tsi721_sr2pc_ch_msix(9)

💅 tsi721_sr2pc_ch_msix(9)

okay bestie, so this is a page straight out of the Kernel API Manual — yes, the actual kernel docs, we're reading those now, look at us go 🎀 — and it's about one very specific little interrupt handler. Let's get into it ✨

---

✨ NAME ✨

tsi721_sr2pc_ch_msix — the Tsi721 MSI-X SR2PC Channel interrupt handler. that's it, that's the whole vibe 💖

---

🌸 SYNOPSIS 🌸

irqreturn_t tsi721_sr2pc_ch_msix (int irq , void *ptr );

like, it takes two things and returns an irqreturn_t. iconic behaviour, no notes 🫶

---

🦋 ARGUMENTS 🦋

• irq — the Linux interrupt number. that's the number the kernel uses to say "hey, something happened" 💫
• ptr — pointer to interrupt-specific data, and in this case that's a tsi721_device structure. so it's like, which device are we talking about, bestie? this pointer knows 👑

---

🧚 DESCRIPTION 🧚

it handles Tsi721 interrupts coming from the SR2PC Channel. that's the job. it shows up, it handles them, it leaves 💅

---

💀 NOTE 💀

at this moment it services only one SR2PC channel, the one associated with inbound doorbells. so don't come for it expecting multitasking energy — it's a one-channel kind of handler, and that's lowkey the whole situation 😭

---

⭐ RETURN ⭐

IRQ_HANDLED — that's the answer, that's the whole return value, periodt 🔥

---

🌈 SEE ALSO 🌈

kernel file ./drivers/rapidio/devices/tsi721.c, plus a whole friend group of related functions, we're listing every single one because that's how we do it:

tsi721_lcread(9), 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_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)

iykyk 🧚

---

and that's a wrap, bestie 🍓 this little cutie came from ./drivers/rapidio/devices and it's dated October 2026 — see you in the next one, mwah 💜🎀