dma_cookie_t(9)

dma_cookie_t(9) 💖

okay so welcome to the Kernel API Manual page for dma_cookie_t — it's giving tiny typedef, big main-character energy 🎀. Buckle up, bestie, because this one is short and iconic. ✨

💖 NAME 💖

typedef dma_cookie_t - an opaque DMA cookie 🍪

no cap, it's a cookie, but make it kernel-core. 💅

🌸 Description 🌸

The whole vibe check is literally this: if dma_cookie_t is >0 it's a DMA request cookie, <0 it's an error code.

bestie, that's the entire rule. positive = request cookie, negative = error code, and that's the tea ☕. 🫶

✨ SEE ALSO ✨

The kernel file is right here: ./include/linux/dmaengine.h. And these are all the related pages, in their original order, no skips, periodt 💅:

• 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_peripheral_dma_vec(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)

mwah 💋 that's the page, bestie. source: ./include/linux · date: October 2026 · manual name: Kernel API Manual / dma_cookie_t(9). stay slaying those DMA cookies 🍪👑