Merge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-queue

Jeff Kirsher says:

====================
Intel Wired LAN Driver Updates 2020-02-19

This series contains fixes to the ice driver.

Brett fixes an issue where if a user sets an odd [tx|rx]-usecs value
through ethtool, the request is denied because the hardware is set to
have an ITR with 2us granularity.  Also fix an issue where the VF has
not been completely removed/reset after being unbound from the host
driver, so resolve this by waiting for the VF remove/reset process to
happen before checking if the VF is disabled.

Michal fixes an issue, where when the user changes flow control via
ethtool, the OS is told the link is going down when that may not be the
case.  Before the fix, the only way to get out of this state was to take
the interface down and up again.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 38 insertions, 18 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool.c b/drivers/net/ethernet/intel/ice/ice_ethtool.c
index b002ab4e5838..77c412a7e7a4 100644
--- a/drivers/net/ethernet/intel/ice/ice_ethtool.c
+++ b/drivers/net/ethernet/intel/ice/ice_ethtool.c
@@ -2936,13 +2936,6 @@ ice_set_pauseparam(struct net_device *netdev, struct ethtool_pauseparam *pause)
 	else
 		return -EINVAL;
 
-	/* Tell the OS link is going down, the link will go back up when fw
-	 * says it is ready asynchronously
-	 */
-	ice_print_link_msg(vsi, false);
-	netif_carrier_off(netdev);
-	netif_tx_stop_all_queues(netdev);
-
 	/* Set the FC mode and only restart AN if link is up */
 	status = ice_set_fc(pi, &aq_failures, link_up);
 
@@ -3489,21 +3482,13 @@ ice_set_rc_coalesce(enum ice_container_type c_type, struct ethtool_coalesce *ec,
 		return -EINVAL;
 	}
 
-	/* hardware only supports an ITR granularity of 2us */
-	if (coalesce_usecs % 2 != 0) {
-		netdev_info(vsi->netdev, "Invalid value, %s-usecs must be even\n",
-			    c_type_str);
-		return -EINVAL;
-	}
-
 	if (use_adaptive_coalesce) {
 		rc->itr_setting |= ICE_ITR_DYNAMIC;
 	} else {
-		/* store user facing value how it was set */
+		/* save the user set usecs */
 		rc->itr_setting = coalesce_usecs;
-		/* set to static and convert to value HW understands */
-		rc->target_itr =
-			ITR_TO_REG(ITR_REG_ALIGN(rc->itr_setting));
+		/* device ITR granularity is in 2 usec increments */
+		rc->target_itr = ITR_REG_ALIGN(rc->itr_setting);
 	}
 
 	return 0;
@@ -3597,6 +3582,30 @@ ice_is_coalesce_param_invalid(struct net_device *netdev,
 }
 
 /**
+ * ice_print_if_odd_usecs - print message if user tries to set odd [tx|rx]-usecs
+ * @netdev: netdev used for print
+ * @itr_setting: previous user setting
+ * @use_adaptive_coalesce: if adaptive coalesce is enabled or being enabled
+ * @coalesce_usecs: requested value of [tx|rx]-usecs
+ * @c_type_str: either "rx" or "tx" to match user set field of [tx|rx]-usecs
+ */
+static void
+ice_print_if_odd_usecs(struct net_device *netdev, u16 itr_setting,
+		       u32 use_adaptive_coalesce, u32 coalesce_usecs,
+		       const char *c_type_str)
+{
+	if (use_adaptive_coalesce)
+		return;
+
+	itr_setting = ITR_TO_REG(itr_setting);
+
+	if (itr_setting != coalesce_usecs && (coalesce_usecs % 2))
+		netdev_info(netdev, "User set %s-usecs to %d, device only supports even values. Rounding down and attempting to set %s-usecs to %d\n",
+			    c_type_str, coalesce_usecs, c_type_str,
+			    ITR_REG_ALIGN(coalesce_usecs));
+}
+
+/**
  * __ice_set_coalesce - set ITR/INTRL values for the device
  * @netdev: pointer to the netdev associated with this query
  * @ec: ethtool structure to fill with driver's coalesce settings
@@ -3616,8 +3625,19 @@ __ice_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *ec,
 		return -EINVAL;
 
 	if (q_num < 0) {
+		struct ice_q_vector *q_vector = vsi->q_vectors[0];
 		int v_idx;
 
+		if (q_vector) {
+			ice_print_if_odd_usecs(netdev, q_vector->rx.itr_setting,
+					       ec->use_adaptive_rx_coalesce,
+					       ec->rx_coalesce_usecs, "rx");
+
+			ice_print_if_odd_usecs(netdev, q_vector->tx.itr_setting,
+					       ec->use_adaptive_tx_coalesce,
+					       ec->tx_coalesce_usecs, "tx");
+		}
+
 		ice_for_each_q_vector(vsi, v_idx) {
 			/* In some cases if DCB is configured the num_[rx|tx]q
 			 * can be less than vsi->num_q_vectors. This check