beenull/ladybird
1
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2024-09-30 00:31:14 +00:00
Code Issues Actions 5 Packages Projects Releases Wiki Activity

Kernel: Add DMA allocate functions that are TRY-able

Browse source 
Add DMA allocate buffer helper functions in MemoryManager.
This commit is contained in:
Pankaj Raghav 2021-12-16 20:35:51 +05:30 committed by Andreas Kling
parent 8489388e75
commit 602b35aa62
Notes: sideshowbarker 2024-07-18 05:01:22 +09:00 
Author: https://github.com/Panky-codes
Commit: https://github.com/SerenityOS/serenity/commit/602b35aa625
Pull-request: https://github.com/SerenityOS/serenity/pull/11222
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/FireFox317
Reviewed-by: https://github.com/Sylvyrfysh
Reviewed-by: https://github.com/awesomekling
Reviewed-by: https://github.com/supercomputer7 ✅
2 changed files with 21 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

19
Kernel/Memory/MemoryManager.cpp
View file

@ -733,6 +733,25 @@ ErrorOr<NonnullOwnPtr<Region>> MemoryManager::allocate_contiguous_kernel_region(
return allocate_kernel_region_with_vmobject(range, move(vmobject), name, access, cacheable);
}
ErrorOr<NonnullOwnPtr<Memory::Region>> MemoryManager::allocate_dma_buffer_page(StringView name, Memory::Region::Access access, RefPtr<Memory::PhysicalPage>& dma_buffer_page)
{
dma_buffer_page = allocate_supervisor_physical_page();
if (dma_buffer_page.is_null())
return ENOMEM;
auto region_or_error = allocate_kernel_region(dma_buffer_page->paddr(), PAGE_SIZE, name, access);
return region_or_error;
}
ErrorOr<NonnullOwnPtr<Memory::Region>> MemoryManager::allocate_dma_buffer_pages(size_t size, StringView name, Memory::Region::Access access, NonnullRefPtrVector<Memory::PhysicalPage>& dma_buffer_pages)
{
VERIFY(!(size % PAGE_SIZE));
dma_buffer_pages = allocate_contiguous_supervisor_physical_pages(size);
if (dma_buffer_pages.is_empty())
return ENOMEM;
auto region_or_error = allocate_kernel_region(dma_buffer_pages.first().paddr(), size, name, access);
return region_or_error;
}
ErrorOr<NonnullOwnPtr<Region>> MemoryManager::allocate_kernel_region(size_t size, StringView name, Region::Access access, AllocationStrategy strategy, Region::Cacheable cacheable)
{
VERIFY(!(size % PAGE_SIZE));

2
Kernel/Memory/MemoryManager.h
View file

@ -175,6 +175,8 @@ public:
void deallocate_physical_page(PhysicalAddress);
ErrorOr<NonnullOwnPtr<Region>> allocate_contiguous_kernel_region(size_t, StringView name, Region::Access access, Region::Cacheable = Region::Cacheable::Yes);
ErrorOr<NonnullOwnPtr<Memory::Region>> allocate_dma_buffer_page(StringView name, Memory::Region::Access access, RefPtr<Memory::PhysicalPage>& dma_buffer_page);
ErrorOr<NonnullOwnPtr<Memory::Region>> allocate_dma_buffer_pages(size_t size, StringView name, Memory::Region::Access access, NonnullRefPtrVector<Memory::PhysicalPage>& dma_buffer_pages);
ErrorOr<NonnullOwnPtr<Region>> allocate_kernel_region(size_t, StringView name, Region::Access access, AllocationStrategy strategy = AllocationStrategy::Reserve, Region::Cacheable = Region::Cacheable::Yes);
ErrorOr<NonnullOwnPtr<Region>> allocate_kernel_region(PhysicalAddress, size_t, StringView name, Region::Access access, Region::Cacheable = Region::Cacheable::Yes);
ErrorOr<NonnullOwnPtr<Region>> allocate_kernel_region_with_vmobject(VMObject&, size_t, StringView name, Region::Access access, Region::Cacheable = Region::Cacheable::Yes);