pcmcia_request_io(9)

🎀 NAME 🎀

okay so this is pcmcia_request_io(9) from the Kernel API Manual, and the short version is iconic: it’s the function that attempts to reserve port ranges for PCMCIA devices. bestie, that’s the whole vibe.

✨ SYNOPSIS ✨

int pcmcia_request_io (struct pcmcia_device *p_dev );

🫶 ARGUMENTS 🫶

• p_dev — the associated PCMCIA device. That’s the one you’re handing over, no cap.

🔥 DESCRIPTION 🔥

So pcmcia_request_io attempts to reserve the IO port ranges specified in struct pcmcia_device p_dev->resource[0] and p_dev->resource[1]. The "start" value is the requested start of the IO port resource; "end" reflects the number of ports requested. The number of IO lines requested is specified in struct pcmcia_device p_dev->io_lines.

Literally that’s the whole description, and it’s giving “reserve the range, bestie” energy. Periodt.

🌈 SEE ALSO 🌈

Kernel file: ./drivers/pcmcia/pcmcia_resource.c

go read these too, iykyk:

• release_io_space(9)
• alloc_io_space(9)
• pcmcia_map_mem_page(9)
• pcmcia_fixup_iowidth(9)
• pcmcia_fixup_vpp(9)
• pcmcia_release_configuration(9)
• pcmcia_release_io(9)
• pcmcia_release_window(9)
• pcmcia_enable_device(9)
• pcmcia_request_irq(9)
• pcmcia_setup_isa_irq(9)
• pcmcia_setup_irq(9)
• pcmcia_request_window(9)
• pcmcia_disable_device(9)

and that’s the page, bestie 💖 signing off from the ./drivers/pcmcia source corner, dated October 2026 🫶✨