Merge branch 'thunderx-xdp'

Sunil Goutham says:

====================
net: thunderx: Adds XDP support

This patch series adds support for XDP to ThunderX NIC driver
which is used on CN88xx, CN81xx and CN83xx platforms.

Patches 1-4 are performance improvement and cleanup patches
which are done keeping XDP performance bottlenecks in view.
Rest of the patches adds actual XDP support.
====================

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

drivers/net/ethernet/cavium/thunder/nic.h

@@ -252,12 +252,14 @@ struct nicvf_drv_stats {
 	u64 tx_csum_overflow;
 
 	/* driver debug stats */
-	u64 rcv_buffer_alloc_failures;
 	u64 tx_tso;
 	u64 tx_timeout;
 	u64 txq_stop;
 	u64 txq_wake;
 
+	u64 rcv_buffer_alloc_failures;
+	u64 page_alloc;
+
 	struct u64_stats_sync   syncp;
 };
 
@@ -266,9 +268,9 @@ struct nicvf {
 	struct net_device	*netdev;
 	struct pci_dev		*pdev;
 	void __iomem		*reg_base;
+	struct bpf_prog         *xdp_prog;
 #define	MAX_QUEUES_PER_QSET			8
 	struct queue_set	*qs;
-	struct nicvf_cq_poll	*napi[8];
 	void			*iommu_domain;
 	u8			vf_id;
 	u8			sqs_id;
@@ -294,6 +296,7 @@ struct nicvf {
 	/* Queue count */
 	u8			rx_queues;
 	u8			tx_queues;
+	u8			xdp_tx_queues;
 	u8			max_queues;
 
 	u8			node;
@@ -318,6 +321,9 @@ struct nicvf {
 	struct nicvf_drv_stats  __percpu *drv_stats;
 	struct bgx_stats	bgx_stats;
 
+	/* Napi */
+	struct nicvf_cq_poll	*napi[8];
+
 	/* MSI-X  */
 	u8			num_vec;
 	char			irq_name[NIC_VF_MSIX_VECTORS][IFNAMSIZ + 15];

drivers/net/ethernet/cavium/thunder/nicvf_ethtool.c

@@ -100,11 +100,12 @@ static const struct nicvf_stat nicvf_drv_stats[] = {
 	NICVF_DRV_STAT(tx_csum_overlap),
 	NICVF_DRV_STAT(tx_csum_overflow),
 
-	NICVF_DRV_STAT(rcv_buffer_alloc_failures),
 	NICVF_DRV_STAT(tx_tso),
 	NICVF_DRV_STAT(tx_timeout),
 	NICVF_DRV_STAT(txq_stop),
 	NICVF_DRV_STAT(txq_wake),
+	NICVF_DRV_STAT(rcv_buffer_alloc_failures),
+	NICVF_DRV_STAT(page_alloc),
 };
 
 static const struct nicvf_stat nicvf_queue_stats[] = {
@@ -720,7 +721,7 @@ static int nicvf_set_channels(struct net_device *dev,
 	struct nicvf *nic = netdev_priv(dev);
 	int err = 0;
 	bool if_up = netif_running(dev);
-	int cqcount;
+	u8 cqcount, txq_count;
 
 	if (!channel->rx_count || !channel->tx_count)
 		return -EINVAL;
@@ -729,10 +730,26 @@ static int nicvf_set_channels(struct net_device *dev,
 	if (channel->tx_count > nic->max_queues)
 		return -EINVAL;
 
+	if (nic->xdp_prog &&
+	    ((channel->tx_count + channel->rx_count) > nic->max_queues)) {
+		netdev_err(nic->netdev,
+			   "XDP mode, RXQs + TXQs > Max %d\n",
+			   nic->max_queues);
+		return -EINVAL;
+	}
+
 	if (if_up)
 		nicvf_stop(dev);
 
-	cqcount = max(channel->rx_count, channel->tx_count);
+	nic->rx_queues = channel->rx_count;
+	nic->tx_queues = channel->tx_count;
+	if (!nic->xdp_prog)
+		nic->xdp_tx_queues = 0;
+	else
+		nic->xdp_tx_queues = channel->rx_count;
+
+	txq_count = nic->xdp_tx_queues + nic->tx_queues;
+	cqcount = max(nic->rx_queues, txq_count);
 
 	if (cqcount > MAX_CMP_QUEUES_PER_QS) {
 		nic->sqs_count = roundup(cqcount, MAX_CMP_QUEUES_PER_QS);
@@ -741,12 +758,10 @@ static int nicvf_set_channels(struct net_device *dev,
 		nic->sqs_count = 0;
 	}
 
-	nic->qs->rq_cnt = min_t(u32, channel->rx_count, MAX_RCV_QUEUES_PER_QS);
-	nic->qs->sq_cnt = min_t(u32, channel->tx_count, MAX_SND_QUEUES_PER_QS);
+	nic->qs->rq_cnt = min_t(u8, nic->rx_queues, MAX_RCV_QUEUES_PER_QS);
+	nic->qs->sq_cnt = min_t(u8, txq_count, MAX_SND_QUEUES_PER_QS);
 	nic->qs->cq_cnt = max(nic->qs->rq_cnt, nic->qs->sq_cnt);
 
-	nic->rx_queues = channel->rx_count;
-	nic->tx_queues = channel->tx_count;
 	err = nicvf_set_real_num_queues(dev, nic->tx_queues, nic->rx_queues);
 	if (err)
 		return err;