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Message-ID: <20250723013031.2911384-3-skhawaja@google.com>
Date: Wed, 23 Jul 2025 01:30:30 +0000
From: Samiullah Khawaja <skhawaja@...gle.com>
To: Jakub Kicinski <kuba@...nel.org>, "David S . Miller " <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, almasrymina@...gle.com,
willemb@...gle.com
Cc: netdev@...r.kernel.org, skhawaja@...gle.com
Subject: [PATCH net-next v8 2/3] net: Use netif_threaded_enable instead of
netif_set_threaded in drivers
Prepare for adding an enum type for NAPI threaded states by adding
netif_threaded_enable API. De-export the existing netif_set_threaded API
and only use it internally. Update existing drivers to use
netif_threaded_enable instead of the de-exported netif_set_threaded.
Note that dev_set_threaded used by mt76 debugfs file is unchanged.
Signed-off-by: Samiullah Khawaja <skhawaja@...gle.com>
---
v8:
- Renamed netif_set_threaded_hint to netif_threaded_enable
- Added kdoc for netif_threaded_enable
- netif_threaded_enable return type is void
v7:
- Rebased and resolved conflicts.
---
.../net/ethernet/atheros/atl1c/atl1c_main.c | 2 +-
drivers/net/ethernet/mellanox/mlxsw/pci.c | 2 +-
drivers/net/ethernet/renesas/ravb_main.c | 2 +-
drivers/net/wireguard/device.c | 2 +-
drivers/net/wireless/ath/ath10k/snoc.c | 2 +-
include/linux/netdevice.h | 2 +-
net/core/dev.c | 18 +++++++++++++++++-
net/core/dev.h | 2 ++
8 files changed, 25 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
index 3a9ad4a9c1cb..7efa3fc257b3 100644
--- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
+++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
@@ -2688,7 +2688,7 @@ static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
adapter->mii.mdio_write = atl1c_mdio_write;
adapter->mii.phy_id_mask = 0x1f;
adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
- netif_set_threaded(netdev, true);
+ netif_threaded_enable(netdev);
for (i = 0; i < adapter->rx_queue_count; ++i)
netif_napi_add(netdev, &adapter->rrd_ring[i].napi,
atl1c_clean_rx);
diff --git a/drivers/net/ethernet/mellanox/mlxsw/pci.c b/drivers/net/ethernet/mellanox/mlxsw/pci.c
index a2e97b712a3d..8769cba2c746 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/pci.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/pci.c
@@ -156,7 +156,7 @@ static int mlxsw_pci_napi_devs_init(struct mlxsw_pci *mlxsw_pci)
}
strscpy(mlxsw_pci->napi_dev_rx->name, "mlxsw_rx",
sizeof(mlxsw_pci->napi_dev_rx->name));
- netif_set_threaded(mlxsw_pci->napi_dev_rx, true);
+ netif_threaded_enable(mlxsw_pci->napi_dev_rx);
return 0;
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 4e79bf88688a..94b6fb94f8f1 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -3075,7 +3075,7 @@ static int ravb_probe(struct platform_device *pdev)
if (info->coalesce_irqs) {
netdev_sw_irq_coalesce_default_on(ndev);
if (num_present_cpus() == 1)
- netif_set_threaded(ndev, true);
+ netif_threaded_enable(ndev);
}
/* Network device register */
diff --git a/drivers/net/wireguard/device.c b/drivers/net/wireguard/device.c
index 5afec5a865f4..813bd10d3dc7 100644
--- a/drivers/net/wireguard/device.c
+++ b/drivers/net/wireguard/device.c
@@ -366,7 +366,7 @@ static int wg_newlink(struct net_device *dev,
if (ret < 0)
goto err_free_handshake_queue;
- netif_set_threaded(dev, true);
+ netif_threaded_enable(dev);
ret = register_netdevice(dev);
if (ret < 0)
goto err_uninit_ratelimiter;
diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c
index 0ee68d3dad12..f0713bd36173 100644
--- a/drivers/net/wireless/ath/ath10k/snoc.c
+++ b/drivers/net/wireless/ath/ath10k/snoc.c
@@ -936,7 +936,7 @@ static int ath10k_snoc_hif_start(struct ath10k *ar)
bitmap_clear(ar_snoc->pending_ce_irqs, 0, CE_COUNT_MAX);
- netif_set_threaded(ar->napi_dev, true);
+ netif_threaded_enable(ar->napi_dev);
ath10k_core_napi_enable(ar);
/* IRQs are left enabled when we restart due to a firmware crash */
if (!test_bit(ATH10K_SNOC_FLAG_RECOVERY, &ar_snoc->flags))
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 5aee8d3895f4..a97c9a337d6b 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -589,7 +589,7 @@ static inline bool napi_complete(struct napi_struct *n)
return napi_complete_done(n, 0);
}
-int netif_set_threaded(struct net_device *dev, bool threaded);
+void netif_threaded_enable(struct net_device *dev);
int dev_set_threaded(struct net_device *dev, bool threaded);
void napi_disable(struct napi_struct *n);
diff --git a/net/core/dev.c b/net/core/dev.c
index 76384b8a7871..f28661d6f5ea 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -7029,7 +7029,23 @@ int netif_set_threaded(struct net_device *dev, bool threaded)
return err;
}
-EXPORT_SYMBOL(netif_set_threaded);
+
+/**
+ * netif_threaded_enable() - enable threaded NAPIs
+ * @dev: net_device instance
+ *
+ * Enable threaded mode for the NAPI instances of the device. This may be useful
+ * for devices where multiple NAPI instances get scheduled by a single
+ * interrupt. Threaded NAPI allows moving the NAPI processing to cores other
+ * than the core where IRQ is mapped.
+ *
+ * This function should be called before @dev is registered.
+ */
+void netif_threaded_enable(struct net_device *dev)
+{
+ WARN_ON_ONCE(netif_set_threaded(dev, true));
+}
+EXPORT_SYMBOL(netif_threaded_enable);
/**
* netif_queue_set_napi - Associate queue with the napi
diff --git a/net/core/dev.h b/net/core/dev.h
index a603387fb566..f5b567310908 100644
--- a/net/core/dev.h
+++ b/net/core/dev.h
@@ -322,6 +322,8 @@ static inline bool napi_get_threaded(struct napi_struct *n)
int napi_set_threaded(struct napi_struct *n, bool threaded);
+int netif_set_threaded(struct net_device *dev, bool threaded);
+
int rps_cpumask_housekeeping(struct cpumask *mask);
#if defined(CONFIG_DEBUG_NET) && defined(CONFIG_BPF_SYSCALL)
--
2.50.0.727.gbf7dc18ff4-goog
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