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Kernel: Make kernel region allocators return KResultOr<NOP<Region>>

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This expands the reach of error propagation greatly throughout the
kernel. Sadly, it also exposes the fact that we're allocating (and
doing other fallible things) in constructors all over the place.

This patch doesn't attempt to address that of course. That's work for
our future selves.
This commit is contained in:
Andreas Kling 2021-09-06 01:36:14 +02:00
parent cb71a73708
commit 75564b4a5f
40 changed files with 173 additions and 193 deletions
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13
Kernel/Net/E1000NetworkAdapter.cpp
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@ -195,9 +195,10 @@ UNMAP_AFTER_INIT bool E1000NetworkAdapter::initialize()
m_io_base = IOAddress(PCI::get_BAR1(pci_address()) & ~1);
size_t mmio_base_size = PCI::get_BAR_space_size(pci_address(), 0);
m_mmio_region = MM.allocate_kernel_region(PhysicalAddress(page_base_of(PCI::get_BAR0(pci_address()))), Memory::page_round_up(mmio_base_size), "E1000 MMIO", Memory::Region::Access::ReadWrite, Memory::Region::Cacheable::No);
if (!m_mmio_region)
auto region_or_error = MM.allocate_kernel_region(PhysicalAddress(page_base_of(PCI::get_BAR0(pci_address()))), Memory::page_round_up(mmio_base_size), "E1000 MMIO", Memory::Region::Access::ReadWrite, Memory::Region::Cacheable::No);
if (region_or_error.is_error())
return false;
m_mmio_region = region_or_error.release_value();
m_mmio_base = m_mmio_region->vaddr();
m_use_mmio = true;
m_interrupt_line = PCI::get_interrupt_line(pci_address());
@ -222,8 +223,8 @@ UNMAP_AFTER_INIT bool E1000NetworkAdapter::initialize()
UNMAP_AFTER_INIT E1000NetworkAdapter::E1000NetworkAdapter(PCI::Address address, u8 irq)
: PCI::Device(address)
, IRQHandler(irq)
, m_rx_descriptors_region(MM.allocate_contiguous_kernel_region(Memory::page_round_up(sizeof(e1000_rx_desc) * number_of_rx_descriptors + 16), "E1000 RX Descriptors", Memory::Region::Access::ReadWrite))
, m_tx_descriptors_region(MM.allocate_contiguous_kernel_region(Memory::page_round_up(sizeof(e1000_tx_desc) * number_of_tx_descriptors + 16), "E1000 TX Descriptors", Memory::Region::Access::ReadWrite))
, m_rx_descriptors_region(MM.allocate_contiguous_kernel_region(Memory::page_round_up(sizeof(e1000_rx_desc) * number_of_rx_descriptors + 16), "E1000 RX Descriptors", Memory::Region::Access::ReadWrite).release_value())
, m_tx_descriptors_region(MM.allocate_contiguous_kernel_region(Memory::page_round_up(sizeof(e1000_tx_desc) * number_of_tx_descriptors + 16), "E1000 TX Descriptors", Memory::Region::Access::ReadWrite).release_value())
{
set_interface_name(pci_address());
}
@ -321,7 +322,7 @@ UNMAP_AFTER_INIT void E1000NetworkAdapter::initialize_rx_descriptors()
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", Memory::Region::Access::ReadWrite);
m_rx_buffer_region = MM.allocate_contiguous_kernel_region(rx_buffer_size * number_of_rx_descriptors, "E1000 RX buffers", 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;
@ -344,7 +345,7 @@ UNMAP_AFTER_INIT void E1000NetworkAdapter::initialize_tx_descriptors()
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", Memory::Region::Access::ReadWrite);
m_tx_buffer_region = MM.allocate_contiguous_kernel_region(tx_buffer_size * number_of_tx_descriptors, "E1000 TX buffers", Memory::Region::Access::ReadWrite).release_value();
for (size_t i = 0; i < number_of_tx_descriptors; ++i) {
auto& descriptor = tx_descriptors[i];