/* $OpenBSD: pchb.c,v 1.10 2007/07/04 21:30:48 ckuethe Exp $ */
/* $NetBSD: pchb.c,v 1.1 2003/04/26 18:39:50 fvdl Exp $ */
/*
* Copyright (c) 2000 Michael Shalayeff
* 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.
*
* 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 OR HIS RELATIVES 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 MIND, 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.
*/
/*-
* Copyright (c) 1996, 1998, 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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 by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/timeout.h>
#include <machine/bus.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
#include <dev/rndvar.h>
#include <dev/ic/i82802reg.h>
#define PCISET_BRIDGETYPE_MASK 0x3
#define PCISET_TYPE_COMPAT 0x1
#define PCISET_TYPE_AUX 0x2
#define PCISET_BUSCONFIG_REG 0x48
#define PCISET_BRIDGE_NUMBER(reg) (((reg) >> 8) & 0xff)
#define PCISET_PCI_BUS_NUMBER(reg) (((reg) >> 16) & 0xff)
/* XXX should be in dev/ic/i82443reg.h */
#define I82443BX_SDRAMC_REG 0x76
/* XXX should be in dev/ic/i82424{reg.var}.h */
#define I82424_CPU_BCTL_REG 0x53
#define I82424_PCI_BCTL_REG 0x54
#define I82424_BCTL_CPUMEM_POSTEN 0x01
#define I82424_BCTL_CPUPCI_POSTEN 0x02
#define I82424_BCTL_PCIMEM_BURSTEN 0x01
#define I82424_BCTL_PCI_BURSTEN 0x02
/* XXX should be in dev/ic/amd64htreg.h */
#define AMD64HT_LDT0_BUS 0x94
#define AMD64HT_LDT0_TYPE 0x98
#define AMD64HT_LDT1_BUS 0xb4
#define AMD64HT_LDT1_TYPE 0xb8
#define AMD64HT_LDT2_BUS 0xd4
#define AMD64HT_LDT2_TYPE 0xd8
#define AMD64HT_NUM_LDT 3
#define AMD64HT_LDT_TYPE_MASK 0x0000001f
#define AMD64HT_LDT_INIT_COMPLETE 0x00000002
#define AMD64HT_LDT_NC 0x00000004
#define AMD64HT_LDT_SEC_BUS_NUM(reg) (((reg) >> 8) & 0xff)
struct pchb_softc {
struct device sc_dev;
bus_space_tag_t sc_bt;
bus_space_handle_t sc_bh;
int sc_rnd_i;
u_int32_t sc_rnd_ax;
struct timeout sc_rnd_to;
};
int pchbmatch(struct device *, void *, void *);
void pchbattach(struct device *, struct device *, void *);
int pchb_print(void *, const char *);
void pchb_rnd(void *);
void pchb_amd64ht_attach (struct device *, struct pci_attach_args *, int);
struct cfattach pchb_ca = {
sizeof(struct pchb_softc), pchbmatch, pchbattach,
};
struct cfdriver pchb_cd = {
NULL, "pchb", DV_DULL
};
int
pchbmatch(struct device *parent, void *match, void *aux)
{
struct pci_attach_args *pa = aux;
if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_HOST) {
return (1);
}
return (0);
}
void
pchbattach(struct device *parent, struct device *self, void *aux)
{
struct pchb_softc *sc = (struct pchb_softc *)self;
struct pci_attach_args *pa = aux;
struct timeval tv1, tv2;
int i, r;
switch (PCI_VENDOR(pa->pa_id)) {
case PCI_VENDOR_AMD:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_AMD_AMD64_HT:
for (i = 0; i < AMD64HT_NUM_LDT; i++)
pchb_amd64ht_attach(self, pa, i);
break;
}
break;
case PCI_VENDOR_INTEL:
#ifdef PCIAGP
pciagp_set_pchb(pa);
#endif
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_INTEL_82915G_HB:
case PCI_PRODUCT_INTEL_82925X_HB:
case PCI_PRODUCT_INTEL_82945GP_MCH:
case PCI_PRODUCT_INTEL_82955X_HB:
sc->sc_bt = pa->pa_memt;
if (bus_space_map(sc->sc_bt, I82802_IOBASE,
I82802_IOSIZE, 0, &sc->sc_bh)) {
break;
}
/* probe and init rng */
if (!(bus_space_read_1(sc->sc_bt, sc->sc_bh,
I82802_RNG_HWST) & I82802_RNG_HWST_PRESENT)) {
break;
}
/* enable RNG */
bus_space_write_1(sc->sc_bt, sc->sc_bh,
I82802_RNG_HWST,
bus_space_read_1(sc->sc_bt, sc->sc_bh,
I82802_RNG_HWST) | I82802_RNG_HWST_ENABLE);
/* see if we can read anything */
for (i = 1000; i-- &&
!(bus_space_read_1(sc->sc_bt,sc->sc_bh,
I82802_RNG_RNGST) & I82802_RNG_RNGST_DATAV);)
DELAY(10);
if (!(bus_space_read_1(sc->sc_bt, sc->sc_bh,
I82802_RNG_RNGST) & I82802_RNG_RNGST_DATAV)) {
break;
}
r = bus_space_read_1(sc->sc_bt, sc->sc_bh,
I82802_RNG_DATA);
/* benchmark the RNG */
microtime(&tv1);
for (i = 8 * 1024; i--; ) {
while(!(bus_space_read_1(sc->sc_bt, sc->sc_bh,
I82802_RNG_RNGST) & I82802_RNG_RNGST_DATAV))
;
r = bus_space_read_1(sc->sc_bt, sc->sc_bh,
I82802_RNG_DATA);
}
microtime(&tv2);
timersub(&tv2, &tv1, &tv1);
if (tv1.tv_sec)
tv1.tv_usec += 1000000 * tv1.tv_sec;
printf(": rng active");
if (tv1.tv_usec != 0)
printf(", %dKb/sec",
8 * 1000000 / tv1.tv_usec);
timeout_set(&sc->sc_rnd_to, pchb_rnd, sc);
sc->sc_rnd_i = 4;
pchb_rnd(sc);
break;
}
break;
}
printf("\n");
}
int
pchb_print(void *aux, const char *pnp)
{
struct pcibus_attach_args *pba = aux;
if (pnp)
printf("%s at %s", pba->pba_busname, pnp);
printf(" bus %d", pba->pba_bus);
return (UNCONF);
}
void
pchb_amd64ht_attach(struct device *self, struct pci_attach_args *pa, int i)
{
struct pcibus_attach_args pba;
pcireg_t type, bus;
int reg;
reg = AMD64HT_LDT0_TYPE + i * 0x20;
type = pci_conf_read(pa->pa_pc, pa->pa_tag, reg);
if ((type & AMD64HT_LDT_INIT_COMPLETE) == 0 ||
(type & AMD64HT_LDT_NC) == 0)
return;
reg = AMD64HT_LDT0_BUS + i * 0x20;
bus = pci_conf_read(pa->pa_pc, pa->pa_tag, reg);
if (AMD64HT_LDT_SEC_BUS_NUM(bus) > 0) {
pba.pba_busname = "pci";
pba.pba_iot = pa->pa_iot;
pba.pba_memt = pa->pa_memt;
pba.pba_dmat = pa->pa_dmat;
pba.pba_bus = AMD64HT_LDT_SEC_BUS_NUM(bus);
pba.pba_bridgetag = NULL;
pba.pba_pc = pa->pa_pc;
config_found(self, &pba, pchb_print);
}
}
/*
* Should do FIPS testing as per:
* http://csrc.nist.gov/publications/fips/fips140-1/fips1401.pdf
*/
void
pchb_rnd(void *v)
{
struct pchb_softc *sc = v;
/*
* Don't wait for data to be ready. If it's not there, we'll check
* next time.
*/
if ((bus_space_read_1(sc->sc_bt, sc->sc_bh, I82802_RNG_RNGST) &
I82802_RNG_RNGST_DATAV)) {
sc->sc_rnd_ax = (sc->sc_rnd_ax << 8) |
bus_space_read_1(sc->sc_bt, sc->sc_bh, I82802_RNG_DATA);
if (!sc->sc_rnd_i--) {
sc->sc_rnd_i = 4;
add_true_randomness(sc->sc_rnd_ax);
}
}
timeout_add(&sc->sc_rnd_to, 1);
}
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