From: PJ Waskiewicz <peter.p.waskiewicz.jr@intel.com>

When changing DCB parameters, ixgbe needs to have the MAC reset.  The way
the flow control code is setup today, PFC will be disabled on a reset.
This patch adds a new flow control type for PFC, and then has the netlink
layer take care of toggling which type of flow control to enable.

Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

 drivers/net/ixgbe/ixgbe_common.c    |   23 +++++++++++++++++++++--
 drivers/net/ixgbe/ixgbe_dcb_82598.c |    1 -
 drivers/net/ixgbe/ixgbe_dcb_82599.c |    3 ---
 drivers/net/ixgbe/ixgbe_dcb_nl.c    |    2 ++
 drivers/net/ixgbe/ixgbe_type.h      |    3 +++
 5 files changed, 26 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_common.c b/drivers/net/ixgbe/ixgbe_common.c
index 245db0e..8cfd3fd 100644
--- a/drivers/net/ixgbe/ixgbe_common.c
+++ b/drivers/net/ixgbe/ixgbe_common.c
@@ -1654,9 +1654,10 @@ s32 ixgbe_fc_enable(struct ixgbe_hw *hw, s32 packetbuf_num)
 	 * 0: Flow control is completely disabled
 	 * 1: Rx flow control is enabled (we can receive pause frames,
 	 *    but not send pause frames).
-	 * 2:  Tx flow control is enabled (we can send pause frames but
-	 *     we do not support receiving pause frames).
+	 * 2: Tx flow control is enabled (we can send pause frames but
+	 *    we do not support receiving pause frames).
 	 * 3: Both Rx and Tx flow control (symmetric) are enabled.
+	 * 4: Priority Flow Control is enabled.
 	 * other: Invalid.
 	 */
 	switch (hw->fc.current_mode) {
@@ -1686,6 +1687,11 @@ s32 ixgbe_fc_enable(struct ixgbe_hw *hw, s32 packetbuf_num)
 		mflcn_reg |= IXGBE_MFLCN_RFCE;
 		fccfg_reg |= IXGBE_FCCFG_TFCE_802_3X;
 		break;
+#ifdef CONFIG_DCB
+	case ixgbe_fc_pfc:
+		goto out;
+		break;
+#endif
 	default:
 		hw_dbg(hw, "Flow control param set incorrectly\n");
 		ret_val = -IXGBE_ERR_CONFIG;
@@ -1746,6 +1752,7 @@ s32 ixgbe_fc_autoneg(struct ixgbe_hw ...
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From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Applied.

--

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