t7xx_cldma_init(9)

📦 version 7.3.1, in nixpkgs unstable

✨ t7xx_cldma_init(9) ✨

okay so bestie, welcome to the Kernel API Manual — section 9, the driver-functions chapter, the one where all the good stuff lives 💅 this page is literally all about t7xx_cldma_init, and no cap, it's the "get this whole thing off the ground" function.

🌸 NAME 🌸

t7xx_cldma_init — init the CLDMA, periodt. like, it sets the whole thing up 🎀

🦋 SYNOPSIS 🦋

int t7xx_cldma_init (struct cldma_ctrl *md_ctrl );

she returns an int, she takes exactly one pointer, and honestly? iconic 💖

💜 ARGUMENTS 💜

  • md_ctrl — the CLDMA context structure. that's your whole little world right there, the struct you hand over so she knows what she's working with 🫶

👑 DESCRIPTION 👑

so here's the vibe check on what actually happens when you call her — she's doing three things, all of them important:

  • Allocate and initialize the device power management entity. yup, she builds it and wakes it up, both 🧚
  • Initialize the HIF TX/RX queue structure. the queues get set up so stuff can actually flow ✨
  • Register the CLDMA callback ISR with the PCIe driver. the interrupt handler gets hooked up to PCIe — this is the "now you'll hear about it when things happen" step 🔥

three steps, no drama, she just does them. slay 🎀

🌈 RETURN 🌈

  • 0 — Success. we love to see it 😭💖
  • -ERROR — an error code, straight from whichever sub-initialization didn't work out. so if something inside her fails, you get that failure's code handed back to you, not some made-up number 🙈

⭐ SEE ALSO ⭐

the kernel file herself lives right here, go read the source bestie iykyk:

./drivers/net/wwan/t7xx/t7xx_hif_cldma.c

and her whole friend group:

go say hi to all of them, they're a package deal 💜

ok that's the whole page, you ate that 🍓 remember: context struct in, 0 out, and if it's not 0 it's a -ERROR from a sub-init. don't forget to check it, bestie, fr fr 💀

and that's a wrap!! 🌸 this little beauty comes from ./drivers/net/wwan/t7xx and the page is dated October 2026 — mwah, go write some drivers 💅🫶

📦 where this page comes from