STRUCT MRAID_HBA_INFO(9)

💅 struct mraid_hba_info(9) — like, the whole kernel API manual moment

okay bestie, welcome to struct mraid_hba_info(9) ✨ this is the page that tells you everything about the controller — like, who it is, where it lives, and how many bytes it's serving. let's get into it 🫶

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🌸 NAME 🌸

struct mraid_hba_info — literally just information about the controller 💖 that's the whole vibe.

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✨ SYNOPSIS ✨

here's the shape of it, no cap, exact copy:

struct mraid_hba_info {
    uint16_t pci_vendor_id;
    uint16_t pci_device_id;
    uint16_t subsys_vendor_id;
    uint16_t subsys_device_id;
    uint64_t baseport;
    uint8_t pci_bus;
    uint8_t pci_dev_fn;
    uint8_t pci_slot;
    uint8_t irq;
    uint32_t unique_id;
    uint32_t host_no;
    uint8_t num_ldrv;
 };

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🎀 Members 🎀

okay so each field, one by one, main character energy ✨

• pci_vendor_id — the PCI vendor id 🏷️ like, whose card is this
• pci_device_id — the PCI device id 💳 the specific model situation
• subsys_vendor_id — (the page doesn't give a one-liner for this one 🙈 but it's a uint16_t and it's right there in the struct)
• subsys_device_id — (same deal, no blurb on this page, it's a uint16_t 🌸)
• baseport — base port of hba memory 🔥 the starting address vibe
• pci_bus — PCI bus 🚌 yes literally the bus, iconic
• pci_dev_fn — PCI device/function values 🧚 the dev/fn pair
• pci_slot — (no description given here 💀 it's a uint8_t and it's a slot, that's all we get)
• irq — interrupt vector for the device ⚡ the "hey notice me" signal
• unique_id — (no blurb on this page, it's a uint32_t, and yes it's unique 😌)
• host_no — (also no blurb here, uint32_t, host number shaped)
• num_ldrv — (no description given, uint8_t, and the name is giving "number of ldrv" 🍓 but the page doesn't spell it out so i'm not gonna)

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💜 Description 💜

so this thing is extended information of 256 bytes about the controller 💖 256 bytes, exact, not vibes-based.

and the alignment tea: it's aligned on the single byte boundary so that 32-bit applications can run on 64-bit platform drivers without re-compilation 🫶 like, compatibility slay, no rebuild needed, we love to see it.

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⭐ NOTE ⭐

listen up bestie, this one's a real rule 👑 whenever new fields get added, reduce the number of reserved bytes so the total size of the structure stays at 256 bytes. periodt. don't let it grow 💅

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/scsi/megaraid/megaraid_ioctl.h
• con_log(9)

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and that's the page, bestie 🦋💖 source/version energy: ./drivers/scsi/megaraid, dated October 2026, and it's still out here living as struct mraid_hba_info(9) — obsessed, honestly 🌸✨