RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-27 08:07:34 +00:00
Code Issues Activity Actions

Kernel: Use DMA helper everywhere

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

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);