STRUCT WCN36XX_DXE_DESC(9)

🎀 struct wcn36xx_dxe_desc(9) 🎀

okay bestie, welcome to the Kernel API Manual ✨ — this is the page for struct wcn36xx_dxe_desc, and it's literally just one struct but it's kind of a big deal. It describes the descriptor of one DXE buffer. That's the whole vibe. Let's get into it 💅

---

💖 NAME 💖

struct wcn36xx_dxe_desc — describes descriptor of one DXE buffer. yes that's it, that's the name, no notes 🫶

---

🌸 SYNOPSIS 🌸

here's the whole thing, bestie, laid out exactly as it lives in the kernel:

struct wcn36xx_dxe_desc {
    u32 ctrl;
    u32 fr_len;
    u32 src_addr_l;
    u32 dst_addr_l;
    u32 phy_next_l;
    u32 src_addr_h;
    u32 dst_addr_h;
    u32 phy_next_h;
 };

like, eight u32s and then one of them is doing a lot of heavy lifting. main character energy fr fr 👑

---

✨ Members ✨

• ctrl — ok so this one is the icon, the moment, the whole personality. It's a union made up of the following bits, and I'm giving you the receipts verbatim because every single bit matters:

union { u32 valid           :1; //0 = DMA stop, 1 = DMA continue with this
                                //descriptor
u32     transfer_type   :2; //0 = Host to Host space
u32     eop             :1; //End of Packet
u32     bd_handling     :1; //if transferType = Host to BMU, then 0
                            // means first 128 bytes contain BD, and 1
                            // means create new empty BD
u32     siq             :1; // SIQ
u32     diq             :1; // DIQ
u32     pdu_rel         :1; //0 = don't release BD and PDUs when done,
                            // 1 = release them
u32     bthld_sel       :4; //BMU Threshold Select
u32     prio            :3; //Specifies the priority level to use for
                            // the transfer
u32     stop_channel    :1; //1 = DMA stops processing further, channel
                            //requires re-enabling after this
u32     intr            :1; //Interrupt on Descriptor Done
u32     rsvd            :1; //reserved
u32     size            :14;//14 bits used - ignored for BMU transfers,
                            //only used for host to host transfers?
} ctrl;

• fr_len — a member, and honestly the original doesn't say a single word more about it here. no description, no lore, nothing 😭 go read the kernel file if you want the tea.
• src_addr_l — listed as a member, that's all the docs give us. it's giving "figure it out" 🙈
• dst_addr_l — member. no writeup. slay anyway 💜
• phy_next_l — member, no extra detail in this page.
• src_addr_h — member, no extra detail in this page.
• dst_addr_h — member, no extra detail in this page.
• phy_next_h — member, and that's the last one. no extra detail here either ✨

lowkey the vibes of this page are "the ctrl union ate and the rest of the members are just standing there" — but hey, they're all still listed, nothing's getting left out on my watch 🫶

---

🔥 SEE ALSO 🔥

• Kernel file ./drivers/net/wireless/ath/wcn36xx/dxe.h — that's where the real source of truth lives, bestie. go look 👀

---

and that's the page!! 🦋 big kiss, mwah 💋 — this was struct wcn36xx_dxe_desc(9) from the Kernel API Manual, pulled from source ./drivers/net/wireless/ath/wcn..., dated October 2026. periodt. 🌈⭐