From 45cf3372a56d4606fbd6e0483be31c4c819cd56c Mon Sep 17 00:00:00 2001 From: Hao Chen Date: Mon, 27 Dec 2021 19:41:39 +0800 Subject: [PATCH 166/283] net: hns3: add support to set/get tx copybreak buf size via ethtool for hns3 driver mainline inclusion from mainline-v5.17-rc1 commit e445f08af2b15035474439fbbb8649f466ad2501 category: feature bugzilla: https://gitee.com/src-openeuler/kernel/issues/I8EN3D CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e445f08af2b15035474439fbbb8649f466ad2501 ---------------------------------------------------------------------- Tx copybreak buf size is used for tx copybreak feature, the feature is used for small size packet or frag. It adds a queue based tx shared bounce buffer to memcpy the small packet when the len of xmitted skb is below tx_copybreak(value to distinguish small size and normal size), and reduce the overhead of dma map and unmap when IOMMU is on. Support setting it via ethtool --set-tunable parameter and getting it via ethtool --get-tunable parameter. Signed-off-by: Hao Chen Signed-off-by: Guangbin Huang Signed-off-by: David S. Miller Reviewed-by: Yongxin Li Signed-off-by: Junxin Chen Signed-off-by: Zheng Zengkai Signed-off-by: Xiaodong Li --- .../net/ethernet/hisilicon/hns3/hns3_enet.c | 4 +- .../net/ethernet/hisilicon/hns3/hns3_enet.h | 2 + .../ethernet/hisilicon/hns3/hns3_ethtool.c | 56 +++++++++++++++++++ 3 files changed, 60 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c index 6cf947cd96eb..363b92e6298c 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -5165,8 +5165,8 @@ static int hns3_reset_notify_uninit_enet(struct hnae3_handle *handle) return ret; } -static int hns3_reset_notify(struct hnae3_handle *handle, - enum hnae3_reset_notify_type type) +int hns3_reset_notify(struct hnae3_handle *handle, + enum hnae3_reset_notify_type type) { int ret = 0; diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h index 433422fda7b8..f889ec9fc24e 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h @@ -695,6 +695,8 @@ void hns3_set_vector_coalesce_tx_ql(struct hns3_enet_tqp_vector *tqp_vector, u32 ql_value); void hns3_request_update_promisc_mode(struct hnae3_handle *handle); +int hns3_reset_notify(struct hnae3_handle *handle, + enum hnae3_reset_notify_type type); #ifdef CONFIG_HNS3_DCB void hns3_dcbnl_setup(struct hnae3_handle *handle); diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c index f7bb9c85e243..8da002d6d0b9 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c @@ -1681,6 +1681,7 @@ static int hns3_get_tunable(struct net_device *netdev, void *data) { struct hns3_nic_priv *priv = netdev_priv(netdev); + struct hnae3_handle *h = priv->ae_handle; int ret = 0; switch (tuna->id) { @@ -1691,6 +1692,9 @@ static int hns3_get_tunable(struct net_device *netdev, case ETHTOOL_RX_COPYBREAK: *(u32 *)data = priv->rx_copybreak; break; + case ETHTOOL_TX_COPYBREAK_BUF_SIZE: + *(u32 *)data = h->kinfo.tx_spare_buf_size; + break; default: ret = -EOPNOTSUPP; break; @@ -1699,11 +1703,43 @@ static int hns3_get_tunable(struct net_device *netdev, return ret; } +static int hns3_set_tx_spare_buf_size(struct net_device *netdev, + u32 data) +{ + struct hns3_nic_priv *priv = netdev_priv(netdev); + struct hnae3_handle *h = priv->ae_handle; + int ret; + + if (hns3_nic_resetting(netdev)) + return -EBUSY; + + h->kinfo.tx_spare_buf_size = data; + + ret = hns3_reset_notify(h, HNAE3_DOWN_CLIENT); + if (ret) + return ret; + + ret = hns3_reset_notify(h, HNAE3_UNINIT_CLIENT); + if (ret) + return ret; + + ret = hns3_reset_notify(h, HNAE3_INIT_CLIENT); + if (ret) + return ret; + + ret = hns3_reset_notify(h, HNAE3_UP_CLIENT); + if (ret) + hns3_reset_notify(h, HNAE3_UNINIT_CLIENT); + + return ret; +} + static int hns3_set_tunable(struct net_device *netdev, const struct ethtool_tunable *tuna, const void *data) { struct hns3_nic_priv *priv = netdev_priv(netdev); + u32 old_tx_spare_buf_size, new_tx_spare_buf_size; struct hnae3_handle *h = priv->ae_handle; int i, ret = 0; @@ -1721,6 +1757,26 @@ static int hns3_set_tunable(struct net_device *netdev, for (i = h->kinfo.num_tqps; i < h->kinfo.num_tqps * 2; i++) priv->ring[i].rx_copybreak = priv->rx_copybreak; + break; + case ETHTOOL_TX_COPYBREAK_BUF_SIZE: + old_tx_spare_buf_size = h->kinfo.tx_spare_buf_size; + new_tx_spare_buf_size = *(u32 *)data; + ret = hns3_set_tx_spare_buf_size(netdev, new_tx_spare_buf_size); + if (ret) { + int ret1; + + netdev_warn(netdev, + "change tx spare buf size fail, revert to old value\n"); + ret1 = hns3_set_tx_spare_buf_size(netdev, + old_tx_spare_buf_size); + if (ret1) { + netdev_err(netdev, + "revert to old tx spare buf size fail\n"); + return ret1; + } + + return ret; + } break; default: ret = -EOPNOTSUPP; -- 2.34.1