static void
pci_vtblk_qnotify(struct pci_vtblk_softc *sc)
{
struct vring_hqueue *hq = &sc->vbsc_q;
int i;
int ndescs;
/*
* Calculate number of ring entries to process
*/
ndescs = hq_num_avail(hq);
if (ndescs == 0)
return;
/*
* Run through all the entries, placing them into iovecs and
* sending when an end-of-packet is found
*/
for (i = 0; i < ndescs; i++)
pci_vtblk_proc(sc, hq);
/*
* Generate an interrupt if able
*/
if ((*hq->hq_avail_flags & VRING_AVAIL_F_NO_INTERRUPT) == 0 &&
sc->vbsc_isr == 0) {
sc->vbsc_isr = 1;
pci_generate_msi(sc->vbsc_pi, 0);
}
}
/*
* WDT timer, start when guest OS start watchdog service; and re-start for
* each dog-kick / ping action if time out, it will trigger reboot or other
* action to guest OS
*/
static void
wdt_expired_handler(void *arg, uint64_t nexp)
{
struct pci_vdev *dev = (struct pci_vdev *)arg;
DPRINTF("wdt timer out! stage=%d, reboot=%d\n",
wdt_state.stage, wdt_state.reboot_enabled);
if (wdt_state.stage == 1) {
if (wdt_state.intr_enabled) {
if (pci_msi_enabled(dev))
pci_generate_msi(dev, 0);
else
pci_lintr_assert(dev);
wdt_state.intr_active = true;
}
wdt_state.stage = 2;
start_wdt_timer();
} else {
if (wdt_state.reboot_enabled) {
wdt_state.stage = 1;
wdt_timeout = 1;
/* watchdog timer out, set the uos to reboot */
vm_set_suspend_mode(VM_SUSPEND_FULL_RESET);
mevent_notify();
} else {
/* if not need reboot, just loop timer */
wdt_state.stage = 1;
start_wdt_timer();
}
}
}
