select_sbcm_params(9)

💅 select_sbcm_params — Kernel API Manual 🎀

okay so bestie, welcome to the Kernel API Manual entry for select_sbcm_params(9) — the little function that decides which shared buffer pool config you're getting. it's giving matchmaker energy, honestly 🦋

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✨ NAME ✨

select_sbcm_params — literally the function that selects the shared buffer pool configuration. that's the whole job. she picks. 💅

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🌸 SYNOPSIS 🌸

const struct mlx5_sbcm_params * select_sbcm_params (struct
mlx5e_bufferx_reg *buffer , u8 lossless_buff_count );

like, she takes two things and gives you back a const struct mlx5_sbcm_params *. no cap. ✨

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🎀 ARGUMENTS 🎀

• buffer — <input> the port buffer you want to retrieve params of. it's the thing she's looking at, okay? 🫶
• lossless_buff_count — <input> the number of lossless buffers in total. yes, all of them, counted together. 🔢

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🦋 DESCRIPTION 🦋

so the selection is based on the following rules, and honestly the way they're laid out just makes sense:

1. If buffer size is 0, no shared buffer pool is used. that's it. nothing. empty. ghosted. 💀
2. If buffer is lossy, use the lossy shared buffer pool. periodt.
3. If there are more than 1 lossless buffers, use the lossless shared buffer pool with threshold. we love a threshold. 👑
4. If there is only 1 lossless buffer, use the lossless shared buffer pool without threshold. no threshold needed, she's simple like that. 🌸

return const struct mlx5_sbcm_params* selected values — that's the return, bestie. the selected values come back to you as this pointer. 💖

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⭐ SEE ALSO ⭐

• Kernel file ./drivers/net/ethernet/mellanox/mlx5/core/en/port_buffer.c — go read her, she's iconic 🔥
• update_buffer_lossy(9) — the girlies that go together 🫶

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and that's the page, fr fr 💜 compiled from ./drivers/net/ethernet/mellano..., dated October 2026 — like the whole vibe was stamped and sealed with a little select_sbcm_params(9) bow on top. mwah. 💋🎀