Gabriel Kaszewski
27be73f42d
feat: wire display + input servers to snake, fix QEMU 11.x GPU bug
VirtIO GPU: QEMU 11.x has RESOURCE_ATTACH_BACKING (0x0104) and
RESOURCE_FLUSH (0x0106) command types swapped in its legacy MMIO
VirtIO GPU implementation. Workaround: send swapped type values.
Confirmed via QEMU monitor (xp shows correct bytes in memory)
and QEMU trace events (device dispatches to wrong handler).
Display pipeline now works end-to-end:
adapter → GPU init → create_2d → attach_backing → set_scanout
display-server → clear(blue) → flush → transfer + resource_flush
snake → draw commands via IPC → display renders → flush to GPU
Input server:
- New driver-input-uart crate (reads UART at mapped VA 0x20000)
- New bins/input-qemu composition root
- Adapter loads input-server, maps UART MMIO into its address space
- Init delegates both display_ep (slot 0) and input_ep (slot 1) to snake
- WASD keys → UART → input-server → IPC → snake direction change
Snake game runs with display and input, exits on wall collision.