| 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. |