irdma_find_pd_index_limit(9)

💅 NAME 💅

irdma_find_pd_index_limit — bestie, this one finds your page descriptor index limit ✨

Oh and hey, quick vibe check before we dive in: this is a page from the Kernel API Manual, section 9 of the manual pages (the kernel-API girlies, iykyk). Just so you know where you're standing 🎀

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🌸 SYNOPSIS 🌸

void irdma_find_pd_index_limit (struct irdma_hmc_info *hmc_info , u32
type , u32 idx , u32 cnt , u32 *pd_idx , u32 *pd_limit );

That's the whole signature, no cap — returns void, takes six arguments, and it's literally copied exactly so don't come for me 💅

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🫶 ARGUMENTS 🫶

Okay so here's the cast of characters, and every single one of them matters:

• hmc_info — pointer to the HMC configuration information struct. It's giving "the master doc", the glow-up source of truth, the struct we're all here for 👑
• type — the HMC resource type we're examining. Bestie, this is the what are we even looking at argument.
• idx — starting index for the object. Where the story begins ✨
• cnt — number of objects we're trying to create. How many we're pulling up to the party 🎉
• pd_idx — pointer to return the page descriptor index. This one's an output — it gets written back to, so keep it valid, fr fr 🙈
• pd_limit — pointer to return the page descriptor index limit. Also an output, also needs to be a real pointer, also slays 💖

Both pd_idx and pd_limit are pointers the function returns values through — so don't hand it garbage, okay? 😭

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🦋 DESCRIPTION 🦋

So what does it actually do? It calculates the page descriptor index and index limit for the resource defined by irdma_hmc_rsrc_type. That's it, that's the whole thing — it does the math and hands you back two numbers through pd_idx and pd_limit. Lowkey iconic of it, honestly ⭐

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⭐ SEE ALSO ⭐

The kernel file it lives in, for anyone who wants to go read the source like the main character they are:

• ./drivers/infiniband/hw/irdma/hmc.c

And the whole friend group — no gatekeeping here, here's every single one of them:

• irdma_find_sd_index_limit(9)
• irdma_set_sd_entry(9)
• irdma_clr_sd_entry(9)
• irdma_invalidate_pf_hmc_pd(9)
• irdma_hmc_sd_one(9)
• irdma_hmc_sd_grp(9)
• irdma_hmc_finish_add_sd_reg(9)
• irdma_sc_create_hmc_obj(9)
• irdma_finish_del_sd_reg(9)
• irdma_sc_del_hmc_obj(9)
• irdma_add_sd_table_entry(9)
• irdma_add_pd_table_entry(9)
• irdma_remove_pd_bp(9)
• irdma_prep_remove_sd_bp(9)
• irdma_prep_remove_pd_page(9)

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🧚 SIGN-OFF 🧚

That's the whole page, bestie, you ate that 🍓 It ships out of ./drivers/infiniband/hw/irdma, dated October 2026, and it goes by irdma_find_pd_index_limit(9) — remember the name 💜

Later, love you, bye! 🌈💖