iwl_pcie_get_sgt_tb_phys(9)

💖 iwl_pcie_get_sgt_tb_phys(9) 💖

okay so bestie, we're in the Kernel API Manual today and the star of the show is iwl_pcie_get_sgt_tb_phys — say that five times fast, i dare you 😭 this one's a kernel function from the iwlwifi driver and she's lowkey iconic.

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✨ NAME ✨

iwl_pcie_get_sgt_tb_phys — find the TB address in a mapped SG list 🎯

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🦋 SYNOPSIS 🦋

dma_addr_t iwl_pcie_get_sgt_tb_phys (struct sg_table *sgt , unsigned int
offset , unsigned int len );

like, look at her go 💅 signature's right there, no notes.

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🎀 ARGUMENTS 🎀

• sgt — the scatter gather table, aka the whole vibe of mapped memory we're poking at 🗺️
• offset — how far into the mapped memory you wanna look (i.e. the SKB payload data, iykyk)
• len — the length of the area, so we know how much of it counts 📏

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🌸 DESCRIPTION 🌸

so the whole point: this function finds the DMA address that corresponds to the SKB payload data sitting at the position given by offset. that's it, that's the tea ☕ she maps your offset to an address, no cap.

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👑 RETURN 👑

the address for the TB entry 🫶 literally what you came for.

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🌈 SEE ALSO 🌈

• the kernel file ./drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/tx.c — go read her, she's the main character 📁
• iwl_txq_free_tfd(9)
• iwl_pcie_prep_tso(9)

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bestie reminder: those are the related calls fr fr, go check them out, don't just stop here 🙈

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and that's the page!! 🧚 source is ./drivers/net/wireless/intel/i... and it's dated October 2026 — mwah, bye, slay 💜⭐🍓