Merge branch 'net-hns3-updates-for-next'

Huazhong Tan says:

====================
net: hns3: updates for -next

There are several updates relating to the interrupt coalesce for
the HNS3 ethernet driver.

   based on the frame quantity).
   a fixed value in code.
   based on the gap time).
   its new usage.

change log:
V4 - remove #5~#10 from this series, which needs more discussion.
V3 - fix a typo error in #1 reported by Jakub Kicinski.
     rewrite #9 commit log.
     remove #11 from this series.
V2 - reorder #2 & #3 to fix compiler error.
     fix some checkpatch warnings in #10 & #11.

previous version:
V3: https://patchwork.ozlabs.org/project/netdev/cover/1605151998-12633-1-git-send-email-tanhuazhong@huawei.com/
V2: https://patchwork.ozlabs.org/project/netdev/cover/1604892159-19990-1-git-send-email-tanhuazhong@huawei.com/
V1: https://patchwork.ozlabs.org/project/netdev/cover/1604730681-32559-1-git-send-email-tanhuazhong@huawei.com/
====================

Link: https://lore.kernel.org/r/1605514854-11205-1-git-send-email-tanhuazhong@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/hisilicon/hns3/hnae3.h

@@ -278,6 +278,7 @@ struct hnae3_dev_specs {
 	u16 rss_ind_tbl_size;
 	u16 rss_key_size;
 	u16 int_ql_max; /* max value of interrupt coalesce based on INT_QL */
+	u16 max_int_gl; /* max value of interrupt coalesce based on INT_GL */
 	u8 max_non_tso_bd_num; /* max BD number of one non-TSO packet */
 };
 

drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c

@@ -349,6 +349,7 @@ static void hns3_dbg_dev_specs(struct hnae3_handle *h)
 	dev_info(priv->dev, "Desc num per RX queue: %u\n", kinfo->num_rx_desc);
 	dev_info(priv->dev, "Total number of enabled TCs: %u\n", kinfo->num_tc);
 	dev_info(priv->dev, "MAX INT QL: %u\n", dev_specs->int_ql_max);
+	dev_info(priv->dev, "MAX INT GL: %u\n", dev_specs->max_int_gl);
 }
 
 static ssize_t hns3_dbg_cmd_read(struct file *filp, char __user *buffer,

drivers/net/ethernet/hisilicon/hns3/hns3_enet.c

@@ -211,8 +211,8 @@ void hns3_set_vector_coalesce_rl(struct hns3_enet_tqp_vector *tqp_vector,
 	 * GL and RL(Rate Limiter) are 2 ways to acheive interrupt coalescing
 	 */
 
-	if (rl_reg > 0 && !tqp_vector->tx_group.coal.gl_adapt_enable &&
-	    !tqp_vector->rx_group.coal.gl_adapt_enable)
+	if (rl_reg > 0 && !tqp_vector->tx_group.coal.adapt_enable &&
+	    !tqp_vector->rx_group.coal.adapt_enable)
 		/* According to the hardware, the range of rl_reg is
 		 * 0-59 and the unit is 4.
 		 */
@@ -224,48 +224,99 @@ void hns3_set_vector_coalesce_rl(struct hns3_enet_tqp_vector *tqp_vector,
 void hns3_set_vector_coalesce_rx_gl(struct hns3_enet_tqp_vector *tqp_vector,
 				    u32 gl_value)
 {
-	u32 rx_gl_reg = hns3_gl_usec_to_reg(gl_value);
+	u32 new_val;
 
-	writel(rx_gl_reg, tqp_vector->mask_addr + HNS3_VECTOR_GL0_OFFSET);
+	if (tqp_vector->rx_group.coal.unit_1us)
+		new_val = gl_value | HNS3_INT_GL_1US;
+	else
+		new_val = hns3_gl_usec_to_reg(gl_value);
+
+	writel(new_val, tqp_vector->mask_addr + HNS3_VECTOR_GL0_OFFSET);
 }
 
 void hns3_set_vector_coalesce_tx_gl(struct hns3_enet_tqp_vector *tqp_vector,
 				    u32 gl_value)
 {
-	u32 tx_gl_reg = hns3_gl_usec_to_reg(gl_value);
+	u32 new_val;
+
+	if (tqp_vector->tx_group.coal.unit_1us)
+		new_val = gl_value | HNS3_INT_GL_1US;
+	else
+		new_val = hns3_gl_usec_to_reg(gl_value);
+
+	writel(new_val, tqp_vector->mask_addr + HNS3_VECTOR_GL1_OFFSET);
+}
+
+void hns3_set_vector_coalesce_tx_ql(struct hns3_enet_tqp_vector *tqp_vector,
+				    u32 ql_value)
+{
+	writel(ql_value, tqp_vector->mask_addr + HNS3_VECTOR_TX_QL_OFFSET);
+}
 
-	writel(tx_gl_reg, tqp_vector->mask_addr + HNS3_VECTOR_GL1_OFFSET);
+void hns3_set_vector_coalesce_rx_ql(struct hns3_enet_tqp_vector *tqp_vector,
+				    u32 ql_value)
+{
+	writel(ql_value, tqp_vector->mask_addr + HNS3_VECTOR_RX_QL_OFFSET);
 }
 
-static void hns3_vector_gl_rl_init(struct hns3_enet_tqp_vector *tqp_vector,
-				   struct hns3_nic_priv *priv)
+static void hns3_vector_coalesce_init(struct hns3_enet_tqp_vector *tqp_vector,
+				      struct hns3_nic_priv *priv)
 {
+	struct hnae3_ae_dev *ae_dev = pci_get_drvdata(priv->ae_handle->pdev);
+	struct hns3_enet_coalesce *tx_coal = &tqp_vector->tx_group.coal;
+	struct hns3_enet_coalesce *rx_coal = &tqp_vector->rx_group.coal;
+
 	/* initialize the configuration for interrupt coalescing.
 	 * 1. GL (Interrupt Gap Limiter)
 	 * 2. RL (Interrupt Rate Limiter)
+	 * 3. QL (Interrupt Quantity Limiter)
 	 *
 	 * Default: enable interrupt coalescing self-adaptive and GL
 	 */
-	tqp_vector->tx_group.coal.gl_adapt_enable = 1;
-	tqp_vector->rx_group.coal.gl_adapt_enable = 1;
+	tx_coal->adapt_enable = 1;
+	rx_coal->adapt_enable = 1;
+
+	tx_coal->int_gl = HNS3_INT_GL_50K;
+	rx_coal->int_gl = HNS3_INT_GL_50K;
 
-	tqp_vector->tx_group.coal.int_gl = HNS3_INT_GL_50K;
-	tqp_vector->rx_group.coal.int_gl = HNS3_INT_GL_50K;
+	rx_coal->flow_level = HNS3_FLOW_LOW;
+	tx_coal->flow_level = HNS3_FLOW_LOW;
+
+	/* device version above V3(include V3), GL can configure 1us
+	 * unit, so uses 1us unit.
+	 */
+	if (ae_dev->dev_version >= HNAE3_DEVICE_VERSION_V3) {
+		tx_coal->unit_1us = 1;
+		rx_coal->unit_1us = 1;
+	}
 
-	tqp_vector->rx_group.coal.flow_level = HNS3_FLOW_LOW;
-	tqp_vector->tx_group.coal.flow_level = HNS3_FLOW_LOW;
+	if (ae_dev->dev_specs.int_ql_max) {
+		tx_coal->ql_enable = 1;
+		rx_coal->ql_enable = 1;
+		tx_coal->int_ql_max = ae_dev->dev_specs.int_ql_max;
+		rx_coal->int_ql_max = ae_dev->dev_specs.int_ql_max;
+		tx_coal->int_ql = HNS3_INT_QL_DEFAULT_CFG;
+		rx_coal->int_ql = HNS3_INT_QL_DEFAULT_CFG;
+	}
 }
 
-static void hns3_vector_gl_rl_init_hw(struct hns3_enet_tqp_vector *tqp_vector,
-				      struct hns3_nic_priv *priv)
+static void
+hns3_vector_coalesce_init_hw(struct hns3_enet_tqp_vector *tqp_vector,
+			     struct hns3_nic_priv *priv)
 {
+	struct hns3_enet_coalesce *tx_coal = &tqp_vector->tx_group.coal;
+	struct hns3_enet_coalesce *rx_coal = &tqp_vector->rx_group.coal;
 	struct hnae3_handle *h = priv->ae_handle;
 
-	hns3_set_vector_coalesce_tx_gl(tqp_vector,
-				       tqp_vector->tx_group.coal.int_gl);
-	hns3_set_vector_coalesce_rx_gl(tqp_vector,
-				       tqp_vector->rx_group.coal.int_gl);
+	hns3_set_vector_coalesce_tx_gl(tqp_vector, tx_coal->int_gl);
+	hns3_set_vector_coalesce_rx_gl(tqp_vector, rx_coal->int_gl);
 	hns3_set_vector_coalesce_rl(tqp_vector, h->kinfo.int_rl_setting);
+
+	if (tx_coal->ql_enable)
+		hns3_set_vector_coalesce_tx_ql(tqp_vector, tx_coal->int_ql);
+
+	if (rx_coal->ql_enable)
+		hns3_set_vector_coalesce_rx_ql(tqp_vector, rx_coal->int_ql);
 }
 
 static int hns3_nic_set_real_num_queue(struct net_device *netdev)
@@ -3333,14 +3384,14 @@ static void hns3_update_new_int_gl(struct hns3_enet_tqp_vector *tqp_vector)
 			tqp_vector->last_jiffies + msecs_to_jiffies(1000)))
 		return;
 
-	if (rx_group->coal.gl_adapt_enable) {
+	if (rx_group->coal.adapt_enable) {
 		rx_update = hns3_get_new_int_gl(rx_group);
 		if (rx_update)
 			hns3_set_vector_coalesce_rx_gl(tqp_vector,
 						       rx_group->coal.int_gl);
 	}
 
-	if (tx_group->coal.gl_adapt_enable) {
+	if (tx_group->coal.adapt_enable) {
 		tx_update = hns3_get_new_int_gl(tx_group);
 		if (tx_update)
 			hns3_set_vector_coalesce_tx_gl(tqp_vector,
@@ -3536,7 +3587,7 @@ static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv)
 
 	for (i = 0; i < priv->vector_num; i++) {
 		tqp_vector = &priv->tqp_vector[i];
-		hns3_vector_gl_rl_init_hw(tqp_vector, priv);
+		hns3_vector_coalesce_init_hw(tqp_vector, priv);
 		tqp_vector->num_tqps = 0;
 	}
 
@@ -3632,7 +3683,7 @@ static int hns3_nic_alloc_vector_data(struct hns3_nic_priv *priv)
 		tqp_vector->idx = i;
 		tqp_vector->mask_addr = vector[i].io_addr;
 		tqp_vector->vector_irq = vector[i].vector;
-		hns3_vector_gl_rl_init(tqp_vector, priv);
+		hns3_vector_coalesce_init(tqp_vector, priv);
 	}
 
 out:

drivers/net/ethernet/hisilicon/hns3/hns3_enet.h

@@ -181,6 +181,8 @@ enum hns3_nic_state {
 #define HNS3_VECTOR_GL2_OFFSET			0x300
 #define HNS3_VECTOR_RL_OFFSET			0x900
 #define HNS3_VECTOR_RL_EN_B			6
+#define HNS3_VECTOR_TX_QL_OFFSET		0xe00
+#define HNS3_VECTOR_RX_QL_OFFSET		0xf00
 
 #define HNS3_RING_EN_B				0
 
@@ -418,18 +420,25 @@ enum hns3_flow_level_range {
 	HNS3_FLOW_ULTRA = 3,
 };
 
-#define HNS3_INT_GL_MAX			0x1FE0
 #define HNS3_INT_GL_50K			0x0014
 #define HNS3_INT_GL_20K			0x0032
 #define HNS3_INT_GL_18K			0x0036
 #define HNS3_INT_GL_8K			0x007C
 
+#define HNS3_INT_GL_1US			BIT(31)
+
 #define HNS3_INT_RL_MAX			0x00EC
 #define HNS3_INT_RL_ENABLE_MASK		0x40
 
+#define HNS3_INT_QL_DEFAULT_CFG		0x20
+
 struct hns3_enet_coalesce {
 	u16 int_gl;
-	u8 gl_adapt_enable;
+	u16 int_ql;
+	u16 int_ql_max;
+	u8 adapt_enable:1;
+	u8 ql_enable:1;
+	u8 unit_1us:1;
 	enum hns3_flow_level_range flow_level;
 };
 
@@ -595,6 +604,10 @@ void hns3_set_vector_coalesce_tx_gl(struct hns3_enet_tqp_vector *tqp_vector,
 				    u32 gl_value);
 void hns3_set_vector_coalesce_rl(struct hns3_enet_tqp_vector *tqp_vector,
 				 u32 rl_value);
+void hns3_set_vector_coalesce_rx_ql(struct hns3_enet_tqp_vector *tqp_vector,
+				    u32 ql_value);
+void hns3_set_vector_coalesce_tx_ql(struct hns3_enet_tqp_vector *tqp_vector,
+				    u32 ql_value);
 
 void hns3_enable_vlan_filter(struct net_device *netdev, bool enable);
 void hns3_request_update_promisc_mode(struct hnae3_handle *handle);

drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c

@@ -1105,16 +1105,19 @@ static int hns3_get_coalesce_per_queue(struct net_device *netdev, u32 queue,
 	rx_vector = priv->ring[queue_num + queue].tqp_vector;
 
 	cmd->use_adaptive_tx_coalesce =
-			tx_vector->tx_group.coal.gl_adapt_enable;
+			tx_vector->tx_group.coal.adapt_enable;
 	cmd->use_adaptive_rx_coalesce =
-			rx_vector->rx_group.coal.gl_adapt_enable;
+			rx_vector->rx_group.coal.adapt_enable;
 
 	cmd->tx_coalesce_usecs = tx_vector->tx_group.coal.int_gl;
 	cmd->rx_coalesce_usecs = rx_vector->rx_group.coal.int_gl;
 
 	cmd->tx_coalesce_usecs_high = h->kinfo.int_rl_setting;
 	cmd->rx_coalesce_usecs_high = h->kinfo.int_rl_setting;
 
+	cmd->tx_max_coalesced_frames = tx_vector->tx_group.coal.int_ql;
+	cmd->rx_max_coalesced_frames = rx_vector->rx_group.coal.int_ql;
+
 	return 0;
 }
 
@@ -1127,22 +1130,30 @@ static int hns3_get_coalesce(struct net_device *netdev,
 static int hns3_check_gl_coalesce_para(struct net_device *netdev,
 				       struct ethtool_coalesce *cmd)
 {
+	struct hnae3_handle *handle = hns3_get_handle(netdev);
+	struct hnae3_ae_dev *ae_dev = pci_get_drvdata(handle->pdev);
 	u32 rx_gl, tx_gl;
 
-	if (cmd->rx_coalesce_usecs > HNS3_INT_GL_MAX) {
+	if (cmd->rx_coalesce_usecs > ae_dev->dev_specs.max_int_gl) {
 		netdev_err(netdev,
-			   "Invalid rx-usecs value, rx-usecs range is 0-%d\n",
-			   HNS3_INT_GL_MAX);
+			   "invalid rx-usecs value, rx-usecs range is 0-%u\n",
+			   ae_dev->dev_specs.max_int_gl);
 		return -EINVAL;
 	}
 
-	if (cmd->tx_coalesce_usecs > HNS3_INT_GL_MAX) {
+	if (cmd->tx_coalesce_usecs > ae_dev->dev_specs.max_int_gl) {
 		netdev_err(netdev,
-			   "Invalid tx-usecs value, tx-usecs range is 0-%d\n",
-			   HNS3_INT_GL_MAX);
+			   "invalid tx-usecs value, tx-usecs range is 0-%u\n",
+			   ae_dev->dev_specs.max_int_gl);
 		return -EINVAL;
 	}
 
+	/* device version above V3(include V3), GL uses 1us unit,
+	 * so the round down is not needed.
+	 */
+	if (ae_dev->dev_version >= HNAE3_DEVICE_VERSION_V3)
+		return 0;
+
 	rx_gl = hns3_gl_round_down(cmd->rx_coalesce_usecs);
 	if (rx_gl != cmd->rx_coalesce_usecs) {
 		netdev_info(netdev,
@@ -1188,6 +1199,29 @@ static int hns3_check_rl_coalesce_para(struct net_device *netdev,
 	return 0;
 }
 
+static int hns3_check_ql_coalesce_param(struct net_device *netdev,
+					struct ethtool_coalesce *cmd)
+{
+	struct hnae3_handle *handle = hns3_get_handle(netdev);
+	struct hnae3_ae_dev *ae_dev = pci_get_drvdata(handle->pdev);
+
+	if ((cmd->tx_max_coalesced_frames || cmd->rx_max_coalesced_frames) &&
+	    !ae_dev->dev_specs.int_ql_max) {
+		netdev_err(netdev, "coalesced frames is not supported\n");
+		return -EOPNOTSUPP;
+	}
+
+	if (cmd->tx_max_coalesced_frames > ae_dev->dev_specs.int_ql_max ||
+	    cmd->rx_max_coalesced_frames > ae_dev->dev_specs.int_ql_max) {
+		netdev_err(netdev,
+			   "invalid coalesced_frames value, range is 0-%u\n",
+			   ae_dev->dev_specs.int_ql_max);
+		return -ERANGE;
+	}
+
+	return 0;
+}
+
 static int hns3_check_coalesce_para(struct net_device *netdev,
 				    struct ethtool_coalesce *cmd)
 {
@@ -1207,6 +1241,10 @@ static int hns3_check_coalesce_para(struct net_device *netdev,
 		return ret;
 	}
 
+	ret = hns3_check_ql_coalesce_param(netdev, cmd);
+	if (ret)
+		return ret;
+
 	if (cmd->use_adaptive_tx_coalesce == 1 ||
 	    cmd->use_adaptive_rx_coalesce == 1) {
 		netdev_info(netdev,
@@ -1230,21 +1268,31 @@ static void hns3_set_coalesce_per_queue(struct net_device *netdev,
 	tx_vector = priv->ring[queue].tqp_vector;
 	rx_vector = priv->ring[queue_num + queue].tqp_vector;
 
-	tx_vector->tx_group.coal.gl_adapt_enable =
+	tx_vector->tx_group.coal.adapt_enable =
 				cmd->use_adaptive_tx_coalesce;
-	rx_vector->rx_group.coal.gl_adapt_enable =
+	rx_vector->rx_group.coal.adapt_enable =
 				cmd->use_adaptive_rx_coalesce;
 
 	tx_vector->tx_group.coal.int_gl = cmd->tx_coalesce_usecs;
 	rx_vector->rx_group.coal.int_gl = cmd->rx_coalesce_usecs;
 
+	tx_vector->tx_group.coal.int_ql = cmd->tx_max_coalesced_frames;
+	rx_vector->rx_group.coal.int_ql = cmd->rx_max_coalesced_frames;
+
 	hns3_set_vector_coalesce_tx_gl(tx_vector,
 				       tx_vector->tx_group.coal.int_gl);
 	hns3_set_vector_coalesce_rx_gl(rx_vector,
 				       rx_vector->rx_group.coal.int_gl);
 
 	hns3_set_vector_coalesce_rl(tx_vector, h->kinfo.int_rl_setting);
 	hns3_set_vector_coalesce_rl(rx_vector, h->kinfo.int_rl_setting);
+
+	if (tx_vector->tx_group.coal.ql_enable)
+		hns3_set_vector_coalesce_tx_ql(tx_vector,
+					       tx_vector->tx_group.coal.int_ql);
+	if (rx_vector->rx_group.coal.ql_enable)
+		hns3_set_vector_coalesce_rx_ql(rx_vector,
+					       rx_vector->rx_group.coal.int_ql);
 }
 
 static int hns3_set_coalesce(struct net_device *netdev,
@@ -1471,7 +1519,8 @@ static int hns3_get_module_eeprom(struct net_device *netdev,
 #define HNS3_ETHTOOL_COALESCE	(ETHTOOL_COALESCE_USECS |		\
 				 ETHTOOL_COALESCE_USE_ADAPTIVE |	\
 				 ETHTOOL_COALESCE_RX_USECS_HIGH |	\
-				 ETHTOOL_COALESCE_TX_USECS_HIGH)
+				 ETHTOOL_COALESCE_TX_USECS_HIGH |	\
+				 ETHTOOL_COALESCE_MAX_FRAMES)
 
 static const struct ethtool_ops hns3vf_ethtool_ops = {
 	.supported_coalesce_params = HNS3_ETHTOOL_COALESCE,

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h

@@ -1103,6 +1103,14 @@ struct hclge_dev_specs_0_cmd {
 	__le32 max_tm_rate;
 };
 
+#define HCLGE_DEF_MAX_INT_GL		0x1FE0U
+
+struct hclge_dev_specs_1_cmd {
+	__le32 rsv0;
+	__le16 max_int_gl;
+	u8 rsv1[18];
+};
+
 int hclge_cmd_init(struct hclge_dev *hdev);
 static inline void hclge_write_reg(void __iomem *base, u32 reg, u32 value)
 {