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Date: Fri, 21 Oct 2011 03:32:01 -0700
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: Carolyn Wyborny <carolyn.wyborny@...el.com>,
netdev@...r.kernel.org, gospo@...hat.com, sassmann@...hat.com,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 5/5] igb: VFTA Table Fix for i350 devices
From: Carolyn Wyborny <carolyn.wyborny@...el.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@...el.com>
Tested-by: Aaron Brown <aaron.f.brown@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.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
--
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