irdma_hw_alloc_stag(9)

💅 irdma_hw_alloc_stag — from the Kernel API Manual, bestie ✨

okay so picture this: you're deep in the kernel, you need a stag allocated, and there's exactly one cute little function for that. bestie, meet irdma_hw_alloc_stag — the cqp command that gets your stag allocated. no cap, that's literally the whole name description. 🎀

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🌸 NAME 🌸

irdma_hw_alloc_stag — cqp command to allocate stag 💖

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✨ SYNOPSIS ✨

int irdma_hw_alloc_stag (struct irdma_device *iwdev , struct irdma_mr
*iwmr );

that's it. that's the whole signature. two pointers and an int. iconic behavior honestly 🫶

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🦋 ARGUMENTS 🦋

• iwdev — the irdma device, aka your main character. it's a struct irdma_device * and yes she's required 💅
• iwmr — the irdma mr pointer, a struct irdma_mr *. this is the memory region bestie you're doing all this for 🌸

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👑 SEE ALSO 👑

the kernel file ./drivers/infiniband/hw/irdma/verbs.c is where all this lives, and it comes with an entire friend group of manpages (9)-section icons — ngl this list is a whole roster, so buckle up 🎢:

• device & port basics: irdma_query_device(9), irdma_query_port(9), irdma_disassociate_ucontext(9), irdma_mmap(9)
• contexts & push pages: irdma_alloc_push_page(9), irdma_alloc_ucontext(9), irdma_dealloc_ucontext(9)
• protection domains: irdma_alloc_pd(9), irdma_dealloc_pd(9)
• pbl & cqe cleanup: irdma_get_pbl(9), irdma_clean_cqes(9)
• queue pairs: _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)
• srq / cq crew: 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)
• mr / stag / pbl lore: 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)
• memory windows & memory regions: irdma_hw_alloc_mw(9), irdma_alloc_mw(9), irdma_dealloc_mw(9), irdma_alloc_mr(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)
• sending, receiving & polling: 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)
• stats & gids: irdma_alloc_hw_port_stats(9), irdma_get_hw_stats(9), irdma_query_gid(9)
• multicast moment: 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)
• address handles: irdma_ah_exists(9), irdma_destroy_ah(9), irdma_create_user_ah(9), irdma_create_ah(9), irdma_query_ah(9)
• device init & registration: 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)

like, that's the whole verbs.c extended universe, fr fr 🌈

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ok that's the page!! it came from ./drivers/infiniband/hw/irdma, it's dated October 2026, and it answers to the name irdma_hw_alloc_stag(9) — go forth and allocate that stag, bestie 💜🧚‍♀️