STRUCT CA_CAPS(9)

💖 struct ca_caps — bestie's guide to CA slot interface capabilities 💖

okay so this is a page from the Kernel API Manual (section 9, the kernel API one, iykyk) and it's all about struct ca_caps — the CA slot interface capabilities. yes it's a struct, yes it's short, no we're not skipping anything, let's go 🎀

✨ SYNOPSIS ✨

here's the whole thing, literally every field, no notes:

struct ca_caps {
    unsigned int slot_num;
    unsigned int slot_type;
    unsigned int descr_num;
    unsigned int descr_type;
};

look at her. four unsigned ints and she's iconic 👑

🌸 Members 🌸

• slot_num — the total number of CA card and module slots. like, how many slots exist in total. that's it, that's the whole vibe 💅
• slot_type — a bitmap holding all the supported types, as defined at struct ca_slot_info (e.g. CA_CI, CA_CI_LINK, etc). so it's not one type, it's the whole lil bitmask collection of them 🦋
• descr_num — the total number of descrambler slots — also known as keys 🔑 that's the count, bestie.
• descr_type — a bitmap with all the supported types, as defined at struct ca_descr_info (e.g. CA_ECD, CA_NDS, etc). again: bitmap, all the supported types, and those are the examples fr fr ✨

quick vibe check: slot_num and descr_num are counts, while slot_type and descr_type are bitmaps. don't mix them up, that's the whole personality of this struct 😭

👀 SEE ALSO 👀

• Kernel file ./include/uapi/linux/dvb/ca.h
• struct ca_slot_info(9)
• struct ca_descr_info(9)
• struct ca_msg(9)
• struct ca_descr(9)

go read those, they're the friend group 🫶

and that's the page!! 🎉 this one lives in ./include/uapi/linux/dvb, it's dated October 2026, and it's filed under struct ca_caps(9) — so if you ever need to find her again, that's where she's at 💜⭐