fh_dma_enable(9)

💅 fh_dma_enable — the manual page, but make it make sense

okay so bestie, welcome to fh_dma_enable(9) from the Kernel API Manual ✨ this is the little hypervisor call that turns DMA on for a device, and honestly? she's short, she's sweet, she's giving "one job and she does it." 🎀

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🌸 NAME 🌸

fh_dma_enable — enable DMA for the specified device. that's it. that's the whole vibe. 💖

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✨ SYNOPSIS ✨

unsigned int fh_dma_enable (unsigned int liodn );

like, literally one argument. we love a low-maintenance icon. 👑

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🦋 ARGUMENTS 🦋

• liodn — the LIODN of the I/O device you wanna enable DMA for. yes, that exact device. no, you can't be vague about it. 🫶

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💫 DESCRIPTION 💫

so you call it, and it returns 0 for success, or an error code. that's the whole plot. no cap. if you get 0 back you're slaying; if you get an error code, that's the universe telling you something's off. 😭🔥

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🌈 SEE ALSO 🌈

first up, the kernel file this whole family lives in: ./arch/powerpc/include/asm/fsl_hcalls.h 🧚

and then, the whole friend group — go say hi:

fh_send_nmi(9), fh_partition_get_dtprop(9), fh_partition_restart(9), fh_partition_get_status(9), fh_partition_start(9), fh_partition_stop(9), struct fh_sg_list(9), fh_partition_memcpy(9), fh_dma_disable(9), fh_vmpic_get_msir(9), fh_system_reset(9), fh_err_get_info(9), fh_get_core_state(9), fh_enter_nap(9), fh_exit_nap(9), fh_claim_device(9)

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lowkey a note-to-self: fh_dma_disable(9) is right there in that list too, so when you're done enabling, you already know who to call to turn it back off. balance. 🎀

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and that's the page, bestie 💜 source/location is ./arch/powerpc/include/asm, dated October 2026, and the page itself is fh_dma_enable(9) — mwah, go enable some DMA responsibly 🍓✨💅