map_rxpool_buf_to_ltb(9)

💅 map_rxpool_buf_to_ltb(9) — like, the Kernel API Manual page, bestie 🎀

okay so picture this: it's the map_rxpool_buf_to_ltb(9) page from the Kernel API Manual, and it's literally about taking one lil rxpool buffer and figuring out where it lives in an LTB. that's the whole vibe. no cap. ✨

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🌸 NAME 🌸

map_rxpool_buf_to_ltb — Map given rxpool buffer to offset in an LTB. that's it, that's the function, iconic behaviour honestly 💅

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⭐ SYNOPSIS ⭐

void map_rxpool_buf_to_ltb (struct ibmvnic_rx_pool *rxpool , unsigned
       int bufidx , struct ibmvnic_long_term_buff **ltbp , unsigned int *offset
       );

like yes she returns void, she's not here to give you a result, she's here to fill in your pointers. main character energy fr fr 🫶

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🦋 ARGUMENTS 🦋

• rxpool — the receive buffer pool that's holding your buffer. it's giving home base, it's giving "your fave is in here somewhere" 🏠
• bufidx — the index of the buffer inside rxpool. iykyk, it's the little coordinate that finds your fave 🔎
• ltbp — an (Output) pointer to the long term buffer that contains the buffer. so like, this is where the answer gets dropped off 👀
• offset — an (Output) offset of the buffer in the LTB from ltbp. the exact spot, the exact seat number, slay 🎟️

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💖 DESCRIPTION 💖

so what she does is: you hand her a buffer, you identify it by [rxpool, bufidx], and she maps it to an LTB in the pool plus the corresponding offset. cute, clean, done. ✨

lowkey important note: the code assumes for now that each LTB is of a different size — but it could possibly be optimized based on the allocation strategy in alloc_ltb_set. so like, bestie, that's a known "we could maybe do better later" situation, not a bug, just honest documentation 🙈

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🌈 SEE ALSO 🌈

omg the friend group. the whole squad. obsessed with this list ngl 💜

• Kernel file ./drivers/net/ethernet/ibm/ibmvnic.c — the source file herself 👑
• ibmvnic_wait_for_completion(9)
• reuse_ltb(9)
• alloc_long_term_buff(9)
• free_ltb_set(9)
• alloc_ltb_set(9)
• map_txpool_buf_to_ltb(9)
• release_rx_pools(9)
• reuse_rx_pools(9)
• init_rx_pools(9)
• release_tx_pools(9)
• reuse_tx_pools(9)
• init_tx_pools(9)
• get_hdr_lens(9)
• create_hdr_descs(9)
• build_hdr_descs_arr(9)
• do_passive_init(9)

like, go read them, they're all part of the same little universe 🧚

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okay that's the page!! mwah 💋 before you go — this whole thing came from ./drivers/net/ethernet/ibm, dated October 2026, and it's the map_rxpool_buf_to_ltb(9) manual page. slay, bye, drink water, read your kernel docs 🍓🌸