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authorJohn Fastabend <john.r.fastabend@intel.com>2011-09-21 14:44:10 +0000
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2011-10-06 03:24:10 -0700
commit6b8456c0199c4dd35bb7a04ff299ab925699e390 (patch)
treefd3e66106def234199f0b1f8d236e55784c0d050
parent4de2a0224ae3c437e8a090b6ec8d304a7edff049 (diff)
ixgbe: X540 devices RX PFC frames pause traffic even if disabled
Receiving PFC (priority flow control) frames while the feature is off should not pause the traffic class. On the X540 devices the traffic class react to frames if it was previously enabled because the field is incorrectly cleared. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Tested-by: Ross Brattain <ross.b.brattain@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
-rw-r--r--drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_82599.c12
-rw-r--r--drivers/net/ethernet/intel/ixgbe/ixgbe_type.h2
2 files changed, 12 insertions, 2 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_82599.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_82599.c
index 45fe71030455..32cd97bc794d 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_82599.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_82599.c
@@ -271,13 +271,23 @@ s32 ixgbe_dcb_config_pfc_82599(struct ixgbe_hw *hw, u8 pfc_en, u8 *prio_tc)
reg |= IXGBE_MFLCN_RPFCE | IXGBE_MFLCN_DPF;
if (hw->mac.type == ixgbe_mac_X540) {
- reg &= ~(IXGBE_MFLCN_RPFCE_MASK | 0x10);
+ reg &= ~IXGBE_MFLCN_RPFCE_MASK;
reg |= pfc_en << IXGBE_MFLCN_RPFCE_SHIFT;
}
IXGBE_WRITE_REG(hw, IXGBE_MFLCN, reg);
} else {
+ /* X540 devices have a RX bit that should be cleared
+ * if PFC is disabled on all TCs but PFC features is
+ * enabled.
+ */
+ if (hw->mac.type == ixgbe_mac_X540) {
+ reg = IXGBE_READ_REG(hw, IXGBE_MFLCN);
+ reg &= ~IXGBE_MFLCN_RPFCE_MASK;
+ IXGBE_WRITE_REG(hw, IXGBE_MFLCN, reg);
+ }
+
for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
hw->mac.ops.fc_enable(hw, i);
}
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
index 4ea909c7951b..d1d689471523 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
@@ -1850,7 +1850,7 @@ enum {
#define IXGBE_MFLCN_DPF 0x00000002 /* Discard Pause Frame */
#define IXGBE_MFLCN_RPFCE 0x00000004 /* Receive Priority FC Enable */
#define IXGBE_MFLCN_RFCE 0x00000008 /* Receive FC Enable */
-#define IXGBE_MFLCN_RPFCE_MASK 0x00000FE0 /* Receive FC Mask */
+#define IXGBE_MFLCN_RPFCE_MASK 0x00000FF0 /* Receive FC Mask */
#define IXGBE_MFLCN_RPFCE_SHIFT 4