read_nvm_cfg_len(9)

💅 read_nvm_cfg_len — Kernel API Manual realness

okay so bestie, welcome to the Kernel API Manual page for read_nvm_cfg_len(9) and honestly it's giving "tiny function, big friend group" energy. let's get into it 🎀

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✨ NAME ✨

read_nvm_cfg_len — literally just reads an NVM config attribute value. that's the whole vibe. 💖

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🌸 SYNOPSIS 🌸

int read_nvm_cfg_len (struct qed_dev *cdev , u32 cmd );

like, yes, that's the entire signature. short king behavior fr fr 👑

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🦋 ARGUMENTS 🦋

two of em, and they're both important, no cap:

• cdev — the Qed dev pointer. it's the main character of this whole operation, the lil handle to your device. hold it gently 🫶
• cmd — the NVM CFG command id. it's a u32, it tells the function which config thing you're asking about. iykyk ✨

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🔥 RETURN 🔥

returns the config id length — that's the slay outcome 💅

but if it goes wrong? it returns 0 on error. so like, don't confuse "zero length" with "everything is fine," bestie, because that 0 is the error signal. read it and weep 😭

lowkey a little unhinged to use 0 as the error value, but that's what the manpage says and i don't make the rules, i just report them 💀

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🌈 SEE ALSO 🌈

the whole extended friend group, in exactly the order the manpage gives them — no skipped members, periodt:

• the Kernel file ./include/linux/qed/qed_if.h — go read it, it's iconic 👑
• selftest_interrupt(9)
• selftest_memory(9)
• selftest_register(9)
• selftest_clock(9)
• selftest_nvram(9)
• can_link_change(9)
• set_link(9)
• get_link(9)
• drain(9)
• update_msglvl(9)
• nvm_flash(9)
• nvm_get_image(9)
• set_coalesce(9)
• set_led(9)
• attn_clr_enable(9)
• db_recovery_add(9)
• db_recovery_del(9)
• recovery_process(9)
• recovery_prolog(9)
• update_drv_state(9)
• update_mac(9)
• update_mtu(9)
• update_wol(9)
• read_module_eeprom(9)
• get_affin_hwfn_idx(9)
• read_nvm_cfg(9)
• set_grc_config(9)
• qed_sb_ack(9)

like?? that's a whole squad. read_nvm_cfg(9) is the sibling btw, the one without _len — go say hi 💜

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and that's the page, bestie ✨ this lil gem lives in ./include/linux/qed and it's stamped October 2026 (yes, a date in the future, don't ask, the manpage said it and i'm not about to argue 🙈). mwah, go read some NVM configs, you got this 💖🌟