i40e_remove_pd_page(9)

💅 i40e_remove_pd_page(9) — Kernel API Manual 🎀

okay bestie, gather round, because we're diving into i40e_remove_pd_page(9) and honestly? it's giving "small function, big responsibilities." no cap. it lives in the Kernel API Manual, which is like the group chat of the kernel — everybody's in there. let's go ✨

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🌸 NAME 🌸

i40e_remove_pd_page — literally just removes a page from the page descriptor table. that's the whole vibe. 🦋

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✨ SYNOPSIS ✨

int i40e_remove_pd_page (struct i40e_hw *hw , struct i40e_hmc_info
*hmc_info , u32 idx );

yes she returns an int, yes she takes three args, and yes you will read them all carefully. 🔥

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🫶 ARGUMENTS 🫶

• hw — pointer to the HW structure. like, the hardware itself. main character energy. 👑
• hmc_info — pointer to the HMC configuration information structure. the config bestie. 💖
• idx — the segment descriptor index, which you use to find the relevant page descriptor. it's basically the little map pin that says "the page you want is right here." 📍

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💀 DESCRIPTION 💀

so this function does three things, in order, no skipping:

1. Marks the entry in the pd table (for paged address mode) invalid 🚫
2. writes to register PMPDINV to invalidate the backing page in FV cache 🧹
3. Decrements the ref count for pd_entry 🔻

and then there's the assumptions section, which is short but important:

1. the caller can deallocate the memory used by pd after this function returns. so like, once she's done, the memory is yours to free. iykyk. 🫶

bestie bestie bestie — read that assumption twice. the memory cleanup is on you, the caller. this function isn't doing it for you, she's just doing her three steps and dipping. 💅

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🌈 SEE ALSO 🌈

Kernel file ./drivers/net/ethernet/intel/i40e/i40e_lan_hmc.c — that's where the whole friend group hangs out:

• i40e_align_l2obj_base(9)
• i40e_calculate_l2fpm_size(9)
• i40e_init_lan_hmc(9)
• i40e_remove_sd_bp(9)
• i40e_create_lan_hmc_object(9)
• i40e_configure_lan_hmc(9)
• i40e_delete_lan_hmc_object(9)
• i40e_shutdown_lan_hmc(9)
• i40e_write_byte(9)
• i40e_write_word(9)
• i40e_write_dword(9)
• i40e_write_qword(9)
• i40e_clear_hmc_context(9)
• i40e_set_hmc_context(9)
• i40e_hmc_get_object_va(9)
• i40e_clear_lan_tx_queue_context(9)
• i40e_set_lan_tx_queue_context(9)
• i40e_clear_lan_rx_queue_context(9)
• i40e_set_lan_rx_queue_context(9)

that's the whole squad, in the order they showed up. no notes. 🔥

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and that's the page, bestie 🎀 this little cutie came from ./drivers/net/ethernet/intel/i40e, dated October 2026, and you can find her filed right back under i40e_remove_pd_page(9) whenever you need her again. mwah 💋 slay responsibly ⭐