Claude
3bd81097e1
The header scan (Captain Bob, 2026-11-10): 788 source files -- 351 with the
SL-1.0 header, 12 with the old name (docs/working/experiments, kept by
ruling), 31 under someone else's licence (tools/kconfig, Linux's, GPL-2.0:
kept), and 394 with none. Ruled: the SPDX form; capsules (.4th, .f18) and
proofs (.thy) left for a ruling of their own (mkcapsule's 64x16 block format,
content-addressed capsules).
253 files now begin
SPDX-License-Identifier: LicenseRef-Starship-1.0
Copyright (c) 2023-2026 Robert A. James
as a /* */ block (C, headers, assembly, linker scripts) or # lines (scripts,
Makefiles, Kconfig; below a shebang or a coding line); tools/mkcapsule.c,
which had the copyright line, gets the SPDX line only.
Not touched: docs/working/ (archive and old campaign material, as the
ruling kept the experiments); v4/system/post_cases.c (generated by
v4/tools/mkpost.py, "do not edit" -- the generator has the header).
Comments only: the kernel builds on amd64, aarch64, riscv64; make -C v4
test-32: 39 programs, 0 failures; every changed script parses.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GE3SDvQn5EoxdGufk84zz2
63 lines
2.9 KiB
C
63 lines
2.9 KiB
C
/* SPDX-License-Identifier: LicenseRef-Starship-1.0
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* Copyright (c) 2023-2026 Robert A. James
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*/
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/*
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* blkio_usb.h — USB Mass Storage (Bulk-Only Transport) blkio_dev backend
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* for StarKernel, Milestone 2h. Presents a blkio_dev_t interface for
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* attachment to the StarForth block subsystem via blk_subsys_attach_device(),
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* matching virtio_blk.h's own precedent — built on top of the xHCI BOT
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* driver's synchronous bridge (xhci_bot_wait_for_idle(), xhci_bot_get_capacity(),
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* xhci_bot_read_block()) from Milestone 2h's foundational increment.
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*
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* Read-write since 2026-08-28 (FABRIC-2.md §F.1): SCSI WRITE(10) is real
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* (xhci_bot_send_write10()/xhci_bot_write_block()/xhci_bot_write_data_out(),
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* xhci.c), mirroring READ(10)'s existing CBW/data-stage/CSW machinery with
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* the data direction flipped. Verified live on amd64: BLK-CONFIRM-FORMAT's
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* BAM/reloc zero-page writes and an explicit block content write both
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* survived a cold reboot and read back correctly.
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*
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* FABRIC-3.md §VII (2026-09-05): multiple simultaneously-attached USB MSC
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* devices are now supported -- each open() call is backed by its own
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* per-slot state (blkio_usb.c's own registry, keyed by xHCI slot ID,
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* mirroring xhci_dev_t's msc_slots[]). The underlying xHCI/BOT command
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* machinery still runs one bulk transfer at a time across the whole
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* controller (real xHCI semantics, not a limitation introduced here) --
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* see xhci_msc_slot_t's own doc comment for the persistent-vs-in-flight
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* distinction this rests on.
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*/
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#ifndef STARKERNEL_BLKIO_USB_H
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#define STARKERNEL_BLKIO_USB_H
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#include <stdint.h>
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#include "blkio.h"
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#include "starkernel/xhci_driver.h"
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/*
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* blkio_usb_open_msc — synchronously query a confirmed Mass Storage/BOT
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* device's capacity (SCSI READ CAPACITY(10), via
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* xhci_bot_get_capacity() + xhci_bot_wait_for_idle())
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* and fill in *dev_out so the caller can pass it to
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* blk_subsys_attach_device().
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*
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* xdev/slot_id identify an already-enumerated, already-configured Mass
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* Storage/BOT device (SET_CONFIGURATION already succeeded) — this function
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* does not enumerate or configure anything itself.
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*
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* MUST be called from outside xhci_poll_events()'s own call frame, same
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* constraint as xhci_bot_wait_for_idle() itself (see its own doc comment
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* in xhci_driver.h) — this function calls it directly.
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*
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* dev_out must point to a zero-initialised blkio_dev_t.
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*
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* Returns 0 on success.
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* Returns -1 if xdev/slot_id are invalid, or the capacity query didn't PASS.
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* Returns -2 if the device's reported SCSI block size doesn't evenly divide
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* BLKIO_FORTH_BLOCK_SIZE (1024) — this backend has no way to
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* serve a partial Forth block, so it refuses rather than
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* silently misbehaving.
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*/
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int blkio_usb_open_msc(blkio_dev_t *dev_out, xhci_dev_t *xdev, uint32_t slot_id);
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#endif /* STARKERNEL_BLKIO_USB_H */
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