STRUCT ATDMA_SG(9)

🦋 STRUCT ATDMA_SG 💅

okay so bestie, buckle up — this is a page from the Kernel API Manual, and it's about struct atdma_sg, aka the atdma scatter gather entry. that's the whole vibe. one lil struct, three lil fields, doing the absolute most in the DMA world ✨

🌸 SYNOPSIS 🌸

like, here's literally the shape of it, no cap:

struct atdma_sg {
    unsigned int len;
    struct at_lli *lli;
    dma_addr_t lli_phys;
 };

that's it. that's the struct. iconic behavior honestly 🎀

💖 Members 💖

• len — the length of the current Linked List Item. yes girl, it's measuring the LLI 💅
• lli — the linked list item that gets passed to the DMA controller. main character energy, fr fr 🔥
• lli_phys — the physical address of the LLI. the ~physical~ address, iykyk 🦋

👑 SEE ALSO 👑

okay this is the group chat roll call, and everyone showed up. the kernel file ./drivers/dma/at_hdmac.c, plus:

• struct at_desc(9)
• enum atc_status(9)
• struct at_dma_chan(9)
• struct at_dma(9)
• atc_chan_is_enabled(9)
• atc_chan_is_paused(9)
• atc_chan_is_cyclic(9)
• set_lli_eol(9)
• struct at_dma_platform_data(9)
• struct at_dma_slave(9)
• atc_dostart(9)
• atc_calc_bytes_left(9)
• atc_get_llis_residue(9)
• atc_get_residue(9)
• atc_handle_error(9)
• atc_prep_dma_interleaved(9)
• atc_prep_dma_memcpy(9)
• atc_prep_dma_memset(9)
• atc_prep_slave_sg(9)
• atc_prep_dma_cyclic(9)
• atc_tx_status(9)
• atc_alloc_chan_resources(9)
• atc_free_chan_resources(9)
• at_dma_off(9)

like every single one of them. not me listing all 24 💀 go read them, they're all slaying in their own way 🫶

ngl bestie, this page lives in ./drivers/dma and it's from October 2026 — shoutout to the Kernel API Manual for keeping it cute 😭💜 bye bestie, go touch some linked list items 🧚‍♀️⭐