i40e: FD filters flush policy changes
Since GLQF_FDCNT_0 register now has the right offset, use it to simplify our
FD flush flow.
If the filter add error happens to be for SB we just auto disable SB.
If filter error happens to be for ATR, auto disable ATR and mark
the state to FD_FLUSH_REQUESTED. Which gets cleared when flush completes.
If we are entering flush too quickly (< 30 seconds) and we have quite
a few SB rules, its time to disable ATR for good. Since SB + ATR rules
is most likely making the FD table unstable.
ATR can be re-enabled by turning ntuple off (ethtool -K ntuple off)
and will remain off after turning ntuple on till it gets unstable again.
Change-ID: I2154a2e0a5d44851a2f0eb8731e2f1d4a4d1acbc
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index 4fb258a..f01cdbf 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -175,6 +175,7 @@
#define I40E_FDIR_MAX_RAW_PACKET_SIZE 512
#define I40E_FDIR_BUFFER_FULL_MARGIN 10
#define I40E_FDIR_BUFFER_HEAD_ROOM 32
+#define I40E_FDIR_BUFFER_HEAD_ROOM_FOR_ATR (I40E_FDIR_BUFFER_HEAD_ROOM * 4)
enum i40e_fd_stat_idx {
I40E_FD_STAT_ATR,
@@ -636,9 +637,10 @@
int i40e_add_del_fdir(struct i40e_vsi *vsi,
struct i40e_fdir_filter *input, bool add);
void i40e_fdir_check_and_reenable(struct i40e_pf *pf);
-int i40e_get_current_fd_count(struct i40e_pf *pf);
-int i40e_get_cur_guaranteed_fd_count(struct i40e_pf *pf);
-int i40e_get_current_atr_cnt(struct i40e_pf *pf);
+u32 i40e_get_current_fd_count(struct i40e_pf *pf);
+u32 i40e_get_cur_guaranteed_fd_count(struct i40e_pf *pf);
+u32 i40e_get_current_atr_cnt(struct i40e_pf *pf);
+u32 i40e_get_global_fd_count(struct i40e_pf *pf);
bool i40e_set_ntuple(struct i40e_pf *pf, netdev_features_t features);
void i40e_set_ethtool_ops(struct net_device *netdev);
struct i40e_mac_filter *i40e_add_filter(struct i40e_vsi *vsi,