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Date: Fri, 26 Apr 2024 00:59:47 +0800
From: Heng Qi <hengqi@...ux.alibaba.com>
To: netdev@...r.kernel.org,
virtualization@...ts.linux.dev,
Jakub Kicinski <kuba@...nel.org>
Cc: "David S . Miller" <davem@...emloft.net>,
Paolo Abeni <pabeni@...hat.com>,
Eric Dumazet <edumazet@...gle.com>,
Jason Wang <jasowang@...hat.com>,
"Michael S . Tsirkin" <mst@...hat.com>,
Brett Creeley <bcreeley@....com>,
Ratheesh Kannoth <rkannoth@...vell.com>,
Alexander Lobakin <aleksander.lobakin@...el.com>,
Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
Tal Gilboa <talgi@...dia.com>,
Jonathan Corbet <corbet@....net>,
linux-doc@...r.kernel.org,
Maxime Chevallier <maxime.chevallier@...tlin.com>,
Jiri Pirko <jiri@...nulli.us>,
Paul Greenwalt <paul.greenwalt@...el.com>,
Ahmed Zaki <ahmed.zaki@...el.com>,
Vladimir Oltean <vladimir.oltean@....com>,
Kory Maincent <kory.maincent@...tlin.com>,
Andrew Lunn <andrew@...n.ch>,
"justinstitt @ google . com" <justinstitt@...gle.com>
Subject: [PATCH net-next v10 3/4] dim: add new interfaces for initialization and getting results
DIM-related mode and work have been collected in one same place,
so new interfaces are added to provide convenience.
Signed-off-by: Heng Qi <hengqi@...ux.alibaba.com>
---
include/linux/dim.h | 48 +++++++++++++++++++++++++++++++++
lib/dim/net_dim.c | 66 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 114 insertions(+)
diff --git a/include/linux/dim.h b/include/linux/dim.h
index af01389fcf39..ea7551bbc599 100644
--- a/include/linux/dim.h
+++ b/include/linux/dim.h
@@ -258,6 +258,54 @@ int net_dim_init_irq_moder(struct net_device *dev, u8 profile_flags,
*/
void net_dim_free_irq_moder(struct net_device *dev);
+/**
+ * net_dim_setting - initialize DIM's cq mode and schedule worker
+ * @dev: target network device
+ * @dim: DIM context
+ * @is_tx: true indicates the tx direction, false indicates the rx direction
+ */
+void net_dim_setting(struct net_device *dev, struct dim *dim, bool is_tx);
+
+/**
+ * net_dim_work_cancel - synchronously cancel dim's worker
+ * @dim: DIM context
+ */
+void net_dim_work_cancel(struct dim *dim);
+
+/**
+ * net_dim_get_rx_irq_moder - get DIM rx results based on profile_ix
+ * @dev: target network device
+ * @dim: DIM context
+ *
+ * Return: DIM irq moderation
+ */
+struct dim_cq_moder
+net_dim_get_rx_irq_moder(struct net_device *dev, struct dim *dim);
+
+/**
+ * net_dim_get_tx_irq_moder - get DIM tx results based on profile_ix
+ * @dev: target network device
+ * @dim: DIM context
+ *
+ * Return: DIM irq moderation
+ */
+struct dim_cq_moder
+net_dim_get_tx_irq_moder(struct net_device *dev, struct dim *dim);
+
+/**
+ * net_dim_set_rx_mode - set DIM rx cq mode
+ * @dev: target network device
+ * @rx_mode: target rx cq mode
+ */
+void net_dim_set_rx_mode(struct net_device *dev, u8 rx_mode);
+
+/**
+ * net_dim_set_tx_mode - set DIM tx cq mode
+ * @dev: target network device
+ * @tx_mode: target tx cq mode
+ */
+void net_dim_set_tx_mode(struct net_device *dev, u8 tx_mode);
+
/**
* dim_on_top - check if current state is a good place to stop (top location)
* @dim: DIM context
diff --git a/lib/dim/net_dim.c b/lib/dim/net_dim.c
index ec0dc21793c0..8c4543a628e1 100644
--- a/lib/dim/net_dim.c
+++ b/lib/dim/net_dim.c
@@ -174,6 +174,72 @@ void net_dim_free_irq_moder(struct net_device *dev)
}
EXPORT_SYMBOL(net_dim_free_irq_moder);
+void net_dim_setting(struct net_device *dev, struct dim *dim, bool is_tx)
+{
+ struct dim_irq_moder *irq_moder = dev->irq_moder;
+
+ if (!irq_moder)
+ return;
+
+ if (is_tx) {
+ INIT_WORK(&dim->work, irq_moder->tx_dim_work);
+ dim->mode = irq_moder->dim_tx_mode;
+ return;
+ }
+
+ INIT_WORK(&dim->work, irq_moder->rx_dim_work);
+ dim->mode = irq_moder->dim_rx_mode;
+}
+EXPORT_SYMBOL(net_dim_setting);
+
+void net_dim_work_cancel(struct dim *dim)
+{
+ cancel_work_sync(&dim->work);
+}
+EXPORT_SYMBOL(net_dim_work_cancel);
+
+struct dim_cq_moder net_dim_get_rx_irq_moder(struct net_device *dev,
+ struct dim *dim)
+{
+ struct dim_cq_moder res, *profile;
+
+ rcu_read_lock();
+ profile = rcu_dereference(dev->irq_moder->rx_profile);
+ res = profile[dim->profile_ix];
+ rcu_read_unlock();
+
+ dim->mode = READ_ONCE(dev->irq_moder->dim_rx_mode);
+
+ return res;
+}
+EXPORT_SYMBOL(net_dim_get_rx_irq_moder);
+
+struct dim_cq_moder net_dim_get_tx_irq_moder(struct net_device *dev,
+ struct dim *dim)
+{
+ struct dim_cq_moder res, *profile;
+
+ rcu_read_lock();
+ profile = rcu_dereference(dev->irq_moder->tx_profile);
+ res = profile[dim->profile_ix];
+ rcu_read_unlock();
+
+ dim->mode = READ_ONCE(dev->irq_moder->dim_tx_mode);
+
+ return res;
+}
+EXPORT_SYMBOL(net_dim_get_tx_irq_moder);
+
+void net_dim_set_rx_mode(struct net_device *dev, u8 rx_mode)
+{
+ WRITE_ONCE(dev->irq_moder->dim_rx_mode, rx_mode);
+}
+
+void net_dim_set_tx_mode(struct net_device *dev, u8 tx_mode)
+{
+ WRITE_ONCE(dev->irq_moder->dim_tx_mode, tx_mode);
+}
+
static int net_dim_step(struct dim *dim)
{
if (dim->tired == (NET_DIM_PARAMS_NUM_PROFILES * 2))
--
2.32.0.3.g01195cf9f
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