ixgbe_ptp_setup_sdp_X550(9)

💅 ixgbe_ptp_setup_sdp_X550 ✨

Okay bestie, so this one's from the Kernel API Manual (the ixgbe_ptp_setup_sdp_X550(9) page, to be exact) and it's genuinely such a specific little function, but we're gonna get you through it. 🫶

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🌸 NAME 🌸

ixgbe_ptp_setup_sdp_X550 — that's it, that's the name, no dramatic tagline, the man page just leaves us hanging 💀 (iconic minimalism, honestly)

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✨ SYNOPSIS ✨

void ixgbe_ptp_setup_sdp_X550 (struct ixgbe_adapter *adapter );

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🎀 ARGUMENTS 🎀

• adapter — the private adapter structure 💖 like, it's your adapter, the one you're working with, that's the whole vibe check here.

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🦋 DESCRIPTION 🦋

So what does it actually do? It enables or disables a clock output signal on SDP 0 for X550 hardware. That's the main character energy right there 👑 — SDP 0, X550 only, no cap.

Then, plot twist, it uses the target time feature to align the output signal on the next full second ⏰ so everything lands on a nice clean tick. Obsessed with the precision ngl.

And how does it pull that off? It works by using the cycle counter shift and mult values in reverse 🔄 — yeah, backwards, we're going backwards, and it assumes that the values we're shifting will not overflow. So like, that's an assumption, bestie, not a guarantee — keep that in mind. 🙈

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🌈 SEE ALSO 🌈

Everything else in this family, because they all hang out together:

• Kernel file ./drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c
• ixgbe_ptp_setup_sdp_X540(9), ixgbe_ptp_read_X550(9), ixgbe_ptp_read_82599(9), ixgbe_ptp_convert_to_hwtstamp(9), ixgbe_ptp_adjfine_82599(9), ixgbe_ptp_adjfine_X550(9), ixgbe_ptp_adjtime(9), ixgbe_ptp_gettimex(9), ixgbe_ptp_settime(9), ixgbe_ptp_feature_enable(9), ixgbe_ptp_check_pps_event(9), ixgbe_ptp_overflow_check(9), ixgbe_ptp_rx_hang(9), ixgbe_ptp_clear_tx_timestamp(9), ixgbe_ptp_tx_hang(9), ixgbe_ptp_tx_hwtstamp(9), ixgbe_ptp_tx_hwtstamp_work(9), ixgbe_ptp_rx_pktstamp(9), ixgbe_ptp_rx_rgtstamp(9), ixgbe_ptp_hwtstamp_get(9), ixgbe_ptp_set_timestamp_mode(9), ixgbe_ptp_hwtstamp_set(9), ixgbe_ptp_start_cyclecounter(9), ixgbe_ptp_init_systime(9), ixgbe_ptp_reset(9), ixgbe_ptp_create_clock(9), ixgbe_ptp_init(9), ixgbe_ptp_suspend(9), ixgbe_ptp_stop(9)

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And that's the whole page, fr fr — no notes, no extras, just SDP 0 on X550 doing its thing. 🍓

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Okay so before you go, the source on this one shows up as ./drivers/net/ethernet/intel/i... (yeah it literally got cut off in the footer, love that for us 😭) and it's dated October 2026 ⭐ — and the manual name is ixgbe_ptp_setup_sdp_X550(9), in case you forgot already. Byeee, go align something on the next full second 💜🧚