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

Pull networking changes from David S Miller:

 1) Remove the ipv4 routing cache.  Now lookups go directly into the FIB
    trie and use prebuilt routes cached there.

    No more garbage collection, no more rDOS attacks on the routing
    cache.  Instead we now get predictable and consistent performance,
    no matter what the pattern of traffic we service.

    This has been almost 2 years in the making.  Special thanks to
    Julian Anastasov, Eric Dumazet, Steffen Klassert, and others who
    have helped along the way.

    I'm sure that with a change of this magnitude there will be some
    kind of fallout, but such things ought the be simple to fix at this
    point.  Luckily I'm not European so I'll be around all of August to
    fix things :-)

    The major stages of this work here are each fronted by a forced
    merge commit whose commit message contains a top-level description
    of the motivations and implementation issues.

 2) Pre-demux of established ipv4 TCP sockets, saves a route demux on
    input.

 3) TCP SYN/ACK performance tweaks from Eric Dumazet.

 4) Add namespace support for netfilter L4 conntrack helpers, from Gao
    Feng.

 5) Add config mechanism for Energy Efficient Ethernet to ethtool, from
    Yuval Mintz.

 6) Remove quadratic behavior from /proc/net/unix, from Eric Dumazet.

 7) Support for connection tracker helpers in userspace, from Pablo
    Neira Ayuso.

 8) Allow userspace driven TX load balancing functions in TEAM driver,
    from Jiri Pirko.

 9) Kill off NLMSG_PUT and RTA_PUT macros, more gross stuff with
    embedded gotos.

10) TCP Small Queues, essentially minimize the amount of TCP data queued
    up in the packet scheduler layer.  Whereas the existing BQL (Byte
    Queue Limits) limits the pkt_sched --> netdevice queuing levels,
    this controls the TCP --> pkt_sched queueing levels.

    From Eric Dumazet.

11) Reduce the number of get_page/put_page ops done on SKB fragments,
    from Alexander Duyck.

12) Implement protection against blind resets in TCP (RFC 5961), from
    Eric Dumazet.

13) Support the client side of TCP Fast Open, basically the ability to
    send data in the SYN exchange, from Yuchung Cheng.

    Basically, the sender queues up data with a sendmsg() call using
    MSG_FASTOPEN, then they do the connect() which emits the queued up
    fastopen data.

14) Avoid all the problems we get into in TCP when timers or PMTU events
    hit a locked socket.  The TCP Small Queues changes added a
    tcp_release_cb() that allows us to queue work up to the
    release_sock() caller, and that's what we use here too.  From Eric
    Dumazet.

15) Zero copy on TX support for TUN driver, from Michael S. Tsirkin.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1870 commits)
  genetlink: define lockdep_genl_is_held() when CONFIG_LOCKDEP
  r8169: revert "add byte queue limit support".
  ipv4: Change rt->rt_iif encoding.
  net: Make skb->skb_iif always track skb->dev
  ipv4: Prepare for change of rt->rt_iif encoding.
  ipv4: Remove all RTCF_DIRECTSRC handliing.
  ipv4: Really ignore ICMP address requests/replies.
  decnet: Don't set RTCF_DIRECTSRC.
  net/ipv4/ip_vti.c: Fix __rcu warnings detected by sparse.
  ipv4: Remove redundant assignment
  rds: set correct msg_namelen
  openvswitch: potential NULL deref in sample()
  tcp: dont drop MTU reduction indications
  bnx2x: Add new 57840 device IDs
  tcp: avoid oops in tcp_metrics and reset tcpm_stamp
  niu: Change niu_rbr_fill() to use unlikely() to check niu_rbr_add_page() return value
  niu: Fix to check for dma mapping errors.
  net: Fix references to out-of-scope variables in put_cmsg_compat()
  net: ethernet: davinci_emac: add pm_runtime support
  net: ethernet: davinci_emac: Remove unnecessary #include
  ...

10 files changed, 391 insertions, 41 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h b/drivers/net/ethernet/stmicro/stmmac/common.h
index bcd54d6e94fd..e2d083228f3a 100644
--- a/drivers/net/ethernet/stmicro/stmmac/common.h
+++ b/drivers/net/ethernet/stmicro/stmmac/common.h
@@ -95,6 +95,16 @@ struct stmmac_extra_stats {
 	unsigned long poll_n;
 	unsigned long sched_timer_n;
 	unsigned long normal_irq_n;
+	unsigned long mmc_tx_irq_n;
+	unsigned long mmc_rx_irq_n;
+	unsigned long mmc_rx_csum_offload_irq_n;
+	/* EEE */
+	unsigned long irq_receive_pmt_irq_n;
+	unsigned long irq_tx_path_in_lpi_mode_n;
+	unsigned long irq_tx_path_exit_lpi_mode_n;
+	unsigned long irq_rx_path_in_lpi_mode_n;
+	unsigned long irq_rx_path_exit_lpi_mode_n;
+	unsigned long phy_eee_wakeup_error_n;
 };
 
 /* CSR Frequency Access Defines*/
@@ -162,6 +172,17 @@ enum tx_dma_irq_status {
 	handle_tx_rx = 3,
 };
 
+enum core_specific_irq_mask {
+	core_mmc_tx_irq = 1,
+	core_mmc_rx_irq = 2,
+	core_mmc_rx_csum_offload_irq = 4,
+	core_irq_receive_pmt_irq = 8,
+	core_irq_tx_path_in_lpi_mode = 16,
+	core_irq_tx_path_exit_lpi_mode = 32,
+	core_irq_rx_path_in_lpi_mode = 64,
+	core_irq_rx_path_exit_lpi_mode = 128,
+};
+
 /* DMA HW capabilities */
 struct dma_features {
 	unsigned int mbps_10_100;
@@ -208,6 +229,10 @@ struct dma_features {
 #define MAC_ENABLE_TX		0x00000008	/* Transmitter Enable */
 #define MAC_RNABLE_RX		0x00000004	/* Receiver Enable */
 
+/* Default LPI timers */
+#define STMMAC_DEFAULT_LIT_LS_TIMER	0x3E8
+#define STMMAC_DEFAULT_TWT_LS_TIMER	0x0
+
 struct stmmac_desc_ops {
 	/* DMA RX descriptor ring initialization */
 	void (*init_rx_desc) (struct dma_desc *p, unsigned int ring_size,
@@ -278,7 +303,7 @@ struct stmmac_ops {
 	/* Dump MAC registers */
 	void (*dump_regs) (void __iomem *ioaddr);
 	/* Handle extra events on specific interrupts hw dependent */
-	void (*host_irq_status) (void __iomem *ioaddr);
+	int (*host_irq_status) (void __iomem *ioaddr);
 	/* Multicast filter setting */
 	void (*set_filter) (struct net_device *dev, int id);
 	/* Flow control setting */
@@ -291,6 +316,10 @@ struct stmmac_ops {
 			       unsigned int reg_n);
 	void (*get_umac_addr) (void __iomem *ioaddr, unsigned char *addr,
 			       unsigned int reg_n);
+	void (*set_eee_mode) (void __iomem *ioaddr);
+	void (*reset_eee_mode) (void __iomem *ioaddr);
+	void (*set_eee_timer) (void __iomem *ioaddr, int ls, int tw);
+	void (*set_eee_pls) (void __iomem *ioaddr, int link);
 };
 
 struct mac_link {
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac1000.h b/drivers/net/ethernet/stmicro/stmmac/dwmac1000.h
index 23478bf4ed7a..f90fcb5f9573 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac1000.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac1000.h
@@ -36,6 +36,7 @@
 
 #define GMAC_INT_STATUS		0x00000038	/* interrupt status register */
 enum dwmac1000_irq_status {
+	lpiis_irq = 0x400,
 	time_stamp_irq = 0x0200,
 	mmc_rx_csum_offload_irq = 0x0080,
 	mmc_tx_irq = 0x0040,
@@ -60,6 +61,25 @@ enum power_event {
 	power_down = 0x00000001,
 };
 
+/* Energy Efficient Ethernet (EEE)
+ *
+ * LPI status, timer and control register offset
+ */
+#define LPI_CTRL_STATUS	0x0030
+#define LPI_TIMER_CTRL	0x0034
+
+/* LPI control and status defines */
+#define LPI_CTRL_STATUS_LPITXA	0x00080000	/* Enable LPI TX Automate */
+#define LPI_CTRL_STATUS_PLSEN	0x00040000	/* Enable PHY Link Status */
+#define LPI_CTRL_STATUS_PLS	0x00020000	/* PHY Link Status */
+#define LPI_CTRL_STATUS_LPIEN	0x00010000	/* LPI Enable */
+#define LPI_CTRL_STATUS_RLPIST	0x00000200	/* Receive LPI state */
+#define LPI_CTRL_STATUS_TLPIST	0x00000100	/* Transmit LPI state */
+#define LPI_CTRL_STATUS_RLPIEX	0x00000008	/* Receive LPI Exit */
+#define LPI_CTRL_STATUS_RLPIEN	0x00000004	/* Receive LPI Entry */
+#define LPI_CTRL_STATUS_TLPIEX	0x00000002	/* Transmit LPI Exit */
+#define LPI_CTRL_STATUS_TLPIEN	0x00000001	/* Transmit LPI Entry */
+
 /* GMAC HW ADDR regs */
 #define GMAC_ADDR_HIGH(reg)	(((reg > 15) ? 0x00000800 : 0x00000040) + \
 				(reg * 8))
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
index b5e4d02f15c9..bfe022605498 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
@@ -194,26 +194,107 @@ static void dwmac1000_pmt(void __iomem *ioaddr, unsigned long mode)
 }
 
 
-static void dwmac1000_irq_status(void __iomem *ioaddr)
+static int dwmac1000_irq_status(void __iomem *ioaddr)
 {
 	u32 intr_status = readl(ioaddr + GMAC_INT_STATUS);
+	int status = 0;
 
 	/* Not used events (e.g. MMC interrupts) are not handled. */
-	if ((intr_status & mmc_tx_irq))
-		CHIP_DBG(KERN_DEBUG "GMAC: MMC tx interrupt: 0x%08x\n",
+	if ((intr_status & mmc_tx_irq)) {
+		CHIP_DBG(KERN_INFO "GMAC: MMC tx interrupt: 0x%08x\n",
 		    readl(ioaddr + GMAC_MMC_TX_INTR));
-	if (unlikely(intr_status & mmc_rx_irq))
-		CHIP_DBG(KERN_DEBUG "GMAC: MMC rx interrupt: 0x%08x\n",
+		status |= core_mmc_tx_irq;
+	}
+	if (unlikely(intr_status & mmc_rx_irq)) {
+		CHIP_DBG(KERN_INFO "GMAC: MMC rx interrupt: 0x%08x\n",
 		    readl(ioaddr + GMAC_MMC_RX_INTR));
-	if (unlikely(intr_status & mmc_rx_csum_offload_irq))
-		CHIP_DBG(KERN_DEBUG "GMAC: MMC rx csum offload: 0x%08x\n",
+		status |= core_mmc_rx_irq;
+	}
+	if (unlikely(intr_status & mmc_rx_csum_offload_irq)) {
+		CHIP_DBG(KERN_INFO "GMAC: MMC rx csum offload: 0x%08x\n",
 		    readl(ioaddr + GMAC_MMC_RX_CSUM_OFFLOAD));
+		status |= core_mmc_rx_csum_offload_irq;
+	}
 	if (unlikely(intr_status & pmt_irq)) {
-		CHIP_DBG(KERN_DEBUG "GMAC: received Magic frame\n");
+		CHIP_DBG(KERN_INFO "GMAC: received Magic frame\n");
 		/* clear the PMT bits 5 and 6 by reading the PMT
 		 * status register. */
 		readl(ioaddr + GMAC_PMT);
+		status |= core_irq_receive_pmt_irq;
 	}
+	/* MAC trx/rx EEE LPI entry/exit interrupts */
+	if (intr_status & lpiis_irq) {
+		/* Clean LPI interrupt by reading the Reg 12 */
+		u32 lpi_status = readl(ioaddr + LPI_CTRL_STATUS);
+
+		if (lpi_status & LPI_CTRL_STATUS_TLPIEN) {
+			CHIP_DBG(KERN_INFO "GMAC TX entered in LPI\n");
+			status |= core_irq_tx_path_in_lpi_mode;
+		}
+		if (lpi_status & LPI_CTRL_STATUS_TLPIEX) {
+			CHIP_DBG(KERN_INFO "GMAC TX exit from LPI\n");
+			status |= core_irq_tx_path_exit_lpi_mode;
+		}
+		if (lpi_status & LPI_CTRL_STATUS_RLPIEN) {
+			CHIP_DBG(KERN_INFO "GMAC RX entered in LPI\n");
+			status |= core_irq_rx_path_in_lpi_mode;
+		}
+		if (lpi_status & LPI_CTRL_STATUS_RLPIEX) {
+			CHIP_DBG(KERN_INFO "GMAC RX exit from LPI\n");
+			status |= core_irq_rx_path_exit_lpi_mode;
+		}
+	}
+
+	return status;
+}
+
+static void  dwmac1000_set_eee_mode(void __iomem *ioaddr)
+{
+	u32 value;
+
+	/* Enable the link status receive on RGMII, SGMII ore SMII
+	 * receive path and instruct the transmit to enter in LPI
+	 * state. */
+	value = readl(ioaddr + LPI_CTRL_STATUS);
+	value |= LPI_CTRL_STATUS_LPIEN | LPI_CTRL_STATUS_LPITXA;
+	writel(value, ioaddr + LPI_CTRL_STATUS);
+}
+
+static void  dwmac1000_reset_eee_mode(void __iomem *ioaddr)
+{
+	u32 value;
+
+	value = readl(ioaddr + LPI_CTRL_STATUS);
+	value &= ~(LPI_CTRL_STATUS_LPIEN | LPI_CTRL_STATUS_LPITXA);
+	writel(value, ioaddr + LPI_CTRL_STATUS);
+}
+
+static void  dwmac1000_set_eee_pls(void __iomem *ioaddr, int link)
+{
+	u32 value;
+
+	value = readl(ioaddr + LPI_CTRL_STATUS);
+
+	if (link)
+		value |= LPI_CTRL_STATUS_PLS;
+	else
+		value &= ~LPI_CTRL_STATUS_PLS;
+
+	writel(value, ioaddr + LPI_CTRL_STATUS);
+}
+
+static void  dwmac1000_set_eee_timer(void __iomem *ioaddr, int ls, int tw)
+{
+	int value = ((tw & 0xffff)) | ((ls & 0x7ff) << 16);
+
+	/* Program the timers in the LPI timer control register:
+	 * LS: minimum time (ms) for which the link
+	 *  status from PHY should be ok before transmitting
+	 *  the LPI pattern.
+	 * TW: minimum time (us) for which the core waits
+	 *  after it has stopped transmitting the LPI pattern.
+	 */
+	writel(value, ioaddr + LPI_TIMER_CTRL);
 }
 
 static const struct stmmac_ops dwmac1000_ops = {
@@ -226,6 +307,10 @@ static const struct stmmac_ops dwmac1000_ops = {
 	.pmt = dwmac1000_pmt,
 	.set_umac_addr = dwmac1000_set_umac_addr,
 	.get_umac_addr = dwmac1000_get_umac_addr,
+	.set_eee_mode =  dwmac1000_set_eee_mode,
+	.reset_eee_mode =  dwmac1000_reset_eee_mode,
+	.set_eee_timer =  dwmac1000_set_eee_timer,
+	.set_eee_pls =  dwmac1000_set_eee_pls,
 };
 
 struct mac_device_info *dwmac1000_setup(void __iomem *ioaddr)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac100_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac100_core.c
index 19e0f4eed2bc..f83210e7c221 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac100_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac100_core.c
@@ -72,9 +72,9 @@ static int dwmac100_rx_ipc_enable(void __iomem *ioaddr)
 	return 0;
 }
 
-static void dwmac100_irq_status(void __iomem *ioaddr)
+static int dwmac100_irq_status(void __iomem *ioaddr)
 {
-	return;
+	return 0;
 }
 
 static void dwmac100_set_umac_addr(void __iomem *ioaddr, unsigned char *addr,
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h b/drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h
index 6e0360f9cfde..e678ce39d014 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h
@@ -70,6 +70,7 @@
 #define DMA_INTR_DEFAULT_MASK	(DMA_INTR_NORMAL | DMA_INTR_ABNORMAL)
 
 /* DMA Status register defines */
+#define DMA_STATUS_GLPII	0x40000000	/* GMAC LPI interrupt */
 #define DMA_STATUS_GPI		0x10000000	/* PMT interrupt */
 #define DMA_STATUS_GMI		0x08000000	/* MMC interrupt */
 #define DMA_STATUS_GLI		0x04000000	/* GMAC Line interface int */
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
index dc20c56efc9d..ab4c376cb276 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
@@ -87,6 +87,12 @@ struct stmmac_priv {
 #endif
 	int clk_csr;
 	int synopsys_id;
+	struct timer_list eee_ctrl_timer;
+	bool tx_path_in_lpi_mode;
+	int lpi_irq;
+	int eee_enabled;
+	int eee_active;
+	int tx_lpi_timer;
 };
 
 extern int phyaddr;
@@ -104,6 +110,8 @@ int stmmac_dvr_remove(struct net_device *ndev);
 struct stmmac_priv *stmmac_dvr_probe(struct device *device,
 				     struct plat_stmmacenet_data *plat_dat,
 				     void __iomem *addr);
+void stmmac_disable_eee_mode(struct stmmac_priv *priv);
+bool stmmac_eee_init(struct stmmac_priv *priv);
 
 #ifdef CONFIG_HAVE_CLK
 static inline int stmmac_clk_enable(struct stmmac_priv *priv)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
index ce431846fc6f..76fd61aa005f 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
@@ -93,6 +93,16 @@ static const struct stmmac_stats stmmac_gstrings_stats[] = {
 	STMMAC_STAT(poll_n),
 	STMMAC_STAT(sched_timer_n),
 	STMMAC_STAT(normal_irq_n),
+	STMMAC_STAT(normal_irq_n),
+	STMMAC_STAT(mmc_tx_irq_n),
+	STMMAC_STAT(mmc_rx_irq_n),
+	STMMAC_STAT(mmc_rx_csum_offload_irq_n),
+	STMMAC_STAT(irq_receive_pmt_irq_n),
+	STMMAC_STAT(irq_tx_path_in_lpi_mode_n),
+	STMMAC_STAT(irq_tx_path_exit_lpi_mode_n),
+	STMMAC_STAT(irq_rx_path_in_lpi_mode_n),
+	STMMAC_STAT(irq_rx_path_exit_lpi_mode_n),
+	STMMAC_STAT(phy_eee_wakeup_error_n),
 };
 #define STMMAC_STATS_LEN ARRAY_SIZE(stmmac_gstrings_stats)
 
@@ -366,6 +376,11 @@ static void stmmac_get_ethtool_stats(struct net_device *dev,
 					     (*(u32 *)p);
 			}
 		}
+		if (priv->eee_enabled) {
+			int val = phy_get_eee_err(priv->phydev);
+			if (val)
+				priv->xstats.phy_eee_wakeup_error_n = val;
+		}
 	}
 	for (i = 0; i < STMMAC_STATS_LEN; i++) {
 		char *p = (char *)priv + stmmac_gstrings_stats[i].stat_offset;
@@ -464,6 +479,46 @@ static int stmmac_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
 	return 0;
 }
 
+static int stmmac_ethtool_op_get_eee(struct net_device *dev,
+				     struct ethtool_eee *edata)
+{
+	struct stmmac_priv *priv = netdev_priv(dev);
+
+	if (!priv->dma_cap.eee)
+		return -EOPNOTSUPP;
+
+	edata->eee_enabled = priv->eee_enabled;
+	edata->eee_active = priv->eee_active;
+	edata->tx_lpi_timer = priv->tx_lpi_timer;
+
+	return phy_ethtool_get_eee(priv->phydev, edata);
+}
+
+static int stmmac_ethtool_op_set_eee(struct net_device *dev,
+				     struct ethtool_eee *edata)
+{
+	struct stmmac_priv *priv = netdev_priv(dev);
+
+	priv->eee_enabled = edata->eee_enabled;
+
+	if (!priv->eee_enabled)
+		stmmac_disable_eee_mode(priv);
+	else {
+		/* We are asking for enabling the EEE but it is safe
+		 * to verify all by invoking the eee_init function.
+		 * In case of failure it will return an error.
+		 */
+		priv->eee_enabled = stmmac_eee_init(priv);
+		if (!priv->eee_enabled)
+			return -EOPNOTSUPP;
+
+		/* Do not change tx_lpi_timer in case of failure */
+		priv->tx_lpi_timer = edata->tx_lpi_timer;
+	}
+
+	return phy_ethtool_set_eee(priv->phydev, edata);
+}
+
 static const struct ethtool_ops stmmac_ethtool_ops = {
 	.begin = stmmac_check_if_running,
 	.get_drvinfo = stmmac_ethtool_getdrvinfo,
@@ -480,6 +535,8 @@ static const struct ethtool_ops stmmac_ethtool_ops = {
 	.get_strings = stmmac_get_strings,
 	.get_wol = stmmac_get_wol,
 	.set_wol = stmmac_set_wol,
+	.get_eee = stmmac_ethtool_op_get_eee,
+	.set_eee = stmmac_ethtool_op_set_eee,
 	.get_sset_count	= stmmac_get_sset_count,
 	.get_ts_info = ethtool_op_get_ts_info,
 };
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index ea3003edde18..f6b04c1a3672 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -133,6 +133,12 @@ static const u32 default_msg_level = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
 				      NETIF_MSG_LINK | NETIF_MSG_IFUP |
 				      NETIF_MSG_IFDOWN | NETIF_MSG_TIMER);
 
+#define STMMAC_DEFAULT_LPI_TIMER	1000
+static int eee_timer = STMMAC_DEFAULT_LPI_TIMER;
+module_param(eee_timer, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(eee_timer, "LPI tx expiration time in msec");
+#define STMMAC_LPI_TIMER(x) (jiffies + msecs_to_jiffies(x))
+
 static irqreturn_t stmmac_interrupt(int irq, void *dev_id);
 
 #ifdef CONFIG_STMMAC_DEBUG_FS
@@ -161,6 +167,8 @@ static void stmmac_verify_args(void)
 		flow_ctrl = FLOW_OFF;
 	if (unlikely((pause < 0) || (pause > 0xffff)))
 		pause = PAUSE_TIME;
+	if (eee_timer < 0)
+		eee_timer = STMMAC_DEFAULT_LPI_TIMER;
 }
 
 static void stmmac_clk_csr_set(struct stmmac_priv *priv)
@@ -229,6 +237,85 @@ static inline void stmmac_hw_fix_mac_speed(struct stmmac_priv *priv)
 					  phydev->speed);
 }
 
+static void stmmac_enable_eee_mode(struct stmmac_priv *priv)
+{
+	/* Check and enter in LPI mode */
+	if ((priv->dirty_tx == priv->cur_tx) &&
+	    (priv->tx_path_in_lpi_mode == false))
+		priv->hw->mac->set_eee_mode(priv->ioaddr);
+}
+
+void stmmac_disable_eee_mode(struct stmmac_priv *priv)
+{
+	/* Exit and disable EEE in case of we are are in LPI state. */
+	priv->hw->mac->reset_eee_mode(priv->ioaddr);
+	del_timer_sync(&priv->eee_ctrl_timer);
+	priv->tx_path_in_lpi_mode = false;
+}
+
+/**
+ * stmmac_eee_ctrl_timer
+ * @arg : data hook
+ * Description:
+ *  If there is no data transfer and if we are not in LPI state,
+ *  then MAC Transmitter can be moved to LPI state.
+ */
+static void stmmac_eee_ctrl_timer(unsigned long arg)
+{
+	struct stmmac_priv *priv = (struct stmmac_priv *)arg;
+
+	stmmac_enable_eee_mode(priv);
+	mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_TIMER(eee_timer));
+}
+
+/**
+ * stmmac_eee_init
+ * @priv: private device pointer
+ * Description:
+ *  If the EEE support has been enabled while configuring the driver,
+ *  if the GMAC actually supports the EEE (from the HW cap reg) and the
+ *  phy can also manage EEE, so enable the LPI state and start the timer
+ *  to verify if the tx path can enter in LPI state.
+ */
+bool stmmac_eee_init(struct stmmac_priv *priv)
+{
+	bool ret = false;
+
+	/* MAC core supports the EEE feature. */
+	if (priv->dma_cap.eee) {
+		/* Check if the PHY supports EEE */
+		if (phy_init_eee(priv->phydev, 1))
+			goto out;
+
+		priv->eee_active = 1;
+		init_timer(&priv->eee_ctrl_timer);
+		priv->eee_ctrl_timer.function = stmmac_eee_ctrl_timer;
+		priv->eee_ctrl_timer.data = (unsigned long)priv;
+		priv->eee_ctrl_timer.expires = STMMAC_LPI_TIMER(eee_timer);
+		add_timer(&priv->eee_ctrl_timer);
+
+		priv->hw->mac->set_eee_timer(priv->ioaddr,
+					     STMMAC_DEFAULT_LIT_LS_TIMER,
+					     priv->tx_lpi_timer);
+
+		pr_info("stmmac: Energy-Efficient Ethernet initialized\n");
+
+		ret = true;
+	}
+out:
+	return ret;
+}
+
+static void stmmac_eee_adjust(struct stmmac_priv *priv)
+{
+	/* When the EEE has been already initialised we have to
+	 * modify the PLS bit in the LPI ctrl & status reg according
+	 * to the PHY link status. For this reason.
+	 */
+	if (priv->eee_enabled)
+		priv->hw->mac->set_eee_pls(priv->ioaddr, priv->phydev->link);
+}
+
 /**
  * stmmac_adjust_link
  * @dev: net device structure
@@ -249,6 +336,7 @@ static void stmmac_adjust_link(struct net_device *dev)
 	    phydev->addr, phydev->link);
 
 	spin_lock_irqsave(&priv->lock, flags);
+
 	if (phydev->link) {
 		u32 ctrl = readl(priv->ioaddr + MAC_CTRL_REG);
 
@@ -315,6 +403,8 @@ static void stmmac_adjust_link(struct net_device *dev)
 	if (new_state && netif_msg_link(priv))
 		phy_print_status(phydev);
 
+	stmmac_eee_adjust(priv);
+
 	spin_unlock_irqrestore(&priv->lock, flags);
 
 	DBG(probe, DEBUG, "stmmac_adjust_link: exiting\n");
@@ -332,7 +422,7 @@ static int stmmac_init_phy(struct net_device *dev)
 {
 	struct stmmac_priv *priv = netdev_priv(dev);
 	struct phy_device *phydev;
-	char phy_id[MII_BUS_ID_SIZE + 3];
+	char phy_id_fmt[MII_BUS_ID_SIZE + 3];
 	char bus_id[MII_BUS_ID_SIZE];
 	int interface = priv->plat->interface;
 	priv->oldlink = 0;
@@ -346,11 +436,12 @@ static int stmmac_init_phy(struct net_device *dev)
 		snprintf(bus_id, MII_BUS_ID_SIZE, "stmmac-%x",
 				priv->plat->bus_id);
 
-	snprintf(phy_id, MII_BUS_ID_SIZE + 3, PHY_ID_FMT, bus_id,
+	snprintf(phy_id_fmt, MII_BUS_ID_SIZE + 3, PHY_ID_FMT, bus_id,
 		 priv->plat->phy_addr);
-	pr_debug("stmmac_init_phy:  trying to attach to %s\n", phy_id);
+	pr_debug("stmmac_init_phy:  trying to attach to %s\n", phy_id_fmt);
 
-	phydev = phy_connect(dev, phy_id, &stmmac_adjust_link, 0, interface);
+	phydev = phy_connect(dev, phy_id_fmt, &stmmac_adjust_link, 0,
+			     interface);
 
 	if (IS_ERR(phydev)) {
 		pr_err("%s: Could not attach to PHY\n", dev->name);
@@ -677,7 +768,7 @@ static void stmmac_tx(struct stmmac_priv *priv)
 
 		priv->hw->desc->release_tx_desc(p);
 
-		entry = (++priv->dirty_tx) % txsize;
+		priv->dirty_tx++;
 	}
 	if (unlikely(netif_queue_stopped(priv->dev) &&
 		     stmmac_tx_avail(priv) > STMMAC_TX_THRESH(priv))) {
@@ -689,6 +780,11 @@ static void stmmac_tx(struct stmmac_priv *priv)
 		}
 		netif_tx_unlock(priv->dev);
 	}
+
+	if ((priv->eee_enabled) && (!priv->tx_path_in_lpi_mode)) {
+		stmmac_enable_eee_mode(priv);
+		mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_TIMER(eee_timer));
+	}
 	spin_unlock(&priv->tx_lock);
 }
 
@@ -1027,6 +1123,17 @@ static int stmmac_open(struct net_device *dev)
 		}
 	}
 
+	/* Request the IRQ lines */
+	if (priv->lpi_irq != -ENXIO) {
+		ret = request_irq(priv->lpi_irq, stmmac_interrupt, IRQF_SHARED,
+				  dev->name, dev);
+		if (unlikely(ret < 0)) {
+			pr_err("%s: ERROR: allocating the LPI IRQ %d (%d)\n",
+			       __func__, priv->lpi_irq, ret);
+			goto open_error_lpiirq;
+		}
+	}
+
 	/* Enable the MAC Rx/Tx */
 	stmmac_set_mac(priv->ioaddr, true);
 
@@ -1062,12 +1169,19 @@ static int stmmac_open(struct net_device *dev)
 	if (priv->phydev)
 		phy_start(priv->phydev);
 
+	priv->tx_lpi_timer = STMMAC_DEFAULT_TWT_LS_TIMER;
+	priv->eee_enabled = stmmac_eee_init(priv);
+
 	napi_enable(&priv->napi);
 	skb_queue_head_init(&priv->rx_recycle);
 	netif_start_queue(dev);
 
 	return 0;
 
+open_error_lpiirq:
+	if (priv->wol_irq != dev->irq)
+		free_irq(priv->wol_irq, dev);
+
 open_error_wolirq:
 	free_irq(dev->irq, dev);
 
@@ -1093,6 +1207,9 @@ static int stmmac_release(struct net_device *dev)
 {
 	struct stmmac_priv *priv = netdev_priv(dev);
 
+	if (priv->eee_enabled)
+		del_timer_sync(&priv->eee_ctrl_timer);
+
 	/* Stop and disconnect the PHY */
 	if (priv->phydev) {
 		phy_stop(priv->phydev);
@@ -1115,6 +1232,8 @@ static int stmmac_release(struct net_device *dev)
 	free_irq(dev->irq, dev);
 	if (priv->wol_irq != dev->irq)
 		free_irq(priv->wol_irq, dev);
+	if (priv->lpi_irq != -ENXIO)
+		free_irq(priv->lpi_irq, dev);
 
 	/* Stop TX/RX DMA and clear the descriptors */
 	priv->hw->dma->stop_tx(priv->ioaddr);
@@ -1164,6 +1283,9 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	spin_lock(&priv->tx_lock);
 
+	if (priv->tx_path_in_lpi_mode)
+		stmmac_disable_eee_mode(priv);
+
 	entry = priv->cur_tx % txsize;
 
 #ifdef STMMAC_XMIT_DEBUG
@@ -1311,7 +1433,6 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit)
 		display_ring(priv->dma_rx, rxsize);
 	}
 #endif
-	count = 0;
 	while (!priv->hw->desc->get_rx_owner(p)) {
 		int status;
 
@@ -1544,10 +1665,37 @@ static irqreturn_t stmmac_interrupt(int irq, void *dev_id)
 		return IRQ_NONE;
 	}
 
-	if (priv->plat->has_gmac)
-		/* To handle GMAC own interrupts */
-		priv->hw->mac->host_irq_status((void __iomem *) dev->base_addr);
+	/* To handle GMAC own interrupts */
+	if (priv->plat->has_gmac) {
+		int status = priv->hw->mac->host_irq_status((void __iomem *)
+							    dev->base_addr);
+		if (unlikely(status)) {
+			if (status & core_mmc_tx_irq)
+				priv->xstats.mmc_tx_irq_n++;
+			if (status & core_mmc_rx_irq)
+				priv->xstats.mmc_rx_irq_n++;
+			if (status & core_mmc_rx_csum_offload_irq)
+				priv->xstats.mmc_rx_csum_offload_irq_n++;
+			if (status & core_irq_receive_pmt_irq)
+				priv->xstats.irq_receive_pmt_irq_n++;
+
+			/* For LPI we need to save the tx status */
+			if (status & core_irq_tx_path_in_lpi_mode) {
+				priv->xstats.irq_tx_path_in_lpi_mode_n++;
+				priv->tx_path_in_lpi_mode = true;
+			}
+			if (status & core_irq_tx_path_exit_lpi_mode) {
+				priv->xstats.irq_tx_path_exit_lpi_mode_n++;
+				priv->tx_path_in_lpi_mode = false;
+			}
+			if (status & core_irq_rx_path_in_lpi_mode)
+				priv->xstats.irq_rx_path_in_lpi_mode_n++;
+			if (status & core_irq_rx_path_exit_lpi_mode)
+				priv->xstats.irq_rx_path_exit_lpi_mode_n++;
+		}
+	}
 
+	/* To handle DMA interrupts */
 	stmmac_dma_interrupt(priv);
 
 	return IRQ_HANDLED;
@@ -2133,42 +2281,38 @@ static int __init stmmac_cmdline_opt(char *str)
 		return -EINVAL;
 	while ((opt = strsep(&str, ",")) != NULL) {
 		if (!strncmp(opt, "debug:", 6)) {
-			if (strict_strtoul(opt + 6, 0, (unsigned long *)&debug))
+			if (kstrtoint(opt + 6, 0, &debug))
 				goto err;
 		} else if (!strncmp(opt, "phyaddr:", 8)) {
-			if (strict_strtoul(opt + 8, 0,
-					   (unsigned long *)&phyaddr))
+			if (kstrtoint(opt + 8, 0, &phyaddr))
 				goto err;
 		} else if (!strncmp(opt, "dma_txsize:", 11)) {
-			if (strict_strtoul(opt + 11, 0,
-					   (unsigned long *)&dma_txsize))
+			if (kstrtoint(opt + 11, 0, &dma_txsize))
 				goto err;
 		} else if (!strncmp(opt, "dma_rxsize:", 11)) {
-			if (strict_strtoul(opt + 11, 0,
-					   (unsigned long *)&dma_rxsize))
+			if (kstrtoint(opt + 11, 0, &dma_rxsize))
 				goto err;
 		} else if (!strncmp(opt, "buf_sz:", 7)) {
-			if (strict_strtoul(opt + 7, 0,
-					   (unsigned long *)&buf_sz))
+			if (kstrtoint(opt + 7, 0, &buf_sz))
 				goto err;
 		} else if (!strncmp(opt, "tc:", 3)) {
-			if (strict_strtoul(opt + 3, 0, (unsigned long *)&tc))
+			if (kstrtoint(opt + 3, 0, &tc))
 				goto err;
 		} else if (!strncmp(opt, "watchdog:", 9)) {
-			if (strict_strtoul(opt + 9, 0,
-					   (unsigned long *)&watchdog))
+			if (kstrtoint(opt + 9, 0, &watchdog))
 				goto err;
 		} else if (!strncmp(opt, "flow_ctrl:", 10)) {
-			if (strict_strtoul(opt + 10, 0,
-					   (unsigned long *)&flow_ctrl))
+			if (kstrtoint(opt + 10, 0, &flow_ctrl))
 				goto err;
 		} else if (!strncmp(opt, "pause:", 6)) {
-			if (strict_strtoul(opt + 6, 0, (unsigned long *)&pause))
+			if (kstrtoint(opt + 6, 0, &pause))
+				goto err;
+		} else if (!strncmp(opt, "eee_timer:", 6)) {
+			if (kstrtoint(opt + 10, 0, &eee_timer))
 				goto err;
 #ifdef CONFIG_STMMAC_TIMER
 		} else if (!strncmp(opt, "tmrate:", 7)) {
-			if (strict_strtoul(opt + 7, 0,
-					   (unsigned long *)&tmrate))
+			if (kstrtoint(opt + 7, 0, &tmrate))
 				goto err;
 #endif
 		}
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
index cf826e6b6aa1..13afb8edfadc 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
@@ -125,7 +125,7 @@ err_out_req_reg_failed:
 }
 
 /**
- * stmmac_dvr_remove
+ * stmmac_pci_remove
  *
  * @pdev: platform device pointer
  * Description: this function calls the main to free the net resources
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 680d2b8dfe27..cd01ee7ecef1 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -49,7 +49,9 @@ static int __devinit stmmac_probe_config_dt(struct platform_device *pdev,
 	 * are provided. All other properties should be added
 	 * once needed on other platforms.
 	 */
-	if (of_device_is_compatible(np, "st,spear600-gmac")) {
+	if (of_device_is_compatible(np, "st,spear600-gmac") ||
+		of_device_is_compatible(np, "snps,dwmac-3.70a") ||
+		of_device_is_compatible(np, "snps,dwmac")) {
 		plat->has_gmac = 1;
 		plat->pmt = 1;
 	}
@@ -156,6 +158,8 @@ static int stmmac_pltfr_probe(struct platform_device *pdev)
 	if (priv->wol_irq == -ENXIO)
 		priv->wol_irq = priv->dev->irq;
 
+	priv->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi");
+
 	platform_set_drvdata(pdev, priv->dev);
 
 	pr_debug("STMMAC platform driver registration completed");
@@ -190,7 +194,7 @@ static int stmmac_pltfr_remove(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, NULL);
 
-	iounmap((void *)priv->ioaddr);
+	iounmap((void __force __iomem *)priv->ioaddr);
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	release_mem_region(res->start, resource_size(res));
 
@@ -250,7 +254,9 @@ static const struct dev_pm_ops stmmac_pltfr_pm_ops;
 #endif /* CONFIG_PM */
 
 static const struct of_device_id stmmac_dt_ids[] = {
-	{ .compatible = "st,spear600-gmac", },
+	{ .compatible = "st,spear600-gmac"},
+	{ .compatible = "snps,dwmac-3.70a"},
+	{ .compatible = "snps,dwmac"},
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, stmmac_dt_ids);