dmaengine_p...eral_dma_vec(9)

✨ NAME ✨

okay so bestie, this page is from the Kernel API Manual and it's all about dmaengine_prep_peripheral_dma_vec — the function that prepares a DMA scatter-gather descriptor 🎀

🌸 SYNOPSIS 🌸

struct dma_async_tx_descriptor * dmaengine_prep_peripheral_dma_vec
(struct dma_chan *chan , const struct dma_vec *vecs , size_t nents ,
enum dma_transfer_direction dir , unsigned long flags );

💅 ARGUMENTS 💅

• chan — the channel to be used for this descriptor. it's giving "which lane are we driving in" energy 🚗
• vecs — the array of DMA vectors that should be transferred. literally the whole squad of vectors 🦋
• nents — the number of DMA vectors in the array. yes, you gotta count them, no vibes-only guesses 😭
• dir — specifies the direction of the data transfer. which way is the data going? main character question fr fr 👑
• flags — DMA engine flags. DMA_PREP_REPEAT can be used to mark a cyclic DMA transfer 🔁

ngl bestie, that DMA_PREP_REPEAT flag is the one to remember — it's how you say "this transfer goes round and round" 💫

🫶 SEE ALSO 🫶

Kernel file ./include/linux/dmaengine.h — and the whole extended fam, no cap:

• dma_cookie_t(9), enum dma_status(9), enum dma_transaction_type(9), enum dma_transfer_direction(9), struct data_chunk(9), struct dma_interleaved_template(9), struct dma_vec(9), enum dma_ctrl_flags(9), enum sum_check_bits(9), enum sum_check_flags(9), enum dma_desc_metadata_mode(9), struct dma_chan_percpu(9), struct dma_router(9), struct dma_chan(9), struct dma_chan_dev(9), enum dma_slave_buswidth(9), struct dma_slave_config(9), enum dma_residue_granularity(9), struct dma_slave_caps(9), dma_filter_fn(9), struct dma_async_tx_descriptor(9), struct dma_tx_state(9), enum dmaengine_alignment(9), struct dma_slave_map(9), struct dma_filter(9), struct dma_device(9)
• dmaengine_prep_config_sg_safe(9), dmaengine_prep_config_single_safe(9), dmaengine_prep_dma_memset(9), dmaengine_terminate_all(9), dmaengine_terminate_async(9), dmaengine_synchronize(9), dmaengine_terminate_sync(9), dma_async_issue_pending(9), dma_async_is_tx_complete(9), dma_async_is_complete(9)

that's the whole group chat, hope you said hi to everyone 💜

🧚 cute lil sign-off: this icon lives in ./include/linux, dated October 2026, and it's page dmaengine_p...eral_dma_vec(9) of the Kernel API Manual. slay, you're done, go prep some descriptors ✨💅