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/* $OpenBSD: xspd.c,v 1.7 2022/03/11 18:00:52 mpi Exp $ */
/*
* Copyright (c) 2015 Mike Belopuhov
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "xen.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/atomic.h>
#include <sys/device.h>
#include <sys/task.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
#include <machine/i82093var.h>
#include <dev/pv/xenreg.h>
#include <dev/pv/xenvar.h>
struct xspd_softc {
struct device sc_dev;
void * sc_ih;
};
int xspd_match(struct device *, void *, void *);
void xspd_attach(struct device *, struct device *, void *);
int xspd_intr(void *);
struct cfdriver xspd_cd = {
NULL, "xspd", DV_DULL
};
const struct cfattach xspd_ca = {
sizeof(struct xspd_softc), xspd_match, xspd_attach, NULL, NULL
};
const struct pci_matchid xspd_devices[] = {
{ PCI_VENDOR_XENSOURCE, PCI_PRODUCT_XENSOURCE_PLATFORMDEV }
};
int
xspd_match(struct device *parent, void *match, void *aux)
{
return (pci_matchbyid(aux, xspd_devices, nitems(xspd_devices)));
}
#if NXEN > 0
void
xspd_attach(struct device *parent, struct device *self, void *aux)
{
struct pci_attach_args *pa = (struct pci_attach_args *)aux;
struct xspd_softc *sc = (struct xspd_softc *)self;
const char *intrstr = NULL;
pci_intr_handle_t ih;
struct xen_hvm_param xhp;
extern struct xen_softc *xen_sc;
if (xen_sc == NULL || (xen_sc->sc_flags & XSF_CBVEC)) {
printf("\n");
return;
}
if (pci_intr_map(pa, &ih) != 0) {
printf(": couldn't map interrupt\n");
return;
}
intrstr = pci_intr_string(pa->pa_pc, ih);
sc->sc_ih = pci_intr_establish(pa->pa_pc, ih, IPL_NET | IPL_MPSAFE,
xspd_intr, sc, sc->sc_dev.dv_xname);
if (sc->sc_ih == NULL) {
printf(": couldn't establish interrupt");
if (intrstr != NULL)
printf(" at %s", intrstr);
printf("\n");
return;
}
printf(": %s\n", intrstr);
xhp.domid = DOMID_SELF;
xhp.index = HVM_PARAM_CALLBACK_IRQ;
if (ih.line & APIC_INT_VIA_APIC)
xhp.value = HVM_CALLBACK_PCI_INTX(pa->pa_device,
pa->pa_intrpin - 1);
else
xhp.value = HVM_CALLBACK_GSI(pci_intr_line(pa->pa_pc, ih));
if (xen_hypercall(xen_sc, XC_HVM, 2, HVMOP_set_param, &xhp)) {
printf("%s: failed to register callback PCI vector\n",
sc->sc_dev.dv_xname);
pci_intr_disestablish(pa->pa_pc, sc->sc_ih);
return;
}
xen_sc->sc_flags |= XSF_CBVEC;
}
int
xspd_intr(void *arg)
{
xen_intr();
return (1);
}
#else
void
xspd_attach(struct device *parent, struct device *self, void *aux)
{
printf("\n");
}
#endif /* NXEN > 0 */
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