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Kernel: Remove ref-counting from interrupt override metadata

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I don't see a reason for these to be reference-counted, and removing it
simplifies a bunch of surrounding data structures.
This commit is contained in:
Andreas Kling 2020-05-08 21:07:04 +02:00
parent d87f875552
commit d92f62db43
6 changed files with 66 additions and 117 deletions
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18
Kernel/Interrupts/IOAPIC.cpp
View file

@ -66,12 +66,11 @@ void IOAPIC::map_interrupt_redirection(u8 interrupt_vector)
{
InterruptDisabler disabler;
for (auto redirection_override : InterruptManagement::the().isa_overrides()) {
ASSERT(!redirection_override.is_null());
if (redirection_override->source() != interrupt_vector)
if (redirection_override.source() != interrupt_vector)
continue;
bool active_low;
// See ACPI spec Version 6.2, page 205 to learn more about Interrupt Overriding Flags.
switch ((redirection_override->flags() & 0b11)) {
switch ((redirection_override.flags() & 0b11)) {
case 0:
active_low = false;
break;
@ -87,7 +86,7 @@ void IOAPIC::map_interrupt_redirection(u8 interrupt_vector)
bool trigger_level_mode;
// See ACPI spec Version 6.2, page 205 to learn more about Interrupt Overriding Flags.
switch (((redirection_override->flags() >> 2) & 0b11)) {
switch (((redirection_override.flags() >> 2) & 0b11)) {
case 0:
trigger_level_mode = false;
break;
@ -100,7 +99,7 @@ void IOAPIC::map_interrupt_redirection(u8 interrupt_vector)
trigger_level_mode = true;
break;
}
configure_redirection_entry(redirection_override->gsi() - gsi_base(), InterruptManagement::acquire_mapped_interrupt_number(redirection_override->source()) + IRQ_VECTOR_BASE, DeliveryMode::Normal, false, active_low, trigger_level_mode, true, 0);
configure_redirection_entry(redirection_override.gsi() - gsi_base(), InterruptManagement::acquire_mapped_interrupt_number(redirection_override.source()) + IRQ_VECTOR_BASE, DeliveryMode::Normal, false, active_low, trigger_level_mode, true, 0);
return;
}
isa_identity_map(interrupt_vector);
@ -135,12 +134,11 @@ void IOAPIC::map_isa_interrupts()
{
InterruptDisabler disabler;
for (auto redirection_override : InterruptManagement::the().isa_overrides()) {
ASSERT(!redirection_override.is_null());
if ((redirection_override->gsi() < gsi_base()) || (redirection_override->gsi() >= (gsi_base() + m_redirection_entries_count)))
if ((redirection_override.gsi() < gsi_base()) || (redirection_override.gsi() >= (gsi_base() + m_redirection_entries_count)))
continue;
bool active_low;
// See ACPI spec Version 6.2, page 205 to learn more about Interrupt Overriding Flags.
switch ((redirection_override->flags() & 0b11)) {
switch ((redirection_override.flags() & 0b11)) {
case 0:
active_low = false;
break;
@ -156,7 +154,7 @@ void IOAPIC::map_isa_interrupts()
bool trigger_level_mode;
// See ACPI spec Version 6.2, page 205 to learn more about Interrupt Overriding Flags.
switch (((redirection_override->flags() >> 2) & 0b11)) {
switch (((redirection_override.flags() >> 2) & 0b11)) {
case 0:
trigger_level_mode = false;
break;
@ -169,7 +167,7 @@ void IOAPIC::map_isa_interrupts()
trigger_level_mode = true;
break;
}
configure_redirection_entry(redirection_override->gsi() - gsi_base(), InterruptManagement::acquire_mapped_interrupt_number(redirection_override->source()) + IRQ_VECTOR_BASE, 0, false, active_low, trigger_level_mode, true, 0);
configure_redirection_entry(redirection_override.gsi() - gsi_base(), InterruptManagement::acquire_mapped_interrupt_number(redirection_override.source()) + IRQ_VECTOR_BASE, 0, false, active_low, trigger_level_mode, true, 0);
}
}

22
Kernel/Interrupts/IOAPIC.h
View file

@ -36,8 +36,26 @@ struct [[gnu::packed]] ioapic_mmio_regs
volatile u32 window;
};
class ISAInterruptOverrideMetadata;
class PCIInterruptOverrideMetadata;
class PCIInterruptOverrideMetadata {
public:
PCIInterruptOverrideMetadata(u8 bus_id, u8 polarity, u8 trigger_mode, u8 source_irq, u32 ioapic_id, u16 ioapic_int_pin);
u8 bus() const { return m_bus_id; }
u8 polarity() const { return m_polarity; }
u8 trigger_mode() const { return m_trigger_mode; }
u8 pci_interrupt_pin() const { return m_pci_interrupt_pin; }
u8 pci_device_number() const { return m_pci_device_number; }
u32 ioapic_id() const { return m_ioapic_id; }
u16 ioapic_interrupt_pin() const { return m_ioapic_interrupt_pin; }
private:
const u8 m_bus_id;
const u8 m_polarity;
const u8 m_trigger_mode;
const u8 m_pci_interrupt_pin;
const u8 m_pci_device_number;
const u32 m_ioapic_id;
const u16 m_ioapic_interrupt_pin;
};
class IOAPIC final : public IRQController {
public:

34
Kernel/Interrupts/InterruptManagement.cpp
View file

@ -83,11 +83,6 @@ IRQController& InterruptManagement::get_interrupt_controller(int index)
return *m_interrupt_controllers[index];
}
Vector<RefPtr<ISAInterruptOverrideMetadata>> InterruptManagement::isa_overrides()
{
return m_isa_interrupt_overrides;
}
u8 InterruptManagement::acquire_mapped_interrupt_number(u8 original_irq)
{
if (!InterruptManagement::initialized()) {
@ -223,11 +218,11 @@ void InterruptManagement::locate_apic_data()
}
if (madt_entry->type == (u8)ACPI::Structures::MADTEntryType::InterruptSourceOverride) {
auto* interrupt_override_entry = (const ACPI::Structures::MADTEntries::InterruptSourceOverride*)madt_entry;
m_isa_interrupt_overrides.append(adopt(*new ISAInterruptOverrideMetadata(
m_isa_interrupt_overrides.empend(
interrupt_override_entry->bus,
interrupt_override_entry->source,
interrupt_override_entry->global_system_interrupt,
interrupt_override_entry->flags)));
interrupt_override_entry->flags);
dbg() << "Interrupts: Overriding INT 0x" << String::format("%x", interrupt_override_entry->source) << " with GSI " << interrupt_override_entry->global_system_interrupt << ", for bus 0x" << String::format("%x", interrupt_override_entry->bus);
}
madt_entry = (ACPI::Structures::MADTEntryHeader*)(VirtualAddress((u32)madt_entry).offset(entry_length).get());
@ -235,33 +230,10 @@ void InterruptManagement::locate_apic_data()
entry_index++;
}
}
void InterruptManagement::locate_pci_interrupt_overrides()
{
m_pci_interrupt_overrides = MultiProcessorParser::the().get_pci_interrupt_redirections();
}
ISAInterruptOverrideMetadata::ISAInterruptOverrideMetadata(u8 bus, u8 source, u32 global_system_interrupt, u16 flags)
: m_bus(bus)
, m_source(source)
, m_global_system_interrupt(global_system_interrupt)
, m_flags(flags)
{
}
u8 ISAInterruptOverrideMetadata::bus() const
{
return m_bus;
}
u8 ISAInterruptOverrideMetadata::source() const
{
return m_source;
}
u32 ISAInterruptOverrideMetadata::gsi() const
{
return m_global_system_interrupt;
}
u16 ISAInterruptOverrideMetadata::flags() const
{
return m_flags;
}
}

42
Kernel/Interrupts/InterruptManagement.h
View file

@ -40,7 +40,27 @@
namespace Kernel {
class ISAInterruptOverrideMetadata;
class ISAInterruptOverrideMetadata {
public:
ISAInterruptOverrideMetadata(u8 bus, u8 source, u32 global_system_interrupt, u16 flags)
: m_bus(bus)
, m_source(source)
, m_global_system_interrupt(global_system_interrupt)
, m_flags(flags)
{
}
u8 bus() const { return m_bus; }
u8 source() const { return m_source; }
u32 gsi() const { return m_global_system_interrupt; }
u16 flags() const { return m_flags; }
private:
const u8 m_bus;
const u8 m_source;
const u32 m_global_system_interrupt;
const u16 m_flags;
};
class InterruptManagement {
public:
@ -56,7 +76,7 @@ public:
bool smp_enabled() const { return m_smp_enabled; }
RefPtr<IRQController> get_responsible_irq_controller(u8 interrupt_vector);
Vector<RefPtr<ISAInterruptOverrideMetadata>> isa_overrides();
const Vector<ISAInterruptOverrideMetadata>& isa_overrides() const { return m_isa_interrupt_overrides; }
u8 get_mapped_interrupt_vector(u8 original_irq);
u8 get_irq_vector(u8 mapped_interrupt_vector);
@ -71,23 +91,9 @@ private:
void locate_pci_interrupt_overrides();
bool m_smp_enabled { false };
FixedArray<RefPtr<IRQController>> m_interrupt_controllers { 1 };
Vector<RefPtr<ISAInterruptOverrideMetadata>> m_isa_interrupt_overrides;
Vector<RefPtr<PCIInterruptOverrideMetadata>> m_pci_interrupt_overrides;
Vector<ISAInterruptOverrideMetadata> m_isa_interrupt_overrides;
Vector<PCIInterruptOverrideMetadata> m_pci_interrupt_overrides;
PhysicalAddress m_madt;
};
class ISAInterruptOverrideMetadata : public RefCounted<ISAInterruptOverrideMetadata> {
public:
ISAInterruptOverrideMetadata(u8 bus, u8 source, u32 global_system_interrupt, u16 flags);
u8 bus() const;
u8 source() const;
u32 gsi() const;
u16 flags() const;
private:
u8 m_bus;
u8 m_source;
u32 m_global_system_interrupt;
u16 m_flags;
};
}