STRUCT SDW_MSG(9)

💖 struct sdw_msg(9) 💖

okay bestie, welcome to the Kernel API Manual page for struct sdw_msg(9) — yes, we're doing struct lore today and it's lowkey iconic. This is the message structure, and it's giving main character energy. Periodt. 💅

💖 NAME 💖

struct sdw_msg - Message structure. That's the name vibe, fr fr — it's a message structure and it said what it said. 👑

✨ SYNOPSIS ✨

Here's the struct in all its main-character glory, no cap:

struct sdw_msg {
    u16 addr;
    u16 len;
    u8 dev_num;
    u8 addr_page1;
    u8 addr_page2;
    u8 flags;
    u8 *buf;
    bool ssp_sync;
    bool page;
 };

🫶 Members 🫶

Every member has a job, and they're all eating. Let's go through them one by one, bestie:

• addr — Register address accessed in the Slave.
• len — number of messages.
• dev_num — Slave device number.
• addr_page1 — SCP address page 1 Slave register.
• addr_page2 — SCP address page 2 Slave register.
• flags — transfer flags, indicate if xfer is read or write.
• buf — message data buffer.
• ssp_sync — Send message at SSP (Stream Synchronization Point).
• page — address requires paging.

🌈 SEE ALSO 🌈

Go peek at the Kernel file ./drivers/soundwire/bus.h and these iconic little references, iykyk:

• struct sdw_bpt_section(9)
• struct sdw_bpt_msg(9)
• struct sdw_port_runtime(9)
• struct sdw_slave_runtime(9)
• struct sdw_master_runtime(9)

That's the whole page, bestie! 🎀 The source/version is ./drivers/soundwire, it's dated October 2026, and it's all for struct sdw_msg(9) — mwah 💋 byeee! 💜