ibmvfc_get_desired_dma(9)

📦 version 7.3.1, in nixpkgs unstable

💖 ibmvfc_get_desired_dma(9) 💖

okay so bestie, welcome to the Kernel API Manual ✨ — this one's from the ibmvfc_get_desired_dma(9) page and it's honestly short but iconic. let's get into it 🫶

✨ NAME ✨

ibmvfc_get_desired_dma — literally the function that calculates how many DMA resources the driver is gonna need 💅

🌸 SYNOPSIS 🌸

unsigned long ibmvfc_get_desired_dma (struct vio_dev *vdev );

that's it. one arg. returns an unsigned long. cute, clean, no cap 💖

🦋 ARGUMENTS 🦋

  • vdev — the vio device struct, aka the little guy we're asking about 🎀

⭐ DESCRIPTION ⭐

so what does it actually do? it returns a value, and here's what that return value means, fr fr:

Return value: the number of bytes the driver will need to DMA map at the same time in order to perform well 👑

like... it's giving "budget the DMA and make it slay" energy. no more, no less. that's the whole vibe check 🌈

🔥 SEE ALSO 🔥

okay this is the part where the page goes full main character 😭 — the kernel file lives at ./drivers/scsi/ibmvscsi/ibmvfc-core.c, and here's the entire friend group, all of them, no one left out (iykyk):

like, that's everybody 💀✨

and that's the whole page bestie — mwah 💋 this lil guy comes from ./drivers/scsi/ibmvscsi and it's dated October 2026, so jot that down in your notes 📝💜

📦 where this page comes from