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Kernel: Wait for NVMe controller to change enabled state

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We need to wait up to CAP.TO units of 500ms when changing CC.EN to
enable or disable the controller.
This commit is contained in:
Tom 2022-01-15 13:45:50 -07:00 • committed by Brian Gianforcaro
parent 8a879e205b
commit 0d65af5e0f
3 changed files with 61 additions and 15 deletions
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3
Kernel/Storage/NVMe/NVMeController.h
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@ -10,6 +10,7 @@
#include <AK/NonnullRefPtrVector.h>
#include <AK/OwnPtr.h>
#include <AK/RefPtr.h>
#include <AK/Time.h>
#include <AK/Tuple.h>
#include <AK/Types.h>
#include <Kernel/Bus/PCI/Device.h>
@ -63,6 +64,7 @@ private:
{
m_dbl_stride = (m_controller_regs->cap >> CAP_DBL_SHIFT) & CAP_DBL_MASK;
}
bool wait_for_ready(bool);
private:
PCI::DeviceIdentifier m_pci_device_id;
@ -72,6 +74,7 @@ private:
Memory::TypedMapping<volatile ControllerRegister> m_controller_regs;
bool m_admin_queue_ready { false };
size_t m_device_count {};
AK::Time m_ready_timeout;
u32 m_bar;
u8 m_dbl_stride;
static Atomic<u8> controller_id;