diff mbox series

[S20,08/15] ice: Check all VFs for MDD activity, don't disable

Message ID 20190416173052.28928-9-anirudh.venkataramanan@intel.com
State Accepted
Delegated to: Jeff Kirsher
Headers show
Series Fixes and feature updates for ice | expand

Commit Message

Anirudh Venkataramanan April 16, 2019, 5:30 p.m. UTC 
From: Mitch Williams <mitch.a.williams@intel.com>

Don't use the mdd_detected variable as an exit condition for this loop;
the first VF to NOT have an MDD event will cause the loop to terminate.

Instead just look at all of the VFs, but don't disable them. This
prevents proper release of resources if the VFs are rebooted or the VF
driver reloaded. Instead, just log a message and call out repeat
offenders.

To make it clear what we are doing, use a differently-named variable in
the loop.

Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
---
 drivers/net/ethernet/intel/ice/ice_main.c | 23 +++++++++++------------
 1 file changed, 11 insertions(+), 12 deletions(-)

Comments

Bowers, AndrewX April 29, 2019, 6:15 p.m. UTC | #1 
> -----Original Message-----
> From: Intel-wired-lan [mailto:intel-wired-lan-bounces@osuosl.org] On
> Behalf Of Anirudh Venkataramanan
> Sent: Tuesday, April 16, 2019 10:31 AM
> To: intel-wired-lan@lists.osuosl.org
> Subject: [Intel-wired-lan] [PATCH S20 08/15] ice: Check all VFs for MDD
> activity, don't disable
> 
> From: Mitch Williams <mitch.a.williams@intel.com>
> 
> Don't use the mdd_detected variable as an exit condition for this loop; the
> first VF to NOT have an MDD event will cause the loop to terminate.
> 
> Instead just look at all of the VFs, but don't disable them. This prevents
> proper release of resources if the VFs are rebooted or the VF driver
> reloaded. Instead, just log a message and call out repeat offenders.
> 
> To make it clear what we are doing, use a differently-named variable in the
> loop.
> 
> Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
> Signed-off-by: Anirudh Venkataramanan
> <anirudh.venkataramanan@intel.com>
> ---
>  drivers/net/ethernet/intel/ice/ice_main.c | 23 +++++++++++------------
>  1 file changed, 11 insertions(+), 12 deletions(-)

Tested-by: Andrew Bowers <andrewx.bowers@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 6fc4d8176d14..59971f6224f1 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -1161,16 +1161,16 @@  static void ice_handle_mdd_event(struct ice_pf *pf)
 		}
 	}
 
-	/* see if one of the VFs needs to be reset */
-	for (i = 0; i < pf->num_alloc_vfs && mdd_detected; i++) {
+	/* check to see if one of the VFs caused the MDD */
+	for (i = 0; i < pf->num_alloc_vfs; i++) {
 		struct ice_vf *vf = &pf->vf[i];
 
-		mdd_detected = false;
+		bool vf_mdd_detected = false;
 
 		reg = rd32(hw, VP_MDET_TX_PQM(i));
 		if (reg & VP_MDET_TX_PQM_VALID_M) {
 			wr32(hw, VP_MDET_TX_PQM(i), 0xFFFF);
-			mdd_detected = true;
+			vf_mdd_detected = true;
 			dev_info(&pf->pdev->dev, "TX driver issue detected on VF %d\n",
 				 i);
 		}
@@ -1178,7 +1178,7 @@  static void ice_handle_mdd_event(struct ice_pf *pf)
 		reg = rd32(hw, VP_MDET_TX_TCLAN(i));
 		if (reg & VP_MDET_TX_TCLAN_VALID_M) {
 			wr32(hw, VP_MDET_TX_TCLAN(i), 0xFFFF);
-			mdd_detected = true;
+			vf_mdd_detected = true;
 			dev_info(&pf->pdev->dev, "TX driver issue detected on VF %d\n",
 				 i);
 		}
@@ -1186,7 +1186,7 @@  static void ice_handle_mdd_event(struct ice_pf *pf)
 		reg = rd32(hw, VP_MDET_TX_TDPU(i));
 		if (reg & VP_MDET_TX_TDPU_VALID_M) {
 			wr32(hw, VP_MDET_TX_TDPU(i), 0xFFFF);
-			mdd_detected = true;
+			vf_mdd_detected = true;
 			dev_info(&pf->pdev->dev, "TX driver issue detected on VF %d\n",
 				 i);
 		}
@@ -1194,19 +1194,18 @@  static void ice_handle_mdd_event(struct ice_pf *pf)
 		reg = rd32(hw, VP_MDET_RX(i));
 		if (reg & VP_MDET_RX_VALID_M) {
 			wr32(hw, VP_MDET_RX(i), 0xFFFF);
-			mdd_detected = true;
+			vf_mdd_detected = true;
 			dev_info(&pf->pdev->dev, "RX driver issue detected on VF %d\n",
 				 i);
 		}
 
-		if (mdd_detected) {
+		if (vf_mdd_detected) {
 			vf->num_mdd_events++;
-			dev_info(&pf->pdev->dev,
-				 "Use PF Control I/F to re-enable the VF\n");
-			set_bit(ICE_VF_STATE_DIS, vf->vf_states);
+			if (vf->num_mdd_events > 1)
+				dev_info(&pf->pdev->dev, "VF %d has had %llu MDD events since last boot\n",
+					 i, vf->num_mdd_events);
 		}
 	}
-
 }
 
 /**