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

Browse source 
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
Download patch file Download diff file Expand all files Collapse all files

4
Kernel/Arch/PC/BIOS.cpp
View file

@ -162,7 +162,7 @@ Memory::MappedROM map_bios()
Memory::MappedROM mapping;
mapping.size = 128 * KiB;
mapping.paddr = PhysicalAddress(0xe0000);
mapping.region = MM.allocate_kernel_region(mapping.paddr, Memory::page_round_up(mapping.size), {}, Memory::Region::Access::Read);
mapping.region = MM.allocate_kernel_region(mapping.paddr, Memory::page_round_up(mapping.size), {}, Memory::Region::Access::Read).release_value();
return mapping;
}
@ -176,7 +176,7 @@ Memory::MappedROM map_ebda()
size_t ebda_size = (*ebda_length_ptr_b1 << 8) | *ebda_length_ptr_b0;
Memory::MappedROM mapping;
mapping.region = MM.allocate_kernel_region(ebda_paddr.page_base(), Memory::page_round_up(ebda_size), {}, Memory::Region::Access::Read);
mapping.region = MM.allocate_kernel_region(ebda_paddr.page_base(), Memory::page_round_up(ebda_size), {}, Memory::Region::Access::Read).release_value();
mapping.offset = ebda_paddr.offset_in_page();
mapping.size = ebda_size;
mapping.paddr = ebda_paddr;

8
Kernel/Bus/PCI/MMIOAccess.cpp
View file

@ -57,7 +57,7 @@ UNMAP_AFTER_INIT MMIOAccess::MMIOAccess(PhysicalAddress p_mcfg)
{
dmesgln("PCI: Using MMIO for PCI configuration space access");
auto checkup_region = MM.allocate_kernel_region(p_mcfg.page_base(), (PAGE_SIZE * 2), "PCI MCFG Checkup", Memory::Region::Access::ReadWrite);
auto checkup_region = MM.allocate_kernel_region(p_mcfg.page_base(), (PAGE_SIZE * 2), "PCI MCFG Checkup", Memory::Region::Access::ReadWrite).release_value();
dbgln_if(PCI_DEBUG, "PCI: Checking MCFG Table length to choose the correct mapping size");
auto* sdt = (ACPI::Structures::SDTHeader*)checkup_region->vaddr().offset(p_mcfg.offset_in_page()).as_ptr();
u32 length = sdt->length;
@ -66,7 +66,7 @@ UNMAP_AFTER_INIT MMIOAccess::MMIOAccess(PhysicalAddress p_mcfg)
dbgln("PCI: MCFG, length: {}, revision: {}", length, revision);
checkup_region->unmap();
auto mcfg_region = MM.allocate_kernel_region(p_mcfg.page_base(), Memory::page_round_up(length) + PAGE_SIZE, "PCI Parsing MCFG", Memory::Region::Access::ReadWrite);
auto mcfg_region = MM.allocate_kernel_region(p_mcfg.page_base(), Memory::page_round_up(length) + PAGE_SIZE, "PCI Parsing MCFG", Memory::Region::Access::ReadWrite).release_value();
auto& mcfg = *(ACPI::Structures::MCFG*)mcfg_region->vaddr().offset(p_mcfg.offset_in_page()).as_ptr();
dbgln_if(PCI_DEBUG, "PCI: Checking MCFG @ {}, {}", VirtualAddress(&mcfg), PhysicalAddress(p_mcfg.get()));
@ -89,7 +89,7 @@ UNMAP_AFTER_INIT MMIOAccess::MMIOAccess(PhysicalAddress p_mcfg)
// PCI::PhysicalID objects to the vector, because get_capabilities calls
// PCI::read16 which will need this region to be mapped.
u8 start_bus = m_segments.get(0).value().get_start_bus();
m_mapped_region = MM.allocate_kernel_region(determine_memory_mapped_bus_region(0, start_bus), MEMORY_RANGE_PER_BUS, "PCI ECAM", Memory::Region::Access::ReadWrite);
m_mapped_region = MM.allocate_kernel_region(determine_memory_mapped_bus_region(0, start_bus), MEMORY_RANGE_PER_BUS, "PCI ECAM", Memory::Region::Access::ReadWrite).release_value();
m_mapped_bus = start_bus;
dbgln_if(PCI_DEBUG, "PCI: First PCI ECAM Mapped region for starting bus {} @ {} {}", start_bus, m_mapped_region->vaddr(), m_mapped_region->physical_page(0)->paddr());
@ -102,7 +102,7 @@ void MMIOAccess::map_bus_region(u32 segment, u8 bus)
VERIFY(m_access_lock.is_locked());
if (m_mapped_bus == bus)
return;
m_mapped_region = MM.allocate_kernel_region(determine_memory_mapped_bus_region(segment, bus), MEMORY_RANGE_PER_BUS, "PCI ECAM", Memory::Region::Access::ReadWrite);
m_mapped_region = MM.allocate_kernel_region(determine_memory_mapped_bus_region(segment, bus), MEMORY_RANGE_PER_BUS, "PCI ECAM", Memory::Region::Access::ReadWrite).release_value();
m_mapped_bus = bus;
dbgln_if(PCI_DEBUG, "PCI: New PCI ECAM Mapped region for bus {} @ {} {}", bus, m_mapped_region->vaddr(), m_mapped_region->physical_page(0)->paddr());
}

2
Kernel/Bus/PCI/WindowedMMIOAccess.cpp
View file

@ -18,7 +18,7 @@ namespace PCI {
UNMAP_AFTER_INIT DeviceConfigurationSpaceMapping::DeviceConfigurationSpaceMapping(Address device_address, const MMIOAccess::MMIOSegment& mmio_segment)
: m_device_address(device_address)
, m_mapped_region(MM.allocate_kernel_region(Memory::page_round_up(PCI_MMIO_CONFIG_SPACE_SIZE), "PCI MMIO Device Access", Memory::Region::Access::ReadWrite).release_nonnull())
, m_mapped_region(MM.allocate_kernel_region(Memory::page_round_up(PCI_MMIO_CONFIG_SPACE_SIZE), "PCI MMIO Device Access", Memory::Region::Access::ReadWrite).release_value())
{
PhysicalAddress segment_lower_addr = mmio_segment.get_paddr();
PhysicalAddress device_physical_mmio_space = segment_lower_addr.offset(

8
Kernel/Bus/USB/UHCI/UHCIController.cpp
View file

@ -108,7 +108,7 @@ KResult UHCIController::reset()
// Let's allocate the physical page for the Frame List (which is 4KiB aligned)
auto vmobject = TRY(Memory::AnonymousVMObject::try_create_physically_contiguous_with_size(PAGE_SIZE));
m_framelist = MM.allocate_kernel_region_with_vmobject(move(vmobject), PAGE_SIZE, "UHCI Framelist", Memory::Region::Access::Write);
m_framelist = TRY(MM.allocate_kernel_region_with_vmobject(move(vmobject), PAGE_SIZE, "UHCI Framelist", Memory::Region::Access::Write));
dbgln("UHCI: Allocated framelist at physical address {}", m_framelist->physical_page(0)->paddr());
dbgln("UHCI: Framelist is at virtual address {}", m_framelist->vaddr());
write_sofmod(64); // 1mS frame time
@ -144,11 +144,7 @@ UNMAP_AFTER_INIT KResult UHCIController::create_structures()
m_transfer_descriptor_pool = TRY(UHCIDescriptorPool<TransferDescriptor>::try_create("Transfer Descriptor Pool"sv));
m_isochronous_transfer_pool = MM.allocate_kernel_region_with_vmobject(move(td_pool_vmobject), PAGE_SIZE, "UHCI Isochronous Descriptor Pool", Memory::Region::Access::ReadWrite);
if (!m_isochronous_transfer_pool) {
dmesgln("UHCI: Failed to allocated Isochronous Descriptor Pool!");
return ENOMEM;
}
m_isochronous_transfer_pool = TRY(MM.allocate_kernel_region_with_vmobject(move(td_pool_vmobject), PAGE_SIZE, "UHCI Isochronous Descriptor Pool", Memory::Region::Access::ReadWrite));
// Set up the Isochronous Transfer Descriptor list
m_iso_td_list.resize(UHCI_NUMBER_OF_ISOCHRONOUS_TDS);

7
Kernel/Bus/USB/UHCI/UHCIDescriptorPool.h
View file

@ -30,11 +30,8 @@ class UHCIDescriptorPool {
public:
static KResultOr<NonnullOwnPtr<UHCIDescriptorPool<T>>> try_create(StringView name)
{
auto pool_memory_block = MM.allocate_kernel_region(PAGE_SIZE, "UHCI Descriptor Pool", Memory::Region::Access::ReadWrite);
if (!pool_memory_block)
return ENOMEM;
return adopt_nonnull_own_or_enomem(new (nothrow) UHCIDescriptorPool(pool_memory_block.release_nonnull(), name));
auto pool_memory_block = TRY(MM.allocate_kernel_region(PAGE_SIZE, "UHCI Descriptor Pool", Memory::Region::Access::ReadWrite));
return adopt_nonnull_own_or_enomem(new (nothrow) UHCIDescriptorPool(move(pool_memory_block), name));
}
~UHCIDescriptorPool() = default;

9
Kernel/Bus/USB/USBTransfer.cpp
View file

@ -9,15 +9,12 @@
namespace Kernel::USB {
KResultOr<NonnullRefPtr<Transfer>> Transfer::try_create(Pipe& pipe, u16 len)
KResultOr<NonnullRefPtr<Transfer>> Transfer::try_create(Pipe& pipe, u16 length)
{
// Initialize data buffer for transfer
// This will definitely need to be refactored in the future, I doubt this will scale well...
auto data_buffer = MM.allocate_kernel_region(PAGE_SIZE, "USB Transfer Buffer", Memory::Region::Access::ReadWrite);
if (!data_buffer)
return ENOMEM;
return adopt_nonnull_ref_or_enomem(new (nothrow) Transfer(pipe, len, data_buffer.release_nonnull()));
auto region = TRY(MM.allocate_kernel_region(PAGE_SIZE, "USB Transfer Buffer", Memory::Region::Access::ReadWrite));
return adopt_nonnull_ref_or_enomem(new (nothrow) Transfer(pipe, length, move(region)));
}
Transfer::Transfer(Pipe& pipe, u16 len, NonnullOwnPtr<Memory::Region> data_buffer)

11
Kernel/Bus/VirtIO/Device.cpp
View file

@ -147,11 +147,14 @@ auto Device::mapping_for_bar(u8 bar) -> MappedMMIO&
{
VERIFY(m_use_mmio);
auto& mapping = m_mmio[bar];
if (!mapping.base) {
if (!mapping.base && mapping.size) {
auto region_or_error = MM.allocate_kernel_region(PhysicalAddress(page_base_of(PCI::get_BAR(pci_address(), bar))), Memory::page_round_up(mapping.size), "VirtIO MMIO", Memory::Region::Access::ReadWrite, Memory::Region::Cacheable::No);
if (region_or_error.is_error()) {
dbgln("{}: Failed to map bar {} - (size={}) {}", VirtIO::determine_device_class(pci_address()), bar, mapping.size, region_or_error.error());
} else {
mapping.size = PCI::get_BAR_space_size(pci_address(), bar);
mapping.base = MM.allocate_kernel_region(PhysicalAddress(page_base_of(PCI::get_BAR(pci_address(), bar))), Memory::page_round_up(mapping.size), "VirtIO MMIO", Memory::Region::Access::ReadWrite, Memory::Region::Cacheable::No);
if (!mapping.base)
dbgln("{}: Failed to map bar {}", VirtIO::determine_device_class(pci_address()), bar);
mapping.base = region_or_error.release_value();
}
}
return mapping;
}

5
Kernel/Bus/VirtIO/Queue.cpp
View file

@ -19,10 +19,9 @@ Queue::Queue(u16 queue_size, u16 notify_offset)
size_t size_of_device = sizeof(QueueDevice) + queue_size * sizeof(QueueDeviceItem);
auto queue_region_size = Memory::page_round_up(size_of_descriptors + size_of_driver + size_of_device);
if (queue_region_size <= PAGE_SIZE)
m_queue_region = MM.allocate_kernel_region(queue_region_size, "VirtIO Queue", Memory::Region::Access::ReadWrite);
m_queue_region = MM.allocate_kernel_region(queue_region_size, "VirtIO Queue", Memory::Region::Access::ReadWrite).release_value();
else
m_queue_region = MM.allocate_contiguous_kernel_region(queue_region_size, "VirtIO Queue", Memory::Region::Access::ReadWrite);
VERIFY(m_queue_region);
m_queue_region = MM.allocate_contiguous_kernel_region(queue_region_size, "VirtIO Queue", Memory::Region::Access::ReadWrite).release_value();
// TODO: ensure alignment!!!
u8* ptr = m_queue_region->vaddr().as_ptr();
memset(ptr, 0, m_queue_region->size());

2
Kernel/Bus/VirtIO/RNG.cpp
View file

@ -25,7 +25,7 @@ UNMAP_AFTER_INIT void RNG::initialize()
}
if (success) {
finish_init();
m_entropy_buffer = MM.allocate_contiguous_kernel_region(PAGE_SIZE, "VirtIO::RNG", Memory::Region::Access::ReadWrite);
m_entropy_buffer = MM.allocate_contiguous_kernel_region(PAGE_SIZE, "VirtIO::RNG", Memory::Region::Access::ReadWrite).release_value();
if (m_entropy_buffer) {
memset(m_entropy_buffer->vaddr().as_ptr(), 0, m_entropy_buffer->size());
request_entropy_from_host();

6
Kernel/Devices/KCOVInstance.cpp
View file

@ -33,11 +33,9 @@ KResult KCOVInstance::buffer_allocate(size_t buffer_size_in_entries)
return maybe_vmobject.error();
m_vmobject = maybe_vmobject.release_value();
m_kernel_region = MM.allocate_kernel_region_with_vmobject(
m_kernel_region = TRY(MM.allocate_kernel_region_with_vmobject(
*m_vmobject, m_buffer_size_in_bytes, String::formatted("kcov_{}", m_pid),
Memory::Region::Access::ReadWrite);
if (!m_kernel_region)
return ENOMEM;
Memory::Region::Access::ReadWrite));
m_buffer = (u64*)m_kernel_region->vaddr().as_ptr();
if (!has_buffer())

4
Kernel/Devices/SB16.cpp
View file

@ -263,9 +263,7 @@ KResultOr<size_t> SB16::write(FileDescription&, u64, UserOrKernelBuffer const& d
return ENOMEM;
auto nonnull_page = page.release_nonnull();
auto vmobject = TRY(Memory::AnonymousVMObject::try_create_with_physical_pages({ &nonnull_page, 1 }));
m_dma_region = MM.allocate_kernel_region_with_vmobject(move(vmobject), PAGE_SIZE, "SB16 DMA buffer", Memory::Region::Access::Write);
if (!m_dma_region)
return ENOMEM;
m_dma_region = TRY(MM.allocate_kernel_region_with_vmobject(move(vmobject), PAGE_SIZE, "SB16 DMA buffer", Memory::Region::Access::Write));
}
dbgln_if(SB16_DEBUG, "SB16: Writing buffer of {} bytes", length);

5
Kernel/Graphics/Console/ContiguousFramebufferConsole.cpp
View file

@ -28,8 +28,9 @@ void ContiguousFramebufferConsole::set_resolution(size_t width, size_t height, s
m_pitch = pitch;
dbgln("Framebuffer Console: taking {} bytes", Memory::page_round_up(pitch * height));
m_framebuffer_region = MM.allocate_kernel_region(m_framebuffer_address, Memory::page_round_up(pitch * height), "Framebuffer Console", Memory::Region::Access::ReadWrite, Memory::Region::Cacheable::Yes);
VERIFY(m_framebuffer_region);
auto region_or_error = MM.allocate_kernel_region(m_framebuffer_address, Memory::page_round_up(pitch * height), "Framebuffer Console", Memory::Region::Access::ReadWrite, Memory::Region::Cacheable::Yes);
VERIFY(!region_or_error.is_error());
m_framebuffer_region = region_or_error.release_value();
// Just to start cleanly, we clean the entire framebuffer
memset(m_framebuffer_region->vaddr().as_ptr(), 0, pitch * height);

2
Kernel/Graphics/Console/VGAConsole.cpp
View file

@ -11,7 +11,7 @@ namespace Kernel::Graphics {
UNMAP_AFTER_INIT VGAConsole::VGAConsole(const VGACompatibleAdapter& adapter, Mode mode, size_t width, size_t height)
: Console(width, height)
, m_vga_region(MM.allocate_kernel_region(PhysicalAddress(0xa0000), Memory::page_round_up(0xc0000 - 0xa0000), "VGA Display", Memory::Region::Access::ReadWrite).release_nonnull())
, m_vga_region(MM.allocate_kernel_region(PhysicalAddress(0xa0000), Memory::page_round_up(0xc0000 - 0xa0000), "VGA Display", Memory::Region::Access::ReadWrite).release_value())
, m_adapter(adapter)
, m_mode(mode)
{

18
Kernel/Graphics/FramebufferDevice.cpp
View file

@ -51,13 +51,8 @@ KResultOr<Memory::Region*> FramebufferDevice::mmap(Process& process, FileDescrip
return maybe_swapped_framebuffer_vmobject.error();
m_swapped_framebuffer_vmobject = maybe_swapped_framebuffer_vmobject.release_value();
m_real_framebuffer_region = MM.allocate_kernel_region_with_vmobject(*m_real_framebuffer_vmobject, Memory::page_round_up(framebuffer_size_in_bytes()), "Framebuffer", Memory::Region::Access::ReadWrite);
if (!m_real_framebuffer_region)
return ENOMEM;
m_swapped_framebuffer_region = MM.allocate_kernel_region_with_vmobject(*m_swapped_framebuffer_vmobject, Memory::page_round_up(framebuffer_size_in_bytes()), "Framebuffer Swap (Blank)", Memory::Region::Access::ReadWrite);
if (!m_swapped_framebuffer_region)
return ENOMEM;
m_real_framebuffer_region = TRY(MM.allocate_kernel_region_with_vmobject(*m_real_framebuffer_vmobject, Memory::page_round_up(framebuffer_size_in_bytes()), "Framebuffer", Memory::Region::Access::ReadWrite));
m_swapped_framebuffer_region = TRY(MM.allocate_kernel_region_with_vmobject(*m_swapped_framebuffer_vmobject, Memory::page_round_up(framebuffer_size_in_bytes()), "Framebuffer Swap (Blank)", Memory::Region::Access::ReadWrite));
RefPtr<Memory::VMObject> chosen_vmobject;
if (m_graphical_writes_enabled) {
@ -123,13 +118,8 @@ UNMAP_AFTER_INIT KResult FramebufferDevice::initialize()
return maybe_swapped_framebuffer_vmobject.error();
m_swapped_framebuffer_vmobject = maybe_swapped_framebuffer_vmobject.release_value();
m_real_framebuffer_region = MM.allocate_kernel_region_with_vmobject(*m_real_framebuffer_vmobject, Memory::page_round_up(framebuffer_size_in_bytes()), "Framebuffer", Memory::Region::Access::ReadWrite);
if (!m_real_framebuffer_region)
return ENOMEM;
m_swapped_framebuffer_region = MM.allocate_kernel_region_with_vmobject(*m_swapped_framebuffer_vmobject, Memory::page_round_up(framebuffer_size_in_bytes()), "Framebuffer Swap (Blank)", Memory::Region::Access::ReadWrite);
if (!m_swapped_framebuffer_region)
return ENOMEM;
m_real_framebuffer_region = TRY(MM.allocate_kernel_region_with_vmobject(*m_real_framebuffer_vmobject, Memory::page_round_up(framebuffer_size_in_bytes()), "Framebuffer", Memory::Region::Access::ReadWrite));
m_swapped_framebuffer_region = TRY(MM.allocate_kernel_region_with_vmobject(*m_swapped_framebuffer_vmobject, Memory::page_round_up(framebuffer_size_in_bytes()), "Framebuffer Swap (Blank)", Memory::Region::Access::ReadWrite));
return KSuccess;
}

6
Kernel/Graphics/Intel/NativeGraphicsAdapter.cpp
View file

@ -189,7 +189,11 @@ IntelNativeGraphicsAdapter::IntelNativeGraphicsAdapter(PCI::Address address)
VERIFY(bar0_space_size == 0x80000);
dmesgln("Intel Native Graphics Adapter @ {}, MMIO @ {}, space size is {:x} bytes", address, PhysicalAddress(PCI::get_BAR0(address)), bar0_space_size);
dmesgln("Intel Native Graphics Adapter @ {}, framebuffer @ {}", address, PhysicalAddress(PCI::get_BAR2(address)));
m_registers_region = MM.allocate_kernel_region(PhysicalAddress(PCI::get_BAR0(address)).page_base(), bar0_space_size, "Intel Native Graphics Registers", Memory::Region::Access::ReadWrite);
auto region_or_error = MM.allocate_kernel_region(PhysicalAddress(PCI::get_BAR0(address)).page_base(), bar0_space_size, "Intel Native Graphics Registers", Memory::Region::Access::ReadWrite);
if (region_or_error.is_error()) {
TODO();
}
m_registers_region = region_or_error.release_value();
PCI::enable_bus_mastering(address);
{
SpinlockLocker control_lock(m_control_lock);

7
Kernel/Graphics/VirtIOGPU/FrameBufferDevice.cpp
View file

@ -35,7 +35,7 @@ KResult FrameBufferDevice::create_framebuffer()
// Allocate frame buffer for both front and back
auto& info = display_info();
m_buffer_size = calculate_framebuffer_size(info.rect.width, info.rect.height);
m_framebuffer = MM.allocate_kernel_region(m_buffer_size * 2, String::formatted("VirtGPU FrameBuffer #{}", m_scanout.value()), Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow);
m_framebuffer = TRY(MM.allocate_kernel_region(m_buffer_size * 2, String::formatted("VirtGPU FrameBuffer #{}", m_scanout.value()), Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow));
auto write_sink_page = MM.allocate_user_physical_page(Memory::MemoryManager::ShouldZeroFill::No).release_nonnull();
auto num_needed_pages = m_framebuffer->vmobject().page_count();
@ -43,10 +43,7 @@ KResult FrameBufferDevice::create_framebuffer()
for (auto i = 0u; i < num_needed_pages; ++i) {
pages.append(write_sink_page);
}
auto maybe_framebuffer_sink_vmobject = Memory::AnonymousVMObject::try_create_with_physical_pages(pages.span());
if (maybe_framebuffer_sink_vmobject.is_error())
return maybe_framebuffer_sink_vmobject.error();
m_framebuffer_sink_vmobject = maybe_framebuffer_sink_vmobject.release_value();
m_framebuffer_sink_vmobject = TRY(Memory::AnonymousVMObject::try_create_with_physical_pages(pages.span()));
MutexLocker locker(m_gpu.operation_lock());
m_current_buffer = &buffer_from_index(m_last_set_buffer_index.load());

5
Kernel/Graphics/VirtIOGPU/GPU.cpp
View file

@ -48,8 +48,11 @@ void GPU::initialize()
GPU::GPU(PCI::Address address)
: VirtIO::Device(address)
, m_scratch_space(MM.allocate_contiguous_kernel_region(32 * PAGE_SIZE, "VirtGPU Scratch Space", Memory::Region::Access::ReadWrite))
{
auto region_or_error = MM.allocate_contiguous_kernel_region(32 * PAGE_SIZE, "VirtGPU Scratch Space", Memory::Region::Access::ReadWrite);
if (region_or_error.is_error())
TODO();
m_scratch_space = region_or_error.release_value();
}
GPU::~GPU()

16
Kernel/Heap/kmalloc.cpp
View file

@ -99,16 +99,18 @@ struct KmallocGlobalHeap {
// allocations not including the original allocation_request
// that triggered heap expansion. If we don't allocate
memory_size += 1 * MiB;
region = MM.allocate_kernel_region(memory_size, "kmalloc subheap", Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow);
if (region) {
auto new_region_or_error = MM.allocate_kernel_region(memory_size, "kmalloc subheap", Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow);
if (new_region_or_error.is_error()) {
dbgln("kmalloc: Could not expand heap to satisfy allocation of {} bytes", allocation_request);
return false;
}
region = new_region_or_error.release_value();
dbgln("kmalloc: Adding even more memory to heap at {}, bytes: {}", region->vaddr(), region->size());
m_global_heap.m_heap.add_subheap(region->vaddr().as_ptr(), region->size());
m_global_heap.m_subheap_memory.append(region.release_nonnull());
} else {
dbgln("kmalloc: Could not expand heap to satisfy allocation of {} bytes", allocation_request);
return false;
}
}
return true;
}
@ -173,7 +175,7 @@ struct KmallocGlobalHeap {
{
if (m_backup_memory)
return;
m_backup_memory = MM.allocate_kernel_region(1 * MiB, "kmalloc subheap", Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow);
m_backup_memory = MM.allocate_kernel_region(1 * MiB, "kmalloc subheap", Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow).release_value();
}
size_t backup_memory_bytes() const

16
Kernel/Interrupts/APIC.cpp
View file

@ -251,11 +251,12 @@ UNMAP_AFTER_INIT bool APIC::init_bsp()
set_base(apic_base);
if (!m_is_x2) {
m_apic_base = MM.allocate_kernel_region(apic_base.page_base(), PAGE_SIZE, {}, Memory::Region::Access::ReadWrite);
if (!m_apic_base) {
auto region_or_error = MM.allocate_kernel_region(apic_base.page_base(), PAGE_SIZE, {}, Memory::Region::Access::ReadWrite);
if (region_or_error.is_error()) {
dbgln("APIC: Failed to allocate memory for APIC base");
return false;
}
m_apic_base = region_or_error.release_value();
}
auto rsdp = ACPI::StaticParsing::find_rsdp();
@ -311,13 +312,13 @@ UNMAP_AFTER_INIT static NonnullOwnPtr<Memory::Region> create_identity_mapped_reg
// FIXME: Would be nice to be able to return a KResultOr from here.
VERIFY(!maybe_vmobject.is_error());
auto region = MM.allocate_kernel_region_with_vmobject(
auto region_or_error = MM.allocate_kernel_region_with_vmobject(
Memory::VirtualRange { VirtualAddress { static_cast<FlatPtr>(paddr.get()) }, size },
maybe_vmobject.release_value(),
{},
Memory::Region::Access::ReadWriteExecute);
VERIFY(region);
return region.release_nonnull();
VERIFY(!region_or_error.is_error());
return region_or_error.release_value();
}
UNMAP_AFTER_INIT void APIC::do_boot_aps()
@ -335,11 +336,12 @@ UNMAP_AFTER_INIT void APIC::do_boot_aps()
// Allocate enough stacks for all APs
Vector<OwnPtr<Memory::Region>> apic_ap_stacks;
for (u32 i = 0; i < aps_to_enable; i++) {
auto stack_region = MM.allocate_kernel_region(Thread::default_kernel_stack_size, {}, Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow);
if (!stack_region) {
auto stack_region_or_error = MM.allocate_kernel_region(Thread::default_kernel_stack_size, {}, Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow);
if (stack_region_or_error.is_error()) {
dbgln("APIC: Failed to allocate stack for AP #{}", i);
return;
}
auto stack_region = stack_region_or_error.release_value();
stack_region->set_stack(true);
apic_ap_stacks.append(move(stack_region));
}

20
Kernel/KBuffer.h
View file

@ -29,20 +29,21 @@ class KBufferImpl : public RefCounted<KBufferImpl> {
public:
static RefPtr<KBufferImpl> try_create_with_size(size_t size, Memory::Region::Access access, StringView name = "KBuffer", AllocationStrategy strategy = AllocationStrategy::Reserve)
{
auto region = MM.allocate_kernel_region(Memory::page_round_up(size), name, access, strategy);
if (!region)
auto region_or_error = MM.allocate_kernel_region(Memory::page_round_up(size), name, access, strategy);
if (region_or_error.is_error())
return nullptr;
return adopt_ref_if_nonnull(new (nothrow) KBufferImpl(region.release_nonnull(), size, strategy));
return adopt_ref_if_nonnull(new (nothrow) KBufferImpl(region_or_error.release_value(), size, strategy));
}
static RefPtr<KBufferImpl> try_create_with_bytes(ReadonlyBytes bytes, Memory::Region::Access access, StringView name = "KBuffer", AllocationStrategy strategy = AllocationStrategy::Reserve)
{
auto region = MM.allocate_kernel_region(Memory::page_round_up(bytes.size()), name, access, strategy);
if (!region)
auto region_or_error = MM.allocate_kernel_region(Memory::page_round_up(bytes.size()), name, access, strategy);
if (region_or_error.is_error())
return nullptr;
auto region = region_or_error.release_value();
memcpy(region->vaddr().as_ptr(), bytes.data(), bytes.size());
return adopt_ref_if_nonnull(new (nothrow) KBufferImpl(region.release_nonnull(), bytes.size(), strategy));
return adopt_ref_if_nonnull(new (nothrow) KBufferImpl(move(region), bytes.size(), strategy));
}
static RefPtr<KBufferImpl> create_with_size(size_t size, Memory::Region::Access access, StringView name, AllocationStrategy strategy = AllocationStrategy::Reserve)
@ -61,12 +62,13 @@ public:
[[nodiscard]] bool expand(size_t new_capacity)
{
auto new_region = MM.allocate_kernel_region(Memory::page_round_up(new_capacity), m_region->name(), m_region->access(), m_allocation_strategy);
if (!new_region)
auto new_region_or_error = MM.allocate_kernel_region(Memory::page_round_up(new_capacity), m_region->name(), m_region->access(), m_allocation_strategy);
if (new_region_or_error.is_error())
return false;
auto new_region = new_region_or_error.release_value();
if (m_size > 0)
memcpy(new_region->vaddr().as_ptr(), data(), min(m_region->size(), m_size));
m_region = new_region.release_nonnull();
m_region = move(new_region);
return true;
}

66
Kernel/Memory/MemoryManager.cpp
View file

@ -700,71 +700,46 @@ PageFaultResponse MemoryManager::handle_page_fault(PageFault const& fault)
return region->handle_fault(fault);
}
OwnPtr<Region> MemoryManager::allocate_contiguous_kernel_region(size_t size, StringView name, Region::Access access, Region::Cacheable cacheable)
KResultOr<NonnullOwnPtr<Region>> MemoryManager::allocate_contiguous_kernel_region(size_t size, StringView name, Region::Access access, Region::Cacheable cacheable)
{
VERIFY(!(size % PAGE_SIZE));
SpinlockLocker lock(kernel_page_directory().get_lock());
auto range_or_error = kernel_page_directory().range_allocator().try_allocate_anywhere(size);
if (range_or_error.is_error())
return {};
auto range = range_or_error.release_value();
auto maybe_vmobject = AnonymousVMObject::try_create_physically_contiguous_with_size(size);
if (maybe_vmobject.is_error()) {
kernel_page_directory().range_allocator().deallocate(range);
// FIXME: Would be nice to be able to return a KResultOr from here.
return {};
}
return allocate_kernel_region_with_vmobject(range, maybe_vmobject.release_value(), name, access, cacheable);
auto vmobject = TRY(AnonymousVMObject::try_create_physically_contiguous_with_size(size));
auto range = TRY(kernel_page_directory().range_allocator().try_allocate_anywhere(size));
return allocate_kernel_region_with_vmobject(range, move(vmobject), name, access, cacheable);
}
OwnPtr<Region> MemoryManager::allocate_kernel_region(size_t size, StringView name, Region::Access access, AllocationStrategy strategy, Region::Cacheable cacheable)
KResultOr<NonnullOwnPtr<Region>> MemoryManager::allocate_kernel_region(size_t size, StringView name, Region::Access access, AllocationStrategy strategy, Region::Cacheable cacheable)
{
VERIFY(!(size % PAGE_SIZE));
auto maybe_vm_object = AnonymousVMObject::try_create_with_size(size, strategy);
if (maybe_vm_object.is_error())
return {};
auto vmobject = TRY(AnonymousVMObject::try_create_with_size(size, strategy));
SpinlockLocker lock(kernel_page_directory().get_lock());
auto range_or_error = kernel_page_directory().range_allocator().try_allocate_anywhere(size);
if (range_or_error.is_error())
return {};
auto range = range_or_error.release_value();
return allocate_kernel_region_with_vmobject(range, maybe_vm_object.release_value(), name, access, cacheable);
auto range = TRY(kernel_page_directory().range_allocator().try_allocate_anywhere(size));
return allocate_kernel_region_with_vmobject(range, move(vmobject), name, access, cacheable);
}
OwnPtr<Region> MemoryManager::allocate_kernel_region(PhysicalAddress paddr, size_t size, StringView name, Region::Access access, Region::Cacheable cacheable)
KResultOr<NonnullOwnPtr<Region>> MemoryManager::allocate_kernel_region(PhysicalAddress paddr, size_t size, StringView name, Region::Access access, Region::Cacheable cacheable)
{
auto maybe_vm_object = AnonymousVMObject::try_create_for_physical_range(paddr, size);
if (maybe_vm_object.is_error())
return {};
VERIFY(!(size % PAGE_SIZE));
auto vmobject = TRY(AnonymousVMObject::try_create_for_physical_range(paddr, size));
SpinlockLocker lock(kernel_page_directory().get_lock());
auto range_or_error = kernel_page_directory().range_allocator().try_allocate_anywhere(size);
if (range_or_error.is_error())
return {};
auto range = range_or_error.release_value();
return allocate_kernel_region_with_vmobject(range, maybe_vm_object.release_value(), name, access, cacheable);
auto range = TRY(kernel_page_directory().range_allocator().try_allocate_anywhere(size));
return allocate_kernel_region_with_vmobject(range, move(vmobject), name, access, cacheable);
}
OwnPtr<Region> MemoryManager::allocate_kernel_region_with_vmobject(VirtualRange const& range, VMObject& vmobject, StringView name, Region::Access access, Region::Cacheable cacheable)
KResultOr<NonnullOwnPtr<Region>> MemoryManager::allocate_kernel_region_with_vmobject(VirtualRange const& range, VMObject& vmobject, StringView name, Region::Access access, Region::Cacheable cacheable)
{
auto maybe_region = Region::try_create_kernel_only(range, vmobject, 0, KString::try_create(name), access, cacheable);
if (maybe_region.is_error())
return {};
auto region = maybe_region.release_value();
auto region = TRY(Region::try_create_kernel_only(range, vmobject, 0, KString::try_create(name), access, cacheable));
if (!region->map(kernel_page_directory()))
return {};
return ENOMEM;
return region;
}
OwnPtr<Region> MemoryManager::allocate_kernel_region_with_vmobject(VMObject& vmobject, size_t size, StringView name, Region::Access access, Region::Cacheable cacheable)
KResultOr<NonnullOwnPtr<Region>> MemoryManager::allocate_kernel_region_with_vmobject(VMObject& vmobject, size_t size, StringView name, Region::Access access, Region::Cacheable cacheable)
{
VERIFY(!(size % PAGE_SIZE));
SpinlockLocker lock(kernel_page_directory().get_lock());
auto range_or_error = kernel_page_directory().range_allocator().try_allocate_anywhere(size);
if (range_or_error.is_error())
return {};
auto range = range_or_error.release_value();
auto range = TRY(kernel_page_directory().range_allocator().try_allocate_anywhere(size));
return allocate_kernel_region_with_vmobject(range, vmobject, name, access, cacheable);
}
@ -909,8 +884,13 @@ NonnullRefPtrVector<PhysicalPage> MemoryManager::allocate_contiguous_supervisor_
return {};
}
auto cleanup_region = MM.allocate_kernel_region(physical_pages[0].paddr(), PAGE_SIZE * count, "MemoryManager Allocation Sanitization", Region::Access::Read | Region::Access::Write);
{
auto region_or_error = MM.allocate_kernel_region(physical_pages[0].paddr(), PAGE_SIZE * count, "MemoryManager Allocation Sanitization", Region::Access::Read | Region::Access::Write);
if (region_or_error.is_error())
TODO();
auto cleanup_region = region_or_error.release_value();
fast_u32_fill((u32*)cleanup_region->vaddr().as_ptr(), 0, (PAGE_SIZE * count) / sizeof(u32));
}
m_system_memory_info.super_physical_pages_used += count;
return physical_pages;
}

10
Kernel/Memory/MemoryManager.h
View file

@ -180,11 +180,11 @@ public:
NonnullRefPtrVector<PhysicalPage> allocate_contiguous_supervisor_physical_pages(size_t size);
void deallocate_physical_page(PhysicalAddress);
OwnPtr<Region> allocate_contiguous_kernel_region(size_t, StringView name, Region::Access access, Region::Cacheable = Region::Cacheable::Yes);
OwnPtr<Region> allocate_kernel_region(size_t, StringView name, Region::Access access, AllocationStrategy strategy = AllocationStrategy::Reserve, Region::Cacheable = Region::Cacheable::Yes);
OwnPtr<Region> allocate_kernel_region(PhysicalAddress, size_t, StringView name, Region::Access access, Region::Cacheable = Region::Cacheable::Yes);
OwnPtr<Region> allocate_kernel_region_with_vmobject(VMObject&, size_t, StringView name, Region::Access access, Region::Cacheable = Region::Cacheable::Yes);
OwnPtr<Region> allocate_kernel_region_with_vmobject(VirtualRange const&, VMObject&, StringView name, Region::Access access, Region::Cacheable = Region::Cacheable::Yes);
KResultOr<NonnullOwnPtr<Region>> allocate_contiguous_kernel_region(size_t, StringView name, Region::Access access, Region::Cacheable = Region::Cacheable::Yes);
KResultOr<NonnullOwnPtr<Region>> allocate_kernel_region(size_t, StringView name, Region::Access access, AllocationStrategy strategy = AllocationStrategy::Reserve, Region::Cacheable = Region::Cacheable::Yes);
KResultOr<NonnullOwnPtr<Region>> allocate_kernel_region(PhysicalAddress, size_t, StringView name, Region::Access access, Region::Cacheable = Region::Cacheable::Yes);
KResultOr<NonnullOwnPtr<Region>> allocate_kernel_region_with_vmobject(VMObject&, size_t, StringView name, Region::Access access, Region::Cacheable = Region::Cacheable::Yes);
KResultOr<NonnullOwnPtr<Region>> allocate_kernel_region_with_vmobject(VirtualRange const&, VMObject&, StringView name, Region::Access access, Region::Cacheable = Region::Cacheable::Yes);
struct SystemMemoryInfo {
PhysicalSize user_physical_pages { 0 };

2
Kernel/Memory/RingBuffer.cpp
View file

@ -11,7 +11,7 @@
namespace Kernel::Memory {
RingBuffer::RingBuffer(String region_name, size_t capacity)
: m_region(MM.allocate_contiguous_kernel_region(page_round_up(capacity), move(region_name), Region::Access::Read | Region::Access::Write))
: m_region(MM.allocate_contiguous_kernel_region(page_round_up(capacity), move(region_name), Region::Access::Read | Region::Access::Write).release_value())
, m_capacity_in_bytes(capacity)
{
}

5
Kernel/Memory/ScatterGatherList.cpp
View file

@ -21,7 +21,10 @@ RefPtr<ScatterGatherList> ScatterGatherList::try_create(AsyncBlockDeviceRequest&
ScatterGatherList::ScatterGatherList(NonnullRefPtr<AnonymousVMObject> vm_object, AsyncBlockDeviceRequest& request, size_t device_block_size)
: m_vm_object(move(vm_object))
{
m_dma_region = MM.allocate_kernel_region_with_vmobject(m_vm_object, page_round_up((request.block_count() * device_block_size)), "AHCI Scattered DMA", Region::Access::Read | Region::Access::Write, Region::Cacheable::Yes);
auto region_or_error = MM.allocate_kernel_region_with_vmobject(m_vm_object, page_round_up((request.block_count() * device_block_size)), "AHCI Scattered DMA", Region::Access::Read | Region::Access::Write, Region::Cacheable::Yes);
if (region_or_error.is_error())
TODO();
m_dma_region = region_or_error.release_value();
}
}

5
Kernel/Memory/TypedMapping.h
View file

@ -28,7 +28,10 @@ static TypedMapping<T> map_typed(PhysicalAddress paddr, size_t length, Region::A
{
TypedMapping<T> table;
size_t mapping_length = page_round_up(paddr.offset_in_page() + length);
table.region = MM.allocate_kernel_region(paddr.page_base(), mapping_length, {}, access);
auto region_or_error = MM.allocate_kernel_region(paddr.page_base(), mapping_length, {}, access);
if (region_or_error.is_error())
TODO();
table.region = region_or_error.release_value();
table.offset = paddr.offset_in_page();
return table;
}

5
Kernel/Net/E1000ENetworkAdapter.cpp
View file

@ -204,9 +204,10 @@ UNMAP_AFTER_INIT bool E1000ENetworkAdapter::initialize()
enable_bus_mastering(pci_address());
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), "E1000e 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), "E1000e 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());

13
Kernel/Net/E1000NetworkAdapter.cpp
View file

@ -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];

5
Kernel/Net/NetworkTask.cpp
View file

@ -88,7 +88,10 @@ void NetworkTask_main(void*)
};
size_t buffer_size = 64 * KiB;
auto buffer_region = MM.allocate_kernel_region(buffer_size, "Kernel Packet Buffer", Memory::Region::Access::ReadWrite);
auto region_or_error = MM.allocate_kernel_region(buffer_size, "Kernel Packet Buffer", Memory::Region::Access::ReadWrite);
if (region_or_error.is_error())
TODO();
auto buffer_region = region_or_error.release_value();
auto buffer = (u8*)buffer_region->vaddr().get();
Time packet_timestamp;

6
Kernel/Net/RTL8139NetworkAdapter.cpp
View file

@ -125,8 +125,8 @@ UNMAP_AFTER_INIT RTL8139NetworkAdapter::RTL8139NetworkAdapter(PCI::Address addre
: PCI::Device(address)
, IRQHandler(irq)
, m_io_base(PCI::get_BAR0(pci_address()) & ~1)
, m_rx_buffer(MM.allocate_contiguous_kernel_region(Memory::page_round_up(RX_BUFFER_SIZE + PACKET_SIZE_MAX), "RTL8139 RX", Memory::Region::Access::ReadWrite))
, m_packet_buffer(MM.allocate_contiguous_kernel_region(Memory::page_round_up(PACKET_SIZE_MAX), "RTL8139 Packet buffer", Memory::Region::Access::ReadWrite))
, m_rx_buffer(MM.allocate_contiguous_kernel_region(Memory::page_round_up(RX_BUFFER_SIZE + PACKET_SIZE_MAX), "RTL8139 RX", Memory::Region::Access::ReadWrite).release_value())
, m_packet_buffer(MM.allocate_contiguous_kernel_region(Memory::page_round_up(PACKET_SIZE_MAX), "RTL8139 Packet buffer", Memory::Region::Access::ReadWrite).release_value())
{
m_tx_buffers.ensure_capacity(RTL8139_TX_BUFFER_COUNT);
set_interface_name(address);
@ -145,7 +145,7 @@ UNMAP_AFTER_INIT RTL8139NetworkAdapter::RTL8139NetworkAdapter(PCI::Address addre
dbgln("RTL8139: RX buffer: {}", m_rx_buffer->physical_page(0)->paddr());
for (int i = 0; i < RTL8139_TX_BUFFER_COUNT; i++) {
m_tx_buffers.append(MM.allocate_contiguous_kernel_region(Memory::page_round_up(TX_BUFFER_SIZE), "RTL8139 TX", Memory::Region::Access::Write | Memory::Region::Access::Read));
m_tx_buffers.append(MM.allocate_contiguous_kernel_region(Memory::page_round_up(TX_BUFFER_SIZE), "RTL8139 TX", Memory::Region::Access::Write | Memory::Region::Access::Read).release_value());
dbgln("RTL8139: TX buffer {}: {}", i, m_tx_buffers[i]->physical_page(0)->paddr());
}

14
Kernel/Net/RTL8168NetworkAdapter.cpp
View file

@ -195,8 +195,8 @@ UNMAP_AFTER_INIT RTL8168NetworkAdapter::RTL8168NetworkAdapter(PCI::Address addre
: PCI::Device(address)
, IRQHandler(irq)
, m_io_base(PCI::get_BAR0(pci_address()) & ~1)
, m_rx_descriptors_region(MM.allocate_contiguous_kernel_region(Memory::page_round_up(sizeof(TXDescriptor) * (number_of_rx_descriptors + 1)), "RTL8168 RX", Memory::Region::Access::ReadWrite))
, m_tx_descriptors_region(MM.allocate_contiguous_kernel_region(Memory::page_round_up(sizeof(RXDescriptor) * (number_of_tx_descriptors + 1)), "RTL8168 TX", Memory::Region::Access::ReadWrite))
, m_rx_descriptors_region(MM.allocate_contiguous_kernel_region(Memory::page_round_up(sizeof(TXDescriptor) * (number_of_rx_descriptors + 1)), "RTL8168 RX", Memory::Region::Access::ReadWrite).release_value())
, m_tx_descriptors_region(MM.allocate_contiguous_kernel_region(Memory::page_round_up(sizeof(RXDescriptor) * (number_of_tx_descriptors + 1)), "RTL8168 TX", Memory::Region::Access::ReadWrite).release_value())
{
set_interface_name(address);
@ -1043,10 +1043,9 @@ UNMAP_AFTER_INIT void RTL8168NetworkAdapter::initialize_rx_descriptors()
auto* rx_descriptors = (RXDescriptor*)m_rx_descriptors_region->vaddr().as_ptr();
for (size_t i = 0; i < number_of_rx_descriptors; ++i) {
auto& descriptor = rx_descriptors[i];
auto region = MM.allocate_contiguous_kernel_region(Memory::page_round_up(RX_BUFFER_SIZE), "RTL8168 RX buffer", Memory::Region::Access::ReadWrite);
VERIFY(region);
auto region = MM.allocate_contiguous_kernel_region(Memory::page_round_up(RX_BUFFER_SIZE), "RTL8168 RX buffer", Memory::Region::Access::ReadWrite).release_value();
memset(region->vaddr().as_ptr(), 0, region->size()); // MM already zeros out newly allocated pages, but we do it again in case that ever changes
m_rx_buffers_regions.append(region.release_nonnull());
m_rx_buffers_regions.append(move(region));
descriptor.buffer_size = RX_BUFFER_SIZE;
descriptor.flags = RXDescriptor::Ownership; // let the NIC know it can use this descriptor
@ -1062,10 +1061,9 @@ UNMAP_AFTER_INIT void RTL8168NetworkAdapter::initialize_tx_descriptors()
auto* tx_descriptors = (TXDescriptor*)m_tx_descriptors_region->vaddr().as_ptr();
for (size_t i = 0; i < number_of_tx_descriptors; ++i) {
auto& descriptor = tx_descriptors[i];
auto region = MM.allocate_contiguous_kernel_region(Memory::page_round_up(TX_BUFFER_SIZE), "RTL8168 TX buffer", Memory::Region::Access::ReadWrite);
VERIFY(region);
auto region = MM.allocate_contiguous_kernel_region(Memory::page_round_up(TX_BUFFER_SIZE), "RTL8168 TX buffer", Memory::Region::Access::ReadWrite).release_value();
memset(region->vaddr().as_ptr(), 0, region->size()); // MM already zeros out newly allocated pages, but we do it again in case that ever changes
m_tx_buffers_regions.append(region.release_nonnull());
m_tx_buffers_regions.append(move(region));
descriptor.flags = TXDescriptor::FirstSegment | TXDescriptor::LastSegment;
auto physical_address = m_tx_buffers_regions[i].physical_page(0)->paddr().get();

2
Kernel/Process.cpp
View file

@ -363,7 +363,7 @@ extern "C" char const asm_signal_trampoline_end[];
void create_signal_trampoline()
{
// NOTE: We leak this region.
g_signal_trampoline_region = MM.allocate_kernel_region(PAGE_SIZE, "Signal trampolines", Memory::Region::Access::ReadWrite).leak_ptr();
g_signal_trampoline_region = MM.allocate_kernel_region(PAGE_SIZE, "Signal trampolines", Memory::Region::Access::ReadWrite).release_value().leak_ptr();
g_signal_trampoline_region->set_syscall_region(true);
size_t trampoline_size = asm_signal_trampoline_end - asm_signal_trampoline;

3
Kernel/Storage/AHCIController.cpp
View file

@ -126,8 +126,7 @@ AHCI::HBADefinedCapabilities AHCIController::capabilities() const
NonnullOwnPtr<Memory::Region> AHCIController::default_hba_region() const
{
auto region = MM.allocate_kernel_region(PhysicalAddress(PCI::get_BAR5(pci_address())).page_base(), Memory::page_round_up(sizeof(AHCI::HBA)), "AHCI HBA", Memory::Region::Access::ReadWrite);
return region.release_nonnull();
return MM.allocate_kernel_region(PhysicalAddress(PCI::get_BAR5(pci_address())).page_base(), Memory::page_round_up(sizeof(AHCI::HBA)), "AHCI HBA", Memory::Region::Access::ReadWrite).release_value();
}
AHCIController::~AHCIController()

12
Kernel/Storage/AHCIPort.cpp
View file

@ -50,7 +50,11 @@ AHCIPort::AHCIPort(const AHCIPortHandler& handler, volatile AHCI::PortRegisters&
for (size_t index = 0; index < 1; index++) {
m_command_table_pages.append(MM.allocate_supervisor_physical_page().release_nonnull());
}
m_command_list_region = MM.allocate_kernel_region(m_command_list_page->paddr(), PAGE_SIZE, "AHCI Port Command List", Memory::Region::Access::ReadWrite, Memory::Region::Cacheable::No);
auto region_or_error = MM.allocate_kernel_region(m_command_list_page->paddr(), PAGE_SIZE, "AHCI Port Command List", Memory::Region::Access::ReadWrite, Memory::Region::Cacheable::No);
if (region_or_error.is_error())
TODO();
m_command_list_region = region_or_error.release_value();
dbgln_if(AHCI_DEBUG, "AHCI Port {}: Command list region at {}", representative_port_index(), m_command_list_region->vaddr());
}
@ -159,7 +163,7 @@ void AHCIPort::eject()
// handshake error bit in PxSERR register if CFL is incorrect.
command_list_entries[unused_command_header.value()].attributes = (size_t)FIS::DwordCount::RegisterHostToDevice | AHCI::CommandHeaderAttributes::P | AHCI::CommandHeaderAttributes::C | AHCI::CommandHeaderAttributes::A;
auto command_table_region = MM.allocate_kernel_region(m_command_table_pages[unused_command_header.value()].paddr().page_base(), Memory::page_round_up(sizeof(AHCI::CommandTable)), "AHCI Command Table", Memory::Region::Access::ReadWrite, Memory::Region::Cacheable::No);
auto command_table_region = MM.allocate_kernel_region(m_command_table_pages[unused_command_header.value()].paddr().page_base(), Memory::page_round_up(sizeof(AHCI::CommandTable)), "AHCI Command Table", Memory::Region::Access::ReadWrite, Memory::Region::Cacheable::No).release_value();
auto& command_table = *(volatile AHCI::CommandTable*)command_table_region->vaddr().as_ptr();
memset(const_cast<u8*>(command_table.command_fis), 0, 64);
auto& fis = *(volatile FIS::HostToDevice::Register*)command_table.command_fis;
@ -526,7 +530,7 @@ bool AHCIPort::access_device(AsyncBlockDeviceRequest::RequestType direction, u64
dbgln_if(AHCI_DEBUG, "AHCI Port {}: CLE: ctba={:#08x}, ctbau={:#08x}, prdbc={:#08x}, prdtl={:#04x}, attributes={:#04x}", representative_port_index(), (u32)command_list_entries[unused_command_header.value()].ctba, (u32)command_list_entries[unused_command_header.value()].ctbau, (u32)command_list_entries[unused_command_header.value()].prdbc, (u16)command_list_entries[unused_command_header.value()].prdtl, (u16)command_list_entries[unused_command_header.value()].attributes);
auto command_table_region = MM.allocate_kernel_region(m_command_table_pages[unused_command_header.value()].paddr().page_base(), Memory::page_round_up(sizeof(AHCI::CommandTable)), "AHCI Command Table", Memory::Region::Access::ReadWrite, Memory::Region::Cacheable::No);
auto command_table_region = MM.allocate_kernel_region(m_command_table_pages[unused_command_header.value()].paddr().page_base(), Memory::page_round_up(sizeof(AHCI::CommandTable)), "AHCI Command Table", Memory::Region::Access::ReadWrite, Memory::Region::Cacheable::No).release_value();
auto& command_table = *(volatile AHCI::CommandTable*)command_table_region->vaddr().as_ptr();
dbgln_if(AHCI_DEBUG, "AHCI Port {}: Allocated command table at {}", representative_port_index(), command_table_region->vaddr());
@ -610,7 +614,7 @@ bool AHCIPort::identify_device(SpinlockLocker<Spinlock>& main_lock)
// QEMU doesn't care if we don't set the correct CFL field in this register, real hardware will set an handshake error bit in PxSERR register.
command_list_entries[unused_command_header.value()].attributes = (size_t)FIS::DwordCount::RegisterHostToDevice | AHCI::CommandHeaderAttributes::P;
auto command_table_region = MM.allocate_kernel_region(m_command_table_pages[unused_command_header.value()].paddr().page_base(), Memory::page_round_up(sizeof(AHCI::CommandTable)), "AHCI Command Table", Memory::Region::Access::ReadWrite);
auto command_table_region = MM.allocate_kernel_region(m_command_table_pages[unused_command_header.value()].paddr().page_base(), Memory::page_round_up(sizeof(AHCI::CommandTable)), "AHCI Command Table", Memory::Region::Access::ReadWrite).release_value();
auto& command_table = *(volatile AHCI::CommandTable*)command_table_region->vaddr().as_ptr();
memset(const_cast<u8*>(command_table.command_fis), 0, 64);
command_table.descriptors[0].base_high = 0;

15
Kernel/Storage/BMIDEChannel.cpp
View file

@ -43,8 +43,19 @@ UNMAP_AFTER_INIT void BMIDEChannel::initialize()
m_dma_buffer_page = MM.allocate_supervisor_physical_page();
if (m_dma_buffer_page.is_null() || m_prdt_page.is_null())
return;
m_prdt_region = MM.allocate_kernel_region(m_prdt_page->paddr(), PAGE_SIZE, "IDE PRDT", Memory::Region::Access::ReadWrite);
m_dma_buffer_region = MM.allocate_kernel_region(m_dma_buffer_page->paddr(), PAGE_SIZE, "IDE DMA region", Memory::Region::Access::ReadWrite);
{
auto region_or_error = MM.allocate_kernel_region(m_prdt_page->paddr(), PAGE_SIZE, "IDE PRDT", Memory::Region::Access::ReadWrite);
if (region_or_error.is_error())
TODO();
m_prdt_region = region_or_error.release_value();
}
{
auto region_or_error = MM.allocate_kernel_region(m_dma_buffer_page->paddr(), PAGE_SIZE, "IDE DMA region", Memory::Region::Access::ReadWrite);
if (region_or_error.is_error())
TODO();
m_dma_buffer_region = region_or_error.release_value();
}
prdt().end_of_table = 0x8000;
// clear bus master interrupt status

9
Kernel/Storage/RamdiskController.cpp
View file

@ -49,11 +49,12 @@ RamdiskController::RamdiskController()
for (auto& used_memory_range : MM.used_memory_ranges()) {
if (used_memory_range.type == Memory::UsedMemoryRangeType::BootModule) {
size_t length = Memory::page_round_up(used_memory_range.end.get()) - used_memory_range.start.get();
auto region = MM.allocate_kernel_region(used_memory_range.start, length, "Ramdisk", Memory::Region::Access::ReadWrite);
if (!region)
auto region_or_error = MM.allocate_kernel_region(used_memory_range.start, length, "Ramdisk", Memory::Region::Access::ReadWrite);
if (region_or_error.is_error()) {
dmesgln("RamdiskController: Failed to allocate kernel region of size {}", length);
else
m_devices.append(RamdiskDevice::create(*this, region.release_nonnull(), 6, count));
} else {
m_devices.append(RamdiskDevice::create(*this, region_or_error.release_value(), 6, count));
}
count++;
}
}

14
Kernel/Syscalls/execve.cpp
View file

@ -173,12 +173,7 @@ static KResultOr<RequiredLoadRange> get_required_load_range(FileDescription& pro
size_t executable_size = inode.size();
auto region = MM.allocate_kernel_region_with_vmobject(*vmobject, Memory::page_round_up(executable_size), "ELF memory range calculation", Memory::Region::Access::Read);
if (!region) {
dbgln("Could not allocate memory for ELF");
return ENOMEM;
}
auto region = TRY(MM.allocate_kernel_region_with_vmobject(*vmobject, Memory::page_round_up(executable_size), "ELF memory range calculation", Memory::Region::Access::Read));
auto elf_image = ELF::Image(region->vaddr().as_ptr(), executable_size);
if (!elf_image.is_valid()) {
return EINVAL;
@ -283,12 +278,7 @@ static KResultOr<LoadResult> load_elf_object(NonnullOwnPtr<Memory::AddressSpace>
size_t executable_size = inode.size();
auto executable_region = MM.allocate_kernel_region_with_vmobject(*vmobject, Memory::page_round_up(executable_size), "ELF loading", Memory::Region::Access::Read);
if (!executable_region) {
dbgln("Could not allocate memory for ELF loading");
return ENOMEM;
}
auto executable_region = TRY(MM.allocate_kernel_region_with_vmobject(*vmobject, Memory::page_round_up(executable_size), "ELF loading", Memory::Region::Access::Read));
auto elf_image = ELF::Image(executable_region->vaddr().as_ptr(), executable_size);
if (!elf_image.is_valid())

4
Kernel/TTY/VirtualConsole.cpp
View file

@ -120,7 +120,7 @@ UNMAP_AFTER_INIT void VirtualConsole::initialize()
// Allocate twice of the max row * max column * sizeof(Cell) to ensure we can have some sort of history mechanism...
auto size = GraphicsManagement::the().console()->max_column() * GraphicsManagement::the().console()->max_row() * sizeof(Cell) * 2;
m_cells = MM.allocate_kernel_region(Memory::page_round_up(size), "Virtual Console Cells", Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow);
m_cells = MM.allocate_kernel_region(Memory::page_round_up(size), "Virtual Console Cells", Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow).release_value();
// Add the lines, so we also ensure they will be flushed now
for (size_t row = 0; row < rows(); row++) {
@ -139,7 +139,7 @@ void VirtualConsole::refresh_after_resolution_change()
// Note: From now on, columns() and rows() are updated with the new settings.
auto size = GraphicsManagement::the().console()->max_column() * GraphicsManagement::the().console()->max_row() * sizeof(Cell) * 2;
auto new_cells = MM.allocate_kernel_region(Memory::page_round_up(size), "Virtual Console Cells", Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow);
auto new_cells = MM.allocate_kernel_region(Memory::page_round_up(size), "Virtual Console Cells", Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow).release_value();
if (rows() < old_rows_count) {
m_lines.shrink(rows());

6
Kernel/Thread.cpp
View file

@ -39,9 +39,7 @@ SpinlockProtected<Thread::GlobalList>& Thread::all_instances()
KResultOr<NonnullRefPtr<Thread>> Thread::try_create(NonnullRefPtr<Process> process)
{
auto kernel_stack_region = MM.allocate_kernel_region(default_kernel_stack_size, {}, Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow);
if (!kernel_stack_region)
return ENOMEM;
auto kernel_stack_region = TRY(MM.allocate_kernel_region(default_kernel_stack_size, {}, Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow));
kernel_stack_region->set_stack(true);
auto block_timer = try_make_ref_counted<Timer>();
@ -50,7 +48,7 @@ KResultOr<NonnullRefPtr<Thread>> Thread::try_create(NonnullRefPtr<Process> proce
auto name = KString::try_create(process->name());
return adopt_nonnull_ref_or_enomem(new (nothrow) Thread(move(process), kernel_stack_region.release_nonnull(), block_timer.release_nonnull(), move(name)));
return adopt_nonnull_ref_or_enomem(new (nothrow) Thread(move(process), move(kernel_stack_region), block_timer.release_nonnull(), move(name)));
}
Thread::Thread(NonnullRefPtr<Process> process, NonnullOwnPtr<Memory::Region> kernel_stack_region, NonnullRefPtr<Timer> block_timer, OwnPtr<KString> name)

2
Kernel/Time/HPET.cpp
View file

@ -413,7 +413,7 @@ u64 HPET::ns_to_raw_counter_ticks(u64 ns) const
UNMAP_AFTER_INIT HPET::HPET(PhysicalAddress acpi_hpet)
: m_physical_acpi_hpet_table(acpi_hpet)
, m_physical_acpi_hpet_registers(find_acpi_hpet_registers_block())
, m_hpet_mmio_region(MM.allocate_kernel_region(m_physical_acpi_hpet_registers.page_base(), PAGE_SIZE, "HPET MMIO", Memory::Region::Access::ReadWrite))
, m_hpet_mmio_region(MM.allocate_kernel_region(m_physical_acpi_hpet_registers.page_base(), PAGE_SIZE, "HPET MMIO", Memory::Region::Access::ReadWrite).release_value())
{
s_hpet = this; // Make available as soon as possible so that IRQs can use it

3
Kernel/Time/TimeManagement.cpp
View file

@ -146,8 +146,7 @@ UNMAP_AFTER_INIT void TimeManagement::initialize(u32 cpu)
s_the->set_system_timer(*apic_timer);
}
s_the->m_time_page_region = MM.allocate_kernel_region(PAGE_SIZE, "Time page"sv, Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow);
VERIFY(s_the->m_time_page_region);
s_the->m_time_page_region = MM.allocate_kernel_region(PAGE_SIZE, "Time page"sv, Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow).release_value();
} else {
VERIFY(s_the.is_initialized());
if (auto* apic_timer = APIC::the().get_timer()) {