rvt_reg_user_mr(9)

💖 rvt_reg_user_mr(9) 💖

okay so bestie, welcome to the Kernel API Manual — this page is literally about registering a userspace memory region, and it’s giving main character energy. let’s get into it 🫶✨

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✨ NAME ✨

rvt_reg_user_mr — register a userspace memory region 💅

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🌸 SYNOPSIS 🌸

struct ib_mr * rvt_reg_user_mr (struct ib_pd *pd , u64 start , u64
length , u64 virt_addr , int mr_access_flags , struct ib_dmah *dmah ,
struct ib_udata *udata );

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🎀 ARGUMENTS 🎀

• pd — protection domain for this memory region 🛡️
• start — starting userspace address 📍
• length — length of region to register 📏
• virt_addr — associated virtual address 🌀
• mr_access_flags — access flags for this memory region 🔑
• dmah — dma handle 🎀
• udata — unused by the driver 🙈

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🔥 RETURN 🔥

the memory region on success, otherwise returns an errno 😭 like, success hands you the memory region and anything else is an error situation. no cap.

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🦋 SEE ALSO 🦋

Kernel file: ./drivers/infiniband/sw/rdmavt/mr.c 📁

the whole squad, in order:

• rvt_driver_mr_init(9)
• rvt_mr_exit(9)
• rvt_alloc_lkey(9)
• rvt_free_lkey(9)
• rvt_get_dma_mr(9)
• rvt_dereg_clean_qp_cb(9)
• rvt_dereg_clean_qps(9)
• rvt_check_refs(9)
• rvt_mr_has_lkey(9)
• rvt_ss_has_lkey(9)
• rvt_dereg_mr(9)
• rvt_alloc_mr(9)
• rvt_set_page(9)
• rvt_map_mr_sg(9)
• rvt_fast_reg_mr(9)
• rvt_invalidate_rkey(9)
• rvt_sge_adjacent(9)
• rvt_lkey_ok(9)
• rvt_rkey_ok(9)

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mwah 💋 this iconic little page comes from the source/version ./drivers/infiniband/sw/rdmavt, dated October 2026, and it’s literally called rvt_reg_user_mr(9). periodt. 💜✨