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Kernel: Convert PCI Capability struct to class with convenience methods

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Based on pull #3236 by tomuta

Co-authored-by: Tom <tomut@yahoo.com>
This commit is contained in:
Idan Horowitz 2021-01-02 19:33:30 +02:00 • committed by Andreas Kling
parent dfb23babbb
commit 172d23deae
3 changed files with 61 additions and 7 deletions
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32
Kernel/PCI/Definitions.h
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@ -67,6 +67,11 @@ namespace Kernel {
#define PCI_MAX_BUSES 256
#define PCI_MAX_FUNCTIONS_PER_DEVICE 8
#define PCI_CAPABILITY_NULL 0x0
#define PCI_CAPABILITY_MSI 0x5
#define PCI_CAPABILITY_VENDOR_SPECIFIC 0x9
#define PCI_CAPABILITY_MSIX 0x11
namespace PCI {
struct ID {
u16 vendor_id { 0 };
@ -171,9 +176,28 @@ struct ChangeableAddress : public Address {
}
};
struct Capability {
u8 m_id;
u8 m_next_pointer;
class Capability {
public:
Capability(const Address& address, u8 id, u8 ptr)
: m_address(address)
, m_id(id)
, m_ptr(ptr)
{
}
u8 id() const { return m_id; }
u8 read8(u32) const;
u16 read16(u32) const;
u32 read32(u32) const;
void write8(u32, u8);
void write16(u32, u16);
void write32(u32, u32);
private:
Address m_address;
const u8 m_id;
const u8 m_ptr;
};
class PhysicalID {
@ -185,7 +209,7 @@ public:
{
if constexpr (PCI_DEBUG) {
for (auto capability : capabilities)
dbgln("{} has capability {}", address, capability.m_id);
dbgln("{} has capability {}", address, capability.id());
}
}