
* If they do; only transfer the amount of data that is
|
|
* mapped by the first PTE page and led the system handle
|
|
* the rest of the data.
|
|
*/
|
|
pcb = &bp->b_proc->p_addr->u_pcb;
|
|
mapaddr = (u_int32_t)uvtopte(addr, pcb);
|
|
eaddr = (u_int32_t)uvtopte(addr + (bp->b_bcount - 1), pcb);
|
|
if (trunc_page(mapaddr) != trunc_page(eaddr)) {
|
|
mp->mscp_seq.seq_bytecount =
|
|
(((round_page(mapaddr) - mapaddr)/4) * 512);
|
|
}
|
|
mapaddr = kvtophys(mapaddr);
|
|
}
|
|
#else
|
|
#error Must write code to handle KDB50 on non-vax.
|
|
#endif
|
|
|
|
mp->mscp_seq.seq_mapbase = mapaddr;
|
|
mxi->mxi_dmam->dm_segs[0].ds_addr = (addr & 511) | KDB_MAP;
|
|
mscp_dgo(sc->sc_softc, mxi);
|
|
}
|
|
|
|
void
|
|
kdbsaerror(usc, doreset)
|
|
struct device *usc;
|
|
int doreset;
|
|
{
|
|
struct kdb_softc *sc = (void *)usc;
|
|
|
|
if ((KDB_RS(KDB_SA) & MP_ERR) == 0)
|
|
return;
|
|
printf("%s: controller error, sa=0x%x\n", sc->sc_dev.dv_xname,
|
|
KDB_RS(KDB_SA));
|
|
/* 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(void *arg)
|
|
{
|
|
struct kdb_softc *sc = arg;
|
|
|
|
if (KDB_RS(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;
|
|
{
|
|
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)
|
|
struct device *usc;
|
|
{
|
|
}
|