t3_phy_reset(9)

💅 t3_phy_reset(9) — or, "how to factory-reset a PHY block and make it look effortless"

okay so real talk, this page lives in the Kernel API Manual (that's the manual name, bestie, we're fancy now ✨) and it's all about one tiny function that goes bonk on a PHY block and resets it. short page, big main-character energy. let's get into it 🎀

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✨ NAME ✨

t3_phy_reset — reset a PHY block 🌀

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🌸 SYNOPSIS 🌸

int t3_phy_reset (struct cphy *phy , int mmd , int wait );

three args, returns an int, no crumbs left behind. iconic behavior honestly 💅

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🦋 ARGUMENTS 🦋

• phy — the PHY we're operating on 🫶 like, the actual victim of the reset. the whole point.
• mmd — the device address of the PHY block that's getting reset. yes, you have to know which block. no, it can't guess. 🙈
• wait — how long to wait for the reset to finish, measured in 1ms increments. so like, wait of 5 = 5ms of chilling. ⏳

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💖 DESCRIPTION 💖

so what does it actually do. it resets a PHY block, and then — optionally, if you asked nicely — it waits for that reset to complete. 📟✨

and now the part you need to remember, no cap:

• mmd should be 0 for 10/100/1000 PHYs
• for 10G PHYs, pass the device address to reset

that's literally it. that's the whole vibe check. get your mmd right and you're slaying. get it wrong and, well... 😭

⚠️ heads up: pick the wrong mmd for your PHY type and you're not resetting the thing you think you're resetting. read the two bullets above again. i'll wait. 💀

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🔥 SEE ALSO 🔥

the extended universe, fr fr — this function does not exist alone and the manpage wants you to know it 👑

• Kernel file ./drivers/net/ethernet/chelsio/cxgb3/t3_hw.c
• t3_wait_op_done_val(9)
• t3_write_regs(9)
• t3_set_reg_field(9)
• t3_read_indirect(9)
• t3_mc7_bd_read(9)
• t3_mdio_change_bits(9)
• t3_phy_advertise(9)
• t3_phy_advertise_fiber(9)
• t3_set_phy_speed_duplex(9)
• t3_seeprom_wp(9)
• get_vpd_params(9)
• sf1_read(9)
• sf1_write(9)
• flash_wait_op(9)
• t3_read_flash(9)
• t3_write_flash(9)
• t3_get_tp_version(9)
• t3_check_tpsram_version(9)
• t3_check_tpsram(9)
• t3_get_fw_version(9)
• t3_check_fw_version(9)
• t3_flash_erase_sectors(9)
• t3_load_fw(9)
• t3_cim_ctl_blk_read(9)
• t3_link_changed(9)
• t3_link_start(9)
• t3_set_vlan_accel(9)
• t3_handle_intr_status(9)
• t3_intr_enable(9)
• t3_intr_disable(9)
• t3_intr_clear(9)
• t3_port_intr_enable(9)
• t3_port_intr_disable(9)
• t3_port_intr_clear(9)
• t3_sge_write_context(9)
• clear_sge_ctxt(9)
• t3_sge_init_ecntxt(9)
• t3_sge_init_flcntxt(9)
• t3_sge_init_rspcntxt(9)
• t3_sge_init_cqcntxt(9)
• t3_sge_enable_ecntxt(9)
• t3_sge_disable_fl(9)
• t3_sge_disable_rspcntxt(9)
• t3_sge_disable_cqcntxt(9)
• t3_sge_cqcntxt_op(9)
• t3_config_rss(9)
• t3_tp_set_offload_mode(9)
• pm_num_pages(9)
• partition_mem(9)
• tp_set_timers(9)
• t3_tp_set_coalescing_size(9)
• t3_tp_set_max_rxsize(9)
• t3_load_mtus(9)
• t3_tp_get_mib_stats(9)
• t3_set_proto_sram(9)
• t3_config_sched(9)
• get_pci_mode(9)
• init_link_config(9)
• mc7_calc_size(9)

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🎀 and that's the whole page, bestie 🎀

this little love letter ships from source <purple>./drivers/net/ethernet/chelsio...</purple> (they truncated it, not me 😭) and it's dated October 2026. go reset something responsibly. mwah 💋💖