Merge branch 'net-ti-ethernet-warnings'

Simon Horman says:

====================
net: ethernet: ti: Address some warnings

This patchset addresses some warnings flagged by Sparse, and clang-18 in
TI Ethernet drivers.

Although these changes do not alter the functionality of the code, by
addressing them real problems introduced in future which are flagged by
tooling will stand out more readily.

Compile tested only.

---
Changes in v2:
- Dropped patch to directly address __percpu Sparse warnings and, instead
- Add patch to use tstats
- Added tags
- Thanks to all for the review of v1
- Link to v1: https://lore.kernel.org/r/20240910-ti-warn-v1-0-afd1e404abbe@kernel.org
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 30 insertions, 103 deletions

diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index aee98ffcf093..cda7ddfe6845 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
@@ -1031,9 +1031,7 @@ static int am65_cpsw_run_xdp(struct am65_cpsw_rx_flow *flow,
 			     int desc_idx, int cpu, int *len)
 {
 	struct am65_cpsw_common *common = flow->common;
-	struct am65_cpsw_ndev_priv *ndev_priv;
 	struct net_device *ndev = port->ndev;
-	struct am65_cpsw_ndev_stats *stats;
 	int ret = AM65_CPSW_XDP_CONSUMED;
 	struct am65_cpsw_tx_chn *tx_chn;
 	struct netdev_queue *netif_txq;
@@ -1051,9 +1049,6 @@ static int am65_cpsw_run_xdp(struct am65_cpsw_rx_flow *flow,
 	/* XDP prog might have changed packet data and boundaries */
 	*len = xdp->data_end - xdp->data;
 
-	ndev_priv = netdev_priv(ndev);
-	stats = this_cpu_ptr(ndev_priv->stats);
-
 	switch (act) {
 	case XDP_PASS:
 		ret = AM65_CPSW_XDP_PASS;
@@ -1073,20 +1068,14 @@ static int am65_cpsw_run_xdp(struct am65_cpsw_rx_flow *flow,
 		if (err)
 			goto drop;
 
-		u64_stats_update_begin(&stats->syncp);
-		stats->rx_bytes += *len;
-		stats->rx_packets++;
-		u64_stats_update_end(&stats->syncp);
+		dev_sw_netstats_tx_add(ndev, 1, *len);
 		ret = AM65_CPSW_XDP_CONSUMED;
 		goto out;
 	case XDP_REDIRECT:
 		if (unlikely(xdp_do_redirect(ndev, xdp, prog)))
 			goto drop;
 
-		u64_stats_update_begin(&stats->syncp);
-		stats->rx_bytes += *len;
-		stats->rx_packets++;
-		u64_stats_update_end(&stats->syncp);
+		dev_sw_netstats_rx_add(ndev, *len);
 		ret = AM65_CPSW_XDP_REDIRECT;
 		goto out;
 	default:
@@ -1147,7 +1136,6 @@ static int am65_cpsw_nuss_rx_packets(struct am65_cpsw_rx_flow *flow,
 	u32 buf_dma_len, pkt_len, port_id = 0, csum_info;
 	struct am65_cpsw_common *common = flow->common;
 	struct am65_cpsw_ndev_priv *ndev_priv;
-	struct am65_cpsw_ndev_stats *stats;
 	struct cppi5_host_desc_t *desc_rx;
 	struct device *dev = common->dev;
 	struct page *page, *new_page;
@@ -1233,12 +1221,7 @@ static int am65_cpsw_nuss_rx_packets(struct am65_cpsw_rx_flow *flow,
 	am65_cpsw_nuss_rx_csum(skb, csum_info);
 	napi_gro_receive(&flow->napi_rx, skb);
 
-	stats = this_cpu_ptr(ndev_priv->stats);
-
-	u64_stats_update_begin(&stats->syncp);
-	stats->rx_packets++;
-	stats->rx_bytes += pkt_len;
-	u64_stats_update_end(&stats->syncp);
+	dev_sw_netstats_rx_add(ndev, pkt_len);
 
 allocate:
 	new_page = page_pool_dev_alloc_pages(flow->page_pool);
@@ -1321,10 +1304,7 @@ static struct sk_buff *
 am65_cpsw_nuss_tx_compl_packet_skb(struct am65_cpsw_tx_chn *tx_chn,
 				   dma_addr_t desc_dma)
 {
-	struct am65_cpsw_ndev_priv *ndev_priv;
-	struct am65_cpsw_ndev_stats *stats;
 	struct cppi5_host_desc_t *desc_tx;
-	struct net_device *ndev;
 	struct sk_buff *skb;
 	void **swdata;
 
@@ -1334,16 +1314,9 @@ am65_cpsw_nuss_tx_compl_packet_skb(struct am65_cpsw_tx_chn *tx_chn,
 	skb = *(swdata);
 	am65_cpsw_nuss_xmit_free(tx_chn, desc_tx);
 
-	ndev = skb->dev;
-
 	am65_cpts_tx_timestamp(tx_chn->common->cpts, skb);
 
-	ndev_priv = netdev_priv(ndev);
-	stats = this_cpu_ptr(ndev_priv->stats);
-	u64_stats_update_begin(&stats->syncp);
-	stats->tx_packets++;
-	stats->tx_bytes += skb->len;
-	u64_stats_update_end(&stats->syncp);
+	dev_sw_netstats_tx_add(skb->dev, 1, skb->len);
 
 	return skb;
 }
@@ -1354,8 +1327,6 @@ am65_cpsw_nuss_tx_compl_packet_xdp(struct am65_cpsw_common *common,
 				   dma_addr_t desc_dma,
 				   struct net_device **ndev)
 {
-	struct am65_cpsw_ndev_priv *ndev_priv;
-	struct am65_cpsw_ndev_stats *stats;
 	struct cppi5_host_desc_t *desc_tx;
 	struct am65_cpsw_port *port;
 	struct xdp_frame *xdpf;
@@ -1369,14 +1340,7 @@ am65_cpsw_nuss_tx_compl_packet_xdp(struct am65_cpsw_common *common,
 	am65_cpsw_nuss_xmit_free(tx_chn, desc_tx);
 
 	port = am65_common_get_port(common, port_id);
-	*ndev = port->ndev;
-
-	ndev_priv = netdev_priv(*ndev);
-	stats = this_cpu_ptr(ndev_priv->stats);
-	u64_stats_update_begin(&stats->syncp);
-	stats->tx_packets++;
-	stats->tx_bytes += xdpf->len;
-	u64_stats_update_end(&stats->syncp);
+	dev_sw_netstats_tx_add(port->ndev, 1, xdpf->len);
 
 	return xdpf;
 }
@@ -1899,31 +1863,7 @@ static int am65_cpsw_nuss_ndo_slave_ioctl(struct net_device *ndev,
 static void am65_cpsw_nuss_ndo_get_stats(struct net_device *dev,
 					 struct rtnl_link_stats64 *stats)
 {
-	struct am65_cpsw_ndev_priv *ndev_priv = netdev_priv(dev);
-	unsigned int start;
-	int cpu;
-
-	for_each_possible_cpu(cpu) {
-		struct am65_cpsw_ndev_stats *cpu_stats;
-		u64 rx_packets;
-		u64 rx_bytes;
-		u64 tx_packets;
-		u64 tx_bytes;
-
-		cpu_stats = per_cpu_ptr(ndev_priv->stats, cpu);
-		do {
-			start = u64_stats_fetch_begin(&cpu_stats->syncp);
-			rx_packets = cpu_stats->rx_packets;
-			rx_bytes   = cpu_stats->rx_bytes;
-			tx_packets = cpu_stats->tx_packets;
-			tx_bytes   = cpu_stats->tx_bytes;
-		} while (u64_stats_fetch_retry(&cpu_stats->syncp, start));
-
-		stats->rx_packets += rx_packets;
-		stats->rx_bytes   += rx_bytes;
-		stats->tx_packets += tx_packets;
-		stats->tx_bytes   += tx_bytes;
-	}
+	dev_fetch_sw_netstats(stats, dev->tstats);
 
 	stats->rx_errors	= dev->stats.rx_errors;
 	stats->rx_dropped	= dev->stats.rx_dropped;
@@ -2710,13 +2650,6 @@ of_node_put:
 	return ret;
 }
 
-static void am65_cpsw_pcpu_stats_free(void *data)
-{
-	struct am65_cpsw_ndev_stats __percpu *stats = data;
-
-	free_percpu(stats);
-}
-
 static void am65_cpsw_nuss_phylink_cleanup(struct am65_cpsw_common *common)
 {
 	struct am65_cpsw_port *port;
@@ -2736,7 +2669,6 @@ am65_cpsw_nuss_init_port_ndev(struct am65_cpsw_common *common, u32 port_idx)
 	struct device *dev = common->dev;
 	struct am65_cpsw_port *port;
 	struct phylink *phylink;
-	int ret;
 
 	port = &common->ports[port_idx];
 
@@ -2829,21 +2761,13 @@ am65_cpsw_nuss_init_port_ndev(struct am65_cpsw_common *common, u32 port_idx)
 	if (common->pdata.quirks & AM65_CPSW_QUIRK_I2027_NO_TX_CSUM)
 		port->ndev->features &= ~NETIF_F_HW_CSUM;
 
-	ndev_priv->stats = netdev_alloc_pcpu_stats(struct am65_cpsw_ndev_stats);
-	if (!ndev_priv->stats)
-		return -ENOMEM;
-
-	ret = devm_add_action_or_reset(dev, am65_cpsw_pcpu_stats_free,
-				       ndev_priv->stats);
-	if (ret)
-		dev_err(dev, "failed to add percpu stat free action %d\n", ret);
-
+	port->ndev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS;
 	port->xdp_prog = NULL;
 
 	if (!common->dma_ndev)
 		common->dma_ndev = port->ndev;
 
-	return ret;
+	return 0;
 }
 
 static int am65_cpsw_nuss_init_ndevs(struct am65_cpsw_common *common)
@@ -3500,7 +3424,7 @@ static int am65_cpsw_nuss_probe(struct platform_device *pdev)
 	struct resource *res;
 	struct clk *clk;
 	int ale_entries;
-	u64 id_temp;
+	__be64 id_temp;
 	int ret, i;
 
 	common = devm_kzalloc(dev, sizeof(struct am65_cpsw_common), GFP_KERNEL);
diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.h b/drivers/net/ethernet/ti/am65-cpsw-nuss.h
index dc8d544230dc..3f3e353dfe88 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.h
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.h
@@ -180,18 +180,9 @@ struct am65_cpsw_common {
 	u32			*ale_context;
 };
 
-struct am65_cpsw_ndev_stats {
-	u64 tx_packets;
-	u64 tx_bytes;
-	u64 rx_packets;
-	u64 rx_bytes;
-	struct u64_stats_sync syncp;
-};
-
 struct am65_cpsw_ndev_priv {
 	u32			msg_enable;
 	struct am65_cpsw_port	*port;
-	struct am65_cpsw_ndev_stats __percpu *stats;
 	bool offload_fwd_mark;
 	/* Serialize access to MAC Merge state between ethtool requests
 	 * and link state updates
diff --git a/drivers/net/ethernet/ti/cpsw_ale.c b/drivers/net/ethernet/ti/cpsw_ale.c
index 8d02d2b21429..d361caa80d05 100644
--- a/drivers/net/ethernet/ti/cpsw_ale.c
+++ b/drivers/net/ethernet/ti/cpsw_ale.c
@@ -162,27 +162,39 @@ static inline void cpsw_ale_set_field(u32 *ale_entry, u32 start, u32 bits,
 	ale_entry[idx] |=  (value << start);
 }
 
-#define DEFINE_ALE_FIELD(name, start, bits)				\
+#define DEFINE_ALE_FIELD_GET(name, start, bits)				\
 static inline int cpsw_ale_get_##name(u32 *ale_entry)			\
 {									\
 	return cpsw_ale_get_field(ale_entry, start, bits);		\
-}									\
+}
+
+#define DEFINE_ALE_FIELD_SET(name, start, bits)				\
 static inline void cpsw_ale_set_##name(u32 *ale_entry, u32 value)	\
 {									\
 	cpsw_ale_set_field(ale_entry, start, bits, value);		\
 }
 
-#define DEFINE_ALE_FIELD1(name, start)					\
+#define DEFINE_ALE_FIELD(name, start, bits)				\
+DEFINE_ALE_FIELD_GET(name, start, bits)					\
+DEFINE_ALE_FIELD_SET(name, start, bits)
+
+#define DEFINE_ALE_FIELD1_GET(name, start)				\
 static inline int cpsw_ale_get_##name(u32 *ale_entry, u32 bits)		\
 {									\
 	return cpsw_ale_get_field(ale_entry, start, bits);		\
-}									\
+}
+
+#define DEFINE_ALE_FIELD1_SET(name, start)				\
 static inline void cpsw_ale_set_##name(u32 *ale_entry, u32 value,	\
 		u32 bits)						\
 {									\
 	cpsw_ale_set_field(ale_entry, start, bits, value);		\
 }
 
+#define DEFINE_ALE_FIELD1(name, start)					\
+DEFINE_ALE_FIELD1_GET(name, start)					\
+DEFINE_ALE_FIELD1_SET(name, start)
+
 enum {
 	ALE_ENT_VID_MEMBER_LIST = 0,
 	ALE_ENT_VID_UNREG_MCAST_MSK,
@@ -238,14 +250,14 @@ static const struct ale_entry_fld vlan_entry_k3_cpswxg[] = {
 
 DEFINE_ALE_FIELD(entry_type,		60,	2)
 DEFINE_ALE_FIELD(vlan_id,		48,	12)
-DEFINE_ALE_FIELD(mcast_state,		62,	2)
+DEFINE_ALE_FIELD_SET(mcast_state,	62,	2)
 DEFINE_ALE_FIELD1(port_mask,		66)
 DEFINE_ALE_FIELD(super,			65,	1)
 DEFINE_ALE_FIELD(ucast_type,		62,     2)
-DEFINE_ALE_FIELD1(port_num,		66)
-DEFINE_ALE_FIELD(blocked,		65,     1)
-DEFINE_ALE_FIELD(secure,		64,     1)
-DEFINE_ALE_FIELD(mcast,			40,	1)
+DEFINE_ALE_FIELD1_SET(port_num,		66)
+DEFINE_ALE_FIELD_SET(blocked,		65,     1)
+DEFINE_ALE_FIELD_SET(secure,		64,     1)
+DEFINE_ALE_FIELD_GET(mcast,		40,	1)
 
 #define NU_VLAN_UNREG_MCAST_IDX	1