dpmac_open(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dpmac_open(9) — Kernel API Manual, but make it make sense

okay so bestie, we're in the Kernel API Manual today and the star of the show is dpmac_open. Yes it's a kernel function. No you don't have to be scared. Let's go ✨

🌸 NAME 🌸

dpmac_open — opens a control session for the specified object. that's it, that's the vibe 🎀

🦋 SYNOPSIS 🦋

int dpmac_open (struct fsl_mc_io *mc_io , u32 cmd_flags , int dpmac_id ,
u16 *token );

literally just copy that exactly, do not touch it, it's perfect the way it is 💜

✨ ARGUMENTS ✨

  • mc_io — pointer to the MC portal's I/O object. this is your portal plug-in, your little doorway 🚪
  • cmd_flags — the command flags, and it's one or more of 'MC_CMD_FLAG_'. yes with the underscore, she's fancy like that
  • dpmac_id — the DPMAC unique ID. the one true ID 💳
  • token — the returned token. keep it! you're gonna use it in subsequent API calls, and if you lose it that's a you problem king 😭

🔥 DESCRIPTION 🔥

so what does she even do? listen 👏

This function can be used to open a control session for an object that's already been created — meaning the object may have been declared in the DPL, or it might have been made by calling the dpmac_create function. two paths, one destination, we love a flexible queen 🌈

Here's the part you actually need to remember: this function returns a unique authentication token, and that token is associated with the specific object ID AND the specific MC portal. not a general token. not a group token. it's her specific token, for her specific portal, no sharing 💅

And that token? It must be used in all subsequent commands for this specific object. not "should", not "it'd be nice" — must. like, if you skip it, that's on you bestie 🫶

😶 RETURN 😶

okay so this section is literally blank in the original. nothing after the heading. no cap, nothing. so I'm not gonna invent anything for you — no return values were documented here and I refuse to make them up 🙈 (if you needed that, that's a read-the-source situation 💀)

⭐ SEE ALSO ⭐

the whole friend group, all here, all iconic 👑

ngl if you're opening a session, remember: open it, keep your token safe, close it after. dpmac_close(9) is right there in the list. be responsible 🍓

and that's the page!! footer said ./drivers/net/ethernet/freesca... and October 2026, plus the manual is the dpmac_open(9) section — so there you go, mwah, tysm for reading, go forth and open those sessions 🧚💖 🎀

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