STRUCT DPAA2_FD(9)

💅 struct dpaa2_fd — the manual page, but make it make sense

okay bestie, so this is struct dpaa2_fd(9) straight out of the Kernel API Manual, and it's literally the blueprint for a Frame Descriptor. stay with me, it's shorter than it looks 🫶

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✨ NAME ✨

struct dpaa2_fd — the struct that describes FDs. yes, that's the whole name section, she's concise 👑

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🌸 SYNOPSIS 🌸

here's the shape of her, copy it exactly, no cap:

struct dpaa2_fd {
    union {
      u32 words[8];
      struct dpaa2_fd_simple {
        __le64 addr;
        __le32 len;
        __le16 bpid;
        __le16 format_offset;
        __le32 frc;
        __le32 ctrl;
        __le64 flc;
      } simple;
    };
 };

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🎀 MEMBERS 🎀

• {unnamed_union} — anonymous. she has no name, she simply is 💫
• words — for easier/faster copying the whole FD structure. it's giving speedrun energy 🏃‍♀️
• simple — the struct for the FD fields. the actual vibes, field by field.
• simple.addr — address in the FD
• simple.len — length in the FD
• simple.bpid — buffer pool ID
• simple.format_offset — format, offset, and short-length fields. three besties sharing one field, iconic 💅
• simple.frc — frame context
• simple.ctrl — control bits...including dd, sc, va, err, etc. yes the original literally says "etc", she's mysterious like that 🙈
• simple.flc — flow context address

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🦋 DESCRIPTION 🦋

so like, this structure represents the basic Frame Descriptor used in the system. that's the whole description. short queen, main character energy, doesn't overexplain 🌈

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💜 SEE ALSO 💜

the whole friend group, fr fr — go read all of these:

Kernel file ./include/soc/fsl/dpaa2-fd.h DPAA2 FD - Frame Descriptor APIs for DPAA2(9), dpaa2_fd_get_addr(9), dpaa2_fd_set_addr(9), dpaa2_fd_get_frc(9), dpaa2_fd_set_frc(9), dpaa2_fd_get_ctrl(9), dpaa2_fd_set_ctrl(9), dpaa2_fd_get_flc(9), dpaa2_fd_set_flc(9), dpaa2_fd_get_len(9), dpaa2_fd_set_len(9), dpaa2_fd_get_offset(9), dpaa2_fd_set_offset(9), dpaa2_fd_get_format(9), dpaa2_fd_set_format(9), dpaa2_fd_get_bpid(9), dpaa2_fd_set_bpid(9), struct dpaa2_sg_entry(9), dpaa2_sg_get_addr(9), dpaa2_sg_set_addr(9), dpaa2_sg_get_len(9), dpaa2_sg_set_len(9), dpaa2_sg_get_offset(9), dpaa2_sg_set_offset(9), dpaa2_sg_get_format(9), dpaa2_sg_set_format(9), dpaa2_sg_get_bpid(9), dpaa2_sg_set_bpid(9), dpaa2_sg_is_final(9), dpaa2_sg_set_final(9), struct dpaa2_fl_entry(9), dpaa2_fl_get_addr(9), dpaa2_fl_set_addr(9), dpaa2_fl_get_frc(9), dpaa2_fl_set_frc(9), dpaa2_fl_get_ctrl(9), dpaa2_fl_set_ctrl(9), dpaa2_fl_get_flc(9), dpaa2_fl_set_flc(9), dpaa2_fl_get_len(9), dpaa2_fl_set_len(9), dpaa2_fl_get_offset(9), dpaa2_fl_set_offset(9), dpaa2_fl_get_format(9), dpaa2_fl_set_format(9), dpaa2_fl_get_bpid(9), dpaa2_fl_set_bpid(9), dpaa2_fl_is_final(9), dpaa2_fl_set_final(9)

ngl that's a lot of getters and setters and every single one of them is invited to the function 💀

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⭐ sign-off ⭐

this page lives at ./include/soc/fsl, it's dated October 2026, and it's struct dpaa2_fd(9) from the Kernel API Manual. periodt. go touch some __le64 fields bestie 🍓💖