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PCI-to-PCI bridges now return true in supports_io_space().

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Doing so ensures that accesses to the I/O space are broadcasted
to the PCI-to-PCI bridges automatically.
This commit is contained in:
Maxim Poliakovski 2024-08-17 00:58:22 +02:00
parent 2c026259b1
commit a34e0a4737
2 changed files with 6 additions and 16 deletions
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4
devices/common/pci/pcibridgebase.h
View File

@ -50,6 +50,10 @@ public:
virtual uint32_t pci_cfg_read(uint32_t reg_offs, AccessDetails &details);
virtual void pci_cfg_write(uint32_t reg_offs, uint32_t value, AccessDetails &details);
bool supports_io_space() {
return true;
};
// plugin interface for using in the derived classes
std::function<uint8_t()> pci_rd_primary_bus;
std::function<void(uint8_t)> pci_wr_primary_bus;

18
devices/common/pci/pcihost.cpp
View File

@ -171,15 +171,8 @@ uint32_t PCIHost::pci_io_read_broadcast(uint32_t offset, int size)
// broadcast I/O request to devices that support I/O space
// until a device returns true that means "request accepted"
if (pci_io_read_loop (offset, size, res)) {
if (pci_io_read_loop(offset, size, res))
return res;
}
// broadcast I/O request to devices sitting behind PCI-to-PCI bridges
for (auto& dev : this->bridge_devs) {
if (dev->pci_io_read_loop(offset, size, res))
return res;
}
// no device has accepted the request -> report error
HWComponent *hwc = dynamic_cast<HWComponent*>(this);
@ -196,15 +189,8 @@ void PCIHost::pci_io_write_broadcast(uint32_t offset, int size, uint32_t value)
{
// broadcast I/O request to devices that support I/O space
// until a device returns true that means "request accepted"
if (pci_io_write_loop(offset, size, value)) {
if (pci_io_write_loop(offset, size, value))
return;
}
// broadcast I/O request to devices sitting behind PCI-to-PCI bridges
for (auto& dev : this->bridge_devs) {
if (dev->pci_io_write_loop(offset, size, value))
return;
}
// no device has accepted the request -> report error
HWComponent *hwc = dynamic_cast<HWComponent*>(this);