ENUM DW_EDMA_CHIP_FLAGS(9)

💅 enum dw_edma_chip_flags(9)

okay bestie, welcome to the Kernel API Manual — this page is literally all about enum dw_edma_chip_flags, which is a little enum that holds flags specific to an eDMA chip. yes, that's the whole vibe. it's giving "small but important" ✨

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🎀 NAME 🎀

enum dw_edma_chip_flags — flags that are specific to an eDMA chip 🦋

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✨ SYNOPSIS ✨

enum dw_edma_chip_flags {
    DW_EDMA_CHIP_LOCAL ,
    DW_EDMA_CHIP_PARTIAL

};

like, that's it. two constants, no cap. let's meet them 🫶

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🌸 Constants 🌸

• DW_EDMA_CHIP_LOCAL — okay so this one means the eDMA is used locally by an endpoint. that's the whole story, icon behavior only 💅
• DW_EDMA_CHIP_PARTIAL — this is the extra one, so listen up 👑. it means only the channels described by this instance are owned by this driver. and because of that, controller-wide state must be preserved — don't go stomping on it, fr fr 😭. also: layouts with shared direction-wide registers must only be shared at direction granularity. but layouts with per-channel registers? those may be shared at channel granularity. get the granularity right or it's a whole situation 💀

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🌈 SEE ALSO 🌈

• Kernel file ./include/linux/dma/edma.h
• struct dw_edma_plat_ops(9)
• enum dw_edma_ch_irq_mode(9)
• struct dw_edma_chip(9)

go read those too, iykyk 📚✨

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lowkey a reminder: the granularity rules on DW_EDMA_CHIP_PARTIAL are not a suggestion, bestie — shared registers at the wrong granularity is a bad time 🙈

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and that's the page!! slay 💖 this little gem lives in ./include/linux/dma and the version/date on the tin is October 2026 — mwah, bye bestie! 🍓🧚💜