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

Pull networking updates from David Miller:
 "Highlights (1721 non-merge commits, this has to be a record of some
  sort):

   1) Add 'random' mode to team driver, from Jiri Pirko and Eric
      Dumazet.

   2) Make it so that any driver that supports configuration of multiple
      MAC addresses can provide the forwarding database add and del
      calls by providing a default implementation and hooking that up if
      the driver doesn't have an explicit set of handlers.  From Vlad
      Yasevich.

   3) Support GSO segmentation over tunnels and other encapsulating
      devices such as VXLAN, from Pravin B Shelar.

   4) Support L2 GRE tunnels in the flow dissector, from Michael Dalton.

   5) Implement Tail Loss Probe (TLP) detection in TCP, from Nandita
      Dukkipati.

   6) In the PHY layer, allow supporting wake-on-lan in situations where
      the PHY registers have to be written for it to be configured.

      Use it to support wake-on-lan in mv643xx_eth.

      From Michael Stapelberg.

   7) Significantly improve firewire IPV6 support, from YOSHIFUJI
      Hideaki.

   8) Allow multiple packets to be sent in a single transmission using
      network coding in batman-adv, from Martin Hundebøll.

   9) Add support for T5 cxgb4 chips, from Santosh Rastapur.

  10) Generalize the VXLAN forwarding tables so that there is more
      flexibility in configurating various aspects of the endpoints.
      From David Stevens.

  11) Support RSS and TSO in hardware over GRE tunnels in bxn2x driver,
      from Dmitry Kravkov.

  12) Zero copy support in nfnelink_queue, from Eric Dumazet and Pablo
      Neira Ayuso.

  13) Start adding networking selftests.

  14) In situations of overload on the same AF_PACKET fanout socket, or
      per-cpu packet receive queue, minimize drop by distributing the
      load to other cpus/fanouts.  From Willem de Bruijn and Eric
      Dumazet.

  15) Add support for new payload offset BPF instruction, from Daniel
      Borkmann.

  16) Convert several drivers over to mdoule_platform_driver(), from
      Sachin Kamat.

  17) Provide a minimal BPF JIT image disassembler userspace tool, from
      Daniel Borkmann.

  18) Rewrite F-RTO implementation in TCP to match the final
      specification of it in RFC4138 and RFC5682.  From Yuchung Cheng.

  19) Provide netlink socket diag of netlink sockets ("Yo dawg, I hear
      you like netlink, so I implemented netlink dumping of netlink
      sockets.") From Andrey Vagin.

  20) Remove ugly passing of rtnetlink attributes into rtnl_doit
      functions, from Thomas Graf.

  21) Allow userspace to be able to see if a configuration change occurs
      in the middle of an address or device list dump, from Nicolas
      Dichtel.

  22) Support RFC3168 ECN protection for ipv6 fragments, from Hannes
      Frederic Sowa.

  23) Increase accuracy of packet length used by packet scheduler, from
      Jason Wang.

  24) Beginning set of changes to make ipv4/ipv6 fragment handling more
      scalable and less susceptible to overload and locking contention,
      from Jesper Dangaard Brouer.

  25) Get rid of using non-type-safe NLMSG_* macros and use nlmsg_*()
      instead.  From Hong Zhiguo.

  26) Optimize route usage in IPVS by avoiding reference counting where
      possible, from Julian Anastasov.

  27) Convert IPVS schedulers to RCU, also from Julian Anastasov.

  28) Support cpu fanouts in xt_NFQUEUE netfilter target, from Holger
      Eitzenberger.

  29) Network namespace support for nf_log, ebt_log, xt_LOG, ipt_ULOG,
      nfnetlink_log, and nfnetlink_queue.  From Gao feng.

  30) Implement RFC3168 ECN protection, from Hannes Frederic Sowa.

  31) Support several new r8169 chips, from Hayes Wang.

  32) Support tokenized interface identifiers in ipv6, from Daniel
      Borkmann.

  33) Use usbnet_link_change() helper in USB net driver, from Ming Lei.

  34) Add 802.1ad vlan offload support, from Patrick McHardy.

  35) Support mmap() based netlink communication, also from Patrick
      McHardy.

  36) Support HW timestamping in mlx4 driver, from Amir Vadai.

  37) Rationalize AF_PACKET packet timestamping when transmitting, from
      Willem de Bruijn and Daniel Borkmann.

  38) Bring parity to what's provided by /proc/net/packet socket dumping
      and the info provided by netlink socket dumping of AF_PACKET
      sockets.  From Nicolas Dichtel.

  39) Fix peeking beyond zero sized SKBs in AF_UNIX, from Benjamin
      Poirier"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1722 commits)
  filter: fix va_list build error
  af_unix: fix a fatal race with bit fields
  bnx2x: Prevent memory leak when cnic is absent
  bnx2x: correct reading of speed capabilities
  net: sctp: attribute printl with __printf for gcc fmt checks
  netlink: kconfig: move mmap i/o into netlink kconfig
  netpoll: convert mutex into a semaphore
  netlink: Fix skb ref counting.
  net_sched: act_ipt forward compat with xtables
  mlx4_en: fix a build error on 32bit arches
  Revert "bnx2x: allow nvram test to run when device is down"
  bridge: avoid OOPS if root port not found
  drivers: net: cpsw: fix kernel warn on cpsw irq enable
  sh_eth: use random MAC address if no valid one supplied
  3c509.c: call SET_NETDEV_DEV for all device types (ISA/ISAPnP/EISA)
  tg3: fix to append hardware time stamping flags
  unix/stream: fix peeking with an offset larger than data in queue
  unix/dgram: fix peeking with an offset larger than data in queue
  unix/dgram: peek beyond 0-sized skbs
  openvswitch: Remove unneeded ovs_netdev_get_ifindex()
  ...

1 files changed, 211 insertions, 0 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c
new file mode 100644
index 000000000000..b8b0eeed0f92
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c
@@ -0,0 +1,211 @@
+/*******************************************************************************
+  PTP 1588 clock using the STMMAC.
+
+  Copyright (C) 2013  Vayavya Labs Pvt Ltd
+
+  This program is free software; you can redistribute it and/or modify it
+  under the terms and conditions of the GNU General Public License,
+  version 2, as published by the Free Software Foundation.
+
+  This program is distributed in the hope it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+  more details.
+
+  You should have received a copy of the GNU General Public License along with
+  this program; if not, write to the Free Software Foundation, Inc.,
+  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+
+  The full GNU General Public License is included in this distribution in
+  the file called "COPYING".
+
+  Author: Rayagond Kokatanur <rayagond@vayavyalabs.com>
+*******************************************************************************/
+#include "stmmac.h"
+#include "stmmac_ptp.h"
+
+/**
+ * stmmac_adjust_freq
+ *
+ * @ptp: pointer to ptp_clock_info structure
+ * @ppb: desired period change in parts ber billion
+ *
+ * Description: this function will adjust the frequency of hardware clock.
+ */
+static int stmmac_adjust_freq(struct ptp_clock_info *ptp, s32 ppb)
+{
+	struct stmmac_priv *priv =
+	    container_of(ptp, struct stmmac_priv, ptp_clock_ops);
+	unsigned long flags;
+	u32 diff, addend;
+	int neg_adj = 0;
+	u64 adj;
+
+	if (ppb < 0) {
+		neg_adj = 1;
+		ppb = -ppb;
+	}
+
+	addend = priv->default_addend;
+	adj = addend;
+	adj *= ppb;
+	diff = div_u64(adj, 1000000000ULL);
+	addend = neg_adj ? (addend - diff) : (addend + diff);
+
+	spin_lock_irqsave(&priv->ptp_lock, flags);
+
+	priv->hw->ptp->config_addend(priv->ioaddr, addend);
+
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return 0;
+}
+
+/**
+ * stmmac_adjust_time
+ *
+ * @ptp: pointer to ptp_clock_info structure
+ * @delta: desired change in nanoseconds
+ *
+ * Description: this function will shift/adjust the hardware clock time.
+ */
+static int stmmac_adjust_time(struct ptp_clock_info *ptp, s64 delta)
+{
+	struct stmmac_priv *priv =
+	    container_of(ptp, struct stmmac_priv, ptp_clock_ops);
+	unsigned long flags;
+	u32 sec, nsec;
+	u32 quotient, reminder;
+	int neg_adj = 0;
+
+	if (delta < 0) {
+		neg_adj = 1;
+		delta = -delta;
+	}
+
+	quotient = div_u64_rem(delta, 1000000000ULL, &reminder);
+	sec = quotient;
+	nsec = reminder;
+
+	spin_lock_irqsave(&priv->ptp_lock, flags);
+
+	priv->hw->ptp->adjust_systime(priv->ioaddr, sec, nsec, neg_adj);
+
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return 0;
+}
+
+/**
+ * stmmac_get_time
+ *
+ * @ptp: pointer to ptp_clock_info structure
+ * @ts: pointer to hold time/result
+ *
+ * Description: this function will read the current time from the
+ * hardware clock and store it in @ts.
+ */
+static int stmmac_get_time(struct ptp_clock_info *ptp, struct timespec *ts)
+{
+	struct stmmac_priv *priv =
+	    container_of(ptp, struct stmmac_priv, ptp_clock_ops);
+	unsigned long flags;
+	u64 ns;
+	u32 reminder;
+
+	spin_lock_irqsave(&priv->ptp_lock, flags);
+
+	ns = priv->hw->ptp->get_systime(priv->ioaddr);
+
+	spin_unlock_irqrestore(&priv->ptp_lock, flags);
+
+	ts->tv_sec = div_u64_rem(ns, 1000000000ULL, &reminder);
+	ts->tv_nsec = reminder;
+
+	return 0;
+}
+
+/**
+ * stmmac_set_time
+ *
+ * @ptp: pointer to ptp_clock_info structure
+ * @ts: time value to set
+ *
+ * Description: this function will set the current time on the
+ * hardware clock.
+ */
+static int stmmac_set_time(struct ptp_clock_info *ptp,
+			   const struct timespec *ts)
+{
+	struct stmmac_priv *priv =
+	    container_of(ptp, struct stmmac_priv, ptp_clock_ops);
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->ptp_lock, flags);
+
+	priv->hw->ptp->init_systime(priv->ioaddr, ts->tv_sec, ts->tv_nsec);
+
+	spin_unlock_irqrestore(&priv->ptp_lock, flags);
+
+	return 0;
+}
+
+static int stmmac_enable(struct ptp_clock_info *ptp,
+			 struct ptp_clock_request *rq, int on)
+{
+	return -EOPNOTSUPP;
+}
+
+/* structure describing a PTP hardware clock */
+static struct ptp_clock_info stmmac_ptp_clock_ops = {
+	.owner = THIS_MODULE,
+	.name = "stmmac_ptp_clock",
+	.max_adj = 62500000,
+	.n_alarm = 0,
+	.n_ext_ts = 0,
+	.n_per_out = 0,
+	.pps = 0,
+	.adjfreq = stmmac_adjust_freq,
+	.adjtime = stmmac_adjust_time,
+	.gettime = stmmac_get_time,
+	.settime = stmmac_set_time,
+	.enable = stmmac_enable,
+};
+
+/**
+ * stmmac_ptp_register
+ * @priv: driver private structure
+ * Description: this function will register the ptp clock driver
+ * to kernel. It also does some house keeping work.
+ */
+int stmmac_ptp_register(struct stmmac_priv *priv)
+{
+	spin_lock_init(&priv->ptp_lock);
+	priv->ptp_clock_ops = stmmac_ptp_clock_ops;
+
+	priv->ptp_clock = ptp_clock_register(&priv->ptp_clock_ops,
+					     priv->device);
+	if (IS_ERR(priv->ptp_clock)) {
+		priv->ptp_clock = NULL;
+		pr_err("ptp_clock_register() failed on %s\n", priv->dev->name);
+	} else
+		pr_debug("Added PTP HW clock successfully on %s\n",
+			 priv->dev->name);
+
+	return 0;
+}
+
+/**
+ * stmmac_ptp_unregister
+ * @priv: driver private structure
+ * Description: this function will remove/unregister the ptp clock driver
+ * from the kernel.
+ */
+void stmmac_ptp_unregister(struct stmmac_priv *priv)
+{
+	if (priv->ptp_clock) {
+		ptp_clock_unregister(priv->ptp_clock);
+		pr_debug("Removed PTP HW clock successfully on %s\n",
+			 priv->dev->name);
+	}
+}