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Kernel/Graphics: Introduce a new mechanism to initialize a PCI device

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Instead of using a clunky switch-case paradigm, we now have all drivers
being declaring two methods for their adapter class - create and probe.
These methods are linked in each PCIGraphicsDriverInitializer structure,
in a new s_initializers static list of them.
Then, when we probe for a PCI device, we use each probe method and if
there's a match, then the corresponding create method is called.

As a result of this change, it's much more easy to add more drivers and
the initialization code is more readable.
This commit is contained in:
Liav A 2022-12-17 21:15:31 +02:00 • committed by Andrew Kaster
parent 7625f7db73
commit 72b144e9e9
12 changed files with 85 additions and 71 deletions
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5
Kernel/Graphics/Bochs/GraphicsAdapter.h
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@ -24,14 +24,15 @@ class BochsGraphicsAdapter final : public GenericGraphicsAdapter
friend class GraphicsManagement;
public:
static NonnullLockRefPtr<BochsGraphicsAdapter> initialize(PCI::DeviceIdentifier const&);
static ErrorOr<bool> probe(PCI::DeviceIdentifier const&);
static ErrorOr<NonnullLockRefPtr<GenericGraphicsAdapter>> create(PCI::DeviceIdentifier const&);
virtual ~BochsGraphicsAdapter() = default;
virtual StringView device_name() const override { return "BochsGraphicsAdapter"sv; }
private:
ErrorOr<void> initialize_adapter(PCI::DeviceIdentifier const&);
explicit BochsGraphicsAdapter(PCI::DeviceIdentifier const&);
explicit BochsGraphicsAdapter(PCI::Address const&);
LockRefPtr<DisplayConnector> m_display_connector;
};