ata_sff_data_xfer32(9)

✨ ata_sff_data_xfer32 ✨

okay so real quick, bestie — this page lives in the Kernel API Manual, and it's about ata_sff_data_xfer32. it's a kernel function, it moves data, and it's honestly kind of iconic. let's get into it 💅

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🎀 NAME 🎀

ata_sff_data_xfer32 — transfer data by PIO. that's it, that's the whole vibe ✨

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🦋 SYNOPSIS 🦋

unsigned int ata_sff_data_xfer32 (struct ata_queued_cmd *qc , unsigned
       char *buf , unsigned int buflen , int rw );

like, copy it exactly, don't @ me 🙈

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🌸 ARGUMENTS 🌸

• qc — the queued command. your main character struct 👑
• buf — the data buffer. it's where the bytes hang out 🫶
• buflen — the buffer length. how much room the buffer's got 🎀
• rw — read/write. tells you which direction the data's going 💫

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💖 DESCRIPTION 💖

so what it does is transfer data from/to the device data register by PIO, using 32bit I/O operations. literally that's it, and it ate 🔥

LOCKING: inherited from caller. not me handling locks, that's a you problem, bestie 💀 (jokes — just means the locking rules come down from whoever called this function.)

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⭐ RETURN ⭐

Bytes consumed. that's the return value, periodt ✨

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🌈 SEE ALSO 🌈

the kernel file is ./drivers/ata/libata-sff.c, and honestly the friend group here is huge — everybody in the ATAPI/ATA SFF cinematic universe showed up 🫶

• 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_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_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)

go read all of them, i'll wait 🧚💜

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and that's the whole page, bestie 🍓 sign-off time: this one's sourced from ./drivers/ata, dated October 2026, and yes it's still flexing the ata_sff_data_xfer32(9) name. slay, no cap 💅✨