* Copyright (c) 1982, 1986 The Regents of the University of California.

/* $NetBSD: uba_sbi.c,v 1.30 2017/05/22 17:15:45 ragge Exp $ */
/*
* Copyright (c) 1982, 1986 The Regents of the University of California.
* 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. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
* @(#)uba.c 7.10 (Berkeley) 12/16/90
* @(#)autoconf.c 7.20 (Berkeley) 5/9/91
*/

/*
* Copyright (c) 1996 Jonathan Stone.
* Copyright (c) 1994, 1996 Ludd, University of Lule}, Sweden.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)uba.c 7.10 (Berkeley) 12/16/90
* @(#)autoconf.c 7.20 (Berkeley) 5/9/91
*/

/*
* Abus support added by Johnny Billquist 2010
* Changed UBA code to need to know less of the innards of the
* actual machine at the same time. Information passed down from
* the SBI bus instead.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uba_sbi.c,v 1.30 2017/05/22 17:15:45 ragge Exp $");

#define _VAX_BUS_DMA_PRIVATE

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/cpu.h>
#include <sys/device.h>
#include <sys/kernel.h>

#include <machine/nexus.h>
#include <machine/sgmap.h>
#include <machine/scb.h>

#include <dev/qbus/ubavar.h>

#include <vax/uba/uba_common.h>

#include "locators.h"
#include "ioconf.h"

/* Some SBI-specific defines */
#define UBASIZE (UBAPAGES * VAX_NBPG)
#define UMEM(sa,i) ((sa->sa_base)+0x100000+(i)*0x40000)

/*
* Some status registers.
*/
#define UBACNFGR_UBIC 0x00010000 /* unibus init complete */
#define UBACNFGR_BITS \
"\40\40PARFLT\37WSQFLT\36URDFLT\35ISQFLT\34MXTFLT\33XMTFLT\30ADPDN\27ADPUP\23UBINIT\22UBPDN\21UBIC"

#define UBACR_IFS 0x00000040 /* interrupt field switch */
#define UBACR_BRIE 0x00000020 /* BR interrupt enable */
#define UBACR_USEFIE 0x00000010 /* UNIBUS to SBI error field IE */
#define UBACR_SUEFIE 0x00000008 /* SBI to UNIBUS error field IE */
#define UBACR_ADINIT 0x00000001 /* adapter init */

#define UBADPR_BNE 0x80000000 /* buffer not empty - purge */

#define UBABRRVR_DIV 0x0000ffff /* device interrupt vector field */

#define UBASR_BITS \
"\20\13RDTO\12RDS\11CRD\10CXTER\7CXTMO\6DPPE\5IVMR\4MRPF\3LEB\2UBSTO\1UBSSYNTO"

const char ubasr_bits[] = UBASR_BITS;

/*
* The DW780 are directly connected to the SBI on 11/780 and 8600.
*/
static int dw780_match(device_t, cfdata_t, void *);
static void dw780_attach(device_t, device_t, void *);
static void dw780_init(struct uba_softc*);
static void dw780_beforescan(struct uba_softc *);
static void dw780_afterscan(struct uba_softc *);
static int dw780_errchk(struct uba_softc *);
static inline void uba_dw780int_common(void *, int);
static void uba_dw780int_0x14(void *);
static void uba_dw780int_0x15(void *);
static void uba_dw780int_0x16(void *);
static void uba_dw780int_0x17(void *);
static void ubaerror(struct uba_softc *, int *, int *);
#ifdef notyet
static void dw780_purge(struct uba_softc *, int);
#endif

CFATTACH_DECL_NEW(uba_sbi, sizeof(struct uba_vsoftc),
dw780_match, dw780_attach, NULL, NULL);

static struct evcnt strayint = EVCNT_INITIALIZER(EVCNT_TYPE_INTR, NULL, "uba","stray intr");
static int strayinit = 0;

extern struct vax_bus_space vax_mem_bus_space;

int
dw780_match(device_t parent, cfdata_t cf, void *aux)
{
struct sbi_attach_args * const sa = aux;

if (cf->cf_loc[SBICF_TR] != sa->sa_nexnum &&
cf->cf_loc[SBICF_TR] != SBICF_TR_DEFAULT)
return 0;
/*
* The uba type is actually only telling where the uba
* space is in nexus space.
*/
if ((sa->sa_type & ~3) != NEX_UBA0)
return 0;

return 1;
}

void
dw780_attach(device_t parent, device_t self, void *aux)
{
struct uba_vsoftc * const sc = device_private(self);
struct sbi_attach_args * const sa = aux;
int ubaddr = sa->sa_type & 3;

aprint_naive(": DW780\n");
aprint_normal(": DW780\n");

/*
* Fill in bus specific data.
*/
sc->uv_sc.uh_dev = self;
sc->uv_sc.uh_ubainit = dw780_init;
#ifdef notyet
sc->uv_sc.uh_ubapurge = dw780_purge;
#endif
sc->uv_sc.uh_beforescan = dw780_beforescan;
sc->uv_sc.uh_afterscan = dw780_afterscan;
sc->uv_sc.uh_errchk = dw780_errchk;
sc->uv_sc.uh_iot = sa->sa_iot;
sc->uv_sc.uh_dmat = &sc->uv_dmat;
sc->uv_sc.uh_nr = ubaddr;
sc->uv_uba = (void *)sa->sa_ioh;
sc->uh_ibase = VAX_NBPG + ubaddr * VAX_NBPG;
sc->uv_sc.uh_type = UBA_UBA;

if (strayinit++ == 0) evcnt_attach_static(&strayint); /* Setup stray
interrupt
counter. */

/*
* Set up dispatch vectors for DW780.
*/
#define SCB_VECALLOC_DW780(br) \
scb_vecalloc(vecnum(0, br, sa->sa_nexnum), uba_dw780int_ ## br, \
sc, SCB_ISTACK, &sc->uv_sc.uh_intrcnt) \

SCB_VECALLOC_DW780(0x14);
SCB_VECALLOC_DW780(0x15);
SCB_VECALLOC_DW780(0x16);
SCB_VECALLOC_DW780(0x17);

evcnt_attach_dynamic(&sc->uv_sc.uh_intrcnt, EVCNT_TYPE_INTR, NULL,
device_xname(sc->uv_sc.uh_dev), "intr");

/*
* Fill in variables used by the sgmap system.
*/
sc->uv_size = UBASIZE; /* Size in bytes of Unibus space */

uba_dma_init(sc);
uba_attach(&sc->uv_sc, UMEM(sa,ubaddr) + (UBAPAGES * VAX_NBPG));
}

void
dw780_beforescan(struct uba_softc *sc)
{
struct uba_vsoftc * const vc = (void *)sc;
volatile int *hej = &vc->uv_uba->uba_sr;

*hej = *hej;
vc->uv_uba->uba_cr = UBACR_IFS|UBACR_BRIE;
}

void
dw780_afterscan(struct uba_softc *sc)
{
struct uba_vsoftc * const vc = (void *)sc;

vc->uv_uba->uba_cr = UBACR_IFS | UBACR_BRIE |
UBACR_USEFIE | UBACR_SUEFIE |
(vc->uv_uba->uba_cr & 0x7c000000);
}

int
dw780_errchk(struct uba_softc *sc)
{
struct uba_vsoftc * const vc = (void *)sc;
volatile int *hej = &vc->uv_uba->uba_sr;

if (*hej) {
*hej = *hej;
return 1;
}
return 0;
}

static inline void
uba_dw780int_common(void *arg, int br)
{
extern void scb_stray(void *);
struct uba_vsoftc *vc = arg;
struct uba_regs *ur = vc->uv_uba;
struct ivec_dsp *ivec;
struct evcnt *uvec;
int vec;

uvec = &vc->uv_sc.uh_intrcnt;
vec = ur->uba_brrvr[br - 0x14];
if (vec <= 0) {
ubaerror(&vc->uv_sc, &br, &vec);
if (vec == 0)
return;
}

uvec->ev_count--; /* This interrupt should not be counted against
the uba. */
ivec = &scb_vec[(vc->uh_ibase + vec)/4];
if (cold && *ivec->hoppaddr == scb_stray) {
scb_fake(vec + vc->uh_ibase, br);
} else {
if (*ivec->hoppaddr == scb_stray)
strayint.ev_count++; /* Count against stray int */
else
ivec->ev->ev_count++; /* Count against device */
(*ivec->hoppaddr)(ivec->pushlarg);
}
}

#define UBA_DW780INT(br) \
void \
uba_dw780int_ ## br(void *arg) \
{ \
uba_dw780int_common(arg, br); \
} \

UBA_DW780INT(0x14);
UBA_DW780INT(0x15);
UBA_DW780INT(0x16);
UBA_DW780INT(0x17);

void
dw780_init(struct uba_softc *sc)
{
struct uba_vsoftc *vc = (void *)sc;

vc->uv_uba->uba_cr = UBACR_ADINIT;
vc->uv_uba->uba_cr = UBACR_IFS|UBACR_BRIE|UBACR_USEFIE|UBACR_SUEFIE;
while ((vc->uv_uba->uba_cnfgr & UBACNFGR_UBIC) == 0)
;
}

#ifdef notyet
void
dw780_purge(struct uba_softc *sc, int bdp)
{
struct uba_vsoftc *vc = (void *)sc;

vc->uv_uba->uba_dpr[bdp] |= UBADPR_BNE;
}
#endif

int ubawedgecnt = 10;
int ubacrazy = 500;
int zvcnt_max = 5000; /* in 8 sec */
int ubaerrcnt;
/*
* This routine is called by the locore code to process a UBA
* error on an 11/780 or 8600. The arguments are passed
* on the stack, and value-result (through some trickery).
* In particular, the uvec argument is used for further
* uba processing so the result aspect of it is very important.
*/
/*ARGSUSED*/
void
ubaerror(struct uba_softc *uh, int *ipl, int *uvec)
{
struct uba_vsoftc *vc = (void *)uh;
struct uba_regs *uba = vc->uv_uba;
int sr, s;
char sbuf[256], sbuf2[256];

if (*uvec == 0) {
/*
* Declare dt as unsigned so that negative values
* are handled as >8 below, in case time was set back.
*/
u_long dt = time_second - vc->uh_zvtime;

vc->uh_zvtotal++;
if (dt > 8) {
vc->uh_zvtime = time_second;
vc->uh_zvcnt = 0;
}
if (++vc->uh_zvcnt > zvcnt_max) {
aprint_error_dev(vc->uv_sc.uh_dev,
"too many zero vectors (%d in <%d sec)\n",
vc->uh_zvcnt, (int)dt + 1);

snprintb(sbuf, sizeof(sbuf), UBACNFGR_BITS,
uba->uba_cnfgr & ~0xff);
aprint_error(
"\tIPL 0x%x\n"
"\tcnfgr: %s\tAdapter Code: 0x%x\n",
*ipl, sbuf, uba->uba_cnfgr&0xff);

snprintb(sbuf, sizeof(sbuf), ubasr_bits, uba->uba_sr);
aprint_error(
"\tsr: %s\n"
"\tdcr: %x (MIC %sOK)\n",
sbuf, uba->uba_dcr,
(uba->uba_dcr&0x8000000)?"":"NOT ");

ubareset(&vc->uv_sc);
}
return;
}
if (uba->uba_cnfgr & NEX_CFGFLT) {
snprintb(sbuf, sizeof(sbuf), ubasr_bits, uba->uba_sr);
snprintb(sbuf2, sizeof(sbuf2), NEXFLT_BITS, uba->uba_cnfgr);
aprint_error_dev(vc->uv_sc.uh_dev,
"sbi fault sr=%s cnfgr=%s\n", sbuf, sbuf2);
ubareset(&vc->uv_sc);
*uvec = 0;
return;
}
sr = uba->uba_sr;
s = spluba();
snprintb(sbuf, sizeof(sbuf), ubasr_bits, uba->uba_sr);
aprint_error_dev(vc->uv_sc.uh_dev,
"uba error sr=%s fmer=%x fubar=%o\n",
sbuf, uba->uba_fmer, 4*uba->uba_fubar);
splx(s);
uba->uba_sr = sr;
*uvec &= UBABRRVR_DIV;
if (++ubaerrcnt % ubawedgecnt == 0) {
if (ubaerrcnt > ubacrazy)
panic("uba crazy");
printf("ERROR LIMIT ");
ubareset(&vc->uv_sc);
*uvec = 0;
}
}