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/* $OpenBSD: lofn.c,v 1.6 2001/06/26 23:21:18 jason Exp $ */
/*
* Copyright (c) 2001 Jason L. Wright (jason@thought.net)
* 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 by Jason L. Wright
* 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.
*/
/*
* Driver for the Hi/Fn 6500 assymmetric encryption processor.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include <vm/pmap.h>
#include <machine/pmap.h>
#include <sys/device.h>
#include <crypto/cryptodev.h>
#include <dev/rndvar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/lofnreg.h>
#include <dev/pci/lofnvar.h>
/*
* Prototypes and count for the pci_device structure
*/
int lofn_probe __P((struct device *, void *, void *));
void lofn_attach __P((struct device *, struct device *, void *));
struct cfattach lofn_ca = {
sizeof(struct lofn_softc), lofn_probe, lofn_attach,
};
struct cfdriver lofn_cd = {
0, "lofn", DV_DULL
};
int lofn_intr __P((void *));
int
lofn_probe(parent, match, aux)
struct device *parent;
void *match;
void *aux;
{
struct pci_attach_args *pa = (struct pci_attach_args *) aux;
if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_HIFN &&
PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_HIFN_6500)
return (1);
return (0);
}
void
lofn_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct lofn_softc *sc = (struct lofn_softc *)self;
struct pci_attach_args *pa = aux;
pci_chipset_tag_t pc = pa->pa_pc;
pci_intr_handle_t ih;
const char *intrstr = NULL;
bus_size_t iosize;
u_int32_t cmd;
cmd = pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
cmd |= PCI_COMMAND_MEM_ENABLE;
pci_conf_write(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, cmd);
cmd = pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
if (!(cmd & PCI_COMMAND_MEM_ENABLE)) {
printf(": failed to enable memory mapping\n");
return;
}
if (pci_mapreg_map(pa, LOFN_BAR0, PCI_MAPREG_TYPE_MEM, 0,
&sc->sc_st, &sc->sc_sh, NULL, &iosize, 0)) {
printf(": can't map mem space\n");
return;
}
sc->sc_dmat = pa->pa_dmat;
if (pci_intr_map(pc, pa->pa_intrtag, pa->pa_intrpin,
pa->pa_intrline, &ih)) {
printf(": couldn't map interrupt\n");
goto fail;
}
intrstr = pci_intr_string(pc, ih);
sc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, lofn_intr, sc,
self->dv_xname);
if (sc->sc_ih == NULL) {
printf(": couldn't establish interrupt");
if (intrstr != NULL)
printf(" at %s", intrstr);
printf("\n");
goto fail;
}
WRITE_REG_0(sc, LOFN_REL_RNC, LOFN_RNG_SCALAR);
/* Enable RNG */
WRITE_REG_0(sc, LOFN_REL_IER,
READ_REG_0(sc, LOFN_REL_IER) | LOFN_IER_RDY);
WRITE_REG_0(sc, LOFN_REL_CFG2,
READ_REG_0(sc, LOFN_REL_CFG2) | LOFN_CFG2_RNGENA);
printf(": %s\n", intrstr, sc->sc_sh);
return;
fail:
bus_space_unmap(sc->sc_st, sc->sc_sh, iosize);
}
int
lofn_intr(vsc)
void *vsc;
{
struct lofn_softc *sc = vsc;
u_int32_t sr;
int r = 0, i;
sr = READ_REG_0(sc, LOFN_REL_SR);
if (sr & LOFN_SR_RNG_UF) {
r = 1;
printf("%s: rng underflow (disabling)\n", sc->sc_dv.dv_xname);
WRITE_REG_0(sc, LOFN_REL_CFG2,
READ_REG_0(sc, LOFN_REL_CFG2) & (~LOFN_CFG2_RNGENA));
WRITE_REG_0(sc, LOFN_REL_IER,
READ_REG_0(sc, LOFN_REL_IER) & (~LOFN_IER_RDY));
} else if (sr & LOFN_SR_RNG_RDY) {
r = 1;
bus_space_read_region_4(sc->sc_st, sc->sc_sh, LOFN_REL_RNG,
sc->sc_rngbuf, LOFN_RNGBUF_SIZE);
for (i = 0; i < LOFN_RNGBUF_SIZE; i++)
add_true_randomness(sc->sc_rngbuf[i]);
}
return (r);
}
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