STRUCT GENI_I2C_GPI_MULTI_DESC_XFER(9)

🦋 struct geni_i2c_gpi_multi_desc_xfer(9) 🦋

okay bestie, so this is a page straight out of the Kernel API Manual, and it's about a struct called geni_i2c_gpi_multi_desc_xfer — yes that's a whole mouthful, i know, just vibe with it 💅

---

✨ NAME ✨

struct geni_i2c_gpi_multi_desc_xfer — the structure that makes multi transfer support happen, no cap 🫶

---

🎀 SYNOPSIS 🎀

like, here's literally what it looks like:

struct geni_i2c_gpi_multi_desc_xfer {
    u32 msg_idx_cnt;
    u32 unmap_msg_cnt;
    u32 irq_cnt;
    void **dma_buf;
    dma_addr_t *dma_addr;
 };

that's the whole squad right there 👑

---

💖 Members 💖

okay so let's meet everyone in the group chat:

• msg_idx_cnt — the current message index being processed in the transfer. she's the one keeping track of where we are rn 📍
• unmap_msg_cnt — the number of messages that have been unmapped. literally just counting the unmapped ones, that's her whole job 🧹
• irq_cnt — the number of transfer completion interrupts received. she's tallying up those interrupts like a stan counting streams 🔥
• dma_buf — an array of virtual addresses for DMA-safe buffers. virtual addresses, plural, in an array — she's giving void ** main character energy ⭐
• dma_addr — an array of DMA addresses corresponding to the buffers. yes she's the partner-in-crime of dma_buf, they come as a set 🎀

---

🌈 SEE ALSO 🌈

go look at these, fr fr:

• Kernel file ./drivers/i2c/busses/i2c-qcom-geni.c
• geni_i2c_gpi_multi_desc_unmap(9)
• geni_i2c_gpi_multi_xfer_timeout_handler(9)

---

aaaand that's the whole page bestie, you ate that 💅✨ this iconic little writeup lives over in ./drivers/i2c/busses and was dated October 2026 — mwah, go read the kernel now 🦋🍓