xen: events: refactor GSI pirq bindings functions
Following the example set by xen_allocate_pirq_msi and
xen_bind_pirq_msi_to_irq:
xen_allocate_pirq becomes xen_allocate_pirq_gsi and now only allocates
a pirq number and does not bind it.
xen_map_pirq_gsi becomes xen_bind_pirq_gsi_to_irq and binds an
existing pirq.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
index 8c4085a..e37b407 100644
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -50,7 +50,7 @@
name = "ioapic-level";
}
- irq = xen_map_pirq_gsi(map_irq.pirq, gsi, shareable, name);
+ irq = xen_bind_pirq_gsi_to_irq(gsi, map_irq.pirq, shareable, name);
printk(KERN_DEBUG "xen: --> irq=%d, pirq=%d\n", irq, map_irq.pirq);
@@ -237,6 +237,7 @@
{
int rc;
int share = 1;
+ int pirq;
u8 gsi;
rc = pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &gsi);
@@ -246,13 +247,21 @@
return rc;
}
+ rc = xen_allocate_pirq_gsi(gsi);
+ if (rc < 0) {
+ dev_warn(&dev->dev, "Xen PCI: failed to allocate a PIRQ for GSI%d: %d\n",
+ gsi, rc);
+ return rc;
+ }
+ pirq = rc;
+
if (gsi < NR_IRQS_LEGACY)
share = 0;
- rc = xen_allocate_pirq(gsi, share, "pcifront");
+ rc = xen_bind_pirq_gsi_to_irq(gsi, pirq, share, "pcifront");
if (rc < 0) {
- dev_warn(&dev->dev, "Xen PCI: failed to register GSI%d: %d\n",
- gsi, rc);
+ dev_warn(&dev->dev, "Xen PCI: failed to bind GSI%d (PIRQ%d) to IRQ: %d\n",
+ gsi, pirq, rc);
return rc;
}
@@ -309,7 +318,7 @@
#ifdef CONFIG_XEN_DOM0
static int xen_register_pirq(u32 gsi, int triggering)
{
- int rc, irq;
+ int rc, pirq, irq = -1;
struct physdev_map_pirq map_irq;
int shareable = 0;
char *name;
@@ -325,17 +334,20 @@
name = "ioapic-level";
}
- irq = xen_allocate_pirq(gsi, shareable, name);
+ pirq = xen_allocate_pirq_gsi(gsi);
+ if (pirq < 0)
+ goto out;
- printk(KERN_DEBUG "xen: --> irq=%d\n", irq);
-
+ irq = xen_bind_pirq_gsi_to_irq(gsi, pirq, shareable, name);
if (irq < 0)
goto out;
+ printk(KERN_DEBUG "xen: --> pirq=%d -> irq=%d\n", pirq, irq);
+
map_irq.domid = DOMID_SELF;
map_irq.type = MAP_PIRQ_TYPE_GSI;
map_irq.index = gsi;
- map_irq.pirq = irq;
+ map_irq.pirq = pirq;
rc = HYPERVISOR_physdev_op(PHYSDEVOP_map_pirq, &map_irq);
if (rc) {
@@ -422,13 +434,18 @@
void __init xen_setup_pirqs(void)
{
- int irq;
+ int pirq, irq;
pci_xen_initial_domain();
if (0 == nr_ioapics) {
- for (irq = 0; irq < NR_IRQS_LEGACY; irq++)
- xen_allocate_pirq(irq, 0, "xt-pic");
+ for (irq = 0; irq < NR_IRQS_LEGACY; irq++) {
+ pirq = xen_allocate_pirq_gsi(irq);
+ if (WARN(pirq < 0,
+ "Could not allocate PIRQ for legacy interrupt\n"))
+ break;
+ irq = xen_bind_pirq_gsi_to_irq(irq, pirq, 0, "xt-pic");
+ }
return;
}