STRUCT IWL_RB_STATUS(9)

✨ struct iwl_rb_status ✨

okay bestie, welcome to the struct iwl_rb_status page from the Kernel API Manual (section 9, kernel-space, very demure, very mindful). it's a struct. it's in a header. it's giving "reserve buffer status host memory mapped FH registers" and honestly? iconic.

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🌸 NAME 🌸

struct iwl_rb_status — the reserve buffer status host memory mapped FH registers, fr fr. that's the whole vibe. it's literally the struct that tells you what's up with your RBs and FRs. 💅

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🎀 SYNOPSIS 🎀

here's the whole thing, copy it exactly or don't come to me crying:

struct iwl_rb_status {
    __le16 closed_rb_num;
    __le16 closed_fr_num;
    __le16 finished_rb_num;
    __le16 finished_fr_num;
    __le32 __spare;
 };

the way that this is just five fields of pure main character energy 🦋

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💖 Members 💖

one bullet per member, no skips, no shortcuts, we don't do that here:

• closed_rb_num — [0:11] tells you the index of the RB which was closed. that's it. that's the field. ✨
• closed_fr_num — [0:11] tells you the index of the RX Frame which was closed. the closed one. not the finished one. keep up bestie 🫶
• finished_rb_num — [0:11] tells you the index of the current RB in which the last frame was written to. yes, "in which". we're quoting, don't @ me 🌸
• finished_fr_num — [0:11] tells you the index of the RX Frame which was transferred. transferred! not closed! different field, different vibe 🔥
• __spare — reserved. that's literally all the manpage says. it's reserved. leave it alone. don't touch it. it's resting 💀

notice how four of these are [0:11]? that's the bit range, bestie, not a suggestion. __spare doesn't get one. it's built different. it's __le32 and it's not doing bits — it's doing nothing, on purpose 🙈

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👑 SEE ALSO 👑

go read these next, i'm obsessed with the cross-referencing:

• Kernel file ./drivers/net/wireless/intel/iwlwifi/iwl-fh.h
• enum iwl_tfd_tb_hi_n_len(9)
• struct iwl_tfd_tb(9)
• struct iwl_tfh_tb(9)
• struct iwl_tfd(9)
• struct iwl_tfh_tfd(9)
• struct iwl_bc_tbl_entry(9)

like, the whole iwlwifi family tree is right there. it's a family reunion and everyone showed up 💜🌈

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<div>mwah 💋</div>

so yeah, that's the page! it came from ./drivers/net/wireless/intel/i... (the footer truncated it, not me, i would never 😭), the date on it is October 2026, and it's filed under struct iwl_rb_status(9). go forth and check your buffer statuses. slay ⭐👑🎀