Commit 087b24de authored by Mina Almasry's avatar Mina Almasry Committed by David S. Miller
Browse files

queue_api: define queue api 



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

Signed-off-by: default avatarMina Almasry <almasrymina@google.com>
Signed-off-by: default avatarShailend Chand <shailend@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 173e7622

include/linux/netdevice.h

+3 −0
Original line number Diff line number Diff line
@@ -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

include/net/netdev_queues.h

+31 −0
Original line number Diff line number Diff line
@@ -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.

 *