Commit 26793bfb authored by Amritha Nambiar's avatar Amritha Nambiar Committed by Jakub Kicinski
Browse files

net: Add NAPI IRQ support 



Add support to associate the interrupt vector number for a
NAPI instance.

Signed-off-by: default avatarAmritha Nambiar <amritha.nambiar@intel.com>
Reviewed-by: default avatarSridhar Samudrala <sridhar.samudrala@intel.com>
Link: https://lore.kernel.org/r/170147334728.5260.13221803396905901904.stgit@anambiarhost.jf.intel.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 5a5131d6

drivers/net/ethernet/intel/ice/ice_lib.c

+2 −0
Original line number Diff line number Diff line
@@ -2978,6 +2978,8 @@ void ice_q_vector_set_napi_queues(struct ice_q_vector *q_vector, bool locked) 
		ice_queue_set_napi(q_vector->vsi->netdev, tx_ring->q_index,

				   NETDEV_QUEUE_TYPE_TX, &q_vector->napi,

				   locked);

	/* Also set the interrupt number for the NAPI */

	netif_napi_set_irq(&q_vector->napi, q_vector->irq.virq);

}



/**

include/linux/netdevice.h

+6 −0
Original line number Diff line number Diff line
@@ -382,6 +382,7 @@ struct napi_struct { 
	/* control-path-only fields follow */

	struct list_head	dev_list;

	struct hlist_node	napi_hash_node;

	int			irq;

};



enum {
@@ -2665,6 +2666,11 @@ void netif_queue_set_napi(struct net_device *dev, unsigned int queue_index, 
			  enum netdev_queue_type type,

			  struct napi_struct *napi);



static inline void netif_napi_set_irq(struct napi_struct *napi, int irq)

{

	napi->irq = irq;

}



/* Default NAPI poll() weight

 * Device drivers are strongly advised to not use bigger value

 */

net/core/dev.c

+1 −0
Original line number Diff line number Diff line
@@ -6471,6 +6471,7 @@ void netif_napi_add_weight(struct net_device *dev, struct napi_struct *napi, 
	 */

	if (dev->threaded && napi_kthread_create(napi))

		dev->threaded = 0;

	netif_napi_set_irq(napi, -1);

}

EXPORT_SYMBOL(netif_napi_add_weight);

net/core/netdev-genl.c

+4 −0
Original line number Diff line number Diff line
@@ -180,7 +180,11 @@ netdev_nl_napi_fill_one(struct sk_buff *rsp, struct napi_struct *napi, 
	if (nla_put_u32(rsp, NETDEV_A_NAPI_IFINDEX, napi->dev->ifindex))

		goto nla_put_failure;



	if (napi->irq >= 0 && nla_put_u32(rsp, NETDEV_A_NAPI_IRQ, napi->irq))

		goto nla_put_failure;



	genlmsg_end(rsp, hdr);



	return 0;



nla_put_failure: