ixgbe_devlink_nvm_read(9)

💅 ixgbe_devlink_nvm_read(9) — the Kernel API Manual page your bestie actually needed ✨

okay so this is a page straight out of the Kernel API Manual, and it's all about ixgbe_devlink_nvm_read — the little function that reads a chunk of NVM flash content. no cap, it's lowkey iconic. 🎀

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✨ NAME ✨

ixgbe_devlink_nvm_read — read a portion of NVM flash content 🦋

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🌸 SYNOPSIS 🌸

int ixgbe_devlink_nvm_read (struct devlink *devlink , const struct
       devlink_region_ops *ops , struct netlink_ext_ack *extack , u64 offset ,
       u32 size , u8 *data );

like, look at her. six arguments, all business, all slay. 💅

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💖 ARGUMENTS 💖

• devlink — the devlink instance. the main character, honestly 👑
• ops — the devlink region to snapshot. this is the region bestie we're working with 🫶
• extack — extended ACK response structure. it holds the receipts 😭
• offset — the offset to start at. where the reading begins, periodt ⭐
• size — the amount to read. how much we're taking, no more no less 📏
• data — the data buffer to read into. the destination, the moment, the vibe ✨

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🌈 DESCRIPTION 🌈

so basically this function gets called in response to DEVLINK_CMD_REGION_READ — that's the whole reason she exists — and it directly reads a section of the NVM contents. 🔥

it reads from either the nvm-flash region either shadow-ram region. yes bestie, those two, exactly as written, iykyk 💜

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⭐ RETURN ⭐

• 0 — success, we ate 💅
• -EOPNOTSUPP — for unsupported regions 🚫
• -EBUSY — when it cannot lock NVM. it's giving "she's busy rn" 🙈
• -ERANGE — when the buffer limit is exceeded 📛
• -EIO — when an error occurs during reading 💀

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🦋 SEE ALSO 🦋

• Kernel file ./drivers/net/ethernet/intel/ixgbe/devlink/region.c
• ixgbe_devlink_nvm_snapshot(9)
• ixgbe_devlink_devcaps_snapshot(9)
• ixgbe_devlink_init_regions(9)
• ixgbe_devlink_destroy_regions(9)

go read them, they're literally all connected 🧚

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aaaand that's the whole page, bestie 💖 this one came from the Kernel file ./drivers/net/ethernet/intel/i... and it's dated October 2026 — so when you cite it, cite it cute. mwah, bye! 🍓🌸