i40e: Add code to handle FD table full condition
Add code to enforce the following policy:
- If the HW reports filter programming error, we check if it's due to a
full table.
- If so, we go ahead and turn off new rule addition for ATR and then SB
in that order.
- We monitor the programmed filter count, if enough room is created due
to filter deletion/reset, we then re-enable SB and ATR new rule addition.
Change-ID: I69d24b29e5c45bc4fa861258e11c2fa7b8868748
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Catherine Sullivan <catherine.sullivan@intel.com>
Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
index 718a3e0..8ee224f 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
@@ -1460,6 +1460,7 @@
ret = i40e_update_ethtool_fdir_entry(vsi, NULL, fsp->location, cmd);
+ i40e_fdir_check_and_reenable(pf);
return ret;
}
@@ -1483,9 +1484,16 @@
if (!vsi)
return -EINVAL;
- fsp = (struct ethtool_rx_flow_spec *)&cmd->fs;
pf = vsi->back;
+ if (!(pf->flags & I40E_FLAG_FD_SB_ENABLED))
+ return -EOPNOTSUPP;
+
+ if (add && (pf->auto_disable_flags & I40E_FLAG_FD_SB_ENABLED))
+ return -ENOSPC;
+
+ fsp = (struct ethtool_rx_flow_spec *)&cmd->fs;
+
if (fsp->location >= (pf->hw.func_caps.fd_filters_best_effort +
pf->hw.func_caps.fd_filters_guaranteed)) {
return -EINVAL;