[RFC V2 net-next 3/3] net: hns3: add ethtool support for CQE/EQE mode configuration

[Huazhong Tan <tanhuazhong@xxxxxxxxxx>]

Add support in ethtool for switching EQE/CQE mode.

Signed-off-by: Huazhong Tan <tanhuazhong@xxxxxxxxxx>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c    |  6 +++---
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.h    |  3 +++
 drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c | 18 +++++++++++++++++-
 3 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 40e65c3..98a9bd9 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -4549,9 +4549,9 @@ static void hns3_set_cq_period_mode(struct hns3_nic_priv *priv,
 	}
 }
 
-static void hns3_cq_period_mode_init(struct hns3_nic_priv *priv,
-				     enum dim_cq_period_mode tx_mode,
-				     enum dim_cq_period_mode rx_mode)
+void hns3_cq_period_mode_init(struct hns3_nic_priv *priv,
+			      enum dim_cq_period_mode tx_mode,
+			      enum dim_cq_period_mode rx_mode)
 {
 	hns3_set_cq_period_mode(priv, tx_mode, true);
 	hns3_set_cq_period_mode(priv, rx_mode, false);
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
index 8445596..b031fd0 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
@@ -666,4 +666,7 @@ void hns3_dbg_register_debugfs(const char *debugfs_dir_name);
 void hns3_dbg_unregister_debugfs(void);
 void hns3_shinfo_pack(struct skb_shared_info *shinfo, __u32 *size);
 u16 hns3_get_max_available_channels(struct hnae3_handle *h);
+void hns3_cq_period_mode_init(struct hns3_nic_priv *priv,
+			      enum dim_cq_period_mode tx_mode,
+			      enum dim_cq_period_mode rx_mode);
 #endif
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
index b9f9599..3ef9fbc 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
@@ -1159,6 +1159,11 @@ static int hns3_get_coalesce(struct net_device *netdev,
 	cmd->tx_max_coalesced_frames = tx_coal->int_ql;
 	cmd->rx_max_coalesced_frames = rx_coal->int_ql;
 
+	kernel_coal->use_cqe_mode_tx = (priv->tx_cqe_mode ==
+					DIM_CQ_PERIOD_MODE_START_FROM_CQE);
+	kernel_coal->use_cqe_mode_rx = (priv->rx_cqe_mode ==
+					DIM_CQ_PERIOD_MODE_START_FROM_CQE);
+
 	return 0;
 }
 
@@ -1328,6 +1333,8 @@ static int hns3_set_coalesce(struct net_device *netdev,
 	struct hns3_enet_coalesce *tx_coal = &priv->tx_coal;
 	struct hns3_enet_coalesce *rx_coal = &priv->rx_coal;
 	u16 queue_num = h->kinfo.num_tqps;
+	enum dim_cq_period_mode tx_mode;
+	enum dim_cq_period_mode rx_mode;
 	int ret;
 	int i;
 
@@ -1353,6 +1360,14 @@ static int hns3_set_coalesce(struct net_device *netdev,
 	for (i = 0; i < queue_num; i++)
 		hns3_set_coalesce_per_queue(netdev, cmd, i);
 
+	tx_mode = kernel_coal->use_cqe_mode_tx ?
+		  DIM_CQ_PERIOD_MODE_START_FROM_CQE :
+		  DIM_CQ_PERIOD_MODE_START_FROM_EQE;
+	rx_mode = kernel_coal->use_cqe_mode_rx ?
+		  DIM_CQ_PERIOD_MODE_START_FROM_CQE :
+		  DIM_CQ_PERIOD_MODE_START_FROM_EQE;
+	hns3_cq_period_mode_init(priv, tx_mode, rx_mode);
+
 	return 0;
 }
 
@@ -1604,7 +1619,8 @@ static int hns3_set_priv_flags(struct net_device *netdev, u32 pflags)
 				 ETHTOOL_COALESCE_USE_ADAPTIVE |	\
 				 ETHTOOL_COALESCE_RX_USECS_HIGH |	\
 				 ETHTOOL_COALESCE_TX_USECS_HIGH |	\
-				 ETHTOOL_COALESCE_MAX_FRAMES)
+				 ETHTOOL_COALESCE_MAX_FRAMES	|	\
+				 ETHTOOL_COALESCE_USE_CQE)
 
 static const struct ethtool_ops hns3vf_ethtool_ops = {
 	.supported_coalesce_params = HNS3_ETHTOOL_COALESCE,
-- 
2.7.4