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[Qemu-devel] [PATCH V6 for-2.3 22/26] hw/pxb: add map_irq func
From: |
Marcel Apfelbaum |
Subject: |
[Qemu-devel] [PATCH V6 for-2.3 22/26] hw/pxb: add map_irq func |
Date: |
Thu, 19 Mar 2015 20:52:57 +0200 |
The bios does not index the pxb slot number when
it computes the IRQ because it resides on bus 0
and not on the current bus.
However Qemu routes the irq through bus 0 and adds
the pxb slot to the IRQ computation of the PXB device.
Synchronize between bios and Qemu by canceling
pxb's effect.
Signed-off-by: Marcel Apfelbaum <address@hidden>
---
hw/pci-bridge/pci_expander_bridge.c | 21 ++++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/hw/pci-bridge/pci_expander_bridge.c
b/hw/pci-bridge/pci_expander_bridge.c
index e789220..3e350e6 100644
--- a/hw/pci-bridge/pci_expander_bridge.c
+++ b/hw/pci-bridge/pci_expander_bridge.c
@@ -93,6 +93,25 @@ static const TypeInfo pxb_host_info = {
.class_init = pxb_host_class_init,
};
+
+static int pxb_map_irq_fn(PCIDevice *pci_dev, int pin)
+{
+ PCIDevice *pxb = pci_dev->bus->parent_dev;
+
+ /*
+ * The bios does not index the pxb slot number when
+ * it computes the IRQ because it resides on bus 0
+ * and not on the current bus.
+ * However QEMU routes the irq through bus 0 and adds
+ * the pxb slot to the IRQ computation of the PXB
+ * device.
+ *
+ * Synchronize between bios and QEMU by canceling
+ * pxb's effect.
+ */
+ return pin - PCI_SLOT(pxb->devfn);
+}
+
static int pxb_dev_initfn(PCIDevice *dev)
{
PXBDev *pxb = PXB_DEV(dev);
@@ -110,7 +129,7 @@ static int pxb_dev_initfn(PCIDevice *dev)
bus->parent_dev = dev;
bus->address_space_mem = dev->bus->address_space_mem;
bus->address_space_io = dev->bus->address_space_io;
- bus->map_irq = pci_swizzle_map_irq_fn;
+ bus->map_irq = pxb_map_irq_fn;
bds = qdev_create(BUS(bus), "pci-bridge");
bds->id = dev_name;
--
2.1.0
- [Qemu-devel] [PATCH V6 for-2.3 10/26] hw/pci: made pci_bus_is_root a PCIBusClass method, (continued)
- [Qemu-devel] [PATCH V6 for-2.3 10/26] hw/pci: made pci_bus_is_root a PCIBusClass method, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 11/26] hw/pci: made pci_bus_num a PCIBusClass method, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 16/26] hw/apci: add _PRT method for extra PCI root busses, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 15/26] hw/acpi: add support for i440fx 'snooping' root busses, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 12/26] hw/pci: introduce TYPE_PCI_MAIN_HOST_BRIDGE interface, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 17/26] hw/acpi: add _CRS method for extra root busses, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 19/26] hw/pci: removed 'rootbus nr is 0' assumption from qmp_pci_query, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 21/26] hw/pci: inform bios if the system has extra pci root buses, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 18/26] hw/acpi: remove from root bus 0 the crs resources used by other busses., Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 25/26] apci: fix PXB behaviour if used with unsupported BIOS, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 22/26] hw/pxb: add map_irq func,
Marcel Apfelbaum <=
- [Qemu-devel] [PATCH V6 for-2.3 20/26] hw/pci: introduce PCI Expander Bridge (PXB), Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 24/26] hw/pxb: add numa_node parameter, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 26/26] docs: Add PXB documentation, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 23/26] hw/pci_bus: add support for NUMA nodes, Marcel Apfelbaum, 2015/03/19
- Re: [Qemu-devel] [PATCH V6 for-2.3 00/26] hw/pc: implement multiple primary busses for pc machines, Paolo Bonzini, 2015/03/19
- Re: [Qemu-devel] [PATCH V6 for-2.3 00/26] hw/pc: implement multiple primary busses for pc machines, Gerd Hoffmann, 2015/03/20