summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorYanir Lubetkin <yanirx.lubetkin@intel.com>2015-06-10 01:16:01 +0300
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2015-06-26 02:45:50 -0700
commit93cbfc709047a5bc3f8d86e0b55079b5077c8e00 (patch)
tree58f8bf10fd3a46e56b918fcf928b753220deeeac
parent69cfbc95bdbfa2bd9a82f27dc131b08c48542f19 (diff)
e1000e: i219 - Increase minimum FIFO read/write min gap
Due to clocking changes in the Skylake platform, there was i219 data corruption. To work around this, HW team reported the need to increase the minimum gap between the PHY FIFO read and write pointers. Signed-off-by: Yanir Lubetkin <yanirx.lubetkin@intel.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
-rw-r--r--drivers/net/ethernet/intel/e1000e/ich8lan.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/net/ethernet/intel/e1000e/ich8lan.c
index 983f5bf07bc4..3f5b8cb48512 100644
--- a/drivers/net/ethernet/intel/e1000e/ich8lan.c
+++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c
@@ -1437,6 +1437,52 @@ static s32 e1000_check_for_copper_link_ich8lan(struct e1000_hw *hw)
if (ret_val)
return ret_val;
+
+ if (hw->mac.type == e1000_pch_spt) {
+ u16 data;
+ u16 ptr_gap;
+
+ if (speed == SPEED_1000) {
+ ret_val = hw->phy.ops.acquire(hw);
+ if (ret_val)
+ return ret_val;
+
+ ret_val = e1e_rphy_locked(hw,
+ PHY_REG(776, 20),
+ &data);
+ if (ret_val) {
+ hw->phy.ops.release(hw);
+ return ret_val;
+ }
+
+ ptr_gap = (data & (0x3FF << 2)) >> 2;
+ if (ptr_gap < 0x18) {
+ data &= ~(0x3FF << 2);
+ data |= (0x18 << 2);
+ ret_val =
+ e1e_wphy_locked(hw,
+ PHY_REG(776, 20),
+ data);
+ }
+ hw->phy.ops.release(hw);
+ if (ret_val)
+ return ret_val;
+ }
+ }
+ }
+
+ /* I217 Packet Loss issue:
+ * ensure that FEXTNVM4 Beacon Duration is set correctly
+ * on power up.
+ * Set the Beacon Duration for I217 to 8 usec
+ */
+ if ((hw->mac.type == e1000_pch_lpt) || (hw->mac.type == e1000_pch_spt)) {
+ u32 mac_reg;
+
+ mac_reg = er32(FEXTNVM4);
+ mac_reg &= ~E1000_FEXTNVM4_BEACON_DURATION_MASK;
+ mac_reg |= E1000_FEXTNVM4_BEACON_DURATION_8USEC;
+ ew32(FEXTNVM4, mac_reg);
}
/* Work-around I218 hang issue */