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Message-ID: <20240430010732.666512-2-dw@davidwei.uk>
Date: Mon, 29 Apr 2024 18:07:30 -0700
From: David Wei <dw@...idwei.uk>
To: netdev@...r.kernel.org,
Michael Chan <michael.chan@...adcom.com>,
Pavan Chebbi <pavan.chebbi@...adcom.com>,
Andy Gospodarek <andrew.gospodarek@...adcom.com>,
Mina Almasry <almasrymina@...gle.com>,
Shailend Chand <shailend@...gle.com>
Cc: Jakub Kicinski <kuba@...nel.org>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Paolo Abeni <pabeni@...hat.com>
Subject: [RFC PATCH net-next v1 1/3] 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: David Wei <dw@...idwei.uk>
---
include/linux/netdevice.h | 3 +++
include/net/netdev_queues.h | 27 +++++++++++++++++++++++++++
2 files changed, 30 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 1ec408585373..337df0860ae6 100644
--- a/include/net/netdev_queues.h
+++ b/include/net/netdev_queues.h
@@ -60,6 +60,33 @@ struct netdev_stat_ops {
struct netdev_queue_stats_tx *tx);
};
+/**
+ * struct netdev_queue_mgmt_ops - netdev ops for queue management
+ *
+ * @ndo_queue_mem_alloc: Allocate memory for an RX queue. The memory returned
+ * in the form of a void* can be passed to
+ * ndo_queue_mem_free() for freeing or to ndo_queue_start
+ * to create an RX queue with this memory.
+ *
+ * @ndo_queue_mem_free: Free memory from an RX queue.
+ *
+ * @ndo_queue_start: Start an RX queue at the specified index.
+ *
+ * @ndo_queue_stop: Stop the RX queue at the specified index.
+ */
+struct netdev_queue_mgmt_ops {
+ void * (*ndo_queue_mem_alloc)(struct net_device *dev,
+ int idx);
+ void (*ndo_queue_mem_free)(struct net_device *dev,
+ void *queue_mem);
+ int (*ndo_queue_start)(struct net_device *dev,
+ int idx,
+ void *queue_mem);
+ int (*ndo_queue_stop)(struct net_device *dev,
+ int idx,
+ void **out_queue_mem);
+};
+
/**
* DOC: Lockless queue stopping / waking helpers.
*
--
2.43.0
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