RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-10-31 18:42:43 +00:00
Code Issues Activity Actions

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

Browse source 
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
Download patch file Download diff file Expand all files Collapse all files

16
Kernel/Graphics/Intel/NativeGraphicsAdapter.cpp
View file

@ -26,13 +26,15 @@ static bool is_supported_model(u16 device_id)
return false;
}
LockRefPtr<IntelNativeGraphicsAdapter> IntelNativeGraphicsAdapter::initialize(PCI::DeviceIdentifier const& pci_device_identifier)
ErrorOr<bool> IntelNativeGraphicsAdapter::probe(PCI::DeviceIdentifier const& pci_device_identifier)
{
VERIFY(pci_device_identifier.hardware_id().vendor_id == 0x8086);
if (!is_supported_model(pci_device_identifier.hardware_id().device_id))
return {};
auto adapter = adopt_lock_ref(*new IntelNativeGraphicsAdapter(pci_device_identifier.address()));
MUST(adapter->initialize_adapter());
return is_supported_model(pci_device_identifier.hardware_id().device_id);
}
ErrorOr<NonnullLockRefPtr<GenericGraphicsAdapter>> IntelNativeGraphicsAdapter::create(PCI::DeviceIdentifier const& pci_device_identifier)
{
auto adapter = TRY(adopt_nonnull_lock_ref_or_enomem(new (nothrow) IntelNativeGraphicsAdapter(pci_device_identifier.address())));
TRY(adapter->initialize_adapter());
return adapter;
}
@ -47,7 +49,7 @@ ErrorOr<void> IntelNativeGraphicsAdapter::initialize_adapter()
dmesgln_pci(*this, "framebuffer @ {}", PhysicalAddress(PCI::get_BAR2(address)));
PCI::enable_bus_mastering(address);
m_display_connector = IntelNativeDisplayConnector::must_create(PhysicalAddress(PCI::get_BAR2(address) & 0xfffffff0), bar2_space_size, PhysicalAddress(PCI::get_BAR0(address) & 0xfffffff0), bar0_space_size);
m_display_connector = TRY(IntelNativeDisplayConnector::try_create(PhysicalAddress(PCI::get_BAR2(address) & 0xfffffff0), bar2_space_size, PhysicalAddress(PCI::get_BAR0(address) & 0xfffffff0), bar0_space_size));
return {};
}