STRUCT CDNS3_ALIGNED_BUF(9)

💖 struct cdns3_aligned_buf(9) 💖

okay so bestie, welcome to the Kernel API Manual — yes we're reading kernel docs together, this is our bonding arc 🫶. Today's main character is struct cdns3_aligned_buf, and it's literally just the little guy that represents an aligned buffer used for DMA transfer. humble! iconic! necessary! ✨

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🌸 NAME 🌸

struct cdns3_aligned_buf — represent aligned buffer used for DMA transfer 💅

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🎀 SYNOPSIS 🎀

struct cdns3_aligned_buf {
    void *buf;
    dma_addr_t dma;
    u32 size;
    enum dma_data_direction dir;
    unsigned in_use:1;
    struct list_head        list;
 };

yes that's the whole vibe check right there, copied exactly, no notes 💀

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🦋 Members 🦋

okay so let's meet the cast one by one, no skipping, we appreciate every field here 👑

• buf — the aligned to 8 bytes data buffer, bestie. and lowkey important: the buffer address used in TRB shall be aligned to 8. so like, shall. that's not a suggestion, that's a whole requirement 🌈
• dma — the dma address. that's it, that's the field, it's giving "shows up, does its job, leaves" 💜
• size — size of buffer. short king of a description but fr fr essential 📏
• in_use — inform if this buffer is associated with usb_request. literally the yes/no girlie of the struct 🎀
• list — used to adding instance of this object to list. so it's the friend who introduces you to the whole group chat 😭🫶

side note bestie: the struct definition up there also has a dir field of type enum dma_data_direction, but this page's Members list doesn't describe it. not me noticing 👀 — I'm just telling you what's on the page, nothing more, iykyk 🧚

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🔥 SEE ALSO 🔥

go read these next, we're doing a whole marathon, bring snacks 🍓:

• Kernel file ./drivers/usb/cdns3/cdns3-gadget.h struct cdns3_usb_regs(9), struct cdns3_trb(9), struct cdns3_endpoint(9), struct cdns3_request(9), struct cdns3_device(9)

like, that's the entire cdns3 extended universe and we're seated for all of it 🌟

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and that's the page!! slay 💅 this was ./drivers/usb/cdns3, October 2026, struct cdns3_aligned_buf(9) — mwah, go forth and align your buffers to 8, ily, bye 💖✨🎀