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Kernel/Net: Allocate regions before invoking Intel driver constructors

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Instead of allocating after the construction point ensure that all Intel
drivers are allocating necessary buffer regions and then pass them to
the constructors.
This could let us fail early in case of OOM, so we don't touch a network
adapter before we ensure we have all the appropriate mappings in place.
This commit is contained in:
Liav A 2022-12-17 21:43:11 +02:00 • committed by Jelle Raaijmakers
parent 301f9de915
commit 102186b0f5
4 changed files with 62 additions and 19 deletions
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32
Kernel/Net/Intel/E1000NetworkAdapter.cpp
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@ -168,9 +168,20 @@ UNMAP_AFTER_INIT ErrorOr<LockRefPtr<E1000NetworkAdapter>> E1000NetworkAdapter::t
u8 irq = pci_device_identifier.interrupt_line().value();
auto interface_name = TRY(NetworkingManagement::generate_interface_name_from_pci_address(pci_device_identifier));
auto registers_io_window = TRY(IOWindow::create_for_pci_device_bar(pci_device_identifier, PCI::HeaderType0BaseRegister::BAR0));
auto adapter = TRY(adopt_nonnull_lock_ref_or_enomem(new (nothrow) E1000NetworkAdapter(pci_device_identifier.address(), irq, move(registers_io_window), move(interface_name))));
adapter->m_rx_descriptors_region = TRY(MM.allocate_contiguous_kernel_region(TRY(Memory::page_round_up(sizeof(e1000_rx_desc) * number_of_rx_descriptors)), "E1000 RX Descriptors"sv, Memory::Region::Access::ReadWrite));
adapter->m_tx_descriptors_region = TRY(MM.allocate_contiguous_kernel_region(TRY(Memory::page_round_up(sizeof(e1000_tx_desc) * number_of_tx_descriptors)), "E1000 TX Descriptors"sv, Memory::Region::Access::ReadWrite));
auto rx_buffer_region = TRY(MM.allocate_contiguous_kernel_region(rx_buffer_size * number_of_rx_descriptors, "E1000 RX buffers"sv, Memory::Region::Access::ReadWrite));
auto tx_buffer_region = MM.allocate_contiguous_kernel_region(tx_buffer_size * number_of_tx_descriptors, "E1000 TX buffers"sv, Memory::Region::Access::ReadWrite).release_value();
auto rx_descriptors_region = TRY(MM.allocate_contiguous_kernel_region(TRY(Memory::page_round_up(sizeof(e1000_rx_desc) * number_of_rx_descriptors)), "E1000 RX Descriptors"sv, Memory::Region::Access::ReadWrite));
auto tx_descriptors_region = TRY(MM.allocate_contiguous_kernel_region(TRY(Memory::page_round_up(sizeof(e1000_tx_desc) * number_of_tx_descriptors)), "E1000 TX Descriptors"sv, Memory::Region::Access::ReadWrite));
auto adapter = TRY(adopt_nonnull_lock_ref_or_enomem(new (nothrow) E1000NetworkAdapter(pci_device_identifier.address(),
irq, move(registers_io_window),
move(rx_buffer_region),
move(tx_buffer_region),
move(rx_descriptors_region),
move(tx_descriptors_region),
move(interface_name))));
if (!adapter->initialize())
return Error::from_string_literal("E1000NetworkAdapter: Unable to initialize adapter");
return adapter;
@ -215,11 +226,18 @@ UNMAP_AFTER_INIT bool E1000NetworkAdapter::initialize()
return true;
}
UNMAP_AFTER_INIT E1000NetworkAdapter::E1000NetworkAdapter(PCI::Address address, u8 irq, NonnullOwnPtr<IOWindow> registers_io_window, NonnullOwnPtr<KString> interface_name)
UNMAP_AFTER_INIT E1000NetworkAdapter::E1000NetworkAdapter(PCI::Address address, u8 irq,
NonnullOwnPtr<IOWindow> registers_io_window, NonnullOwnPtr<Memory::Region> rx_buffer_region,
NonnullOwnPtr<Memory::Region> tx_buffer_region, NonnullOwnPtr<Memory::Region> rx_descriptors_region,
NonnullOwnPtr<Memory::Region> tx_descriptors_region, NonnullOwnPtr<KString> interface_name)
: NetworkAdapter(move(interface_name))
, PCI::Device(address)
, IRQHandler(irq)
, m_registers_io_window(move(registers_io_window))
, m_rx_descriptors_region(move(rx_descriptors_region))
, m_tx_descriptors_region(move(tx_descriptors_region))
, m_rx_buffer_region(move(rx_buffer_region))
, m_tx_buffer_region(move(tx_buffer_region))
{
}
@ -308,10 +326,7 @@ UNMAP_AFTER_INIT void E1000NetworkAdapter::read_mac_address()
UNMAP_AFTER_INIT void E1000NetworkAdapter::initialize_rx_descriptors()
{
auto* rx_descriptors = (e1000_tx_desc*)m_rx_descriptors_region->vaddr().as_ptr();
constexpr auto rx_buffer_size = 8192;
constexpr auto rx_buffer_page_count = rx_buffer_size / PAGE_SIZE;
m_rx_buffer_region = MM.allocate_contiguous_kernel_region(rx_buffer_size * number_of_rx_descriptors, "E1000 RX buffers"sv, Memory::Region::Access::ReadWrite).release_value();
for (size_t i = 0; i < number_of_rx_descriptors; ++i) {
auto& descriptor = rx_descriptors[i];
m_rx_buffers[i] = m_rx_buffer_region->vaddr().as_ptr() + rx_buffer_size * i;
@ -331,10 +346,7 @@ UNMAP_AFTER_INIT void E1000NetworkAdapter::initialize_rx_descriptors()
UNMAP_AFTER_INIT void E1000NetworkAdapter::initialize_tx_descriptors()
{
auto* tx_descriptors = (e1000_tx_desc*)m_tx_descriptors_region->vaddr().as_ptr();
constexpr auto tx_buffer_size = 8192;
constexpr auto tx_buffer_page_count = tx_buffer_size / PAGE_SIZE;
m_tx_buffer_region = MM.allocate_contiguous_kernel_region(tx_buffer_size * number_of_tx_descriptors, "E1000 TX buffers"sv, Memory::Region::Access::ReadWrite).release_value();
for (size_t i = 0; i < number_of_tx_descriptors; ++i) {
auto& descriptor = tx_descriptors[i];