tsi721_lcread(9)

💖 NAME 💖

tsi721_lcread — read from local SREP config space.

okay so this is the tsi721_lcread(9) page from the Kernel API Manual, and it's here to do exactly what it says: read from local SREP config space. iconic behavior, honestly ✨

✨ SYNOPSIS ✨

int tsi721_lcread (struct rio_mport *mport , int index , u32 offset ,
       int len , u32 *data );

🎀 ARGUMENTS 🎀

• mport — RapidIO master port info. the main-character port info.
• index — ID of RapdiIO interface. (yes, “RapdiIO” is exactly how it’s written here — we don’t edit the lore 🫶)
• offset — Offset into configuration space.
• len — Length (in bytes) of the maintenance transaction.
• data — Value to be read into.

🦋 DESCRIPTION 🦋

Okay so it generates a local SREP space read. That’s the whole plot, bestie — no extra lore, no cap. Local SREP space read: generated. 💅

🌸 RETURN 🌸

0 on success or -EINVAL on failure.

So yeah: success is giving 0, failure is giving -EINVAL. we love a simple return section 😭

🔥 SEE ALSO 🔥

okay bestie, the cross-reference section is long, but every single one is here, no cap:

• Kernel file: ./drivers/rapidio/devices/tsi721.c
• tsi721_lcwrite(9)
• tsi721_maint_dma(9)
• tsi721_cread_dma(9)
• tsi721_cwrite_dma(9)
• tsi721_pw_handler(9)
• tsi721_pw_enable(9)
• tsi721_dsend(9)
• tsi721_dbell_handler(9)
• tsi721_irqhandler(9)
• tsi721_omsg_msix(9)
• tsi721_imsg_msix(9)
• tsi721_srio_msix(9)
• tsi721_sr2pc_ch_msix(9)
• tsi721_request_msix(9)
• tsi721_enable_msix(9)
• tsi721_init_pc2sr_mapping(9)
• tsi721_rio_map_inb_mem(9)
• tsi721_rio_unmap_inb_mem(9)
• tsi721_init_sr2pc_mapping(9)
• tsi721_port_write_init(9)
• tsi721_bdma_maint_init(9)
• tsi721_add_outb_message(9)
• tsi721_omsg_handler(9)
• tsi721_open_outb_mbox(9)
• tsi721_close_outb_mbox(9)
• tsi721_imsg_handler(9)
• tsi721_open_inb_mbox(9)
• tsi721_close_inb_mbox(9)
• tsi721_add_inb_buffer(9)
• tsi721_get_inb_message(9)
• tsi721_messages_init(9)
• tsi721_query_mport(9)
• tsi721_disable_ints(9)
• tsi721_setup_mport(9)

okay bye bestie 🫶 this page’s source/version is ./drivers/rapidio/devices, dated October 2026, and it’s filed as tsi721_lcread(9). periodt. 💅✨