STRUCT CDNSP_EP_CTX(9)

✨ NAME ✨

struct cdnsp_ep_ctx(9) — okay so this is the Kernel API Manual page for struct cdnsp_ep_ctx, and yes, the NAME line is literally just that. No extra subtitle energy here, bestie. 💅

🦋 SYNOPSIS 🦋

       struct cdnsp_ep_ctx {
           __le32 ep_info;
           __le32 ep_info2;
           __le64 deq;
           __le32 tx_info;
           __le32 reserved[3];
        };

💖 Members 💖

• ep_info — endpoint state, streams, mult, and interval information. It’s giving “all the endpoint state tea” ☕✨
• ep_info2 — info on endpoint type, max packet size, max burst size, error count, and whether the controller will force an event for all transactions. Lowkey a whole little info hub in one field.
• deq — 64-bit ring dequeue pointer address. If the endpoint only defines one stream, this points to the endpoint transfer ring. Otherwise, it points to a stream context array, which has a ring pointer for each flow. So yeah, one-stream girlies get the direct ring; multi-stream besties get the whole array 💫
• tx_info — average TRB lengths for the endpoint ring and max payload within an Endpoint Service Interval Time (ESIT). Periodt.

🌸 Description 🌸

Endpoint Context — this assumes the controller uses 32-byte context structures.

If the controller uses 64-byte contexts, there is an additional 32 bytes reserved at the end of the endpoint context for controller internal use. Ngl, that’s the vibe: bigger context, extra reserved space, controller keeps it for itself 🙈

🔮 SEE ALSO 🔮

Kernel file: ./drivers/usb/cdns3/cdnsp-gadget.h — and here’s the whole friend group:

• struct cdnsp_cap_regs(9)
• struct cdnsp_op_regs(9)
• struct cdnsp_port_regs(9)
• struct cdnsp_intr_reg(9)
• struct cdnsp_run_regs(9)
• struct cdnsp_rev_cap(9)
• struct cdnsp_doorbell_array(9)
• struct cdnsp_container_ctx(9)
• struct cdnsp_slot_ctx(9)
• struct cdnsp_stream_info(9)
• struct cdnsp_ep(9)
• struct cdnsp_device_context_array(9)
• struct cdnsp_transfer_event(9)
• struct cdnsp_link_trb(9)
• struct cdnsp_event_cmd(9)
• struct cdnsp_segment(9)
• struct cdnsp_td(9)
• struct cdnsp_dequeue_state(9)
• struct cdnsp_ring(9)
• struct cdnsp_erst_entry(9)
• struct cdnsp_erst(9)
• struct cdnsp_request(9)
• struct cdnsp_port(9)
• struct cdnsp_device(9)
• next_request(9)

mwah 💖 source/version flex: ./drivers/usb/cdns3, date: October 2026, and the footer is literally struct cdnsp_ep_ctx(9) — iconic, no cap. 🎀