From 811c0830eb4ca8811ed80fe40378f622b9844835 Mon Sep 17 00:00:00 2001 From: Yunsheng Lin Date: Mon, 29 Mar 2021 11:57:51 +0800 Subject: [PATCH] net: hns3: add tx send size handling for tso skb The actual size on wire for tso skb should be (gso_segs - 1) * hdr + skb->len instead of skb->len, which can be seen by user using 'ethtool -S ethX' cmd, and 'Byte Queue Limit' also use the send size stat to do the queue limiting, so add send_bytes in the desc_cb to record the actual send size for a skb. And send_bytes is only for tx desc_cb and page_offset is only for rx desc, so reuse the same space for both of them. Signed-off-by: Yunsheng Lin Signed-off-by: Huazhong Tan Signed-off-by: David S. Miller --- drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 25 ++++++++++++++++++------- drivers/net/ethernet/hisilicon/hns3/hns3_enet.h | 7 ++++++- 2 files changed, 24 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c index 2dbcd95..5e08ac9 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -694,7 +694,7 @@ void hns3_enable_vlan_filter(struct net_device *netdev, bool enable) } static int hns3_set_tso(struct sk_buff *skb, u32 *paylen_fdop_ol4cs, - u16 *mss, u32 *type_cs_vlan_tso) + u16 *mss, u32 *type_cs_vlan_tso, u32 *send_bytes) { u32 l4_offset, hdr_len; union l3_hdr_info l3; @@ -750,6 +750,8 @@ static int hns3_set_tso(struct sk_buff *skb, u32 *paylen_fdop_ol4cs, (__force __wsum)htonl(l4_paylen)); } + *send_bytes = (skb_shinfo(skb)->gso_segs - 1) * hdr_len + skb->len; + /* find the txbd field values */ *paylen_fdop_ol4cs = skb->len - hdr_len; hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_TSO_B, 1); @@ -1076,7 +1078,8 @@ static bool hns3_check_hw_tx_csum(struct sk_buff *skb) } static int hns3_fill_skb_desc(struct hns3_enet_ring *ring, - struct sk_buff *skb, struct hns3_desc *desc) + struct sk_buff *skb, struct hns3_desc *desc, + struct hns3_desc_cb *desc_cb) { u32 ol_type_vlan_len_msec = 0; u32 paylen_ol4cs = skb->len; @@ -1105,6 +1108,8 @@ static int hns3_fill_skb_desc(struct hns3_enet_ring *ring, 1); } + desc_cb->send_bytes = skb->len; + if (skb->ip_summed == CHECKSUM_PARTIAL) { u8 ol4_proto, il4_proto; @@ -1140,7 +1145,7 @@ static int hns3_fill_skb_desc(struct hns3_enet_ring *ring, } ret = hns3_set_tso(skb, &paylen_ol4cs, &mss_hw_csum, - &type_cs_vlan_tso); + &type_cs_vlan_tso, &desc_cb->send_bytes); if (unlikely(ret < 0)) { u64_stats_update_begin(&ring->syncp); ring->stats.tx_tso_err++; @@ -1553,6 +1558,7 @@ netdev_tx_t hns3_nic_net_xmit(struct sk_buff *skb, struct net_device *netdev) { struct hns3_nic_priv *priv = netdev_priv(netdev); struct hns3_enet_ring *ring = &priv->ring[skb->queue_mapping]; + struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use]; struct netdev_queue *dev_queue; int pre_ntu, next_to_use_head; bool doorbell; @@ -1580,7 +1586,8 @@ netdev_tx_t hns3_nic_net_xmit(struct sk_buff *skb, struct net_device *netdev) next_to_use_head = ring->next_to_use; - ret = hns3_fill_skb_desc(ring, skb, &ring->desc[ring->next_to_use]); + ret = hns3_fill_skb_desc(ring, skb, &ring->desc[ring->next_to_use], + desc_cb); if (unlikely(ret < 0)) goto fill_err; @@ -1600,7 +1607,7 @@ netdev_tx_t hns3_nic_net_xmit(struct sk_buff *skb, struct net_device *netdev) /* Complete translate all packets */ dev_queue = netdev_get_tx_queue(netdev, ring->queue_index); - doorbell = __netdev_tx_sent_queue(dev_queue, skb->len, + doorbell = __netdev_tx_sent_queue(dev_queue, desc_cb->send_bytes, netdev_xmit_more()); hns3_tx_doorbell(ring, ret, doorbell); @@ -2721,8 +2728,12 @@ static bool hns3_nic_reclaim_desc(struct hns3_enet_ring *ring, break; desc_cb = &ring->desc_cb[ntc]; - (*pkts) += (desc_cb->type == DESC_TYPE_SKB); - (*bytes) += desc_cb->length; + + if (desc_cb->type == DESC_TYPE_SKB) { + (*pkts)++; + (*bytes) += desc_cb->send_bytes; + } + /* desc_cb will be cleaned, after hnae3_free_buffer_detach */ hns3_free_buffer_detach(ring, ntc, budget); diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h index e44224e..daa04ae 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h @@ -298,7 +298,12 @@ struct hns3_desc_cb { /* priv data for the desc, e.g. skb when use with ip stack */ void *priv; - u32 page_offset; + + union { + u32 page_offset; /* for rx */ + u32 send_bytes; /* for tx */ + }; + u32 length; /* length of the buffer */ u16 reuse_flag; -- 2.7.4