From: Lorenzo Bianconi <lorenzo@kernel.org>
To: Andrew Lunn <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>,
Paolo Abeni <pabeni@redhat.com>, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Lorenzo Bianconi <lorenzo@kernel.org>
Cc: Christian Marangi <ansuelsmth@gmail.com>,
Benjamin Larsson <benjamin.larsson@genexis.eu>,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, netdev@vger.kernel.org,
devicetree@vger.kernel.org
Subject: [PATCH net-next v5 12/12] net: airoha: Better handle MIB for GDM with multiple port attached
Date: Sat, 09 May 2026 15:05:37 +0200 [thread overview]
Message-ID: <20260509-airoha-eth-multi-serdes-v5-12-805e38edc2aa@kernel.org> (raw)
In-Reply-To: <20260509-airoha-eth-multi-serdes-v5-0-805e38edc2aa@kernel.org>
From: Christian Marangi <ansuelsmth@gmail.com>
In the context of a GDM that can have multiple port attached (GDM3/4)
the HW counter (MIB) are global for the GDM port. This cause duplicated
stats reported to the kernel for the related interface.
The SoC supports a split MIB feature where each counter is tracked based
on the relevant HW channel (NBQ) to account for this scenario and
provide a way to select the related counter on accessing the MIB
registers.
Enable this feature for GDM3 and GDM4 and configure the relevant HW
channel before updating the HW stats to report correct HW counter to the
kernel for the related interface.
Also move the stats struct from port to dev since HW counter are
now specific to the network interface instead of the GDM port.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
drivers/net/ethernet/airoha/airoha_eth.c | 169 ++++++++++++++++---------------
drivers/net/ethernet/airoha/airoha_eth.h | 4 +-
2 files changed, 91 insertions(+), 82 deletions(-)
diff --git a/drivers/net/ethernet/airoha/airoha_eth.c b/drivers/net/ethernet/airoha/airoha_eth.c
index 623cac42dfb7..b1a658629345 100644
--- a/drivers/net/ethernet/airoha/airoha_eth.c
+++ b/drivers/net/ethernet/airoha/airoha_eth.c
@@ -1621,143 +1621,150 @@ static void airoha_update_hw_stats(struct airoha_gdm_dev *dev)
struct airoha_eth *eth = dev->eth;
u32 val, i = 0;
- spin_lock(&port->stats.lock);
- u64_stats_update_begin(&port->stats.syncp);
+ spin_lock(&dev->stats.lock);
+ u64_stats_update_begin(&dev->stats.syncp);
+
+ /* Read relevant MIB for GDM with multiple port attached */
+ if (port->id == AIROHA_GDM3_IDX || port->id == AIROHA_GDM4_IDX)
+ airoha_fe_rmw(eth, REG_FE_GDM_MIB_CFG(port->id),
+ FE_TX_MIB_ID_MASK | FE_RX_MIB_ID_MASK,
+ FIELD_PREP(FE_TX_MIB_ID_MASK, dev->nbq) |
+ FIELD_PREP(FE_RX_MIB_ID_MASK, dev->nbq));
/* TX */
val = airoha_fe_rr(eth, REG_FE_GDM_TX_OK_PKT_CNT_H(port->id));
- port->stats.tx_ok_pkts += ((u64)val << 32);
+ dev->stats.tx_ok_pkts += ((u64)val << 32);
val = airoha_fe_rr(eth, REG_FE_GDM_TX_OK_PKT_CNT_L(port->id));
- port->stats.tx_ok_pkts += val;
+ dev->stats.tx_ok_pkts += val;
val = airoha_fe_rr(eth, REG_FE_GDM_TX_OK_BYTE_CNT_H(port->id));
- port->stats.tx_ok_bytes += ((u64)val << 32);
+ dev->stats.tx_ok_bytes += ((u64)val << 32);
val = airoha_fe_rr(eth, REG_FE_GDM_TX_OK_BYTE_CNT_L(port->id));
- port->stats.tx_ok_bytes += val;
+ dev->stats.tx_ok_bytes += val;
val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_DROP_CNT(port->id));
- port->stats.tx_drops += val;
+ dev->stats.tx_drops += val;
val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_BC_CNT(port->id));
- port->stats.tx_broadcast += val;
+ dev->stats.tx_broadcast += val;
val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_MC_CNT(port->id));
- port->stats.tx_multicast += val;
+ dev->stats.tx_multicast += val;
val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_RUNT_CNT(port->id));
- port->stats.tx_len[i] += val;
+ dev->stats.tx_len[i] += val;
val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_E64_CNT_H(port->id));
- port->stats.tx_len[i] += ((u64)val << 32);
+ dev->stats.tx_len[i] += ((u64)val << 32);
val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_E64_CNT_L(port->id));
- port->stats.tx_len[i++] += val;
+ dev->stats.tx_len[i++] += val;
val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L64_CNT_H(port->id));
- port->stats.tx_len[i] += ((u64)val << 32);
+ dev->stats.tx_len[i] += ((u64)val << 32);
val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L64_CNT_L(port->id));
- port->stats.tx_len[i++] += val;
+ dev->stats.tx_len[i++] += val;
val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L127_CNT_H(port->id));
- port->stats.tx_len[i] += ((u64)val << 32);
+ dev->stats.tx_len[i] += ((u64)val << 32);
val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L127_CNT_L(port->id));
- port->stats.tx_len[i++] += val;
+ dev->stats.tx_len[i++] += val;
val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L255_CNT_H(port->id));
- port->stats.tx_len[i] += ((u64)val << 32);
+ dev->stats.tx_len[i] += ((u64)val << 32);
val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L255_CNT_L(port->id));
- port->stats.tx_len[i++] += val;
+ dev->stats.tx_len[i++] += val;
val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L511_CNT_H(port->id));
- port->stats.tx_len[i] += ((u64)val << 32);
+ dev->stats.tx_len[i] += ((u64)val << 32);
val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L511_CNT_L(port->id));
- port->stats.tx_len[i++] += val;
+ dev->stats.tx_len[i++] += val;
val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L1023_CNT_H(port->id));
- port->stats.tx_len[i] += ((u64)val << 32);
+ dev->stats.tx_len[i] += ((u64)val << 32);
val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L1023_CNT_L(port->id));
- port->stats.tx_len[i++] += val;
+ dev->stats.tx_len[i++] += val;
val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_LONG_CNT(port->id));
- port->stats.tx_len[i++] += val;
+ dev->stats.tx_len[i++] += val;
/* RX */
val = airoha_fe_rr(eth, REG_FE_GDM_RX_OK_PKT_CNT_H(port->id));
- port->stats.rx_ok_pkts += ((u64)val << 32);
+ dev->stats.rx_ok_pkts += ((u64)val << 32);
val = airoha_fe_rr(eth, REG_FE_GDM_RX_OK_PKT_CNT_L(port->id));
- port->stats.rx_ok_pkts += val;
+ dev->stats.rx_ok_pkts += val;
val = airoha_fe_rr(eth, REG_FE_GDM_RX_OK_BYTE_CNT_H(port->id));
- port->stats.rx_ok_bytes += ((u64)val << 32);
+ dev->stats.rx_ok_bytes += ((u64)val << 32);
val = airoha_fe_rr(eth, REG_FE_GDM_RX_OK_BYTE_CNT_L(port->id));
- port->stats.rx_ok_bytes += val;
+ dev->stats.rx_ok_bytes += val;
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_DROP_CNT(port->id));
- port->stats.rx_drops += val;
+ dev->stats.rx_drops += val;
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_BC_CNT(port->id));
- port->stats.rx_broadcast += val;
+ dev->stats.rx_broadcast += val;
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_MC_CNT(port->id));
- port->stats.rx_multicast += val;
+ dev->stats.rx_multicast += val;
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ERROR_DROP_CNT(port->id));
- port->stats.rx_errors += val;
+ dev->stats.rx_errors += val;
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_CRC_ERR_CNT(port->id));
- port->stats.rx_crc_error += val;
+ dev->stats.rx_crc_error += val;
val = airoha_fe_rr(eth, REG_FE_GDM_RX_OVERFLOW_DROP_CNT(port->id));
- port->stats.rx_over_errors += val;
+ dev->stats.rx_over_errors += val;
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_FRAG_CNT(port->id));
- port->stats.rx_fragment += val;
+ dev->stats.rx_fragment += val;
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_JABBER_CNT(port->id));
- port->stats.rx_jabber += val;
+ dev->stats.rx_jabber += val;
i = 0;
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_RUNT_CNT(port->id));
- port->stats.rx_len[i] += val;
+ dev->stats.rx_len[i] += val;
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_E64_CNT_H(port->id));
- port->stats.rx_len[i] += ((u64)val << 32);
+ dev->stats.rx_len[i] += ((u64)val << 32);
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_E64_CNT_L(port->id));
- port->stats.rx_len[i++] += val;
+ dev->stats.rx_len[i++] += val;
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L64_CNT_H(port->id));
- port->stats.rx_len[i] += ((u64)val << 32);
+ dev->stats.rx_len[i] += ((u64)val << 32);
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L64_CNT_L(port->id));
- port->stats.rx_len[i++] += val;
+ dev->stats.rx_len[i++] += val;
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L127_CNT_H(port->id));
- port->stats.rx_len[i] += ((u64)val << 32);
+ dev->stats.rx_len[i] += ((u64)val << 32);
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L127_CNT_L(port->id));
- port->stats.rx_len[i++] += val;
+ dev->stats.rx_len[i++] += val;
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L255_CNT_H(port->id));
- port->stats.rx_len[i] += ((u64)val << 32);
+ dev->stats.rx_len[i] += ((u64)val << 32);
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L255_CNT_L(port->id));
- port->stats.rx_len[i++] += val;
+ dev->stats.rx_len[i++] += val;
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L511_CNT_H(port->id));
- port->stats.rx_len[i] += ((u64)val << 32);
+ dev->stats.rx_len[i] += ((u64)val << 32);
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L511_CNT_L(port->id));
- port->stats.rx_len[i++] += val;
+ dev->stats.rx_len[i++] += val;
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L1023_CNT_H(port->id));
- port->stats.rx_len[i] += ((u64)val << 32);
+ dev->stats.rx_len[i] += ((u64)val << 32);
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L1023_CNT_L(port->id));
- port->stats.rx_len[i++] += val;
+ dev->stats.rx_len[i++] += val;
val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_LONG_CNT(port->id));
- port->stats.rx_len[i++] += val;
+ dev->stats.rx_len[i++] += val;
/* reset mib counters */
airoha_fe_set(eth, REG_FE_GDM_MIB_CLEAR(port->id),
FE_GDM_MIB_RX_CLEAR_MASK | FE_GDM_MIB_TX_CLEAR_MASK);
- u64_stats_update_end(&port->stats.syncp);
- spin_unlock(&port->stats.lock);
+ u64_stats_update_end(&dev->stats.syncp);
+ spin_unlock(&dev->stats.lock);
}
static int airoha_dev_open(struct net_device *netdev)
@@ -1970,6 +1977,11 @@ static int airoha_dev_init(struct net_device *netdev)
case AIROHA_GDM4_IDX: {
struct airoha_eth *eth = dev->eth;
+ /* Enable split MIB for GDM with multiple port attached */
+ airoha_fe_set(eth, REG_FE_GDM_MIB_CFG(port->id),
+ FE_GDM_TX_MIB_SPLIT_EN_MASK |
+ FE_GDM_RX_MIB_SPLIT_EN_MASK);
+
/* GDM2 supports a single net_device */
if (eth->ports[1] && eth->ports[1]->devs[0])
break;
@@ -2008,23 +2020,22 @@ static void airoha_dev_get_stats64(struct net_device *netdev,
struct rtnl_link_stats64 *storage)
{
struct airoha_gdm_dev *dev = netdev_priv(netdev);
- struct airoha_gdm_port *port = dev->port;
unsigned int start;
airoha_update_hw_stats(dev);
do {
- start = u64_stats_fetch_begin(&port->stats.syncp);
- storage->rx_packets = port->stats.rx_ok_pkts;
- storage->tx_packets = port->stats.tx_ok_pkts;
- storage->rx_bytes = port->stats.rx_ok_bytes;
- storage->tx_bytes = port->stats.tx_ok_bytes;
- storage->multicast = port->stats.rx_multicast;
- storage->rx_errors = port->stats.rx_errors;
- storage->rx_dropped = port->stats.rx_drops;
- storage->tx_dropped = port->stats.tx_drops;
- storage->rx_crc_errors = port->stats.rx_crc_error;
- storage->rx_over_errors = port->stats.rx_over_errors;
- } while (u64_stats_fetch_retry(&port->stats.syncp, start));
+ start = u64_stats_fetch_begin(&dev->stats.syncp);
+ storage->rx_packets = dev->stats.rx_ok_pkts;
+ storage->tx_packets = dev->stats.tx_ok_pkts;
+ storage->rx_bytes = dev->stats.rx_ok_bytes;
+ storage->tx_bytes = dev->stats.tx_ok_bytes;
+ storage->multicast = dev->stats.rx_multicast;
+ storage->rx_errors = dev->stats.rx_errors;
+ storage->rx_dropped = dev->stats.rx_drops;
+ storage->tx_dropped = dev->stats.tx_drops;
+ storage->rx_crc_errors = dev->stats.rx_crc_error;
+ storage->rx_over_errors = dev->stats.rx_over_errors;
+ } while (u64_stats_fetch_retry(&dev->stats.syncp, start));
}
static int airoha_dev_change_mtu(struct net_device *netdev, int mtu)
@@ -2283,20 +2294,19 @@ static void airoha_ethtool_get_mac_stats(struct net_device *netdev,
struct ethtool_eth_mac_stats *stats)
{
struct airoha_gdm_dev *dev = netdev_priv(netdev);
- struct airoha_gdm_port *port = dev->port;
unsigned int start;
airoha_update_hw_stats(dev);
do {
- start = u64_stats_fetch_begin(&port->stats.syncp);
- stats->FramesTransmittedOK = port->stats.tx_ok_pkts;
- stats->OctetsTransmittedOK = port->stats.tx_ok_bytes;
- stats->MulticastFramesXmittedOK = port->stats.tx_multicast;
- stats->BroadcastFramesXmittedOK = port->stats.tx_broadcast;
- stats->FramesReceivedOK = port->stats.rx_ok_pkts;
- stats->OctetsReceivedOK = port->stats.rx_ok_bytes;
- stats->BroadcastFramesReceivedOK = port->stats.rx_broadcast;
- } while (u64_stats_fetch_retry(&port->stats.syncp, start));
+ start = u64_stats_fetch_begin(&dev->stats.syncp);
+ stats->FramesTransmittedOK = dev->stats.tx_ok_pkts;
+ stats->OctetsTransmittedOK = dev->stats.tx_ok_bytes;
+ stats->MulticastFramesXmittedOK = dev->stats.tx_multicast;
+ stats->BroadcastFramesXmittedOK = dev->stats.tx_broadcast;
+ stats->FramesReceivedOK = dev->stats.rx_ok_pkts;
+ stats->OctetsReceivedOK = dev->stats.rx_ok_bytes;
+ stats->BroadcastFramesReceivedOK = dev->stats.rx_broadcast;
+ } while (u64_stats_fetch_retry(&dev->stats.syncp, start));
}
static const struct ethtool_rmon_hist_range airoha_ethtool_rmon_ranges[] = {
@@ -2316,8 +2326,7 @@ airoha_ethtool_get_rmon_stats(struct net_device *netdev,
const struct ethtool_rmon_hist_range **ranges)
{
struct airoha_gdm_dev *dev = netdev_priv(netdev);
- struct airoha_gdm_port *port = dev->port;
- struct airoha_hw_stats *hw_stats = &port->stats;
+ struct airoha_hw_stats *hw_stats = &dev->stats;
unsigned int start;
BUILD_BUG_ON(ARRAY_SIZE(airoha_ethtool_rmon_ranges) !=
@@ -2330,7 +2339,7 @@ airoha_ethtool_get_rmon_stats(struct net_device *netdev,
do {
int i;
- start = u64_stats_fetch_begin(&port->stats.syncp);
+ start = u64_stats_fetch_begin(&dev->stats.syncp);
stats->fragments = hw_stats->rx_fragment;
stats->jabbers = hw_stats->rx_jabber;
for (i = 0; i < ARRAY_SIZE(airoha_ethtool_rmon_ranges) - 1;
@@ -2338,7 +2347,7 @@ airoha_ethtool_get_rmon_stats(struct net_device *netdev,
stats->hist[i] = hw_stats->rx_len[i];
stats->hist_tx[i] = hw_stats->tx_len[i];
}
- } while (u64_stats_fetch_retry(&port->stats.syncp, start));
+ } while (u64_stats_fetch_retry(&dev->stats.syncp, start));
}
static int airoha_qdma_set_chan_tx_sched(struct net_device *netdev,
@@ -3185,6 +3194,8 @@ static int airoha_alloc_gdm_device(struct airoha_eth *eth,
netdev->dev.of_node = of_node_get(np);
dev = netdev_priv(netdev);
+ u64_stats_init(&dev->stats.syncp);
+ spin_lock_init(&dev->stats.lock);
dev->dev = netdev;
dev->port = port;
dev->eth = eth;
@@ -3225,8 +3236,6 @@ static int airoha_alloc_gdm_port(struct airoha_eth *eth,
if (!port)
return -ENOMEM;
- u64_stats_init(&port->stats.syncp);
- spin_lock_init(&port->stats.lock);
port->id = id;
eth->ports[p] = port;
diff --git a/drivers/net/ethernet/airoha/airoha_eth.h b/drivers/net/ethernet/airoha/airoha_eth.h
index 4564a581d138..921d8aa01ac0 100644
--- a/drivers/net/ethernet/airoha/airoha_eth.h
+++ b/drivers/net/ethernet/airoha/airoha_eth.h
@@ -554,6 +554,8 @@ struct airoha_gdm_dev {
u32 flags;
int nbq;
+
+ struct airoha_hw_stats stats;
};
struct airoha_gdm_port {
@@ -561,8 +563,6 @@ struct airoha_gdm_port {
int id;
int users;
- struct airoha_hw_stats stats;
-
struct metadata_dst *dsa_meta[AIROHA_MAX_DSA_PORTS];
};
--
2.54.0
next prev parent reply other threads:[~2026-05-09 13:06 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-09 13:05 [PATCH net-next v5 00/12] net: airoha: Support multiple net_devices connected to the same GDM port Lorenzo Bianconi
2026-05-09 13:05 ` [PATCH net-next v5 01/12] dt-bindings: net: airoha: Add EN7581 ethernet-ports properties Lorenzo Bianconi
2026-05-10 14:05 ` sashiko-bot
2026-05-09 13:05 ` [PATCH net-next v5 02/12] net: airoha: Reserve RX headroom to avoid skb reallocation Lorenzo Bianconi
2026-05-10 14:05 ` sashiko-bot
2026-05-09 13:05 ` [PATCH net-next v5 03/12] net: airoha: Introduce airoha_gdm_dev struct Lorenzo Bianconi
2026-05-09 13:05 ` [PATCH net-next v5 04/12] net: airoha: Move airoha_qdma pointer in " Lorenzo Bianconi
2026-05-09 13:05 ` [PATCH net-next v5 05/12] net: airoha: Rely on airoha_gdm_dev pointer in airhoa_is_lan_gdm_port() Lorenzo Bianconi
2026-05-09 13:05 ` [PATCH net-next v5 06/12] net: airoha: Move qos_sq_bmap in airoha_gdm_dev struct Lorenzo Bianconi
2026-05-10 14:05 ` sashiko-bot
2026-05-09 13:05 ` [PATCH net-next v5 07/12] net: airoha: Move {cpu,fwd}_tx_packets " Lorenzo Bianconi
2026-05-09 13:05 ` [PATCH net-next v5 08/12] net: airoha: Support multiple net_devices for a single FE GDM port Lorenzo Bianconi
2026-05-10 14:05 ` sashiko-bot
2026-05-09 13:05 ` [PATCH net-next v5 09/12] net: airoha: Do not stop GDM port if it is shared Lorenzo Bianconi
2026-05-10 14:05 ` sashiko-bot
2026-05-09 13:05 ` [PATCH net-next v5 10/12] net: airoha: Introduce WAN device flag Lorenzo Bianconi
2026-05-09 13:05 ` [PATCH net-next v5 11/12] net: airoha: Support multiple LAN/WAN interfaces for hw MAC address configuration Lorenzo Bianconi
2026-05-10 14:05 ` sashiko-bot
2026-05-09 13:05 ` Lorenzo Bianconi [this message]
2026-05-10 14:05 ` [PATCH net-next v5 12/12] net: airoha: Better handle MIB for GDM with multiple port attached sashiko-bot
2026-05-11 6:51 ` Lorenzo Bianconi
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for how to clone and mirror all data and code used for this inbox