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Message-ID: <20240501232549.1327174-2-shailend@google.com>
Date: Wed, 1 May 2024 23:25:40 +0000
From: Shailend Chand <shailend@...gle.com>
To: netdev@...r.kernel.org
Cc: almasrymina@...gle.com, davem@...emloft.net, edumazet@...gle.com,
hramamurthy@...gle.com, jeroendb@...gle.com, kuba@...nel.org,
pabeni@...hat.com, pkaligineedi@...gle.com, rushilg@...gle.com,
willemb@...gle.com, ziweixiao@...gle.com,
Shailend Chand <shailend@...gle.com>
Subject: [PATCH net-next v2 01/10] queue_api: define queue api
From: Mina Almasry <almasrymina@...gle.com>
This API enables the net stack to reset the queues used for devmem TCP.
Signed-off-by: Mina Almasry <almasrymina@...gle.com>
Signed-off-by: Shailend Chand <shailend@...gle.com>
---
include/linux/netdevice.h | 3 +++
include/net/netdev_queues.h | 31 +++++++++++++++++++++++++++++++
2 files changed, 34 insertions(+)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index f849e7d110ed..6a58ec73c5e8 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1957,6 +1957,7 @@ enum netdev_reg_state {
* @sysfs_rx_queue_group: Space for optional per-rx queue attributes
* @rtnl_link_ops: Rtnl_link_ops
* @stat_ops: Optional ops for queue-aware statistics
+ * @queue_mgmt_ops: Optional ops for queue management
*
* @gso_max_size: Maximum size of generic segmentation offload
* @tso_max_size: Device (as in HW) limit on the max TSO request size
@@ -2340,6 +2341,8 @@ struct net_device {
const struct netdev_stat_ops *stat_ops;
+ const struct netdev_queue_mgmt_ops *queue_mgmt_ops;
+
/* for setting kernel sock attribute on TCP connection setup */
#define GSO_MAX_SEGS 65535u
#define GSO_LEGACY_MAX_SIZE 65536u
diff --git a/include/net/netdev_queues.h b/include/net/netdev_queues.h
index c7ac4539eafc..e7b84f018cee 100644
--- a/include/net/netdev_queues.h
+++ b/include/net/netdev_queues.h
@@ -87,6 +87,37 @@ struct netdev_stat_ops {
struct netdev_queue_stats_tx *tx);
};
+/**
+ * struct netdev_queue_mgmt_ops - netdev ops for queue management
+ *
+ * @ndo_queue_mem_size: Size of the struct that describes a queue's memory.
+ *
+ * @ndo_queue_mem_alloc: Allocate memory for an RX queue at the specified index.
+ * The new memory is written at the specified address.
+ *
+ * @ndo_queue_mem_free: Free memory from an RX queue.
+ *
+ * @ndo_queue_start: Start an RX queue with the specified memory and at the
+ * specified index.
+ *
+ * @ndo_queue_stop: Stop the RX queue at the specified index. The stopped
+ * queue's memory is written at the specified address.
+ */
+struct netdev_queue_mgmt_ops {
+ size_t ndo_queue_mem_size;
+ int (*ndo_queue_mem_alloc)(struct net_device *dev,
+ void *per_queue_mem,
+ int idx);
+ void (*ndo_queue_mem_free)(struct net_device *dev,
+ void *per_queue_mem);
+ int (*ndo_queue_start)(struct net_device *dev,
+ void *per_queue_mem,
+ int idx);
+ int (*ndo_queue_stop)(struct net_device *dev,
+ void *per_queue_mem,
+ int idx);
+};
+
/**
* DOC: Lockless queue stopping / waking helpers.
*
--
2.45.0.rc0.197.gbae5840b3b-goog
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