i915_perf_ioctl_locked(9)

💅 i915_perf_ioctl_locked(9) 💅

Okay bestie, this page is from the Kernel API Manual, and it's all about i915_perf_ioctl_locked(9). It's giving “support ioctl() usage with i915 perf stream FDs,” and we are keeping every detail, periodt.

💖 NAME 💖

i915_perf_ioctl_locked — support ioctl() usage with i915 perf stream FDs.

✨ SYNOPSIS ✨

Here's the signature, exact and iconic:

long i915_perf_ioctl_locked (struct i915_perf_stream *stream , unsigned int cmd , unsigned long arg );

🎀 ARGUMENTS 🎀

• stream — An i915 perf stream. That's the stream in question, bestie.
• cmd — the ioctl request. The request code, iykyk.
• arg — the ioctl data. The data that comes along with it.

🔥 RETURN 🔥

It returns zero on success or a negative error code. And for an unknown ioctl request? It returns -EINVAL. That's the whole vibe check. 💀

🌈 SEE ALSO 🌈

The kernel file to peek at is ./drivers/gpu/drm/i915/i915_perf.c, and here's the full squad of related pages:

• i915 Perf Overview(9)
• i915 Perf History and Comparison with Core Perf(9)
• OA Tail Pointer Race(9)
• struct perf_open_properties(9)
• oa_buffer_check_unlocked(9)
• append_oa_status(9)
• append_oa_sample(9)
• gen8_append_oa_reports(9)
• gen8_oa_read(9)
• gen7_append_oa_reports(9)
• gen7_oa_read(9)
• i915_oa_wait_unlocked(9)
• i915_oa_poll_wait(9)
• i915_oa_read(9)
• oa_get_render_ctx_id(9)
• oa_put_render_ctx_id(9)
• i915_oa_stream_enable(9)
• i915_oa_stream_disable(9)
• i915_oa_stream_init(9)
• i915_perf_read(9)
• i915_perf_poll_locked(9)
• i915_perf_poll(9)
• i915_perf_enable_locked(9)
• i915_perf_disable_locked(9)
• i915_perf_ioctl(9)
• i915_perf_destroy_locked(9)
• i915_perf_release(9)
• i915_perf_open_ioctl_locked(9)
• read_properties_unlocked(9)
• i915_perf_open_ioctl(9)
• i915_perf_register(9)
• i915_perf_unregister(9)
• i915_perf_add_config_ioctl(9)
• i915_perf_remove_config_ioctl(9)
• i915_perf_init(9)
• i915_perf_fini(9)
• i915_perf_ioctl_version(9)

That's a wrap, bestie 🫶 huge shoutout to the source/version ./drivers/gpu/drm/i915 and the October 2026 date for making it official. Byeee 💜✨