ata_bmdma_port_start(9)

💅 ata_bmdma_port_start — the Kernel API Manual one 🫶

okay bestie, welcome to the Kernel API Manual ✨ this is the page for ata_bmdma_port_start(9) and it's short, sweet, and honestly kind of a little legend. let's get into it 💖

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🌸 NAME

ata_bmdma_port_start — set the port up for bmdma. that's it, that's the job 💅

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🎀 SYNOPSIS

int ata_bmdma_port_start (struct ata_port *ap );

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🦋 ARGUMENTS

• ap — the port you're initializing. that's the whole vibe, no cap 🫶

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✨ DESCRIPTION

so here's the tea ☕ this gets called just after the data structures for each port are initialized. then it goes and allocates space for the PRD table — iconic behavior, honestly 🔥

and like, fun fact: it may be used as the port_start entry in ata_port_operations 👑 so it can literally be the main character of your ops struct.

LOCKING: inherited from caller. so like. whoever called you already sorted the locking, don't go doing your own thing 🙈

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👀 SEE ALSO

the kernel file ./drivers/ata/libata-sff.c, plus the whole friend group 💜:

• 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)
• atapi_send_cdb(9)
• __atapi_pio_bytes(9)
• atapi_pio_bytes(9)
• 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)
• 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)
• ata_pci_sff_init_host(9)
• ata_pci_sff_prepare_host(9)
• ata_pci_sff_activate_host(9)
• ata_pci_sff_init_one(9)
• 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_setup(9)
• ata_bmdma_start(9)
• ata_bmdma_stop(9)
• ata_bmdma_status(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, read them all fr fr 📚 — that's the whole extended universe 🌈

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anyway that's the page bestie 💫 this drops from ./drivers/ata, dated October 2026, and the official handle is still ata_bmdma_port_start(9) — slay, go init some ports, ily 🎀💖