Robert Allan JamesandClaude Sonnet 5
c54ea24aaf
Completes the CBW -> Data-In -> CSW chain for READ(10) started last commit. xhci_bot_read_data_in() and xhci_bot_receive_csw(), each a single Normal TRB on the bulk IN Transfer Ring via a new xhci_bulk_in_enqueue_and_ring() helper (mirrors the OUT-side helper from CBW send). All three stages now chain automatically via the existing deferred next_action pattern: CBW completion defers into Data-In, Data-In completion defers into CSW receive, CSW completion is where signature/tag/status validation happens. Data-In reads into a new fixed 512-byte bot_data_buf -- single-block scope for this increment, matches QEMU's usb-storage reported block size; xhci_bot_send_read10() now refuses rather than overflow/truncate if a request exceeds it. CSW validation (BOT spec section 5.2) checks dCSWSignature and dCSWTag (a new bot_last_tag field, latched from the CBW) before trusting bCSWStatus at all, so a garbled/misaligned CSW read can't be misread as a clean pass. usb_bot_csw_t follows the same struct-with-explicit-length-not-sizeof discipline as usb_bot_cbw_t. Verified live via a temporary probe (written, run once, log captured, reverted per this project's own probe convention), all three architectures, byte-identical: the full CBW -> Data-In -> CSW exchange completes cleanly, well-formed CSW with correct signature and echoed tag, no wedge, clean disconnect immediately after. The SCSI command itself reports CSW status FAILED against the current test fixture -- expected at this stage (no TEST UNIT READY / UNIT ATTENTION handling implemented yet, consistent with a fresh-attach unit-attention condition, not a transport-layer defect) and not root-caused further here; the BOT mechanism itself is confirmed correct end to end. Probe-free re-verification afterward on all three architectures. FABRIC-2.md Section X Milestone 2g's CSW checklist item marked done; "get one real READ(10) working end to end" stays explicitly open, distinguishing "the mechanism works" from "the SCSI command succeeds." Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01R4VMX6VSKCten8nGgaMkq4
experiments/
Design of Experiments (DoE) campaign data and analysis for the LithosAnanke kernel.
bare_metal/— the bare-metal DoE experiment: blind full-factorial 2⁴ runs measuring the L8 Jacquard mode selector's effect on the Steady-State Machine across amd64/aarch64/riscv64. Seeexperiments/bare_metal/README.mdfor the full directory layout (runs/,latest/,analysis/{charts,tables,report}).
Hosted-VM DoE campaigns (factorial/heartbeat/ablation studies) live under
docs/working/experiments/ instead — this top-level directory is
specifically the kernel/bare-metal side.