Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-next

Jeff Kirsher says:

====================
This series contains updates to e1000e, igb and ixgbe.

There are 2 patches in this series which could be applied to net,
but since Linus is so very close to releasing 3.9, I do not think
it prudent to try and push these into net at this time.  I have CC'd
stable on these patches so that they can queue them up as soon as
3.9 gets released.

The 2 patches are:
  e1000e: fix numeric overflow in phc settime method
  ixgbe: fix EICR write in ixgbe_msix_other

Richard provides a fix for e1000e by using a helper function from time.h
to resolve a unintended overflow in the PTP settime function.

Bruce provides a fix to wait for NAPI to be done with the current context
after disabling interrupts and then disable NAPI when the interface
is going down.  This fixes a possible "unable to handle kernel paging
request" panic in net-next.

Andi Kleen provides a patch for igb to use mdelay instead of udelay
when we needed 100000us.

Jacob provides a fix for ixgbe to simply mask the lower 16bits off so that
ixgbe_msix_other does not write them in the EICR, which causes them to
remain high and be properly handled by the clean_rings interrupt routine
as normal.

Emil cleans up the logic in ixgbe_setup_loopback_test() to only access
registers applicable to the MAC type.  In addition, removes majority
of the AUTOC register reads by using a cached value instead to avoid
writing corrupted values to AUTOC due to bad FW.  Emil also add support
for disabling link during boot time.  Lastly, he provides a patch which
adds the MAC type to the version in ethtool_regs which will make it
easier to check the MAC type when dumping registers with ethtool.

There is a separate ethtool tool patch which is dependent upon Emil's
last patch of the series to add the MAC type to the version in
ethtool_regs, which will be sent separately.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

7 files changed, 80 insertions, 38 deletions

diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index da7f2fad5ba..a27e3bcc324 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -4016,6 +4016,8 @@ void e1000e_down(struct e1000_adapter *adapter)
 
 	e1000_irq_disable(adapter);
 
+	napi_synchronize(&adapter->napi);
+
 	del_timer_sync(&adapter->watchdog_timer);
 	del_timer_sync(&adapter->phy_info_timer);
 
@@ -4372,12 +4374,13 @@ static int e1000_close(struct net_device *netdev)
 
 	pm_runtime_get_sync(&pdev->dev);
 
-	napi_disable(&adapter->napi);
-
 	if (!test_bit(__E1000_DOWN, &adapter->state)) {
 		e1000e_down(adapter);
 		e1000_free_irq(adapter);
 	}
+
+	napi_disable(&adapter->napi);
+
 	e1000_power_down_phy(adapter);
 
 	e1000e_free_tx_resources(adapter->tx_ring);
diff --git a/drivers/net/ethernet/intel/e1000e/ptp.c b/drivers/net/ethernet/intel/e1000e/ptp.c
index b477fa53ec9..065f8c80d4f 100644
--- a/drivers/net/ethernet/intel/e1000e/ptp.c
+++ b/drivers/net/ethernet/intel/e1000e/ptp.c
@@ -145,8 +145,7 @@ static int e1000e_phc_settime(struct ptp_clock_info *ptp,
 	unsigned long flags;
 	u64 ns;
 
-	ns = ts->tv_sec * NSEC_PER_SEC;
-	ns += ts->tv_nsec;
+	ns = timespec_to_ns(ts);
 
 	/* reset the timecounter */
 	spin_lock_irqsave(&adapter->systim_lock, flags);
diff --git a/drivers/net/ethernet/intel/igb/e1000_phy.c b/drivers/net/ethernet/intel/igb/e1000_phy.c
index fd46add6c4e..115b0da6e01 100644
--- a/drivers/net/ethernet/intel/igb/e1000_phy.c
+++ b/drivers/net/ethernet/intel/igb/e1000_phy.c
@@ -1130,7 +1130,7 @@ s32 igb_phy_force_speed_duplex_igp(struct e1000_hw *hw)
 	if (phy->autoneg_wait_to_complete) {
 		hw_dbg("Waiting for forced speed/duplex link on IGP phy.\n");
 
-		ret_val = igb_phy_has_link(hw, PHY_FORCE_LIMIT, 100000, &link);
+		ret_val = igb_phy_has_link(hw, PHY_FORCE_LIMIT, 10000, &link);
 		if (ret_val)
 			goto out;
 
@@ -1138,7 +1138,7 @@ s32 igb_phy_force_speed_duplex_igp(struct e1000_hw *hw)
 			hw_dbg("Link taking longer than expected.\n");
 
 		/* Try once more */
-		ret_val = igb_phy_has_link(hw, PHY_FORCE_LIMIT, 100000, &link);
+		ret_val = igb_phy_has_link(hw, PHY_FORCE_LIMIT, 10000, &link);
 		if (ret_val)
 			goto out;
 	}
@@ -1590,7 +1590,7 @@ s32 igb_phy_has_link(struct e1000_hw *hw, u32 iterations,
 		 * it across the board.
 		 */
 		ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);
-		if (ret_val) {
+		if (ret_val && usec_interval > 0) {
 			/* If the first read fails, another entity may have
 			 * ownership of the resources, wait and try again to
 			 * see if they have relinquished the resources yet.
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
index 3f792428ca5..0b82d38bc97 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
@@ -167,9 +167,9 @@ static s32 ixgbe_setup_sfp_modules_82599(struct ixgbe_hw *hw)
 		}
 
 		/* Restart DSP and set SFI mode */
-		IXGBE_WRITE_REG(hw, IXGBE_AUTOC, (IXGBE_READ_REG(hw,
-				IXGBE_AUTOC) | IXGBE_AUTOC_LMS_10G_SERIAL));
-
+		IXGBE_WRITE_REG(hw, IXGBE_AUTOC, ((hw->mac.orig_autoc) |
+				IXGBE_AUTOC_LMS_10G_SERIAL));
+		hw->mac.cached_autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);
 		ret_val = ixgbe_reset_pipeline_82599(hw);
 
 		if (got_lock) {
@@ -803,12 +803,9 @@ static s32 ixgbe_setup_mac_link_82599(struct ixgbe_hw *hw,
 				      bool autoneg_wait_to_complete)
 {
 	s32 status = 0;
-	u32 autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);
+	u32 autoc, pma_pmd_1g, link_mode, start_autoc;
 	u32 autoc2 = IXGBE_READ_REG(hw, IXGBE_AUTOC2);
-	u32 start_autoc = autoc;
 	u32 orig_autoc = 0;
-	u32 link_mode = autoc & IXGBE_AUTOC_LMS_MASK;
-	u32 pma_pmd_1g = autoc & IXGBE_AUTOC_1G_PMA_PMD_MASK;
 	u32 pma_pmd_10g_serial = autoc2 & IXGBE_AUTOC2_10G_SERIAL_PMA_PMD_MASK;
 	u32 links_reg;
 	u32 i;
@@ -831,9 +828,14 @@ static s32 ixgbe_setup_mac_link_82599(struct ixgbe_hw *hw,
 
 	/* Use stored value (EEPROM defaults) of AUTOC to find KR/KX4 support*/
 	if (hw->mac.orig_link_settings_stored)
-		orig_autoc = hw->mac.orig_autoc;
+		autoc = hw->mac.orig_autoc;
 	else
-		orig_autoc = autoc;
+		autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);
+
+	orig_autoc = autoc;
+	start_autoc = hw->mac.cached_autoc;
+	link_mode = autoc & IXGBE_AUTOC_LMS_MASK;
+	pma_pmd_1g = autoc & IXGBE_AUTOC_1G_PMA_PMD_MASK;
 
 	if (link_mode == IXGBE_AUTOC_LMS_KX4_KX_KR ||
 	    link_mode == IXGBE_AUTOC_LMS_KX4_KX_KR_1G_AN ||
@@ -887,6 +889,7 @@ static s32 ixgbe_setup_mac_link_82599(struct ixgbe_hw *hw,
 
 		/* Restart link */
 		IXGBE_WRITE_REG(hw, IXGBE_AUTOC, autoc);
+		hw->mac.cached_autoc = autoc;
 		ixgbe_reset_pipeline_82599(hw);
 
 		if (got_lock)
@@ -958,7 +961,7 @@ static s32 ixgbe_reset_hw_82599(struct ixgbe_hw *hw)
 {
 	ixgbe_link_speed link_speed;
 	s32 status;
-	u32 ctrl, i, autoc, autoc2;
+	u32 ctrl, i, autoc2;
 	u32 curr_lms;
 	bool link_up = false;
 
@@ -991,8 +994,12 @@ static s32 ixgbe_reset_hw_82599(struct ixgbe_hw *hw)
 	if (hw->phy.reset_disable == false && hw->phy.ops.reset != NULL)
 		hw->phy.ops.reset(hw);
 
-	/* remember AUTOC LMS from before we reset */
-	curr_lms = IXGBE_READ_REG(hw, IXGBE_AUTOC) & IXGBE_AUTOC_LMS_MASK;
+	/* remember AUTOC from before we reset */
+	if (hw->mac.cached_autoc)
+		curr_lms = hw->mac.cached_autoc & IXGBE_AUTOC_LMS_MASK;
+	else
+		curr_lms = IXGBE_READ_REG(hw, IXGBE_AUTOC) &
+			   IXGBE_AUTOC_LMS_MASK;
 
 mac_reset_top:
 	/*
@@ -1042,10 +1049,18 @@ mac_reset_top:
 	 * stored off yet.  Otherwise restore the stored original
 	 * values since the reset operation sets back to defaults.
 	 */
-	autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);
+	hw->mac.cached_autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);
 	autoc2 = IXGBE_READ_REG(hw, IXGBE_AUTOC2);
+
+	/* Enable link if disabled in NVM */
+	if (autoc2 & IXGBE_AUTOC2_LINK_DISABLE_MASK) {
+		autoc2 &= ~IXGBE_AUTOC2_LINK_DISABLE_MASK;
+		IXGBE_WRITE_REG(hw, IXGBE_AUTOC2, autoc2);
+		IXGBE_WRITE_FLUSH(hw);
+	}
+
 	if (hw->mac.orig_link_settings_stored == false) {
-		hw->mac.orig_autoc = autoc;
+		hw->mac.orig_autoc = hw->mac.cached_autoc;
 		hw->mac.orig_autoc2 = autoc2;
 		hw->mac.orig_link_settings_stored = true;
 	} else {
@@ -1062,7 +1077,7 @@ mac_reset_top:
 				(hw->mac.orig_autoc & ~IXGBE_AUTOC_LMS_MASK) |
 				curr_lms;
 
-		if (autoc != hw->mac.orig_autoc) {
+		if (hw->mac.cached_autoc != hw->mac.orig_autoc) {
 			/* Need SW/FW semaphore around AUTOC writes if LESM is
 			 * on, likewise reset_pipeline requires us to hold
 			 * this lock as it also writes to AUTOC.
@@ -1078,6 +1093,7 @@ mac_reset_top:
 			}
 
 			IXGBE_WRITE_REG(hw, IXGBE_AUTOC, hw->mac.orig_autoc);
+			hw->mac.cached_autoc = hw->mac.orig_autoc;
 			ixgbe_reset_pipeline_82599(hw);
 
 			if (got_lock)
@@ -2178,10 +2194,19 @@ static s32 ixgbe_read_eeprom_82599(struct ixgbe_hw *hw,
  **/
 s32 ixgbe_reset_pipeline_82599(struct ixgbe_hw *hw)
 {
-	s32 i, autoc_reg, ret_val;
-	s32 anlp1_reg = 0;
+	s32 ret_val;
+	u32 anlp1_reg = 0;
+	u32 i, autoc_reg, autoc2_reg;
+
+	/* Enable link if disabled in NVM */
+	autoc2_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC2);
+	if (autoc2_reg & IXGBE_AUTOC2_LINK_DISABLE_MASK) {
+		autoc2_reg &= ~IXGBE_AUTOC2_LINK_DISABLE_MASK;
+		IXGBE_WRITE_REG(hw, IXGBE_AUTOC2, autoc2_reg);
+		IXGBE_WRITE_FLUSH(hw);
+	}
 
-	autoc_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC);
+	autoc_reg = hw->mac.cached_autoc;
 	autoc_reg |= IXGBE_AUTOC_AN_RESTART;
 
 	/* Write AUTOC register with toggled LMS[2] bit and Restart_AN */
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
index bbe00bcc758..d3754722adb 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
@@ -440,7 +440,8 @@ static void ixgbe_get_regs(struct net_device *netdev,
 
 	memset(p, 0, IXGBE_REGS_LEN * sizeof(u32));
 
-	regs->version = (1 << 24) | hw->revision_id << 16 | hw->device_id;
+	regs->version = hw->mac.type << 24 | hw->revision_id << 16 |
+			hw->device_id;
 
 	/* General Registers */
 	regs_buff[0] = IXGBE_READ_REG(hw, IXGBE_CTRL);
@@ -1609,16 +1610,9 @@ static int ixgbe_setup_loopback_test(struct ixgbe_adapter *adapter)
 	struct ixgbe_hw *hw = &adapter->hw;
 	u32 reg_data;
 
-	/* X540 needs to set the MACC.FLU bit to force link up */
-	if (adapter->hw.mac.type == ixgbe_mac_X540) {
-		reg_data = IXGBE_READ_REG(hw, IXGBE_MACC);
-		reg_data |= IXGBE_MACC_FLU;
-		IXGBE_WRITE_REG(hw, IXGBE_MACC, reg_data);
-	}
 
-	/* right now we only support MAC loopback in the driver */
-	reg_data = IXGBE_READ_REG(hw, IXGBE_HLREG0);
 	/* Setup MAC loopback */
+	reg_data = IXGBE_READ_REG(hw, IXGBE_HLREG0);
 	reg_data |= IXGBE_HLREG0_LPBK;
 	IXGBE_WRITE_REG(hw, IXGBE_HLREG0, reg_data);
 
@@ -1626,10 +1620,19 @@ static int ixgbe_setup_loopback_test(struct ixgbe_adapter *adapter)
 	reg_data |= IXGBE_FCTRL_BAM | IXGBE_FCTRL_SBP | IXGBE_FCTRL_MPE;
 	IXGBE_WRITE_REG(hw, IXGBE_FCTRL, reg_data);
 
-	reg_data = IXGBE_READ_REG(hw, IXGBE_AUTOC);
-	reg_data &= ~IXGBE_AUTOC_LMS_MASK;
-	reg_data |= IXGBE_AUTOC_LMS_10G_LINK_NO_AN | IXGBE_AUTOC_FLU;
-	IXGBE_WRITE_REG(hw, IXGBE_AUTOC, reg_data);
+	/* X540 needs to set the MACC.FLU bit to force link up */
+	if (adapter->hw.mac.type == ixgbe_mac_X540) {
+		reg_data = IXGBE_READ_REG(hw, IXGBE_MACC);
+		reg_data |= IXGBE_MACC_FLU;
+		IXGBE_WRITE_REG(hw, IXGBE_MACC, reg_data);
+	} else {
+		if (hw->mac.orig_autoc) {
+			reg_data = hw->mac.orig_autoc | IXGBE_AUTOC_FLU;
+			IXGBE_WRITE_REG(hw, IXGBE_AUTOC, reg_data);
+		} else {
+			return 10;
+		}
+	}
 	IXGBE_WRITE_FLUSH(hw);
 	usleep_range(10000, 20000);
 
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 88f67375e85..d30fbdd81fc 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -2454,6 +2454,16 @@ static irqreturn_t ixgbe_msix_other(int irq, void *data)
 	 * with the write to EICR.
 	 */
 	eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
+
+	/* The lower 16bits of the EICR register are for the queue interrupts
+	 * which should be masked here in order to not accidently clear them if
+	 * the bits are high when ixgbe_msix_other is called. There is a race
+	 * condition otherwise which results in possible performance loss
+	 * especially if the ixgbe_msix_other interrupt is triggering
+	 * consistently (as it would when PPS is turned on for the X540 device)
+	 */
+	eicr &= 0xFFFF0000;
+
 	IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
 
 	if (eicr & IXGBE_EICR_LSC)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
index 6d706653113..70c6aa3d3f9 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
@@ -1593,6 +1593,7 @@ enum {
 #define IXGBE_AUTOC2_10G_KR  (0x0 << IXGBE_AUTOC2_10G_SERIAL_PMA_PMD_SHIFT)
 #define IXGBE_AUTOC2_10G_XFI (0x1 << IXGBE_AUTOC2_10G_SERIAL_PMA_PMD_SHIFT)
 #define IXGBE_AUTOC2_10G_SFI (0x2 << IXGBE_AUTOC2_10G_SERIAL_PMA_PMD_SHIFT)
+#define IXGBE_AUTOC2_LINK_DISABLE_MASK        0x70000000
 
 #define IXGBE_MACC_FLU       0x00000001
 #define IXGBE_MACC_FSV_10G   0x00030000
@@ -2928,6 +2929,7 @@ struct ixgbe_mac_info {
 	u32                             max_tx_queues;
 	u32                             max_rx_queues;
 	u32                             orig_autoc;
+	u32                             cached_autoc;
 	u32                             orig_autoc2;
 	bool                            orig_link_settings_stored;
 	bool                            autotry_restart;