/* $NetBSD: dwlpx.c,v 1.43 2021/08/07 16:18:41 thorpej Exp $ */
/*
* Copyright (c) 1997 by Matthew Jacob
* NASA AMES Research Center.
* 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 immediately at the beginning of the file, without modification,
* 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. 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 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 AUTHOR 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.
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: dwlpx.c,v 1.43 2021/08/07 16:18:41 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/cpu.h>
#include <machine/autoconf.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <alpha/tlsb/tlsbreg.h>
#include <alpha/tlsb/kftxxvar.h>
#include <alpha/tlsb/kftxxreg.h>
#include <alpha/pci/dwlpxreg.h>
#include <alpha/pci/dwlpxvar.h>
#define KV(_addr) ((void *)ALPHA_PHYS_TO_K0SEG((_addr)))
#define DWLPX_SYSBASE(sc) \
((((unsigned long)((sc)->dwlpx_node - 4)) << 36) | \
(((unsigned long) (sc)->dwlpx_hosenum) << 34) | \
(1LL << 39))
#define DWLPX_SYSBASE1(node, hosenum) \
((((unsigned long)(node - 4)) << 36) | \
(((unsigned long) hosenum) << 34) | \
(1LL << 39))
static int dwlpxmatch(device_t, cfdata_t, void *);
static void dwlpxattach(device_t, device_t, void *);
CFATTACH_DECL_NEW(dwlpx, sizeof(struct dwlpx_softc),
dwlpxmatch, dwlpxattach, NULL, NULL);
extern struct cfdriver dwlpx_cd;
void dwlpx_errintr(void *, u_long vec);
static int
dwlpxmatch(device_t parent, cfdata_t cf, void *aux)
{
struct kft_dev_attach_args *ka = aux;
unsigned long ls;
uint32_t ctl;
if (strcmp(ka->ka_name, dwlpx_cd.cd_name) != 0)
return (0);
ls = DWLPX_SYSBASE1(ka->ka_node, ka->ka_hosenum);
/*
* Probe the first HPC to make sure this really is a dwlpx and
* nothing else.
*/
if (badaddr(KV(PCIA_CTL(1) + ls), sizeof (ctl)) != 0) {
/*
* If we are here something went wrong. One reason
* could be that this is a dwlma and not a dwlpx.
*
* We can not clear potential illegal CSR errors here
* since it is unknown hardware.
*/
return (0);
}
return (1);
}
static void
dwlpxattach(device_t parent, device_t self, void *aux)
{
struct dwlpx_softc *sc = device_private(self);
struct dwlpx_config *ccp = &sc->dwlpx_cc;
struct kft_dev_attach_args *ka = aux;
struct pcibus_attach_args pba;
uint32_t pcia_present;
sc->dwlpx_dev = self;
sc->dwlpx_node = ka->ka_node;
sc->dwlpx_dtype = ka->ka_dtype;
sc->dwlpx_hosenum = ka->ka_hosenum;
dwlpx_init(sc);
dwlpx_dma_init(ccp);
pcia_present = REGVAL(PCIA_PRESENT + ccp->cc_sysbase);
aprint_normal(": PCIA rev. %d, STD I/O %spresent, %dK S/G entries\n",
(pcia_present >> PCIA_PRESENT_REVSHIFT) & PCIA_PRESENT_REVMASK,
(pcia_present & PCIA_PRESENT_STDIO) == 0 ? "not " : "",
sc->dwlpx_sgmapsz == DWLPX_SG128K ? 128 : 32);
#if 0
{
int hpc, slot, slotval;
const char *str;
for (hpc = 0; hpc < sc->dwlpx_nhpc; hpc++) {
for (slot = 0; slot < 4; slot++) {
slotval = (pcia_present >>
PCIA_PRESENT_SLOTSHIFT(hpc, slot)) &
PCIA_PRESENT_SLOT_MASK;
if (slotval == PCIA_PRESENT_SLOT_NONE)
continue;
switch (slotval) {
case PCIA_PRESENT_SLOT_25W:
str = "25";
break;
case PCIA_PRESENT_SLOT_15W:
str = "15";
break;
case PCIA_PRESENT_SLOW_7W:
default: /* XXX gcc */
str = "7.5";
break;
}
aprint_normal_dev(sc->dwlpx_dev,
"hpc %d slot %d: %s watt module\n",
hpc, slot, str);
}
}
}
#endif
/*
* Set up interrupts
*/
alpha_pci_intr_init(&sc->dwlpx_cc, &sc->dwlpx_cc.cc_iot,
&sc->dwlpx_cc.cc_memt, &sc->dwlpx_cc.cc_pc);
/*
* Attach PCI bus
*/
pba.pba_iot = &sc->dwlpx_cc.cc_iot;
pba.pba_memt = &sc->dwlpx_cc.cc_memt;
pba.pba_dmat = /* start with direct, may change... */
alphabus_dma_get_tag(&sc->dwlpx_cc.cc_dmat_direct, ALPHA_BUS_PCI);
pba.pba_dmat64 = NULL;
pba.pba_pc = &sc->dwlpx_cc.cc_pc;
pba.pba_bus = 0;
pba.pba_bridgetag = NULL;
pba.pba_flags = PCI_FLAGS_IO_OKAY | PCI_FLAGS_MEM_OKAY |
PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | PCI_FLAGS_MWI_OKAY;
config_found(self, &pba, pcibusprint, CFARGS_NONE);
}
void
dwlpx_init(struct dwlpx_softc *sc)
{
uint32_t ctl;
struct dwlpx_config *ccp = &sc->dwlpx_cc;
unsigned long vec, ls = DWLPX_SYSBASE(sc);
int i;
if (ccp->cc_initted == 0) {
/*
* On reads, you get a fault if you read a nonexisted HPC.
* We know the internal KFTIA hose (hose 0) has only 2 HPCs,
* but we can also actually probe for HPCs.
* Assume at least one.
*/
for (sc->dwlpx_nhpc = 1; sc->dwlpx_nhpc < NHPC;
sc->dwlpx_nhpc++) {
if (badaddr(KV(PCIA_CTL(sc->dwlpx_nhpc) + ls),
sizeof (ctl)) != 0) {
break;
}
}
if (sc->dwlpx_nhpc != NHPC) {
/* clear (potential) Illegal CSR Address Error */
REGVAL(PCIA_ERR(0) + DWLPX_SYSBASE(sc)) =
PCIA_ERR_ALLERR;
}
dwlpx_bus_io_init(&ccp->cc_iot, ccp);
dwlpx_bus_mem_init(&ccp->cc_memt, ccp);
}
dwlpx_pci_init(&ccp->cc_pc, ccp);
ccp->cc_sc = sc;
/*
* Establish a precalculated base for convenience's sake.
*/
ccp->cc_sysbase = ls;
/*
* If there are only 2 HPCs, then the 'present' register is not
* implemented, so there will only ever be 32K SG entries. Otherwise
* any revision greater than zero will have 128K entries.
*/
ctl = REGVAL(PCIA_PRESENT + ccp->cc_sysbase);
if (sc->dwlpx_nhpc == 2) {
sc->dwlpx_sgmapsz = DWLPX_SG32K;
#if 0
/*
* As of 2/25/98- When I enable SG128K, and then have to flip
* TBIT below, I get bad SGRAM errors. We'll fix this later
* if this gets important.
*/
} else if ((ctl >> PCIA_PRESENT_REVSHIFT) & PCIA_PRESENT_REVMASK) {
sc->dwlpx_sgmapsz = DWLPX_SG128K;
#endif
} else {
sc->dwlpx_sgmapsz = DWLPX_SG32K;
}
/*
* Set up interrupt stuff for this DWLPX.
*
* Note that all PCI interrupt pins are disabled at this time.
*
* Do this even for all HPCs- even for the nonexistent
* one on hose zero of a KFTIA.
*/
mutex_enter(&cpu_lock);
vec = scb_alloc(dwlpx_errintr, sc);
mutex_exit(&cpu_lock);
if (vec == SCB_ALLOC_FAILED)
panic("%s: unable to allocate error vector",
device_xname(sc->dwlpx_dev));
aprint_normal_dev(sc->dwlpx_dev, "error interrupt at vector 0x%lx\n",
vec);
for (i = 0; i < NHPC; i++) {
REGVAL(PCIA_IMASK(i) + ccp->cc_sysbase) = DWLPX_IMASK_DFLT;
REGVAL(PCIA_ERRVEC(i) + ccp->cc_sysbase) = vec;
}
/*
* Establish HAE values, as well as make sure of sanity elsewhere.
*/
for (i = 0; i < sc->dwlpx_nhpc; i++) {
ctl = REGVAL(PCIA_CTL(i) + ccp->cc_sysbase);
ctl &= 0x0fffffff;
ctl &= ~(PCIA_CTL_MHAE(0x1f) | PCIA_CTL_IHAE(0x1f));
/*
* I originally also had it or'ing in 3, which makes no sense.
*/
ctl |= PCIA_CTL_RMMENA | PCIA_CTL_RMMARB;
/*
* Only valid if we're attached to a KFTIA or a KTHA.
*/
ctl |= PCIA_CTL_3UP;
ctl |= PCIA_CTL_CUTENA;
/*
* Fit in appropriate S/G Map Ram size.
*/
if (sc->dwlpx_sgmapsz == DWLPX_SG32K)
ctl |= PCIA_CTL_SG32K;
else if (sc->dwlpx_sgmapsz == DWLPX_SG128K)
ctl |= PCIA_CTL_SG128K;
else
ctl |= PCIA_CTL_SG32K;
REGVAL(PCIA_CTL(i) + ccp->cc_sysbase) = ctl;
}
/*
* Enable TBIT if required
*/
if (sc->dwlpx_sgmapsz == DWLPX_SG128K)
REGVAL(PCIA_TBIT + ccp->cc_sysbase) = 1;
alpha_mb();
ccp->cc_initted = 1;
}
void
dwlpx_errintr(void *arg, unsigned long vec)
{
struct dwlpx_softc *sc = arg;
struct dwlpx_config *ccp = &sc->dwlpx_cc;
int i;
struct {
uint32_t err;
uint32_t addr;
} hpcs[NHPC];
for (i = 0; i < sc->dwlpx_nhpc; i++) {
hpcs[i].err = REGVAL(PCIA_ERR(i) + ccp->cc_sysbase);
hpcs[i].addr = REGVAL(PCIA_FADR(i) + ccp->cc_sysbase);
}
aprint_error_dev(sc->dwlpx_dev, "node %d hose %d error interrupt\n",
sc->dwlpx_node, sc->dwlpx_hosenum);
for (i = 0; i < sc->dwlpx_nhpc; i++) {
if ((hpcs[i].err & PCIA_ERR_ERROR) == 0)
continue;
aprint_error("\tHPC %d: ERR=0x%08x; DMA %s Memory, "
"Failing Address 0x%x\n",
i, hpcs[i].err, hpcs[i].addr & 0x1? "write to" :
"read from", hpcs[i].addr & ~3);
if (hpcs[i].err & PCIA_ERR_SERR_L)
aprint_error("\t PCI device asserted SERR_L\n");
if (hpcs[i].err & PCIA_ERR_ILAT)
aprint_error("\t Incremental Latency Exceeded\n");
if (hpcs[i].err & PCIA_ERR_SGPRTY)
aprint_error("\t CPU access of SG RAM Parity Error\n");
if (hpcs[i].err & PCIA_ERR_ILLCSR)
aprint_error("\t Illegal CSR Address Error\n");
if (hpcs[i].err & PCIA_ERR_PCINXM)
aprint_error("\t Nonexistent PCI Address Error\n");
if (hpcs[i].err & PCIA_ERR_DSCERR)
aprint_error("\t PCI Target Disconnect Error\n");
if (hpcs[i].err & PCIA_ERR_ABRT)
aprint_error("\t PCI Target Abort Error\n");
if (hpcs[i].err & PCIA_ERR_WPRTY)
aprint_error("\t PCI Write Parity Error\n");
if (hpcs[i].err & PCIA_ERR_DPERR)
aprint_error("\t PCI Data Parity Error\n");
if (hpcs[i].err & PCIA_ERR_APERR)
aprint_error("\t PCI Address Parity Error\n");
if (hpcs[i].err & PCIA_ERR_DFLT)
aprint_error("\t SG Map RAM Invalid Entry Error\n");
if (hpcs[i].err & PCIA_ERR_DPRTY)
aprint_error("\t DMA access of SG RAM Parity Error\n");
if (hpcs[i].err & PCIA_ERR_DRPERR)
aprint_error("\t DMA Read Return Parity Error\n");
if (hpcs[i].err & PCIA_ERR_MABRT)
aprint_error("\t PCI Master Abort Error\n");
if (hpcs[i].err & PCIA_ERR_CPRTY)
aprint_error("\t CSR Parity Error\n");
if (hpcs[i].err & PCIA_ERR_COVR)
aprint_error("\t CSR Overrun Error\n");
if (hpcs[i].err & PCIA_ERR_MBPERR)
aprint_error("\t Mailbox Parity Error\n");
if (hpcs[i].err & PCIA_ERR_MBILI)
aprint_error("\t Mailbox Illegal Length Error\n");
REGVAL(PCIA_ERR(i) + ccp->cc_sysbase) = hpcs[i].err;
}
}
