Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:
 "Highlights:

   1) Steady transitioning of the BPF instructure to a generic spot so
      all kernel subsystems can make use of it, from Alexei Starovoitov.

   2) SFC driver supports busy polling, from Alexandre Rames.

   3) Take advantage of hash table in UDP multicast delivery, from David
      Held.

   4) Lighten locking, in particular by getting rid of the LRU lists, in
      inet frag handling.  From Florian Westphal.

   5) Add support for various RFC6458 control messages in SCTP, from
      Geir Ola Vaagland.

   6) Allow to filter bridge forwarding database dumps by device, from
      Jamal Hadi Salim.

   7) virtio-net also now supports busy polling, from Jason Wang.

   8) Some low level optimization tweaks in pktgen from Jesper Dangaard
      Brouer.

   9) Add support for ipv6 address generation modes, so that userland
      can have some input into the process.  From Jiri Pirko.

  10) Consolidate common TCP connection request code in ipv4 and ipv6,
      from Octavian Purdila.

  11) New ARP packet logger in netfilter, from Pablo Neira Ayuso.

  12) Generic resizable RCU hash table, with intial users in netlink and
      nftables.  From Thomas Graf.

  13) Maintain a name assignment type so that userspace can see where a
      network device name came from (enumerated by kernel, assigned
      explicitly by userspace, etc.) From Tom Gundersen.

  14) Automatic flow label generation on transmit in ipv6, from Tom
      Herbert.

  15) New packet timestamping facilities from Willem de Bruijn, meant to
      assist in measuring latencies going into/out-of the packet
      scheduler, latency from TCP data transmission to ACK, etc"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1536 commits)
  cxgb4 : Disable recursive mailbox commands when enabling vi
  net: reduce USB network driver config options.
  tg3: Modify tg3_tso_bug() to handle multiple TX rings
  amd-xgbe: Perform phy connect/disconnect at dev open/stop
  amd-xgbe: Use dma_set_mask_and_coherent to set DMA mask
  net: sun4i-emac: fix memory leak on bad packet
  sctp: fix possible seqlock seadlock in sctp_packet_transmit()
  Revert "net: phy: Set the driver when registering an MDIO bus device"
  cxgb4vf: Turn off SGE RX/TX Callback Timers and interrupts in PCI shutdown routine
  team: Simplify return path of team_newlink
  bridge: Update outdated comment on promiscuous mode
  net-timestamp: ACK timestamp for bytestreams
  net-timestamp: TCP timestamping
  net-timestamp: SCHED timestamp on entering packet scheduler
  net-timestamp: add key to disambiguate concurrent datagrams
  net-timestamp: move timestamp flags out of sk_flags
  net-timestamp: extend SCM_TIMESTAMPING ancillary data struct
  cxgb4i : Move stray CPL definitions to cxgb4 driver
  tcp: reduce spurious retransmits due to transient SACK reneging
  qlcnic: Initialize dcbnl_ops before register_netdev
  ...

1 files changed, 122 insertions, 0 deletions

diff --git a/drivers/net/ethernet/cisco/enic/vnic_rq.h b/drivers/net/ethernet/cisco/enic/vnic_rq.h
index ee7bc95af278..8111d5202df2 100644
--- a/drivers/net/ethernet/cisco/enic/vnic_rq.h
+++ b/drivers/net/ethernet/cisco/enic/vnic_rq.h
@@ -85,6 +85,21 @@ struct vnic_rq {
 	struct vnic_rq_buf *to_clean;
 	void *os_buf_head;
 	unsigned int pkts_outstanding;
+#ifdef CONFIG_NET_RX_BUSY_POLL
+#define ENIC_POLL_STATE_IDLE		0
+#define ENIC_POLL_STATE_NAPI		(1 << 0) /* NAPI owns this poll */
+#define ENIC_POLL_STATE_POLL		(1 << 1) /* poll owns this poll */
+#define ENIC_POLL_STATE_NAPI_YIELD	(1 << 2) /* NAPI yielded this poll */
+#define ENIC_POLL_STATE_POLL_YIELD	(1 << 3) /* poll yielded this poll */
+#define ENIC_POLL_YIELD			(ENIC_POLL_STATE_NAPI_YIELD |	\
+					 ENIC_POLL_STATE_POLL_YIELD)
+#define ENIC_POLL_LOCKED		(ENIC_POLL_STATE_NAPI |		\
+					 ENIC_POLL_STATE_POLL)
+#define ENIC_POLL_USER_PEND		(ENIC_POLL_STATE_POLL |		\
+					 ENIC_POLL_STATE_POLL_YIELD)
+	unsigned int bpoll_state;
+	spinlock_t bpoll_lock;
+#endif /* CONFIG_NET_RX_BUSY_POLL */
 };
 
 static inline unsigned int vnic_rq_desc_avail(struct vnic_rq *rq)
@@ -197,6 +212,113 @@ static inline int vnic_rq_fill(struct vnic_rq *rq,
 	return 0;
 }
 
+#ifdef CONFIG_NET_RX_BUSY_POLL
+static inline void enic_busy_poll_init_lock(struct vnic_rq *rq)
+{
+	spin_lock_init(&rq->bpoll_lock);
+	rq->bpoll_state = ENIC_POLL_STATE_IDLE;
+}
+
+static inline bool enic_poll_lock_napi(struct vnic_rq *rq)
+{
+	bool rc = true;
+
+	spin_lock(&rq->bpoll_lock);
+	if (rq->bpoll_state & ENIC_POLL_LOCKED) {
+		WARN_ON(rq->bpoll_state & ENIC_POLL_STATE_NAPI);
+		rq->bpoll_state |= ENIC_POLL_STATE_NAPI_YIELD;
+		rc = false;
+	} else {
+		rq->bpoll_state = ENIC_POLL_STATE_NAPI;
+	}
+	spin_unlock(&rq->bpoll_lock);
+
+	return rc;
+}
+
+static inline bool enic_poll_unlock_napi(struct vnic_rq *rq)
+{
+	bool rc = false;
+
+	spin_lock(&rq->bpoll_lock);
+	WARN_ON(rq->bpoll_state &
+		(ENIC_POLL_STATE_POLL | ENIC_POLL_STATE_NAPI_YIELD));
+	if (rq->bpoll_state & ENIC_POLL_STATE_POLL_YIELD)
+		rc = true;
+	rq->bpoll_state = ENIC_POLL_STATE_IDLE;
+	spin_unlock(&rq->bpoll_lock);
+
+	return rc;
+}
+
+static inline bool enic_poll_lock_poll(struct vnic_rq *rq)
+{
+	bool rc = true;
+
+	spin_lock_bh(&rq->bpoll_lock);
+	if (rq->bpoll_state & ENIC_POLL_LOCKED) {
+		rq->bpoll_state |= ENIC_POLL_STATE_POLL_YIELD;
+		rc = false;
+	} else {
+		rq->bpoll_state |= ENIC_POLL_STATE_POLL;
+	}
+	spin_unlock_bh(&rq->bpoll_lock);
+
+	return rc;
+}
+
+static inline bool enic_poll_unlock_poll(struct vnic_rq *rq)
+{
+	bool rc = false;
+
+	spin_lock_bh(&rq->bpoll_lock);
+	WARN_ON(rq->bpoll_state & ENIC_POLL_STATE_NAPI);
+	if (rq->bpoll_state & ENIC_POLL_STATE_POLL_YIELD)
+		rc = true;
+	rq->bpoll_state = ENIC_POLL_STATE_IDLE;
+	spin_unlock_bh(&rq->bpoll_lock);
+
+	return rc;
+}
+
+static inline bool enic_poll_busy_polling(struct vnic_rq *rq)
+{
+	WARN_ON(!(rq->bpoll_state & ENIC_POLL_LOCKED));
+	return rq->bpoll_state & ENIC_POLL_USER_PEND;
+}
+
+#else
+
+static inline void enic_busy_poll_init_lock(struct vnic_rq *rq)
+{
+}
+
+static inline bool enic_poll_lock_napi(struct vnic_rq *rq)
+{
+	return true;
+}
+
+static inline bool enic_poll_unlock_napi(struct vnic_rq *rq)
+{
+	return false;
+}
+
+static inline bool enic_poll_lock_poll(struct vnic_rq *rq)
+{
+	return false;
+}
+
+static inline bool enic_poll_unlock_poll(struct vnic_rq *rq)
+{
+	return false;
+}
+
+static inline bool enic_poll_ll_polling(struct vnic_rq *rq)
+{
+	return false;
+}
+#endif /* CONFIG_NET_RX_BUSY_POLL */
+
 void vnic_rq_free(struct vnic_rq *rq);
 int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index,
 	unsigned int desc_count, unsigned int desc_size);