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From:   Huazhong Tan <tanhuazhong@huawei.com>
To:     <davem@davemloft.net>
CC:     <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <salil.mehta@huawei.com>, <yisen.zhuang@huawei.com>,
        <linuxarm@huawei.com>, <kuba@kernel.org>,
        Huazhong Tan <tanhuazhong@huawei.com>
Subject: [PATCH V3 net-next 09/10] net: hns3: add support for EQ/CQ mode configuration
Date:   Thu, 12 Nov 2020 11:33:17 +0800
Message-ID: <1605151998-12633-10-git-send-email-tanhuazhong@huawei.com>
In-Reply-To: <1605151998-12633-1-git-send-email-tanhuazhong@huawei.com>
References: <1605151998-12633-1-git-send-email-tanhuazhong@huawei.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

For device whose version is above V3(include V3), the GL can
select EQ or CQ mode, so adds support for it.

In CQ mode, the coalesced timer will restart when the first new
completion occurs, while in EQ mode, the timer will not restart.

Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hnae3.h        |  1 +
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c    | 49 +++++++++++++++++++++-
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.h    |  8 ++++
 .../ethernet/hisilicon/hns3/hns3pf/hclge_main.c    |  1 +
 .../ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c  |  1 +
 5 files changed, 58 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hnae3.h b/drivers/net/ethernet/hisilicon/hns3/hnae3.h
index 3642740..345e8a4 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hnae3.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hnae3.h
@@ -684,6 +684,7 @@ struct hnae3_knic_private_info {
 
 	u16 int_rl_setting;
 	enum pkt_hash_types rss_type;
+	void __iomem *io_base;
 };
 
 struct hnae3_roce_private_info {
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index c30cf9e..d1243ea 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -3653,9 +3653,7 @@ static void hns3_tx_dim_work(struct work_struct *work)
 static void hns3_nic_init_dim(struct hns3_enet_tqp_vector *tqp_vector)
 {
 	INIT_WORK(&tqp_vector->rx_group.dim.work, hns3_rx_dim_work);
-	tqp_vector->rx_group.dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
 	INIT_WORK(&tqp_vector->tx_group.dim.work, hns3_tx_dim_work);
-	tqp_vector->tx_group.dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
 }
 
 static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv)
@@ -4155,6 +4153,48 @@ static void hns3_state_init(struct hnae3_handle *handle)
 	set_bit(HNAE3_PFLAG_DIM_ENABLE, &handle->supported_pflags);
 }
 
+static void hns3_set_cq_period_mode(struct hns3_nic_priv *priv,
+				    enum dim_cq_period_mode mode, bool is_tx)
+{
+	struct hnae3_ae_dev *ae_dev = pci_get_drvdata(priv->ae_handle->pdev);
+	struct hnae3_handle *handle = priv->ae_handle;
+	int i;
+
+	if (is_tx) {
+		priv->tx_cqe_mode = mode;
+
+		for (i = 0; i < priv->vector_num; i++)
+			priv->tqp_vector[i].tx_group.dim.mode = mode;
+	} else {
+		priv->rx_cqe_mode = mode;
+
+		for (i = 0; i < priv->vector_num; i++)
+			priv->tqp_vector[i].rx_group.dim.mode = mode;
+	}
+
+	/* only device version above V3(include V3), GL can switch CQ/EQ
+	 * period mode.
+	 */
+	if (ae_dev->dev_version >= HNAE3_DEVICE_VERSION_V3) {
+		u32 new_mode;
+		u64 reg;
+
+		new_mode = (mode == DIM_CQ_PERIOD_MODE_START_FROM_CQE) ?
+			HNS3_CQ_MODE_CQE : HNS3_CQ_MODE_EQE;
+		reg = is_tx ? HNS3_GL1_CQ_MODE_REG : HNS3_GL0_CQ_MODE_REG;
+
+		writel(new_mode, handle->kinfo.io_base + reg);
+	}
+}
+
+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)
+{
+	hns3_set_cq_period_mode(priv, tx_mode, true);
+	hns3_set_cq_period_mode(priv, rx_mode, false);
+}
+
 static int hns3_client_init(struct hnae3_handle *handle)
 {
 	struct pci_dev *pdev = handle->pdev;
@@ -4220,6 +4260,9 @@ static int hns3_client_init(struct hnae3_handle *handle)
 		goto out_init_ring;
 	}
 
+	hns3_cq_period_mode_init(priv, DIM_CQ_PERIOD_MODE_START_FROM_EQE,
+				 DIM_CQ_PERIOD_MODE_START_FROM_EQE);
+
 	ret = hns3_init_phy(netdev);
 	if (ret)
 		goto out_init_phy;
@@ -4580,6 +4623,8 @@ static int hns3_reset_notify_init_enet(struct hnae3_handle *handle)
 	if (ret)
 		goto err_uninit_vector;
 
+	hns3_cq_period_mode_init(priv, priv->tx_cqe_mode, priv->rx_cqe_mode);
+
 	/* the device can work without cpu rmap, only aRFS needs it */
 	ret = hns3_set_rx_cpu_rmap(netdev);
 	if (ret)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
index eb4e7ef..c6c082a 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
@@ -188,6 +188,12 @@ enum hns3_nic_state {
 
 #define HNS3_RING_EN_B				0
 
+#define HNS3_GL0_CQ_MODE_REG			0x20d00
+#define HNS3_GL1_CQ_MODE_REG			0x20d04
+#define HNS3_GL2_CQ_MODE_REG			0x20d08
+#define HNS3_CQ_MODE_EQE			1U
+#define HNS3_CQ_MODE_CQE			0U
+
 enum hns3_pkt_l2t_type {
 	HNS3_L2_TYPE_UNICAST,
 	HNS3_L2_TYPE_MULTICAST,
@@ -495,6 +501,8 @@ struct hns3_nic_priv {
 
 	unsigned long state;
 
+	enum dim_cq_period_mode tx_cqe_mode;
+	enum dim_cq_period_mode rx_cqe_mode;
 	struct hns3_enet_coalesce tx_coal;
 	struct hns3_enet_coalesce rx_coal;
 };
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 7102001..0573e68 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -1738,6 +1738,7 @@ static int hclge_vport_setup(struct hclge_vport *vport, u16 num_tqps)
 	nic->pdev = hdev->pdev;
 	nic->ae_algo = &ae_algo;
 	nic->numa_node_mask = hdev->numa_node_mask;
+	nic->kinfo.io_base = hdev->hw.io_base;
 
 	ret = hclge_knic_setup(vport, num_tqps,
 			       hdev->num_tx_desc, hdev->num_rx_desc);
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
index 71007e7..b628e52 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
@@ -515,6 +515,7 @@ static int hclgevf_set_handle_info(struct hclgevf_dev *hdev)
 	nic->pdev = hdev->pdev;
 	nic->numa_node_mask = hdev->numa_node_mask;
 	nic->flags |= HNAE3_SUPPORT_VF;
+	nic->kinfo.io_base = hdev->hw.io_base;
 
 	ret = hclgevf_knic_setup(hdev);
 	if (ret)
-- 
2.7.4