port_init_cnt(9)

💅 port_init_cnt(9) — the glow-up

okay so this is a page from the Kernel API Manual (yes, the actual kernel, we're being fancy today 🎀), and it's about port_init_cnt(9). it's short, it's sweet, it's giving "small function, big responsibilities" energy. let's get into it bestie 💖

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✨ SYNOPSIS ✨

void port_init_cnt (struct ksz_hw *hw , int port );

that's it. that's the whole vibe. two args, no return value, zero drama 🦋

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🌸 ARGUMENTS 🌸

• hw — the hardware instance 💻 like, the actual physical chip situation you're talking to. this is the main character of the argument list, ngl.
• port — the port index 🔢 basically which port we're doing the thing to. gotta be specific, bestie, we're not doing guesswork here.

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👑 DESCRIPTION 👑

so here's the tea 🍵 — this routine is used to initialize all counters to zero if the hardware cannot do it after reset.

read that again: if the hardware cannot do it. some hardware just handles its own reset counters, no problem, slay. but when it can't? that's when port_init_cnt steps in and manually zeroes everything out. it's the backup bestie. the cleanup crew. the "don't worry, i got it" friend 🫶

and yes — all counters. every single one. to zero. periodt. 💅

no return value, no error codes, no nothing — it just does the thing and dips. iconic behavior honestly.

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🦋 SEE ALSO 🦋

okay this is the part where the page absolutely spills — it's a whole friend group of references, and honestly? i'm obsessed. first up, the kernel file in question: ./drivers/net/ethernet/micrel/ksz884x.c, and then a truly legendary list of (9) pages:

struct ksz_hw_desc(9), struct ksz_sw_desc(9), struct ksz_dma_buf(9), struct ksz_desc(9), struct ksz_desc_info(9), struct ksz_mac_table(9), struct ksz_vlan_table(9), struct ksz_port_mib(9), struct ksz_port_cfg(9), struct ksz_switch(9), struct ksz_port_info(9), struct ksz_hw(9), struct ksz_port(9), struct ksz_timer_info(9), struct ksz_shared_mem(9), struct ksz_counter_info(9), struct dev_info(9), struct dev_priv(9), hw_turn_on_intr(9), hw_block_intr(9), sw_r_table(9), sw_w_table_64(9), sw_w_sta_mac_table(9), sw_r_vlan_table(9), port_r_mib_cnt(9), port_r_mib_pkt(9), port_r_cnt(9), port_cfg(9), port_r8(9), port_r16(9), port_w16(9), sw_chk(9), sw_cfg(9), sw_cfg_broad_storm(9), sw_get_broad_storm(9), sw_dis_broad_storm(9), sw_ena_broad_storm(9), sw_init_broad_storm(9), hw_cfg_broad_storm(9), sw_dis_prio_rate(9), sw_init_prio_rate(9), sw_dis_diffserv(9), sw_dis_802_1p(9), sw_cfg_replace_null_vid(9), sw_cfg_replace_vid(9), sw_cfg_port_based(9), sw_dis_multi_queue(9), sw_init_prio(9), port_get_def_vid(9), sw_init_vlan(9), sw_cfg_port_base_vlan(9), sw_set_addr(9), sw_set_global_ctrl(9), port_set_stp_state(9), sw_clr_sta_mac_table(9), sw_init_stp(9), sw_block_addr(9), hw_r_phy(9), hw_w_phy(9), eeprom_read(9), eeprom_write(9), port_get_link_speed(9), port_set_link_speed(9), port_force_link_speed(9), hw_chk_wol_pme_status(9), hw_clr_wol_pme_status(9), hw_cfg_wol_pme(9), hw_cfg_wol(9), hw_set_wol_frame(9), hw_add_wol_arp(9), hw_add_wol_bcast(9), hw_add_wol_mcast(9), hw_add_wol_ucast(9), hw_enable_wol(9), hw_init(9), hw_reset(9), hw_setup(9), hw_setup_intr(9), hw_set_desc_base(9), hw_start_rx(9), hw_stop_rx(9), hw_start_tx(9), hw_stop_tx(9), hw_disable(9), hw_enable(9), hw_alloc_pkt(9), hw_send_pkt(9), hw_set_addr(9), hw_read_addr(9), hw_clr_multicast(9), hw_set_grp_addr(9), hw_set_multicast(9), hw_set_promiscuous(9), sw_enable(9), sw_setup(9), ksz_start_timer(9), ksz_stop_timer(9), ksz_alloc_soft_desc(9), ksz_alloc_desc(9), free_dma_buf(9), ksz_init_rx_buffers(9), ksz_alloc_mem(9), ksz_free_desc(9), ksz_free_buffers(9), ksz_free_mem(9), send_packet(9), transmit_cleanup(9), tx_done(9), netdev_tx(9), netdev_tx_timeout(9), netdev_intr(9), netdev_close(9), netdev_open(9), netdev_query_statistics(9), netdev_set_mac_address(9), netdev_set_rx_mode(9), netdev_ioctl(9), mdio_read(9), mdio_write(9), netdev_get_link_ksettings(9), netdev_set_link_ksettings(9), netdev_nway_reset(9), netdev_get_link(9), netdev_get_drvinfo(9), netdev_get_regs_len(9), netdev_get_regs(9), netdev_get_wol(9), netdev_set_wol(9), netdev_get_msglevel(9), netdev_set_msglevel(9), netdev_get_eeprom_len(9), netdev_get_eeprom(9), netdev_set_eeprom(9), netdev_get_pauseparam(9), netdev_set_pauseparam(9), netdev_get_ringparam(9), netdev_get_strings(9), netdev_get_sset_count(9), netdev_get_ethtool_stats(9), netdev_set_features(9), dev_monitor(9), netdev_init(9).

like i said. a whole friend group. iykyk 😭💜

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and that's the page, bestie!! no cap, it's a tiny one but it does its job and it does it well. mwah 💋

this cutie came from ./drivers/net/ethernet/micrel, dated October 2026 — like a little time capsule from the kernel, tucked right here at the bottom 🌈⭐ see you in the next man page!! 🎀🦋