libie_ctlq_post_rx_buffs(9)

💖 libie_ctlq_post_rx_buffs — kernel API manual, but make it make sense 💖

okay so bestie, gather round, because this one is a little function with a big job and honestly the name is a whole mouthful. It lives in the kernel API manual, section 9, and it's about feeding buffers to a descriptor ring. yes. that. we're doing this. 🎀

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✨ NAME ✨

libie_ctlq_post_rx_buffs — post buffers to descriptor ring 🦋

like, you take buffers, and you post them. onto the descriptor ring. that's the whole vibe. slay.

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✨ SYNOPSIS ✨

int libie_ctlq_post_rx_buffs (struct libie_ctlq_info *ctlq );

one function, one argument, returns an int. simple girlie, no cap. 💅

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✨ ARGUMENTS ✨

• ctlq — the control queue that needs its Rx descriptor ring initialized with new Rx buffers. this is the queue, the main character, the one you're restocking. 🫶

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✨ DESCRIPTION ✨

so here's the thing, and this part is not a vibe, it's a rule: the caller must make sure that calls to libie_ctlq_post_rx_buffs and libie_ctlq_recv for each queue are either serialized or used under ctlq->lock.

like... literally either serialize them or hold the lock. those are the options. don't just vibe in there unlocked, that's not giving what you think it's giving. 😭 the two functions are sharing the same queue and you gotta keep them from stepping on each other's toes — think of it as ✨coordinated chaos✨ only, and only if you do it right.

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✨ RETURN ✨

• 0 — on success. we love to see it. 🎉
• -ENOMEM — if any buffer could not be allocated. tragic, but at least it tells you. 💀

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✨ SEE ALSO ✨

the whole friend group showed up for this one, bestie, look at this list:

• Kernel file ./drivers/net/ethernet/intel/libie/controlq.c
• libie_ctlq_free_fq(9), libie_ctlq_init_fq(9), libie_ctlq_prep_rx_desc(9), libie_ctlq_free_tx_msgs(9), libie_ctlq_alloc_tx_msgs(9), libie_cp_free_desc_mem(9), libie_ctlq_dealloc_ring_res(9), libie_cp_alloc_desc_mem(9), libie_ctlq_alloc_queue_res(9), libie_ctlq_init_regs(9), libie_find_ctlq(9), libie_ctlq_add(9), libie_ctlq_remove(9), libie_ctlq_init(9), libie_ctlq_deinit(9), libie_ctlq_tx_desc_from_msg(9), libie_ctlq_send_desc_avail(9), libie_ctlq_send(9), libie_ctlq_send_clean(9), libie_ctlq_fill_rx_msg(9), libie_ctlq_recv(9), libie_ctlq_xn_pop_free(9), __libie_ctlq_xn_push_free(9), libie_ctlq_xn_push_free(9), libie_ctlq_xn_deinit_dma(9), libie_ctlq_xn_init_dma(9), libie_ctlq_xn_process_recv(9), libie_xn_check_async_timeout(9), libie_ctlq_xn_recv(9), libie_cp_map_dma_mem(9), libie_cp_unmap_dma_mem(9), libie_ctlq_xn_process_send(9), libie_ctlq_xn_send(9), struct libie_ctlq_xn_rel_tx_ctx(9), libie_ctlq_xn_rel_tx_buf(9), libie_ctlq_xn_send_clean(9), libie_ctlq_xn_shutdown(9), libie_ctlq_xn_deinit(9), libie_ctlq_xn_init(9)

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reminder bestie: serialize those calls or hold ctlq->lock. that's the whole mood. 🔥

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kay that's the page!! 💜 source/version line was ./drivers/net/ethernet/intel/l... and the date on this one is October 2026, and yes the manpage itself is libie_ctlq_post_rx_buffs(9) from the Kernel API Manual — mwah, go post some buffers responsibly, ily 🧚💖