STRUCT QDIO_INITIALIZE(9)

💖 struct qdio_initialize(9) 💖

okay bestie, welcome to the Kernel API Manual entry for struct qdio_initialize — literally the qdio initialization data glow-up. it's the lil struct you fill out so qdio knows what you want. main character energy fr fr 💅

✨ SYNOPSIS ✨

here's the whole vibe, every single field, no skips:

struct qdio_initialize {
    unsigned char q_format;
    unsigned char qdr_ac;
    unsigned int qib_param_field_format;
    unsigned char *qib_param_field;
    unsigned char qib_rflags;
    unsigned int no_input_qs;
    unsigned int no_output_qs;
    qdio_handler_t *input_handler;
    qdio_handler_t *output_handler;
    void (*irq_poll)(struct ccw_device *cdev, unsigned long data);
    unsigned long int_parm;
    struct qdio_buffer ***input_sbal_addr_array;
    struct qdio_buffer ***output_sbal_addr_array;
 };

like, look at her. she's structured. she's organized. she's everything. 🎀

🌸 Members 🌸

bestie let's go field by field, i've got you:

• q_format — the queue format. that's it, that's the whole thing 💖
• qdr_ac — feature flags to set. yes queen, set those flags ✨
• qib_param_field_format — the format for qib_parm_field. (and yes, we're definitely spelling it qib_parm_field here, that's not a typo, that's the manual, iykyk)
• qib_param_field — pointer to 128 bytes, or NULL if there's no param field. no field? no problem. 🙈
• qib_rflags — the rflags to set 🦋
• no_input_qs — number of input queues 🔥
• no_output_qs — number of output queues 🔥
• input_handler — the handler to be called for input queues, and device-wide errors. yes bestie, she covers the errors too, multitasking icon 👑
• output_handler — the handler to be called for output queues 💜
• irq_poll — the Data IRQ polling handler ⭐
• int_parm — interruption parameter 🎀
• input_sbal_addr_array — per-queue array, each element points to 128 SBALs. literally per-queue, literally 128, we don't round down 🧚
• output_sbal_addr_array — per-queue array, each element points to 128 SBALs. same energy, opposite direction 💅

🦋 SEE ALSO 🦋

go read your siblings, bestie, they're all iconic:

• Kernel file ./arch/s390/include/asm/qdio.h
• struct qdesfmt0(9)
• struct qdr(9)
• struct qib(9)
• struct slibe(9)
• struct qaob(9)
• struct slib(9)
• struct qdio_buffer_element(9)
• struct qdio_buffer(9)
• struct sl_element(9)
• struct sl(9)
• struct slsb(9)

ok that's the whole page bestie, nothing cut, nothing skipped, we ate and left no crumbs 💀✨

and a lil cute sign-off: this whole thing lives in ./arch/s390/include/asm, it's dated October 2026, and the page is struct qdio_initialize(9). mwah 🫶🌈🍓