idpf_req_rel_vector_indexes(9)

💖 idpf_req_rel_vector_indexes(9) 💖

okay bestie, welcome to the Kernel API Manual page for this absolute icon: idpf_req_rel_vector_indexes. It’s giving “request or release MSIX vector indexes” energy, and we’re gonna get through it together, no cap. 🦋✨

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🌸 NAME 🌸

idpf_req_rel_vector_indexes — request or release MSIX vector indexes. 💅

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✨ SYNOPSIS ✨

int idpf_req_rel_vector_indexes (struct idpf_adapter *adapter , u16
       *q_vector_idxs , struct idpf_vector_info *vec_info );

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🎀 ARGUMENTS 🎀

• adapter — driver specific private structure 🌈
• q_vector_idxs — vector index array ⭐
• vec_info — info related to the number of vectors 🫶

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🔥 DESCRIPTION 🔥

So this is the core function for distributing the MSIX vectors that were acquired from the OS. It expects the caller to pass the number of vectors required and also the ones previously allocated. 💖

First, it stashes the previously allocated vector indexes on to the stack, and then it figures out if it can allocate the requested vectors. Heads-up: it can wait on acquiring the mutex lock. 😭

If the caller passes 0 as requested vectors, then this function just stashes the already allocated vectors and returns 0. Easy peasy. ✨

It returns the actual number of vectors allocated on success, or an error value on failure. If 0 is returned, that implies the stack has no vectors to allocate — which is also a failure case for the caller. 💀

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🦋 SEE ALSO 🦋

• Kernel file: ./drivers/net/ethernet/intel/idpf/idpf_lib.c 👑
• idpf_init_vector_stack(9), idpf_deinit_vector_stack(9), idpf_mb_intr_rel_irq(9), idpf_intr_rel(9), idpf_mb_intr_clean(9), idpf_mb_irq_enable(9), idpf_mb_intr_req_irq(9), idpf_mb_intr_init(9)
• idpf_vector_lifo_push(9), idpf_vector_lifo_pop(9), idpf_vector_stash(9), idpf_intr_req(9), idpf_del_all_flow_steer_filters(9), idpf_find_mac_filter(9), __idpf_del_mac_filter(9), idpf_del_mac_filter(9), __idpf_add_mac_filter(9), idpf_add_mac_filter(9), idpf_del_all_mac_filters(9), idpf_restore_mac_filters(9), idpf_remove_mac_filters(9)
• idpf_deinit_mac_addr(9), idpf_init_mac_addr(9), idpf_cfg_netdev(9), idpf_get_free_slot(9), idpf_remove_features(9), idpf_vport_stop(9), idpf_stop(9), idpf_decfg_netdev(9), idpf_vport_rel(9), idpf_vport_dealloc(9), idpf_is_hsplit_supported(9), idpf_vport_get_hsplit(9), idpf_vport_set_hsplit(9), idpf_vport_alloc(9)
• idpf_get_stats64(9), idpf_statistics_task(9), idpf_mbx_task(9), idpf_service_task(9), idpf_restore_features(9), idpf_set_real_num_queues(9), idpf_up_complete(9), idpf_rx_init_buf_tail(9), idpf_vport_open(9), idpf_init_task(9), idpf_sriov_ena(9), idpf_sriov_configure(9), idpf_deinit_task(9)
• idpf_check_reset_complete(9), idpf_init_hard_reset(9), idpf_vc_event_task(9), idpf_initiate_soft_reset(9), idpf_addr_sync(9), idpf_addr_unsync(9), idpf_set_rx_mode(9), idpf_set_features(9), idpf_open(9), idpf_change_mtu(9), idpf_chk_tso_segment(9), idpf_features_check(9), idpf_set_mac(9)

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mwah 💋 — this cutie is from the Kernel API Manual, source path ./drivers/net/ethernet/intel/idpf, dated October 2026. 🎀👑