STRUCT CDNS2_TRB(9)

💫 struct cdns2_trb(9) — the Kernel API Manual moment 💫

okay bestie, so we're in the kernel API manual, section 9, and today's main character is struct cdns2_trb — the Transfer Descriptor block</> 🎀. That's the NAME, and honestly? Iconic.

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✨ SYNOPSIS ✨

struct cdns2_trb {
    __le32 buffer;
    __le32 length;
    __le32 control;
 };

like… that's it. three little fields. so clean. so slay. 💅

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🫶 Members 🫶

• buffer — a pointer to the buffer data 🦋 (yes, that's the whole vibe)
• length — the length of the data, no cap 📏
• control — the control flags 🌸

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🌈 Description 🌈

okay so this structure describes the transfer block handled by the DMA module. that's literally it, that's the whole thing. it's giving "small struct, big job" energy fr fr 👑

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💜 SEE ALSO 💜

bestie this list is LONG, hydrate before you read it 🍓

• Kernel file ./drivers/usb/gadget/udc/cdns2/cdns2-gadget.h
• struct cdns2_ep0_regs(9)
• struct cdns2_epx_base(9)
• struct cdns2_epx_regs(9)
• struct cdns2_interrupt_regs(9)
• struct cdns2_usb_regs(9)
• struct cdns2_adma_regs(9)
• struct cdns2_ring(9)
• struct cdns2_endpoint(9)
• struct cdns2_request(9)
• struct cdns2_device(9)

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ngl this whole thing lives in ./drivers/usb/gadget/udc/cdns2 so go read the neighbors too, iykyk 💀

⭐ okay that's the page!! sourced from ./drivers/usb/gadget/udc/cdns2, dated October 2026, and yeah — it's struct cdns2_trb(9) all the way down, periodt. bye bestie, go write some DMA 💖🧚‍♀️🌷