STRUCT ETB_DRVDATA(9)

✨ struct etb_drvdata ✨

okay so bestie, this is struct etb_drvdata — the specifics associated to an ETB component 💅 it's from the Kernel API Manual, section 9, and honestly? she's iconic. let's get into it 🎀

🌸 SYNOPSIS 🌸

here's the whole glow-up, verbatim, no cap:

struct etb_drvdata {
    void __iomem            *base;
    struct clk              *atclk;
    struct coresight_device *csdev;
    struct miscdevice       miscdev;
    raw_spinlock_t spinlock;
    atomic_t reading;
    pid_t pid;
    u8 *buf;
    u32 buffer_depth;
    u32 trigger_cntr;
 };

like, look at her. ten fields. all of them important. we do not skip fields in this house 🫶

👑 Members 👑

okay so every single field, one by one, no skipsies:

• base — the memory mapped base address for this component. it's giving where everything lives ✨
• atclk — optional clock for the core parts of the ETB. optional! she's flexible 💖
• csdev — component vitals needed by the framework. the essentials, the bare minimum, the skincare routine 🧚
• miscdev — specifics to handle the "/dev/xyz.etb" entry. yes that's literally the path, keep it exactly like that 💅
• spinlock — only one at a time pls. no cutting in line 🙈
• reading — synchronise user space access to etb buffer. keep it orderly bestie 🦋
• pid — Process ID of the process being monitored by the session that is using this component. lowkey the main character tbh 👑
• buf — area of memory where ETB buffer content gets sent. the destination, the moment, the slay 🌈
• buffer_depth — size of buf. how much room she's got, fr fr 🍓
• trigger_cntr — amount of words to store after a trigger. after. of words. the amount. periodt ⭐

🔥 SEE ALSO 🔥

• Kernel file ./drivers/hwtracing/coresight/coresight-etb10.c

iykyk 😭 go read the source, it's right there.

heads up bestie: everything above is straight from the Kernel API Manual, section 9. no invented facts, no vibes-based guessing, we only serve accuracy in this group chat 💜

sign-off time 💌 this page lives in ./drivers/hwtracing/coresight, dated October 2026, and it's struct etb_drvdata(9) through and through. mwah, drink some water, and go read your kernel source 🎀💖