Merge: Updates for ibmvnic driver to fix inaccurate SAR reporting

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/7156

Description: Updates for ibmvnic driver to fix inaccurate SAR reporting

JIRA: https://issues.redhat.com/browse/RHEL-104119

Build Info: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=68389703

Tested: Verified Brew build test kernel RPMs

Signed-off-by: Mamatha Inamdar <minamdar@redhat.com>

Approved-by: Michal Schmidt <mschmidt@redhat.com>
Approved-by: Corinna Vinschen <vinschen@redhat.com>
Approved-by: Ivan Vecera <ivecera@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: CKI GitLab Kmaint Pipeline Bot <26919896-cki-kmaint-pipeline-bot@users.noreply.gitlab.com>

Author: CKI KWF Bot

drivers/net/ethernet/ibm/ibmvnic.c

@@ -2103,9 +2103,7 @@ static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter,
 					  tx_pool->num_buffers - 1 :
 					  tx_pool->consumer_index - 1;
 		tx_buff = &tx_pool->tx_buff[index];
-		adapter->netdev->stats.tx_packets--;
-		adapter->netdev->stats.tx_bytes -= tx_buff->skb->len;
-		adapter->tx_stats_buffers[queue_num].packets--;
+		adapter->tx_stats_buffers[queue_num].batched_packets--;
 		adapter->tx_stats_buffers[queue_num].bytes -=
 						tx_buff->skb->len;
 		dev_kfree_skb_any(tx_buff->skb);
@@ -2196,7 +2194,8 @@ static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 	unsigned int tx_map_failed = 0;
 	union sub_crq indir_arr[16];
 	unsigned int tx_dropped = 0;
-	unsigned int tx_packets = 0;
+	unsigned int tx_dpackets = 0;
+	unsigned int tx_bpackets = 0;
 	unsigned int tx_bytes = 0;
 	dma_addr_t data_dma_addr;
 	struct netdev_queue *txq;
@@ -2370,6 +2369,7 @@ static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 		if (lpar_rc != H_SUCCESS)
 			goto tx_err;
 
+		tx_dpackets++;
 		goto early_exit;
 	}
 
@@ -2397,6 +2397,7 @@ static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 		if (lpar_rc != H_SUCCESS)
 			goto tx_err;
 	}
+	tx_bpackets++;
 
 early_exit:
 	if (atomic_add_return(num_entries, &tx_scrq->used)
@@ -2405,7 +2406,6 @@ static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 		netif_stop_subqueue(netdev, queue_num);
 	}
 
-	tx_packets++;
 	tx_bytes += skblen;
 	txq_trans_cond_update(txq);
 	ret = NETDEV_TX_OK;
@@ -2433,12 +2433,10 @@ static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 	}
 out:
 	rcu_read_unlock();
-	netdev->stats.tx_dropped += tx_dropped;
-	netdev->stats.tx_bytes += tx_bytes;
-	netdev->stats.tx_packets += tx_packets;
 	adapter->tx_send_failed += tx_send_failed;
 	adapter->tx_map_failed += tx_map_failed;
-	adapter->tx_stats_buffers[queue_num].packets += tx_packets;
+	adapter->tx_stats_buffers[queue_num].batched_packets += tx_bpackets;
+	adapter->tx_stats_buffers[queue_num].direct_packets += tx_dpackets;
 	adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
 	adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
 
@@ -3237,6 +3235,25 @@ static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
 	return -ret;
 }
 
+static void ibmvnic_get_stats64(struct net_device *netdev,
+				struct rtnl_link_stats64 *stats)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	int i;
+
+	for (i = 0; i < adapter->req_rx_queues; i++) {
+		stats->rx_packets += adapter->rx_stats_buffers[i].packets;
+		stats->rx_bytes   += adapter->rx_stats_buffers[i].bytes;
+	}
+
+	for (i = 0; i < adapter->req_tx_queues; i++) {
+		stats->tx_packets += adapter->tx_stats_buffers[i].batched_packets;
+		stats->tx_packets += adapter->tx_stats_buffers[i].direct_packets;
+		stats->tx_bytes   += adapter->tx_stats_buffers[i].bytes;
+		stats->tx_dropped += adapter->tx_stats_buffers[i].dropped_packets;
+	}
+}
+
 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue)
 {
 	struct ibmvnic_adapter *adapter = netdev_priv(dev);
@@ -3352,8 +3369,6 @@ static int ibmvnic_poll(struct napi_struct *napi, int budget)
 
 		length = skb->len;
 		napi_gro_receive(napi, skb); /* send it up */
-		netdev->stats.rx_packets++;
-		netdev->stats.rx_bytes += length;
 		adapter->rx_stats_buffers[scrq_num].packets++;
 		adapter->rx_stats_buffers[scrq_num].bytes += length;
 		frames_processed++;
@@ -3463,6 +3478,7 @@ static const struct net_device_ops ibmvnic_netdev_ops = {
 	.ndo_set_rx_mode	= ibmvnic_set_multi,
 	.ndo_set_mac_address	= ibmvnic_set_mac,
 	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_get_stats64	= ibmvnic_get_stats64,
 	.ndo_tx_timeout		= ibmvnic_tx_timeout,
 	.ndo_change_mtu		= ibmvnic_change_mtu,
 	.ndo_features_check     = ibmvnic_features_check,
@@ -3627,7 +3643,10 @@ static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
 			memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
 
 		for (i = 0; i < adapter->req_tx_queues; i++) {
-			snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
+			snprintf(data, ETH_GSTRING_LEN, "tx%d_batched_packets", i);
+			data += ETH_GSTRING_LEN;
+
+			snprintf(data, ETH_GSTRING_LEN, "tx%d_direct_packets", i);
 			data += ETH_GSTRING_LEN;
 
 			snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
@@ -3705,7 +3724,9 @@ static void ibmvnic_get_ethtool_stats(struct net_device *dev,
 				      (adapter, ibmvnic_stats[i].offset));
 
 	for (j = 0; j < adapter->req_tx_queues; j++) {
-		data[i] = adapter->tx_stats_buffers[j].packets;
+		data[i] = adapter->tx_stats_buffers[j].batched_packets;
+		i++;
+		data[i] = adapter->tx_stats_buffers[j].direct_packets;
 		i++;
 		data[i] = adapter->tx_stats_buffers[j].bytes;
 		i++;

drivers/net/ethernet/ibm/ibmvnic.h

@@ -175,20 +175,25 @@ struct ibmvnic_statistics {
 	u8 reserved[72];
 } __packed __aligned(8);
 
-#define NUM_TX_STATS 3
 struct ibmvnic_tx_queue_stats {
-	u64 packets;
+	u64 batched_packets;
+	u64 direct_packets;
 	u64 bytes;
 	u64 dropped_packets;
 };
 
-#define NUM_RX_STATS 3
+#define NUM_TX_STATS \
+	(sizeof(struct ibmvnic_tx_queue_stats) / sizeof(u64))
+
 struct ibmvnic_rx_queue_stats {
 	u64 packets;
 	u64 bytes;
 	u64 interrupts;
 };
 
+#define NUM_RX_STATS \
+	(sizeof(struct ibmvnic_rx_queue_stats) / sizeof(u64))
+
 struct ibmvnic_acl_buffer {
 	__be32 len;
 	__be32 version;