int xencons_ring_init(void)
{
int irq;
if (xencons_irq)
unbind_from_irqhandler(xencons_irq, NULL);
xencons_irq = 0;
if (!is_running_on_xen() ||
is_initial_xendomain() ||
!xen_start_info->console.domU.evtchn)
return -ENODEV;
irq = bind_caller_port_to_irqhandler(
xen_start_info->console.domU.evtchn,
handle_input, 0, "xencons", NULL);
if (irq < 0) {
printk(KERN_ERR "XEN console request irq failed %i\n", irq);
return irq;
}
xencons_irq = irq;
/* In case we have in-flight data after save/restore... */
notify_daemon();
return 0;
}
static int pcifront_publish_info(struct pcifront_device *pdev)
{
int err = 0;
struct xenbus_transaction trans;
err = xenbus_grant_ring(pdev->xdev, virt_to_mfn(pdev->sh_info));
if (err < 0)
goto out;
pdev->gnt_ref = err;
err = xenbus_alloc_evtchn(pdev->xdev, &pdev->evtchn);
if (err)
goto out;
bind_caller_port_to_irqhandler(pdev->evtchn, pcifront_handler_aer,
IRQF_SAMPLE_RANDOM, "pcifront", pdev);
do_publish:
err = xenbus_transaction_start(&trans);
if (err) {
xenbus_dev_fatal(pdev->xdev, err,
"Error writing configuration for backend "
"(start transaction)");
goto out;
}
err = xenbus_printf(trans, pdev->xdev->nodename,
"pci-op-ref", "%u", pdev->gnt_ref);
if (!err)
err = xenbus_printf(trans, pdev->xdev->nodename,
"event-channel", "%u", pdev->evtchn);
if (!err)
err = xenbus_printf(trans, pdev->xdev->nodename,
"magic", XEN_PCI_MAGIC);
if (err) {
xenbus_transaction_end(trans, 1);
xenbus_dev_fatal(pdev->xdev, err,
"Error writing configuration for backend");
goto out;
} else {
err = xenbus_transaction_end(trans, 0);
if (err == -EAGAIN)
goto do_publish;
else if (err) {
xenbus_dev_fatal(pdev->xdev, err,
"Error completing transaction "
"for backend");
goto out;
}
}
xenbus_switch_state(pdev->xdev, XenbusStateInitialised);
dev_dbg(&pdev->xdev->dev, "publishing successful!\n");
out:
return err;
}
int
xencons_ring_init(void)
{
int err;
if (!xen_start_info->console_evtchn)
return 0;
err = bind_caller_port_to_irqhandler(xen_start_info->console_evtchn,
"xencons", xencons_handle_input, NULL,
INTR_TYPE_MISC | INTR_MPSAFE, &console_irq);
if (err) {
return err;
}
return 0;
}
