STRUCT PCIE_BWCTRL_DATA(9)

okay so bestie, this is the struct pcie_bwctrl_data(9) page from the Kernel API Manual — and it’s literally the PCIe bandwidth controller. no cap, she’s iconic for keeping bandwidth behavior in check. 💅

✨ NAME ✨

struct pcie_bwctrl_data — PCIe bandwidth controller. that’s the whole vibe. periodt. 👑

🛠️ SYNOPSIS 🛠️

       struct pcie_bwctrl_data {
           struct mutex set_speed_mutex;
           struct thermal_cooling_device *cdev;
        };

🌸 Members 🌸

• set_speed_mutex — serializes link speed changes. think of it as the group-chat mod making sure nobody changes the link speed at the exact same time, fr fr. 🔒
• cdev — the thermal cooling device associated with the port. it’s giving “this port has a cooling bestie” 🌬️.

👀 SEE ALSO 👀

• Kernel file ./drivers/pci/pcie/bwctrl.c
• pcie_bwctrl_select_speed(9)
• pcie_set_target_speed(9)

cute sign-off: source/version is ./drivers/pci/pcie, date is October 2026. mwah 💋✨