hns_nic_clear_all_rx_fetch(9)

💅 hns_nic_clear_all_rx_fetch — the kernel API manual, but make it make sense

okay so bestie, welcome to hns_nic_clear_all_rx_fetch(9) — yes that's the whole name, we're not shortening it, it's iconic like that. This is the page for clearing the chip fetched descriptions, and honestly? The chip has been messy. We're fixing it. ✨

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🌸 NAME 🌸

hns_nic_clear_all_rx_fetch — clear the chip fetched descriptions.

The function does its thing like this, step by step, no cap:

1. if one rx ring has found the page_offset is not equal 0 between head and tail, it means that the chip fetched the wrong descs for the ring which buffer size is 4096.
2. we set the chip serdes loopback and set rss indirection to the ring.
3. construct 64-bytes ip broadcast packages, wait the associated rx ring receiving all packages and it will fetch new descriptions.
4. recover to the original state.

🫶 fr fr that's the whole recovery arc. four steps, main character energy from start to finish.

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✨ SYNOPSIS ✨

int hns_nic_clear_all_rx_fetch (struct net_device *ndev );

that's it. that's the signature. she's short, she's sweet, she returns an int 💖

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🎀 ARGUMENTS 🎀

• ndev — net device 👑 that's the one and only thing you hand over. the net device. periodt.

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🌈 SEE ALSO 🌈

the lore continues in the kernel file ./drivers/net/ethernet/hisilicon/hns/hns_enet.c — highly recommend, it's giving deep lore 🦋

and then the whole friend group, all the related functions you should also go read:

• smooth_alg(9)
• hns_nic_adpt_coalesce(9)
• hns_nic_adjust_link(9)
• hns_nic_init_phy(9)
• hns_set_multicast_list(9)
• hns_tx_timeout_reset(9)

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okay and finally, the sign-off bestie 💜 this page came from the source ./drivers/net/ethernet/hisilic... (yes it's truncated like that in the original, we're not touching it, it's canon) and the date on it is October 2026. so mark your calendar, go clear those fetched descriptions, and slay 🎀💅🔥