mirror of
https://github.com/RGBCube/serenity
synced 2025-07-25 05:07:34 +00:00
Kernel: Move AHCIPort::ScatterList to VM::ScatterGatherList
We want to move this out of the AHCI subsystem into the VM system, since other parts of the kernel may need to perform scatter-gather IO. We rename the current VM::ScatterGatherList impl that's used in the virtio subsystem to VM::ScatterGatherRefList, since its distinguishing feature from the AHCI scatter-gather list is that it doesn't own its buffers.
This commit is contained in:
parent
b63b15eeb5
commit
8131c0de8c
11 changed files with 53 additions and 46 deletions
|
@ -8,10 +8,21 @@
|
|||
|
||||
namespace Kernel {
|
||||
|
||||
ScatterGatherList ScatterGatherList::create_from_buffer(const u8* buffer, size_t size)
|
||||
NonnullRefPtr<ScatterGatherList> ScatterGatherList::create(AsyncBlockDeviceRequest& request, NonnullRefPtrVector<PhysicalPage> allocated_pages, size_t device_block_size)
|
||||
{
|
||||
return adopt_ref(*new ScatterGatherList(request, allocated_pages, device_block_size));
|
||||
}
|
||||
|
||||
ScatterGatherList::ScatterGatherList(AsyncBlockDeviceRequest& request, NonnullRefPtrVector<PhysicalPage> allocated_pages, size_t device_block_size)
|
||||
: m_vm_object(AnonymousVMObject::create_with_physical_pages(allocated_pages))
|
||||
{
|
||||
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);
|
||||
}
|
||||
|
||||
ScatterGatherRefList ScatterGatherRefList::create_from_buffer(const u8* buffer, size_t size)
|
||||
{
|
||||
VERIFY(buffer && size);
|
||||
ScatterGatherList new_list;
|
||||
ScatterGatherRefList new_list;
|
||||
auto* region = MM.find_region_from_vaddr(VirtualAddress(buffer));
|
||||
VERIFY(region);
|
||||
while (size > 0) {
|
||||
|
@ -25,20 +36,20 @@ ScatterGatherList ScatterGatherList::create_from_buffer(const u8* buffer, size_t
|
|||
return new_list;
|
||||
}
|
||||
|
||||
ScatterGatherList ScatterGatherList::create_from_physical(PhysicalAddress paddr, size_t size)
|
||||
ScatterGatherRefList ScatterGatherRefList::create_from_physical(PhysicalAddress paddr, size_t size)
|
||||
{
|
||||
VERIFY(!paddr.is_null() && size);
|
||||
ScatterGatherList new_list;
|
||||
ScatterGatherRefList new_list;
|
||||
new_list.add_entry(paddr.page_base().get(), paddr.offset_in_page(), size);
|
||||
return new_list;
|
||||
}
|
||||
|
||||
void ScatterGatherList::add_entry(FlatPtr addr, size_t offset, size_t size)
|
||||
void ScatterGatherRefList::add_entry(FlatPtr addr, size_t offset, size_t size)
|
||||
{
|
||||
m_entries.append({ addr, offset, size });
|
||||
}
|
||||
|
||||
void ScatterGatherList::for_each_entry(Function<void(const FlatPtr, const size_t)> callback) const
|
||||
void ScatterGatherRefList::for_each_entry(Function<void(const FlatPtr, const size_t)> callback) const
|
||||
{
|
||||
for (auto& entry : m_entries)
|
||||
callback(entry.page_base + entry.offset, entry.length);
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue