sfc: Delegate MAC/NIC statistic description to efx_nic_type

Various hardware statistics that are available for Siena are
unavailable or meaningless for Falcon.  Huntington adds further to the
NIC-type-specific statistics, as it has different MAC blocks from
Falcon/Siena.

All NIC types still provide most statistics by DMA, and use
little-endian byte order.

Therefore:
1. Add some general utility functions for reporting hardware statistics,
   efx_nic_describe_stats() and efx_nic_update_stats().
2. Add an efx_nic_type::describe_stats operation to get the number and
   names of statistics, implemented using efx_nic_describe_stats()
3. Change efx_nic_type::update_stats to store the core statistics
   (struct rtnl_link_stats64) or full statistics (array of u64) in a
   caller-provided buffer.  Use efx_nic_update_stats() to aid in the
   implementation.
4. Rename struct efx_ethtool_stat to struct efx_sw_stat_desc and
   EFX_ETHTOOL_NUM_STATS to EFX_ETHTOOL_SW_STAT_COUNT.
5. Remove efx_nic::mac_stats and struct efx_mac_stats.
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>

drivers/net/ethernet/sfc/efx.c

@@ -1920,34 +1920,9 @@ static struct rtnl_link_stats64 *efx_net_stats(struct net_device *net_dev,
 					       struct rtnl_link_stats64 *stats)
 {
 	struct efx_nic *efx = netdev_priv(net_dev);
-	struct efx_mac_stats *mac_stats = &efx->mac_stats;
 
 	spin_lock_bh(&efx->stats_lock);
-
-	efx->type->update_stats(efx);
-
-	stats->rx_packets = mac_stats->rx_packets;
-	stats->tx_packets = mac_stats->tx_packets;
-	stats->rx_bytes = mac_stats->rx_bytes;
-	stats->tx_bytes = mac_stats->tx_bytes;
-	stats->rx_dropped = efx->n_rx_nodesc_drop_cnt;
-	stats->multicast = mac_stats->rx_multicast;
-	stats->collisions = mac_stats->tx_collision;
-	stats->rx_length_errors = (mac_stats->rx_gtjumbo +
-				   mac_stats->rx_length_error);
-	stats->rx_crc_errors = mac_stats->rx_bad;
-	stats->rx_frame_errors = mac_stats->rx_align_error;
-	stats->rx_fifo_errors = mac_stats->rx_overflow;
-	stats->rx_missed_errors = mac_stats->rx_missed;
-	stats->tx_window_errors = mac_stats->tx_late_collision;
-
-	stats->rx_errors = (stats->rx_length_errors +
-			    stats->rx_crc_errors +
-			    stats->rx_frame_errors +
-			    mac_stats->rx_symbol_error);
-	stats->tx_errors = (stats->tx_window_errors +
-			    mac_stats->tx_bad);
-
+	efx->type->update_stats(efx, NULL, stats);
 	spin_unlock_bh(&efx->stats_lock);
 
 	return stats;

drivers/net/ethernet/sfc/ethtool.c

@@ -19,10 +19,9 @@
 #include "filter.h"
 #include "nic.h"
 
-struct efx_ethtool_stat {
+struct efx_sw_stat_desc {
 	const char *name;
 	enum {
-		EFX_ETHTOOL_STAT_SOURCE_mac_stats,
 		EFX_ETHTOOL_STAT_SOURCE_nic,
 		EFX_ETHTOOL_STAT_SOURCE_channel,
 		EFX_ETHTOOL_STAT_SOURCE_tx_queue
@@ -31,7 +30,7 @@ struct efx_ethtool_stat {
 	u64(*get_stat) (void *field); /* Reader function */
 };
 
-/* Initialiser for a struct #efx_ethtool_stat with type-checking */
+/* Initialiser for a struct efx_sw_stat_desc with type-checking */
 #define EFX_ETHTOOL_STAT(stat_name, source_name, field, field_type, \
 				get_stat_function) {			\
 	.name = #stat_name,						\
@@ -48,24 +47,11 @@ static u64 efx_get_uint_stat(void *field)
 	return *(unsigned int *)field;
 }
 
-static u64 efx_get_u64_stat(void *field)
-{
-	return *(u64 *) field;
-}
-
 static u64 efx_get_atomic_stat(void *field)
 {
 	return atomic_read((atomic_t *) field);
 }
 
-#define EFX_ETHTOOL_U64_MAC_STAT(field)				\
-	EFX_ETHTOOL_STAT(field, mac_stats, field,		\
-			  u64, efx_get_u64_stat)
-
-#define EFX_ETHTOOL_UINT_NIC_STAT(name)				\
-	EFX_ETHTOOL_STAT(name, nic, n_##name,			\
-			 unsigned int, efx_get_uint_stat)
-
 #define EFX_ETHTOOL_ATOMIC_NIC_ERROR_STAT(field)		\
 	EFX_ETHTOOL_STAT(field, nic, field,			\
 			 atomic_t, efx_get_atomic_stat)
@@ -78,72 +64,11 @@ static u64 efx_get_atomic_stat(void *field)
 	EFX_ETHTOOL_STAT(tx_##field, tx_queue, field,		\
 			 unsigned int, efx_get_uint_stat)
 
-static const struct efx_ethtool_stat efx_ethtool_stats[] = {
-	EFX_ETHTOOL_U64_MAC_STAT(tx_bytes),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_good_bytes),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_bad_bytes),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_packets),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_bad),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_pause),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_control),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_unicast),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_multicast),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_broadcast),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_lt64),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_64),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_65_to_127),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_128_to_255),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_256_to_511),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_512_to_1023),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_1024_to_15xx),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_15xx_to_jumbo),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_gtjumbo),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_collision),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_single_collision),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_multiple_collision),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_excessive_collision),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_deferred),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_late_collision),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_excessive_deferred),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_non_tcpudp),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_mac_src_error),
-	EFX_ETHTOOL_U64_MAC_STAT(tx_ip_src_error),
+static const struct efx_sw_stat_desc efx_sw_stat_desc[] = {
 	EFX_ETHTOOL_UINT_TXQ_STAT(tso_bursts),
 	EFX_ETHTOOL_UINT_TXQ_STAT(tso_long_headers),
 	EFX_ETHTOOL_UINT_TXQ_STAT(tso_packets),
 	EFX_ETHTOOL_UINT_TXQ_STAT(pushes),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_bytes),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_good_bytes),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_bad_bytes),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_packets),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_good),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_bad),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_pause),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_control),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_unicast),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_multicast),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_broadcast),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_lt64),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_64),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_65_to_127),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_128_to_255),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_256_to_511),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_512_to_1023),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_1024_to_15xx),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_15xx_to_jumbo),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_gtjumbo),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_bad_lt64),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_bad_64_to_15xx),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_bad_15xx_to_jumbo),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_bad_gtjumbo),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_overflow),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_missed),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_false_carrier),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_symbol_error),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_align_error),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_length_error),
-	EFX_ETHTOOL_U64_MAC_STAT(rx_internal_error),
-	EFX_ETHTOOL_UINT_NIC_STAT(rx_nodesc_drop_cnt),
 	EFX_ETHTOOL_ATOMIC_NIC_ERROR_STAT(rx_reset),
 	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_tobe_disc),
 	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_ip_hdr_chksum_err),
@@ -153,8 +78,7 @@ static const struct efx_ethtool_stat efx_ethtool_stats[] = {
 	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_nodesc_trunc),
 };
 
-/* Number of ethtool statistics */
-#define EFX_ETHTOOL_NUM_STATS ARRAY_SIZE(efx_ethtool_stats)
+#define EFX_ETHTOOL_SW_STAT_COUNT ARRAY_SIZE(efx_sw_stat_desc)
 
 #define EFX_ETHTOOL_EEPROM_MAGIC 0xEFAB
 
@@ -424,12 +348,14 @@ static int efx_ethtool_fill_self_tests(struct efx_nic *efx,
 static int efx_ethtool_get_sset_count(struct net_device *net_dev,
 				      int string_set)
 {
+	struct efx_nic *efx = netdev_priv(net_dev);
+
 	switch (string_set) {
 	case ETH_SS_STATS:
-		return EFX_ETHTOOL_NUM_STATS;
+		return efx->type->describe_stats(efx, NULL) +
+			EFX_ETHTOOL_SW_STAT_COUNT;
 	case ETH_SS_TEST:
-		return efx_ethtool_fill_self_tests(netdev_priv(net_dev),
-						   NULL, NULL, NULL);
+		return efx_ethtool_fill_self_tests(efx, NULL, NULL, NULL);
 	default:
 		return -EINVAL;
 	}
@@ -443,9 +369,11 @@ static void efx_ethtool_get_strings(struct net_device *net_dev,
 
 	switch (string_set) {
 	case ETH_SS_STATS:
-		for (i = 0; i < EFX_ETHTOOL_NUM_STATS; i++)
+		strings += (efx->type->describe_stats(efx, strings) *
+			    ETH_GSTRING_LEN);
+		for (i = 0; i < EFX_ETHTOOL_SW_STAT_COUNT; i++)
 			strlcpy(strings + i * ETH_GSTRING_LEN,
-				efx_ethtool_stats[i].name, ETH_GSTRING_LEN);
+				efx_sw_stat_desc[i].name, ETH_GSTRING_LEN);
 		break;
 	case ETH_SS_TEST:
 		efx_ethtool_fill_self_tests(efx, NULL, strings, NULL);
@@ -461,27 +389,20 @@ static void efx_ethtool_get_stats(struct net_device *net_dev,
 				  u64 *data)
 {
 	struct efx_nic *efx = netdev_priv(net_dev);
-	struct efx_mac_stats *mac_stats = &efx->mac_stats;
-	const struct efx_ethtool_stat *stat;
+	const struct efx_sw_stat_desc *stat;
 	struct efx_channel *channel;
 	struct efx_tx_queue *tx_queue;
 	int i;
 
-	EFX_BUG_ON_PARANOID(stats->n_stats != EFX_ETHTOOL_NUM_STATS);
-
 	spin_lock_bh(&efx->stats_lock);
 
-	/* Update MAC and NIC statistics */
-	efx->type->update_stats(efx);
+	/* Get NIC statistics */
+	data += efx->type->update_stats(efx, data, NULL);
 
-	/* Fill detailed statistics buffer */
-	for (i = 0; i < EFX_ETHTOOL_NUM_STATS; i++) {
-		stat = &efx_ethtool_stats[i];
+	/* Get software statistics */
+	for (i = 0; i < EFX_ETHTOOL_SW_STAT_COUNT; i++) {
+		stat = &efx_sw_stat_desc[i];
 		switch (stat->source) {
-		case EFX_ETHTOOL_STAT_SOURCE_mac_stats:
-			data[i] = stat->get_stat((void *)mac_stats +
-						 stat->offset);
-			break;
 		case EFX_ETHTOOL_STAT_SOURCE_nic:
 			data[i] = stat->get_stat((void *)efx + stat->offset);
 			break;

drivers/net/ethernet/sfc/falcon.c

@@ -31,7 +31,7 @@
 
 /**************************************************************************
  *
- * MAC stats DMA format
+ * NIC stats
  *
  **************************************************************************
  */
@@ -134,27 +134,67 @@
 #define FALCON_XMAC_STATS_DMA_FLAG(efx)				\
 	(*(u32 *)((efx)->stats_buffer.addr + XgDmaDone_offset))
 
-#define FALCON_STAT_OFFSET(falcon_stat) EFX_VAL(falcon_stat, offset)
-#define FALCON_STAT_WIDTH(falcon_stat) EFX_VAL(falcon_stat, WIDTH)
-
-/* Retrieve statistic from statistics block */
-#define FALCON_STAT(efx, falcon_stat, efx_stat) do {		\
-	if (FALCON_STAT_WIDTH(falcon_stat) == 16)		\
-		(efx)->mac_stats.efx_stat += le16_to_cpu(	\
-			*((__force __le16 *)				\
-			  (efx->stats_buffer.addr +		\
-			   FALCON_STAT_OFFSET(falcon_stat))));	\
-	else if (FALCON_STAT_WIDTH(falcon_stat) == 32)		\
-		(efx)->mac_stats.efx_stat += le32_to_cpu(	\
-			*((__force __le32 *)				\
-			  (efx->stats_buffer.addr +		\
-			   FALCON_STAT_OFFSET(falcon_stat))));	\
-	else							\
-		(efx)->mac_stats.efx_stat += le64_to_cpu(	\
-			*((__force __le64 *)				\
-			  (efx->stats_buffer.addr +		\
-			   FALCON_STAT_OFFSET(falcon_stat))));	\
-	} while (0)
+#define FALCON_DMA_STAT(ext_name, hw_name)				\
+	[FALCON_STAT_ ## ext_name] =					\
+	{ #ext_name,							\
+	  /* 48-bit stats are zero-padded to 64 on DMA */		\
+	  hw_name ## _ ## WIDTH == 48 ? 64 : hw_name ## _ ## WIDTH,	\
+	  hw_name ## _ ## offset }
+#define FALCON_OTHER_STAT(ext_name)					\
+	[FALCON_STAT_ ## ext_name] = { #ext_name, 0, 0 }
+
+static const struct efx_hw_stat_desc falcon_stat_desc[FALCON_STAT_COUNT] = {
+	FALCON_DMA_STAT(tx_bytes, XgTxOctets),
+	FALCON_DMA_STAT(tx_packets, XgTxPkts),
+	FALCON_DMA_STAT(tx_pause, XgTxPausePkts),
+	FALCON_DMA_STAT(tx_control, XgTxControlPkts),
+	FALCON_DMA_STAT(tx_unicast, XgTxUnicastPkts),
+	FALCON_DMA_STAT(tx_multicast, XgTxMulticastPkts),
+	FALCON_DMA_STAT(tx_broadcast, XgTxBroadcastPkts),
+	FALCON_DMA_STAT(tx_lt64, XgTxUndersizePkts),
+	FALCON_DMA_STAT(tx_64, XgTxPkts64Octets),
+	FALCON_DMA_STAT(tx_65_to_127, XgTxPkts65to127Octets),
+	FALCON_DMA_STAT(tx_128_to_255, XgTxPkts128to255Octets),
+	FALCON_DMA_STAT(tx_256_to_511, XgTxPkts256to511Octets),
+	FALCON_DMA_STAT(tx_512_to_1023, XgTxPkts512to1023Octets),
+	FALCON_DMA_STAT(tx_1024_to_15xx, XgTxPkts1024to15xxOctets),
+	FALCON_DMA_STAT(tx_15xx_to_jumbo, XgTxPkts1519toMaxOctets),
+	FALCON_DMA_STAT(tx_gtjumbo, XgTxOversizePkts),
+	FALCON_DMA_STAT(tx_non_tcpudp, XgTxNonTcpUdpPkt),
+	FALCON_DMA_STAT(tx_mac_src_error, XgTxMacSrcErrPkt),
+	FALCON_DMA_STAT(tx_ip_src_error, XgTxIpSrcErrPkt),
+	FALCON_DMA_STAT(rx_bytes, XgRxOctets),
+	FALCON_DMA_STAT(rx_good_bytes, XgRxOctetsOK),
+	FALCON_OTHER_STAT(rx_bad_bytes),
+	FALCON_DMA_STAT(rx_packets, XgRxPkts),
+	FALCON_DMA_STAT(rx_good, XgRxPktsOK),
+	FALCON_DMA_STAT(rx_bad, XgRxFCSerrorPkts),
+	FALCON_DMA_STAT(rx_pause, XgRxPausePkts),
+	FALCON_DMA_STAT(rx_control, XgRxControlPkts),
+	FALCON_DMA_STAT(rx_unicast, XgRxUnicastPkts),
+	FALCON_DMA_STAT(rx_multicast, XgRxMulticastPkts),
+	FALCON_DMA_STAT(rx_broadcast, XgRxBroadcastPkts),
+	FALCON_DMA_STAT(rx_lt64, XgRxUndersizePkts),
+	FALCON_DMA_STAT(rx_64, XgRxPkts64Octets),
+	FALCON_DMA_STAT(rx_65_to_127, XgRxPkts65to127Octets),
+	FALCON_DMA_STAT(rx_128_to_255, XgRxPkts128to255Octets),
+	FALCON_DMA_STAT(rx_256_to_511, XgRxPkts256to511Octets),
+	FALCON_DMA_STAT(rx_512_to_1023, XgRxPkts512to1023Octets),
+	FALCON_DMA_STAT(rx_1024_to_15xx, XgRxPkts1024to15xxOctets),
+	FALCON_DMA_STAT(rx_15xx_to_jumbo, XgRxPkts15xxtoMaxOctets),
+	FALCON_DMA_STAT(rx_gtjumbo, XgRxOversizePkts),
+	FALCON_DMA_STAT(rx_bad_lt64, XgRxUndersizeFCSerrorPkts),
+	FALCON_DMA_STAT(rx_bad_gtjumbo, XgRxJabberPkts),
+	FALCON_DMA_STAT(rx_overflow, XgRxDropEvents),
+	FALCON_DMA_STAT(rx_symbol_error, XgRxSymbolError),
+	FALCON_DMA_STAT(rx_align_error, XgRxAlignError),
+	FALCON_DMA_STAT(rx_length_error, XgRxLengthError),
+	FALCON_DMA_STAT(rx_internal_error, XgRxInternalMACError),
+	FALCON_OTHER_STAT(rx_nodesc_drop_cnt),
+};
+static const unsigned long falcon_stat_mask[] = {
+	[0 ... BITS_TO_LONGS(FALCON_STAT_COUNT) - 1] = ~0UL,
+};
 
 /**************************************************************************
  *
@@ -1159,66 +1199,6 @@ static int falcon_reconfigure_xmac(struct efx_nic *efx)
 	return 0;
 }
 
-static void falcon_update_stats_xmac(struct efx_nic *efx)
-{
-	struct efx_mac_stats *mac_stats = &efx->mac_stats;
-
-	/* Update MAC stats from DMAed values */
-	FALCON_STAT(efx, XgRxOctets, rx_bytes);
-	FALCON_STAT(efx, XgRxOctetsOK, rx_good_bytes);
-	FALCON_STAT(efx, XgRxPkts, rx_packets);
-	FALCON_STAT(efx, XgRxPktsOK, rx_good);
-	FALCON_STAT(efx, XgRxBroadcastPkts, rx_broadcast);
-	FALCON_STAT(efx, XgRxMulticastPkts, rx_multicast);
-	FALCON_STAT(efx, XgRxUnicastPkts, rx_unicast);
-	FALCON_STAT(efx, XgRxUndersizePkts, rx_lt64);
-	FALCON_STAT(efx, XgRxOversizePkts, rx_gtjumbo);
-	FALCON_STAT(efx, XgRxJabberPkts, rx_bad_gtjumbo);
-	FALCON_STAT(efx, XgRxUndersizeFCSerrorPkts, rx_bad_lt64);
-	FALCON_STAT(efx, XgRxDropEvents, rx_overflow);
-	FALCON_STAT(efx, XgRxFCSerrorPkts, rx_bad);
-	FALCON_STAT(efx, XgRxAlignError, rx_align_error);
-	FALCON_STAT(efx, XgRxSymbolError, rx_symbol_error);
-	FALCON_STAT(efx, XgRxInternalMACError, rx_internal_error);
-	FALCON_STAT(efx, XgRxControlPkts, rx_control);
-	FALCON_STAT(efx, XgRxPausePkts, rx_pause);
-	FALCON_STAT(efx, XgRxPkts64Octets, rx_64);
-	FALCON_STAT(efx, XgRxPkts65to127Octets, rx_65_to_127);
-	FALCON_STAT(efx, XgRxPkts128to255Octets, rx_128_to_255);
-	FALCON_STAT(efx, XgRxPkts256to511Octets, rx_256_to_511);
-	FALCON_STAT(efx, XgRxPkts512to1023Octets, rx_512_to_1023);
-	FALCON_STAT(efx, XgRxPkts1024to15xxOctets, rx_1024_to_15xx);
-	FALCON_STAT(efx, XgRxPkts15xxtoMaxOctets, rx_15xx_to_jumbo);
-	FALCON_STAT(efx, XgRxLengthError, rx_length_error);
-	FALCON_STAT(efx, XgTxPkts, tx_packets);
-	FALCON_STAT(efx, XgTxOctets, tx_bytes);
-	FALCON_STAT(efx, XgTxMulticastPkts, tx_multicast);
-	FALCON_STAT(efx, XgTxBroadcastPkts, tx_broadcast);
-	FALCON_STAT(efx, XgTxUnicastPkts, tx_unicast);
-	FALCON_STAT(efx, XgTxControlPkts, tx_control);
-	FALCON_STAT(efx, XgTxPausePkts, tx_pause);
-	FALCON_STAT(efx, XgTxPkts64Octets, tx_64);
-	FALCON_STAT(efx, XgTxPkts65to127Octets, tx_65_to_127);
-	FALCON_STAT(efx, XgTxPkts128to255Octets, tx_128_to_255);
-	FALCON_STAT(efx, XgTxPkts256to511Octets, tx_256_to_511);
-	FALCON_STAT(efx, XgTxPkts512to1023Octets, tx_512_to_1023);
-	FALCON_STAT(efx, XgTxPkts1024to15xxOctets, tx_1024_to_15xx);
-	FALCON_STAT(efx, XgTxPkts1519toMaxOctets, tx_15xx_to_jumbo);
-	FALCON_STAT(efx, XgTxUndersizePkts, tx_lt64);
-	FALCON_STAT(efx, XgTxOversizePkts, tx_gtjumbo);
-	FALCON_STAT(efx, XgTxNonTcpUdpPkt, tx_non_tcpudp);
-	FALCON_STAT(efx, XgTxMacSrcErrPkt, tx_mac_src_error);
-	FALCON_STAT(efx, XgTxIpSrcErrPkt, tx_ip_src_error);
-
-	/* Update derived statistics */
-	efx_update_diff_stat(&mac_stats->tx_good_bytes,
-			     mac_stats->tx_bytes - mac_stats->tx_bad_bytes -
-			     mac_stats->tx_control * 64);
-	efx_update_diff_stat(&mac_stats->rx_bad_bytes,
-			     mac_stats->rx_bytes - mac_stats->rx_good_bytes -
-			     mac_stats->rx_control * 64);
-}
-
 static void falcon_poll_xmac(struct efx_nic *efx)
 {
 	struct falcon_nic_data *nic_data = efx->nic_data;
@@ -1422,7 +1402,9 @@ static void falcon_stats_complete(struct efx_nic *efx)
 	nic_data->stats_pending = false;
 	if (FALCON_XMAC_STATS_DMA_FLAG(efx)) {
 		rmb(); /* read the done flag before the stats */
-		falcon_update_stats_xmac(efx);
+		efx_nic_update_stats(falcon_stat_desc, FALCON_STAT_COUNT,
+				     falcon_stat_mask, nic_data->stats,
+				     efx->stats_buffer.addr, true);
 	} else {
 		netif_err(efx, hw, efx->net_dev,
 			  "timed out waiting for statistics\n");
@@ -2538,23 +2520,65 @@ static void falcon_remove_nic(struct efx_nic *efx)
 	efx->nic_data = NULL;
 }
 
-static void falcon_update_nic_stats(struct efx_nic *efx)
+static size_t falcon_describe_nic_stats(struct efx_nic *efx, u8 *names)
+{
+	return efx_nic_describe_stats(falcon_stat_desc, FALCON_STAT_COUNT,
+				      falcon_stat_mask, names);
+}
+
+static size_t falcon_update_nic_stats(struct efx_nic *efx, u64 *full_stats,
+				      struct rtnl_link_stats64 *core_stats)
 {
 	struct falcon_nic_data *nic_data = efx->nic_data;
+	u64 *stats = nic_data->stats;
 	efx_oword_t cnt;
 
-	if (nic_data->stats_disable_count)
-		return;
+	if (!nic_data->stats_disable_count) {
+		efx_reado(efx, &cnt, FR_AZ_RX_NODESC_DROP);
+		stats[FALCON_STAT_rx_nodesc_drop_cnt] +=
+			EFX_OWORD_FIELD(cnt, FRF_AB_RX_NODESC_DROP_CNT);
+
+		if (nic_data->stats_pending &&
+		    FALCON_XMAC_STATS_DMA_FLAG(efx)) {
+			nic_data->stats_pending = false;
+			rmb(); /* read the done flag before the stats */
+			efx_nic_update_stats(
+				falcon_stat_desc, FALCON_STAT_COUNT,
+				falcon_stat_mask,
+				stats, efx->stats_buffer.addr, true);
+		}
 
-	efx_reado(efx, &cnt, FR_AZ_RX_NODESC_DROP);
-	efx->n_rx_nodesc_drop_cnt +=
-		EFX_OWORD_FIELD(cnt, FRF_AB_RX_NODESC_DROP_CNT);
+		/* Update derived statistic */
+		efx_update_diff_stat(&stats[FALCON_STAT_rx_bad_bytes],
+				     stats[FALCON_STAT_rx_bytes] -
+				     stats[FALCON_STAT_rx_good_bytes] -
+				     stats[FALCON_STAT_rx_control] * 64);
+	}
 
-	if (nic_data->stats_pending && FALCON_XMAC_STATS_DMA_FLAG(efx)) {
-		nic_data->stats_pending = false;
-		rmb(); /* read the done flag before the stats */
-		falcon_update_stats_xmac(efx);
+	if (full_stats)
+		memcpy(full_stats, stats, sizeof(u64) * FALCON_STAT_COUNT);
+
+	if (core_stats) {
+		core_stats->rx_packets = stats[FALCON_STAT_rx_packets];
+		core_stats->tx_packets = stats[FALCON_STAT_tx_packets];
+		core_stats->rx_bytes = stats[FALCON_STAT_rx_bytes];
+		core_stats->tx_bytes = stats[FALCON_STAT_tx_bytes];
+		core_stats->rx_dropped = stats[FALCON_STAT_rx_nodesc_drop_cnt];
+		core_stats->multicast = stats[FALCON_STAT_rx_multicast];
+		core_stats->rx_length_errors =
+			stats[FALCON_STAT_rx_gtjumbo] +
+			stats[FALCON_STAT_rx_length_error];
+		core_stats->rx_crc_errors = stats[FALCON_STAT_rx_bad];
+		core_stats->rx_frame_errors = stats[FALCON_STAT_rx_align_error];
+		core_stats->rx_fifo_errors = stats[FALCON_STAT_rx_overflow];
+
+		core_stats->rx_errors = (core_stats->rx_length_errors +
+					 core_stats->rx_crc_errors +
+					 core_stats->rx_frame_errors +
+					 stats[FALCON_STAT_rx_symbol_error]);
 	}
+
+	return FALCON_STAT_COUNT;
 }
 
 void falcon_start_nic_stats(struct efx_nic *efx)
@@ -2643,6 +2667,7 @@ const struct efx_nic_type falcon_a1_nic_type = {
 	.fini_dmaq = efx_farch_fini_dmaq,
 	.prepare_flush = falcon_prepare_flush,
 	.finish_flush = efx_port_dummy_op_void,
+	.describe_stats = falcon_describe_nic_stats,
 	.update_stats = falcon_update_nic_stats,
 	.start_stats = falcon_start_nic_stats,
 	.stop_stats = falcon_stop_nic_stats,
@@ -2735,6 +2760,7 @@ const struct efx_nic_type falcon_b0_nic_type = {
 	.fini_dmaq = efx_farch_fini_dmaq,
 	.prepare_flush = falcon_prepare_flush,
 	.finish_flush = efx_port_dummy_op_void,
+	.describe_stats = falcon_describe_nic_stats,
 	.update_stats = falcon_update_nic_stats,
 	.start_stats = falcon_start_nic_stats,
 	.stop_stats = falcon_stop_nic_stats,

drivers/net/ethernet/sfc/mcdi.c

@@ -236,21 +236,10 @@ static int efx_mcdi_poll(struct efx_nic *efx)
  */
 int efx_mcdi_poll_reboot(struct efx_nic *efx)
 {
-	int rc;
-
 	if (!efx->mcdi)
 		return 0;
 
-	rc = efx->type->mcdi_poll_reboot(efx);
-	if (!rc)
-		return 0;
-
-	/* MAC statistics have been cleared on the NIC; clear our copy
-	 * so that efx_update_diff_stat() can continue to work.
-	 */
-	memset(&efx->mac_stats, 0, sizeof(efx->mac_stats));
-
-	return rc;
+	return efx->type->mcdi_poll_reboot(efx);
 }
 
 static void efx_mcdi_acquire(struct efx_mcdi_iface *mcdi)

drivers/net/ethernet/sfc/net_driver.h

@@ -595,75 +595,17 @@ static inline bool efx_phy_mode_disabled(enum efx_phy_mode mode)
 	return !!(mode & ~PHY_MODE_TX_DISABLED);
 }
 
-/*
- * Efx extended statistics
- *
- * Not all statistics are provided by all supported MACs.  The purpose
- * is this structure is to contain the raw statistics provided by each
- * MAC.
+/**
+ * struct efx_hw_stat_desc - Description of a hardware statistic
+ * @name: Name of the statistic as visible through ethtool, or %NULL if
+ *	it should not be exposed
+ * @dma_width: Width in bits (0 for non-DMA statistics)
+ * @offset: Offset within stats (ignored for non-DMA statistics)
  */
-struct efx_mac_stats {
-	u64 tx_bytes;
-	u64 tx_good_bytes;
-	u64 tx_bad_bytes;
-	u64 tx_packets;
-	u64 tx_bad;
-	u64 tx_pause;
-	u64 tx_control;
-	u64 tx_unicast;
-	u64 tx_multicast;
-	u64 tx_broadcast;
-	u64 tx_lt64;
-	u64 tx_64;
-	u64 tx_65_to_127;
-	u64 tx_128_to_255;
-	u64 tx_256_to_511;
-	u64 tx_512_to_1023;
-	u64 tx_1024_to_15xx;
-	u64 tx_15xx_to_jumbo;
-	u64 tx_gtjumbo;
-	u64 tx_collision;
-	u64 tx_single_collision;
-	u64 tx_multiple_collision;
-	u64 tx_excessive_collision;
-	u64 tx_deferred;
-	u64 tx_late_collision;
-	u64 tx_excessive_deferred;
-	u64 tx_non_tcpudp;
-	u64 tx_mac_src_error;
-	u64 tx_ip_src_error;
-	u64 rx_bytes;
-	u64 rx_good_bytes;
-	u64 rx_bad_bytes;
-	u64 rx_packets;
-	u64 rx_good;
-	u64 rx_bad;
-	u64 rx_pause;
-	u64 rx_control;
-	u64 rx_unicast;
-	u64 rx_multicast;
-	u64 rx_broadcast;
-	u64 rx_lt64;
-	u64 rx_64;
-	u64 rx_65_to_127;
-	u64 rx_128_to_255;
-	u64 rx_256_to_511;
-	u64 rx_512_to_1023;
-	u64 rx_1024_to_15xx;
-	u64 rx_15xx_to_jumbo;
-	u64 rx_gtjumbo;
-	u64 rx_bad_lt64;
-	u64 rx_bad_64_to_15xx;
-	u64 rx_bad_15xx_to_jumbo;
-	u64 rx_bad_gtjumbo;
-	u64 rx_overflow;
-	u64 rx_missed;
-	u64 rx_false_carrier;
-	u64 rx_symbol_error;
-	u64 rx_align_error;
-	u64 rx_length_error;
-	u64 rx_internal_error;
-	u64 rx_good_lt64;
+struct efx_hw_stat_desc {
+	const char *name;
+	u16 dma_width;
+	u16 offset;
 };
 
 /* Number of bits used in a multicast filter hash address */
@@ -795,12 +737,8 @@ struct vfdi_status;
  * @last_irq_cpu: Last CPU to handle a possible test interrupt.  This
  *	field is used by efx_test_interrupts() to verify that an
  *	interrupt has occurred.
- * @n_rx_nodesc_drop_cnt: RX no descriptor drop count
- * @mac_stats: MAC statistics. These include all statistics the MACs
- *	can provide.  Generic code converts these into a standard
- *	&struct net_device_stats.
- * @stats_lock: Statistics update lock. Serialises statistics fetches
- *	and access to @mac_stats.
+ * @stats_lock: Statistics update lock. Must be held when calling
+ *	efx_nic_type::{update,start,stop}_stats.
  *
  * This is stored in the private area of the &struct net_device.
  */
@@ -939,8 +877,6 @@ struct efx_nic {
 	struct delayed_work monitor_work ____cacheline_aligned_in_smp;
 	spinlock_t biu_lock;
 	int last_irq_cpu;
-	unsigned n_rx_nodesc_drop_cnt;
-	struct efx_mac_stats mac_stats;
 	spinlock_t stats_lock;
 };
 
@@ -984,7 +920,9 @@ struct efx_mtd_partition {
  *	(for Falcon architecture)
  * @finish_flush: Clean up after flushing the DMA queues (for Falcon
  *	architecture)
- * @update_stats: Update statistics not provided by event handling
+ * @describe_stats: Describe statistics for ethtool
+ * @update_stats: Update statistics not provided by event handling.
+ *	Either argument may be %NULL.
  * @start_stats: Start the regular fetching of statistics
  * @stop_stats: Stop the regular fetching of statistics
  * @set_id_led: Set state of identifying LED or revert to automatic function
@@ -1098,7 +1036,9 @@ struct efx_nic_type {
 	int (*fini_dmaq)(struct efx_nic *efx);
 	void (*prepare_flush)(struct efx_nic *efx);
 	void (*finish_flush)(struct efx_nic *efx);
-	void (*update_stats)(struct efx_nic *efx);
+	size_t (*describe_stats)(struct efx_nic *efx, u8 *names);
+	size_t (*update_stats)(struct efx_nic *efx, u64 *full_stats,
+			       struct rtnl_link_stats64 *core_stats);
 	void (*start_stats)(struct efx_nic *efx);
 	void (*stop_stats)(struct efx_nic *efx);
 	void (*set_id_led)(struct efx_nic *efx, enum efx_led_mode mode);

drivers/net/ethernet/sfc/nic.c

@@ -429,3 +429,86 @@ void efx_nic_get_regs(struct efx_nic *efx, void *buf)
 		}
 	}
 }
+
+/**
+ * efx_nic_describe_stats - Describe supported statistics for ethtool
+ * @desc: Array of &struct efx_hw_stat_desc describing the statistics
+ * @count: Length of the @desc array
+ * @mask: Bitmask of which elements of @desc are enabled
+ * @names: Buffer to copy names to, or %NULL.  The names are copied
+ *	starting at intervals of %ETH_GSTRING_LEN bytes.
+ *
+ * Returns the number of visible statistics, i.e. the number of set
+ * bits in the first @count bits of @mask for which a name is defined.
+ */
+size_t efx_nic_describe_stats(const struct efx_hw_stat_desc *desc, size_t count,
+			      const unsigned long *mask, u8 *names)
+{
+	size_t visible = 0;
+	size_t index;
+
+	for_each_set_bit(index, mask, count) {
+		if (desc[index].name) {
+			if (names) {
+				strlcpy(names, desc[index].name,
+					ETH_GSTRING_LEN);
+				names += ETH_GSTRING_LEN;
+			}
+			++visible;
+		}
+	}
+
+	return visible;
+}
+
+/**
+ * efx_nic_update_stats - Convert statistics DMA buffer to array of u64
+ * @desc: Array of &struct efx_hw_stat_desc describing the DMA buffer
+ *	layout.  DMA widths of 0, 16, 32 and 64 are supported; where
+ *	the width is specified as 0 the corresponding element of
+ *	@stats is not updated.
+ * @count: Length of the @desc array
+ * @mask: Bitmask of which elements of @desc are enabled
+ * @stats: Buffer to update with the converted statistics.  The length
+ *	of this array must be at least the number of set bits in the
+ *	first @count bits of @mask.
+ * @dma_buf: DMA buffer containing hardware statistics
+ * @accumulate: If set, the converted values will be added rather than
+ *	directly stored to the corresponding elements of @stats
+ */
+void efx_nic_update_stats(const struct efx_hw_stat_desc *desc, size_t count,
+			  const unsigned long *mask,
+			  u64 *stats, const void *dma_buf, bool accumulate)
+{
+	size_t index;
+
+	for_each_set_bit(index, mask, count) {
+		if (desc[index].dma_width) {
+			const void *addr = dma_buf + desc[index].offset;
+			u64 val;
+
+			switch (desc[index].dma_width) {
+			case 16:
+				val = le16_to_cpup((__le16 *)addr);
+				break;
+			case 32:
+				val = le32_to_cpup((__le32 *)addr);
+				break;
+			case 64:
+				val = le64_to_cpup((__le64 *)addr);
+				break;
+			default:
+				WARN_ON(1);
+				val = 0;
+				break;
+			}
+
+			if (accumulate)
+				*stats += val;
+			else
+				*stats = val;
+		}
+
+		++stats;
+	}
+}

drivers/net/ethernet/sfc/nic.h

@@ -191,10 +191,62 @@ static inline bool falcon_spi_present(const struct falcon_spi_device *spi)
 	return spi->size != 0;
 }
 
+enum {
+	FALCON_STAT_tx_bytes,
+	FALCON_STAT_tx_packets,
+	FALCON_STAT_tx_pause,
+	FALCON_STAT_tx_control,
+	FALCON_STAT_tx_unicast,
+	FALCON_STAT_tx_multicast,
+	FALCON_STAT_tx_broadcast,
+	FALCON_STAT_tx_lt64,
+	FALCON_STAT_tx_64,
+	FALCON_STAT_tx_65_to_127,
+	FALCON_STAT_tx_128_to_255,
+	FALCON_STAT_tx_256_to_511,
+	FALCON_STAT_tx_512_to_1023,
+	FALCON_STAT_tx_1024_to_15xx,
+	FALCON_STAT_tx_15xx_to_jumbo,
+	FALCON_STAT_tx_gtjumbo,
+	FALCON_STAT_tx_non_tcpudp,
+	FALCON_STAT_tx_mac_src_error,
+	FALCON_STAT_tx_ip_src_error,
+	FALCON_STAT_rx_bytes,
+	FALCON_STAT_rx_good_bytes,
+	FALCON_STAT_rx_bad_bytes,
+	FALCON_STAT_rx_packets,
+	FALCON_STAT_rx_good,
+	FALCON_STAT_rx_bad,
+	FALCON_STAT_rx_pause,
+	FALCON_STAT_rx_control,
+	FALCON_STAT_rx_unicast,
+	FALCON_STAT_rx_multicast,
+	FALCON_STAT_rx_broadcast,
+	FALCON_STAT_rx_lt64,
+	FALCON_STAT_rx_64,
+	FALCON_STAT_rx_65_to_127,
+	FALCON_STAT_rx_128_to_255,
+	FALCON_STAT_rx_256_to_511,
+	FALCON_STAT_rx_512_to_1023,
+	FALCON_STAT_rx_1024_to_15xx,
+	FALCON_STAT_rx_15xx_to_jumbo,
+	FALCON_STAT_rx_gtjumbo,
+	FALCON_STAT_rx_bad_lt64,
+	FALCON_STAT_rx_bad_gtjumbo,
+	FALCON_STAT_rx_overflow,
+	FALCON_STAT_rx_symbol_error,
+	FALCON_STAT_rx_align_error,
+	FALCON_STAT_rx_length_error,
+	FALCON_STAT_rx_internal_error,
+	FALCON_STAT_rx_nodesc_drop_cnt,
+	FALCON_STAT_COUNT
+};
+
 /**
  * struct falcon_nic_data - Falcon NIC state
  * @pci_dev2: Secondary function of Falcon A
  * @board: Board state and functions
+ * @stats: Hardware statistics
  * @stats_disable_count: Nest count for disabling statistics fetches
  * @stats_pending: Is there a pending DMA of MAC statistics.
  * @stats_timer: A timer for regularly fetching MAC statistics.
@@ -207,6 +259,7 @@ static inline bool falcon_spi_present(const struct falcon_spi_device *spi)
 struct falcon_nic_data {
 	struct pci_dev *pci_dev2;
 	struct falcon_board board;
+	u64 stats[FALCON_STAT_COUNT];
 	unsigned int stats_disable_count;
 	bool stats_pending;
 	struct timer_list stats_timer;
@@ -223,12 +276,75 @@ static inline struct falcon_board *falcon_board(struct efx_nic *efx)
 	return &data->board;
 }
 
+enum {
+	SIENA_STAT_tx_bytes,
+	SIENA_STAT_tx_good_bytes,
+	SIENA_STAT_tx_bad_bytes,
+	SIENA_STAT_tx_packets,
+	SIENA_STAT_tx_bad,
+	SIENA_STAT_tx_pause,
+	SIENA_STAT_tx_control,
+	SIENA_STAT_tx_unicast,
+	SIENA_STAT_tx_multicast,
+	SIENA_STAT_tx_broadcast,
+	SIENA_STAT_tx_lt64,
+	SIENA_STAT_tx_64,
+	SIENA_STAT_tx_65_to_127,
+	SIENA_STAT_tx_128_to_255,
+	SIENA_STAT_tx_256_to_511,
+	SIENA_STAT_tx_512_to_1023,
+	SIENA_STAT_tx_1024_to_15xx,
+	SIENA_STAT_tx_15xx_to_jumbo,
+	SIENA_STAT_tx_gtjumbo,
+	SIENA_STAT_tx_collision,
+	SIENA_STAT_tx_single_collision,
+	SIENA_STAT_tx_multiple_collision,
+	SIENA_STAT_tx_excessive_collision,
+	SIENA_STAT_tx_deferred,
+	SIENA_STAT_tx_late_collision,
+	SIENA_STAT_tx_excessive_deferred,
+	SIENA_STAT_tx_non_tcpudp,
+	SIENA_STAT_tx_mac_src_error,
+	SIENA_STAT_tx_ip_src_error,
+	SIENA_STAT_rx_bytes,
+	SIENA_STAT_rx_good_bytes,
+	SIENA_STAT_rx_bad_bytes,
+	SIENA_STAT_rx_packets,
+	SIENA_STAT_rx_good,
+	SIENA_STAT_rx_bad,
+	SIENA_STAT_rx_pause,
+	SIENA_STAT_rx_control,
+	SIENA_STAT_rx_unicast,
+	SIENA_STAT_rx_multicast,
+	SIENA_STAT_rx_broadcast,
+	SIENA_STAT_rx_lt64,
+	SIENA_STAT_rx_64,
+	SIENA_STAT_rx_65_to_127,
+	SIENA_STAT_rx_128_to_255,
+	SIENA_STAT_rx_256_to_511,
+	SIENA_STAT_rx_512_to_1023,
+	SIENA_STAT_rx_1024_to_15xx,
+	SIENA_STAT_rx_15xx_to_jumbo,
+	SIENA_STAT_rx_gtjumbo,
+	SIENA_STAT_rx_bad_gtjumbo,
+	SIENA_STAT_rx_overflow,
+	SIENA_STAT_rx_false_carrier,
+	SIENA_STAT_rx_symbol_error,
+	SIENA_STAT_rx_align_error,
+	SIENA_STAT_rx_length_error,
+	SIENA_STAT_rx_internal_error,
+	SIENA_STAT_rx_nodesc_drop_cnt,
+	SIENA_STAT_COUNT
+};
+
 /**
  * struct siena_nic_data - Siena NIC state
  * @wol_filter_id: Wake-on-LAN packet filter id
+ * @stats: Hardware statistics
  */
 struct siena_nic_data {
 	int wol_filter_id;
+	u64 stats[SIENA_STAT_COUNT];
 };
 
 /*
@@ -533,6 +649,14 @@ extern int efx_farch_test_registers(struct efx_nic *efx,
 extern size_t efx_nic_get_regs_len(struct efx_nic *efx);
 extern void efx_nic_get_regs(struct efx_nic *efx, void *buf);
 
+extern size_t
+efx_nic_describe_stats(const struct efx_hw_stat_desc *desc, size_t count,
+		       const unsigned long *mask, u8 *names);
+extern void
+efx_nic_update_stats(const struct efx_hw_stat_desc *desc, size_t count,
+		     const unsigned long *mask,
+		     u64 *stats, const void *dma_buf, bool accumulate);
+
 #define EFX_MAX_FLUSH_TIME 5000
 
 extern void efx_farch_generate_event(struct efx_nic *efx, unsigned int evq,

drivers/net/ethernet/sfc/siena.c

@@ -380,117 +380,160 @@ static void siena_remove_nic(struct efx_nic *efx)
 	efx_mcdi_fini(efx);
 }
 
+#define SIENA_DMA_STAT(ext_name, mcdi_name)			\
+	[SIENA_STAT_ ## ext_name] =				\
+	{ #ext_name, 64, 8 * MC_CMD_MAC_ ## mcdi_name }
+#define SIENA_OTHER_STAT(ext_name)				\
+	[SIENA_STAT_ ## ext_name] = { #ext_name, 0, 0 }
+
+static const struct efx_hw_stat_desc siena_stat_desc[SIENA_STAT_COUNT] = {
+	SIENA_DMA_STAT(tx_bytes, TX_BYTES),
+	SIENA_OTHER_STAT(tx_good_bytes),
+	SIENA_DMA_STAT(tx_bad_bytes, TX_BAD_BYTES),
+	SIENA_DMA_STAT(tx_packets, TX_PKTS),
+	SIENA_DMA_STAT(tx_bad, TX_BAD_FCS_PKTS),
+	SIENA_DMA_STAT(tx_pause, TX_PAUSE_PKTS),
+	SIENA_DMA_STAT(tx_control, TX_CONTROL_PKTS),
+	SIENA_DMA_STAT(tx_unicast, TX_UNICAST_PKTS),
+	SIENA_DMA_STAT(tx_multicast, TX_MULTICAST_PKTS),
+	SIENA_DMA_STAT(tx_broadcast, TX_BROADCAST_PKTS),
+	SIENA_DMA_STAT(tx_lt64, TX_LT64_PKTS),
+	SIENA_DMA_STAT(tx_64, TX_64_PKTS),
+	SIENA_DMA_STAT(tx_65_to_127, TX_65_TO_127_PKTS),
+	SIENA_DMA_STAT(tx_128_to_255, TX_128_TO_255_PKTS),
+	SIENA_DMA_STAT(tx_256_to_511, TX_256_TO_511_PKTS),
+	SIENA_DMA_STAT(tx_512_to_1023, TX_512_TO_1023_PKTS),
+	SIENA_DMA_STAT(tx_1024_to_15xx, TX_1024_TO_15XX_PKTS),
+	SIENA_DMA_STAT(tx_15xx_to_jumbo, TX_15XX_TO_JUMBO_PKTS),
+	SIENA_DMA_STAT(tx_gtjumbo, TX_GTJUMBO_PKTS),
+	SIENA_OTHER_STAT(tx_collision),
+	SIENA_DMA_STAT(tx_single_collision, TX_SINGLE_COLLISION_PKTS),
+	SIENA_DMA_STAT(tx_multiple_collision, TX_MULTIPLE_COLLISION_PKTS),
+	SIENA_DMA_STAT(tx_excessive_collision, TX_EXCESSIVE_COLLISION_PKTS),
+	SIENA_DMA_STAT(tx_deferred, TX_DEFERRED_PKTS),
+	SIENA_DMA_STAT(tx_late_collision, TX_LATE_COLLISION_PKTS),
+	SIENA_DMA_STAT(tx_excessive_deferred, TX_EXCESSIVE_DEFERRED_PKTS),
+	SIENA_DMA_STAT(tx_non_tcpudp, TX_NON_TCPUDP_PKTS),
+	SIENA_DMA_STAT(tx_mac_src_error, TX_MAC_SRC_ERR_PKTS),
+	SIENA_DMA_STAT(tx_ip_src_error, TX_IP_SRC_ERR_PKTS),
+	SIENA_DMA_STAT(rx_bytes, RX_BYTES),
+	SIENA_OTHER_STAT(rx_good_bytes),
+	SIENA_DMA_STAT(rx_bad_bytes, RX_BAD_BYTES),
+	SIENA_DMA_STAT(rx_packets, RX_PKTS),
+	SIENA_DMA_STAT(rx_good, RX_GOOD_PKTS),
+	SIENA_DMA_STAT(rx_bad, RX_BAD_FCS_PKTS),
+	SIENA_DMA_STAT(rx_pause, RX_PAUSE_PKTS),
+	SIENA_DMA_STAT(rx_control, RX_CONTROL_PKTS),
+	SIENA_DMA_STAT(rx_unicast, RX_UNICAST_PKTS),
+	SIENA_DMA_STAT(rx_multicast, RX_MULTICAST_PKTS),
+	SIENA_DMA_STAT(rx_broadcast, RX_BROADCAST_PKTS),
+	SIENA_DMA_STAT(rx_lt64, RX_UNDERSIZE_PKTS),
+	SIENA_DMA_STAT(rx_64, RX_64_PKTS),
+	SIENA_DMA_STAT(rx_65_to_127, RX_65_TO_127_PKTS),
+	SIENA_DMA_STAT(rx_128_to_255, RX_128_TO_255_PKTS),
+	SIENA_DMA_STAT(rx_256_to_511, RX_256_TO_511_PKTS),
+	SIENA_DMA_STAT(rx_512_to_1023, RX_512_TO_1023_PKTS),
+	SIENA_DMA_STAT(rx_1024_to_15xx, RX_1024_TO_15XX_PKTS),
+	SIENA_DMA_STAT(rx_15xx_to_jumbo, RX_15XX_TO_JUMBO_PKTS),
+	SIENA_DMA_STAT(rx_gtjumbo, RX_GTJUMBO_PKTS),
+	SIENA_DMA_STAT(rx_bad_gtjumbo, RX_JABBER_PKTS),
+	SIENA_DMA_STAT(rx_overflow, RX_OVERFLOW_PKTS),
+	SIENA_DMA_STAT(rx_false_carrier, RX_FALSE_CARRIER_PKTS),
+	SIENA_DMA_STAT(rx_symbol_error, RX_SYMBOL_ERROR_PKTS),
+	SIENA_DMA_STAT(rx_align_error, RX_ALIGN_ERROR_PKTS),
+	SIENA_DMA_STAT(rx_length_error, RX_LENGTH_ERROR_PKTS),
+	SIENA_DMA_STAT(rx_internal_error, RX_INTERNAL_ERROR_PKTS),
+	SIENA_DMA_STAT(rx_nodesc_drop_cnt, RX_NODESC_DROPS),
+};
+static const unsigned long siena_stat_mask[] = {
+	[0 ... BITS_TO_LONGS(SIENA_STAT_COUNT) - 1] = ~0UL,
+};
+
+static size_t siena_describe_nic_stats(struct efx_nic *efx, u8 *names)
+{
+	return efx_nic_describe_stats(siena_stat_desc, SIENA_STAT_COUNT,
+				      siena_stat_mask, names);
+}
+
 static int siena_try_update_nic_stats(struct efx_nic *efx)
 {
+	struct siena_nic_data *nic_data = efx->nic_data;
+	u64 *stats = nic_data->stats;
 	__le64 *dma_stats;
-	struct efx_mac_stats *mac_stats;
 	__le64 generation_start, generation_end;
 
-	mac_stats = &efx->mac_stats;
 	dma_stats = efx->stats_buffer.addr;
 
 	generation_end = dma_stats[MC_CMD_MAC_GENERATION_END];
 	if (generation_end == EFX_MC_STATS_GENERATION_INVALID)
 		return 0;
 	rmb();
-
-#define MAC_STAT(M, D) \
-	mac_stats->M = le64_to_cpu(dma_stats[MC_CMD_MAC_ ## D])
-
-	MAC_STAT(tx_bytes, TX_BYTES);
-	MAC_STAT(tx_bad_bytes, TX_BAD_BYTES);
-	efx_update_diff_stat(&mac_stats->tx_good_bytes,
-			     mac_stats->tx_bytes - mac_stats->tx_bad_bytes);
-	MAC_STAT(tx_packets, TX_PKTS);
-	MAC_STAT(tx_bad, TX_BAD_FCS_PKTS);
-	MAC_STAT(tx_pause, TX_PAUSE_PKTS);
-	MAC_STAT(tx_control, TX_CONTROL_PKTS);
-	MAC_STAT(tx_unicast, TX_UNICAST_PKTS);
-	MAC_STAT(tx_multicast, TX_MULTICAST_PKTS);
-	MAC_STAT(tx_broadcast, TX_BROADCAST_PKTS);
-	MAC_STAT(tx_lt64, TX_LT64_PKTS);
-	MAC_STAT(tx_64, TX_64_PKTS);
-	MAC_STAT(tx_65_to_127, TX_65_TO_127_PKTS);
-	MAC_STAT(tx_128_to_255, TX_128_TO_255_PKTS);
-	MAC_STAT(tx_256_to_511, TX_256_TO_511_PKTS);
-	MAC_STAT(tx_512_to_1023, TX_512_TO_1023_PKTS);
-	MAC_STAT(tx_1024_to_15xx, TX_1024_TO_15XX_PKTS);
-	MAC_STAT(tx_15xx_to_jumbo, TX_15XX_TO_JUMBO_PKTS);
-	MAC_STAT(tx_gtjumbo, TX_GTJUMBO_PKTS);
-	mac_stats->tx_collision = 0;
-	MAC_STAT(tx_single_collision, TX_SINGLE_COLLISION_PKTS);
-	MAC_STAT(tx_multiple_collision, TX_MULTIPLE_COLLISION_PKTS);
-	MAC_STAT(tx_excessive_collision, TX_EXCESSIVE_COLLISION_PKTS);
-	MAC_STAT(tx_deferred, TX_DEFERRED_PKTS);
-	MAC_STAT(tx_late_collision, TX_LATE_COLLISION_PKTS);
-	mac_stats->tx_collision = (mac_stats->tx_single_collision +
-				   mac_stats->tx_multiple_collision +
-				   mac_stats->tx_excessive_collision +
-				   mac_stats->tx_late_collision);
-	MAC_STAT(tx_excessive_deferred, TX_EXCESSIVE_DEFERRED_PKTS);
-	MAC_STAT(tx_non_tcpudp, TX_NON_TCPUDP_PKTS);
-	MAC_STAT(tx_mac_src_error, TX_MAC_SRC_ERR_PKTS);
-	MAC_STAT(tx_ip_src_error, TX_IP_SRC_ERR_PKTS);
-	MAC_STAT(rx_bytes, RX_BYTES);
-	MAC_STAT(rx_bad_bytes, RX_BAD_BYTES);
-	efx_update_diff_stat(&mac_stats->rx_good_bytes,
-			     mac_stats->rx_bytes - mac_stats->rx_bad_bytes);
-	MAC_STAT(rx_packets, RX_PKTS);
-	MAC_STAT(rx_good, RX_GOOD_PKTS);
-	MAC_STAT(rx_bad, RX_BAD_FCS_PKTS);
-	MAC_STAT(rx_pause, RX_PAUSE_PKTS);
-	MAC_STAT(rx_control, RX_CONTROL_PKTS);
-	MAC_STAT(rx_unicast, RX_UNICAST_PKTS);
-	MAC_STAT(rx_multicast, RX_MULTICAST_PKTS);
-	MAC_STAT(rx_broadcast, RX_BROADCAST_PKTS);
-	MAC_STAT(rx_lt64, RX_UNDERSIZE_PKTS);
-	MAC_STAT(rx_64, RX_64_PKTS);
-	MAC_STAT(rx_65_to_127, RX_65_TO_127_PKTS);
-	MAC_STAT(rx_128_to_255, RX_128_TO_255_PKTS);
-	MAC_STAT(rx_256_to_511, RX_256_TO_511_PKTS);
-	MAC_STAT(rx_512_to_1023, RX_512_TO_1023_PKTS);
-	MAC_STAT(rx_1024_to_15xx, RX_1024_TO_15XX_PKTS);
-	MAC_STAT(rx_15xx_to_jumbo, RX_15XX_TO_JUMBO_PKTS);
-	MAC_STAT(rx_gtjumbo, RX_GTJUMBO_PKTS);
-	mac_stats->rx_bad_lt64 = 0;
-	mac_stats->rx_bad_64_to_15xx = 0;
-	mac_stats->rx_bad_15xx_to_jumbo = 0;
-	MAC_STAT(rx_bad_gtjumbo, RX_JABBER_PKTS);
-	MAC_STAT(rx_overflow, RX_OVERFLOW_PKTS);
-	mac_stats->rx_missed = 0;
-	MAC_STAT(rx_false_carrier, RX_FALSE_CARRIER_PKTS);
-	MAC_STAT(rx_symbol_error, RX_SYMBOL_ERROR_PKTS);
-	MAC_STAT(rx_align_error, RX_ALIGN_ERROR_PKTS);
-	MAC_STAT(rx_length_error, RX_LENGTH_ERROR_PKTS);
-	MAC_STAT(rx_internal_error, RX_INTERNAL_ERROR_PKTS);
-	mac_stats->rx_good_lt64 = 0;
-
-	efx->n_rx_nodesc_drop_cnt =
-		le64_to_cpu(dma_stats[MC_CMD_MAC_RX_NODESC_DROPS]);
-
-#undef MAC_STAT
-
+	efx_nic_update_stats(siena_stat_desc, SIENA_STAT_COUNT, siena_stat_mask,
+			     stats, efx->stats_buffer.addr, false);
 	rmb();
 	generation_start = dma_stats[MC_CMD_MAC_GENERATION_START];
 	if (generation_end != generation_start)
 		return -EAGAIN;
 
+	/* Update derived statistics */
+	efx_update_diff_stat(&stats[SIENA_STAT_tx_good_bytes],
+			     stats[SIENA_STAT_tx_bytes] -
+			     stats[SIENA_STAT_tx_bad_bytes]);
+	stats[SIENA_STAT_tx_collision] =
+		stats[SIENA_STAT_tx_single_collision] +
+		stats[SIENA_STAT_tx_multiple_collision] +
+		stats[SIENA_STAT_tx_excessive_collision] +
+		stats[SIENA_STAT_tx_late_collision];
+	efx_update_diff_stat(&stats[SIENA_STAT_rx_good_bytes],
+			     stats[SIENA_STAT_rx_bytes] -
+			     stats[SIENA_STAT_rx_bad_bytes]);
 	return 0;
 }
 
-static void siena_update_nic_stats(struct efx_nic *efx)
+static size_t siena_update_nic_stats(struct efx_nic *efx, u64 *full_stats,
+				     struct rtnl_link_stats64 *core_stats)
 {
+	struct siena_nic_data *nic_data = efx->nic_data;
+	u64 *stats = nic_data->stats;
 	int retry;
 
 	/* If we're unlucky enough to read statistics wduring the DMA, wait
 	 * up to 10ms for it to finish (typically takes <500us) */
 	for (retry = 0; retry < 100; ++retry) {
 		if (siena_try_update_nic_stats(efx) == 0)
-			return;
+			break;
 		udelay(100);
 	}
 
-	/* Use the old values instead */
+	if (full_stats)
+		memcpy(full_stats, stats, sizeof(u64) * SIENA_STAT_COUNT);
+
+	if (core_stats) {
+		core_stats->rx_packets = stats[SIENA_STAT_rx_packets];
+		core_stats->tx_packets = stats[SIENA_STAT_tx_packets];
+		core_stats->rx_bytes = stats[SIENA_STAT_rx_bytes];
+		core_stats->tx_bytes = stats[SIENA_STAT_tx_bytes];
+		core_stats->rx_dropped = stats[SIENA_STAT_rx_nodesc_drop_cnt];
+		core_stats->multicast = stats[SIENA_STAT_rx_multicast];
+		core_stats->collisions = stats[SIENA_STAT_tx_collision];
+		core_stats->rx_length_errors =
+			stats[SIENA_STAT_rx_gtjumbo] +
+			stats[SIENA_STAT_rx_length_error];
+		core_stats->rx_crc_errors = stats[SIENA_STAT_rx_bad];
+		core_stats->rx_frame_errors = stats[SIENA_STAT_rx_align_error];
+		core_stats->rx_fifo_errors = stats[SIENA_STAT_rx_overflow];
+		core_stats->tx_window_errors =
+			stats[SIENA_STAT_tx_late_collision];
+
+		core_stats->rx_errors = (core_stats->rx_length_errors +
+					 core_stats->rx_crc_errors +
+					 core_stats->rx_frame_errors +
+					 stats[SIENA_STAT_rx_symbol_error]);
+		core_stats->tx_errors = (core_stats->tx_window_errors +
+					 stats[SIENA_STAT_tx_bad]);
+	}
+
+	return SIENA_STAT_COUNT;
 }
 
 static int siena_mac_reconfigure(struct efx_nic *efx)
@@ -652,6 +695,7 @@ static void siena_mcdi_read_response(struct efx_nic *efx, efx_dword_t *outbuf,
 
 static int siena_mcdi_poll_reboot(struct efx_nic *efx)
 {
+	struct siena_nic_data *nic_data = efx->nic_data;
 	unsigned int addr = FR_CZ_MC_TREG_SMEM + MCDI_STATUS(efx);
 	efx_dword_t reg;
 	u32 value;
@@ -665,6 +709,12 @@ static int siena_mcdi_poll_reboot(struct efx_nic *efx)
 	EFX_ZERO_DWORD(reg);
 	efx_writed(efx, &reg, addr);
 
+	/* MAC statistics have been cleared on the NIC; clear the local
+	 * copies that we update with efx_update_diff_stat().
+	 */
+	nic_data->stats[SIENA_STAT_tx_good_bytes] = 0;
+	nic_data->stats[SIENA_STAT_rx_good_bytes] = 0;
+
 	if (value == MC_STATUS_DWORD_ASSERT)
 		return -EINTR;
 	else
@@ -830,6 +880,7 @@ const struct efx_nic_type siena_a0_nic_type = {
 	.fini_dmaq = efx_farch_fini_dmaq,
 	.prepare_flush = siena_prepare_flush,
 	.finish_flush = siena_finish_flush,
+	.describe_stats = siena_describe_nic_stats,
 	.update_stats = siena_update_nic_stats,
 	.start_stats = efx_mcdi_mac_start_stats,
 	.stop_stats = efx_mcdi_mac_stop_stats,