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Kernel: Add write{8,16,32} to the PCI Capability struct

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MSI(x) mechanism requires the device to write to its Capability
structure. Add write{8,16,32} similar to read{8,16,32}.
This commit is contained in:
Pankaj Raghav 2023-04-28 14:54:00 +02:00 committed by Jelle Raaijmakers
parent 91da264a4c
commit 71c75873c9
Notes: sideshowbarker 2024-07-17 06:35:16 +09:00 
Author: https://github.com/Panky-codes
Commit: https://github.com/SerenityOS/serenity/commit/71c75873c9
Pull-request: https://github.com/SerenityOS/serenity/pull/18580
Reviewed-by: https://github.com/gmta ✅
Reviewed-by: https://github.com/kleinesfilmroellchen
Reviewed-by: https://github.com/supercomputer7 ✅
2 changed files with 24 additions and 0 deletions
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21
Kernel/Bus/PCI/API.cpp
View File

@ -285,6 +285,27 @@ u32 Capability::read32(size_t offset) const
return read32_offsetted(identifier, m_ptr + offset);
}
void Capability::write8(size_t offset, u8 value) const
{
auto& identifier = get_device_identifier(m_address);
SpinlockLocker locker(identifier.operation_lock());
write8_offsetted(identifier, m_ptr + offset, value);
}
void Capability::write16(size_t offset, u16 value) const
{
auto& identifier = get_device_identifier(m_address);
SpinlockLocker locker(identifier.operation_lock());
write16_offsetted(identifier, m_ptr + offset, value);
}
void Capability::write32(size_t offset, u32 value) const
{
auto& identifier = get_device_identifier(m_address);
SpinlockLocker locker(identifier.operation_lock());
write32_offsetted(identifier, m_ptr + offset, value);
}
DeviceIdentifier const& get_device_identifier(Address address)
{
return Access::the().get_device_identifier(address);

3
Kernel/Bus/PCI/Definitions.h
View File

@ -238,6 +238,9 @@ public:
u8 read8(size_t offset) const;
u16 read16(size_t offset) const;
u32 read32(size_t offset) const;
void write8(size_t offset, u8 value) const;
void write16(size_t offset, u16 value) const;
void write32(size_t offset, u32 value) const;
private:
const Address m_address;