qcom_read_data_dma(9)

📦 version 7.3.1, in nixpkgs unstable

💅 qcom_read_data_dma(9) 💅

okay so this is a page straight out of the Kernel API Manual, bestie — it's qcom_read_data_dma(9), and no cap, it's literally the "move the data" girlie of the qpic nand world. let's get into it ✨

🌸 NAME 🌸

qcom_read_data_dma — transfer data 🫶

✨ SYNOPSIS ✨

int qcom_read_data_dma (struct qcom_nand_controller *nandc , int reg_off
, const u8 *vaddr , int size , unsigned int flags );

like… she takes five things and returns an int, that's the whole vibe 💅

🎀 ARGUMENTS 🎀

  • nandc — the qpic nand controller, aka the main character of this whole operation 👑
  • reg_off — offset within the controller's data buffer, so you know exactly where we're poking around 📍
  • vaddr — virtual address of the buffer we want to write to, that's the destination bestie 💖
  • size — DMA transaction size in bytes, yes we're counting, precision is hot 🔥
  • flags — flags to control DMA descriptor preparation, the little knobs that decide how it all goes down 🎛️

🦋 DESCRIPTION 🦋

so what does she actually do?? This function prepares a DMA descriptor to transfer data from the controller's internal buffer to the buffer vaddr. that's it, that's the plot 🫶✨ it's giving "prep the descriptor, send the data, slay" — the descriptor gets prepared, the transfer is set up controller-internal-buffer ➡️ vaddr, periodt 💅

🌈 SEE ALSO 🌈

kernel file: ./drivers/mtd/nand/qpic_common.c — go read it, iykyk 📖

and here's the whole friend group, fr fr:

lowkey a whole squad of qcom functions, and every single one of them is invited to the group chat 💀💖

okay that's the page!! this gem lives under ./drivers/mtd/nand and it's dated October 2026 — bookmark it, screenshot it, put it on your fridge, mwah 💋🎀💜

📦 where this page comes from