hw/pci-host/gpex: Allow more than 4 legacy IRQs

Some boards such as vmapple don't do real legacy PCI IRQ swizzling.
Instead, they just keep allocating more board IRQ lines for each new
legacy IRQ. Let's support that mode by giving instantiators a new
"nr_irqs" property they can use to support more than 4 legacy IRQ lines.
In this mode, GPEX will export more IRQ lines, one for each device.

Signed-off-by: Alexander Graf <graf@amazon.com>
Signed-off-by: Phil Dennis-Jordan <phil@philjordan.eu>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Tested-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20241223221645.29911-9-phil@philjordan.eu>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

1 files changed, 3 insertions, 4 deletions

diff --git a/include/hw/pci-host/gpex.h b/include/hw/pci-host/gpex.h
index dce883573b..84471533af 100644
--- a/include/hw/pci-host/gpex.h
+++ b/include/hw/pci-host/gpex.h
@@ -32,8 +32,6 @@ OBJECT_DECLARE_SIMPLE_TYPE(GPEXHost, GPEX_HOST)
 #define TYPE_GPEX_ROOT_DEVICE "gpex-root"
 OBJECT_DECLARE_SIMPLE_TYPE(GPEXRootState, GPEX_ROOT_DEVICE)
 
-#define GPEX_NUM_IRQS 4
-
 struct GPEXRootState {
     /*< private >*/
     PCIDevice parent_obj;
@@ -49,6 +47,7 @@ struct GPEXConfig {
     PCIBus      *bus;
 };
 
+typedef struct GPEXIrq GPEXIrq;
 struct GPEXHost {
     /*< private >*/
     PCIExpressHost parent_obj;
@@ -60,8 +59,8 @@ struct GPEXHost {
     MemoryRegion io_mmio;
     MemoryRegion io_ioport_window;
     MemoryRegion io_mmio_window;
-    qemu_irq irq[GPEX_NUM_IRQS];
-    int irq_num[GPEX_NUM_IRQS];
+    GPEXIrq *irq;
+    uint8_t num_irqs;
 
     bool allow_unmapped_accesses;