STRUCT UTP_TRANSFER_REQ_DESC(9)

💅 struct utp_t...fer_req_desc(9) 💅

okay so bestie, we're in the Kernel API Manual, section 9, and today's main character is struct utp_t...fer_req_desc(9). No cap, this page is all about the UTRD vibes and every little DW is invited to the function. 🫶✨

🌸 NAME 🌸

struct utp_transfer_req_desc — UTP Transfer Request Descriptor (UTRD). That's the name, that's the assignment, periodt. 💖

✨ SYNOPSIS ✨

here's the whole struct, looking iconic in its natural habitat:

struct utp_transfer_req_desc {
    struct request_desc_header header;
    __le64 command_desc_base_addr;
    __le16 response_upiu_length;
    __le16 response_upiu_offset;
    __le16 prd_table_length;
    __le16 prd_table_offset;
 };

that closing brace is doing its little lean, and yes, we respect it. 🎀

🎀 Members 🎀

okay, field-by-field roll call — no skipping, bestie:

• header — UTRD header DW-0 to DW-3. Bestie said "header" and meant business. 👑
• command_desc_base_addr — UCD base address DW 4-5. Note the spacing: DW 4-5, exactly as the page says. 💅
• response_upiu_length — response UPIU length DW-6. She's measuring the UPIU, not guessing. ✨
• response_upiu_offset — response UPIU offset DW-6. Same DW, different job — teamwork. 🫶
• prd_table_length — Physical region descriptor length DW-7. Capital P, capital R, capital D, all the letters. 🌸
• prd_table_offset — Physical region descriptor offset DW-7. The offset counterpart, slaying in the same DW. 💖

🌈 SEE ALSO 🌈

when you're done here, the Kernel file ./include/ufs/ufshci.h is the place to peek, and the squad to check next is struct ufshcd_sg_entry(9), struct utp_transfer_cmd_desc(9), and struct request_desc_header(9). iykyk — the whole UFS friend group is linked up. 🦋

xoxo, your Kernel API Manual bestie 💖 source/version: ./include/ufs; date: October 2026; and the footer is still repping struct utp_t...fer_req_desc(9). periodt. 🌟