ice: Add check for lport extraction to LAG init

To fully support initializing the LAG support code, a DDP package that
extracts the logical port from the metadata is required.  If such a
package is not present, there could be difficulties in supporting some
bond types.

Add a check into the initialization flow that will bypass the new paths
if any of the support pieces are missing.

Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Fixes: df006dd4b1dc ("ice: Add initial support framework for LAG")
Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
Reviewed-by: Marcin Szycik <marcin.szycik@linux.intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Sujai Buvaneswaran <sujai.buvaneswaran@intel.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Link: https://lore.kernel.org/r/20240213183957.1483857-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/intel/ice/ice_lag.c b/drivers/net/ethernet/intel/ice/ice_lag.c
index 2a25323..467372d 100644 (file)
--- a/drivers/net/ethernet/intel/ice/ice_lag.c
+++ b/drivers/net/ethernet/intel/ice/ice_lag.c
@@ -151,6 +151,27 @@ ice_lag_find_hw_by_lport(struct ice_lag *lag, u8 lport)
        return NULL;
 }
 
+/**
+ * ice_pkg_has_lport_extract - check if lport extraction supported
+ * @hw: HW struct
+ */
+static bool ice_pkg_has_lport_extract(struct ice_hw *hw)
+{
+       int i;
+
+       for (i = 0; i < hw->blk[ICE_BLK_SW].es.count; i++) {
+               u16 offset;
+               u8 fv_prot;
+
+               ice_find_prot_off(hw, ICE_BLK_SW, ICE_SW_DEFAULT_PROFILE, i,
+                                 &fv_prot, &offset);
+               if (fv_prot == ICE_FV_PROT_MDID &&
+                   offset == ICE_LP_EXT_BUF_OFFSET)
+                       return true;
+       }
+       return false;
+}
+
 /**
  * ice_lag_find_primary - returns pointer to primary interfaces lag struct
  * @lag: local interfaces lag struct
@@ -1206,7 +1227,7 @@ static void ice_lag_del_prune_list(struct ice_lag *lag, struct ice_pf *event_pf)
 }
 
 /**
- * ice_lag_init_feature_support_flag - Check for NVM support for LAG
+ * ice_lag_init_feature_support_flag - Check for package and NVM support for LAG
  * @pf: PF struct
  */
 static void ice_lag_init_feature_support_flag(struct ice_pf *pf)
@@ -1219,7 +1240,7 @@ static void ice_lag_init_feature_support_flag(struct ice_pf *pf)
        else
                ice_clear_feature_support(pf, ICE_F_ROCE_LAG);
 
-       if (caps->sriov_lag)
+       if (caps->sriov_lag && ice_pkg_has_lport_extract(&pf->hw))
                ice_set_feature_support(pf, ICE_F_SRIOV_LAG);
        else
                ice_clear_feature_support(pf, ICE_F_SRIOV_LAG);

diff --git a/drivers/net/ethernet/intel/ice/ice_lag.h b/drivers/net/ethernet/intel/ice/ice_lag.h
index ede833d..183b387 100644 (file)
--- a/drivers/net/ethernet/intel/ice/ice_lag.h
+++ b/drivers/net/ethernet/intel/ice/ice_lag.h
@@ -17,6 +17,9 @@ enum ice_lag_role {
 #define ICE_LAG_INVALID_PORT 0xFF
 
 #define ICE_LAG_RESET_RETRIES          5
+#define ICE_SW_DEFAULT_PROFILE         0
+#define ICE_FV_PROT_MDID               255
+#define ICE_LP_EXT_BUF_OFFSET          32
 
 struct ice_pf;
 struct ice_vf;