sfc: account XDP TXes in netdev base stats

When we handle a TX completion for an XDP packet, it is not counted
in the per-TXQ netdev stats. Record it in new internal counters,
and include those in the device-wide total in efx_get_base_stats().

Signed-off-by: Edward Cree <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/sfc/efx.c

···
 				tx->packets += tx_queue->old_complete_packets;
 				tx->bytes += tx_queue->old_complete_bytes;
 			}
+			/* Include XDP TX in device-wide stats */
+			tx->packets += tx_queue->complete_xdp_packets;
+			tx->bytes += tx_queue->complete_xdp_bytes;
 		}
 	}
 }

drivers/net/ethernet/sfc/net_driver.h

···
  *	created.  For TSO, counts the superframe size, not the sizes of
  *	generated frames on the wire (i.e. the headers are only counted
  *	once)
+ * @complete_xdp_packets: Number of XDP TX packets completed since this
+ *	struct was created.
+ * @complete_xdp_bytes: Number of XDP TX bytes completed since this
+ *	struct was created.
  * @completed_timestamp_major: Top part of the most recent tx timestamp.
  * @completed_timestamp_minor: Low part of the most recent tx timestamp.
  * @insert_count: Current insert pointer
···
 	unsigned int pkts_compl;
 	unsigned long complete_packets;
 	unsigned long complete_bytes;
+	unsigned long complete_xdp_packets;
+	unsigned long complete_xdp_bytes;
 	u32 completed_timestamp_major;
 	u32 completed_timestamp_minor;
 

drivers/net/ethernet/sfc/tx.c

···
 
 void efx_xmit_done_single(struct efx_tx_queue *tx_queue)
 {
+	unsigned int xdp_pkts_compl = 0, xdp_bytes_compl = 0;
 	unsigned int pkts_compl = 0, bytes_compl = 0;
 	unsigned int efv_pkts_compl = 0;
 	unsigned int read_ptr;
···
 		if (buffer->flags & EFX_TX_BUF_SKB)
 			finished = true;
 		efx_dequeue_buffer(tx_queue, buffer, &pkts_compl, &bytes_compl,
-				   &efv_pkts_compl);
+				   &efv_pkts_compl, &xdp_pkts_compl,
+				   &xdp_bytes_compl);
 
 		++tx_queue->read_count;
 		read_ptr = tx_queue->read_count & tx_queue->ptr_mask;
···
 
 	tx_queue->pkts_compl += pkts_compl;
 	tx_queue->bytes_compl += bytes_compl;
+	tx_queue->complete_xdp_packets += xdp_pkts_compl;
+	tx_queue->complete_xdp_bytes += xdp_bytes_compl;
 
 	EFX_WARN_ON_PARANOID(pkts_compl + efv_pkts_compl != 1);
 

drivers/net/ethernet/sfc/tx_common.c

···
 
 	/* Free any buffers left in the ring */
 	while (tx_queue->read_count != tx_queue->write_count) {
+		unsigned int xdp_pkts_compl = 0, xdp_bytes_compl = 0;
 		unsigned int pkts_compl = 0, bytes_compl = 0;
 		unsigned int efv_pkts_compl = 0;
 
 		buffer = &tx_queue->buffer[tx_queue->read_count & tx_queue->ptr_mask];
 		efx_dequeue_buffer(tx_queue, buffer, &pkts_compl, &bytes_compl,
-				   &efv_pkts_compl);
+				   &efv_pkts_compl, &xdp_pkts_compl,
+				   &xdp_bytes_compl);
 
 		++tx_queue->read_count;
 	}
···
 			struct efx_tx_buffer *buffer,
 			unsigned int *pkts_compl,
 			unsigned int *bytes_compl,
-			unsigned int *efv_pkts_compl)
+			unsigned int *efv_pkts_compl,
+			unsigned int *xdp_pkts,
+			unsigned int *xdp_bytes)
 {
 	if (buffer->unmap_len) {
 		struct device *dma_dev = &tx_queue->efx->pci_dev->dev;
···
 			   tx_queue->queue, tx_queue->read_count);
 	} else if (buffer->flags & EFX_TX_BUF_XDP) {
 		xdp_return_frame_rx_napi(buffer->xdpf);
+		if (xdp_pkts)
+			(*xdp_pkts)++;
+		if (xdp_bytes)
+			(*xdp_bytes) += buffer->xdpf->len;
 	}
 
 	buffer->len = 0;
···
 				unsigned int index,
 				unsigned int *pkts_compl,
 				unsigned int *bytes_compl,
-				unsigned int *efv_pkts_compl)
+				unsigned int *efv_pkts_compl,
+				unsigned int *xdp_pkts,
+				unsigned int *xdp_bytes)
 {
 	struct efx_nic *efx = tx_queue->efx;
 	unsigned int stop_index, read_ptr;
···
 		}
 
 		efx_dequeue_buffer(tx_queue, buffer, pkts_compl, bytes_compl,
-				   efv_pkts_compl);
+				   efv_pkts_compl, xdp_pkts, xdp_bytes);
 
 		++tx_queue->read_count;
 		read_ptr = tx_queue->read_count & tx_queue->ptr_mask;
···
 int efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index)
 {
 	unsigned int fill_level, pkts_compl = 0, bytes_compl = 0;
+	unsigned int xdp_pkts_compl = 0, xdp_bytes_compl = 0;
 	unsigned int efv_pkts_compl = 0;
 	struct efx_nic *efx = tx_queue->efx;
 
 	EFX_WARN_ON_ONCE_PARANOID(index > tx_queue->ptr_mask);
 
 	efx_dequeue_buffers(tx_queue, index, &pkts_compl, &bytes_compl,
-			    &efv_pkts_compl);
+			    &efv_pkts_compl, &xdp_pkts_compl, &xdp_bytes_compl);
 	tx_queue->pkts_compl += pkts_compl;
 	tx_queue->bytes_compl += bytes_compl;
+	tx_queue->complete_xdp_packets += xdp_pkts_compl;
+	tx_queue->complete_xdp_bytes += xdp_bytes_compl;
 
 	if (pkts_compl + efv_pkts_compl > 1)
 		++tx_queue->merge_events;
···
 void efx_enqueue_unwind(struct efx_tx_queue *tx_queue,
 			unsigned int insert_count)
 {
+	unsigned int xdp_bytes_compl = 0;
+	unsigned int xdp_pkts_compl = 0;
 	unsigned int efv_pkts_compl = 0;
 	struct efx_tx_buffer *buffer;
 	unsigned int bytes_compl = 0;
···
 		--tx_queue->insert_count;
 		buffer = __efx_tx_queue_get_insert_buffer(tx_queue);
 		efx_dequeue_buffer(tx_queue, buffer, &pkts_compl, &bytes_compl,
-				   &efv_pkts_compl);
+				   &efv_pkts_compl, &xdp_pkts_compl,
+				   &xdp_bytes_compl);
 	}
 }
 

drivers/net/ethernet/sfc/tx_common.h

···
 			struct efx_tx_buffer *buffer,
 			unsigned int *pkts_compl,
 			unsigned int *bytes_compl,
-			unsigned int *efv_pkts_compl);
+			unsigned int *efv_pkts_compl,
+			unsigned int *xdp_pkts,
+			unsigned int *xdp_bytes);
 
 static inline bool efx_tx_buffer_in_use(struct efx_tx_buffer *buffer)
 {