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ice: Fix for allowing too many MDD events on VF

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Disable VF if any malicious device driver (MDD) event is detected by
hardware. Track vf->num_mdd_events for information about VF MDD events.

Signed-off-by: Michal Swiatkowski <michal.swiatkowski@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Michal Swiatkowski 2019-04-16 10:21:14 -07:00 committed by Jeff Kirsher
parent 819d899863
commit a52db6b260
1 changed files with 8 additions and 7 deletions
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15
drivers/net/ethernet/intel/ice/ice_main.c
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@ -1185,10 +1185,12 @@ static void ice_handle_mdd_event(struct ice_pf *pf)
for (i = 0; i < pf->num_alloc_vfs && mdd_detected; i++) {
struct ice_vf *vf = &pf->vf[i];
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);
vf->num_mdd_events++;
mdd_detected = true;
dev_info(&pf->pdev->dev, "TX driver issue detected on VF %d\n",
i);
}
@ -1196,7 +1198,7 @@ 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);
vf->num_mdd_events++;
mdd_detected = true;
dev_info(&pf->pdev->dev, "TX driver issue detected on VF %d\n",
i);
}
@ -1204,7 +1206,7 @@ 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);
vf->num_mdd_events++;
mdd_detected = true;
dev_info(&pf->pdev->dev, "TX driver issue detected on VF %d\n",
i);
}
@ -1212,14 +1214,13 @@ 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);
vf->num_mdd_events++;
mdd_detected = true;
dev_info(&pf->pdev->dev, "RX driver issue detected on VF %d\n",
i);
}
if (vf->num_mdd_events > ICE_DFLT_NUM_MDD_EVENTS_ALLOWED) {
dev_info(&pf->pdev->dev,
"Too many MDD events on VF %d, disabled\n", i);
if (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);