[net-next 0/5][pull request] Intel Wired LAN Driver Updates

[net-next 0/5][pull request] Intel Wired LAN Driver Updates

[Jeff Kirsher]

The following series contains updates to igbvf and igb.
This version of the series contains the following changes:

- igb 2 fixes (VFTA table, Alt. MAC addr) and move DMA coalescing init
  code into separate function
- igbvf bump version and update identification strings

The following are changes since commit :
  
and are available in the git repository at
  git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-next.git

Carolyn Wyborny (3):
  igb: Fix for Alt MAC Address feature on 82580 and later devices
  igb: Move DMA Coalescing init code to separate function.
  igb: VFTA Table Fix for i350 devices

Williams, Mitch A (2):
  igbvf: Update module identification strings
  igbvf: Bump version number

 drivers/net/ethernet/intel/igb/e1000_82575.c |    5 +-
 drivers/net/ethernet/intel/igb/e1000_mac.c   |   63 ++++++++++++-
 drivers/net/ethernet/intel/igb/e1000_mac.h   |    1 +
 drivers/net/ethernet/intel/igb/igb.h         |    1 +
 drivers/net/ethernet/intel/igb/igb_main.c    |  130 +++++++++++++++-----------
 drivers/net/ethernet/intel/igbvf/netdev.c    |   14 ++-
 6 files changed, 148 insertions(+), 66 deletions(-)

-- 
1.7.6.4

[net-next 1/5] igbvf: Update module identification strings

[Jeff Kirsher]

From: "Williams, Mitch A" <mitch.a.williams@intel.com>

Update adapter identification strings to properly indicate i350 VF devices
in the VF driver. Change the driver ID string to remove 82576-specific
wording. Update copyright date.

Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igbvf/netdev.c |   12 +++++++-----
 1 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/intel/igbvf/netdev.c b/drivers/net/ethernet/intel/igbvf/netdev.c
index db29817..10e3c9c 100644
--- a/drivers/net/ethernet/intel/igbvf/netdev.c
+++ b/drivers/net/ethernet/intel/igbvf/netdev.c
@@ -49,9 +49,9 @@
 char igbvf_driver_name[] = "igbvf";
 const char igbvf_driver_version[] = DRV_VERSION;
 static const char igbvf_driver_string[] =
-				"Intel(R) Virtual Function Network Driver";
+		  "Intel(R) Gigabit Virtual Function Network Driver";
 static const char igbvf_copyright[] =
-				"Copyright (c) 2009 - 2010 Intel Corporation.";
+		  "Copyright (c) 2009 - 2011 Intel Corporation.";
 
 static int igbvf_poll(struct napi_struct *napi, int budget);
 static void igbvf_reset(struct igbvf_adapter *);
@@ -2525,9 +2525,11 @@ static void igbvf_print_device_info(struct igbvf_adapter *adapter)
 	struct net_device *netdev = adapter->netdev;
 	struct pci_dev *pdev = adapter->pdev;
 
-	dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n");
+	if (hw->mac.type == e1000_vfadapt_i350)
+		dev_info(&pdev->dev, "Intel(R) I350 Virtual Function\n");
+	else
+		dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n");
 	dev_info(&pdev->dev, "Address: %pM\n", netdev->dev_addr);
-	dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type);
 }
 
 static int igbvf_set_features(struct net_device *netdev, u32 features)
@@ -2864,7 +2866,7 @@ module_exit(igbvf_exit_module);
 
 
 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
-MODULE_DESCRIPTION("Intel(R) 82576 Virtual Function Network Driver");
+MODULE_DESCRIPTION("Intel(R) Gigabit Virtual Function Network Driver");
 MODULE_LICENSE("GPL");
 MODULE_VERSION(DRV_VERSION);
 
-- 
1.7.6.4

[net-next 2/5] igbvf: Bump version number

[Jeff Kirsher]

From: "Williams, Mitch A" <mitch.a.williams@intel.com>

Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igbvf/netdev.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/ethernet/intel/igbvf/netdev.c b/drivers/net/ethernet/intel/igbvf/netdev.c
index 10e3c9c..cca7812 100644
--- a/drivers/net/ethernet/intel/igbvf/netdev.c
+++ b/drivers/net/ethernet/intel/igbvf/netdev.c
@@ -45,7 +45,7 @@
 
 #include "igbvf.h"
 
-#define DRV_VERSION "2.0.0-k"
+#define DRV_VERSION "2.0.1-k"
 char igbvf_driver_name[] = "igbvf";
 const char igbvf_driver_version[] = DRV_VERSION;
 static const char igbvf_driver_string[] =
-- 
1.7.6.4

[net-next 3/5] igb: Fix for Alt MAC Address feature on 82580 and later devices

[Jeff Kirsher]

From: Carolyn Wyborny <carolyn.wyborny@intel.com>

In 82580 and later devices, the alternate MAC address feature is
completely handled by the option ROM and software does not handle
it anymore.  This patch changes the check_alt_mac_addr function to
exit immediately if device is 82580 or later.

Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igb/e1000_mac.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/net/ethernet/intel/igb/e1000_mac.c b/drivers/net/ethernet/intel/igb/e1000_mac.c
index 872119d..bad3e14 100644
--- a/drivers/net/ethernet/intel/igb/e1000_mac.c
+++ b/drivers/net/ethernet/intel/igb/e1000_mac.c
@@ -191,6 +191,13 @@ s32 igb_check_alt_mac_addr(struct e1000_hw *hw)
 	u16 offset, nvm_alt_mac_addr_offset, nvm_data;
 	u8 alt_mac_addr[ETH_ALEN];
 
+	/*
+	 * Alternate MAC address is handled by the option ROM for 82580
+	 * and newer. SW support not required.
+	 */
+	if (hw->mac.type >= e1000_82580)
+		goto out;
+
 	ret_val = hw->nvm.ops.read(hw, NVM_ALT_MAC_ADDR_PTR, 1,
 				 &nvm_alt_mac_addr_offset);
 	if (ret_val) {
-- 
1.7.6.4

[net-next 4/5] igb: Move DMA Coalescing init code to separate function.

[Jeff Kirsher]

From: Carolyn Wyborny <carolyn.wyborny@intel.com>

This patch moves the DMA Coalescing feature initialization code from
igb_reset to a new function and replaces it with a call to the new
function.

Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igb/igb_main.c |  124 ++++++++++++++++-------------
 1 files changed, 68 insertions(+), 56 deletions(-)

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index f689aa1..b186353 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -204,6 +204,7 @@ static struct pci_error_handlers igb_err_handler = {
 	.resume = igb_io_resume,
 };
 
+static void igb_init_dmac(struct igb_adapter *adapter, u32 pba);
 
 static struct pci_driver igb_driver = {
 	.name     = igb_driver_name,
@@ -1728,63 +1729,8 @@ void igb_reset(struct igb_adapter *adapter)
 
 	if (hw->mac.ops.init_hw(hw))
 		dev_err(&pdev->dev, "Hardware Error\n");
-	if (hw->mac.type > e1000_82580) {
-		if (adapter->flags & IGB_FLAG_DMAC) {
-			u32 reg;
-
-			/*
-			 * DMA Coalescing high water mark needs to be higher
-			 * than * the * Rx threshold.  The Rx threshold is
-			 * currently * pba - 6, so we * should use a high water
-			 * mark of pba * - 4. */
-			hwm = (pba - 4) << 10;
-
-			reg = (((pba-6) << E1000_DMACR_DMACTHR_SHIFT)
-			       & E1000_DMACR_DMACTHR_MASK);
-
-			/* transition to L0x or L1 if available..*/
-			reg |= (E1000_DMACR_DMAC_EN | E1000_DMACR_DMAC_LX_MASK);
-
-			/* watchdog timer= +-1000 usec in 32usec intervals */
-			reg |= (1000 >> 5);
-			wr32(E1000_DMACR, reg);
-
-			/* no lower threshold to disable coalescing(smart fifb)
-			 * -UTRESH=0*/
-			wr32(E1000_DMCRTRH, 0);
-
-			/* set hwm to PBA -  2 * max frame size */
-			wr32(E1000_FCRTC, hwm);
 
-			/*
-			 * This sets the time to wait before requesting tran-
-			 * sition to * low power state to number of usecs needed
-			 * to receive 1 512 * byte frame at gigabit line rate
-			 */
-			reg = rd32(E1000_DMCTLX);
-			reg |= IGB_DMCTLX_DCFLUSH_DIS;
-
-			/* Delay 255 usec before entering Lx state. */
-			reg |= 0xFF;
-			wr32(E1000_DMCTLX, reg);
-
-			/* free space in Tx packet buffer to wake from DMAC */
-			wr32(E1000_DMCTXTH,
-			     (IGB_MIN_TXPBSIZE -
-			     (IGB_TX_BUF_4096 + adapter->max_frame_size))
-			     >> 6);
-
-			/* make low power state decision controlled by DMAC */
-			reg = rd32(E1000_PCIEMISC);
-			reg |= E1000_PCIEMISC_LX_DECISION;
-			wr32(E1000_PCIEMISC, reg);
-		} /* end if IGB_FLAG_DMAC set */
-	}
-	if (hw->mac.type == e1000_82580) {
-		u32 reg = rd32(E1000_PCIEMISC);
-		wr32(E1000_PCIEMISC,
-		                reg & ~E1000_PCIEMISC_LX_DECISION);
-	}
+	igb_init_dmac(adapter, pba);
 	if (!netif_running(adapter->netdev))
 		igb_power_down_link(adapter);
 
@@ -7098,4 +7044,70 @@ static void igb_vmm_control(struct igb_adapter *adapter)
 	}
 }
 
+static void igb_init_dmac(struct igb_adapter *adapter, u32 pba)
+{
+	struct e1000_hw *hw = &adapter->hw;
+	u32 dmac_thr;
+	u16 hwm;
+
+	if (hw->mac.type > e1000_82580) {
+		if (adapter->flags & IGB_FLAG_DMAC) {
+			u32 reg;
+
+			/* force threshold to 0. */
+			wr32(E1000_DMCTXTH, 0);
+
+			/*
+			 * DMA Coalescing high water mark needs to be higher
+			 * than the RX threshold. set hwm to PBA -  2 * max
+			 * frame size
+			 */
+			hwm = pba - (2 * adapter->max_frame_size);
+			reg = rd32(E1000_DMACR);
+			reg &= ~E1000_DMACR_DMACTHR_MASK;
+			dmac_thr = pba - 4;
+
+			reg |= ((dmac_thr << E1000_DMACR_DMACTHR_SHIFT)
+				& E1000_DMACR_DMACTHR_MASK);
+
+			/* transition to L0x or L1 if available..*/
+			reg |= (E1000_DMACR_DMAC_EN | E1000_DMACR_DMAC_LX_MASK);
+
+			/* watchdog timer= +-1000 usec in 32usec intervals */
+			reg |= (1000 >> 5);
+			wr32(E1000_DMACR, reg);
+
+			/*
+			 * no lower threshold to disable
+			 * coalescing(smart fifb)-UTRESH=0
+			 */
+			wr32(E1000_DMCRTRH, 0);
+			wr32(E1000_FCRTC, hwm);
+
+			reg = (IGB_DMCTLX_DCFLUSH_DIS | 0x4);
+
+			wr32(E1000_DMCTLX, reg);
+
+			/*
+			 * free space in tx packet buffer to wake from
+			 * DMA coal
+			 */
+			wr32(E1000_DMCTXTH, (IGB_MIN_TXPBSIZE -
+			     (IGB_TX_BUF_4096 + adapter->max_frame_size)) >> 6);
+
+			/*
+			 * make low power state decision controlled
+			 * by DMA coal
+			 */
+			reg = rd32(E1000_PCIEMISC);
+			reg &= ~E1000_PCIEMISC_LX_DECISION;
+			wr32(E1000_PCIEMISC, reg);
+		} /* endif adapter->dmac is not disabled */
+	} else if (hw->mac.type == e1000_82580) {
+		u32 reg = rd32(E1000_PCIEMISC);
+		wr32(E1000_PCIEMISC, reg & ~E1000_PCIEMISC_LX_DECISION);
+		wr32(E1000_DMACR, 0);
+	}
+}
+
 /* igb_main.c */
-- 
1.7.6.4

[net-next 5/5] igb: VFTA Table Fix for i350 devices

[Jeff Kirsher]

From: Carolyn Wyborny <carolyn.wyborny@intel.com>

Due to a hardware problem, writes to the VFTA register can
theoretically fail. Although the likelihood of this is very low.
This patch adds a shadow vfta in the adapter struct for reading
and adds new write functions for these devices to work around the problem.

Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igb/e1000_82575.c |    5 ++-
 drivers/net/ethernet/intel/igb/e1000_mac.c   |   56 ++++++++++++++++++++++++-
 drivers/net/ethernet/intel/igb/e1000_mac.h   |    1 +
 drivers/net/ethernet/intel/igb/igb.h         |    1 +
 drivers/net/ethernet/intel/igb/igb_main.c    |    6 +++
 5 files changed, 65 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/intel/igb/e1000_82575.c b/drivers/net/ethernet/intel/igb/e1000_82575.c
index 6580cea..7881fb9 100644
--- a/drivers/net/ethernet/intel/igb/e1000_82575.c
+++ b/drivers/net/ethernet/intel/igb/e1000_82575.c
@@ -1051,7 +1051,10 @@ static s32 igb_init_hw_82575(struct e1000_hw *hw)
 
 	/* Disabling VLAN filtering */
 	hw_dbg("Initializing the IEEE VLAN\n");
-	igb_clear_vfta(hw);
+	if (hw->mac.type == e1000_i350)
+		igb_clear_vfta_i350(hw);
+	else
+		igb_clear_vfta(hw);
 
 	/* Setup the receive address */
 	igb_init_rx_addrs(hw, rar_count);
diff --git a/drivers/net/ethernet/intel/igb/e1000_mac.c b/drivers/net/ethernet/intel/igb/e1000_mac.c
index bad3e14..73aac08 100644
--- a/drivers/net/ethernet/intel/igb/e1000_mac.c
+++ b/drivers/net/ethernet/intel/igb/e1000_mac.c
@@ -117,6 +117,50 @@ static void igb_write_vfta(struct e1000_hw *hw, u32 offset, u32 value)
 	wrfl();
 }
 
+/* Due to a hw errata, if the host tries to  configure the VFTA register
+ * while performing queries from the BMC or DMA, then the VFTA in some
+ * cases won't be written.
+ */
+
+/**
+ *  igb_clear_vfta_i350 - Clear VLAN filter table
+ *  @hw: pointer to the HW structure
+ *
+ *  Clears the register array which contains the VLAN filter table by
+ *  setting all the values to 0.
+ **/
+void igb_clear_vfta_i350(struct e1000_hw *hw)
+{
+	u32 offset;
+	int i;
+
+	for (offset = 0; offset < E1000_VLAN_FILTER_TBL_SIZE; offset++) {
+		for (i = 0; i < 10; i++)
+			array_wr32(E1000_VFTA, offset, 0);
+
+		wrfl();
+	}
+}
+
+/**
+ *  igb_write_vfta_i350 - Write value to VLAN filter table
+ *  @hw: pointer to the HW structure
+ *  @offset: register offset in VLAN filter table
+ *  @value: register value written to VLAN filter table
+ *
+ *  Writes value at the given offset in the register array which stores
+ *  the VLAN filter table.
+ **/
+void igb_write_vfta_i350(struct e1000_hw *hw, u32 offset, u32 value)
+{
+	int i;
+
+	for (i = 0; i < 10; i++)
+		array_wr32(E1000_VFTA, offset, value);
+
+	wrfl();
+}
+
 /**
  *  igb_init_rx_addrs - Initialize receive address's
  *  @hw: pointer to the HW structure
@@ -155,9 +199,12 @@ s32 igb_vfta_set(struct e1000_hw *hw, u32 vid, bool add)
 {
 	u32 index = (vid >> E1000_VFTA_ENTRY_SHIFT) & E1000_VFTA_ENTRY_MASK;
 	u32 mask = 1 << (vid & E1000_VFTA_ENTRY_BIT_SHIFT_MASK);
-	u32 vfta = array_rd32(E1000_VFTA, index);
+	u32 vfta;
+	struct igb_adapter *adapter = hw->back;
 	s32 ret_val = 0;
 
+	vfta = adapter->shadow_vfta[index];
+
 	/* bit was set/cleared before we started */
 	if ((!!(vfta & mask)) == add) {
 		ret_val = -E1000_ERR_CONFIG;
@@ -167,8 +214,11 @@ s32 igb_vfta_set(struct e1000_hw *hw, u32 vid, bool add)
 		else
 			vfta &= ~mask;
 	}
-
-	igb_write_vfta(hw, index, vfta);
+	if (hw->mac.type == e1000_i350)
+		igb_write_vfta_i350(hw, index, vfta);
+	else
+		igb_write_vfta(hw, index, vfta);
+	adapter->shadow_vfta[index] = vfta;
 
 	return ret_val;
 }
diff --git a/drivers/net/ethernet/intel/igb/e1000_mac.h b/drivers/net/ethernet/intel/igb/e1000_mac.h
index 4927f61..e45996b 100644
--- a/drivers/net/ethernet/intel/igb/e1000_mac.h
+++ b/drivers/net/ethernet/intel/igb/e1000_mac.h
@@ -60,6 +60,7 @@ s32  igb_write_8bit_ctrl_reg(struct e1000_hw *hw, u32 reg,
 
 void igb_clear_hw_cntrs_base(struct e1000_hw *hw);
 void igb_clear_vfta(struct e1000_hw *hw);
+void igb_clear_vfta_i350(struct e1000_hw *hw);
 s32  igb_vfta_set(struct e1000_hw *hw, u32 vid, bool add);
 void igb_config_collision_dist(struct e1000_hw *hw);
 void igb_init_rx_addrs(struct e1000_hw *hw, u16 rar_count);
diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h
index 5594430..c69feeb 100644
--- a/drivers/net/ethernet/intel/igb/igb.h
+++ b/drivers/net/ethernet/intel/igb/igb.h
@@ -363,6 +363,7 @@ struct igb_adapter {
 	u32 rss_queues;
 	u32 wvbr;
 	int node;
+	u32 *shadow_vfta;
 };
 
 #define IGB_FLAG_HAS_MSI           (1 << 0)
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index b186353..ced5444 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -2206,6 +2206,7 @@ static void __devexit igb_remove(struct pci_dev *pdev)
 	pci_release_selected_regions(pdev,
 	                             pci_select_bars(pdev, IORESOURCE_MEM));
 
+	kfree(adapter->shadow_vfta);
 	free_netdev(netdev);
 
 	pci_disable_pcie_error_reporting(pdev);
@@ -2438,6 +2439,11 @@ static int __devinit igb_sw_init(struct igb_adapter *adapter)
 	    ((adapter->rss_queues > 1) && (adapter->vfs_allocated_count > 6)))
 		adapter->flags |= IGB_FLAG_QUEUE_PAIRS;
 
+	/* Setup and initialize a copy of the hw vlan table array */
+	adapter->shadow_vfta = kzalloc(sizeof(u32) *
+				E1000_VLAN_FILTER_TBL_SIZE,
+				GFP_ATOMIC);
+
 	/* This call may decrease the number of queues */
 	if (igb_init_interrupt_scheme(adapter)) {
 		dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
-- 
1.7.6.4

Re: [net-next 3/5] igb: Fix for Alt MAC Address feature on 82580 and later devices

[David Lamparter]

On Fri, Oct 21, 2011 at 03:31:59AM -0700, Jeff Kirsher wrote:
> From: Carolyn Wyborny <carolyn.wyborny@intel.com>
> 
> In 82580 and later devices, the alternate MAC address feature is
> completely handled by the option ROM and software does not handle
> it anymore.  This patch changes the check_alt_mac_addr function to
> exit immediately if device is 82580 or later.

'Stupid' question: what happens if you put such a card with an x86 
Option ROM into a, say, PowerPC server?

Just feeling like the devil's advocate today :)


-David

Re: [net-next 0/5][pull request] Intel Wired LAN Driver Updates

[David Miller]

From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Fri, 21 Oct 2011 03:31:56 -0700

> The following series contains updates to igbvf and igb.
> This version of the series contains the following changes:
> 
> - igb 2 fixes (VFTA table, Alt. MAC addr) and move DMA coalescing init
>   code into separate function
> - igbvf bump version and update identification strings
> 
> The following are changes since commit :
>   
> and are available in the git repository at
>   git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-next.git

Pulled, thanks Jeff.