Robert Allan JamesandClaude Sonnet 5
b031b802e3
FABRIC.md -> FABRIC-0.md FABRIC-2.md -> FABRIC-1.md FABRIC-3.md -> FABRIC-2.md (the current/living document) FABRIC-4.md unchanged (new #3 to follow separately) Every cross-reference repo-wide updated to match, including doc-comment citations inside kernel source (.c/.h) files -- done via an ordered placeholder substitution (FABRIC-3.md->placeholder2, FABRIC-2.md-> placeholder1, FABRIC.md->placeholder0, then placeholders resolved to final names) in a single pass per file to avoid double-shifting already-renamed references. One line in capsules/font.4th grew past the 64-char block-format limit as a side effect of the longer filename; shortened it and reverified with mkcapsule --lint (34/34 pass) before rebuilding. Verified 3-arch boot to ok> (amd64/aarch64/riscv64, each in the foreground) after the fix; logs and DoE CSVs from this session's verification runs included per this repo's own audit-artifact convention. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_019YcT3H2PQeyujrzjqS3Var
54 lines
2.4 KiB
C
54 lines
2.4 KiB
C
/*
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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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* Only one USB MSC device is supported (single-outstanding-transaction
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* scope, matching the xHCI driver it sits 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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