STRUCT MPT3_IOCTL_COMMAND(9)

🎀 NAME 🎀

okay so bestie, welcome to the Kernel API Manual entry for struct mpt3_ioctl_command — the generic mpt firmware passthru ioctl. it’s giving “one struct, lots of pointer fields,” and every single field is right here:

• @hdr — generic header.
• @timeout — command timeout in seconds. (if zero then use driver default value).
• @reply_frame_buf_ptr — reply location.
• @data_in_buf_ptr — destination for read.
• @data_out_buf_ptr — data source for write.
• @sense_data_ptr — sense data location.
• @max_reply_bytes — maximum number of reply bytes to be sent to app.
• @data_in_size — number bytes for data transfer in (read).
• @data_out_size — number bytes for data transfer out (write).
• @max_sense_bytes — maximum number of bytes for auto sense buffers.
• @data_sge_offset — offset in words from the start of the request message to the first SGL.

and the NAME line wraps up with @mf[1]; — yes, semicolon included, no cap 💅

✨ SYNOPSIS ✨

the shape is literally this, copied exactly, no edits:

       struct mpt3_ioctl_command {
           struct mpt3_ioctl_header hdr;
           uint32_t timeout;
           void __user *reply_frame_buf_ptr;
           void __user *data_in_buf_ptr;
           void __user *data_out_buf_ptr;
           void __user *sense_data_ptr;
           uint32_t max_reply_bytes;
           uint32_t data_in_size;
           uint32_t data_out_size;
           uint32_t max_sense_bytes;
           uint32_t data_sge_offset;
           uint8_t mf[1];
        };

🌟 Members 🌟

the original page has this heading and then nothing under it. it’s giving mystery, but there are no member notes to add here, periodt.

💜 SEE ALSO 💜

Kernel file: ./drivers/scsi/mpt3sas/mpt3sas_ctl.h

all the struct besties, none skipped:

• struct mpt3_ioctl_header(9)
• struct mpt3_ioctl_diag_reset(9)
• struct mpt3_ioctl_pci_info(9)
• struct mpt3_ioctl_iocinfo(9)
• struct mpt3_ioctl_eventquery(9)
• struct mpt3_ioctl_eventenable(9)
• struct MPT3_IOCTL_EVENTS(9)
• struct mpt3_ioctl_eventreport(9)
• struct mpt3_ioctl_btdh_mapping(9)
• struct mpt3_diag_register(9)
• struct mpt3_diag_unregister(9)
• struct mpt3_diag_query(9)
• struct mpt3_diag_release(9)
• struct mpt3_diag_read_buffer(9)
• struct mpt3_addnl_diag_query(9)
• struct mpt3_enable_diag_sbr_reload(9)
• struct mpt3_passthru_command(9)

source/version: ./drivers/scsi/mpt3sas · date: October 2026 · page: struct mpt3_ioctl_command(9) — bye bestie, stay iconic 💖