ixgbe_alloc_q_vector(9)

💅 ixgbe_alloc_q_vector(9) — the kernel API manual, but make it make sense

okay so bestie, we're in the Kernel API Manual today and this one is genuinely a little legend: ixgbe_alloc_q_vector. It does exactly one thing and it does it iconically — it sets up memory for a single interrupt vector. One. Singular. Main character energy, no ensemble cast. 🎀

---

✨ SYNOPSIS ✨

int ixgbe_alloc_q_vector (struct ixgbe_adapter *adapter , int v_count ,
int v_idx , int txr_count , int txr_idx , int xdp_count , int xdp_idx ,
int rxr_count , int rxr_idx );

like, yes, that's a lot of ints. she's thorough. we love a thorough queen. 🫶

---

🦋 ARGUMENTS 🦋

• adapter — the board private structure you're initializing. this is the whole vibe container, everything lives in here.
• v_count — how many q_vectors got allocated on adapter; it's used for ring interleaving. think of it as the seating chart, lowkey. 🪑
• v_idx — the index of this vector inside the adapter struct. her specific spot. 💅
• txr_count — total number of Tx rings to allocate. count 'em, bestie.
• txr_idx — index of the first Tx ring to allocate. where the Tx party starts. 🎉
• xdp_count — total number of XDP rings to allocate. XDP girlies rise. 🔥
• xdp_idx — index of the first XDP ring to allocate.
• rxr_count — total number of Rx rings to allocate. receiving, as always. 🙈
• rxr_idx — index of the first Rx ring to allocate.

---

🌸 DESCRIPTION 🌸

so here's the whole plot: we allocate one q_vector. that's it, that's the episode.

and if that allocation fails? we return -ENOMEM. not me getting emotional over an errno 😭 — but fr fr, that's the only drama here. allocation fails, -ENOMEM comes back, scene over. ⭐

---

👑 SEE ALSO 👑

• Kernel file ./drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c — that's where she lives, iykyk 💜
• ixgbe_cache_ring_dcb_sriov(9)
• ixgbe_cache_ring_dcb(9)
• ixgbe_cache_ring_sriov(9)
• ixgbe_cache_ring_rss(9)
• ixgbe_cache_ring_register(9)
• ixgbe_set_dcb_sriov_queues(9)
• ixgbe_set_sriov_queues(9)
• ixgbe_set_rss_queues(9)
• ixgbe_set_num_queues(9)
• ixgbe_acquire_msix_vectors(9)
• ixgbe_free_q_vector(9)
• ixgbe_alloc_q_vectors(9)
• ixgbe_free_q_vectors(9)
• ixgbe_set_interrupt_capability(9)
• ixgbe_init_interrupt_scheme(9)
• ixgbe_clear_interrupt_scheme(9)

like, that's the whole friend group right there. say hi to all seventeen of them or you're not invited to the group chat. 🧚

---

okay that's the page!! mwah 💋 this lil diva came from source/version ./drivers/net/ethernet/intel/i... and she's dated October 2026 — mark your calendars, she's timeless, periodt. 🌈🦋