ixgbe: cleanup reset paths
The reset paths are overly complicated and are either missing steps or
contain extra unnecessary steps such as reading MAC address twice. This
change is meant to help clean up the reset paths an get things functioning
correctly.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
index f193fc2..a5ff435 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
@@ -904,11 +904,10 @@
**/
static s32 ixgbe_reset_hw_82599(struct ixgbe_hw *hw)
{
- s32 status = 0;
- u32 ctrl;
- u32 i;
- u32 autoc;
- u32 autoc2;
+ ixgbe_link_speed link_speed;
+ s32 status;
+ u32 ctrl, i, autoc, autoc2;
+ bool link_up = false;
/* Call adapter stop to disable tx/rx and clear interrupts */
hw->mac.ops.stop_adapter(hw);
@@ -942,40 +941,47 @@
mac_reset_top:
/*
- * Issue global reset to the MAC. This needs to be a SW reset.
- * If link reset is used, it might reset the MAC when mng is using it
+ * Issue global reset to the MAC. Needs to be SW reset if link is up.
+ * If link reset is used when link is up, it might reset the PHY when
+ * mng is using it. If link is down or the flag to force full link
+ * reset is set, then perform link reset.
*/
- ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
- IXGBE_WRITE_REG(hw, IXGBE_CTRL, (ctrl | IXGBE_CTRL_RST));
+ ctrl = IXGBE_CTRL_LNK_RST;
+ if (!hw->force_full_reset) {
+ hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
+ if (link_up)
+ ctrl = IXGBE_CTRL_RST;
+ }
+
+ ctrl |= IXGBE_READ_REG(hw, IXGBE_CTRL);
+ IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
IXGBE_WRITE_FLUSH(hw);
/* Poll for reset bit to self-clear indicating reset is complete */
for (i = 0; i < 10; i++) {
udelay(1);
ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
- if (!(ctrl & IXGBE_CTRL_RST))
+ if (!(ctrl & IXGBE_CTRL_RST_MASK))
break;
}
- if (ctrl & IXGBE_CTRL_RST) {
+
+ if (ctrl & IXGBE_CTRL_RST_MASK) {
status = IXGBE_ERR_RESET_FAILED;
hw_dbg(hw, "Reset polling failed to complete.\n");
}
+ msleep(50);
+
/*
* Double resets are required for recovery from certain error
* conditions. Between resets, it is necessary to stall to allow time
- * for any pending HW events to complete. We use 1usec since that is
- * what is needed for ixgbe_disable_pcie_master(). The second reset
- * then clears out any effects of those events.
+ * for any pending HW events to complete.
*/
if (hw->mac.flags & IXGBE_FLAGS_DOUBLE_RESET_REQUIRED) {
hw->mac.flags &= ~IXGBE_FLAGS_DOUBLE_RESET_REQUIRED;
- udelay(1);
goto mac_reset_top;
}
- msleep(50);
-
/*
* Store the original AUTOC/AUTOC2 values if they have not been
* stored off yet. Otherwise restore the stored original