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Kernel/Storage: Don't use interrupts when resetting SATA AHCI devices

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Don't use interrupts when trying to reset a device that is connected to
a port on the AHCI controller, and instead poll for changes in status to
break out from the loop. At the worst case scenario we can wait 0.01
seconds for each SATA reset.
This commit is contained in:
Liav A 2021-11-13 13:07:55 +02:00 • committed by Andreas Kling
parent c0d6e37ab3
commit 3ea49259df
2 changed files with 12 additions and 20 deletions
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30
Kernel/Storage/ATA/AHCIPort.cpp
View file

@ -250,7 +250,7 @@ bool AHCIPort::reset()
full_memory_barrier();
clear_sata_error_register();
full_memory_barrier();
if (!initiate_sata_reset(lock)) {
if (!initiate_sata_reset()) {
return false;
}
return initialize();
@ -780,7 +780,7 @@ void AHCIPort::stop_fis_receiving() const
m_port_registers.cmd = m_port_registers.cmd & 0xFFFFFFEF;
}
bool AHCIPort::initiate_sata_reset(SpinlockLocker<Spinlock>& main_lock)
bool AHCIPort::initiate_sata_reset()
{
VERIFY(m_lock.is_locked());
VERIFY(m_hard_lock.is_locked());
@ -802,24 +802,16 @@ bool AHCIPort::initiate_sata_reset(SpinlockLocker<Spinlock>& main_lock)
set_interface_state(AHCI::DeviceDetectionInitialization::PerformInterfaceInitializationSequence);
// The AHCI specification says to wait now a 1 millisecond
IO::delay(1000);
// FIXME: Find a better way to opt-out temporarily from Scoped locking!
{
main_lock.unlock();
VERIFY_INTERRUPTS_ENABLED();
full_memory_barrier();
set_interface_state(AHCI::DeviceDetectionInitialization::NoActionRequested);
full_memory_barrier();
if (m_wait_connect_for_completion) {
retry = 0;
while (retry < 100000) {
if (is_phy_enabled())
break;
full_memory_barrier();
set_interface_state(AHCI::DeviceDetectionInitialization::NoActionRequested);
full_memory_barrier();
retry = 0;
while (retry < 1000) {
if (is_phy_enabled())
break;
IO::delay(10);
retry++;
}
}
main_lock.lock();
IO::delay(10);
retry++;
}
dmesgln("AHCI Port {}: {}", representative_port_index(), try_disambiguate_sata_status());

2
Kernel/Storage/ATA/AHCIPort.h
View file

@ -64,7 +64,7 @@ private:
const char* try_disambiguate_sata_status();
void try_disambiguate_sata_error();
bool initiate_sata_reset(SpinlockLocker<Spinlock>&);
bool initiate_sata_reset();
void rebase();
void recover_from_fatal_error();
bool shutdown();