STRUCT I3C_IBI_SLOT(9)

💖 NAME 💖

okay bestie, welcome to struct i3c_ibi_slot(9) from the Kernel API Manual — it's the I3C IBI (In-Band Interrupt) slot, and it's lowkey iconic 💅.

✨ SYNOPSIS ✨

here's the struct in all its glory, no cap:

       struct i3c_ibi_slot {
           struct work_struct work;
           struct i3c_dev_desc *dev;
           unsigned int len;
           void *data;
        };

🫶 Members 🫶

• work — the work associated with this slot; the IBI handler will be called from there.
• dev — the I3C device that has generated this IBI.
• len — length of the payload associated with this IBI.
• data — payload buffer.

💜 Description 💜

An IBI slot is an object that's pre-allocated by the controller and used when an IBI comes in. Every time an IBI comes in, the I3C master driver should find a free IBI slot in its IBI slot pool, retrieve the IBI payload, and queue the IBI using i3c_master_queue_ibi. literally the whole routine ✨.

How IBI slots are allocated is left to the I3C master driver, though for simple kmalloc-based allocation, the generic IBI slot pool can be used. iykyk 🧚.

🌈 SEE ALSO 🌈

Kernel file ./include/linux/i3c/master.h — and the whole squad:

• struct i3c_i2c_dev_desc(9)
• struct i2c_dev_boardinfo(9)
• struct i2c_dev_desc(9)
• struct i3c_device_ibi_info(9)
• struct i3c_dev_boardinfo(9)
• struct i3c_dev_desc(9)
• struct i3c_device(9)
• enum i3c_bus_mode(9)
• enum i3c_open_drain_speed(9)
• enum i3c_addr_slot_status(9)
• struct i3c_bus(9)
• struct i3c_master_controller_ops(9)
• struct i3c_master_controller(9)
• i3c_bus_for_each_i2cdev(9)
• i3c_bus_for_each_i3cdev(9)
• struct i3c_dma(9)
• i3c_dev_get_master_data(9)
• i3c_dev_set_master_data(9)
• i2c_dev_get_master_data(9)
• i2c_dev_set_master_data(9)
• i3c_dev_get_master(9)
• i2c_dev_get_master(9)
• i3c_master_get_bus(9)

mwah 💋 — source/version: ./include/linux/i3c; date: October 2026; page: struct i3c_ibi_slot(9). bye bestie 🫶