STRUCT MLX5_FPGA_DMA_BUF(9)

✨ struct mlx5_fpga_dma_buf(9) ✨

okay bestie, welcome to the Kernel API Manual 💖 this lil page is literally all about struct mlx5_fpga_dma_buf and it's giving peak main-character energy for your packet buffers, no cap 🎀

🌸 NAME 🌸

struct mlx5_fpga_dma_buf — a packet buffer, and the way it may contain up to 2 scatter-gather data entries. that's it. two. iconic minimalism honestly 🦋

✨ SYNOPSIS ✨

struct mlx5_fpga_dma_buf {
    enum dma_data_direction dma_dir;
    struct mlx5_fpga_dma_entry sg[2];
    struct list_head list;
    void (*complete)(struct mlx5_fpga_conn *conn, struct mlx5_fpga_device *fdev, struct mlx5_fpga_dma_buf *buf, u8 status);
};

like… look at her. the whole struct. stunning 💅

👑 Members 👑

• dma_dir — the DMA direction, aka which way the data is vibing 🧭
• sg — scatter-gather entries that point to the data in memory. it's an array, bestie, and it holds up to 2 entries 🌈
• list — this one's an item in the SQ backlog, specifically for TX packets 📬
• complete — the completion routine, also for TX packets. and omg it has its own lil squad of parameters, let me break it down for u 🫶
  • conn: FPGA Connection this packet was sent to
  • fdev: FPGA device this packet was sent to
  • buf: The packet buffer
  • status: 0 if successful, or an error code otherwise

💜 SEE ALSO 💜

• Kernel file ./drivers/net/ethernet/mellanox/mlx5/core/fpga/sdk.h
• Innova SDK(9)
• enum mlx5_fpga_access_type(9)
• struct mlx5_fpga_dma_entry(9)
• struct mlx5_fpga_conn_attr(9)
• mlx5_fpga_sbu_conn_create(9)
• mlx5_fpga_sbu_conn_destroy(9)
• mlx5_fpga_sbu_conn_sendmsg(9)
• mlx5_fpga_mem_read(9)
• mlx5_fpga_mem_write(9)
• mlx5_fpga_get_sbu_caps(9)

like go read those too, they're all part of the friend group fr fr 💀🔥

aaaand that's the whole page, bestie!! 🎀 this one came from ./drivers/net/ethernet/mellano... and it's dated October 2026, so yeah — go forth and buffer those packets, you absolute icon 👑💖