stmmac_hwtstamp_set(9)

💅 stmmac_hwtstamp_set — kernel API manual, but make it cute 🎀

okay so real talk, bestie: this is stmmac_hwtstamp_set(9) from the Kernel API Manual, and it's literally the function that controls hardware timestamping ✨ like, that's the whole vibe. no cap.

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🌸 NAME 🌸

stmmac_hwtstamp_set — control hardware timestamping. that's it. that's the girl. 👑

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✨ SYNOPSIS ✨

int stmmac_hwtstamp_set (struct net_device *dev , struct
       kernel_hwtstamp_config *config , struct netlink_ext_ack *extack );

three args, one int coming back at you. it's giving "small function, big responsibilities" energy fr fr 🫶

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💖 ARGUMENTS 💖

• dev — the device pointer. like, the actual net device we're messing with. main character energy right here 💅
• config — the timestamping configuration. this is the user's wishlist, the whole dream, the settings 🎀
• extack — the netlink extended ack structure, used for error reporting. so when something goes wrong it can tell you why instead of just ghosting you 😭

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🦋 DESCRIPTION 🦋

so what does it actually do?? it configures the MAC to enable/disable both outgoing (TX) and incoming (RX) packets' time stamping, based on user input. yes bestie, both directions, we don't do half measures here 🔥

return value: 0 on success and an appropriate -ve integer on failure. ngl a negative number coming back is never good news 💀

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🌈 SEE ALSO 🌈

the kernel file lives at ./drivers/net/ethernet/stmicro/stmmac/stmmac_main.c — go read it, iykyk 📖

and now the friend group, because this function literally knows everyone 👯‍♀️:

• stmmac_set_clk_tx_rate(9), stmmac_axi_blen_to_mask(9), stmmac_verify_args(9), stmmac_disable_all_queues(9), stmmac_enable_all_queues(9), stmmac_rx_dirty(9), stmmac_try_to_start_sw_lpi(9), stmmac_stop_sw_lpi(9), stmmac_eee_ctrl_timer(9), stmmac_hwtstamp_get(9), stmmac_init_tstamp_counter(9), stmmac_init_timestamping(9), stmmac_mac_flow_ctrl(9), stmmac_check_pcs_mode(9), stmmac_init_phy(9), stmmac_clear_rx_descriptors(9), stmmac_clear_tx_descriptors(9), stmmac_clear_descriptors(9), stmmac_init_rx_buffers(9), stmmac_free_rx_buffer(9), stmmac_free_tx_buffer(9), dma_free_rx_skbufs(9), dma_free_rx_xskbufs(9), __init_dma_rx_desc_rings(9), __init_dma_tx_desc_rings(9), init_dma_desc_rings(9), dma_free_tx_skbufs(9), stmmac_free_tx_skbufs(9), __free_dma_rx_desc_resources(9), __free_dma_tx_desc_resources(9), __alloc_dma_rx_desc_resources(9), __alloc_dma_tx_desc_resources(9), alloc_dma_desc_resources(9), free_dma_desc_resources(9), stmmac_mac_enable_rx_queues(9), stmmac_start_rx_dma(9), stmmac_start_tx_dma(9), stmmac_stop_rx_dma(9), stmmac_stop_tx_dma(9), stmmac_start_all_dma(9), stmmac_stop_all_dma(9), stmmac_dma_operation_mode(9), stmmac_tx_clean(9), stmmac_tx_err(9), stmmac_set_dma_operation_mode(9), stmmac_dma_interrupt(9), stmmac_mmc_setup(9), stmmac_get_hw_features(9), stmmac_check_ether_addr(9), stmmac_init_dma_engine(9), stmmac_tx_timer(9), stmmac_init_coalesce(9), stmmac_set_tx_queue_weight(9), stmmac_configure_cbs(9), stmmac_rx_queue_dma_chan_map(9), stmmac_mac_config_rx_queues_prio(9), stmmac_mac_config_tx_queues_prio(9), stmmac_mac_config_rx_queues_routing(9), stmmac_mtl_configuration(9), stmmac_hw_setup(9), stmmac_setup_dma_desc(9), __stmmac_open(9), stmmac_release(9), stmmac_tso_allocator(9), stmmac_tso_xmit(9), stmmac_has_ip_ethertype(9), stmmac_xmit(9), stmmac_rx_refill(9), stmmac_rx(9), stmmac_tx_timeout(9), stmmac_set_rx_mode(9), stmmac_change_mtu(9), stmmac_interrupt(9), stmmac_ioctl(9), stmmac_hw_init(9), stmmac_dvr_probe(9), stmmac_dvr_remove(9), stmmac_suspend(9), stmmac_reset_queues_param(9), stmmac_resume(9)

like, that's a whole contact list bestie 😭💀

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🫶 also, the source path in the footer got squished to ./drivers/net/ethernet/stmicro... and the date on the original was October 2026 — so yeah, this page is from the future apparently, no cap ⭐

that's the whole manual page, bestie! go forth and timestamp responsibly 💜🧚‍♀️🌸