STRUCT MMC_TEST_AREA(9)

💖 struct mmc_test_area(9) 💖

okay so welcome to the Kernel API Manual, bestie! today's main character is struct mmc_test_area(9), and it is literally the information situation for performance tests. no cap, it's giving structured test-area details with main character energy 🎀✨

🌸 NAME 🌸

struct mmc_test_area — information for performance tests. that's the name line, and it's lowkey iconic: this struct is the info holder for performance tests 💅

✨ SYNOPSIS ✨

okay so here's the struct in all its exact glory — do not come for the spacing, it's copied with love:

struct mmc_test_area {
    unsigned long max_sz;
    unsigned int dev_addr;
    unsigned int max_tfr;
    unsigned int max_segs;
    unsigned int max_seg_sz;
    unsigned int blocks;
    unsigned int sg_len;
    struct mmc_test_mem *mem;
    struct scatterlist *sg;
    struct scatterlist *sg_areq;
 };

💅 Members 💅

the member breakdown, and no skipping, bestie — every single one is here:

• max_sz — test area size (in bytes). yes, bytes, bestie, keep up 💖
• dev_addr — address on card at which to do performance tests 🎀
• max_tfr — maximum transfer size allowed by driver (in bytes) ✨
• max_segs — maximum segments allowed by driver in scatterlist sg 🦋
• max_seg_sz — maximum segment size allowed by driver 🌸
• blocks — number of (512 byte) blocks currently mapped by sg 💅
• sg_len — length of currently mapped scatterlist sg 🫶
• mem — allocated memory 😭
• sg — scatterlist 🔥
• sg_areq — scatterlist for non-blocking request 👑

🌈 SEE ALSO 🌈

the see-also crew is giving linked-list energy, and every one is invited:

• Kernel file ./drivers/mmc/core/mmc_test.c
• struct mmc_test_pages(9)
• struct mmc_test_mem(9)
• struct mmc_test_transfer_result(9)
• struct mmc_test_general_result(9)
• struct mmc_test_dbgfs_file(9)
• struct mmc_test_card(9)

and that's a wrap, bestie 🫶 this page is from the ./drivers/mmc/core source, dated October 2026, and it's the struct mmc_test_area(9) page. go off and read it again if you need, mwah 💖✨🎀