STRUCT DWC3_EVENT_DEPEVT(9)

🦋 struct dwc3_event_depevt(9) — Device Endpoint Events 🦋

Kernel API Manual — okay bestie, we're in the USB DWC3 device endpoint event zone, and this struct is lowkey iconic. 💅

🌸 NAME 🌸

• struct dwc3_event_depevt — Device Endpoint Events, periodt. ✨

✨ SYNOPSIS ✨

       struct dwc3_event_depevt {
           u32 one_bit:1;
           u32 endpoint_number:5;
           u32 endpoint_event:4;
           u32 reserved11_10:2;
           u32 status:4;
         #define DEPEVT_STATUS_TRANSFER_ACTIVE   BIT(3);
         #define DEPEVT_STATUS_BUSERR    BIT(0);
         #define DEPEVT_STATUS_SHORT     BIT(1);
         #define DEPEVT_STATUS_IOC       BIT(2);
         #define DEPEVT_STATUS_LST       BIT(3) ;
         #define DEPEVT_STATUS_MISSED_ISOC BIT(3) ;
         #define DEPEVT_STREAMEVT_FOUND          1;
         #define DEPEVT_STREAMEVT_NOTFOUND       2;
         #define DEPEVT_STREAM_PRIME             0xfffe;
         #define DEPEVT_STREAM_NOSTREAM          0x0;
         #define DEPEVT_STATUS_CONTROL_DATA      1;
         #define DEPEVT_STATUS_CONTROL_STATUS    2;
         #define DEPEVT_STATUS_CONTROL_PHASE(n)  ((n) & 3);
         #define DEPEVT_TRANSFER_NO_RESOURCE     1;
         #define DEPEVT_TRANSFER_BUS_EXPIRY      2;
           u32 parameters:16;
         #define DEPEVT_PARAMETER_CMD(n) (((n) & (0xf << 8)) >> 8);
        };

🎀 Members 🎀

• one_bit — indicates this is an endpoint event (not used) — yeah, it's literally not used, bestie.
• endpoint_number — number of the endpoint. 🫶
• endpoint_event — the event we have, and it's giving a whole little menu:
  • 0x00 — Reserved
  • 0x01 — XferComplete
  • 0x02 — XferInProgress
  • 0x03 — XferNotReady
  • 0x04 — RxTxFifoEvt (IN->Underrun, OUT->Overrun)
  • 0x05 — Reserved
  • 0x06 — StreamEvt
  • 0x07 — EPCmdCmplt
• reserved11_10 — Reserved, don't use. 🙈 No cap, leave it alone.
• status — Indicates the status of the event. Refer to databook for more information. 👑 The databook has the lore, so go check it.
• parameters — Parameters of the current event. Refer to databook for more information. 💖

🦋 SEE ALSO 🦋

Kernel file ./drivers/usb/dwc3/core.h brings the whole friend group: struct dwc3_event_buffer(9), struct dwc3_ep(9), struct dwc3_trb(9), struct dwc3_hwparams(9), struct dwc3_request(9), struct dwc3_glue_ops(9), struct dwc3(9), struct dwc3_event_devt(9), struct dwc3_event_gevt(9), union dwc3_event(9), struct dwc3_gadget_ep_cmd_params(9), and dwc3_mdwidth(9). 🌈

source/version: ./drivers/usb/dwc3 · date: October 2026 · page: struct dwc3_event_depevt(9) — that's the whole manual page, bestie, ty for coming to my TED talk 💖✨