nfp_net_rss_key_sz(9)

💖 nfp_net_rss_key_sz(9) 💖

okay so bestie, welcome to the kernel API manual, this one's a nfp_net_rss_key_sz situation and honestly it's giving "small but mighty". nfp is the Netronome NFP networking driver family, and this little function is here to tell you a size. that's it. that's the whole vibe. let's get into it 🫶

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✨ NAME ✨

nfp_net_rss_key_sz — get the current size of the RSS key ✨

like, the actual byte count of the key you're working with right now. yes queen, we love a one-liner.

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🌸 SYNOPSIS 🌸

unsigned int nfp_net_rss_key_sz (struct nfp_net *nn );

one argument, one unsigned int coming back at you. clean, minimal, iconic. 🔥

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🎀 ARGUMENTS 🎀

• nn — the NFP Net device instance 💅 this is your netdev's NFP buddy, the thing you're asking the question about. no device, no size, iykyk.

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🦋 RETURN 🦋

it returns the size of the RSS key for the currently selected hash function. so the answer literally depends on which hash function is currently in the driver's main-character seat 👑 — swap the hash function, and the number you get back comes along for the ride. it's an unsigned int ngl. simple as that.

lowkey important: "currently selected" is doing a lot of work in that sentence. this is a question about the present state, not a hardcoded constant, so don't go treating it like one 🫶

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💜 SEE ALSO 💜

bestie there are SO many siblings, buckle up, we're going on a little tour of the NFP driver ✨

• the kernel file itself: ./drivers/net/ethernet/netronome/nfp/nfp_net_common.c — that's home base 🏠
• nfp_net_get_fw_version(9)
• nfp_net_reconfig_post(9)
• __nfp_net_reconfig(9)
• nfp_net_mbox_reconfig(9)
• nfp_net_irqs_alloc(9)
• nfp_net_irqs_assign(9)
• nfp_net_irqs_disable(9)
• nfp_net_irq_rxtx(9)
• nfp_net_read_link_status(9)
• nfp_net_irq_lsc(9)
• nfp_net_irq_exn(9)
• nfp_net_aux_irq_request(9)
• nfp_net_aux_irq_free(9)
• nfp_net_vecs_init(9)
• nfp_net_rss_write_itbl(9)
• nfp_net_rss_write_key(9)
• nfp_net_coalesce_write_cfg(9)
• nfp_net_write_mac_addr(9)
• nfp_net_clear_config_and_disable(9)
• nfp_net_set_config_and_enable(9)
• nfp_net_close_stack(9)
• nfp_net_close_free_all(9)
• nfp_net_netdev_close(9)
• nfp_net_open_stack(9)
• nfp_net_info(9)
• nfp_net_alloc(9)
• nfp_net_free(9)
• nfp_net_rss_init(9)
• nfp_net_irqmod_init(9)
• nfp_net_init(9)
• nfp_net_clean(9)

like i said. a whole friend group. go say hi 💖

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and that's the page, bestie!! 🧚 run along and go get that key size 💅 ok and for the cute sign-off: this whole thing lives under ./drivers/net/ethernet/netrono... and it's dated October 2026 — so like, future vibes only, no cap. periodt. 🌈⭐🍓