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  bridge: Update outdated comment on promiscuous mode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, 57 insertions, 21 deletions

diff --git a/drivers/net/wireless/rtl818x/rtl8180/dev.c b/drivers/net/wireless/rtl818x/rtl8180/dev.c
index 2c1c02b..4b904f70 100644
--- a/drivers/net/wireless/rtl818x/rtl8180/dev.c
+++ b/drivers/net/wireless/rtl818x/rtl8180/dev.c
@@ -16,6 +16,7 @@
  *
  * based also on:
  *  - portions of rtl8187se Linux staging driver, Copyright Realtek corp.
+ *    (available in drivers/staging/rtl8187se directory of Linux 3.14)
  *  - other GPL, unpublished (until now), Linux driver code,
  *    Copyright Larry Finger <Larry.Finger@lwfinger.net>
  *
@@ -209,7 +210,7 @@ static void rtl8180_handle_rx(struct ieee80211_hw *dev)
 	struct rtl8180_priv *priv = dev->priv;
 	struct rtl818x_rx_cmd_desc *cmd_desc;
 	unsigned int count = 32;
-	u8 signal, agc, sq;
+	u8 agc, sq, signal = 1;
 	dma_addr_t mapping;
 
 	while (count--) {
@@ -222,12 +223,20 @@ static void rtl8180_handle_rx(struct ieee80211_hw *dev)
 			struct rtl8187se_rx_desc *desc = entry;
 
 			flags = le32_to_cpu(desc->flags);
+			/* if ownership flag is set, then we can trust the
+			 * HW has written other fields. We must not trust
+			 * other descriptor data read before we checked (read)
+			 * the ownership flag
+			 */
+			rmb();
 			flags2 = le32_to_cpu(desc->flags2);
 			tsft = le64_to_cpu(desc->tsft);
 		} else {
 			struct rtl8180_rx_desc *desc = entry;
 
 			flags = le32_to_cpu(desc->flags);
+			/* same as above */
+			rmb();
 			flags2 = le32_to_cpu(desc->flags2);
 			tsft = le64_to_cpu(desc->tsft);
 		}
@@ -266,18 +275,21 @@ static void rtl8180_handle_rx(struct ieee80211_hw *dev)
 			rx_status.rate_idx = (flags >> 20) & 0xF;
 			agc = (flags2 >> 17) & 0x7F;
 
-			if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8185) {
+			switch (priv->chip_family) {
+			case RTL818X_CHIP_FAMILY_RTL8185:
 				if (rx_status.rate_idx > 3)
-					signal = 90 - clamp_t(u8, agc, 25, 90);
+					signal = -clamp_t(u8, agc, 25, 90) - 9;
 				else
-					signal = 95 - clamp_t(u8, agc, 30, 95);
-			} else if (priv->chip_family ==
-				   RTL818X_CHIP_FAMILY_RTL8180) {
+					signal = -clamp_t(u8, agc, 30, 95);
+				break;
+			case RTL818X_CHIP_FAMILY_RTL8180:
 				sq = flags2 & 0xff;
 				signal = priv->rf->calc_rssi(agc, sq);
-			} else {
+				break;
+			case RTL818X_CHIP_FAMILY_RTL8187SE:
 				/* TODO: rtl8187se rssi */
 				signal = 10;
+				break;
 			}
 			rx_status.signal = signal;
 			rx_status.freq = dev->conf.chandef.chan->center_freq;
@@ -336,7 +348,6 @@ static void rtl8180_handle_tx(struct ieee80211_hw *dev, unsigned int prio)
 			info->flags |= IEEE80211_TX_STAT_ACK;
 
 		info->status.rates[0].count = (flags & 0xFF) + 1;
-		info->status.rates[1].idx = -1;
 
 		ieee80211_tx_status_irqsafe(dev, skb);
 		if (ring->entries - skb_queue_len(&ring->queue) == 2)
@@ -528,9 +539,7 @@ static void rtl8180_tx(struct ieee80211_hw *dev,
 	entry->plcp_len = cpu_to_le16(plcp_len);
 	entry->tx_buf = cpu_to_le32(mapping);
 
-	entry->flags2 = info->control.rates[1].idx >= 0 ?
-		ieee80211_get_alt_retry_rate(dev, info, 0)->bitrate << 4 : 0;
-	entry->retry_limit = info->control.rates[0].count;
+	entry->retry_limit = info->control.rates[0].count - 1;
 
 	/* We must be sure that tx_flags is written last because the HW
 	 * looks at it to check if the rest of data is valid or not
@@ -852,7 +861,7 @@ static int rtl8180_init_hw(struct ieee80211_hw *dev)
 
 	if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180) {
 		rtl818x_iowrite8(priv, &priv->map->WPA_CONF, 0);
-		rtl818x_iowrite8(priv, &priv->map->RATE_FALLBACK, 0x81);
+		rtl818x_iowrite8(priv, &priv->map->RATE_FALLBACK, 0);
 	} else {
 		rtl818x_iowrite8(priv, &priv->map->SECURITY, 0);
 
@@ -868,6 +877,16 @@ static int rtl8180_init_hw(struct ieee80211_hw *dev)
 		reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
 		rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg | (1 << 2));
 		rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
+		/* fix eccessive IFS after CTS-to-self */
+		if (priv->map_pio) {
+			u8 reg;
+
+			reg = rtl818x_ioread8(priv, &priv->map->PGSELECT);
+			rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg | 1);
+			rtl818x_iowrite8(priv, REG_ADDR1(0xff), 0x35);
+			rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
+		} else
+			rtl818x_iowrite8(priv, REG_ADDR1(0x1ff), 0x35);
 	}
 
 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
@@ -1450,9 +1469,10 @@ static void rtl8180_bss_info_changed(struct ieee80211_hw *dev,
 	vif_priv = (struct rtl8180_vif *)&vif->drv_priv;
 
 	if (changed & BSS_CHANGED_BSSID) {
-		for (i = 0; i < ETH_ALEN; i++)
-			rtl818x_iowrite8(priv, &priv->map->BSSID[i],
-					 info->bssid[i]);
+		rtl818x_iowrite16(priv, (__le16 __iomem *)&priv->map->BSSID[0],
+				  le16_to_cpu(*(__le16 *)info->bssid));
+		rtl818x_iowrite32(priv, (__le32 __iomem *)&priv->map->BSSID[2],
+				  le32_to_cpu(*(__le32 *)(info->bssid + 2)));
 
 		if (is_valid_ether_addr(info->bssid)) {
 			if (vif->type == NL80211_IFTYPE_ADHOC)
@@ -1723,17 +1743,20 @@ static int rtl8180_probe(struct pci_dev *pdev,
 	priv = dev->priv;
 	priv->pdev = pdev;
 
-	dev->max_rates = 2;
+	dev->max_rates = 1;
 	SET_IEEE80211_DEV(dev, &pdev->dev);
 	pci_set_drvdata(pdev, dev);
 
+	priv->map_pio = false;
 	priv->map = pci_iomap(pdev, 1, mem_len);
-	if (!priv->map)
+	if (!priv->map) {
 		priv->map = pci_iomap(pdev, 0, io_len);
+		priv->map_pio = true;
+	}
 
 	if (!priv->map) {
-		printk(KERN_ERR "%s (rtl8180): Cannot map device memory\n",
-		       pci_name(pdev));
+		dev_err(&pdev->dev, "Cannot map device memory/PIO\n");
+		err = -ENOMEM;
 		goto err_free_dev;
 	}
 
@@ -1751,8 +1774,7 @@ static int rtl8180_probe(struct pci_dev *pdev,
 	dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band;
 
 	dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
-		     IEEE80211_HW_RX_INCLUDES_FCS |
-		     IEEE80211_HW_SIGNAL_UNSPEC;
+		IEEE80211_HW_RX_INCLUDES_FCS;
 	dev->vif_data_size = sizeof(struct rtl8180_vif);
 	dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 					BIT(NL80211_IFTYPE_ADHOC);
@@ -1783,12 +1805,19 @@ static int rtl8180_probe(struct pci_dev *pdev,
 
 	case RTL818X_TX_CONF_RTL8187SE:
 		chip_name = "RTL8187SE";
+		if (priv->map_pio) {
+			dev_err(&pdev->dev,
+				"MMIO failed. PIO not supported on RTL8187SE\n");
+			err = -ENOMEM;
+			goto err_iounmap;
+		}
 		priv->chip_family = RTL818X_CHIP_FAMILY_RTL8187SE;
 		break;
 
 	default:
 		printk(KERN_ERR "%s (rtl8180): Unknown chip! (0x%x)\n",
 		       pci_name(pdev), reg >> 25);
+		err = -ENODEV;
 		goto err_iounmap;
 	}
 
@@ -1809,6 +1838,11 @@ static int rtl8180_probe(struct pci_dev *pdev,
 		pci_try_set_mwi(pdev);
 	}
 
+	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8185)
+		dev->flags |= IEEE80211_HW_SIGNAL_DBM;
+	else
+		dev->flags |= IEEE80211_HW_SIGNAL_UNSPEC;
+
 	rtl8180_eeprom_read(priv);
 
 	switch (priv->rf_type) {
@@ -1834,12 +1868,14 @@ static int rtl8180_probe(struct pci_dev *pdev,
 	default:
 		printk(KERN_ERR "%s (rtl8180): Unknown RF! (0x%x)\n",
 		       pci_name(pdev), priv->rf_type);
+		err = -ENODEV;
 		goto err_iounmap;
 	}
 
 	if (!priv->rf) {
 		printk(KERN_ERR "%s (rtl8180): %s RF frontend not supported!\n",
 		       pci_name(pdev), rf_name);
+		err = -ENODEV;
 		goto err_iounmap;
 	}