Documentation/ABI/stable/sysfs-driver-qaic

Source file repositories/reference/linux-study-clean/Documentation/ABI/stable/sysfs-driver-qaic

File Facts

System: Linux kernel
Corpus path: Documentation/ABI/stable/sysfs-driver-qaic
Extension: [no extension]
Size: 1016 bytes
Lines: 20
Domain: Support Tooling And Documentation
Bucket: Documentation
Inferred role: Support Tooling And Documentation: Documentation
Status: atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

No C-style include directives detected by the generator.

Detected Declarations

No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

What:		/sys/bus/pci/drivers/qaic/XXXX:XX:XX.X/accel/accel<minor_nr>/dbc<N>_state
Date:		October 2025
KernelVersion:	6.19
Contact:	Jeff Hugo <jeff.hugo@oss.qualcomm.com>
Description:	Represents the current state of DMA Bridge channel (DBC). Below are the possible
		states:

		===================	==========================================================
		IDLE (0)		DBC is free and can be activated
		ASSIGNED (1)		DBC is activated and a workload is running on device
		BEFORE_SHUTDOWN (2)	Sub-system associated with this workload has crashed and
					it will shutdown soon
		AFTER_SHUTDOWN (3)	Sub-system associated with this workload has crashed and
					it has shutdown
		BEFORE_POWER_UP (4)	Sub-system associated with this workload is shutdown and
					it will be powered up soon
		AFTER_POWER_UP (5)	Sub-system associated with this workload is now powered up
		===================	==========================================================
Users:		Any userspace application or clients interested in DBC state.

Annotation

Atlas domain: Support Tooling And Documentation / Documentation.
Implementation status: atlas-only.

Implementation Notes

This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.