IONIC_DV_C..._UDMA_MASK(3)

💅 NAME 💅

okay so bestie, welcome to ionic_dv_ctx_get_udma_mask — literally the function that gets you the mask of UDMA pipeline IDs. that's the whole vibe. ✨

this page is straight out of the Ionic Programmer's Manual, section 3, and we're gonna walk through it together, no cap.

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🎀 SYNOPSIS 🎀

like, here's how you actually call it:

#include <infiniband/ionic_dv.h>

uint8_t ionic_dv_ctx_get_udma_mask(struct ibv_context *ibctx);

that #include path is infiniband/ionic_dv.h — copy it exactly, don't be creative with it, bestie. 🫶

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✨ DESCRIPTION ✨

so ionic_dv_ctx_get_udma_mask() returns a bitmask of all the UDMA pipeline IDs available on the ionic device that's associated with ibctx. every set bit? that's one available pipeline. periodt. 💅

the mask you get back represents the full set of pipelines the device supports — the whole squad, the entire roster. and here's the important part, so listen up: a protection domain's UDMA mask (the one you set via ionic_dv_pd_set_udma_mask(3)) must be a subset of this device mask. no wildcards, no stretching, it's gotta fit inside the group chat. 🙈

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🦋 ARGUMENTS 🦋

• ibctx — the device context you're querying. and it must be an ionic device context. like, this is not optional, this is the entry requirement. 👑

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🌸 RETURN VALUE 🌸

returns a bitmask of available UDMA pipeline IDs — iconic, useful, exactly what you asked for. ✨

but if ibctx is not an ionic device context? you get 0. that's it. that's the whole answer. zero. 💀

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🔥 SEE ALSO 🔥

go read these next, iykwim:

• ionicdv(7)
• ionic_dv_ctx_get_udma_count(3)
• ionic_dv_pd_get_udma_mask(3)
• ionic_dv_pd_set_udma_mask(3)

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👑 AUTHORS 👑

Advanced Micro Devices, Inc. — they made this, we love them for it. 🫶

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and that's a wrap, bestie!! this lil gem is from the ionic manual, dated 2025-06-23 — go forth and mask those UDMA pipeline IDs responsibly 💜✨🎀