diff mbox series

[intel-next,2/2] ice: allow toggling loopback mode via ndo_set_features callback

Message ID 20220707101651.48738-3-maciej.fijalkowski@intel.com (mailing list archive)
State Awaiting Upstream
Delegated to: Netdev Maintainers
Headers show
Series ice: add NETIF_F_LOOPBACK support | expand

Checks

Context Check Description
netdev/tree_selection success Guessed tree name to be net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix warning Target tree name not specified in the subject
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 3 maintainers not CCed: pabeni@redhat.com jesse.brandeburg@intel.com edumazet@google.com
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 51 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Fijalkowski, Maciej July 7, 2022, 10:16 a.m. UTC 
Add support for NETIF_F_LOOPBACK. This feature can be set via:
$ ethtool -K eth0 loopback <on|off>

Feature can be useful for local data path tests.

Acked-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
---
 drivers/net/ethernet/intel/ice/ice_main.c | 33 ++++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

Comments

Kuruvinakunnel, George July 27, 2022, 6:07 p.m. UTC | #1 
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf Of Maciej
> Fijalkowski
> Sent: Thursday, July 7, 2022 3:47 PM
> To: intel-wired-lan@lists.osuosl.org
> Cc: netdev@vger.kernel.org; john.fastabend@gmail.com; Gerasymenko, Anatolii
> <anatolii.gerasymenko@intel.com>; kuba@kernel.org; davem@davemloft.net;
> Karlsson, Magnus <magnus.karlsson@intel.com>
> Subject: [Intel-wired-lan] [PATCH intel-next 2/2] ice: allow toggling loopback mode via
> ndo_set_features callback
> 
> Add support for NETIF_F_LOOPBACK. This feature can be set via:
> $ ethtool -K eth0 loopback <on|off>
> 
> Feature can be useful for local data path tests.
> 
> Acked-by: Jakub Kicinski <kuba@kernel.org>
> Acked-by: John Fastabend <john.fastabend@gmail.com>
> Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
> ---
>  drivers/net/ethernet/intel/ice/ice_main.c | 33 ++++++++++++++++++++++-
>  1 file changed, 32 insertions(+), 1 deletion(-)
> 

Tested-by: George Kuruvinakunnel <george.kuruvinakunnel@intel.com>
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 084f0e17187c..4b08990590ef 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -3358,6 +3358,7 @@  static void ice_set_netdev_features(struct net_device *netdev)
 	netdev->features |= netdev->hw_features;
 
 	netdev->hw_features |= NETIF_F_HW_TC;
+	netdev->hw_features |= NETIF_F_LOOPBACK;
 
 	/* encap and VLAN devices inherit default, csumo and tso features */
 	netdev->hw_enc_features |= dflt_features | csumo_features |
@@ -5915,6 +5916,33 @@  ice_set_vlan_features(struct net_device *netdev, netdev_features_t features)
 	return 0;
 }
 
+/**
+ * ice_set_loopback - turn on/off loopback mode on underlying PF
+ * @vsi: ptr to VSI
+ * @ena: flag to indicate the on/off setting
+ */
+static int
+ice_set_loopback(struct ice_vsi *vsi, bool ena)
+{
+	bool if_running = netif_running(vsi->netdev);
+	int ret;
+
+	if (if_running && !test_and_set_bit(ICE_VSI_DOWN, vsi->state)) {
+		ret = ice_down(vsi);
+		if (ret) {
+			netdev_err(vsi->netdev, "Preparing device to toggle loopback failed\n");
+			return ret;
+		}
+	}
+	ret = ice_aq_set_mac_loopback(&vsi->back->hw, ena, NULL);
+	if (ret)
+		netdev_err(vsi->netdev, "Failed to toggle loopback state\n");
+	if (if_running)
+		ret = ice_up(vsi);
+
+	return ret;
+}
+
 /**
  * ice_set_features - set the netdev feature flags
  * @netdev: ptr to the netdev being adjusted
@@ -5973,7 +6001,10 @@  ice_set_features(struct net_device *netdev, netdev_features_t features)
 		      clear_bit(ICE_FLAG_CLS_FLOWER, pf->flags);
 	}
 
-	return 0;
+	if (changed & NETIF_F_LOOPBACK)
+		ret = ice_set_loopback(vsi, !!(features & NETIF_F_LOOPBACK));
+
+	return ret;
 }
 
 /**