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