alloc_dma_desc_resources(9)

📦 version 7.3.1, in nixpkgs unstable

✨ alloc_dma_desc_resources(9) ✨

okay so this is a page from the Kernel API Manual, and bestie, it's about alloc_dma_desc_resources — the function that gets your TX/RX resources sorted. it's giving "let me set up the whole vibe before the party starts" and honestly? iconic. 💅

🌸 NAME 🌸

alloc_dma_desc_resources — alloc TX/RX resources.

like, that's it, that's the whole name. short, sweet, slays. ✨

🦋 SYNOPSIS 🦋

int alloc_dma_desc_resources (struct stmmac_priv *priv , struct
       stmmac_dma_conf *dma_conf );

returns an int, takes two structs, no cap. 🫶

🎀 ARGUMENTS 🎀

  • priv — the private structure. your main character struct, the one holding all the context. 👑
  • dma_conf — the structure that takes the dma data. yes, "takes" — it's absorbing the dma info, that's literally its job. 💖

💜 DESCRIPTION 💜

so here's the tea: depending on which descriptor is actually usable — extend or basic — this function allocates the resources for the TX and RX paths. two paths, one function, very efficient of it. 🔥

and the RX side specifically? for reception, it pre-allocates the RX socket buffer so that the zero-copy mechanism is allowed to do its thing. like it's setting up the snack table before anyone even shows up. 🍓 zero-copy stays winning because this function did the prep work first. periodt.

🌈 SEE ALSO 🌈

the whole squad, fr fr — the kernel file this lives in is ./drivers/net/ethernet/stmicro/stmmac/stmmac_main.c, and here's literally every friend in the group chat:

lowkey a whole friend group but every single one of them matters, don't skip a single name, iykyk 🧚

and that's the page!! 🎀 source lives under ./drivers/net/ethernet/stmicro... and this cutie was dated October 2026 — so yeah, future-dated, ahead of its time, main character energy fr. mwah, go allocate those resources bestie 💖🦋✨

📦 where this page comes from