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Kernel/AHCI: Add a boot argument to force AHCI to operate on IRQ 11

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As a compromise, if the fimrware decided to set the IRQ line to be 7,
or something else we can't deal with, the user can simply force the code
to work with IRQ 11, with the boot argument "force_ahci_irq_11" being
set to "on".
This commit is contained in:
Liav A 2021-03-19 04:51:40 +02:00 committed by Andreas Kling
parent 36a82188a8
commit cfc2f33dcb
Notes: sideshowbarker 2024-07-18 21:11:42 +09:00 
Author: https://github.com/supercomputer7
Commit: https://github.com/SerenityOS/serenity/commit/cfc2f33dcba
Pull-request: https://github.com/SerenityOS/serenity/pull/5865
Reviewed-by: https://github.com/bgianfo
Reviewed-by: https://github.com/tomuta
3 changed files with 13 additions and 0 deletions
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5
Kernel/CommandLine.cpp
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@ -113,6 +113,11 @@ UNMAP_AFTER_INIT bool CommandLine::is_mmio_enabled() const
return lookup("pci_mmio").value_or("off") == "on";
}
UNMAP_AFTER_INIT bool CommandLine::is_forcing_irq_11_for_ahci() const
{
return lookup("force_ahci_irq_11").value_or("off") == "on";
}
UNMAP_AFTER_INIT bool CommandLine::is_legacy_time_enabled() const
{
return lookup("time").value_or("modern") == "legacy";

1
Kernel/CommandLine.h
View file

@ -73,6 +73,7 @@ public:
[[nodiscard]] bool is_vmmouse_enabled() const;
[[nodiscard]] bool is_mmio_enabled() const;
[[nodiscard]] bool is_legacy_time_enabled() const;
[[nodiscard]] bool is_forcing_irq_11_for_ahci() const;
[[nodiscard]] bool is_text_mode() const;
[[nodiscard]] bool is_force_pio() const;
[[nodiscard]] AcpiFeatureLevel acpi_feature_level() const;

7
Kernel/Storage/AHCIController.cpp
View file

@ -172,6 +172,13 @@ void AHCIController::initialize()
hba().control_regs.ghc = 0x80000000; // Ensure that HBA knows we are AHCI aware.
PCI::enable_interrupt_line(pci_address());
PCI::enable_bus_mastering(pci_address());
// FIXME: This is a hack for VMWare (and possibly other hardware) that set
// the IRQ line to 7 or other weird value. Find a better way to set this
// with balancing IRQ sharing in mind.
if (kernel_command_line().is_forcing_irq_11_for_ahci())
PCI::set_interrupt_line(pci_address(), 11);
enable_global_interrupts();
m_handlers.append(AHCIPortHandler::create(*this, PCI::get_interrupt_line(pci_address()),
AHCI::MaskedBitField((volatile u32&)(hba().control_regs.pi))));