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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
5 changed files with 13 additions and 33 deletions
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8
Kernel/Storage/ATA/BMIDEChannel.cpp
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@ -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();