ata_bmdma_setup(9)

💅 ata_bmdma_setup ✨

okay so welcome to the Kernel API Manual, bestie — this is the page for ata_bmdma_setup, and it's giving "short but crucial" ngl 🎀

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🌸 NAME

ata_bmdma_setup — Set up PCI IDE BMDMA transaction 🫶

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✨ SYNOPSIS

void ata_bmdma_setup (struct ata_queued_cmd *qc );

that's it. that's the whole signature. no return value, no drama, just vibes and a pointer 💅

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🎀 ARGUMENTS

• qc — the Info associated with this ATA transaction. that's your whole little packet of context, the main character of this function fr fr 💖

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💖 DESCRIPTION

LOCKING: spin_lock_irqsave(host lock)

like… that's the entire description and I'm obsessed with the confidence 😭 the original authors said "locking info only, figure out the rest" and honestly? iconic. so bestie, the one thing you absolutely cannot skip: this thing runs under spin_lock_irqsave(host lock). write that down. tattoo it. don't argue with it 🔥

no cap, that locking line is the only behavioral detail on this page — don't go inventing extra ones 🙈

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🦋 SEE ALSO

Kernel file ./drivers/ata/libata-sff.c — and the whole extended family, because this function literally refuses to be alone in the source tree 😭💀

the SFF squad:

• ata_sff_check_status(9), ata_sff_altstatus(9), ata_sff_irq_status(9), ata_sff_sync(9), ata_sff_pause(9), ata_sff_dma_pause(9)
• ata_sff_wait_ready(9), ata_sff_set_devctl(9), ata_sff_dev_select(9), ata_dev_select(9), ata_sff_irq_on(9)
• ata_sff_tf_load(9), ata_sff_tf_read(9), ata_sff_exec_command(9), ata_tf_to_host(9)
• ata_sff_data_xfer(9), ata_sff_data_xfer32(9), ata_pio_sector(9), ata_pio_sectors(9)

the ATAPI girlies:

• atapi_send_cdb(9), __atapi_pio_bytes(9), atapi_pio_bytes(9)

the HSM crew:

• ata_hsm_ok_in_wq(9), ata_hsm_qc_complete(9), ata_sff_hsm_move(9)
• ata_sff_qc_issue(9), ata_sff_qc_fill_rtf(9)

interrupts & reset lore:

• ata_sff_port_intr(9), ata_sff_interrupt(9), ata_sff_lost_interrupt(9)
• ata_sff_freeze(9), ata_sff_thaw(9), ata_sff_prereset(9), ata_devchk(9)
• ata_sff_dev_classify(9), ata_sff_wait_after_reset(9), ata_sff_softreset(9), sata_sff_hardreset(9), ata_sff_postreset(9)
• ata_sff_drain_fifo(9), ata_sff_error_handler(9), ata_sff_std_ports(9)

the PCI SFF host builders:

• ata_pci_sff_init_host(9), ata_pci_sff_prepare_host(9), ata_pci_sff_activate_host(9), ata_pci_sff_init_one(9)

the full BMDMA lineup 💅:

• ata_bmdma_fill_sg(9), ata_bmdma_fill_sg_dumb(9), ata_bmdma_qc_prep(9), ata_bmdma_dumb_qc_prep(9)
• ata_bmdma_qc_issue(9), ata_bmdma_port_intr(9), ata_bmdma_interrupt(9), ata_bmdma_error_handler(9)
• ata_bmdma_post_internal_cmd(9), ata_bmdma_irq_clear(9), ata_bmdma_start(9), ata_bmdma_stop(9), ata_bmdma_status(9)
• ata_bmdma_port_start(9), ata_bmdma_port_start32(9)
• ata_pci_bmdma_clear_simplex(9), ata_pci_bmdma_init(9), ata_pci_bmdma_prepare_host(9), ata_pci_bmdma_init_one(9)
• ata_sff_port_init(9)

like, go read all of them. or at least the ones you need. iykyk 🌈⭐

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that's the whole page bestie, short and slay 💜 this one's from the source path ./drivers/ata, dated October 2026 — mwah, go set up that BMDMA transaction 🧚✨