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[v3,3/3] hw/pci-host/gpex: Implement PCI INTx routing

Message ID 1497360677-4780-4-git-send-email-eric.auger@redhat.com
State New
Headers show

Commit Message

Eric Auger June 13, 2017, 1:31 p.m. UTC 
From: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>

Now we are able to retrieve the gsi from the INTx pin, let's
enable intx_to_irq routing. From that point on, irqfd becomes
usable along with INTx when assigning a PCIe device.

Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
Signed-off-by: Tushar Jagad <tushar.jagad@linaro.org>
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
 hw/pci-host/gpex.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)
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Patch

diff --git a/hw/pci-host/gpex.c b/hw/pci-host/gpex.c
index 22367aa4..2ec918b 100644
--- a/hw/pci-host/gpex.c
+++ b/hw/pci-host/gpex.c
@@ -53,6 +53,17 @@  int gpex_set_irq_num(GPEXHost *s, int index, uint32_t gsi)
     return 0;
 }
 
+static PCIINTxRoute gpex_route_intx_pin_to_irq(void *opaque, int pin)
+{
+    PCIINTxRoute route;
+    GPEXHost *s = opaque;
+
+    route.mode = PCI_INTX_ENABLED;
+    route.irq = (int)s->irq_num[pin];
+
+    return route;
+}
+
 static void gpex_host_realize(DeviceState *dev, Error **errp)
 {
     PCIHostState *pci = PCI_HOST_BRIDGE(dev);
@@ -77,6 +88,7 @@  static void gpex_host_realize(DeviceState *dev, Error **errp)
                                 &s->io_ioport, 0, 4, TYPE_PCIE_BUS);
 
     qdev_set_parent_bus(DEVICE(&s->gpex_root), BUS(pci->bus));
+    pci_bus_set_route_irq_fn(pci->bus, gpex_route_intx_pin_to_irq);
     qdev_init_nofail(DEVICE(&s->gpex_root));
 }