From ceca4a5e3223dbb99c062990a64f7a8c32906674 Mon Sep 17 00:00:00 2001 From: Yunsheng Lin Date: Thu, 4 Apr 2019 16:17:53 +0800 Subject: [PATCH] net: hns3: minor optimization for datapath This patch adds a likely case for hns3_fill_desc and limits the local variables' scope as much as possible, also avoid div operation when the tqp_vector->num_tqps is one. Signed-off-by: Yunsheng Lin Signed-off-by: Peng Li Signed-off-by: Huazhong Tan Signed-off-by: David S. Miller --- .../net/ethernet/hisilicon/hns3/hns3_enet.c | 24 ++++++++++++++++--- 1 file changed, 21 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c index 21085c4bf66b..5b34d2e50b39 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -1012,7 +1012,6 @@ static int hns3_fill_desc(struct hns3_enet_ring *ring, void *priv, struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use]; struct hns3_desc *desc = &ring->desc[ring->next_to_use]; struct device *dev = ring_to_dev(ring); - u16 bdtp_fe_sc_vld_ra_ri = 0; struct skb_frag_struct *frag; unsigned int frag_buf_num; int k, sizeoflast; @@ -1080,12 +1079,30 @@ static int hns3_fill_desc(struct hns3_enet_ring *ring, void *priv, desc_cb->length = size; + if (likely(size <= HNS3_MAX_BD_SIZE)) { + u16 bdtp_fe_sc_vld_ra_ri = 0; + + desc_cb->priv = priv; + desc_cb->dma = dma; + desc_cb->type = type; + desc->addr = cpu_to_le64(dma); + desc->tx.send_size = cpu_to_le16(size); + hns3_set_txbd_baseinfo(&bdtp_fe_sc_vld_ra_ri, frag_end); + desc->tx.bdtp_fe_sc_vld_ra_ri = + cpu_to_le16(bdtp_fe_sc_vld_ra_ri); + + ring_ptr_move_fw(ring, next_to_use); + return 0; + } + frag_buf_num = hns3_tx_bd_count(size); sizeoflast = size & HNS3_TX_LAST_SIZE_M; sizeoflast = sizeoflast ? sizeoflast : HNS3_MAX_BD_SIZE; /* When frag size is bigger than hardware limit, split this frag */ for (k = 0; k < frag_buf_num; k++) { + u16 bdtp_fe_sc_vld_ra_ri = 0; + /* The txbd's baseinfo of DESC_TYPE_PAGE & DESC_TYPE_SKB */ desc_cb->priv = priv; desc_cb->dma = dma + HNS3_MAX_BD_SIZE * k; @@ -2891,7 +2908,7 @@ static int hns3_nic_common_poll(struct napi_struct *napi, int budget) struct hns3_enet_tqp_vector *tqp_vector = container_of(napi, struct hns3_enet_tqp_vector, napi); bool clean_complete = true; - int rx_budget; + int rx_budget = budget; if (unlikely(test_bit(HNS3_NIC_STATE_DOWN, &priv->state))) { napi_complete(napi); @@ -2905,7 +2922,8 @@ static int hns3_nic_common_poll(struct napi_struct *napi, int budget) hns3_clean_tx_ring(ring); /* make sure rx ring budget not smaller than 1 */ - rx_budget = max(budget / tqp_vector->num_tqps, 1); + if (tqp_vector->num_tqps > 1) + rx_budget = max(budget / tqp_vector->num_tqps, 1); hns3_for_each_ring(ring, tqp_vector->rx_group) { int rx_cleaned = hns3_clean_rx_ring(ring, rx_budget, -- 2.30.2