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Message-ID: <20240403002053.2376017-2-almasrymina@google.com>
Date: Tue,  2 Apr 2024 17:20:38 -0700
From: Mina Almasry <almasrymina@...gle.com>
To: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-doc@...r.kernel.org, linux-alpha@...r.kernel.org, 
	linux-mips@...r.kernel.org, linux-parisc@...r.kernel.org, 
	sparclinux@...r.kernel.org, linux-trace-kernel@...r.kernel.org, 
	linux-arch@...r.kernel.org, bpf@...r.kernel.org, 
	linux-kselftest@...r.kernel.org, linux-media@...r.kernel.org, 
	dri-devel@...ts.freedesktop.org
Cc: Mina Almasry <almasrymina@...gle.com>, "David S. Miller" <davem@...emloft.net>, 
	Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Jonathan Corbet <corbet@....net>, Richard Henderson <richard.henderson@...aro.org>, 
	Ivan Kokshaysky <ink@...assic.park.msu.ru>, Matt Turner <mattst88@...il.com>, 
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>, 
	"James E.J. Bottomley" <James.Bottomley@...senPartnership.com>, Helge Deller <deller@....de>, 
	Andreas Larsson <andreas@...sler.com>, Jesper Dangaard Brouer <hawk@...nel.org>, 
	Ilias Apalodimas <ilias.apalodimas@...aro.org>, Steven Rostedt <rostedt@...dmis.org>, 
	Masami Hiramatsu <mhiramat@...nel.org>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, 
	Arnd Bergmann <arnd@...db.de>, Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, 
	Andrii Nakryiko <andrii@...nel.org>, Martin KaFai Lau <martin.lau@...ux.dev>, 
	Eduard Zingerman <eddyz87@...il.com>, Song Liu <song@...nel.org>, 
	Yonghong Song <yonghong.song@...ux.dev>, John Fastabend <john.fastabend@...il.com>, 
	KP Singh <kpsingh@...nel.org>, Stanislav Fomichev <sdf@...gle.com>, Hao Luo <haoluo@...gle.com>, 
	Jiri Olsa <jolsa@...nel.org>, Steffen Klassert <steffen.klassert@...unet.com>, 
	Herbert Xu <herbert@...dor.apana.org.au>, David Ahern <dsahern@...nel.org>, 
	Willem de Bruijn <willemdebruijn.kernel@...il.com>, Shuah Khan <shuah@...nel.org>, 
	Sumit Semwal <sumit.semwal@...aro.org>, 
	"Christian König" <christian.koenig@....com>, Amritha Nambiar <amritha.nambiar@...el.com>, 
	Maciej Fijalkowski <maciej.fijalkowski@...el.com>, 
	Alexander Mikhalitsyn <alexander@...alicyn.com>, Kaiyuan Zhang <kaiyuanz@...gle.com>, 
	Christian Brauner <brauner@...nel.org>, Simon Horman <horms@...nel.org>, 
	David Howells <dhowells@...hat.com>, Florian Westphal <fw@...len.de>, 
	Yunsheng Lin <linyunsheng@...wei.com>, Kuniyuki Iwashima <kuniyu@...zon.com>, Jens Axboe <axboe@...nel.dk>, 
	Arseniy Krasnov <avkrasnov@...utedevices.com>, 
	Aleksander Lobakin <aleksander.lobakin@...el.com>, Michael Lass <bevan@...co.net>, 
	Jiri Pirko <jiri@...nulli.us>, Sebastian Andrzej Siewior <bigeasy@...utronix.de>, 
	Lorenzo Bianconi <lorenzo@...nel.org>, Richard Gobert <richardbgobert@...il.com>, 
	Sridhar Samudrala <sridhar.samudrala@...el.com>, Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, 
	Johannes Berg <johannes.berg@...el.com>, Abel Wu <wuyun.abel@...edance.com>, 
	Breno Leitao <leitao@...ian.org>, Pavel Begunkov <asml.silence@...il.com>, David Wei <dw@...idwei.uk>, 
	Jason Gunthorpe <jgg@...pe.ca>, Shailend Chand <shailend@...gle.com>, 
	Harshitha Ramamurthy <hramamurthy@...gle.com>, Shakeel Butt <shakeel.butt@...ux.dev>, 
	Jeroen de Borst <jeroendb@...gle.com>, Praveen Kaligineedi <pkaligineedi@...gle.com>
Subject: [RFC PATCH net-next v8 01/14] queue_api: define queue api

This API enables the net stack to reset the queues used for devmem TCP.

Signed-off-by: Mina Almasry <almasrymina@...gle.com>

---
 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 7d12b5a9380f..a0bd542d143a 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
@@ -2339,6 +2340,8 @@ 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.
  *
-- 
2.44.0.478.gd926399ef9-goog


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