NetBSD-5.0.2/sys/arch/vax/vsa/vsbus.c
/* $NetBSD: vsbus.c,v 1.54 2008/03/11 05:34:03 matt Exp $ */
/*
* Copyright (c) 1996, 1999 Ludd, University of Lule}, Sweden.
* All rights reserved.
*
* This code is derived from software contributed to Ludd by Bertram Barth.
*
* 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: vsbus.c,v 1.54 2008/03/11 05:34:03 matt Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/syslog.h>
#include <sys/stat.h>
#include <uvm/uvm_extern.h>
#define _VAX_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <machine/pte.h>
#include <machine/sid.h>
#include <machine/scb.h>
#include <machine/cpu.h>
#include <machine/trap.h>
#include <machine/nexus.h>
#include <machine/uvax.h>
#include <machine/ka410.h>
#include <machine/ka420.h>
#include <machine/ka43.h>
#include <machine/mainbus.h>
#include <machine/vsbus.h>
#include "ioconf.h"
#include "locators.h"
#include "opt_cputype.h"
static int vsbus_match(device_t, cfdata_t, void *);
static void vsbus_attach(device_t, device_t, void *);
static int vsbus_print(void *, const char *);
static int vsbus_search(device_t, cfdata_t, const int *, void *);
static SIMPLEQ_HEAD(, vsbus_dma) vsbus_dma;
CFATTACH_DECL_NEW(vsbus, sizeof(struct vsbus_softc),
vsbus_match, vsbus_attach, NULL, NULL);
static struct vax_bus_dma_tag vsbus_bus_dma_tag = {
._dmamap_create = _bus_dmamap_create,
._dmamap_destroy = _bus_dmamap_destroy,
._dmamap_load = _bus_dmamap_load,
._dmamap_load_mbuf = _bus_dmamap_load_mbuf,
._dmamap_load_uio = _bus_dmamap_load_uio,
._dmamap_load_raw = _bus_dmamap_load_raw,
._dmamap_unload = _bus_dmamap_unload,
._dmamap_sync = _bus_dmamap_sync,
._dmamem_alloc = _bus_dmamem_alloc,
._dmamem_free = _bus_dmamem_free,
._dmamem_map = _bus_dmamem_map,
._dmamem_unmap = _bus_dmamem_unmap,
._dmamem_mmap = _bus_dmamem_mmap,
};
int
vsbus_print(void *aux, const char *name)
{
struct vsbus_attach_args * const va = aux;
aprint_normal(" csr 0x%lx vec %o ipl %x maskbit %d", va->va_paddr,
va->va_cvec & 511, va->va_br, va->va_maskno - 1);
return UNCONF;
}
int
vsbus_match(device_t parent, cfdata_t cf, void *aux)
{
struct mainbus_attach_args * const ma = aux;
return !strcmp("vsbus", ma->ma_type);
}
void
vsbus_attach(device_t parent, device_t self, void *aux)
{
struct mainbus_attach_args * const ma = aux;
struct vsbus_softc *sc = device_private(self);
int dbase, dsize;
aprint_normal("\n");
sc->sc_dev = self;
sc->sc_iot = ma->ma_iot;
sc->sc_dmatag = vsbus_bus_dma_tag;
switch (vax_boardtype) {
#if VAX49 || VAX53
case VAX_BTYP_53:
case VAX_BTYP_49:
sc->sc_vsregs = vax_map_physmem(0x25c00000, 1);
sc->sc_intreq = (char *)sc->sc_vsregs + 12;
sc->sc_intclr = (char *)sc->sc_vsregs + 12;
sc->sc_intmsk = (char *)sc->sc_vsregs + 8;
vsbus_dma_init(sc, 8192);
break;
#endif
#if VAX46 || VAX48
case VAX_BTYP_48:
case VAX_BTYP_46:
sc->sc_vsregs = vax_map_physmem(VS_REGS, 1);
sc->sc_intreq = (char *)sc->sc_vsregs + 15;
sc->sc_intclr = (char *)sc->sc_vsregs + 15;
sc->sc_intmsk = (char *)sc->sc_vsregs + 12;
vsbus_dma_init(sc, 32768);
#endif
default:
sc->sc_vsregs = vax_map_physmem(VS_REGS, 1);
sc->sc_intreq = (char *)sc->sc_vsregs + 15;
sc->sc_intclr = (char *)sc->sc_vsregs + 15;
sc->sc_intmsk = (char *)sc->sc_vsregs + 12;
if (vax_boardtype == VAX_BTYP_410) {
dbase = KA410_DMA_BASE;
dsize = KA410_DMA_SIZE;
} else {
dbase = KA420_DMA_BASE;
dsize = KA420_DMA_SIZE;
*(char *)(sc->sc_vsregs + 0xe0) = 1; /* Big DMA */
}
sc->sc_dmasize = dsize;
sc->sc_dmaaddr = uvm_km_alloc(kernel_map, dsize, 0,
UVM_KMF_VAONLY);
ioaccess(sc->sc_dmaaddr, dbase, dsize/VAX_NBPG);
break;
}
SIMPLEQ_INIT(&vsbus_dma);
/*
* First: find which interrupts we won't care about.
* There are interrupts that interrupt on a periodic basic
* that we don't want to interfere with the rest of the
* interrupt probing.
*/
*sc->sc_intmsk = 0;
*sc->sc_intclr = 0xff;
DELAY(1000000); /* Wait a second */
sc->sc_mask = *sc->sc_intreq;
aprint_normal_dev(self, "interrupt mask %x\n", sc->sc_mask);
/*
* now check for all possible devices on this "bus"
*/
config_search_ia(vsbus_search, self, "vsbus", NULL);
/* Autoconfig finished, enable interrupts */
*sc->sc_intmsk = ~sc->sc_mask;
}
int
vsbus_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
{
struct vsbus_softc *sc = device_private(parent);
struct vsbus_attach_args va;
int i, vec, br;
u_char c;
va.va_paddr = cf->cf_loc[VSBUSCF_CSR];
va.va_addr = vax_map_physmem(va.va_paddr, 1);
va.va_dmat = &sc->sc_dmatag;
va.va_memt = sc->sc_iot;
*sc->sc_intmsk = 0;
*sc->sc_intclr = 0xff;
scb_vecref(0, 0); /* Clear vector ref */
i = config_match(parent, cf, &va);
vax_unmap_physmem(va.va_addr, 1);
c = *sc->sc_intreq & ~sc->sc_mask;
if (i == 0)
goto forgetit;
if (i > 10)
c = sc->sc_mask; /* Fooling interrupt */
else if (c == 0)
goto forgetit;
*sc->sc_intmsk = c;
DELAY(100);
*sc->sc_intmsk = 0;
va.va_maskno = ffs((u_int)c);
i = scb_vecref(&vec, &br);
if (i == 0)
goto fail;
if (vec == 0)
goto fail;
va.va_br = br;
va.va_cvec = vec;
va.va_dmaaddr = sc->sc_dmaaddr;
va.va_dmasize = sc->sc_dmasize;
*sc->sc_intmsk = c; /* Allow interrupts during attach */
config_attach(parent, cf, &va, vsbus_print);
*sc->sc_intmsk = 0;
return 0;
fail:
printf("%s%d at %s csr 0x%x %s\n",
cf->cf_name, cf->cf_unit, device_xname(parent),
cf->cf_loc[VSBUSCF_CSR], (i ? "zero vector" : "didn't interrupt"));
forgetit:
return 0;
}
/*
* Sets a new interrupt mask. Returns the old one.
* Works like spl functions.
*/
unsigned char
vsbus_setmask(int mask)
{
struct vsbus_softc * const sc = device_lookup_private(&vsbus_cd, 0);
unsigned char ch;
if (sc == NULL)
return 0;
ch = *sc->sc_intmsk;
*sc->sc_intmsk = mask;
return ch;
}
/*
* Clears the interrupts in mask.
*/
void
vsbus_clrintr(int mask)
{
struct vsbus_softc * const sc = device_lookup_private(&vsbus_cd, 0);
if (sc == NULL)
return;
*sc->sc_intclr = mask;
}
/*
* Copy data from/to a user process' space from the DMA area.
* Use the physical memory directly.
*/
void
vsbus_copytoproc(struct proc *p, void *fromv, void *tov, int len)
{
char *from = fromv, *to = tov;
struct pte *pte;
paddr_t pa;
if ((vaddr_t)to & KERNBASE) { /* In kernel space */
bcopy(from, to, len);
return;
}
#ifdef DIAGNOSTIC
if (p == NULL)
panic("vsbus_copytoproc: no proc");
#endif
if ((vaddr_t)to & 0x40000000)
pte = &p->p_vmspace->vm_map.pmap->pm_p1br[vax_btop((vaddr_t)to & ~0x40000000)];
else
pte = &p->p_vmspace->vm_map.pmap->pm_p0br[vax_btop((vaddr_t)to)];
if ((vaddr_t)to & PGOFSET) {
int cz = round_page((vaddr_t)to) - (vaddr_t)to;
pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE;
bcopy(from, (void *)pa, min(cz, len));
from += cz;
to += cz;
len -= cz;
pte += 8; /* XXX */
}
while (len > 0) {
pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE;
bcopy(from, (void *)pa, min(PAGE_SIZE, len));
from += PAGE_SIZE;
to += PAGE_SIZE;
len -= PAGE_SIZE;
pte += 8; /* XXX */
}
}
void
vsbus_copyfromproc(struct proc *p, void *fromv, void *tov, int len)
{
char *from = fromv, *to = tov;
struct pte *pte;
paddr_t pa;
if ((vaddr_t)from & KERNBASE) { /* In kernel space */
bcopy(from, to, len);
return;
}
#ifdef DIAGNOSTIC
if (p == NULL)
panic("vsbus_copyfromproc: no proc");
#endif
if ((vaddr_t)from & 0x40000000)
pte = &p->p_vmspace->vm_map.pmap->pm_p1br[vax_btop((vaddr_t)from & ~0x40000000)];
else
pte = &p->p_vmspace->vm_map.pmap->pm_p0br[vax_btop((vaddr_t)from)];
if ((vaddr_t)from & PGOFSET) {
int cz = round_page((vaddr_t)from) - (vaddr_t)from;
pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE;
bcopy((void *)pa, to, min(cz, len));
from += cz;
to += cz;
len -= cz;
pte += 8; /* XXX */
}
while (len > 0) {
pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE;
bcopy((void *)pa, to, min(PAGE_SIZE, len));
from += PAGE_SIZE;
to += PAGE_SIZE;
len -= PAGE_SIZE;
pte += 8; /* XXX */
}
}
/*
* There can only be one user of the DMA area on VS2k/VS3100 at one
* time, so keep track of it here.
*/
static int vsbus_active = 0;
void
vsbus_dma_start(struct vsbus_dma *vd)
{
SIMPLEQ_INSERT_TAIL(&vsbus_dma, vd, vd_q);
if (vsbus_active == 0)
vsbus_dma_intr();
}
void
vsbus_dma_intr(void)
{
struct vsbus_dma *vd;
vd = SIMPLEQ_FIRST(&vsbus_dma);
if (vd == NULL) {
vsbus_active = 0;
return;
}
vsbus_active = 1;
SIMPLEQ_REMOVE_HEAD(&vsbus_dma, vd_q);
(*vd->vd_go)(vd->vd_arg);
}