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, 114 insertions, 42 deletions

diff --git a/drivers/net/ethernet/intel/igb/e1000_i210.c b/drivers/net/ethernet/intel/igb/e1000_i210.c
index 6a42344f24f1..ddb3cf51b9b9 100644
--- a/drivers/net/ethernet/intel/igb/e1000_i210.c
+++ b/drivers/net/ethernet/intel/igb/e1000_i210.c
@@ -44,10 +44,42 @@
 static s32 igb_get_hw_semaphore_i210(struct e1000_hw *hw)
 {
 	u32 swsm;
-	s32 ret_val = E1000_SUCCESS;
 	s32 timeout = hw->nvm.word_size + 1;
 	s32 i = 0;
 
+	/* Get the SW semaphore */
+	while (i < timeout) {
+		swsm = rd32(E1000_SWSM);
+		if (!(swsm & E1000_SWSM_SMBI))
+			break;
+
+		udelay(50);
+		i++;
+	}
+
+	if (i == timeout) {
+		/* In rare circumstances, the SW semaphore may already be held
+		 * unintentionally. Clear the semaphore once before giving up.
+		 */
+		if (hw->dev_spec._82575.clear_semaphore_once) {
+			hw->dev_spec._82575.clear_semaphore_once = false;
+			igb_put_hw_semaphore(hw);
+			for (i = 0; i < timeout; i++) {
+				swsm = rd32(E1000_SWSM);
+				if (!(swsm & E1000_SWSM_SMBI))
+					break;
+
+				udelay(50);
+			}
+		}
+
+		/* If we do not have the semaphore here, we have to give up. */
+		if (i == timeout) {
+			hw_dbg("Driver can't access device - SMBI bit is set.\n");
+			return -E1000_ERR_NVM;
+		}
+	}
+
 	/* Get the FW semaphore. */
 	for (i = 0; i < timeout; i++) {
 		swsm = rd32(E1000_SWSM);
@@ -64,12 +96,10 @@ static s32 igb_get_hw_semaphore_i210(struct e1000_hw *hw)
 		/* Release semaphores */
 		igb_put_hw_semaphore(hw);
 		hw_dbg("Driver can't access the NVM\n");
-		ret_val = -E1000_ERR_NVM;
-		goto out;
+		return -E1000_ERR_NVM;
 	}
 
-out:
-	return ret_val;
+	return E1000_SUCCESS;
 }
 
 /**
@@ -99,23 +129,6 @@ void igb_release_nvm_i210(struct e1000_hw *hw)
 }
 
 /**
- *  igb_put_hw_semaphore_i210 - Release hardware semaphore
- *  @hw: pointer to the HW structure
- *
- *  Release hardware semaphore used to access the PHY or NVM
- */
-static void igb_put_hw_semaphore_i210(struct e1000_hw *hw)
-{
-	u32 swsm;
-
-	swsm = rd32(E1000_SWSM);
-
-	swsm &= ~E1000_SWSM_SWESMBI;
-
-	wr32(E1000_SWSM, swsm);
-}
-
-/**
  *  igb_acquire_swfw_sync_i210 - Acquire SW/FW semaphore
  *  @hw: pointer to the HW structure
  *  @mask: specifies which semaphore to acquire
@@ -138,13 +151,11 @@ s32 igb_acquire_swfw_sync_i210(struct e1000_hw *hw, u16 mask)
 		}
 
 		swfw_sync = rd32(E1000_SW_FW_SYNC);
-		if (!(swfw_sync & fwmask))
+		if (!(swfw_sync & (fwmask | swmask)))
 			break;
 
-		/*
-		 * Firmware currently using resource (fwmask)
-		 */
-		igb_put_hw_semaphore_i210(hw);
+		/* Firmware currently using resource (fwmask) */
+		igb_put_hw_semaphore(hw);
 		mdelay(5);
 		i++;
 	}
@@ -158,7 +169,7 @@ s32 igb_acquire_swfw_sync_i210(struct e1000_hw *hw, u16 mask)
 	swfw_sync |= swmask;
 	wr32(E1000_SW_FW_SYNC, swfw_sync);
 
-	igb_put_hw_semaphore_i210(hw);
+	igb_put_hw_semaphore(hw);
 out:
 	return ret_val;
 }
@@ -182,7 +193,7 @@ void igb_release_swfw_sync_i210(struct e1000_hw *hw, u16 mask)
 	swfw_sync &= ~mask;
 	wr32(E1000_SW_FW_SYNC, swfw_sync);
 
-	igb_put_hw_semaphore_i210(hw);
+	igb_put_hw_semaphore(hw);
 }
 
 /**
@@ -203,7 +214,8 @@ s32 igb_read_nvm_srrd_i210(struct e1000_hw *hw, u16 offset, u16 words,
 
 	/* We cannot hold synchronization semaphores for too long,
 	 * because of forceful takeover procedure. However it is more efficient
-	 * to read in bursts than synchronizing access for each word. */
+	 * to read in bursts than synchronizing access for each word.
+	 */
 	for (i = 0; i < words; i += E1000_EERD_EEWR_MAX_COUNT) {
 		count = (words - i) / E1000_EERD_EEWR_MAX_COUNT > 0 ?
 			E1000_EERD_EEWR_MAX_COUNT : (words - i);
@@ -242,8 +254,7 @@ static s32 igb_write_nvm_srwr(struct e1000_hw *hw, u16 offset, u16 words,
 	u32 attempts = 100000;
 	s32 ret_val = E1000_SUCCESS;
 
-	/*
-	 * A check for invalid values:  offset too large, too many words,
+	/* A check for invalid values:  offset too large, too many words,
 	 * too many words for the offset, and not enough words.
 	 */
 	if ((offset >= nvm->word_size) || (words > (nvm->word_size - offset)) ||
@@ -294,7 +305,7 @@ out:
  *
  *  If error code is returned, data and Shadow RAM may be inconsistent - buffer
  *  partially written.
- */
+ **/
 s32 igb_write_nvm_srwr_i210(struct e1000_hw *hw, u16 offset, u16 words,
 			      u16 *data)
 {
@@ -326,7 +337,7 @@ s32 igb_write_nvm_srwr_i210(struct e1000_hw *hw, u16 offset, u16 words,
 /**
  *  igb_read_nvm_i211 - Read NVM wrapper function for I211
  *  @hw: pointer to the HW structure
- *  @address: the word address (aka eeprom offset) to read
+ *  @words: number of words to read
  *  @data: pointer to the data read
  *
  *  Wrapper function to return data formerly found in the NVM.
@@ -549,8 +560,7 @@ s32 igb_validate_nvm_checksum_i210(struct e1000_hw *hw)
 
 	if (hw->nvm.ops.acquire(hw) == E1000_SUCCESS) {
 
-		/*
-		 * Replace the read function with semaphore grabbing with
+		/* Replace the read function with semaphore grabbing with
 		 * the one that skips this for a while.
 		 * We have semaphore taken already here.
 		 */
@@ -570,7 +580,6 @@ s32 igb_validate_nvm_checksum_i210(struct e1000_hw *hw)
 	return status;
 }
 
-
 /**
  *  igb_update_nvm_checksum_i210 - Update EEPROM checksum
  *  @hw: pointer to the HW structure
@@ -585,8 +594,7 @@ s32 igb_update_nvm_checksum_i210(struct e1000_hw *hw)
 	u16 checksum = 0;
 	u16 i, nvm_data;
 
-	/*
-	 * Read the first word from the EEPROM. If this times out or fails, do
+	/* Read the first word from the EEPROM. If this times out or fails, do
 	 * not continue or we could be in for a very long wait while every
 	 * EEPROM read fails
 	 */
@@ -597,8 +605,7 @@ s32 igb_update_nvm_checksum_i210(struct e1000_hw *hw)
 	}
 
 	if (hw->nvm.ops.acquire(hw) == E1000_SUCCESS) {
-		/*
-		 * Do not use hw->nvm.ops.write, hw->nvm.ops.read
+		/* Do not use hw->nvm.ops.write, hw->nvm.ops.read
 		 * because we do not want to take the synchronization
 		 * semaphores twice here.
 		 */
@@ -635,7 +642,7 @@ out:
  *  igb_pool_flash_update_done_i210 - Pool FLUDONE status.
  *  @hw: pointer to the HW structure
  *
- */
+ **/
 static s32 igb_pool_flash_update_done_i210(struct e1000_hw *hw)
 {
 	s32 ret_val = -E1000_ERR_NVM;
@@ -714,3 +721,68 @@ s32 igb_valid_led_default_i210(struct e1000_hw *hw, u16 *data)
 out:
 	return ret_val;
 }
+
+/**
+ *  __igb_access_xmdio_reg - Read/write XMDIO register
+ *  @hw: pointer to the HW structure
+ *  @address: XMDIO address to program
+ *  @dev_addr: device address to program
+ *  @data: pointer to value to read/write from/to the XMDIO address
+ *  @read: boolean flag to indicate read or write
+ **/
+static s32 __igb_access_xmdio_reg(struct e1000_hw *hw, u16 address,
+				  u8 dev_addr, u16 *data, bool read)
+{
+	s32 ret_val = E1000_SUCCESS;
+
+	ret_val = hw->phy.ops.write_reg(hw, E1000_MMDAC, dev_addr);
+	if (ret_val)
+		return ret_val;
+
+	ret_val = hw->phy.ops.write_reg(hw, E1000_MMDAAD, address);
+	if (ret_val)
+		return ret_val;
+
+	ret_val = hw->phy.ops.write_reg(hw, E1000_MMDAC, E1000_MMDAC_FUNC_DATA |
+							 dev_addr);
+	if (ret_val)
+		return ret_val;
+
+	if (read)
+		ret_val = hw->phy.ops.read_reg(hw, E1000_MMDAAD, data);
+	else
+		ret_val = hw->phy.ops.write_reg(hw, E1000_MMDAAD, *data);
+	if (ret_val)
+		return ret_val;
+
+	/* Recalibrate the device back to 0 */
+	ret_val = hw->phy.ops.write_reg(hw, E1000_MMDAC, 0);
+	if (ret_val)
+		return ret_val;
+
+	return ret_val;
+}
+
+/**
+ *  igb_read_xmdio_reg - Read XMDIO register
+ *  @hw: pointer to the HW structure
+ *  @addr: XMDIO address to program
+ *  @dev_addr: device address to program
+ *  @data: value to be read from the EMI address
+ **/
+s32 igb_read_xmdio_reg(struct e1000_hw *hw, u16 addr, u8 dev_addr, u16 *data)
+{
+	return __igb_access_xmdio_reg(hw, addr, dev_addr, data, true);
+}
+
+/**
+ *  igb_write_xmdio_reg - Write XMDIO register
+ *  @hw: pointer to the HW structure
+ *  @addr: XMDIO address to program
+ *  @dev_addr: device address to program
+ *  @data: value to be written to the XMDIO address
+ **/
+s32 igb_write_xmdio_reg(struct e1000_hw *hw, u16 addr, u8 dev_addr, u16 data)
+{
+	return __igb_access_xmdio_reg(hw, addr, dev_addr, &data, false);
+}