7 Commits

Author	SHA1	Message	Date
enricobuehler	1262fec2ae	perf(zerocopy/vulkan): LN4 — global-priority VkBridge queue for the LINEAR/gamescope CSC ... The RGB→NV12 compute CSC shares the SMs with the game; request an elevated global-priority queue (VK_KHR/EXT_global_priority) so the driver can schedule it ahead. PUNKTFUNK_VK_QUEUE_PRIORITY = off|high|realtime (default realtime), downgrading REALTIME→HIGH→none on NOT_PERMITTED/INITIALIZATION_FAILED — a refused class never fails the bridge. Mirrors PyroWave's ac0e7332 (same honest caveat: WDDM didn't move; the Linux driver may — contended-tail lever, correct and harmless either way). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>	2026-07-20 20:12:42 +02:00
enricobuehler	cd36c46388	perf(encode/nvenc-linux): LN2 v1 — stream-ordered submit via NvEncSetIOCudaStreams ... Bind the session's IO streams to the encode thread's high-priority copy stream: in sync-retrieve depth-1 use the per-frame input copy and cursor blend now enqueue with NO cuStreamSynchronize and encode_picture orders after them on the stream. Same stream both directions, so the encode's completion is inserted into the stream and later work (the next frame's copy into a reused ring slot) waits for it. Soundness gate: the fast path engages only when pending is empty (true depth-1 usage) — every prior encode was drained by a blocking poll, and the caller holds the frame payload across the matching poll (contract now documented on Encoder::submit; both host loops already comply). Pipelined callers and PUNKTFUNK_NVENC_ASYNC mode keep the blocking copies. True zero-copy input registration (registering the worker-owned IPC buffer directly) stays the LN2 v2 follow-up — it needs a contiguous worker-pool NV12 layout and a registration<->IPC-mapping lifetime tie. PUNKTFUNK_NVENC_STREAM_ORDERED=0 restores the old blocking behavior. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>	2026-07-20 19:38:22 +02:00
enricobuehler	26ff005e70	fix(zerocopy): error-path leaks, exception-safe fence wait, odd-height NV12 overrun, worker reaper deadline ... Seven medium findings from the round-1 sweep, all in pf-zerocopy. Adjudicated against source; all zero-copy-preserving (no GPU→CPU→GPU roundtrip introduced). - import_src (vulkan.rs) leaked a VkBuffer + VkDeviceMemory + dup'd fd on every fallible step before the success-only src_cache.insert. A failed import is survived by the worker and RETRIED by the caller every frame, so this leaked per frame for the worker's whole lifetime. Now owns the dup fd via OwnedFd (closes on early return until Vulkan consumes it at allocate_memory) and destroys the buffer + frees memory on each error path. - ensure_dst destroyed the old exportable buffer and nulled self.dst BEFORE building the replacement, so a failed rebuild both dropped the working buffer and leaked every object the partial rebuild created (raw ash handles, no Drop; VkBridge::drop only frees the live self.dst). Now builds fully, unwinds each error locally, and swaps only on success. - The submit→wait→reset sequence in import_linear_nv12 / import_linear `?`-ed out of wait_for_fences BEFORE reset_fences on a TIMEOUT/DEVICE_LOST, leaving the shared self.cmd PENDING and self.fence IN-USE while the caller retries on the same bridge (and ensure_dst later destroys dst.buffer assuming nothing is in flight). Now drains the GPU (device_wait_idle) and resets the fence before propagating — fixing the reported ensure_dst UAF at its source. - copy_pitched_nv12_to_buffer writes height.div_ceil(2) chroma rows into a UV plane sized at height/2, so an odd height overruns by one uv_pitch row (OOB device write / CUDA_ERROR_ILLEGAL_ADDRESS). Added the even-dimension guard to import_linear_nv12, matching Nv12Blit/Yuv444Blit. - sweep_reaper only reaped already-exited workers, so a worker wedged inside a driver call lingered forever holding its CUcontext + BufferPool (hundreds of MB VRAM). Now force-kills a child parked past REAPER_KILL_DEADLINE (20s). Compile + tests green on Linux .21 (RTX 5070 Ti): pf-zerocopy 17/0. The error paths themselves are not fault-injected; the fixes are structural. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>	2026-07-19 23:10:06 +02:00
enricobuehler	986402f731	fix(inject,zerocopy,capture): teardown deadlock, GL→CUDA copy race, cursor-meta OOB read ... The three high-severity defects from the round-1 sweep of pf-inject / pf-zerocopy / pf-capture (adjudicated against source — all 7 reported criticals in these crates downgraded; these were the real highs). - pf-inject steam_gadget: `SteamDeckGadget::drop` set `running=false` then joined the control thread, which spends steady state parked in a blocking, no-timeout `EVENT_FETCH` ioctl that only tests `running` at its loop top. The flag never reaches it, closing the fd can't wake an in-flight ioctl (the syscall holds a file reference, and the fd is shared via Arc by the very threads being joined), so the join hung — and it runs on the session input thread via `PadSlots::sweep`, driven by the client's `active_mask`, so a remote peer clearing its pad bit could freeze all session input. Now wakes the parked threads with SIGUSR1 (no-op, non-SA_RESTART handler → the ioctl returns EINTR and the loop exits), retried until each reports done and bounded (~1s). - pf-zerocopy cuda: the GL→CUDA "sync point" was never established for the copy. `cuGraphicsMapResources`/`UnmapResources` were issued on the NULL stream, but the D2D copy runs on `copy_stream()`, a `CU_STREAM_NON_BLOCKING` stream exempt from implicit NULL-stream ordering — and the GL de-tile/CSC that produced the texture ends with only `glFlush` (no fence). So the copy could race ahead of the not-yet-retired GL draw: intermittent stale/torn frames under GPU load, on the default NVIDIA capture→encode path. Map, copy, and unmap now share `copy_stream()`, so map's device-side guarantee orders the GL work before the copy. Zero-copy preserved (no GPU→CPU→GPU roundtrip). - pf-capture cursor meta: `update_cursor_meta` trusted three producer-written fields (bitmap_offset, pixel offset, stride) with no bound against the metadata region, driving OOB pointer arithmetic and an oversized `from_raw_parts` — an OOB read that SIGSEGVs inside the PipeWire `.process` callback (uncatchable by the surrounding `catch_unwind`). Switched to `spa_buffer_find_meta` to obtain the region's real `size` and validate every offset with checked arithmetic before each deref/slice, mirroring the fd-length guard the main frame path already applies. Compile + existing tests green on Linux .21 (real RTX 5070 Ti): pf-inject 74/0, pf-zerocopy 17/0, pf-capture 1/0. The gadget deadlock path only executes on a SteamOS host with raw_gadget/dummy_hcd (not reproducible on the CachyOS box), so that fix is reasoned + compile-verified, not runtime-exercised. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>	2026-07-19 22:53:15 +02:00
enricobuehler	5e1e64e50b	perf(latency): T2.5b — NV12 compute CSC on the LINEAR/gamescope zero-copy path ... design/latency-reduction-2026-07.md T2.5's Linux half: the LINEAR dmabuf path (gamescope's only offer) fed NVENC RGB, paying its internal RGB->YUV CSC on the SM the game is saturating — the exact contention §5.A removed everywhere else. The Vulkan bridge now carries a buffer-to-buffer RGB->NV12 compute shader (rgb2nv12_buf.comp, BT.709 limited, coefficient-identical to pf-encode's rgb2yuv.comp; whole-word writes so no 8-bit-storage feature is needed): import dmabuf -> dispatch CSC into the exportable buffer -> CUDA de-strides both planes into a pooled two-plane NV12 buffer. PUNKTFUNK_NV12 (default-on) now covers LINEAR; a CSC failure latches RGB for the stream (mid-frame fallback, no dropped frame); 4:4:4 LINEAR sessions stay RGB (never silently subsample). New ImportKind::LinearNv12 rides the existing worker IPC (appended last per the wire-tag rule); cursor stays downstream (blend_nv12). Validated: .21 clippy -D warnings (pf-zerocopy/pf-capture/host+nvenc) + 17 zero-copy tests. Owed: on-glass gamescope session (visual + dmon sm% check). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>	2026-07-17 20:14:20 +02:00
enricobuehler	22b352c1da	chore(release): bump workspace version to 0.13.0 ... The eight W6 leaf crates hardcoded 0.12.0 instead of inheriting the workspace version — switched to version.workspace = true so the next bump is one line again. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>	2026-07-17 16:32:35 +02:00
enricobuehler	85bc5b9a3f	refactor(host/W6.2): extract the Linux zero-copy GPU plumbing into the pf-zerocopy leaf crate ... linux/zerocopy/* (CUDA context/buffers + EGL/Vulkan dmabuf import + the isolated import worker) and linux/dmabuf_fence.rs move wholesale into crates/pf-zerocopy, so the coming pf-frame vocabulary crate (FramePayload::Cuda owns a DeviceBuffer) and the pf-encode/pf-capture subsystem crates can reach the GPU plumbing without the host orchestrator in between (plan §W6). Content stays Linux-only; the crate compiles to an empty lib elsewhere, so dependents carry a plain dependency. drm_fourcc deliberately does NOT move: it consumes the frame vocabulary (PixelFormat), which sits ABOVE pf-zerocopy — it lives with capture for now and moves into pf-frame next. cuda's ffi re-export bumps pub(crate)->pub (the raw CUdeviceptr vocabulary is consumed across the crate boundary by the encode backends). A crate::zerocopy shim module keeps every existing path valid until capture/encode themselves move out. Verified: Linux clippy -D warnings (pf-zerocopy --all-targets + host nvenc,vulkan-encode,pyrowave --all-targets) + 17/17 pf-zerocopy tests + 321/321 host tests; Windows clippy nvenc,amf-qsv --all-targets Finished exit 0. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>	2026-07-17 09:41:15 +02:00