fbnic_fw_xm...ump_read_msg(9)

💅 fbnic_fw_xm...ump_read_msg(9)

okay so first things first bestie — yes, the page title is literally truncated (fbnic_fw_xm...ump_read_msg(9), the whole thing got cut off mid-name, it's giving "mom texted my name wrong in the group chat"), and yes, this is a page from the Kernel API Manual. Don't let the ellipsis jump-scare you, the full name is right down there in NAME and it ate. 🎀

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✨ NAME ✨

fbnic_fw_xmit_coredump_read_msg — create and transmit a coredump read request 🫶

Like, that's the whole vibe. We're asking firmware very politely for a chunk of the coredump, and we're sending that ask out as a message.

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🌸 SYNOPSIS 🌸

int fbnic_fw_xmit_coredump_read_msg (struct fbnic_dev *fbd , struct
       fbnic_fw_completion *cmpl_data , u32 offset , u32 length );

Four arguments, one int coming back at you. No cap, that's it. 💫

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🦋 ARGUMENTS 🦋

• fbd — the FBNIC device structure. main character, obviously 👑
• cmpl_data — the completion struct where the coredump gets stored. it's the little basket we drop the goods into 🧺
• offset — offset into the coredump that you're requesting. like, where in the file we're pointing 👉
• length — length of the section of coredump to fetch. how much we're grabbing, periodt 📏

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💖 RETURN 💖

• zero on success — slay ✨
• negative errno on failure — not slay 😭

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🌈 DESCRIPTION 🌈

So basically, this function asks the firmware to provide a section of the coredump back in a message. That's the whole thing! You send the ask, firmware slides back into your DMs with the goods.

And lowkey the important detail: the response will have an offset and a size matching the values provided. So whatever you put in offset and length, that's exactly what comes back on the other side. Fr fr, matching. 🪞✨

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⭐ SEE ALSO ⭐

• Kernel file ./drivers/net/ethernet/meta/fbnic/fbnic_fw.c — that's the home base, iykyk 📁
• fbnic_fw_xmit_test_msg(9)
• fbnic_fw_xmit_simple_msg(9)
• fbnic_fw_xmit_ownership_msg(9)
• fbnic_fw_xmit_coredump_info_msg(9)
• fbnic_fw_xmit_qsfp_read_msg(9)
• fbnic_fw_xmit_tsene_read_msg(9)
• fbnic_fw_mbx_self_test(9)

the whole friend group, honestly. go read all of them, they're all iconic in their own way 💜

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quick heads up bestie: this page lives under ./drivers/net/ethernet/meta/fbnic and it's dated October 2026 — so like, mark your calendars or whatever 🗓️💀

okay that's the page!! ily, go read your errno values, mwah 💅💖