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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.
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