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

Pull networking updates from David Miller:

 1) The addition of nftables.  No longer will we need protocol aware
    firewall filtering modules, it can all live in userspace.

    At the core of nftables is a, for lack of a better term, virtual
    machine that executes byte codes to inspect packet or metadata
    (arriving interface index, etc.) and make verdict decisions.

    Besides support for loading packet contents and comparing them, the
    interpreter supports lookups in various datastructures as
    fundamental operations.  For example sets are supports, and
    therefore one could create a set of whitelist IP address entries
    which have ACCEPT verdicts attached to them, and use the appropriate
    byte codes to do such lookups.

    Since the interpreted code is composed in userspace, userspace can
    do things like optimize things before giving it to the kernel.

    Another major improvement is the capability of atomically updating
    portions of the ruleset.  In the existing netfilter implementation,
    one has to update the entire rule set in order to make a change and
    this is very expensive.

    Userspace tools exist to create nftables rules using existing
    netfilter rule sets, but both kernel implementations will need to
    co-exist for quite some time as we transition from the old to the
    new stuff.

    Kudos to Patrick McHardy, Pablo Neira Ayuso, and others who have
    worked so hard on this.

 2) Daniel Borkmann and Hannes Frederic Sowa made several improvements
    to our pseudo-random number generator, mostly used for things like
    UDP port randomization and netfitler, amongst other things.

    In particular the taus88 generater is updated to taus113, and test
    cases are added.

 3) Support 64-bit rates in HTB and TBF schedulers, from Eric Dumazet
    and Yang Yingliang.

 4) Add support for new 577xx tigon3 chips to tg3 driver, from Nithin
    Sujir.

 5) Fix two fatal flaws in TCP dynamic right sizing, from Eric Dumazet,
    Neal Cardwell, and Yuchung Cheng.

 6) Allow IP_TOS and IP_TTL to be specified in sendmsg() ancillary
    control message data, much like other socket option attributes.
    From Francesco Fusco.

 7) Allow applications to specify a cap on the rate computed
    automatically by the kernel for pacing flows, via a new
    SO_MAX_PACING_RATE socket option.  From Eric Dumazet.

 8) Make the initial autotuned send buffer sizing in TCP more closely
    reflect actual needs, from Eric Dumazet.

 9) Currently early socket demux only happens for TCP sockets, but we
    can do it for connected UDP sockets too.  Implementation from Shawn
    Bohrer.

10) Refactor inet socket demux with the goal of improving hash demux
    performance for listening sockets.  With the main goals being able
    to use RCU lookups on even request sockets, and eliminating the
    listening lock contention.  From Eric Dumazet.

11) The bonding layer has many demuxes in it's fast path, and an RCU
    conversion was started back in 3.11, several changes here extend the
    RCU usage to even more locations.  From Ding Tianhong and Wang
    Yufen, based upon suggestions by Nikolay Aleksandrov and Veaceslav
    Falico.

12) Allow stackability of segmentation offloads to, in particular, allow
    segmentation offloading over tunnels.  From Eric Dumazet.

13) Significantly improve the handling of secret keys we input into the
    various hash functions in the inet hashtables, TCP fast open, as
    well as syncookies.  From Hannes Frederic Sowa.  The key fundamental
    operation is "net_get_random_once()" which uses static keys.

    Hannes even extended this to ipv4/ipv6 fragmentation handling and
    our generic flow dissector.

14) The generic driver layer takes care now to set the driver data to
    NULL on device removal, so it's no longer necessary for drivers to
    explicitly set it to NULL any more.  Many drivers have been cleaned
    up in this way, from Jingoo Han.

15) Add a BPF based packet scheduler classifier, from Daniel Borkmann.

16) Improve CRC32 interfaces and generic SKB checksum iterators so that
    SCTP's checksumming can more cleanly be handled.  Also from Daniel
    Borkmann.

17) Add a new PMTU discovery mode, IP_PMTUDISC_INTERFACE, which forces
    using the interface MTU value.  This helps avoid PMTU attacks,
    particularly on DNS servers.  From Hannes Frederic Sowa.

18) Use generic XPS for transmit queue steering rather than internal
    (re-)implementation in virtio-net.  From Jason Wang.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1622 commits)
  random32: add test cases for taus113 implementation
  random32: upgrade taus88 generator to taus113 from errata paper
  random32: move rnd_state to linux/random.h
  random32: add prandom_reseed_late() and call when nonblocking pool becomes initialized
  random32: add periodic reseeding
  random32: fix off-by-one in seeding requirement
  PHY: Add RTL8201CP phy_driver to realtek
  xtsonic: add missing platform_set_drvdata() in xtsonic_probe()
  macmace: add missing platform_set_drvdata() in mace_probe()
  ethernet/arc/arc_emac: add missing platform_set_drvdata() in arc_emac_probe()
  ipv6: protect for_each_sk_fl_rcu in mem_check with rcu_read_lock_bh
  vlan: Implement vlan_dev_get_egress_qos_mask as an inline.
  ixgbe: add warning when max_vfs is out of range.
  igb: Update link modes display in ethtool
  netfilter: push reasm skb through instead of original frag skbs
  ip6_output: fragment outgoing reassembled skb properly
  MAINTAINERS: mv643xx_eth: take over maintainership from Lennart
  net_sched: tbf: support of 64bit rates
  ixgbe: deleting dfwd stations out of order can cause null ptr deref
  ixgbe: fix build err, num_rx_queues is only available with CONFIG_RPS
  ...

1 files changed, 21 insertions, 105 deletions

diff --git a/drivers/net/wireless/ath/ath10k/ce.h b/drivers/net/wireless/ath/ath10k/ce.h
index c17f07c..15d45b5 100644
--- a/drivers/net/wireless/ath/ath10k/ce.h
+++ b/drivers/net/wireless/ath/ath10k/ce.h
@@ -27,7 +27,6 @@
 
 /* Descriptor rings must be aligned to this boundary */
 #define CE_DESC_RING_ALIGN	8
-#define CE_SENDLIST_ITEMS_MAX	12
 #define CE_SEND_FLAG_GATHER	0x00010000
 
 /*
@@ -36,16 +35,9 @@
  * how to use copy engines.
  */
 
-struct ce_state;
+struct ath10k_ce_pipe;
 
 
-/* Copy Engine operational state */
-enum ce_op_state {
-	CE_UNUSED,
-	CE_PAUSED,
-	CE_RUNNING,
-};
-
 #define CE_DESC_FLAGS_GATHER         (1 << 0)
 #define CE_DESC_FLAGS_BYTE_SWAP      (1 << 1)
 #define CE_DESC_FLAGS_META_DATA_MASK 0xFFFC
@@ -57,8 +49,7 @@ struct ce_desc {
 	__le16 flags; /* %CE_DESC_FLAGS_ */
 };
 
-/* Copy Engine Ring internal state */
-struct ce_ring_state {
+struct ath10k_ce_ring {
 	/* Number of entries in this ring; must be power of 2 */
 	unsigned int nentries;
 	unsigned int nentries_mask;
@@ -116,49 +107,20 @@ struct ce_ring_state {
 	void **per_transfer_context;
 };
 
-/* Copy Engine internal state */
-struct ce_state {
+struct ath10k_ce_pipe {
 	struct ath10k *ar;
 	unsigned int id;
 
 	unsigned int attr_flags;
 
 	u32 ctrl_addr;
-	enum ce_op_state state;
-
-	void (*send_cb) (struct ce_state *ce_state,
-			 void *per_transfer_send_context,
-			 u32 buffer,
-			 unsigned int nbytes,
-			 unsigned int transfer_id);
-	void (*recv_cb) (struct ce_state *ce_state,
-			 void *per_transfer_recv_context,
-			 u32 buffer,
-			 unsigned int nbytes,
-			 unsigned int transfer_id,
-			 unsigned int flags);
-
-	unsigned int src_sz_max;
-	struct ce_ring_state *src_ring;
-	struct ce_ring_state *dest_ring;
-};
 
-struct ce_sendlist_item {
-	/* e.g. buffer or desc list */
-	dma_addr_t data;
-	union {
-		/* simple buffer */
-		unsigned int nbytes;
-		/* Rx descriptor list */
-		unsigned int ndesc;
-	} u;
-	/* externally-specified flags; OR-ed with internal flags */
-	u32 flags;
-};
+	void (*send_cb)(struct ath10k_ce_pipe *);
+	void (*recv_cb)(struct ath10k_ce_pipe *);
 
-struct ce_sendlist {
-	unsigned int num_items;
-	struct ce_sendlist_item item[CE_SENDLIST_ITEMS_MAX];
+	unsigned int src_sz_max;
+	struct ath10k_ce_ring *src_ring;
+	struct ath10k_ce_ring *dest_ring;
 };
 
 /* Copy Engine settable attributes */
@@ -182,7 +144,7 @@ struct ce_attr;
  *
  * Implementation note: pushes 1 buffer to Source ring
  */
-int ath10k_ce_send(struct ce_state *ce_state,
+int ath10k_ce_send(struct ath10k_ce_pipe *ce_state,
 		   void *per_transfer_send_context,
 		   u32 buffer,
 		   unsigned int nbytes,
@@ -190,36 +152,11 @@ int ath10k_ce_send(struct ce_state *ce_state,
 		   unsigned int transfer_id,
 		   unsigned int flags);
 
-void ath10k_ce_send_cb_register(struct ce_state *ce_state,
-				void (*send_cb) (struct ce_state *ce_state,
-						 void *transfer_context,
-						 u32 buffer,
-						 unsigned int nbytes,
-						 unsigned int transfer_id),
+void ath10k_ce_send_cb_register(struct ath10k_ce_pipe *ce_state,
+				void (*send_cb)(struct ath10k_ce_pipe *),
 				int disable_interrupts);
 
-/* Append a simple buffer (address/length) to a sendlist. */
-void ath10k_ce_sendlist_buf_add(struct ce_sendlist *sendlist,
-				u32 buffer,
-				unsigned int nbytes,
-				/* OR-ed with internal flags */
-				u32 flags);
-
-/*
- * Queue a "sendlist" of buffers to be sent using gather to a single
- * anonymous destination buffer
- *   ce         - which copy engine to use
- *   sendlist        - list of simple buffers to send using gather
- *   transfer_id     - arbitrary ID; reflected to destination
- * Returns 0 on success; otherwise an error status.
- *
- * Implemenation note: Pushes multiple buffers with Gather to Source ring.
- */
-int ath10k_ce_sendlist_send(struct ce_state *ce_state,
-			    void *per_transfer_send_context,
-			    struct ce_sendlist *sendlist,
-			    /* 14 bits */
-			    unsigned int transfer_id);
+int ath10k_ce_num_free_src_entries(struct ath10k_ce_pipe *pipe);
 
 /*==================Recv=======================*/
 
@@ -233,17 +170,12 @@ int ath10k_ce_sendlist_send(struct ce_state *ce_state,
  *
  * Implemenation note: Pushes a buffer to Dest ring.
  */
-int ath10k_ce_recv_buf_enqueue(struct ce_state *ce_state,
+int ath10k_ce_recv_buf_enqueue(struct ath10k_ce_pipe *ce_state,
 			       void *per_transfer_recv_context,
 			       u32 buffer);
 
-void ath10k_ce_recv_cb_register(struct ce_state *ce_state,
-				void (*recv_cb) (struct ce_state *ce_state,
-						 void *transfer_context,
-						 u32 buffer,
-						 unsigned int nbytes,
-						 unsigned int transfer_id,
-						 unsigned int flags));
+void ath10k_ce_recv_cb_register(struct ath10k_ce_pipe *ce_state,
+				void (*recv_cb)(struct ath10k_ce_pipe *));
 
 /* recv flags */
 /* Data is byte-swapped */
@@ -253,7 +185,7 @@ void ath10k_ce_recv_cb_register(struct ce_state *ce_state,
  * Supply data for the next completed unprocessed receive descriptor.
  * Pops buffer from Dest ring.
  */
-int ath10k_ce_completed_recv_next(struct ce_state *ce_state,
+int ath10k_ce_completed_recv_next(struct ath10k_ce_pipe *ce_state,
 				  void **per_transfer_contextp,
 				  u32 *bufferp,
 				  unsigned int *nbytesp,
@@ -263,7 +195,7 @@ int ath10k_ce_completed_recv_next(struct ce_state *ce_state,
  * Supply data for the next completed unprocessed send descriptor.
  * Pops 1 completed send buffer from Source ring.
  */
-int ath10k_ce_completed_send_next(struct ce_state *ce_state,
+int ath10k_ce_completed_send_next(struct ath10k_ce_pipe *ce_state,
 			   void **per_transfer_contextp,
 			   u32 *bufferp,
 			   unsigned int *nbytesp,
@@ -272,7 +204,7 @@ int ath10k_ce_completed_send_next(struct ce_state *ce_state,
 /*==================CE Engine Initialization=======================*/
 
 /* Initialize an instance of a CE */
-struct ce_state *ath10k_ce_init(struct ath10k *ar,
+struct ath10k_ce_pipe *ath10k_ce_init(struct ath10k *ar,
 				unsigned int ce_id,
 				const struct ce_attr *attr);
 
@@ -282,7 +214,7 @@ struct ce_state *ath10k_ce_init(struct ath10k *ar,
  * receive buffers.  Target DMA must be stopped before using
  * this API.
  */
-int ath10k_ce_revoke_recv_next(struct ce_state *ce_state,
+int ath10k_ce_revoke_recv_next(struct ath10k_ce_pipe *ce_state,
 			       void **per_transfer_contextp,
 			       u32 *bufferp);
 
@@ -291,13 +223,13 @@ int ath10k_ce_revoke_recv_next(struct ce_state *ce_state,
  * pending sends.  Target DMA must be stopped before using
  * this API.
  */
-int ath10k_ce_cancel_send_next(struct ce_state *ce_state,
+int ath10k_ce_cancel_send_next(struct ath10k_ce_pipe *ce_state,
 			       void **per_transfer_contextp,
 			       u32 *bufferp,
 			       unsigned int *nbytesp,
 			       unsigned int *transfer_idp);
 
-void ath10k_ce_deinit(struct ce_state *ce_state);
+void ath10k_ce_deinit(struct ath10k_ce_pipe *ce_state);
 
 /*==================CE Interrupt Handlers====================*/
 void ath10k_ce_per_engine_service_any(struct ath10k *ar);
@@ -322,9 +254,6 @@ struct ce_attr {
 	/* CE_ATTR_* values */
 	unsigned int flags;
 
-	/* currently not in use */
-	unsigned int priority;
-
 	/* #entries in source ring - Must be a power of 2 */
 	unsigned int src_nentries;
 
@@ -336,21 +265,8 @@ struct ce_attr {
 
 	/* #entries in destination ring - Must be a power of 2 */
 	unsigned int dest_nentries;
-
-	/* Future use */
-	void *reserved;
 };
 
-/*
- * When using sendlist_send to transfer multiple buffer fragments, the
- * transfer context of each fragment, except last one, will be filled
- * with CE_SENDLIST_ITEM_CTXT. ce_completed_send will return success for
- * each fragment done with send and the transfer context would be
- * CE_SENDLIST_ITEM_CTXT. Upper layer could use this to identify the
- * status of a send completion.
- */
-#define CE_SENDLIST_ITEM_CTXT	((void *)0xcecebeef)
-
 #define SR_BA_ADDRESS		0x0000
 #define SR_SIZE_ADDRESS		0x0004
 #define DR_BA_ADDRESS		0x0008