dwc_req_t Struct Reference

Detailed Description

Structure representing a USB transfer request.

This structure encapsulates the state and data associated with a single transfer request when operating in device mode. It includes information about the transfer descriptors, data buffers, and transfer progress.

Data Fields
dwc_usb3_dma_desc_t *	trb
dwc_dma_t	trbdma
u32	length
u32	actual
u32	stream
u32	flags
int	numbuf
char *	buf [DWC_MAX_DATA_BUFS]
dwc_dma_t	bufdma [DWC_MAX_DATA_BUFS]
u32	buflen [DWC_MAX_DATA_BUFS]

Field Documentation

trb

dwc_usb3_dma_desc_t* dwc_req_t::trb

Pointer to the TRB or TRB chain for this request.

trbdma

dwc_dma_t dwc_req_t::trbdma

DMA address of the TRB or TRB chain.

length

u32 dwc_req_t::length

Total length of the data buffers.

actual

u32 dwc_req_t::actual

Actual amount of data transferred.

stream

u32 dwc_req_t::stream

Stream number associated with this request.

flags

u32 dwc_req_t::flags

Request flags (bits 8-31 are OS-specific).

numbuf

int dwc_req_t::numbuf

Number of data buffers.

buf

char* dwc_req_t::buf[DWC_MAX_DATA_BUFS]

Array of pointers to data buffers.

bufdma

dwc_dma_t dwc_req_t::bufdma[DWC_MAX_DATA_BUFS]

Array of DMA addresses for data buffers.

buflen

u32 dwc_req_t::buflen[DWC_MAX_DATA_BUFS]

Array of lengths for data buffers.