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[PATCH net-next] net: hisilicon: hns3: use ethtool string helpers

Rosen Penev posted 1 patch 3 weeks, 1 day ago
There is a newer version of this series
drivers/net/ethernet/hisilicon/hns3/hnae3.h   |  2 +-
.../hns3/hns3_common/hclge_comm_tqp_stats.c   | 11 ++--
.../hns3/hns3_common/hclge_comm_tqp_stats.h   |  2 +-
.../ethernet/hisilicon/hns3/hns3_ethtool.c    | 53 ++++++-------------
.../hisilicon/hns3/hns3pf/hclge_main.c        | 50 +++++++----------
.../hisilicon/hns3/hns3vf/hclgevf_main.c      |  6 +--
6 files changed, 44 insertions(+), 80 deletions(-)
[PATCH net-next] net: hisilicon: hns3: use ethtool string helpers
Posted by Rosen Penev 3 weeks, 1 day ago 
The latter is the preferred way to copy ethtool strings.

Avoids manually incrementing the pointer. Cleans up the code quite well.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Jijie Shao <shaojijie@huawei.com>
Tested-by: Jijie Shao <shaojijie@huawei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hnae3.h   |  2 +-
 .../hns3/hns3_common/hclge_comm_tqp_stats.c   | 11 ++--
 .../hns3/hns3_common/hclge_comm_tqp_stats.h   |  2 +-
 .../ethernet/hisilicon/hns3/hns3_ethtool.c    | 53 ++++++-------------
 .../hisilicon/hns3/hns3pf/hclge_main.c        | 50 +++++++----------
 .../hisilicon/hns3/hns3vf/hclgevf_main.c      |  6 +--
 6 files changed, 44 insertions(+), 80 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hnae3.h b/drivers/net/ethernet/hisilicon/hns3/hnae3.h
index 27dbe367f3d3..710a8f9f2248 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hnae3.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hnae3.h
@@ -677,7 +677,7 @@ struct hnae3_ae_ops {
 	void (*get_mac_stats)(struct hnae3_handle *handle,
 			      struct hns3_mac_stats *mac_stats);
 	void (*get_strings)(struct hnae3_handle *handle,
-			    u32 stringset, u8 *data);
+			    u32 stringset, u8 **data);
 	int (*get_sset_count)(struct hnae3_handle *handle, int stringset);
 
 	void (*get_regs)(struct hnae3_handle *handle, u32 *version,
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_common/hclge_comm_tqp_stats.c b/drivers/net/ethernet/hisilicon/hns3/hns3_common/hclge_comm_tqp_stats.c
index 2b31188ff555..f9a3d6fc4416 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_common/hclge_comm_tqp_stats.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_common/hclge_comm_tqp_stats.c
@@ -36,27 +36,22 @@ int hclge_comm_tqps_get_sset_count(struct hnae3_handle *handle)
 }
 EXPORT_SYMBOL_GPL(hclge_comm_tqps_get_sset_count);
 
-u8 *hclge_comm_tqps_get_strings(struct hnae3_handle *handle, u8 *data)
+void hclge_comm_tqps_get_strings(struct hnae3_handle *handle, u8 **data)
 {
 	struct hnae3_knic_private_info *kinfo = &handle->kinfo;
-	u8 *buff = data;
 	u16 i;
 
 	for (i = 0; i < kinfo->num_tqps; i++) {
 		struct hclge_comm_tqp *tqp =
 			container_of(kinfo->tqp[i], struct hclge_comm_tqp, q);
-		snprintf(buff, ETH_GSTRING_LEN, "txq%u_pktnum_rcd", tqp->index);
-		buff += ETH_GSTRING_LEN;
+		ethtool_sprintf(data, "txq%u_pktnum_rcd", tqp->index);
 	}
 
 	for (i = 0; i < kinfo->num_tqps; i++) {
 		struct hclge_comm_tqp *tqp =
 			container_of(kinfo->tqp[i], struct hclge_comm_tqp, q);
-		snprintf(buff, ETH_GSTRING_LEN, "rxq%u_pktnum_rcd", tqp->index);
-		buff += ETH_GSTRING_LEN;
+		ethtool_sprintf(data, "rxq%u_pktnum_rcd", tqp->index);
 	}
-
-	return buff;
 }
 EXPORT_SYMBOL_GPL(hclge_comm_tqps_get_strings);
 
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_common/hclge_comm_tqp_stats.h b/drivers/net/ethernet/hisilicon/hns3/hns3_common/hclge_comm_tqp_stats.h
index a46350162ee8..b9ff424c0bc2 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_common/hclge_comm_tqp_stats.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_common/hclge_comm_tqp_stats.h
@@ -32,7 +32,7 @@ struct hclge_comm_tqp {
 
 u64 *hclge_comm_tqps_get_stats(struct hnae3_handle *handle, u64 *data);
 int hclge_comm_tqps_get_sset_count(struct hnae3_handle *handle);
-u8 *hclge_comm_tqps_get_strings(struct hnae3_handle *handle, u8 *data);
+void hclge_comm_tqps_get_strings(struct hnae3_handle *handle, u8 **data);
 void hclge_comm_reset_tqp_stats(struct hnae3_handle *handle);
 int hclge_comm_tqps_update_stats(struct hnae3_handle *handle,
 				 struct hclge_comm_hw *hw);
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
index 97eaeec1952b..b6cc51bfdd33 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
@@ -509,54 +509,38 @@ static int hns3_get_sset_count(struct net_device *netdev, int stringset)
 	}
 }
 
-static void *hns3_update_strings(u8 *data, const struct hns3_stats *stats,
-		u32 stat_count, u32 num_tqps, const char *prefix)
+static void hns3_update_strings(u8 **data, const struct hns3_stats *stats,
+				u32 stat_count, u32 num_tqps,
+				const char *prefix)
 {
 #define MAX_PREFIX_SIZE (6 + 4)
-	u32 size_left;
 	u32 i, j;
-	u32 n1;
 
-	for (i = 0; i < num_tqps; i++) {
-		for (j = 0; j < stat_count; j++) {
-			data[ETH_GSTRING_LEN - 1] = '\0';
-
-			/* first, prepend the prefix string */
-			n1 = scnprintf(data, MAX_PREFIX_SIZE, "%s%u_",
-				       prefix, i);
-			size_left = (ETH_GSTRING_LEN - 1) - n1;
-
-			/* now, concatenate the stats string to it */
-			strncat(data, stats[j].stats_string, size_left);
-			data += ETH_GSTRING_LEN;
-		}
-	}
-
-	return data;
+	for (i = 0; i < num_tqps; i++)
+		for (j = 0; j < stat_count; j++)
+			ethtool_sprintf(data, "%s%u_%s", prefix, i,
+					stats[j].stats_string);
 }
 
-static u8 *hns3_get_strings_tqps(struct hnae3_handle *handle, u8 *data)
+static void hns3_get_strings_tqps(struct hnae3_handle *handle, u8 **data)
 {
 	struct hnae3_knic_private_info *kinfo = &handle->kinfo;
 	const char tx_prefix[] = "txq";
 	const char rx_prefix[] = "rxq";
 
 	/* get strings for Tx */
-	data = hns3_update_strings(data, hns3_txq_stats, HNS3_TXQ_STATS_COUNT,
-				   kinfo->num_tqps, tx_prefix);
+	hns3_update_strings(data, hns3_txq_stats, HNS3_TXQ_STATS_COUNT,
+			    kinfo->num_tqps, tx_prefix);
 
 	/* get strings for Rx */
-	data = hns3_update_strings(data, hns3_rxq_stats, HNS3_RXQ_STATS_COUNT,
-				   kinfo->num_tqps, rx_prefix);
-
-	return data;
+	hns3_update_strings(data, hns3_rxq_stats, HNS3_RXQ_STATS_COUNT,
+			    kinfo->num_tqps, rx_prefix);
 }
 
 static void hns3_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 {
 	struct hnae3_handle *h = hns3_get_handle(netdev);
 	const struct hnae3_ae_ops *ops = h->ae_algo->ops;
-	char *buff = (char *)data;
 	int i;
 
 	if (!ops->get_strings)
@@ -564,18 +548,15 @@ static void hns3_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 
 	switch (stringset) {
 	case ETH_SS_STATS:
-		buff = hns3_get_strings_tqps(h, buff);
-		ops->get_strings(h, stringset, (u8 *)buff);
+		hns3_get_strings_tqps(h, &data);
+		ops->get_strings(h, stringset, &data);
 		break;
 	case ETH_SS_TEST:
-		ops->get_strings(h, stringset, data);
+		ops->get_strings(h, stringset, &data);
 		break;
 	case ETH_SS_PRIV_FLAGS:
-		for (i = 0; i < HNS3_PRIV_FLAGS_LEN; i++) {
-			snprintf(buff, ETH_GSTRING_LEN, "%s",
-				 hns3_priv_flags[i].name);
-			buff += ETH_GSTRING_LEN;
-		}
+		for (i = 0; i < HNS3_PRIV_FLAGS_LEN; i++)
+			ethtool_puts(&data, hns3_priv_flags[i].name);
 		break;
 	default:
 		break;
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 728f4777e51f..5fc08d686d25 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -595,25 +595,21 @@ static u64 *hclge_comm_get_stats(struct hclge_dev *hdev,
 	return buf;
 }
 
-static u8 *hclge_comm_get_strings(struct hclge_dev *hdev, u32 stringset,
-				  const struct hclge_comm_stats_str strs[],
-				  int size, u8 *data)
+static void hclge_comm_get_strings(struct hclge_dev *hdev, u32 stringset,
+				   const struct hclge_comm_stats_str strs[],
+				   int size, u8 **data)
 {
-	char *buff = (char *)data;
 	u32 i;
 
 	if (stringset != ETH_SS_STATS)
-		return buff;
+		return;
 
 	for (i = 0; i < size; i++) {
 		if (strs[i].stats_num > hdev->ae_dev->dev_specs.mac_stats_num)
 			continue;
 
-		snprintf(buff, ETH_GSTRING_LEN, "%s", strs[i].desc);
-		buff = buff + ETH_GSTRING_LEN;
+		ethtool_puts(data, strs[i].desc);
 	}
-
-	return (u8 *)buff;
 }
 
 static void hclge_update_stats_for_all(struct hclge_dev *hdev)
@@ -718,44 +714,38 @@ static int hclge_get_sset_count(struct hnae3_handle *handle, int stringset)
 }
 
 static void hclge_get_strings(struct hnae3_handle *handle, u32 stringset,
-			      u8 *data)
+			      u8 **data)
 {
 	struct hclge_vport *vport = hclge_get_vport(handle);
 	struct hclge_dev *hdev = vport->back;
-	u8 *p = (char *)data;
+	const char *str;
 	int size;
 
 	if (stringset == ETH_SS_STATS) {
 		size = ARRAY_SIZE(g_mac_stats_string);
-		p = hclge_comm_get_strings(hdev, stringset, g_mac_stats_string,
-					   size, p);
-		p = hclge_comm_tqps_get_strings(handle, p);
+		hclge_comm_get_strings(hdev, stringset, g_mac_stats_string,
+				       size, data);
+		hclge_comm_tqps_get_strings(handle, data);
 	} else if (stringset == ETH_SS_TEST) {
 		if (handle->flags & HNAE3_SUPPORT_EXTERNAL_LOOPBACK) {
-			memcpy(p, hns3_nic_test_strs[HNAE3_LOOP_EXTERNAL],
-			       ETH_GSTRING_LEN);
-			p += ETH_GSTRING_LEN;
+			str = hns3_nic_test_strs[HNAE3_LOOP_EXTERNAL];
+			ethtool_puts(data, str);
 		}
 		if (handle->flags & HNAE3_SUPPORT_APP_LOOPBACK) {
-			memcpy(p, hns3_nic_test_strs[HNAE3_LOOP_APP],
-			       ETH_GSTRING_LEN);
-			p += ETH_GSTRING_LEN;
+			str = hns3_nic_test_strs[HNAE3_LOOP_APP];
+			ethtool_puts(data, str);
 		}
 		if (handle->flags & HNAE3_SUPPORT_SERDES_SERIAL_LOOPBACK) {
-			memcpy(p, hns3_nic_test_strs[HNAE3_LOOP_SERIAL_SERDES],
-			       ETH_GSTRING_LEN);
-			p += ETH_GSTRING_LEN;
+			str = hns3_nic_test_strs[HNAE3_LOOP_SERIAL_SERDES];
+			ethtool_puts(data, str);
 		}
 		if (handle->flags & HNAE3_SUPPORT_SERDES_PARALLEL_LOOPBACK) {
-			memcpy(p,
-			       hns3_nic_test_strs[HNAE3_LOOP_PARALLEL_SERDES],
-			       ETH_GSTRING_LEN);
-			p += ETH_GSTRING_LEN;
+			str = hns3_nic_test_strs[HNAE3_LOOP_PARALLEL_SERDES];
+			ethtool_puts(data, str);
 		}
 		if (handle->flags & HNAE3_SUPPORT_PHY_LOOPBACK) {
-			memcpy(p, hns3_nic_test_strs[HNAE3_LOOP_PHY],
-			       ETH_GSTRING_LEN);
-			p += ETH_GSTRING_LEN;
+			str = hns3_nic_test_strs[HNAE3_LOOP_PHY];
+			ethtool_puts(data, str);
 		}
 	}
 }
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
index 896f1eb172d3..8739da317897 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
@@ -130,12 +130,10 @@ static int hclgevf_get_sset_count(struct hnae3_handle *handle, int strset)
 }
 
 static void hclgevf_get_strings(struct hnae3_handle *handle, u32 strset,
-				u8 *data)
+				u8 **data)
 {
-	u8 *p = (char *)data;
-
 	if (strset == ETH_SS_STATS)
-		p = hclge_comm_tqps_get_strings(handle, p);
+		hclge_comm_tqps_get_strings(handle, data);
 }
 
 static void hclgevf_get_stats(struct hnae3_handle *handle, u64 *data)
-- 
2.47.0
Re: [PATCH net-next] net: hisilicon: hns3: use ethtool string helpers
Posted by Simon Horman 2 weeks, 5 days ago 
On Fri, Nov 01, 2024 at 03:00:23PM -0700, Rosen Penev wrote:
> The latter is the preferred way to copy ethtool strings.
> 
> Avoids manually incrementing the pointer. Cleans up the code quite well.
> 
> Signed-off-by: Rosen Penev <rosenp@gmail.com>
> Reviewed-by: Jijie Shao <shaojijie@huawei.com>
> Tested-by: Jijie Shao <shaojijie@huawei.com>

...

> diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
> index 97eaeec1952b..b6cc51bfdd33 100644
> --- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
> +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
> @@ -509,54 +509,38 @@ static int hns3_get_sset_count(struct net_device *netdev, int stringset)
>  	}
>  }
>  
> -static void *hns3_update_strings(u8 *data, const struct hns3_stats *stats,
> -		u32 stat_count, u32 num_tqps, const char *prefix)
> +static void hns3_update_strings(u8 **data, const struct hns3_stats *stats,
> +				u32 stat_count, u32 num_tqps,
> +				const char *prefix)
>  {
>  #define MAX_PREFIX_SIZE (6 + 4)

Hi Rosen,

As per Jakub's feedback on v1, can't this #define be removed?

...
Re: [PATCH net-next] net: hisilicon: hns3: use ethtool string helpers
Posted by Rosen Penev 2 weeks, 5 days ago 
On Tue, Nov 5, 2024 at 6:00 AM Simon Horman <horms@kernel.org> wrote:
>
> On Fri, Nov 01, 2024 at 03:00:23PM -0700, Rosen Penev wrote:
> > The latter is the preferred way to copy ethtool strings.
> >
> > Avoids manually incrementing the pointer. Cleans up the code quite well.
> >
> > Signed-off-by: Rosen Penev <rosenp@gmail.com>
> > Reviewed-by: Jijie Shao <shaojijie@huawei.com>
> > Tested-by: Jijie Shao <shaojijie@huawei.com>
>
> ...
>
> > diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
> > index 97eaeec1952b..b6cc51bfdd33 100644
> > --- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
> > +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
> > @@ -509,54 +509,38 @@ static int hns3_get_sset_count(struct net_device *netdev, int stringset)
> >       }
> >  }
> >
> > -static void *hns3_update_strings(u8 *data, const struct hns3_stats *stats,
> > -             u32 stat_count, u32 num_tqps, const char *prefix)
> > +static void hns3_update_strings(u8 **data, const struct hns3_stats *stats,
> > +                             u32 stat_count, u32 num_tqps,
> > +                             const char *prefix)
> >  {
> >  #define MAX_PREFIX_SIZE (6 + 4)
>
> Hi Rosen,
>
> As per Jakub's feedback on v1, can't this #define be removed?
Removed in v2.
>
> ...

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