STRUCT NFP_NFD3_TX_BUF(9)

✨ NAME ✨

Okay so bestie, we're deep in the Kernel API Manual and the main character is struct nfp_nfd3_tx_buf(9) — literally the software TX buffer descriptor 💅

It's giving "small struct, big job" energy fr fr 🫶

✨ SYNOPSIS ✨

       struct nfp_nfd3_tx_buf {
           union {
             struct sk_buff *skb;
             void *frag;
             struct xdp_buff *xdp;
           };
           dma_addr_t dma_addr;
           union {
             struct {
               short int fidx;
               u16 pkt_cnt;
             };
             struct {
               bool is_xsk_tx;
             };
           };
           u32 real_len;
        };

🌸 Members 🌸

• {unnamed_union} — anonymous 🫧
  • skb — normal ring, sk_buff associated with this buffer
  • frag — XDP ring, page frag associated with this buffer
  • xdp — XSK buffer pool handle (for AF_XDP)
• dma_addr — DMA mapping address of the buffer
• {unnamed_union} — anonymous 🫧
  • {unnamed_struct} — anonymous
    • fidx — Fragment index (-1 for the head and [0..nr_frags-1] for frags)
    • pkt_cnt — Number of packets to be produced out of the skb associated with this buffer (valid only on the head's buffer). Will be 1 for all non-TSO packets.
  • {unnamed_struct} — anonymous
    • is_xsk_tx — Flag if buffer is a RX buffer after a XDP_TX action and not a buffer from the TX queue (for AF_XDP).
• real_len — Number of bytes which to be produced out of the skb (valid only on the head's buffer). Equal to skb->len for non-TSO packets.

🌈 SEE ALSO 🌈

Kernel file ./drivers/net/ethernet/netronome/nfp/nfd3/nfd3.h — go read it, iykyk 👑

And that's the whole vibe, bestie 💖 this page's source/version footer energy is ./drivers/net/ethernet/netrono..., dated October 2026, all under struct nfp_nfd3_tx_buf(9) — slay, bye 🎀