WMI EVENT RECEIVING - THEORY OF OPERATIONS(9)

🦋 WMI event receiving - theory of operations

okay bestie, this is the Kernel API Manual page for WMI event receiving — theory of operations, and it's literally all about how events get from firmware into the kernel without blocking the IRQ thread. no cap. 💅

When firmware is about to report a WMI event, it fills a memory area in the mailbox and raises misc. IRQ. The thread interrupt handler is invoked for that misc IRQ, and the function wmi_recv_cmd is called by the thread IRQ handler. ✨

wmi_recv_cmd reads the event, allocates a memory chunk, and attaches it to the event list wil->pending_wmi_ev. Then the work queue wil->wmi_wq wakes up and handles events inside wmi_event_worker. Every event gets detached from the list, processed, and deleted. 🫶

The whole purpose of this mechanism is to release the IRQ thread — otherwise, if WMI event handling involves another WMI command flow, that 2-nd flow won't be completed because of the blocked IRQ thread. 😭 like, the IRQ thread is not trying to be stuck in traffic, periodt.

👑 SEE ALSO

• Kernel file ./drivers/net/wireless/ath/wil6210/wmi.c
• Addressing - theory of operations(9)
• wmi_addr_remap(9)
• wil_find_fw_mapping(9)
• wmi_buffer_block(9)
• wmi_rxon(9)

huge slay to everyone in that list, iykyk. 💖

okay that's the whole page, bestie — from the Kernel API Manual, with the footer source/version vibes pointing at ./drivers/net/wireless/ath/wil... and dated October 2026. 🌈🎀