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Kernel/PCI: Break early of controller iteration over devices in OOM case

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This is mainly useful when adding an HostController but due to OOM
condition, we abort temporary Vector insertion of a DeviceIdentifier
and then exit the iteration loop to report back the error if occured.
This commit is contained in:
Liav A 2022-02-04 22:11:50 +02:00 • committed by Andreas Kling
parent 3fb289e27d
commit 428d4ae337
5 changed files with 18 additions and 13 deletions
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8
Kernel/Bus/PCI/Controller/HostBridge.cpp
View file

@ -50,7 +50,7 @@ UNMAP_AFTER_INIT Vector<Capability> HostBridge::get_capabilities_for_function(Bu
return capabilities;
}
UNMAP_AFTER_INIT void HostBridge::enumerate_functions(Function<void(DeviceIdentifier)> const& callback, BusNumber bus, DeviceNumber device, FunctionNumber function, bool recursive_search_into_bridges)
UNMAP_AFTER_INIT void HostBridge::enumerate_functions(Function<IterationDecision(DeviceIdentifier)> const& callback, BusNumber bus, DeviceNumber device, FunctionNumber function, bool recursive_search_into_bridges)
{
dbgln_if(PCI_DEBUG, "PCI: Enumerating function, bus={}, device={}, function={}", bus, device, function);
Address address(domain_number(), bus.value(), device.value(), function.value());
@ -79,7 +79,7 @@ UNMAP_AFTER_INIT void HostBridge::enumerate_functions(Function<void(DeviceIdenti
}
}
UNMAP_AFTER_INIT void HostBridge::enumerate_device(Function<void(DeviceIdentifier)> const& callback, BusNumber bus, DeviceNumber device, bool recursive_search_into_bridges)
UNMAP_AFTER_INIT void HostBridge::enumerate_device(Function<IterationDecision(DeviceIdentifier)> const& callback, BusNumber bus, DeviceNumber device, bool recursive_search_into_bridges)
{
dbgln_if(PCI_DEBUG, "PCI: Enumerating device in bus={}, device={}", bus, device);
if (read16_field(bus, device, 0, PCI::RegisterOffset::VENDOR_ID) == PCI::none_value)
@ -93,14 +93,14 @@ UNMAP_AFTER_INIT void HostBridge::enumerate_device(Function<void(DeviceIdentifie
}
}
UNMAP_AFTER_INIT void HostBridge::enumerate_bus(Function<void(DeviceIdentifier)> const& callback, BusNumber bus, bool recursive_search_into_bridges)
UNMAP_AFTER_INIT void HostBridge::enumerate_bus(Function<IterationDecision(DeviceIdentifier)> const& callback, BusNumber bus, bool recursive_search_into_bridges)
{
dbgln_if(PCI_DEBUG, "PCI: Enumerating bus {}", bus);
for (u8 device = 0; device < 32; ++device)
enumerate_device(callback, bus, device, recursive_search_into_bridges);
}
UNMAP_AFTER_INIT void HostBridge::enumerate_attached_devices(Function<void(DeviceIdentifier)> callback)
UNMAP_AFTER_INIT void HostBridge::enumerate_attached_devices(Function<IterationDecision(DeviceIdentifier)> callback)
{
VERIFY(Access::the().access_lock().is_locked());
VERIFY(Access::the().scan_lock().is_locked());

8
Kernel/Bus/PCI/Controller/HostBridge.h
View file

@ -31,7 +31,7 @@ protected:
explicit HostBridge(PCI::Domain const&);
private:
virtual void enumerate_attached_devices(Function<void(DeviceIdentifier)> callback) override;
virtual void enumerate_attached_devices(Function<IterationDecision(DeviceIdentifier)> callback) override;
Bitmap m_enumerated_buses;
@ -41,9 +41,9 @@ private:
Optional<u8> get_capabilities_pointer_for_function(BusNumber, DeviceNumber, FunctionNumber);
Vector<Capability> get_capabilities_for_function(BusNumber, DeviceNumber, FunctionNumber);
void enumerate_bus(Function<void(DeviceIdentifier)> const& callback, BusNumber, bool recursive);
void enumerate_functions(Function<void(DeviceIdentifier)> const& callback, BusNumber, DeviceNumber, FunctionNumber, bool recursive);
void enumerate_device(Function<void(DeviceIdentifier)> const& callback, BusNumber bus, DeviceNumber device, bool recursive);
void enumerate_bus(Function<IterationDecision(DeviceIdentifier)> const& callback, BusNumber, bool recursive);
void enumerate_functions(Function<IterationDecision(DeviceIdentifier)> const& callback, BusNumber, DeviceNumber, FunctionNumber, bool recursive);
void enumerate_device(Function<IterationDecision(DeviceIdentifier)> const& callback, BusNumber bus, DeviceNumber device, bool recursive);
};
}

2
Kernel/Bus/PCI/Controller/HostController.h
View file

@ -31,7 +31,7 @@ public:
u32 domain_number() const { return m_domain.domain_number(); }
virtual void enumerate_attached_devices(Function<void(DeviceIdentifier)> callback) = 0;
virtual void enumerate_attached_devices(Function<IterationDecision(DeviceIdentifier)> callback) = 0;
protected:
explicit HostController(PCI::Domain const& domain)