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punktfunk/crates
enricobuehler c21549c136
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feat(host/windows,drivers): gamepad driver attach/heartbeat health surfaced in logs
The gamepad drivers have no IOCTL plane (hidclass gates the stack), so
until now the host had ZERO visibility into whether a driver ever
bound: a pad could be "created" with no driver installed and nothing
was logged. Two health fields are carved from reserved shm space
(layout-compatible; pf-driver-proto pins the offsets): driver_proto —
stamped by pf-xusb at device add + per serviced XInput IOCTL (movement
= the game-visible path) and by pf-dualsense/DS4 from its ~125Hz timer
— and driver_heartbeat. Host-side, every pad owns a DriverAttach
watcher fed from the existing service() poll: INFO on attach (WARN on
proto mismatch), and after 3s of silence ONE diagnosis WARN combining
a cached pnputil /enum-drivers store check, the devnode's CM problem
code (CM_Locate_DevNodeW/CM_Get_DevNode_Status on the instance id now
captured from the create callback, with plain-language hints: 28 = not
installed, 52 = signature/Memory Integrity, …) and the driver's debug
log path. Also fixes a real bug both SwDeviceCreate wrappers shared:
the 10s WaitForSingleObject result was ignored and the callback
HRESULT zero-initialised, so a PnP timeout read as SUCCESS (now E_FAIL
init + explicit timeout error). Failure-mode table:
design/gamepad-driver-health.md.

Linux workspace green; Windows host + drivers CI-compile only, on-box
recipe at the bottom of the design doc.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-02 16:33:56 +00:00
..