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| author | Don Skidmore <donald.c.skidmore@intel.com> | 2016-04-12 19:25:10 -0400 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2016-04-25 04:10:27 -0700 |
| commit | 4319a7976722f6925b5bbbdac417d87a0cbde859 (patch) | |
| tree | 1ae91687eedb2de67cffdd5f8c8a8da0e2b2ffaa /drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | |
| parent | a0254a70b4f91396ad04b1225dd7c10a680d38ff (diff) | |
| download | linux-stable-4319a7976722f6925b5bbbdac417d87a0cbde859.tar.gz linux-stable-4319a7976722f6925b5bbbdac417d87a0cbde859.tar.bz2 linux-stable-4319a7976722f6925b5bbbdac417d87a0cbde859.zip | |
ixgbe: Add work around for empty SFP+ cage crosstalk
It is possible on some systems that crosstalk could lead to link flap
on empty SFP+ cages. A new NVM bit was defined to let SW know it
needs to implement the work around which consists of verifying that
there is a module in the cage before acting on the LSC.
Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/ixgbe/ixgbe_main.c')
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index 517f06e6c3d8..09d7c8bdcd5c 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -5572,6 +5572,7 @@ static int ixgbe_sw_init(struct ixgbe_adapter *adapter) struct pci_dev *pdev = adapter->pdev; unsigned int rss, fdir; u32 fwsm; + u16 device_caps; #ifdef CONFIG_IXGBE_DCB int j; struct tc_configuration *tc; @@ -5737,6 +5738,22 @@ static int ixgbe_sw_init(struct ixgbe_adapter *adapter) adapter->tx_ring_count = IXGBE_DEFAULT_TXD; adapter->rx_ring_count = IXGBE_DEFAULT_RXD; + /* Cache bit indicating need for crosstalk fix */ + switch (hw->mac.type) { + case ixgbe_mac_82599EB: + case ixgbe_mac_X550EM_x: + case ixgbe_mac_x550em_a: + hw->mac.ops.get_device_caps(hw, &device_caps); + if (device_caps & IXGBE_DEVICE_CAPS_NO_CROSSTALK_WR) + adapter->need_crosstalk_fix = false; + else + adapter->need_crosstalk_fix = true; + break; + default: + adapter->need_crosstalk_fix = false; + break; + } + /* set default work limits */ adapter->tx_work_limit = IXGBE_DEFAULT_TX_WORK; @@ -6659,6 +6676,18 @@ static void ixgbe_watchdog_update_link(struct ixgbe_adapter *adapter) link_up = true; } + /* If Crosstalk fix enabled do the sanity check of making sure + * the SFP+ cage is empty. + */ + if (adapter->need_crosstalk_fix) { + u32 sfp_cage_full; + + sfp_cage_full = IXGBE_READ_REG(hw, IXGBE_ESDP) & + IXGBE_ESDP_SDP2; + if (ixgbe_is_sfp(hw) && link_up && !sfp_cage_full) + link_up = false; + } + if (adapter->ixgbe_ieee_pfc) pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en); @@ -7005,6 +7034,16 @@ static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter) struct ixgbe_hw *hw = &adapter->hw; s32 err; + /* If crosstalk fix enabled verify the SFP+ cage is full */ + if (adapter->need_crosstalk_fix) { + u32 sfp_cage_full; + + sfp_cage_full = IXGBE_READ_REG(hw, IXGBE_ESDP) & + IXGBE_ESDP_SDP2; + if (!sfp_cage_full) + return; + } + /* not searching for SFP so there is nothing to do here */ if (!(adapter->flags2 & IXGBE_FLAG2_SEARCH_FOR_SFP) && !(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET)) |