[PATCH V2 net 0/2] There are some bugfix for the HNS ethernet driver

[PATCH V2 net 0/2] There are some bugfix for the HNS ethernet driver

[Jijie Shao]

There are some bugfix for the HNS ethernet driver

---
changeLog:
v1 -> v2:
  - Fixed the internal function is not decorated with static issue, suggested by Jakub
  v1: https://lore.kernel.org/all/20231201102703.4134592-1-shaojijie@huawei.com/
---

Yonglong Liu (2):
  net: hns: fix wrong head when modify the tx feature when sending
    packets
  net: hns: fix fake link up on xge port

 .../net/ethernet/hisilicon/hns/hns_dsaf_mac.c | 29 ++++++++++
 drivers/net/ethernet/hisilicon/hns/hns_enet.c | 53 +++++++++++--------
 drivers/net/ethernet/hisilicon/hns/hns_enet.h |  3 +-
 3 files changed, 62 insertions(+), 23 deletions(-)

-- 
2.30.0

[PATCH V2 net 1/2] net: hns: fix wrong head when modify the tx feature when sending packets

[Jijie Shao]

From: Yonglong Liu <liuyonglong@huawei.com>

When modify the tx feature, the hns driver will modify the
maybe_stop_tx() and fill_desc() functions, if the modify happens
during packet sending, will cause the hardware and software
pointers do not match, and the port can not work anymore.

This patch deletes the maybe_stop_tx() and fill_desc() functions
modification when setting tx feature, and use the skb_is_gro()
to determine use tso functions or non-tso functions when packets
sending.

Fixes: 38f616da1c28 ("net:hns: Add support of ethtool TSO set option for Hip06 in HNS")
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
---
 drivers/net/ethernet/hisilicon/hns/hns_enet.c | 53 +++++++++++--------
 drivers/net/ethernet/hisilicon/hns/hns_enet.h |  3 +-
 2 files changed, 33 insertions(+), 23 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
index 0900abf5c508..8a713eed4465 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
@@ -142,7 +142,8 @@ MODULE_DEVICE_TABLE(acpi, hns_enet_acpi_match);
 
 static void fill_desc(struct hnae_ring *ring, void *priv,
 		      int size, dma_addr_t dma, int frag_end,
-		      int buf_num, enum hns_desc_type type, int mtu)
+		      int buf_num, enum hns_desc_type type, int mtu,
+		      bool is_gso)
 {
 	struct hnae_desc *desc = &ring->desc[ring->next_to_use];
 	struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
@@ -275,6 +276,15 @@ static int hns_nic_maybe_stop_tso(
 	return 0;
 }
 
+static int hns_nic_maybe_stop_tx_v2(struct sk_buff **out_skb, int *bnum,
+				    struct hnae_ring *ring)
+{
+	if (skb_is_gso(*out_skb))
+		return hns_nic_maybe_stop_tso(out_skb, bnum, ring);
+	else
+		return hns_nic_maybe_stop_tx(out_skb, bnum, ring);
+}
+
 static void fill_tso_desc(struct hnae_ring *ring, void *priv,
 			  int size, dma_addr_t dma, int frag_end,
 			  int buf_num, enum hns_desc_type type, int mtu)
@@ -300,6 +310,19 @@ static void fill_tso_desc(struct hnae_ring *ring, void *priv,
 				mtu);
 }
 
+static void fill_desc_v2(struct hnae_ring *ring, void *priv,
+			 int size, dma_addr_t dma, int frag_end,
+			 int buf_num, enum hns_desc_type type, int mtu,
+			 bool is_gso)
+{
+	if (is_gso)
+		fill_tso_desc(ring, priv, size, dma, frag_end, buf_num, type,
+			      mtu);
+	else
+		fill_v2_desc(ring, priv, size, dma, frag_end, buf_num, type,
+			     mtu);
+}
+
 netdev_tx_t hns_nic_net_xmit_hw(struct net_device *ndev,
 				struct sk_buff *skb,
 				struct hns_nic_ring_data *ring_data)
@@ -313,6 +336,7 @@ netdev_tx_t hns_nic_net_xmit_hw(struct net_device *ndev,
 	int seg_num;
 	dma_addr_t dma;
 	int size, next_to_use;
+	bool is_gso;
 	int i;
 
 	switch (priv->ops.maybe_stop_tx(&skb, &buf_num, ring)) {
@@ -339,8 +363,9 @@ netdev_tx_t hns_nic_net_xmit_hw(struct net_device *ndev,
 		ring->stats.sw_err_cnt++;
 		goto out_err_tx_ok;
 	}
+	is_gso = skb_is_gso(skb);
 	priv->ops.fill_desc(ring, skb, size, dma, seg_num == 1 ? 1 : 0,
-			    buf_num, DESC_TYPE_SKB, ndev->mtu);
+			    buf_num, DESC_TYPE_SKB, ndev->mtu, is_gso);
 
 	/* fill the fragments */
 	for (i = 1; i < seg_num; i++) {
@@ -354,7 +379,7 @@ netdev_tx_t hns_nic_net_xmit_hw(struct net_device *ndev,
 		}
 		priv->ops.fill_desc(ring, skb_frag_page(frag), size, dma,
 				    seg_num - 1 == i ? 1 : 0, buf_num,
-				    DESC_TYPE_PAGE, ndev->mtu);
+				    DESC_TYPE_PAGE, ndev->mtu, is_gso);
 	}
 
 	/*complete translate all packets*/
@@ -1776,15 +1801,6 @@ static int hns_nic_set_features(struct net_device *netdev,
 			netdev_info(netdev, "enet v1 do not support tso!\n");
 		break;
 	default:
-		if (features & (NETIF_F_TSO | NETIF_F_TSO6)) {
-			priv->ops.fill_desc = fill_tso_desc;
-			priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
-			/* The chip only support 7*4096 */
-			netif_set_tso_max_size(netdev, 7 * 4096);
-		} else {
-			priv->ops.fill_desc = fill_v2_desc;
-			priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
-		}
 		break;
 	}
 	netdev->features = features;
@@ -2159,16 +2175,9 @@ static void hns_nic_set_priv_ops(struct net_device *netdev)
 		priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
 	} else {
 		priv->ops.get_rxd_bnum = get_v2rx_desc_bnum;
-		if ((netdev->features & NETIF_F_TSO) ||
-		    (netdev->features & NETIF_F_TSO6)) {
-			priv->ops.fill_desc = fill_tso_desc;
-			priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
-			/* This chip only support 7*4096 */
-			netif_set_tso_max_size(netdev, 7 * 4096);
-		} else {
-			priv->ops.fill_desc = fill_v2_desc;
-			priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
-		}
+		priv->ops.fill_desc = fill_desc_v2;
+		priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx_v2;
+		netif_set_tso_max_size(netdev, 7 * 4096);
 		/* enable tso when init
 		 * control tso on/off through TSE bit in bd
 		 */
diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.h b/drivers/net/ethernet/hisilicon/hns/hns_enet.h
index ffa9d6573f54..3f3ee032f631 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_enet.h
+++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.h
@@ -44,7 +44,8 @@ struct hns_nic_ring_data {
 struct hns_nic_ops {
 	void (*fill_desc)(struct hnae_ring *ring, void *priv,
 			  int size, dma_addr_t dma, int frag_end,
-			  int buf_num, enum hns_desc_type type, int mtu);
+			  int buf_num, enum hns_desc_type type, int mtu,
+			  bool is_gso);
 	int (*maybe_stop_tx)(struct sk_buff **out_skb,
 			     int *bnum, struct hnae_ring *ring);
 	void (*get_rxd_bnum)(u32 bnum_flag, int *out_bnum);
-- 
2.30.0

[PATCH V2 net 2/2] net: hns: fix fake link up on xge port

[Jijie Shao]

From: Yonglong Liu <liuyonglong@huawei.com>

If a xge port just connect with an optical module and no fiber,
it may have a fake link up because there may be interference on
the hardware. This patch adds an anti-shake to avoid the problem.
And the time of anti-shake is base on tests.

Fixes: b917078c1c10 ("net: hns: Add ACPI support to check SFP present")
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
---
 .../net/ethernet/hisilicon/hns/hns_dsaf_mac.c | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
index 928d934cb21a..c3abb14edd51 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
@@ -66,6 +66,27 @@ static enum mac_mode hns_get_enet_interface(const struct hns_mac_cb *mac_cb)
 	}
 }
 
+static void hns_mac_link_anti_shake(struct mac_driver *mac_ctrl_drv,
+				    u32 *link_status)
+{
+#define HNS_MAC_LINK_WAIT_TIME 5
+#define HNS_MAC_LINK_WAIT_CNT 40
+
+	int i;
+
+	if (!mac_ctrl_drv->get_link_status) {
+		*link_status = 0;
+		return;
+	}
+
+	for (i = 0; i < HNS_MAC_LINK_WAIT_CNT; i++) {
+		msleep(HNS_MAC_LINK_WAIT_TIME);
+		mac_ctrl_drv->get_link_status(mac_ctrl_drv, link_status);
+		if (!*link_status)
+			break;
+	}
+}
+
 void hns_mac_get_link_status(struct hns_mac_cb *mac_cb, u32 *link_status)
 {
 	struct mac_driver *mac_ctrl_drv;
@@ -83,6 +104,14 @@ void hns_mac_get_link_status(struct hns_mac_cb *mac_cb, u32 *link_status)
 							       &sfp_prsnt);
 		if (!ret)
 			*link_status = *link_status && sfp_prsnt;
+
+		/* for FIBER port, it may have a fake link up.
+		 * when the link status changes from down to up, we need to do
+		 * anti-shake. the anti-shake time is base on tests.
+		 * only FIBER port need to do this.
+		 */
+		if (*link_status && !mac_cb->link)
+			hns_mac_link_anti_shake(mac_ctrl_drv, link_status);
 	}
 
 	mac_cb->link = *link_status;
-- 
2.30.0

Re: [PATCH V2 net 1/2] net: hns: fix wrong head when modify the tx feature when sending packets

[Wojciech Drewek]

On 04.12.2023 02:10, Jijie Shao wrote:
> From: Yonglong Liu <liuyonglong@huawei.com>
> 
> When modify the tx feature, the hns driver will modify the

Upon changing the...

> maybe_stop_tx() and fill_desc() functions, if the modify happens
> during packet sending, will cause the hardware and software
> pointers do not match, and the port can not work anymore.
> 
> This patch deletes the maybe_stop_tx() and fill_desc() functions
> modification when setting tx feature, and use the skb_is_gro()
> to determine use tso functions or non-tso functions when packets
> sending.

and use the skb_is_gro() to determine which functions to use in the tx path.
> 
> Fixes: 38f616da1c28 ("net:hns: Add support of ethtool TSO set option for Hip06 in HNS")
> Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
> Signed-off-by: Jijie Shao <shaojijie@huawei.com>
> ---

Some commit msg suggestions, other than that:
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>

>  drivers/net/ethernet/hisilicon/hns/hns_enet.c | 53 +++++++++++--------
>  drivers/net/ethernet/hisilicon/hns/hns_enet.h |  3 +-
>  2 files changed, 33 insertions(+), 23 deletions(-)
> 
> diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
> index 0900abf5c508..8a713eed4465 100644
> --- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c
> +++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
> @@ -142,7 +142,8 @@ MODULE_DEVICE_TABLE(acpi, hns_enet_acpi_match);
>  
>  static void fill_desc(struct hnae_ring *ring, void *priv,
>  		      int size, dma_addr_t dma, int frag_end,
> -		      int buf_num, enum hns_desc_type type, int mtu)
> +		      int buf_num, enum hns_desc_type type, int mtu,
> +		      bool is_gso)
>  {
>  	struct hnae_desc *desc = &ring->desc[ring->next_to_use];
>  	struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
> @@ -275,6 +276,15 @@ static int hns_nic_maybe_stop_tso(
>  	return 0;
>  }
>  
> +static int hns_nic_maybe_stop_tx_v2(struct sk_buff **out_skb, int *bnum,
> +				    struct hnae_ring *ring)
> +{
> +	if (skb_is_gso(*out_skb))
> +		return hns_nic_maybe_stop_tso(out_skb, bnum, ring);
> +	else
> +		return hns_nic_maybe_stop_tx(out_skb, bnum, ring);
> +}
> +
>  static void fill_tso_desc(struct hnae_ring *ring, void *priv,
>  			  int size, dma_addr_t dma, int frag_end,
>  			  int buf_num, enum hns_desc_type type, int mtu)
> @@ -300,6 +310,19 @@ static void fill_tso_desc(struct hnae_ring *ring, void *priv,
>  				mtu);
>  }
>  
> +static void fill_desc_v2(struct hnae_ring *ring, void *priv,
> +			 int size, dma_addr_t dma, int frag_end,
> +			 int buf_num, enum hns_desc_type type, int mtu,
> +			 bool is_gso)
> +{
> +	if (is_gso)
> +		fill_tso_desc(ring, priv, size, dma, frag_end, buf_num, type,
> +			      mtu);
> +	else
> +		fill_v2_desc(ring, priv, size, dma, frag_end, buf_num, type,
> +			     mtu);
> +}
> +
>  netdev_tx_t hns_nic_net_xmit_hw(struct net_device *ndev,
>  				struct sk_buff *skb,
>  				struct hns_nic_ring_data *ring_data)
> @@ -313,6 +336,7 @@ netdev_tx_t hns_nic_net_xmit_hw(struct net_device *ndev,
>  	int seg_num;
>  	dma_addr_t dma;
>  	int size, next_to_use;
> +	bool is_gso;
>  	int i;
>  
>  	switch (priv->ops.maybe_stop_tx(&skb, &buf_num, ring)) {
> @@ -339,8 +363,9 @@ netdev_tx_t hns_nic_net_xmit_hw(struct net_device *ndev,
>  		ring->stats.sw_err_cnt++;
>  		goto out_err_tx_ok;
>  	}
> +	is_gso = skb_is_gso(skb);
>  	priv->ops.fill_desc(ring, skb, size, dma, seg_num == 1 ? 1 : 0,
> -			    buf_num, DESC_TYPE_SKB, ndev->mtu);
> +			    buf_num, DESC_TYPE_SKB, ndev->mtu, is_gso);
>  
>  	/* fill the fragments */
>  	for (i = 1; i < seg_num; i++) {
> @@ -354,7 +379,7 @@ netdev_tx_t hns_nic_net_xmit_hw(struct net_device *ndev,
>  		}
>  		priv->ops.fill_desc(ring, skb_frag_page(frag), size, dma,
>  				    seg_num - 1 == i ? 1 : 0, buf_num,
> -				    DESC_TYPE_PAGE, ndev->mtu);
> +				    DESC_TYPE_PAGE, ndev->mtu, is_gso);
>  	}
>  
>  	/*complete translate all packets*/
> @@ -1776,15 +1801,6 @@ static int hns_nic_set_features(struct net_device *netdev,
>  			netdev_info(netdev, "enet v1 do not support tso!\n");
>  		break;
>  	default:
> -		if (features & (NETIF_F_TSO | NETIF_F_TSO6)) {
> -			priv->ops.fill_desc = fill_tso_desc;
> -			priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
> -			/* The chip only support 7*4096 */
> -			netif_set_tso_max_size(netdev, 7 * 4096);
> -		} else {
> -			priv->ops.fill_desc = fill_v2_desc;
> -			priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
> -		}
>  		break;
>  	}
>  	netdev->features = features;
> @@ -2159,16 +2175,9 @@ static void hns_nic_set_priv_ops(struct net_device *netdev)
>  		priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
>  	} else {
>  		priv->ops.get_rxd_bnum = get_v2rx_desc_bnum;
> -		if ((netdev->features & NETIF_F_TSO) ||
> -		    (netdev->features & NETIF_F_TSO6)) {
> -			priv->ops.fill_desc = fill_tso_desc;
> -			priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
> -			/* This chip only support 7*4096 */
> -			netif_set_tso_max_size(netdev, 7 * 4096);
> -		} else {
> -			priv->ops.fill_desc = fill_v2_desc;
> -			priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
> -		}
> +		priv->ops.fill_desc = fill_desc_v2;
> +		priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx_v2;
> +		netif_set_tso_max_size(netdev, 7 * 4096);
>  		/* enable tso when init
>  		 * control tso on/off through TSE bit in bd
>  		 */
> diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.h b/drivers/net/ethernet/hisilicon/hns/hns_enet.h
> index ffa9d6573f54..3f3ee032f631 100644
> --- a/drivers/net/ethernet/hisilicon/hns/hns_enet.h
> +++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.h
> @@ -44,7 +44,8 @@ struct hns_nic_ring_data {
>  struct hns_nic_ops {
>  	void (*fill_desc)(struct hnae_ring *ring, void *priv,
>  			  int size, dma_addr_t dma, int frag_end,
> -			  int buf_num, enum hns_desc_type type, int mtu);
> +			  int buf_num, enum hns_desc_type type, int mtu,
> +			  bool is_gso);
>  	int (*maybe_stop_tx)(struct sk_buff **out_skb,
>  			     int *bnum, struct hnae_ring *ring);
>  	void (*get_rxd_bnum)(u32 bnum_flag, int *out_bnum);

Re: [PATCH V2 net 2/2] net: hns: fix fake link up on xge port

[Wojciech Drewek]

On 04.12.2023 02:10, Jijie Shao wrote:
> From: Yonglong Liu <liuyonglong@huawei.com>
> 
> If a xge port just connect with an optical module and no fiber,
> it may have a fake link up because there may be interference on
> the hardware. This patch adds an anti-shake to avoid the problem.
> And the time of anti-shake is base on tests.
> 
> Fixes: b917078c1c10 ("net: hns: Add ACPI support to check SFP present")
> Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
> Signed-off-by: Jijie Shao <shaojijie@huawei.com>
> ---
>  .../net/ethernet/hisilicon/hns/hns_dsaf_mac.c | 29 +++++++++++++++++++
>  1 file changed, 29 insertions(+)
> 
> diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
> index 928d934cb21a..c3abb14edd51 100644
> --- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
> +++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
> @@ -66,6 +66,27 @@ static enum mac_mode hns_get_enet_interface(const struct hns_mac_cb *mac_cb)
>  	}
>  }
>  
> +static void hns_mac_link_anti_shake(struct mac_driver *mac_ctrl_drv,
> +				    u32 *link_status)
> +{

It would be cleaner to return the link status than using output arg IMO

> +#define HNS_MAC_LINK_WAIT_TIME 5
> +#define HNS_MAC_LINK_WAIT_CNT 40
> +
> +	int i;
> +
> +	if (!mac_ctrl_drv->get_link_status) {
> +		*link_status = 0;
> +		return;
> +	}
> +
> +	for (i = 0; i < HNS_MAC_LINK_WAIT_CNT; i++) {
> +		msleep(HNS_MAC_LINK_WAIT_TIME);
> +		mac_ctrl_drv->get_link_status(mac_ctrl_drv, link_status);
> +		if (!*link_status)
> +			break;
> +	}
> +}
> +
>  void hns_mac_get_link_status(struct hns_mac_cb *mac_cb, u32 *link_status)
>  {
>  	struct mac_driver *mac_ctrl_drv;
> @@ -83,6 +104,14 @@ void hns_mac_get_link_status(struct hns_mac_cb *mac_cb, u32 *link_status)
>  							       &sfp_prsnt);
>  		if (!ret)
>  			*link_status = *link_status && sfp_prsnt;
> +
> +		/* for FIBER port, it may have a fake link up.
> +		 * when the link status changes from down to up, we need to do
> +		 * anti-shake. the anti-shake time is base on tests.
> +		 * only FIBER port need to do this.
> +		 */
> +		if (*link_status && !mac_cb->link)
> +			hns_mac_link_anti_shake(mac_ctrl_drv, link_status);
>  	}
>  
>  	mac_cb->link = *link_status;

Re: [PATCH V2 net 1/2] net: hns: fix wrong head when modify the tx feature when sending packets

[Jijie Shao]

on 2023/12/4 18:15, Wojciech Drewek wrote:
>
> On 04.12.2023 02:10, Jijie Shao wrote:
>> From: Yonglong Liu <liuyonglong@huawei.com>
>>
>> When modify the tx feature, the hns driver will modify the
> Upon changing the...
>
>> maybe_stop_tx() and fill_desc() functions, if the modify happens
>> during packet sending, will cause the hardware and software
>> pointers do not match, and the port can not work anymore.
>>
>> This patch deletes the maybe_stop_tx() and fill_desc() functions
>> modification when setting tx feature, and use the skb_is_gro()
>> to determine use tso functions or non-tso functions when packets
>> sending.
> and use the skb_is_gro() to determine which functions to use in the tx path.
>> Fixes: 38f616da1c28 ("net:hns: Add support of ethtool TSO set option for Hip06 in HNS")
>> Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
>> Signed-off-by: Jijie Shao <shaojijie@huawei.com>
>> ---
> Some commit msg suggestions, other than that:
> Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
>
Thanks，
   commit msg is refined in v3
   Jijie

Re: [PATCH V2 net 2/2] net: hns: fix fake link up on xge port

[Jijie Shao]

on 2023/12/4 18:19, Wojciech Drewek wrote:
>
> On 04.12.2023 02:10, Jijie Shao wrote:
>>   
>> +static void hns_mac_link_anti_shake(struct mac_driver *mac_ctrl_drv,
>> +				    u32 *link_status)
>> +{
> It would be cleaner to return the link status than using output arg IMO
>
Yes, it's a good suggestion, and this is modified in v3