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Kernel: Use DMA helper everywhere

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Port UCHI, AC97, SB16, BMIDEChannel and AHCIPort to use the helper to
allocate DMA buffers.
This commit is contained in:
Pankaj Raghav 2022-01-06 22:01:05 +05:30 committed by Andreas Kling
parent 59da9bd0bd
commit 0a1b34c753
Notes: sideshowbarker 2024-07-17 21:23:07 +09:00 
Author: https://github.com/Panky-codes
Commit: https://github.com/SerenityOS/serenity/commit/0a1b34c753e
Pull-request: https://github.com/SerenityOS/serenity/pull/11687
Reviewed-by: https://github.com/Quaker762
Reviewed-by: https://github.com/alimpfard
5 changed files with 13 additions and 33 deletions
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8
Kernel/Bus/USB/UHCI/UHCIController.cpp
View file

@ -107,9 +107,7 @@ ErrorOr<void> 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 = TRY(MM.allocate_kernel_region_with_vmobject(move(vmobject), PAGE_SIZE, "UHCI Framelist", Memory::Region::Access::Write));
m_framelist = TRY(MM.allocate_dma_buffer_page("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
@ -141,11 +139,9 @@ UNMAP_AFTER_INIT ErrorOr<void> UHCIController::create_structures()
m_dummy_qh = allocate_queue_head();
// Now the Transfer Descriptor pool
auto td_pool_vmobject = TRY(Memory::AnonymousVMObject::try_create_physically_contiguous_with_size(PAGE_SIZE));
m_transfer_descriptor_pool = TRY(UHCIDescriptorPool<TransferDescriptor>::try_create("Transfer Descriptor Pool"sv));
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));
m_isochronous_transfer_pool = TRY(MM.allocate_dma_buffer_page("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);

11
Kernel/Devices/Audio/AC97.cpp
View file

@ -20,13 +20,6 @@ static constexpr u16 pcm_fixed_sample_rate = 48000;
static constexpr u16 pcm_sample_rate_minimum = 8000;
static constexpr u16 pcm_sample_rate_maximum = 48000;
static ErrorOr<OwnPtr<Memory::Region>> allocate_physical_buffer(size_t size, StringView name)
{
auto rounded_size = TRY(Memory::page_round_up(size));
auto vmobject = TRY(Memory::AnonymousVMObject::try_create_physically_contiguous_with_size(rounded_size));
return TRY(MM.allocate_kernel_region_with_vmobject(move(vmobject), vmobject->size(), name, Memory::Region::Access::Write));
}
UNMAP_AFTER_INIT void AC97::detect()
{
PCI::enumerate([&](PCI::DeviceIdentifier const& device_identifier) {
@ -204,11 +197,11 @@ void AC97::set_pcm_output_volume(u8 left_channel, u8 right_channel, Muted mute)
ErrorOr<size_t> AC97::write(OpenFileDescription&, u64, UserOrKernelBuffer const& data, size_t length)
{
if (!m_output_buffer) {
m_output_buffer = TRY(allocate_physical_buffer(m_output_buffer_page_count * PAGE_SIZE, "AC97 Output buffer"sv));
m_output_buffer = TRY(MM.allocate_dma_buffer_pages(m_output_buffer_page_count * PAGE_SIZE, "AC97 Output buffer"sv, Memory::Region::Access::Write));
}
if (!m_buffer_descriptor_list) {
constexpr size_t buffer_descriptor_list_size = buffer_descriptor_list_max_entries * sizeof(BufferDescriptorListEntry);
m_buffer_descriptor_list = TRY(allocate_physical_buffer(buffer_descriptor_list_size, "AC97 Buffer Descriptor List"sv));
m_buffer_descriptor_list = TRY(MM.allocate_dma_buffer_pages(buffer_descriptor_list_size, "AC97 Buffer Descriptor List"sv, Memory::Region::Access::Write));
}
auto remaining = length;

7
Kernel/Devices/Audio/SB16.cpp
View file

@ -252,12 +252,7 @@ void SB16::wait_for_irq()
ErrorOr<size_t> SB16::write(OpenFileDescription&, u64, UserOrKernelBuffer const& data, size_t length)
{
if (!m_dma_region) {
auto page = MM.allocate_supervisor_physical_page();
if (!page)
return ENOMEM;
auto nonnull_page = page.release_nonnull();
auto vmobject = TRY(Memory::AnonymousVMObject::try_create_with_physical_pages({ &nonnull_page, 1 }));
m_dma_region = TRY(MM.allocate_kernel_region_with_vmobject(move(vmobject), PAGE_SIZE, "SB16 DMA buffer", Memory::Region::Access::Write));
m_dma_region = TRY(MM.allocate_dma_buffer_page("SB16 DMA buffer", Memory::Region::Access::Write));
}
dbgln_if(SB16_DEBUG, "SB16: Writing buffer of {} bytes", length);

12
Kernel/Storage/ATA/AHCIPort.cpp
View file

@ -37,14 +37,10 @@ AHCIPort::AHCIPort(const AHCIPortHandler& handler, volatile AHCI::PortRegisters&
return;
}
m_command_list_page = MM.allocate_supervisor_physical_page();
m_fis_receive_page = MM.allocate_supervisor_physical_page();
if (m_command_list_page.is_null() || m_fis_receive_page.is_null())
if (m_fis_receive_page.is_null())
return;
dbgln_if(AHCI_DEBUG, "AHCI Port {}: Command list page at {}", representative_port_index(), m_command_list_page->paddr());
dbgln_if(AHCI_DEBUG, "AHCI Port {}: FIS receive page at {}", representative_port_index(), m_command_list_page->paddr());
for (size_t index = 0; index < 1; index++) {
m_dma_buffers.append(MM.allocate_supervisor_physical_page().release_nonnull());
}
@ -52,7 +48,11 @@ AHCIPort::AHCIPort(const AHCIPortHandler& handler, volatile AHCI::PortRegisters&
m_command_table_pages.append(MM.allocate_supervisor_physical_page().release_nonnull());
}
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);
auto region_or_error = MM.allocate_dma_buffer_page("AHCI Port Command List", Memory::Region::Access::ReadWrite, m_command_list_page);
dbgln_if(AHCI_DEBUG, "AHCI Port {}: Command list page at {}", representative_port_index(), m_command_list_page->paddr());
dbgln_if(AHCI_DEBUG, "AHCI Port {}: FIS receive page at {}", representative_port_index(), m_fis_receive_page->paddr());
if (region_or_error.is_error())
TODO();
m_command_list_region = region_or_error.release_value();

8
Kernel/Storage/ATA/BMIDEChannel.cpp
View file

@ -40,18 +40,14 @@ UNMAP_AFTER_INIT void BMIDEChannel::initialize()
VERIFY(m_io_group.bus_master_base().has_value());
// Let's try to set up DMA transfers.
PCI::enable_bus_mastering(m_parent_controller->pci_address());
m_prdt_page = MM.allocate_supervisor_physical_page();
m_dma_buffer_page = MM.allocate_supervisor_physical_page();
if (m_dma_buffer_page.is_null() || m_prdt_page.is_null())
return;
{
auto region_or_error = MM.allocate_kernel_region(m_prdt_page->paddr(), PAGE_SIZE, "IDE PRDT", Memory::Region::Access::ReadWrite);
auto region_or_error = MM.allocate_dma_buffer_page("IDE PRDT", Memory::Region::Access::ReadWrite, m_prdt_page);
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);
auto region_or_error = MM.allocate_dma_buffer_page("IDE DMA region", Memory::Region::Access::ReadWrite, m_dma_buffer_page);
if (region_or_error.is_error())
TODO();
m_dma_buffer_region = region_or_error.release_value();