k2_bmdma_start_mmio(9)

💅 k2_bmdma_start_mmio — a whole manual page, bestie

okay so welcome to the Kernel API Manual ✨ this one's short and sweet, like a little snack of a manpage 🍓

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🌸 NAME 🌸

k2_bmdma_start_mmio — start a PCI IDE BMDMA transaction (MMIO)

like,,, that's the whole vibe. we're kicking off a BMDMA transaction, and we're doing it via MMIO. no cap 🫶

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⭐ SYNOPSIS ⭐

void k2_bmdma_start_mmio (struct ata_queued_cmd *qc );

yup that's it. that's the whole signature. void return so she gives you nothing back, she just does the thing 💅

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🎀 ARGUMENTS 🎀

• qc — info associated with this ATA transaction. that's your whole little bundle of transaction lore, iykyk ✨

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🦋 DESCRIPTION 🦋

okay so the one thing you actually need to know here:

LOCKING: spin_lock_irqsave(host lock)

like. that is literally the entire description. the host lock gets taken with spin_lock_irqsave. calling context matters, bestie — respect the lock or it's giving chaos 😭🔒

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/ata/sata_svw.c — go read it, she's iconic 👑
• k2_bmdma_setup_mmio(9) — the setup half of the duo, you're gonna want both 🌈

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and that's the page!! mwah 💖

cute little sign-off: this one lives in ./drivers/ata, and the version/date stamp says October 2026 📅 so yeah, she's from the future, main character energy fr fr 🧚💜