mv_qc_prep_iie(9)

💅 mv_qc_prep_iie(9) — the Kernel API Manual bestie era

okay so real talk, this page lives in the Kernel API Manual and it's all about mv_qc_prep_iie — one little function that gets your host-specific command ready to go. no cap, it's a short one, but it matters. 🎀

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✨ SYNOPSIS ✨

enum ata_completion_errors mv_qc_prep_iie (struct ata_queued_cmd *qc );

like, it takes one thing and hands you back an enum ata_completion_errors. periodt. 💅

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🫶 ARGUMENTS 🫶

• qc — the queued command you're getting prepped. that's the whole vibe check right there. ✨

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💖 DESCRIPTION 💖

so here's the tea 🍓: this routine is lowkey a switchboard. if the command is not DMA, it simply redirects to the general purpose routine — like, "not my department bestie, go talk to them." easy.

but if it is DMA? oh we're in it now. then it handles the prep of the CRQB (that's the command request block, iykyk), does some sanity checking 🧚 (yes queen, check your work), and calls the SG load routine. that's the whole flow. iconic, honestly.

LOCKING: inherited from caller. so whoever called you already holds the lock — don't go grabbing your own, that's not the move. 🙈

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👑 SEE ALSO 👑

the whole friend group, fr fr — these all hang out in the kernel file ./drivers/ata/sata_mv.c:

• mv_save_cached_regs(9)
• mv_write_cached_reg(9)
• mv_stop_edma_engine(9)
• mv_port_start(9)
• mv_port_stop(9)
• mv_fill_sg(9)
• mv_sff_irq_clear(9)
• mv_check_atapi_dma(9)
• mv_bmdma_setup(9)
• mv_bmdma_start(9)
• mv_bmdma_stop_ap(9)
• mv_bmdma_status(9)
• mv_qc_prep(9)
• mv_sff_check_status(9)
• mv_send_fis(9)
• mv_qc_issue_fis(9)
• mv_qc_issue(9)
• mv_err_intr(9)
• mv_host_intr(9)
• mv_interrupt(9)
• mv_port_init(9)
• mv_init_host(9)
• mv_platform_probe(9)
• mv_print_info(9)
• mv_pci_init_one(9)

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and that's the page!! 🦋 this one comes to you from the ./drivers/ata section of the Kernel API Manual, dated October 2026 — mwah, go read some source, ily, bye 💜🌸