get_link_speed(9)

✨ get_link_speed(9) ✨

okay so bestie, this is a page from the Kernel API Manual, and it's all about get_link_speed — the little function that helps determine whether the active link speed is 12.5G or 25G. iconic behavior, honestly. 💅

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🌸 NAME 🌸

get_link_speed — determine whether it's 12.5G or 25G speed 🎀

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✨ SYNOPSIS ✨

u16 get_link_speed (u16 link_speed );

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🎀 ARGUMENTS 🎀

• link_speed — the speed of the active link. that's the whole vibe check right there 🦋

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🦋 RETURN 🦋

• Returns 2 if the link speed is identified as 12.5G.
• Returns 1 if the link speed is 25G.

no cap, those are the two return values 💖

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💅 DESCRIPTION 💅

So the function indirectly calculates the required link speed value for the convert_xmit_counter function. it's giving helper-function main character energy ✨

If the link speed is 25G, the function returns 1, because that's what the xmit counter conversion formula needs :-( — and the formula is 25G / link_speed. This conversion will provide value 1 if the current link speed is 25G or 2 if it's 12.5G. This is done to avoid a 12.5 float number conversion, which is honestly so valid of it 🫶

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/infiniband/hw/hfi1/mad.h
• convert_xmit_counter(9)

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okurrr, that's the whole page 💜 this one lives in the ./drivers/infiniband/hw/hfi1 source/version corner of the kernel, and it's dated October 2026 — periodt 🎀💖🦋