get_io_resource(9)

💅 get_io_resource(9) 💅

okay bestie, welcome to the Kernel API Manual page for get_io_resource(9) — this one is literally about finding a node in a resource list and dodging the ISA aliasing window. no cap. 💖

🌟 NAME 🌟

get_io_resource — find first node of given size not in ISA aliasing window.

✨ SYNOPSIS ✨

struct pci_resource * get_io_resource (struct pci_resource **head , u32 size );

🎀 ARGUMENTS 🎀

• head — the list to search. that's what you're passing in, bestie. 💅
• size — the size of node to find. must be a power of two. periodt.

🦋 DESCRIPTION 🦋

so here's the vibe: get_io_resource sorts the resource list by size, then returns the first node of size length that is not in the ISA aliasing window. iconic behavior, honestly. ✨

and if it finds a node larger than size? it will split it up. the way that it just goes in and divides the node… yeah. 🫶

🌸 SEE ALSO 🌸

Kernel file: ./drivers/pci/hotplug/cpqphp_ctrl.c — plus these absolute legends:

• cpqhp_find_slot(9)
• sort_by_size(9)
• sort_by_max_size(9)
• do_pre_bridge_resource_split(9)
• do_bridge_resource_split(9)
• get_max_resource(9)
• get_resource(9)
• cpqhp_resource_sort_and_combine(9)
• cpqhp_slot_create(9)
• slot_remove(9)
• bridge_slot_remove(9)
• cpqhp_slot_find(9)
• set_controller_speed(9)
• board_replaced(9)
• board_added(9)
• remove_board(9)
• cpqhp_pushbutton_thread(9)
• switch_leds(9)
• cpqhp_hardware_test(9)
• configure_new_device(9)
• configure_new_function(9)

xoxo, this page is coming from source/version ./drivers/pci/hotplug, dated October 2026. mwah 💜🎀