[PATCH net-next 0/4] net: hns3: add aRFS feature and fix FEC bugs for HNS3 driver

[PATCH net-next 0/4] net: hns3: add aRFS feature and fix FEC bugs for HNS3 driver

[Huazhong Tan]

This patchset adds some new features support and fixes some bugs:
[Patch 1/4 - 3/4] adds support for aRFS
[Patch 4/4] fix FEC configuration issue

Jian Shen (4):
  net: hns3: initialize CPU reverse mapping
  net: hns3: refine the flow director handle
  net: hns3: add aRFS support for PF
  net: hns3: fix for FEC configuration

 drivers/net/ethernet/hisilicon/hns3/hnae3.h        |   4 +
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c    | 108 +++++--
 .../ethernet/hisilicon/hns3/hns3pf/hclge_main.c    | 336 +++++++++++++++++++--
 .../ethernet/hisilicon/hns3/hns3pf/hclge_main.h    |  16 +
 4 files changed, 404 insertions(+), 60 deletions(-)

-- 
2.7.4

[PATCH net-next 1/4] net: hns3: initialize CPU reverse mapping

[Huazhong Tan]

From: Jian Shen <shenjian15@huawei.com>

Allocate CPU rmap and add entry for each irq. CPU rmap is
used in aRFS to get the queue number of the rx completion
interrupts.

In additional, remove the calling of
irq_set_affinity_notifier() in hns3_nic_init_irq(), because
we have registered notifier in irq_cpu_rmap_add() for each
vector, otherwise it may cause use-after-free issue.

Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 77 +++++++++++++++----------
 1 file changed, 48 insertions(+), 29 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 196a3d7..b2be424 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -4,6 +4,9 @@
 #include <linux/dma-mapping.h>
 #include <linux/etherdevice.h>
 #include <linux/interrupt.h>
+#ifdef CONFIG_RFS_ACCEL
+#include <linux/cpu_rmap.h>
+#endif
 #include <linux/if_vlan.h>
 #include <linux/ip.h>
 #include <linux/ipv6.h>
@@ -79,23 +82,6 @@ static irqreturn_t hns3_irq_handle(int irq, void *vector)
 	return IRQ_HANDLED;
 }
 
-/* This callback function is used to set affinity changes to the irq affinity
- * masks when the irq_set_affinity_notifier function is used.
- */
-static void hns3_nic_irq_affinity_notify(struct irq_affinity_notify *notify,
-					 const cpumask_t *mask)
-{
-	struct hns3_enet_tqp_vector *tqp_vectors =
-		container_of(notify, struct hns3_enet_tqp_vector,
-			     affinity_notify);
-
-	tqp_vectors->affinity_mask = *mask;
-}
-
-static void hns3_nic_irq_affinity_release(struct kref *ref)
-{
-}
-
 static void hns3_nic_uninit_irq(struct hns3_nic_priv *priv)
 {
 	struct hns3_enet_tqp_vector *tqp_vectors;
@@ -107,8 +93,7 @@ static void hns3_nic_uninit_irq(struct hns3_nic_priv *priv)
 		if (tqp_vectors->irq_init_flag != HNS3_VECTOR_INITED)
 			continue;
 
-		/* clear the affinity notifier and affinity mask */
-		irq_set_affinity_notifier(tqp_vectors->vector_irq, NULL);
+		/* clear the affinity mask */
 		irq_set_affinity_hint(tqp_vectors->vector_irq, NULL);
 
 		/* release the irq resource */
@@ -161,12 +146,6 @@ static int hns3_nic_init_irq(struct hns3_nic_priv *priv)
 			return ret;
 		}
 
-		tqp_vectors->affinity_notify.notify =
-					hns3_nic_irq_affinity_notify;
-		tqp_vectors->affinity_notify.release =
-					hns3_nic_irq_affinity_release;
-		irq_set_affinity_notifier(tqp_vectors->vector_irq,
-					  &tqp_vectors->affinity_notify);
 		irq_set_affinity_hint(tqp_vectors->vector_irq,
 				      &tqp_vectors->affinity_mask);
 
@@ -340,6 +319,40 @@ static void hns3_tqp_disable(struct hnae3_queue *tqp)
 	hns3_write_dev(tqp, HNS3_RING_EN_REG, rcb_reg);
 }
 
+static void hns3_free_rx_cpu_rmap(struct net_device *netdev)
+{
+#ifdef CONFIG_RFS_ACCEL
+	free_irq_cpu_rmap(netdev->rx_cpu_rmap);
+	netdev->rx_cpu_rmap = NULL;
+#endif
+}
+
+static int hns3_set_rx_cpu_rmap(struct net_device *netdev)
+{
+#ifdef CONFIG_RFS_ACCEL
+	struct hns3_nic_priv *priv = netdev_priv(netdev);
+	struct hns3_enet_tqp_vector *tqp_vector;
+	int i, ret;
+
+	if (!netdev->rx_cpu_rmap) {
+		netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(priv->vector_num);
+		if (!netdev->rx_cpu_rmap)
+			return -ENOMEM;
+	}
+
+	for (i = 0; i < priv->vector_num; i++) {
+		tqp_vector = &priv->tqp_vector[i];
+		ret = irq_cpu_rmap_add(netdev->rx_cpu_rmap,
+				       tqp_vector->vector_irq);
+		if (ret) {
+			hns3_free_rx_cpu_rmap(netdev);
+			return ret;
+		}
+	}
+#endif
+	return 0;
+}
+
 static int hns3_nic_net_up(struct net_device *netdev)
 {
 	struct hns3_nic_priv *priv = netdev_priv(netdev);
@@ -351,11 +364,16 @@ static int hns3_nic_net_up(struct net_device *netdev)
 	if (ret)
 		return ret;
 
+	/* the device can work without cpu rmap, only aRFS needs it */
+	ret = hns3_set_rx_cpu_rmap(netdev);
+	if (ret)
+		netdev_warn(netdev, "set rx cpu rmap fail, ret=%d!\n", ret);
+
 	/* get irq resource for all vectors */
 	ret = hns3_nic_init_irq(priv);
 	if (ret) {
 		netdev_err(netdev, "hns init irq failed! ret=%d\n", ret);
-		return ret;
+		goto free_rmap;
 	}
 
 	clear_bit(HNS3_NIC_STATE_DOWN, &priv->state);
@@ -384,7 +402,8 @@ static int hns3_nic_net_up(struct net_device *netdev)
 		hns3_vector_disable(&priv->tqp_vector[j]);
 
 	hns3_nic_uninit_irq(priv);
-
+free_rmap:
+	hns3_free_rx_cpu_rmap(netdev);
 	return ret;
 }
 
@@ -467,6 +486,8 @@ static void hns3_nic_net_down(struct net_device *netdev)
 	if (ops->stop)
 		ops->stop(priv->ae_handle);
 
+	hns3_free_rx_cpu_rmap(netdev);
+
 	/* free irq resources */
 	hns3_nic_uninit_irq(priv);
 
@@ -3331,8 +3352,6 @@ static void hns3_nic_uninit_vector_data(struct hns3_nic_priv *priv)
 		hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
 
 		if (tqp_vector->irq_init_flag == HNS3_VECTOR_INITED) {
-			irq_set_affinity_notifier(tqp_vector->vector_irq,
-						  NULL);
 			irq_set_affinity_hint(tqp_vector->vector_irq, NULL);
 			free_irq(tqp_vector->vector_irq, tqp_vector);
 			tqp_vector->irq_init_flag = HNS3_VECTOR_NOT_INITED;
-- 
2.7.4

[PATCH net-next 2/4] net: hns3: refine the flow director handle

[Huazhong Tan]

From: Jian Shen <shenjian15@huawei.com>

In order to be compatible with aRFS rules, this patch adds
spin_lock for flow director rule adding, deleting, querying,
and packages the rule configuration.

Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
---
 .../ethernet/hisilicon/hns3/hns3pf/hclge_main.c    | 131 ++++++++++++++++-----
 .../ethernet/hisilicon/hns3/hns3pf/hclge_main.h    |  13 ++
 2 files changed, 112 insertions(+), 32 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index d3b1f8c..58a6a4d 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -1226,8 +1226,10 @@ static int hclge_configure(struct hclge_dev *hdev)
 	hdev->tm_info.hw_pfc_map = 0;
 	hdev->wanted_umv_size = cfg.umv_space;
 
-	if (hnae3_dev_fd_supported(hdev))
+	if (hnae3_dev_fd_supported(hdev)) {
 		hdev->fd_en = true;
+		hdev->fd_active_type = HCLGE_FD_RULE_NONE;
+	}
 
 	ret = hclge_parse_speed(cfg.default_speed, &hdev->hw.mac.speed);
 	if (ret) {
@@ -4906,14 +4908,18 @@ static bool hclge_fd_rule_exist(struct hclge_dev *hdev, u16 location)
 	struct hclge_fd_rule *rule = NULL;
 	struct hlist_node *node2;
 
+	spin_lock_bh(&hdev->fd_rule_lock);
 	hlist_for_each_entry_safe(rule, node2, &hdev->fd_rule_list, rule_node) {
 		if (rule->location >= location)
 			break;
 	}
 
+	spin_unlock_bh(&hdev->fd_rule_lock);
+
 	return  rule && rule->location == location;
 }
 
+/* make sure being called after lock up with fd_rule_lock */
 static int hclge_fd_update_rule_list(struct hclge_dev *hdev,
 				     struct hclge_fd_rule *new_rule,
 				     u16 location,
@@ -4937,9 +4943,13 @@ static int hclge_fd_update_rule_list(struct hclge_dev *hdev,
 		kfree(rule);
 		hdev->hclge_fd_rule_num--;
 
-		if (!is_add)
-			return 0;
+		if (!is_add) {
+			if (!hdev->hclge_fd_rule_num)
+				hdev->fd_active_type = HCLGE_FD_RULE_NONE;
+			clear_bit(location, hdev->fd_bmap);
 
+			return 0;
+		}
 	} else if (!is_add) {
 		dev_err(&hdev->pdev->dev,
 			"delete fail, rule %d is inexistent\n",
@@ -4954,7 +4964,9 @@ static int hclge_fd_update_rule_list(struct hclge_dev *hdev,
 	else
 		hlist_add_head(&new_rule->rule_node, &hdev->fd_rule_list);
 
+	set_bit(location, hdev->fd_bmap);
 	hdev->hclge_fd_rule_num++;
+	hdev->fd_active_type = new_rule->rule_type;
 
 	return 0;
 }
@@ -5112,6 +5124,36 @@ static int hclge_fd_get_tuple(struct hclge_dev *hdev,
 	return 0;
 }
 
+/* make sure being called after lock up with fd_rule_lock */
+static int hclge_fd_config_rule(struct hclge_dev *hdev,
+				struct hclge_fd_rule *rule)
+{
+	int ret;
+
+	if (!rule) {
+		dev_err(&hdev->pdev->dev,
+			"The flow director rule is NULL\n");
+		return -EINVAL;
+	}
+
+	/* it will never fail here, so needn't to check return value */
+	hclge_fd_update_rule_list(hdev, rule, rule->location, true);
+
+	ret = hclge_config_action(hdev, HCLGE_FD_STAGE_1, rule);
+	if (ret)
+		goto clear_rule;
+
+	ret = hclge_config_key(hdev, HCLGE_FD_STAGE_1, rule);
+	if (ret)
+		goto clear_rule;
+
+	return 0;
+
+clear_rule:
+	hclge_fd_update_rule_list(hdev, rule, rule->location, false);
+	return ret;
+}
+
 static int hclge_add_fd_entry(struct hnae3_handle *handle,
 			      struct ethtool_rxnfc *cmd)
 {
@@ -5174,8 +5216,10 @@ static int hclge_add_fd_entry(struct hnae3_handle *handle,
 		return -ENOMEM;
 
 	ret = hclge_fd_get_tuple(hdev, fs, rule);
-	if (ret)
-		goto free_rule;
+	if (ret) {
+		kfree(rule);
+		return ret;
+	}
 
 	rule->flow_type = fs->flow_type;
 
@@ -5184,23 +5228,13 @@ static int hclge_add_fd_entry(struct hnae3_handle *handle,
 	rule->vf_id = dst_vport_id;
 	rule->queue_id = q_index;
 	rule->action = action;
+	rule->rule_type = HCLGE_FD_EP_ACTIVE;
 
-	ret = hclge_config_action(hdev, HCLGE_FD_STAGE_1, rule);
-	if (ret)
-		goto free_rule;
-
-	ret = hclge_config_key(hdev, HCLGE_FD_STAGE_1, rule);
-	if (ret)
-		goto free_rule;
-
-	ret = hclge_fd_update_rule_list(hdev, rule, fs->location, true);
-	if (ret)
-		goto free_rule;
+	spin_lock_bh(&hdev->fd_rule_lock);
+	ret = hclge_fd_config_rule(hdev, rule);
 
-	return ret;
+	spin_unlock_bh(&hdev->fd_rule_lock);
 
-free_rule:
-	kfree(rule);
 	return ret;
 }
 
@@ -5232,8 +5266,12 @@ static int hclge_del_fd_entry(struct hnae3_handle *handle,
 	if (ret)
 		return ret;
 
-	return hclge_fd_update_rule_list(hdev, NULL, fs->location,
-					 false);
+	spin_lock_bh(&hdev->fd_rule_lock);
+	ret = hclge_fd_update_rule_list(hdev, NULL, fs->location, false);
+
+	spin_unlock_bh(&hdev->fd_rule_lock);
+
+	return ret;
 }
 
 static void hclge_del_all_fd_entries(struct hnae3_handle *handle,
@@ -5243,25 +5281,30 @@ static void hclge_del_all_fd_entries(struct hnae3_handle *handle,
 	struct hclge_dev *hdev = vport->back;
 	struct hclge_fd_rule *rule;
 	struct hlist_node *node;
+	u16 location;
 
 	if (!hnae3_dev_fd_supported(hdev))
 		return;
 
+	spin_lock_bh(&hdev->fd_rule_lock);
+	for_each_set_bit(location, hdev->fd_bmap,
+			 hdev->fd_cfg.rule_num[HCLGE_FD_STAGE_1])
+		hclge_fd_tcam_config(hdev, HCLGE_FD_STAGE_1, true, location,
+				     NULL, false);
+
 	if (clear_list) {
 		hlist_for_each_entry_safe(rule, node, &hdev->fd_rule_list,
 					  rule_node) {
-			hclge_fd_tcam_config(hdev, HCLGE_FD_STAGE_1, true,
-					     rule->location, NULL, false);
 			hlist_del(&rule->rule_node);
 			kfree(rule);
-			hdev->hclge_fd_rule_num--;
 		}
-	} else {
-		hlist_for_each_entry_safe(rule, node, &hdev->fd_rule_list,
-					  rule_node)
-			hclge_fd_tcam_config(hdev, HCLGE_FD_STAGE_1, true,
-					     rule->location, NULL, false);
+		hdev->fd_active_type = HCLGE_FD_RULE_NONE;
+		hdev->hclge_fd_rule_num = 0;
+		bitmap_zero(hdev->fd_bmap,
+			    hdev->fd_cfg.rule_num[HCLGE_FD_STAGE_1]);
 	}
+
+	spin_unlock_bh(&hdev->fd_rule_lock);
 }
 
 static int hclge_restore_fd_entries(struct hnae3_handle *handle)
@@ -5283,6 +5326,7 @@ static int hclge_restore_fd_entries(struct hnae3_handle *handle)
 	if (!hdev->fd_en)
 		return 0;
 
+	spin_lock_bh(&hdev->fd_rule_lock);
 	hlist_for_each_entry_safe(rule, node, &hdev->fd_rule_list, rule_node) {
 		ret = hclge_config_action(hdev, HCLGE_FD_STAGE_1, rule);
 		if (!ret)
@@ -5292,11 +5336,18 @@ static int hclge_restore_fd_entries(struct hnae3_handle *handle)
 			dev_warn(&hdev->pdev->dev,
 				 "Restore rule %d failed, remove it\n",
 				 rule->location);
+			clear_bit(rule->location, hdev->fd_bmap);
 			hlist_del(&rule->rule_node);
 			kfree(rule);
 			hdev->hclge_fd_rule_num--;
 		}
 	}
+
+	if (hdev->hclge_fd_rule_num)
+		hdev->fd_active_type = HCLGE_FD_EP_ACTIVE;
+
+	spin_unlock_bh(&hdev->fd_rule_lock);
+
 	return 0;
 }
 
@@ -5329,13 +5380,18 @@ static int hclge_get_fd_rule_info(struct hnae3_handle *handle,
 
 	fs = (struct ethtool_rx_flow_spec *)&cmd->fs;
 
+	spin_lock_bh(&hdev->fd_rule_lock);
+
 	hlist_for_each_entry_safe(rule, node2, &hdev->fd_rule_list, rule_node) {
 		if (rule->location >= fs->location)
 			break;
 	}
 
-	if (!rule || fs->location != rule->location)
+	if (!rule || fs->location != rule->location) {
+		spin_unlock_bh(&hdev->fd_rule_lock);
+
 		return -ENOENT;
+	}
 
 	fs->flow_type = rule->flow_type;
 	switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT)) {
@@ -5474,6 +5530,7 @@ static int hclge_get_fd_rule_info(struct hnae3_handle *handle,
 
 		break;
 	default:
+		spin_unlock_bh(&hdev->fd_rule_lock);
 		return -EOPNOTSUPP;
 	}
 
@@ -5505,6 +5562,8 @@ static int hclge_get_fd_rule_info(struct hnae3_handle *handle,
 		fs->ring_cookie |= vf_id;
 	}
 
+	spin_unlock_bh(&hdev->fd_rule_lock);
+
 	return 0;
 }
 
@@ -5522,15 +5581,20 @@ static int hclge_get_all_rules(struct hnae3_handle *handle,
 
 	cmd->data = hdev->fd_cfg.rule_num[HCLGE_FD_STAGE_1];
 
+	spin_lock_bh(&hdev->fd_rule_lock);
 	hlist_for_each_entry_safe(rule, node2,
 				  &hdev->fd_rule_list, rule_node) {
-		if (cnt == cmd->rule_cnt)
+		if (cnt == cmd->rule_cnt) {
+			spin_unlock_bh(&hdev->fd_rule_lock);
 			return -EMSGSIZE;
+		}
 
 		rule_locs[cnt] = rule->location;
 		cnt++;
 	}
 
+	spin_unlock_bh(&hdev->fd_rule_lock);
+
 	cmd->rule_cnt = cnt;
 
 	return 0;
@@ -5565,10 +5629,12 @@ static void hclge_enable_fd(struct hnae3_handle *handle, bool enable)
 {
 	struct hclge_vport *vport = hclge_get_vport(handle);
 	struct hclge_dev *hdev = vport->back;
+	bool clear;
 
 	hdev->fd_en = enable;
+	clear = hdev->fd_active_type == HCLGE_FD_ARFS_ACTIVE ? true : false;
 	if (!enable)
-		hclge_del_all_fd_entries(handle, false);
+		hclge_del_all_fd_entries(handle, clear);
 	else
 		hclge_restore_fd_entries(handle);
 }
@@ -8143,6 +8209,7 @@ static int hclge_init_ae_dev(struct hnae3_ae_dev *ae_dev)
 
 	mutex_init(&hdev->vport_lock);
 	mutex_init(&hdev->vport_cfg_mutex);
+	spin_lock_init(&hdev->fd_rule_lock);
 
 	ret = hclge_pci_init(hdev);
 	if (ret) {
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h
index dd06b11..2976bad 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h
@@ -578,6 +578,15 @@ static const struct key_info tuple_key_info[] = {
 #define MAX_KEY_BYTES	(MAX_KEY_DWORDS * 4)
 #define MAX_META_DATA_LENGTH	32
 
+/* assigned by firmware, the real filter number for each pf may be less */
+#define MAX_FD_FILTER_NUM	4096
+
+enum HCLGE_FD_ACTIVE_RULE_TYPE {
+	HCLGE_FD_RULE_NONE,
+	HCLGE_FD_ARFS_ACTIVE,
+	HCLGE_FD_EP_ACTIVE,
+};
+
 enum HCLGE_FD_PACKET_TYPE {
 	NIC_PACKET,
 	ROCE_PACKET,
@@ -630,6 +639,7 @@ struct hclge_fd_rule {
 	u16 vf_id;
 	u16 queue_id;
 	u16 location;
+	enum HCLGE_FD_ACTIVE_RULE_TYPE rule_type;
 };
 
 struct hclge_fd_ad_data {
@@ -809,7 +819,10 @@ struct hclge_dev {
 
 	struct hclge_fd_cfg fd_cfg;
 	struct hlist_head fd_rule_list;
+	spinlock_t fd_rule_lock; /* protect fd_rule_list and fd_bmap */
 	u16 hclge_fd_rule_num;
+	unsigned long fd_bmap[BITS_TO_LONGS(MAX_FD_FILTER_NUM)];
+	enum HCLGE_FD_ACTIVE_RULE_TYPE fd_active_type;
 	u8 fd_en;
 
 	u16 wanted_umv_size;
-- 
2.7.4

[PATCH net-next 3/4] net: hns3: add aRFS support for PF

[Huazhong Tan]

From: Jian Shen <shenjian15@huawei.com>

This patch adds aRFS support for PF. The aRFS rules are also
stored in the hardware flow director table, Use the existing
filter management functions to insert TCPv4/UDPv4/TCPv6/UDPv6
flow director filters. To avoid rule conflict, once user adds
flow director rules with ethtool, the aRFS will be disabled,
and clear exist aRFS rules. Once all user configure rules were
removed, aRFS can work again.

Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hnae3.h        |   4 +
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c    |  31 ++++
 .../ethernet/hisilicon/hns3/hns3pf/hclge_main.c    | 200 +++++++++++++++++++++
 .../ethernet/hisilicon/hns3/hns3pf/hclge_main.h    |   3 +
 4 files changed, 238 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hnae3.h b/drivers/net/ethernet/hisilicon/hns3/hnae3.h
index ad21b0e..a18645e 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hnae3.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hnae3.h
@@ -343,6 +343,8 @@ struct hnae3_ae_dev {
  *   Enable/disable hardware strip vlan tag of packets received
  * set_gro_en
  *   Enable/disable HW GRO
+ * add_arfs_entry
+ *   Check the 5-tuples of flow, and create flow director rule
  */
 struct hnae3_ae_ops {
 	int (*init_ae_dev)(struct hnae3_ae_dev *ae_dev);
@@ -492,6 +494,8 @@ struct hnae3_ae_ops {
 				struct ethtool_rxnfc *cmd, u32 *rule_locs);
 	int (*restore_fd_rules)(struct hnae3_handle *handle);
 	void (*enable_fd)(struct hnae3_handle *handle, bool enable);
+	int (*add_arfs_entry)(struct hnae3_handle *handle, u16 queue_id,
+			      u16 flow_id, struct flow_keys *fkeys);
 	int (*dbg_run_cmd)(struct hnae3_handle *handle, char *cmd_buf);
 	pci_ers_result_t (*handle_hw_ras_error)(struct hnae3_ae_dev *ae_dev);
 	bool (*get_hw_reset_stat)(struct hnae3_handle *handle);
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index b2be424..5e12705 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -1743,6 +1743,32 @@ static void hns3_nic_net_timeout(struct net_device *ndev)
 		h->ae_algo->ops->reset_event(h->pdev, h);
 }
 
+#ifdef CONFIG_RFS_ACCEL
+static int hns3_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
+			      u16 rxq_index, u32 flow_id)
+{
+	struct hnae3_handle *h = hns3_get_handle(dev);
+	struct flow_keys fkeys;
+
+	if (!h->ae_algo->ops->add_arfs_entry)
+		return -EOPNOTSUPP;
+
+	if (skb->encapsulation)
+		return -EPROTONOSUPPORT;
+
+	if (!skb_flow_dissect_flow_keys(skb, &fkeys, 0))
+		return -EPROTONOSUPPORT;
+
+	if ((fkeys.basic.n_proto != htons(ETH_P_IP) &&
+	     fkeys.basic.n_proto != htons(ETH_P_IPV6)) ||
+	    (fkeys.basic.ip_proto != IPPROTO_TCP &&
+	     fkeys.basic.ip_proto != IPPROTO_UDP))
+		return -EPROTONOSUPPORT;
+
+	return h->ae_algo->ops->add_arfs_entry(h, rxq_index, flow_id, &fkeys);
+}
+#endif
+
 static const struct net_device_ops hns3_nic_netdev_ops = {
 	.ndo_open		= hns3_nic_net_open,
 	.ndo_stop		= hns3_nic_net_stop,
@@ -1758,6 +1784,10 @@ static const struct net_device_ops hns3_nic_netdev_ops = {
 	.ndo_vlan_rx_add_vid	= hns3_vlan_rx_add_vid,
 	.ndo_vlan_rx_kill_vid	= hns3_vlan_rx_kill_vid,
 	.ndo_set_vf_vlan	= hns3_ndo_set_vf_vlan,
+#ifdef CONFIG_RFS_ACCEL
+	.ndo_rx_flow_steer	= hns3_rx_flow_steer,
+#endif
+
 };
 
 bool hns3_is_phys_func(struct pci_dev *pdev)
@@ -2849,6 +2879,7 @@ static int hns3_handle_rx_bd(struct hns3_enet_ring *ring,
 		return ret;
 	}
 
+	skb_record_rx_queue(skb, ring->tqp->tqp_index);
 	*out_skb = skb;
 
 	return 0;
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 58a6a4d..3ef5d09d 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -35,6 +35,8 @@ static int hclge_reset_ae_dev(struct hnae3_ae_dev *ae_dev);
 static bool hclge_get_hw_reset_stat(struct hnae3_handle *handle);
 static int hclge_set_umv_space(struct hclge_dev *hdev, u16 space_size,
 			       u16 *allocated_size, bool is_alloc);
+static void hclge_rfs_filter_expire(struct hclge_dev *hdev);
+static void hclge_clear_arfs_rules(struct hnae3_handle *handle);
 
 static struct hnae3_ae_algo ae_algo;
 
@@ -2647,6 +2649,7 @@ static void hclge_service_timer(struct timer_list *t)
 
 	mod_timer(&hdev->service_timer, jiffies + HZ);
 	hdev->hw_stats.stats_timer++;
+	hdev->fd_arfs_expire_timer++;
 	hclge_task_schedule(hdev);
 }
 
@@ -3523,6 +3526,10 @@ static void hclge_service_task(struct work_struct *work)
 	hclge_update_port_info(hdev);
 	hclge_update_link_status(hdev);
 	hclge_update_vport_alive(hdev);
+	if (hdev->fd_arfs_expire_timer >= HCLGE_FD_ARFS_EXPIRE_TIMER_INTERVAL) {
+		hclge_rfs_filter_expire(hdev);
+		hdev->fd_arfs_expire_timer = 0;
+	}
 	hclge_service_complete(hdev);
 }
 
@@ -5230,6 +5237,11 @@ static int hclge_add_fd_entry(struct hnae3_handle *handle,
 	rule->action = action;
 	rule->rule_type = HCLGE_FD_EP_ACTIVE;
 
+	/* to avoid rule conflict, when user configure rule by ethtool,
+	 * we need to clear all arfs rules
+	 */
+	hclge_clear_arfs_rules(handle);
+
 	spin_lock_bh(&hdev->fd_rule_lock);
 	ret = hclge_fd_config_rule(hdev, rule);
 
@@ -5600,6 +5612,191 @@ static int hclge_get_all_rules(struct hnae3_handle *handle,
 	return 0;
 }
 
+static void hclge_fd_get_flow_tuples(const struct flow_keys *fkeys,
+				     struct hclge_fd_rule_tuples *tuples)
+{
+	tuples->ether_proto = be16_to_cpu(fkeys->basic.n_proto);
+	tuples->ip_proto = fkeys->basic.ip_proto;
+	tuples->dst_port = be16_to_cpu(fkeys->ports.dst);
+
+	if (fkeys->basic.n_proto == htons(ETH_P_IP)) {
+		tuples->src_ip[3] = be32_to_cpu(fkeys->addrs.v4addrs.src);
+		tuples->dst_ip[3] = be32_to_cpu(fkeys->addrs.v4addrs.dst);
+	} else {
+		memcpy(tuples->src_ip,
+		       fkeys->addrs.v6addrs.src.in6_u.u6_addr32,
+		       sizeof(tuples->src_ip));
+		memcpy(tuples->dst_ip,
+		       fkeys->addrs.v6addrs.dst.in6_u.u6_addr32,
+		       sizeof(tuples->dst_ip));
+	}
+}
+
+/* traverse all rules, check whether an existed rule has the same tuples */
+static struct hclge_fd_rule *
+hclge_fd_search_flow_keys(struct hclge_dev *hdev,
+			  const struct hclge_fd_rule_tuples *tuples)
+{
+	struct hclge_fd_rule *rule = NULL;
+	struct hlist_node *node;
+
+	hlist_for_each_entry_safe(rule, node, &hdev->fd_rule_list, rule_node) {
+		if (!memcmp(tuples, &rule->tuples, sizeof(*tuples)))
+			return rule;
+	}
+
+	return NULL;
+}
+
+static void hclge_fd_build_arfs_rule(const struct hclge_fd_rule_tuples *tuples,
+				     struct hclge_fd_rule *rule)
+{
+	rule->unused_tuple = BIT(INNER_SRC_MAC) | BIT(INNER_DST_MAC) |
+			     BIT(INNER_VLAN_TAG_FST) | BIT(INNER_IP_TOS) |
+			     BIT(INNER_SRC_PORT);
+	rule->action = 0;
+	rule->vf_id = 0;
+	rule->rule_type = HCLGE_FD_ARFS_ACTIVE;
+	if (tuples->ether_proto == ETH_P_IP) {
+		if (tuples->ip_proto == IPPROTO_TCP)
+			rule->flow_type = TCP_V4_FLOW;
+		else
+			rule->flow_type = UDP_V4_FLOW;
+	} else {
+		if (tuples->ip_proto == IPPROTO_TCP)
+			rule->flow_type = TCP_V6_FLOW;
+		else
+			rule->flow_type = UDP_V6_FLOW;
+	}
+	memcpy(&rule->tuples, tuples, sizeof(rule->tuples));
+	memset(&rule->tuples_mask, 0xFF, sizeof(rule->tuples_mask));
+}
+
+static int hclge_add_fd_entry_by_arfs(struct hnae3_handle *handle, u16 queue_id,
+				      u16 flow_id, struct flow_keys *fkeys)
+{
+#ifdef CONFIG_RFS_ACCEL
+	struct hclge_vport *vport = hclge_get_vport(handle);
+	struct hclge_fd_rule_tuples new_tuples;
+	struct hclge_dev *hdev = vport->back;
+	struct hclge_fd_rule *rule;
+	u16 tmp_queue_id;
+	u16 bit_id;
+	int ret;
+
+	if (!hnae3_dev_fd_supported(hdev))
+		return -EOPNOTSUPP;
+
+	memset(&new_tuples, 0, sizeof(new_tuples));
+	hclge_fd_get_flow_tuples(fkeys, &new_tuples);
+
+	spin_lock_bh(&hdev->fd_rule_lock);
+
+	/* when there is already fd rule existed add by user,
+	 * arfs should not work
+	 */
+	if (hdev->fd_active_type == HCLGE_FD_EP_ACTIVE) {
+		spin_unlock_bh(&hdev->fd_rule_lock);
+
+		return -EOPNOTSUPP;
+	}
+
+	/* check is there flow director filter existed for this flow,
+	 * if not, create a new filter for it;
+	 * if filter exist with different queue id, modify the filter;
+	 * if filter exist with same queue id, do nothing
+	 */
+	rule = hclge_fd_search_flow_keys(hdev, &new_tuples);
+	if (!rule) {
+		bit_id = find_first_zero_bit(hdev->fd_bmap, MAX_FD_FILTER_NUM);
+		if (bit_id >= hdev->fd_cfg.rule_num[HCLGE_FD_STAGE_1]) {
+			spin_unlock_bh(&hdev->fd_rule_lock);
+
+			return -ENOSPC;
+		}
+
+		rule = kzalloc(sizeof(*rule), GFP_KERNEL);
+		if (!rule) {
+			spin_unlock_bh(&hdev->fd_rule_lock);
+
+			return -ENOMEM;
+		}
+
+		set_bit(bit_id, hdev->fd_bmap);
+		rule->location = bit_id;
+		rule->flow_id = flow_id;
+		rule->queue_id = queue_id;
+		hclge_fd_build_arfs_rule(&new_tuples, rule);
+		ret = hclge_fd_config_rule(hdev, rule);
+
+		spin_unlock_bh(&hdev->fd_rule_lock);
+
+		if (ret)
+			return ret;
+
+		return rule->location;
+	}
+
+	spin_unlock_bh(&hdev->fd_rule_lock);
+
+	if (rule->queue_id == queue_id)
+		return rule->location;
+
+	tmp_queue_id = rule->queue_id;
+	rule->queue_id = queue_id;
+	ret = hclge_config_action(hdev, HCLGE_FD_STAGE_1, rule);
+	if (ret) {
+		rule->queue_id = tmp_queue_id;
+		return ret;
+	}
+
+	return rule->location;
+#endif
+}
+
+static void hclge_rfs_filter_expire(struct hclge_dev *hdev)
+{
+#ifdef CONFIG_RFS_ACCEL
+	struct hnae3_handle *handle = &hdev->vport[0].nic;
+	struct hclge_fd_rule *rule;
+	struct hlist_node *node;
+	HLIST_HEAD(del_list);
+
+	spin_lock_bh(&hdev->fd_rule_lock);
+	if (hdev->fd_active_type != HCLGE_FD_ARFS_ACTIVE) {
+		spin_unlock_bh(&hdev->fd_rule_lock);
+		return;
+	}
+	hlist_for_each_entry_safe(rule, node, &hdev->fd_rule_list, rule_node) {
+		if (rps_may_expire_flow(handle->netdev, rule->queue_id,
+					rule->flow_id, rule->location)) {
+			hlist_del_init(&rule->rule_node);
+			hlist_add_head(&rule->rule_node, &del_list);
+			hdev->hclge_fd_rule_num--;
+			clear_bit(rule->location, hdev->fd_bmap);
+		}
+	}
+	spin_unlock_bh(&hdev->fd_rule_lock);
+
+	hlist_for_each_entry_safe(rule, node, &del_list, rule_node) {
+		hclge_fd_tcam_config(hdev, HCLGE_FD_STAGE_1, true,
+				     rule->location, NULL, false);
+		kfree(rule);
+	}
+#endif
+}
+
+static void hclge_clear_arfs_rules(struct hnae3_handle *handle)
+{
+#ifdef CONFIG_RFS_ACCEL
+	struct hclge_vport *vport = hclge_get_vport(handle);
+	struct hclge_dev *hdev = vport->back;
+
+	if (hdev->fd_active_type == HCLGE_FD_ARFS_ACTIVE)
+		hclge_del_all_fd_entries(handle, true);
+#endif
+}
+
 static bool hclge_get_hw_reset_stat(struct hnae3_handle *handle)
 {
 	struct hclge_vport *vport = hclge_get_vport(handle);
@@ -5904,6 +6101,8 @@ static void hclge_ae_stop(struct hnae3_handle *handle)
 
 	set_bit(HCLGE_STATE_DOWN, &hdev->state);
 
+	hclge_clear_arfs_rules(handle);
+
 	/* If it is not PF reset, the firmware will disable the MAC,
 	 * so it only need to stop phy here.
 	 */
@@ -8975,6 +9174,7 @@ static const struct hnae3_ae_ops hclge_ops = {
 	.get_fd_all_rules = hclge_get_all_rules,
 	.restore_fd_rules = hclge_restore_fd_entries,
 	.enable_fd = hclge_enable_fd,
+	.add_arfs_entry = hclge_add_fd_entry_by_arfs,
 	.dbg_run_cmd = hclge_dbg_run_cmd,
 	.handle_hw_ras_error = hclge_handle_hw_ras_error,
 	.get_hw_reset_stat = hclge_get_hw_reset_stat,
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h
index 2976bad..c770390 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h
@@ -580,6 +580,7 @@ static const struct key_info tuple_key_info[] = {
 
 /* assigned by firmware, the real filter number for each pf may be less */
 #define MAX_FD_FILTER_NUM	4096
+#define HCLGE_FD_ARFS_EXPIRE_TIMER_INTERVAL	5
 
 enum HCLGE_FD_ACTIVE_RULE_TYPE {
 	HCLGE_FD_RULE_NONE,
@@ -639,6 +640,7 @@ struct hclge_fd_rule {
 	u16 vf_id;
 	u16 queue_id;
 	u16 location;
+	u16 flow_id;	/* only used for arfs */
 	enum HCLGE_FD_ACTIVE_RULE_TYPE rule_type;
 };
 
@@ -821,6 +823,7 @@ struct hclge_dev {
 	struct hlist_head fd_rule_list;
 	spinlock_t fd_rule_lock; /* protect fd_rule_list and fd_bmap */
 	u16 hclge_fd_rule_num;
+	u16 fd_arfs_expire_timer;
 	unsigned long fd_bmap[BITS_TO_LONGS(MAX_FD_FILTER_NUM)];
 	enum HCLGE_FD_ACTIVE_RULE_TYPE fd_active_type;
 	u8 fd_en;
-- 
2.7.4

[PATCH net-next 4/4] net: hns3: fix for FEC configuration

[Huazhong Tan]

From: Jian Shen <shenjian15@huawei.com>

The FEC capbility may be changed with port speed changes. Driver
needs to read the active FEC mode, and update FEC capability
when port speed changes.

Fixes: 7e6ec9148a1d ("net: hns3: add support for FEC encoding control")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 3ef5d09d..a3fba7b 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -2512,6 +2512,9 @@ static void hclge_update_link_status(struct hclge_dev *hdev)
 
 static void hclge_update_port_capability(struct hclge_mac *mac)
 {
+	/* update fec ability by speed */
+	hclge_convert_setting_fec(mac);
+
 	/* firmware can not identify back plane type, the media type
 	 * read from configuration can help deal it
 	 */
@@ -2584,6 +2587,10 @@ static int hclge_get_sfp_info(struct hclge_dev *hdev, struct hclge_mac *mac)
 		mac->speed_ability = le32_to_cpu(resp->speed_ability);
 		mac->autoneg = resp->autoneg;
 		mac->support_autoneg = resp->autoneg_ability;
+		if (!resp->active_fec)
+			mac->fec_mode = 0;
+		else
+			mac->fec_mode = BIT(resp->active_fec);
 	} else {
 		mac->speed_type = QUERY_SFP_SPEED;
 	}
-- 
2.7.4

Re: [PATCH net-next 0/4] net: hns3: add aRFS feature and fix FEC bugs for HNS3 driver

[David Miller]

From: Huazhong Tan <tanhuazhong@huawei.com>
Date: Fri, 24 May 2019 19:19:44 +0800

> This patchset adds some new features support and fixes some bugs:
> [Patch 1/4 - 3/4] adds support for aRFS
> [Patch 4/4] fix FEC configuration issue

Series applied.