diff options
| -rw-r--r-- | drivers/net/ethernet/hisilicon/hibmcge/hbg_txrx.c | 47 |
1 files changed, 37 insertions, 10 deletions
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_txrx.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_txrx.c index 5f2e48f1dd25..ea691d564161 100644 --- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_txrx.c +++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_txrx.c @@ -377,7 +377,8 @@ static int hbg_rx_fill_one_buffer(struct hbg_priv *priv) struct hbg_buffer *buffer; int ret; - if (hbg_queue_is_full(ring->ntc, ring->ntu, ring)) + if (hbg_queue_is_full(ring->ntc, ring->ntu, ring) || + hbg_fifo_is_full(priv, ring->dir)) return 0; buffer = &ring->queue[ring->ntu]; @@ -396,6 +397,26 @@ static int hbg_rx_fill_one_buffer(struct hbg_priv *priv) return 0; } +static int hbg_rx_fill_buffers(struct hbg_priv *priv) +{ + u32 remained = hbg_hw_get_fifo_used_num(priv, HBG_DIR_RX); + u32 max_count = priv->dev_specs.rx_fifo_num; + u32 refill_count; + int ret; + + if (unlikely(remained >= max_count)) + return 0; + + refill_count = max_count - remained; + while (refill_count--) { + ret = hbg_rx_fill_one_buffer(priv); + if (unlikely(ret)) + break; + } + + return ret; +} + static bool hbg_sync_data_from_hw(struct hbg_priv *priv, struct hbg_buffer *buffer) { @@ -420,6 +441,7 @@ static int hbg_napi_rx_poll(struct napi_struct *napi, int budget) u32 packet_done = 0; u32 pkt_len; + hbg_rx_fill_buffers(priv); while (packet_done < budget) { if (unlikely(hbg_queue_is_empty(ring->ntc, ring->ntu, ring))) break; @@ -497,6 +519,16 @@ static int hbg_ring_init(struct hbg_priv *priv, struct hbg_ring *ring, u32 i, len; len = hbg_get_spec_fifo_max_num(priv, dir) + 1; + /* To improve receiving performance under high-stress scenarios, + * in the `hbg_napi_rx_poll()`, we first use the other half of + * the buffer to receive packets from the hardware via the + * `hbg_rx_fill_buffers()`, and then process the packets in the + * original half of the buffer to avoid packet loss caused by + * hardware overflow as much as possible. + */ + if (dir == HBG_DIR_RX) + len += hbg_get_spec_fifo_max_num(priv, dir); + ring->queue = dma_alloc_coherent(&priv->pdev->dev, len * sizeof(*ring->queue), &ring->queue_dma, GFP_KERNEL); @@ -545,21 +577,16 @@ static int hbg_tx_ring_init(struct hbg_priv *priv) static int hbg_rx_ring_init(struct hbg_priv *priv) { int ret; - u32 i; ret = hbg_ring_init(priv, &priv->rx_ring, hbg_napi_rx_poll, HBG_DIR_RX); if (ret) return ret; - for (i = 0; i < priv->rx_ring.len - 1; i++) { - ret = hbg_rx_fill_one_buffer(priv); - if (ret) { - hbg_ring_uninit(&priv->rx_ring); - return ret; - } - } + ret = hbg_rx_fill_buffers(priv); + if (ret) + hbg_ring_uninit(&priv->rx_ring); - return 0; + return ret; } int hbg_txrx_init(struct hbg_priv *priv) |