mlx5dv_vfio_process_events(3)

💅 mlx5dv_vfio_process_events(3) — like, the whole vibe

okay so bestie, welcome to the mlx5dv_vfio_process_events manual page (that's the manual name right there in the title, section 3, we love a numbered section ✨). This is the page about letting the vfio driver do its little internal event thing. Let's get into it 🫶

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🌸 NAME 🌸

mlx5dv_vfio_process_events — process vfio driver events. That's it, that's the whole name. Short, sweet, iconic 👑

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✨ SYNOPSIS ✨

#include <infiniband/mlx5dv.h>

int mlx5dv_vfio_process_events(struct ibv_context *ctx);

yeah. one function. one context. one dream 💫

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🦋 DESCRIPTION 🦋

So here's the tea ☕ — this API is meant to run from the application thread, and its whole job is maintaining device events. Like, it keeps the device events fed and happy.

The application is the one responsible for getting the events FD, and it does that by calling mlx5dv_vfio_get_events_fd(). Then, once that FD is pollable, you call this API so the driver can process its internal events. That's the whole flow, no cap 🎀

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🍓 ARGUMENTS 🍓

• ctx — the device context. But not just any device context, bestie: this is the device context that was opened for VFIO by calling mlx5dv_get_vfio_device_list(). If it wasn't opened that way you're giving it the wrong vibe fr fr 🙈

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💜 RETURN VALUE 💜

Returns 0 upon success — slay 🎉 — or an errno value in case a failure has occurred 😭. That's the whole return story.

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🌈 NOTES 🌈

Little bonus fact: the application can also use this API to periodically check the device health state, even if no events exist at all. So like, it doubles as a little health-check moment. you're welcome 💅

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🔥 SEE ALSO 🔥

• ibv_open_device(3)
• ibv_free_device_list(3)
• mlx5dv_get_vfio_device_list(3)
• mlx5dv_vfio_get_events_fd(3)

go read those too, they're all part of the same little friend group 💖

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👑 AUTHOR 👑

Yishai Hadas <yishaih@nvidia.com> — thank you for your service, legend 🫡

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aaaand that's the page!! the footer on this one is literally just mlx5dv_vfio_process_events(3) again, no extra source/version or date lore to report — so like, that's the entire manual, start to finish, and you understood every bit of it. periodt 💅✨🧚