sis900_timer(9)

💅 sis900_timer — like, the sis900 timer routine, bestie

Okay so this is a page from the Kernel API Manual (section 9, kernel developer stuff, iykyk) and it's all about sis900_timer. Grab a strawberry 🍓 and let's get into it.

---

✨ SYNOPSIS ✨

void sis900_timer (struct timer_list *t );

That's it. That's the whole vibe. Returns nothing, takes one thing. Slay.

---

🎀 ARGUMENTS 🎀

• t — a struct timer_list * that's holding a pointer to the sis900 net device. So like, the timer knows which NIC it belongs to. Main character energy fr fr. 👑

---

🦋 DESCRIPTION 🦋

Every time the timer ticks, we check exactly two things, no more, no less:

1. link status — is it ON or OFF?
2. link mode — is it 10 / 100 / Full / Half?

That's the whole job. Two vibe checks per tick. Not me thinking that's lowkey iconic 🫶

---

🌈 SEE ALSO 🌈

This is literally the whole sis900 family reunion, so let me introduce everyone. The kernel file in question is ./drivers/net/ethernet/sis/sis900.c and these are all its friends:

• sis900_get_mac_addr(9)
• sis630e_get_mac_addr(9)
• sis635_get_mac_addr(9)
• sis96x_get_mac_addr(9)
• sis900_probe(9)
• sis900_mii_probe(9)
• sis900_default_phy(9)
• sis900_set_capability(9)
• read_eeprom(9)
• mdio_read(9)
• mdio_write(9)
• sis900_reset_phy(9)
• sis900_open(9)
• sis900_init_rxfilter(9)
• sis900_init_tx_ring(9)
• sis900_init_rx_ring(9)
• sis630_set_eq(9)
• sis900_check_mode(9)
• sis900_set_mode(9)
• sis900_auto_negotiate(9)
• sis900_read_mode(9)
• sis900_tx_timeout(9)
• sis900_start_xmit(9)
• sis900_interrupt(9)
• sis900_rx(9)
• sis900_finish_xmit(9)
• sis900_close(9)
• sis900_get_drvinfo(9)
• sis900_set_wol(9)
• mii_ioctl(9)
• sis900_set_config(9)
• sis900_mcast_bitnr(9)
• set_rx_mode(9)
• sis900_reset(9)
• sis900_remove(9)

All thirty-five of them. I counted. We do not leave anyone out of the group chat. 💖

---

Ngl the whole page is short and sweet — the timer's only job is the two checks above, periodt. Don't go reading more into it.

---

🧚 Okay bye bestie! This little page lives at ./drivers/net/ethernet/sis and it's dated October 2026 — that's the source/version and date sign-off, mwah 💋✨