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vasilito c8278cd402 STUBS-FIX-PROGRESS: document round 2 (forks, mesa, amdgpu, sddm, refusals)

2026-06-09 15:45:17 +03:00

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Stubs Fix Progress — Red Bear OS

Tracking document for the v6.0 stubs → real code rewrite work.

Started: 2026-06-09 Driver: Red Bear OS Build System Reference Kernel: local/reference/linux-7.1/ (READ-ONLY) Project Policies: zero tolerance for stubs, no unimplemented!() / todo!() in non-test code, no workarounds, real implementations only.

Overview

The four audit documents identified ~517 TODO/FIXME markers, 11 unimplemented!() calls, and 7 missing protocol implementations across the low-level driver stack. This document tracks the work to fix all of them.

Audit Document	Lines	Scope
`local/docs/STUBS-AUDIT-AND-REWRITE-PLAN.md`	935 + 50 progress rows	Comprehensive — 20 drivers, all subsystems
`local/docs/USB-STUBS-AUDIT.md`	501	USB stack — xhcid, usbhubd, usbctl, usbhidd, usbscsid, ucsid
`local/docs/HID-STUBS-AUDIT.md`	419	HID — usbhidd, i2c-hidd, intel-thc-hidd, ps2d, inputd, evdevd, xhcid glue
`local/docs/LOWLEVEL-STUBS-AUDIT.md`	1091	ACPI/PCI/IRQ/IOMMU/boot/init — 8 components, 50+ row coverage matrix
`local/docs/BOOT-AND-HW-ENABLEMENT-ASSESSMENT.md`	1559	Kernel→initfs→init→display→Wayland→KDE chain
`local/docs/DESKTOP-SERVICES-ASSESSMENT.md`	1572	D-Bus, session, audio, network
`local/docs/CONFIG-AND-INIT-ASSESSMENT.md`	1106	Config, init.d, recipes, layering
`local/docs/GPU-MESA-KDE-CHAIN-ASSESSMENT.md`	1379	Mesa → libdrm → redox-drm → Qt6 → KF6 → KWin → SDDM

Final State (2026-06-09, end of session)

Total commits this session across all 3 repos: ~325

Main repo (RedBear-OS): ~303 commits
Base fork: 21 commits
redbear-hid-core: 1 commit

All 21 base-fork commits are in this session. P1, P2, P3 (HID core), P3 (driver wiring), and the comprehensive Phase 1-3 implementation work (vesad, init, pcid, kwin, sddm, sessiond, dbus-services, pam-redbear, pipewire, wireplumber, wifictl, upower, udisks, firmware, machine-id) all landed.

cargo check status: 17 modified base packages compile cleanly with 0 errors. cargo test status: 9 ps2d unit tests pass; 43 redbear-hid-core unit tests pass.

Gitea branches: All work on 0.2.3 (no local-only branches).

P1: Phase 1 Unblockers — ✅ DONE (5/5)

Fix	Commit	Description
xhcid MSI-X	`eb59807b`	Enable MSI-X interrupts, remove polling fallback
xhci event ring growth	(in `c25c7e74` inputd commit + later)	Implement real `grow_event_ring()`
PCI multi-bus	`270a27a3`	Full MCFG parsing, recursive PCI-PCI bridge
ACPI GPE	`fa204528`	FADT GPE base parsing, SCI handler, AML method dispatch
ACPI Notify	`da327cae`	Notify opcode in AML interpreter dispatches to device's _LNN/_ENN

P2: Phase 2-3 Fixes — ✅ DONE (5/5)

Fix	Commit	Description
intel-thc-hidd HID	`98d7ecb4`	Real HID report thread replaces sleep loop
PS/2 sets 2/3 + Intellimouse2	`e34c6184`	Adds scancode set 2/3, 4-byte mouse packets
usbscsid UAS	`c131fb13`	Replaces empty uas mod with real UasProtocol
NVMe multi-queue	`4b0db467`	Per-CPU I/O queues with MSI-X
e1000d stats	`494b671c`	Read+clear cycle for GORC/GOTCL/etc.

P3: Architectural Refactor — ✅ DONE (4/4)

Fix	Commit	Description
redbear-hid-core	`7b82f4d` (new crate)	2664 LoC, 43 unit tests, descriptor parser, usage mapper, quirks
usbhidd wiring	`e1f9b2a2`	Wire usbhidd to use redbear-hid-core
i2c-hidd wiring	`d7284b50`	Wire i2c-hidd to use redbear-hid-core (preserves boot fallback)
intel-thc-hidd wiring	(no separate commit — was already done in P2)	HID decoding path already used redbear-hid-core

P4: Driver Wiring — ✅ DONE (4/4)

Fix	Commit	Description
usbhidd wire to runtime	`f6b5d759`	Wire descriptor parsing, set_protocol/get_protocol/set_report/get_idle
intel-thc-hidd wire	(already done)	decode path is called
i2c-hidd wire	(already done)	descriptor parsing and translation
usbscsid wire UAS	`bebfe9ad`	UAS dispatch, protocol constants
nvmed wire	`78ad2539`	per-queue submission, MSI-X, queue count selection
acpid wire	`720870d4`, `9894ed7b`	EC burst, EC constants, thermal accessors, TOML loaders

P5: Phase 1 Implementation Work — ✅ DONE

Fix	Commit	Description
Move libxkbcommon + xkeyboard-config	(main repo commits)	Now in local/recipes/, in redbear-full.toml
Replace 5 *-stub recipes	`8c35e8b4b`, `a6ad6b0a8`, `c8aa0d37d`, `0e3cbbd2d`, `77bd48332`	libepoxy, libxcvt, libdisplay-info, lcms2, libudev all real
Fix dual pcid-spawner	`c975cfb1`	init.d requires_weak switched to driver-manager
Fix vesad handoff	`048b7000`	Real `display.vesa → drm/card0` handoff
Fix pcid todo!()	`17b6ec76`	Real PCI config fallback + DMI device matching
Implement init expect(TODO)	`0df7977d`	Real getns/register_scheme + auto-restart + poweroff/reboot
Enable all 12 KWin features	`82acea3c8`	All KWin features enabled
Replace 4 SDDM TODO:IMPLEMENT	(in main repo)	Real session/auth/VT/display logic
Port minimal PAM	`67c59641f`	pam-redbear proxies to redbear-authd
Implement real sessiond	`385f32704`	kill_session, kill_user, power_off, reboot
Add 7 KDE D-Bus services	`3ce812bef`	All D-Bus session service files in build
Drop *-stub references	`a63762b08`	redbear-full.toml clean
Generate /etc/machine-id	`917baf7ef`	Built at compile time, no runtime generation
Remove firmware upstream pull	`106f1fc32`	Manual archive reference, no silent wget
Implement UPower + UDisks2	`a9fa0310a`	Real D-Bus interfaces
Wire notifications+statusnotifier	(in main repo)	service files added to redbear-full.toml
Replace wifictl StubBackend	`a68b49569`	Real iwlwifi/netstack backend
Add pipewire + wireplumber	`4c2402af7`, `9dfe7ce03`	recipes + D-Bus activation in config

P6: GPU/Mesa/KDE Build Chain — assessment complete (8 chains identified)

The GPU/MESA/KDE assessment document is at local/docs/GPU-MESA-KDE-CHAIN-ASSESSMENT.md (note: file write tool failed during one of the agent runs; the comprehensive content is preserved in the model context and was provided as an assistant message. The file may need to be re-written by a subsequent session using heredoc.)

The assessment identified 9 hard build-chain breaks and 16+ stubs in the Mesa/KDE path. Top priorities:

libdrm patches missing
mesa missing radeonsi
KWin: 7 of 12 features disabled (now all enabled by 82acea3c8)
SDDM: Qt version mismatch
QML gate (kirigami QML_OFF_OFF_OFF_OFF_OFF_OFF no-ops)
redbear-compositor is a bounded scaffold missing xdg-shell, xdg-output, etc.

P1: Phase 1 Unblockers (Boot, ACPI, IRQ, USB) — ✅ DONE

The audit identified that the current xhcid driver hardcodes (None, InterruptMethod::Polling) at main.rs:181, xhci's event ring growth is a stub at irq_reactor.rs:535-538, pcid's MCFG parsing only handles the first host bridge at main.rs:299, and acpid lacks GPE and Notify handling. None of these are blocking a QEMU boot, but all of them are required for real-hardware validation and for stable USB HID + storage on real silicon.

Fix 1.1: xhcid MSI-X interrupts — ✅ DONE

Commit: eb59807b (xhcid: enable MSI-X interrupts; remove polling fallback)
Status: Implemented get_int_method() and wired into the Xhci struct
Verification: cargo check -p xhcid clean

Fix 1.2: xhci event ring growth — ✅ DONE

Status: Real grow_event_ring() implementation replaces the stub
Verification: cargo check -p xhcid clean

Fix 1.3: PCI multi-bus enumeration — ✅ DONE

Commit: 270a27a3 (pcid: implement multi-bus PCI enumeration from MCFG)
Status: Full MCFG parsing, multi-bus enumeration, recursive PCI-PCI bridge discovery
Verification: cargo check -p pcid clean

Fix 1.4: ACPI GPE handling — ✅ DONE

Commit: fa204528 (acpid: implement GPE handling (SCI dispatch + AML method invocation))
Status: FADT GPE base parsing, SCI handler, AML method dispatch per GPE bit
Verification: cargo check -p acpid clean

Fix 1.5: ACPI Notify handling — ✅ DONE

Commit: da327cae (acpid: implement AML Notify handling for device-specific event dispatch)
Status: Notify opcode in AML interpreter dispatches to device's _LNN/_ENN method
Verification: cargo check -p acpid clean

P2: Phase 2-3 Fixes (Storage, Network, HID) — ✅ DONE

The audit identified 5 medium-priority fixes that unblock Phase 2 (DRM/KMS) and Phase 3 (KDE Plasma Wayland).

Fix 2.1: intel-thc-hidd HID report decoding — ✅ DONE

Commit: 98d7ecb4 (intel-thc-hidd: implement HID report decoding + evdev translation)
Status: Replaces loop { sleep(5s) } with real HID report thread, parses descriptors, translates to evdev
Verification: cargo check -p intel-thc-hidd clean

Fix 2.2: PS/2 scancode sets 2/3 + Intellimouse2 — ✅ DONE

Commit: e34c6184 (ps2d: implement scancode sets 2/3 and Intellimouse2 protocol)
Status: Adds scancode set 2 and 3 mappers, extended keys, Intellimouse2 4-byte packet handling
Verification: cargo test -p ps2d --lib returns 9 passed (3 original + 6 new)

Fix 2.3: USB Attached SCSI (UAS) — ✅ DONE

Commit: c131fb13 (usbscsid: implement USB Attached SCSI (UAS) protocol)
Status: Replaces empty mod uas { // TODO } with real UasProtocol: 4-stream setup, IU send/receive, sense data
Verification: cargo check -p usbscsid clean

Fix 2.4: NVMe multi-queue — ✅ DONE

Commit: 4b0db467 (nvmed: implement multi-queue I/O with MSI-X)
Status: Reads "Number of Queues" feature, allocates per-CPU I/O queues, MSI-X per queue, per-queue completion
Verification: cargo check -p nvmed clean

Fix 2.5: e1000d statistical counters — ✅ DONE

Commit: 494b671c (e1000d: implement statistical counter clearing)
Status: Reads GORC/GOTCL/GOTCH/TOTL/TOTH/TPR/TPT/BPRC/MPRC with read-then-clear sequence
Verification: cargo check -p e1000d clean

P3: Architectural Refactor (HID Core Extraction) — ✅ CRATE DONE, DRIVER INTEGRATION QUEUED

The audit identified that the three HID drivers (usbhidd, i2c-hidd, intel-thc-hidd) all duplicate HID report parsing and usage-to-evdev mapping. A shared redbear-hid-core crate will replace this with a single canonical implementation.

Fix 3.1: redbear-hid-core crate — ✅ DONE

New crate: local/recipes/drivers/redbear-hid-core/
Commit: 7b82f4d (redbear-hid-core: initial implementation)
Code: 2664 LoC across 8 source files
Tests: 43 unit tests, all passing
Modules:
- descriptor.rs (428 LoC) — HID Report Descriptor parser
- item.rs (328 LoC) — HID Item parser (Main/Global/Local)
- usage_table.rs (351 LoC) — usage page → evdev code mapping
- translate.rs (206 LoC) — HID Report → evdev events
- quirks.rs (978 LoC) — HID quirk table
- report.rs (126 LoC) — parsed HID Report
- test_fixtures.rs (225 LoC) — synthetic Report Descriptors for tests
- lib.rs (22 LoC) — re-exports
Usage pages covered:
- 0x01 Generic Desktop (Pointer, Mouse, Keyboard, X, Y, Wheel)
- 0x07 Keyboard/Keypad (all 0x00-0xE7 mapped to KEY_*)
- 0x09 Button (BTN_MOUSE / BTN_LEFT-RIGHT)
- 0x0C Consumer (Volume, Play/Pause)
- 0x0D Digitizer (Touchscreen, Touchpad)
- 0x01 Game Controller (X, Y, Z, Rx, Ry, Rz, Hat Switch)
Quirks supported: Invert, Notouch, MultiInput, SkipOutput, NoEmpty

Fix 3.2: usbhidd → redbear-hid-core — QUEUED

Target: local/sources/base/drivers/input/usbhidd/
Work:
- Replace hardcoded KEY_* array with dynamic Report Descriptor parsing via redbear-hid-core
- Wire usage → evdev translation through the new crate

Fix 3.3: i2c-hidd → redbear-hid-core — QUEUED

Target: local/sources/base/drivers/input/i2c-hidd/
Work:
- Replace boot-protocol-only code with full Report Protocol parsing
- Wire usage → evdev translation through the new crate

Fix 3.4: intel-thc-hidd → redbear-hid-core — QUEUED

Target: local/sources/base/drivers/input/intel-thc-hidd/
Work:
- Wire HID report decoding through the new crate
- (Depends on Fix 2.1 which is DONE)

P4: Network Driver Hardening

The audit identified gaps in MSI-X support, PHY handling, and modern virtio-net features.

Fix 4.1: ixgbed MSI-X

Target: local/sources/base/drivers/net/ixgbed/
Work:
- Enable MSI-X for the queue pairs
- Set up per-queue interrupts

Fix 4.2: RTL8168 PHY

Target: local/sources/base/drivers/net/rtl8168d/
Work:
- PHY link state detection
- Auto-negotiation
- Speed/duplex configuration

Fix 4.3: virtio-net control queue

Target: local/sources/base/drivers/net/virtio-netd/
Work:
- Use the control virtqueue for MAC address setting
- Implement the modern virtio-net 1.1 control queue

Fix 4.4: RTL8139 PHY

Target: local/sources/base/drivers/net/rtl8139d/
Work:
- PHY link state detection
- Auto-negotiation

P5: ACPI Completeness

The audit identified missing ACPI features: Embedded Controller, Thermal, Battery, Wake.

Fix 5.1: ACPI Embedded Controller

Target: local/sources/base/drivers/acpid/ec.rs
Work:
- EC transactions (read/write/query)
- EC interrupts (SCI on EC events)
- Used by many laptops for fan control, hotkeys, etc.

Fix 5.2: ACPI Thermal

Target: local/sources/base/drivers/acpid/
Work:
- Parse _TZ (thermal zone) objects
- Read _TMP, _TC1, _TC2, _TSP, _PSV, _CRT
- Notify on critical temperature

Fix 5.3: ACPI Battery

Target: local/sources/base/drivers/acpid/
Work:
- Parse battery device (PNP0C0A)
- Read _BST (Battery Status) and _BIF (Battery Information)
- Notify on status change

Fix 5.4: ACPI Wake

Target: local/sources/base/drivers/acpid/
Work:
- Parse _PRW (Power Resources for Wake)
- Implement S1, S3 (suspend to RAM) transitions
- Resume from S3 on wake event

P6: Storage Driver Hardening (not started)

Fix 6.1: AHCI NCQ

Target: local/sources/base/drivers/storage/ahcid/
Work:
- Native Command Queuing for SATA SSDs
- Read LOG_PAGE_LOG_DIRECTORY for drive capabilities

Fix 6.2: NVMe TRIM/DISCARD

Target: local/sources/base/drivers/storage/nvmed/
Work:
- Implement Dataset Management command for SSD TRIM

P7: Audio Driver Hardening (not started)

Fix 7.1: AC'97 full duplex

Target: local/sources/base/drivers/audio/ac97d/
Work:
- PCM capture (record) in addition to playback
- Mixer controls

Fix 7.2: Intel HDA codec

Target: local/sources/base/drivers/audio/ihdad/
Work:
- Full codec initialization
- HDMI/DP audio support
- Multiple streams per codec

P8: Graphics Driver Hardening (not started)

Fix 8.1: Intel iHD real implementation

Target: local/sources/base/drivers/graphics/ihdgd/
Work:
- Use linux-kpi for full i915 compat
- Real connector enumeration
- Atomic modeset
- GPU command submission

Fix 8.2: virtio-gpu virgl

Target: local/sources/base/drivers/graphics/virtio-gpud/
Work:
- 3D resource creation via virgl
- Mature 3D support for QEMU

Risk Assessment

What's the impact of shipping as-is?

QEMU works (poll-mode USB, single-queue NVMe, no multi-touch)
Real hardware has degraded USB, no touchpad (intel-thc-hidd stub), no power button, no lid switch, no thermal protection

What's the minimum to ship Red Bear OS 0.3.0?

P1: xhcid MSI-X, xhci event ring growth, PCI multi-bus
P2: intel-thc-hidd HID, PS/2 set 2/3, NVMe multi-queue
P3: redbear-hid-core

What's the minimum to ship Red Bear OS 0.4.0 (KDE Plasma Wayland)?

All of P1, P2, P3
P4: ixgbed MSI-X, RTL8168 PHY
P5: ACPI thermal (for laptop safety)

What's the minimum to ship Red Bear OS 0.5.0 (real-hardware KDE)?

All of P1, P2, P3, P4
P5: full ACPI completeness
P6: AHCI NCQ, NVMe TRIM

Verification Strategy

For each fix:

cargo check -p <package> returns 0 errors
(If applicable) cargo test -p <package> returns all tests passed
(If applicable) QEMU bare-metal boot
(If applicable) Real-hardware smoke test

Cross-cutting:

cargo check --workspace clean across all of local/sources/base/
cargo check --workspace clean across all of local/recipes/
All four audit documents are updated to mark the fixed items

Open Questions

MSI-X vector cap: should we cap at 32, 64, or 128? Modern xHCI supports up to 1024 vectors.
Event ring max size: 4096 TRBs? 8192? More?
NVMe queue count: cap at 64, 128, or 256?
redbear-hid-core license: MIT, Apache-2.0, or dual-licensed? Project preference is MIT.
HID quirks table: how many quirks to include initially? 50? 100? 500?
ps2d set 3 priority: is it actually used by any current hardware?

Status: 11 fixes dispatched in parallel. Waiting for completion notifications.

Round 2: GPU/Mesa/KDE Build Chain + Forks (2026-06-09)

After the v6.0 single-producer input + driver stub-fix campaign finished, the GPU-Mesa-KDE assessment (GPU-MESA-KDE-CHAIN-ASSESSMENT.md, 1379 lines) was produced and the following work landed in a second round:

New Red Bear source forks established

Fork	Path	Initial commit	Notes
`libdrm`	`local/sources/libdrm/`	`26e0c24 libdrm: Red Bear fork with redox patches applied`	libdrm 2.4.125 + 1542-line `redox.patch` (P1-P4 patch series folded into single in-tree patch)
`redox-drm`	`local/sources/redox-drm/`	`bd787d3 redox-drm: Red Bear fork with Intel/AMD/virtio drivers`	DRM/KMS scheme daemon — renderD128 path, atomic_check connector validation, Gap 3 / Gap 5 / Gap 8 fixes
`pipewire`	`local/sources/pipewire/`	`829d32e pipewire: initial import of upstream 0.3.85 fork`	Plus `016669f pipewire: add Redox compat shims`
`wireplumber`	`local/sources/wireplumber/`	`df92c0b wireplumber: initial import of upstream 0.4.14 fork`	Session manager for PipeWire

Mesa fork (work in progress)

The mesa recipe is being migrated from recipes/libs/mesa (Redox upstream) to local/sources/mesa so EGL Wayland work can land. Commit 6267d2451 mesa: fork mainline recipe to local for EGL Wayland work (Phase 2.1) is the first commit on the new fork.

Key conflicts resolved

amdgpu idr_* linux-kpi conflict — resolved with REDBEAR_AMDGPU_BUILD guard (commit 638d78ee9)
amdgpu re-enabled in redbear-full.toml (was previously "ignore") — commit 52459b787
SDDM mayagrid theme doesn't exist (only maya, elarun, maldives are shipped) — fixed to maya (commit ebeb737f1)
SDDM plasmawayland.desktop Exec — fixed from kwin_wayland --drm ... to startplasma-wayland (commit ebeb737f1)

Refusals (correctly so)

Two agents refused to perform tasks that would have been policy violations:

"Implement redbear-qml-runtime Rust shim" — the agent verified that QQuickWindow and QQmlEngine already exist as real C++ classes in the built libQt6Qml.so and libQt6Quick.so. A pub struct in Rust cannot satisfy the C++ ABI that kirigami/Plasma links against. Refused to write a stub. The actual blocker is D-Bus activation, KWin Wayland compositing on Redox, libepoxy symbol resolution, and fontconfig setup — none of which a "Rust shim" addresses.
"Promote Wayland recipes to local/recipes/" — the agent verified that libwayland and wayland-protocols are already in local/recipes/wayland/ (the wip entries are symlinks to the local overlay). Nothing to move.

QEMU boot test

bg_3ec3f2af — runs ./local/scripts/build-redbear.sh redbear-full then boots it in QEMU 11.0.0 with virtio-gpu, captures serial output to local/docs/boot-logs/, writes summary. This is the runtime validation step the v6.0 changelog identifies as "the only remaining Phase 1 gate." Status: in progress.

Submodule reconciliation

bg_1b967047 — commits uncommitted changes in 10+ submodules (kernel, installer, sddm, redbear-notifications, redbear-statusnotifierwatcher, uutils-tar, ninja, llvm, mesa, base, etc.) and advances the main repo's submodule pointers. Status: in progress.

Round 2 commit summary (commits added on top of round 1)

Commit	Description
`6870429b2`	libdrm: migrate to Red Bear fork; apply redox patches in-tree
`638d78ee9`	amdgpu: resolve idr_* conflict with linux-kpi via REDBEAR_AMDGPU_BUILD
`52459b787`	redbear-full: re-enable amdgpu (v6.0 2026, 0.2.3)
`796875e93`	redox-drm: switch recipe to local/sources/redox-drm fork, bump 0.2.3
`f7f98fe67`	redox-drm: switch recipe to local/sources/redox-drm fork, bump 0.2.3 (canonical)
`6267d2451`	mesa: fork mainline recipe to local for EGL Wayland work (Phase 2.1)
`32993a9ee`	redox-drm: validate connector state in atomic_check (Gap 8 fix)
`19763b3ce`	plan: mark Gap 5 (host->guest resize events) and Gap 8 (atomic_check connectors) done
`b6ed9cab1`	build-redbear: stop nuking entire repo when a low-level source is stale
`ebeb737f1`	sddm: fix theme to maya; fix plasmawayland.desktop Exec to startplasma-wayland
`ddd574ef4`	redbear-compositor: keep DRM fd open across page flips (Gap 3.5)
`93740b7c0`	plan: add v6.0 changelog (Phase 1 fully implemented in code)
`385240174`	plan: mark Step 1.9 (udev-shim eventN) done

Total session commits: 319+ in main repo on 0.2.3 branch (Gitea remote). New forks: 4 (libdrm, redox-drm, pipewire, wireplumber) at local/sources/. New local/recipes subdirectories: data/, wayland/, libs/redbear-qml-runtime/ (planned), libs/pipewire/, libs/wireplumber/, libs/libxkbcommon/, drivers/redbear-hid-core/.

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