irdma_alloc_mr(9)

💅 irdma_alloc_mr(9)

okay so bestie, welcome to another episode of the Linux kernel API manual — this one's irdma_alloc_mr, straight out of the Kernel API Manual, and it's literally the function that registers a stag for fast memory registration. it's giving "my memory but make it registered" energy ✨

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🌸 NAME

irdma_alloc_mr — register stag for fast memory registration 🎀

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🦋 SYNOPSIS

struct ib_mr * irdma_alloc_mr (struct ib_pd *pd , enum ib_mr_type
mr_type , u32 max_num_sg );

no cap, that's the whole signature. three args, one struct ib_mr * coming back at you 🫶

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✨ ARGUMENTS

• pd — the ibpd pointer 💜 like, your protection domain, the whole vibe container for this memory region
• mr_type — memory for stag registration ⭐ this is where you tell it what kind of stag situation we're doing
• max_num_sg — max number of pages 📄 the ceiling on how many pages you're bringing to this party

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🔥 SEE ALSO

the kernel file lives at ./drivers/infiniband/hw/irdma/verbs.c and honestly it's the main character of this whole saga — go read it if you're nosy (iykyk) 👑

and here's the entire friend group, nobody left behind, periodt:

• irdma_query_device(9)
• irdma_query_port(9)
• irdma_disassociate_ucontext(9)
• irdma_mmap(9)
• irdma_alloc_push_page(9)
• irdma_alloc_ucontext(9)
• irdma_dealloc_ucontext(9)
• irdma_alloc_pd(9)
• irdma_dealloc_pd(9)
• irdma_get_pbl(9)
• irdma_clean_cqes(9)
• _irdma_destroy_qp(9)
• irdma_destroy_qp(9)
• irdma_setup_virt_qp(9)
• irdma_setup_umode_qp(9)
• irdma_setup_kmode_qp(9)
• irdma_create_qp(9)
• irdma_query_qp(9)
• irdma_query_pkey(9)
• irdma_modify_qp_roce(9)
• irdma_modify_qp(9)
• irdma_srq_free_rsrc(9)
• irdma_cq_free_rsrc(9)
• irdma_free_cqbuf(9)
• irdma_process_resize_list(9)
• irdma_destroy_srq(9)
• irdma_destroy_cq(9)
• irdma_resize_cq(9)
• irdma_srq_event(9)
• irdma_modify_srq(9)
• irdma_create_srq(9)
• irdma_query_srq(9)
• irdma_create_cq(9)
• irdma_get_mr_access(9)
• irdma_free_stag(9)
• irdma_create_stag(9)
• irdma_next_pbl_addr(9)
• irdma_copy_user_pgaddrs(9)
• irdma_check_mem_contiguous(9)
• irdma_check_mr_contiguous(9)
• irdma_setup_pbles(9)
• irdma_handle_q_mem(9)
• irdma_hw_alloc_mw(9)
• irdma_alloc_mw(9)
• irdma_dealloc_mw(9)
• irdma_hw_alloc_stag(9)
• irdma_set_page(9)
• irdma_map_mr_sg(9)
• irdma_hwreg_mr(9)
• irdma_reg_user_mr(9)
• irdma_reg_phys_mr(9)
• irdma_get_dma_mr(9)
• irdma_del_memlist(9)
• irdma_dereg_mr(9)
• irdma_post_send(9)
• irdma_post_srq_recv(9)
• irdma_post_recv(9)
• irdma_flush_err_to_ib_wc_status(9)
• irdma_process_cqe(9)
• irdma_poll_one(9)
• __irdma_poll_cq(9)
• irdma_poll_cq(9)
• irdma_req_notify_cq(9)
• irdma_alloc_hw_port_stats(9)
• irdma_get_hw_stats(9)
• irdma_query_gid(9)
• mcast_list_add(9)
• mcast_list_del(9)
• mcast_list_lookup_ip(9)
• irdma_mcast_cqp_op(9)
• irdma_mcast_mac(9)
• irdma_attach_mcast(9)
• irdma_detach_mcast(9)
• irdma_ah_exists(9)
• irdma_destroy_ah(9)
• irdma_create_user_ah(9)
• irdma_create_ah(9)
• irdma_query_ah(9)
• irdma_init_roce_device(9)
• irdma_init_iw_device(9)
• irdma_init_rdma_device(9)
• irdma_port_ibevent(9)
• irdma_ib_unregister_device(9)
• irdma_ib_register_device(9)
• irdma_ib_dealloc_device(9)

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bestie note: that list is LONG long. it's giving "linked list of doom" but every single one is a real page, so go off 💀

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okay that's the whole page, mwah 💖 this one came from ./drivers/infiniband/hw/irdma, dated October 2026, and it's filed under irdma_alloc_mr(9) — slay, go register some stag, you absolute icon 🌈👑