[PATCH net 1/2] nfp: flower: replace CFI with vlan present

[Jakub Kicinski]

From: Pieter Jansen van Vuuren <pieter.jansenvanvuu...@netronome.com>

Replace vlan CFI bit with a vlan present bit that indicates the
presence of a vlan tag. Previously the driver incorrectly assumed
that an vlan id of 0 is not matchable, therefore we indicate vlan
presence with a vlan present bit.

Fixes: 5571e8c9f241 ("nfp: extend flower matching capabilities")
Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuu...@netronome.com>
Signed-off-by: Louis Peens <louis.pe...@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicin...@netronome.com>
---
 .../net/ethernet/netronome/nfp/flower/cmsg.h  |  2 +-
 .../net/ethernet/netronome/nfp/flower/match.c | 27 +++++++++----------
 2 files changed, 14 insertions(+), 15 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/flower/cmsg.h 
b/drivers/net/ethernet/netronome/nfp/flower/cmsg.h
index 4fcaf11ed56e..08ed777b86d2 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/cmsg.h
+++ b/drivers/net/ethernet/netronome/nfp/flower/cmsg.h
@@ -26,7 +26,7 @@
 #define NFP_FLOWER_LAYER2_GENEVE_OP    BIT(6)
 
 #define NFP_FLOWER_MASK_VLAN_PRIO      GENMASK(15, 13)
-#define NFP_FLOWER_MASK_VLAN_CFI       BIT(12)
+#define NFP_FLOWER_MASK_VLAN_PRESENT   BIT(12)
 #define NFP_FLOWER_MASK_VLAN_VID       GENMASK(11, 0)
 
 #define NFP_FLOWER_MASK_MPLS_LB                GENMASK(31, 12)
diff --git a/drivers/net/ethernet/netronome/nfp/flower/match.c 
b/drivers/net/ethernet/netronome/nfp/flower/match.c
index e03c8ef2c28c..9b8b843d0340 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/match.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/match.c
@@ -30,20 +30,19 @@ nfp_flower_compile_meta_tci(struct nfp_flower_meta_tci *ext,
 
                flow_rule_match_vlan(rule, &match);
                /* Populate the tci field. */
-               if (match.key->vlan_id || match.key->vlan_priority) {
-                       tmp_tci = FIELD_PREP(NFP_FLOWER_MASK_VLAN_PRIO,
-                                            match.key->vlan_priority) |
-                                 FIELD_PREP(NFP_FLOWER_MASK_VLAN_VID,
-                                            match.key->vlan_id) |
-                                 NFP_FLOWER_MASK_VLAN_CFI;
-                       ext->tci = cpu_to_be16(tmp_tci);
-                       tmp_tci = FIELD_PREP(NFP_FLOWER_MASK_VLAN_PRIO,
-                                            match.mask->vlan_priority) |
-                                 FIELD_PREP(NFP_FLOWER_MASK_VLAN_VID,
-                                            match.mask->vlan_id) |
-                                 NFP_FLOWER_MASK_VLAN_CFI;
-                       msk->tci = cpu_to_be16(tmp_tci);
-               }
+               tmp_tci = NFP_FLOWER_MASK_VLAN_PRESENT;
+               tmp_tci |= FIELD_PREP(NFP_FLOWER_MASK_VLAN_PRIO,
+                                     match.key->vlan_priority) |
+                          FIELD_PREP(NFP_FLOWER_MASK_VLAN_VID,
+                                     match.key->vlan_id);
+               ext->tci = cpu_to_be16(tmp_tci);
+
+               tmp_tci = NFP_FLOWER_MASK_VLAN_PRESENT;
+               tmp_tci |= FIELD_PREP(NFP_FLOWER_MASK_VLAN_PRIO,
+                                     match.mask->vlan_priority) |
+                          FIELD_PREP(NFP_FLOWER_MASK_VLAN_VID,
+                                     match.mask->vlan_id);
+               msk->tci = cpu_to_be16(tmp_tci);
        }
 }
 
-- 
2.21.0