enricobuehler
ee104022ac
Major on-glass progress on the RTX box. The all-Rust wdk-sys IddCx driver now LOADS under Secure Boot and runs the ENTIRE init chain: DriverEntry -> WdfDriverCreate -> driver_add -> IddCxDeviceInitConfig(0x0) -> WdfDeviceCreate -> CreateDeviceInterface -> IddCxDeviceInitialize -> D0Entry -> init_adapter. Findings: - Signing was a RED HERRING (the driver loads); std works in WUDFHost (DualSense uses it too). - THE unblock: link the iddcx **1.10** IddCxStub (build.rs now picks the highest version-aware), not 1.0 — the 1.0 stub lacks the version-table symbols AND its dispatch table mismatched the 1.10 framework, which made IddCxDeviceInitConfig return INVALID_PARAMETER. With 1.10 the whole chain runs. - Added a file/OutputDebugString logger (log.rs, matches the DualSense driver) — the driver was silent; this is how the chain was traced. - size.rs: framework_struct_size() reads the frameworks authoritative struct sizes from IddStructures[] (the config keeps size_of=208, validated working). - adapter.rs: version ptrs + ObjectAttributes(InheritFromParent) + FP16 + framework caps/diag/version sizes — matches the oracle. KNOWN WIP: IddCxAdapterInitAsync still returns INVALID_PARAMETER though caps match the framework size table (88/56/24) + the oracle exactly — likely a subtle wdk-sys bindgen field-layout detail in IDDCX_ADAPTER_CAPS/IDDCX_ENDPOINT_DIAGNOSTIC_INFO. CI gate (compile+link) stays green. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
60 lines
3.0 KiB
Rust
60 lines
3.0 KiB
Rust
//! `.Size` for `IDD_CX_CLIENT_CONFIG` — the oracle's `IDD_STRUCTURE_SIZE!`, ported.
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//!
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//! IddCx structs are versioned. If the client (our headers) is NEWER than the running framework
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//! (`IddClientVersionHigherThanFramework != 0`), `size_of` of our struct is too big, so the framework's
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//! own `IddStructures[INDEX]` size must be used. Otherwise `size_of` is correct. `IddStructures` is null
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//! until IddCx initialises, so it must ONLY be read in the `higher` branch (the framework populates it
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//! exactly then). build.rs links the `iddcx>=1.3` stub that exports these symbols. Logged so we can see
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//! which branch + value the box actually takes.
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use wdk_sys::iddcx;
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/// The correct `.Size` for `IDD_CX_CLIENT_CONFIG`, or `None` if the struct is unusable on this framework.
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#[must_use]
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pub fn idd_cx_client_config_size() -> Option<u32> {
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let local = core::mem::size_of::<iddcx::IDD_CX_CLIENT_CONFIG>();
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// SAFETY: BOOLEAN static, read-only.
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let higher = unsafe { (&raw const iddcx::IddClientVersionHigherThanFramework).read() } != 0;
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dbglog!("[pf-vd] cfg size: higher={higher} size_of={local}");
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if !higher {
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return u32::try_from(local).ok();
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}
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// SAFETY: read-only; the framework populates the size table exactly when `higher` is true.
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let count = unsafe { (&raw const iddcx::IddStructureCount).read() };
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let index = iddcx::_IDDSTRUCTENUM::INDEX_IDD_CX_CLIENT_CONFIG as u32;
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if index >= count {
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dbglog!("[pf-vd] cfg size: index {index} >= count {count} -> None");
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return None;
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}
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// SAFETY: `IddStructures` is the framework's size table; `index` validated `< count`.
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let table = unsafe { (&raw const iddcx::IddStructures).read() };
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let fw = unsafe { table.add(index as usize).read() };
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dbglog!("[pf-vd] cfg size: framework={fw}");
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u32::try_from(fw).ok()
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}
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/// The framework's expected `.Size` for the `_IDDSTRUCTENUM` struct at `index`, or `None` if the size
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/// table isn't usable (index out of range / `IddStructures` not yet populated). The framework binds a
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/// specific IddCx version (the INF's `UmdfExtensions`), which can be OLDER than our headers — newer
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/// fields (e.g. `IDDCX_ADAPTER_CAPS::StaticDesktopReencodeFrameCount`) make `size_of` too big and
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/// `IddCxAdapterInitAsync` rejects it; this returns the size the framework actually expects.
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///
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/// Only call once the IddCx context is initialised (e.g. from `EvtDeviceD0Entry`, after
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/// `IddCxDeviceInitialize`) — `IddStructures` may be null before that.
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#[must_use]
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pub fn framework_struct_size(index: u32) -> Option<u32> {
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// SAFETY: read-only.
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let count = unsafe { (&raw const iddcx::IddStructureCount).read() };
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if index >= count {
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return None;
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}
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// SAFETY: read-only; `IddStructures` is the framework size table.
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let table = unsafe { (&raw const iddcx::IddStructures).read() };
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if table.is_null() {
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return None;
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}
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// SAFETY: `index` validated `< count`; `table` non-null.
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let size = unsafe { table.add(index as usize).read() };
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u32::try_from(size).ok()
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}
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