Module vmm 

Virtual memory management (Runtime API).

Mirrors [baracuda_driver::vmm]. Workflow:

1. Reserve a VA range: address_reserve.
2. Create a physical allocation: MemHandle::new.
3. Map the allocation onto the VA range: map.
4. Set access rights: set_access.
5. Use the pointer like any other device buffer.
6. unmap, drop the MemHandle, address_free.

Structs

MemHandle

A physical VMM allocation handle. Drop releases it.

Functions

address_free^⚠

Release a reserved VA range.

address_reserve

Reserve a contiguous virtual-address range. Returns a device pointer.

allocation_granularity

Minimum allocation size and VA-alignment granularity for prop. option: 0 = minimum, 1 = recommended.

device_alloc_prop

Build the allocation-properties struct for a fresh device-backed VMM allocation.

get_access^⚠

Query access flags for device at ptr.

map^⚠

Map the physical allocation handle onto [ptr + offset, ptr + offset + size).

set_access^⚠

Grant the given access rights to a device for a mapped region.

unmap^⚠

Unmap [ptr, ptr + size).