diff options
Diffstat (limited to 'drivers/net/ethernet/google/gve/gve_rx.c')
| -rw-r--r-- | drivers/net/ethernet/google/gve/gve_rx.c | 74 |
1 files changed, 73 insertions, 1 deletions
diff --git a/drivers/net/ethernet/google/gve/gve_rx.c b/drivers/net/ethernet/google/gve/gve_rx.c index 051a15e4f1af..3241f6ea29be 100644 --- a/drivers/net/ethernet/google/gve/gve_rx.c +++ b/drivers/net/ethernet/google/gve/gve_rx.c @@ -8,6 +8,8 @@ #include "gve_adminq.h" #include "gve_utils.h" #include <linux/etherdevice.h> +#include <linux/filter.h> +#include <net/xdp.h> static void gve_rx_free_buffer(struct device *dev, struct gve_rx_slot_page_info *page_info, @@ -591,6 +593,43 @@ static struct sk_buff *gve_rx_skb(struct gve_priv *priv, struct gve_rx_ring *rx, return skb; } +static void gve_xdp_done(struct gve_priv *priv, struct gve_rx_ring *rx, + struct xdp_buff *xdp, struct bpf_prog *xprog, + int xdp_act) +{ + struct gve_tx_ring *tx; + int tx_qid; + int err; + + switch (xdp_act) { + case XDP_ABORTED: + case XDP_DROP: + default: + break; + case XDP_TX: + tx_qid = gve_xdp_tx_queue_id(priv, rx->q_num); + tx = &priv->tx[tx_qid]; + err = gve_xdp_xmit_one(priv, tx, xdp->data, + xdp->data_end - xdp->data); + + if (unlikely(err)) { + u64_stats_update_begin(&rx->statss); + rx->xdp_tx_errors++; + u64_stats_update_end(&rx->statss); + } + break; + case XDP_REDIRECT: + u64_stats_update_begin(&rx->statss); + rx->xdp_redirect_errors++; + u64_stats_update_end(&rx->statss); + break; + } + u64_stats_update_begin(&rx->statss); + if ((u32)xdp_act < GVE_XDP_ACTIONS) + rx->xdp_actions[xdp_act]++; + u64_stats_update_end(&rx->statss); +} + #define GVE_PKTCONT_BIT_IS_SET(x) (GVE_RXF_PKT_CONT & (x)) static void gve_rx(struct gve_rx_ring *rx, netdev_features_t feat, struct gve_rx_desc *desc, u32 idx, @@ -603,9 +642,12 @@ static void gve_rx(struct gve_rx_ring *rx, netdev_features_t feat, union gve_rx_data_slot *data_slot; struct gve_priv *priv = rx->gve; struct sk_buff *skb = NULL; + struct bpf_prog *xprog; + struct xdp_buff xdp; dma_addr_t page_bus; void *va; + u16 len = frag_size; struct napi_struct *napi = &priv->ntfy_blocks[rx->ntfy_id].napi; bool is_first_frag = ctx->frag_cnt == 0; @@ -645,9 +687,35 @@ static void gve_rx(struct gve_rx_ring *rx, netdev_features_t feat, dma_sync_single_for_cpu(&priv->pdev->dev, page_bus, PAGE_SIZE, DMA_FROM_DEVICE); page_info->pad = is_first_frag ? GVE_RX_PAD : 0; + len -= page_info->pad; frag_size -= page_info->pad; - skb = gve_rx_skb(priv, rx, page_info, napi, frag_size, + xprog = READ_ONCE(priv->xdp_prog); + if (xprog && is_only_frag) { + void *old_data; + int xdp_act; + + xdp_init_buff(&xdp, rx->packet_buffer_size, &rx->xdp_rxq); + xdp_prepare_buff(&xdp, page_info->page_address + + page_info->page_offset, GVE_RX_PAD, + len, false); + old_data = xdp.data; + xdp_act = bpf_prog_run_xdp(xprog, &xdp); + if (xdp_act != XDP_PASS) { + gve_xdp_done(priv, rx, &xdp, xprog, xdp_act); + ctx->total_size += frag_size; + goto finish_ok_pkt; + } + + page_info->pad += xdp.data - old_data; + len = xdp.data_end - xdp.data; + + u64_stats_update_begin(&rx->statss); + rx->xdp_actions[XDP_PASS]++; + u64_stats_update_end(&rx->statss); + } + + skb = gve_rx_skb(priv, rx, page_info, napi, len, data_slot, is_only_frag); if (!skb) { u64_stats_update_begin(&rx->statss); @@ -773,6 +841,7 @@ static bool gve_rx_refill_buffers(struct gve_priv *priv, struct gve_rx_ring *rx) static int gve_clean_rx_done(struct gve_rx_ring *rx, int budget, netdev_features_t feat) { + u64 xdp_txs = rx->xdp_actions[XDP_TX]; struct gve_rx_ctx *ctx = &rx->ctx; struct gve_priv *priv = rx->gve; struct gve_rx_cnts cnts = {0}; @@ -820,6 +889,9 @@ static int gve_clean_rx_done(struct gve_rx_ring *rx, int budget, u64_stats_update_end(&rx->statss); } + if (xdp_txs != rx->xdp_actions[XDP_TX]) + gve_xdp_tx_flush(priv, rx->q_num); + /* restock ring slots */ if (!rx->data.raw_addressing) { /* In QPL mode buffs are refilled as the desc are processed */ |