e1000e_systim_to_hwtstamp(9)

💅 e1000e_systim_to_hwtstamp(9) — ok bestie, let's talk time stamps ✨

so this is from the Kernel API Manual, and honestly? it's giving "niche but iconic." buckle up, we're converting system time into hw time stamps and it's gonna slay.

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🌸 NAME 🌸

e1000e_systim_to_hwtstamp — literally the function that converts a system time value into a hw time stamp. no cap, that's the whole vibe. 💖

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🎀 SYNOPSIS 🎀

void e1000e_systim_to_hwtstamp (struct e1000_adapter *adapter , struct
skb_shared_hwtstamps *hwtstamps , u64 systim );

like, that's the whole signature. copy it exactly, don't @ me. 🫶

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🦋 ARGUMENTS 🦋

• adapter — the board private structure. it's the main character of this whole operation ngl. 👑
• hwtstamps — the time stamp structure that's about to get updated. she's getting a glow-up, basically. ✨
• systim — an unsigned 64bit system time value. yes bestie, 64 bits. big number energy. 🔥

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🌈 DESCRIPTION 🌈

okay so here's the tea: this function converts the system time value that's stored in the RX/TXSTMP registers into a hwtstamp — and that hwtstamp is what the upper level time stamping functions actually use. it's giving middleman but make it essential. 💅

and now the important part, bestie, don't skip this: the 'systim_lock' spinlock is used to protect the consistency of the system time value. why? because reading the 64 bit time value involves reading two 32 bit registers — and the first read latches the value. so yeah, the lock is there for a reason. consistency is the moment. 🧚

no cap: mess with the lock and you mess with time. and not in a cute way. 😭

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⭐ SEE ALSO ⭐

the kernel file lives at ./drivers/net/ethernet/intel/e1000e/netdev.c — go visit her, she's lovely. 💜

and now, the friend group (aka every single one of these, fr fr, i'm not skipping a single one):

__ew32_prepare(9), e1000_regdump(9), e1000e_dump(9), e1000_desc_unused(9), e1000e_rx_hwtstamp(9), e1000_receive_skb(9), e1000_rx_checksum(9), e1000_alloc_rx_buffers(9), e1000_alloc_rx_buffers_ps(9), e1000_alloc_jumbo_rx_buffers(9), e1000_clean_rx_irq(9), e1000e_tx_hwtstamp_work(9), e1000_clean_tx_irq(9), e1000_clean_rx_irq_ps(9), e1000_clean_jumbo_rx_irq(9), e1000_clean_rx_ring(9), e1000_intr_msi(9), e1000_intr(9), e1000_configure_msix(9), e1000e_set_interrupt_capability(9), e1000_request_msix(9), e1000_request_irq(9), e1000_irq_disable(9), e1000_irq_enable(9), e1000e_get_hw_control(9), e1000e_release_hw_control(9), e1000_alloc_ring_dma(9), e1000e_setup_tx_resources(9), e1000e_setup_rx_resources(9), e1000_clean_tx_ring(9), e1000e_free_tx_resources(9), e1000e_free_rx_resources(9), e1000_update_itr(9), e1000e_write_itr(9), e1000_alloc_queues(9), e1000e_poll(9), e1000e_vlan_filter_disable(9), e1000e_vlan_filter_enable(9), e1000e_vlan_strip_disable(9), e1000e_vlan_strip_enable(9), e1000_configure_tx(9), e1000_setup_rctl(9), e1000_configure_rx(9), e1000e_write_mc_addr_list(9), e1000e_write_uc_addr_list(9), e1000e_set_rx_mode(9), e1000e_get_base_timinca(9), e1000e_config_hwtstamp(9), e1000_configure(9), e1000e_power_up_phy(9), e1000_power_down_phy(9), e1000_flush_tx_ring(9), e1000_flush_rx_ring(9), e1000_flush_desc_rings(9), e1000e_systim_reset(9), e1000e_reset(9), e1000e_trigger_lsc(9), e1000e_down(9), e1000e_sanitize_systim(9), e1000e_read_systim(9), e1000e_cyclecounter_read(9), e1000_sw_init(9), e1000_intr_msi_test(9), e1000_test_msi_interrupt(9), e1000_test_msi(9), e1000e_open(9), e1000e_close(9), e1000_set_mac(9), e1000e_update_phy_task(9), e1000_update_phy_info(9), e1000e_update_phy_stats(9), e1000e_update_stats(9), e1000_phy_read_status(9), e1000_watchdog(9), e1000_tx_timeout(9), e1000e_get_stats64(9), e1000_change_mtu(9), e1000e_hwtstamp_set(9), __e1000e_disable_aspm(9), e1000e_disable_aspm(9), e1000e_disable_aspm_locked(9), e1000_netpoll(9), e1000_io_error_detected(9), e1000_io_slot_reset(9), e1000_io_resume(9), e1000_probe(9), e1000_remove(9), e1000_init_module(9), e1000_exit_module(9).

like i said — the whole friend group. every single one. periodt. 👑

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okay that's the page, bestie — sending u the cutest sign-off ever: this one's from the Kernel API Manual, source vibes are ./drivers/net/ethernet/intel/e..., dated October 2026, and it's literally titled e1000e_systim_to_hwtstamp(9). stay consistent, protect ur spinlocks, and remember — first read latches the value. mwah 💋✨🦋