mlxsw: spectrum_acl: Start using A-TCAM

Now that all the pieces are in place we can start using the A-TCAM
instead of only using the C-TCAM. This allows for much higher scale and
better performance (to be improved further by follow-up patch sets).

Perform the integration with the A-TCAM and the eRP core by reverting
the changes introduced by "mlxsw: spectrum_acl: Enable C-TCAM only mode
in eRP core" and add calls from the C-TCAM code into the eRP core.
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Reviewed-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/reg.h

@@ -2868,7 +2868,6 @@ static inline void mlxsw_reg_percr_pack(char *payload, u16 region_id)
 	mlxsw_reg_percr_atcam_ignore_prune_set(payload, false);
 	mlxsw_reg_percr_ctcam_ignore_prune_set(payload, false);
 	mlxsw_reg_percr_bf_bypass_set(payload, true);
-	memset(payload + 0x20, 0xff, 96);
 }
 
 /* PERERP - Policy-Engine Region eRP Register

drivers/net/ethernet/mellanox/mlxsw/spectrum1_acl_tcam.c

@@ -58,6 +58,26 @@ struct mlxsw_sp1_acl_tcam_entry {
 	struct mlxsw_sp_acl_ctcam_entry centry;
 };
 
+static int
+mlxsw_sp1_acl_ctcam_region_entry_insert(struct mlxsw_sp_acl_ctcam_region *cregion,
+					struct mlxsw_sp_acl_ctcam_entry *centry,
+					const char *mask)
+{
+	return 0;
+}
+
+static void
+mlxsw_sp1_acl_ctcam_region_entry_remove(struct mlxsw_sp_acl_ctcam_region *cregion,
+					struct mlxsw_sp_acl_ctcam_entry *centry)
+{
+}
+
+static const struct mlxsw_sp_acl_ctcam_region_ops
+mlxsw_sp1_acl_ctcam_region_ops = {
+	.entry_insert = mlxsw_sp1_acl_ctcam_region_entry_insert,
+	.entry_remove = mlxsw_sp1_acl_ctcam_region_entry_remove,
+};
+
 static int mlxsw_sp1_acl_tcam_init(struct mlxsw_sp *mlxsw_sp, void *priv,
 				   struct mlxsw_sp_acl_tcam *tcam)
 {
@@ -129,7 +149,8 @@ mlxsw_sp1_acl_tcam_region_init(struct mlxsw_sp *mlxsw_sp, void *region_priv,
 	int err;
 
 	err = mlxsw_sp_acl_ctcam_region_init(mlxsw_sp, &region->cregion,
-					     _region);
+					     _region,
+					     &mlxsw_sp1_acl_ctcam_region_ops);
 	if (err)
 		return err;
 	err = mlxsw_sp1_acl_ctcam_region_catchall_add(mlxsw_sp, region);

drivers/net/ethernet/mellanox/mlxsw/spectrum2_acl_tcam.c

@@ -50,7 +50,7 @@ struct mlxsw_sp2_acl_tcam_region {
 };
 
 struct mlxsw_sp2_acl_tcam_chunk {
-	struct mlxsw_sp_acl_ctcam_chunk cchunk;
+	struct mlxsw_sp_acl_atcam_chunk achunk;
 };
 
 struct mlxsw_sp2_acl_tcam_entry {
@@ -58,6 +58,45 @@ struct mlxsw_sp2_acl_tcam_entry {
 	struct mlxsw_afa_block *act_block;
 };
 
+static int
+mlxsw_sp2_acl_ctcam_region_entry_insert(struct mlxsw_sp_acl_ctcam_region *cregion,
+					struct mlxsw_sp_acl_ctcam_entry *centry,
+					const char *mask)
+{
+	struct mlxsw_sp_acl_atcam_region *aregion;
+	struct mlxsw_sp_acl_atcam_entry *aentry;
+	struct mlxsw_sp_acl_erp *erp;
+
+	aregion = mlxsw_sp_acl_tcam_cregion_aregion(cregion);
+	aentry = mlxsw_sp_acl_tcam_centry_aentry(centry);
+
+	erp = mlxsw_sp_acl_erp_get(aregion, mask, true);
+	if (IS_ERR(erp))
+		return PTR_ERR(erp);
+	aentry->erp = erp;
+
+	return 0;
+}
+
+static void
+mlxsw_sp2_acl_ctcam_region_entry_remove(struct mlxsw_sp_acl_ctcam_region *cregion,
+					struct mlxsw_sp_acl_ctcam_entry *centry)
+{
+	struct mlxsw_sp_acl_atcam_region *aregion;
+	struct mlxsw_sp_acl_atcam_entry *aentry;
+
+	aregion = mlxsw_sp_acl_tcam_cregion_aregion(cregion);
+	aentry = mlxsw_sp_acl_tcam_centry_aentry(centry);
+
+	mlxsw_sp_acl_erp_put(aregion, aentry->erp);
+}
+
+static const struct mlxsw_sp_acl_ctcam_region_ops
+mlxsw_sp2_acl_ctcam_region_ops = {
+	.entry_insert = mlxsw_sp2_acl_ctcam_region_entry_insert,
+	.entry_remove = mlxsw_sp2_acl_ctcam_region_entry_remove,
+};
+
 static int mlxsw_sp2_acl_tcam_init(struct mlxsw_sp *mlxsw_sp, void *priv,
 				   struct mlxsw_sp_acl_tcam *_tcam)
 {
@@ -139,7 +178,8 @@ mlxsw_sp2_acl_tcam_region_init(struct mlxsw_sp *mlxsw_sp, void *region_priv,
 	region->region = _region;
 
 	return mlxsw_sp_acl_atcam_region_init(mlxsw_sp, &tcam->atcam,
-					      &region->aregion, _region);
+					      &region->aregion, _region,
+					      &mlxsw_sp2_acl_ctcam_region_ops);
 }
 
 static void
@@ -163,7 +203,7 @@ static void mlxsw_sp2_acl_tcam_chunk_init(void *region_priv, void *chunk_priv,
 	struct mlxsw_sp2_acl_tcam_region *region = region_priv;
 	struct mlxsw_sp2_acl_tcam_chunk *chunk = chunk_priv;
 
-	mlxsw_sp_acl_ctcam_chunk_init(&region->aregion.cregion, &chunk->cchunk,
+	mlxsw_sp_acl_atcam_chunk_init(&region->aregion, &chunk->achunk,
 				      priority);
 }
 
@@ -171,7 +211,7 @@ static void mlxsw_sp2_acl_tcam_chunk_fini(void *chunk_priv)
 {
 	struct mlxsw_sp2_acl_tcam_chunk *chunk = chunk_priv;
 
-	mlxsw_sp_acl_ctcam_chunk_fini(&chunk->cchunk);
+	mlxsw_sp_acl_atcam_chunk_fini(&chunk->achunk);
 }
 
 static int mlxsw_sp2_acl_tcam_entry_add(struct mlxsw_sp *mlxsw_sp,
@@ -184,9 +224,9 @@ static int mlxsw_sp2_acl_tcam_entry_add(struct mlxsw_sp *mlxsw_sp,
 	struct mlxsw_sp2_acl_tcam_entry *entry = entry_priv;
 
 	entry->act_block = rulei->act_block;
-	return mlxsw_sp_acl_ctcam_entry_add(mlxsw_sp, &region->aregion.cregion,
-					    &chunk->cchunk,
-					    &entry->aentry.centry, rulei, true);
+	return mlxsw_sp_acl_atcam_entry_add(mlxsw_sp, &region->aregion,
+					    &chunk->achunk, &entry->aentry,
+					    rulei);
 }
 
 static void mlxsw_sp2_acl_tcam_entry_del(struct mlxsw_sp *mlxsw_sp,
@@ -197,8 +237,8 @@ static void mlxsw_sp2_acl_tcam_entry_del(struct mlxsw_sp *mlxsw_sp,
 	struct mlxsw_sp2_acl_tcam_chunk *chunk = chunk_priv;
 	struct mlxsw_sp2_acl_tcam_entry *entry = entry_priv;
 
-	mlxsw_sp_acl_ctcam_entry_del(mlxsw_sp, &region->aregion.cregion,
-				     &chunk->cchunk, &entry->aentry.centry);
+	mlxsw_sp_acl_atcam_entry_del(mlxsw_sp, &region->aregion, &chunk->achunk,
+				     &entry->aentry);
 }
 
 static int

drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_atcam.c

@@ -344,10 +344,12 @@ mlxsw_sp_acl_atcam_region_type_init(struct mlxsw_sp_acl_atcam_region *aregion)
 	aregion->ops = mlxsw_sp_acl_atcam_region_ops_arr[region_type];
 }
 
-int mlxsw_sp_acl_atcam_region_init(struct mlxsw_sp *mlxsw_sp,
-				   struct mlxsw_sp_acl_atcam *atcam,
-				   struct mlxsw_sp_acl_atcam_region *aregion,
-				   struct mlxsw_sp_acl_tcam_region *region)
+int
+mlxsw_sp_acl_atcam_region_init(struct mlxsw_sp *mlxsw_sp,
+			       struct mlxsw_sp_acl_atcam *atcam,
+			       struct mlxsw_sp_acl_atcam_region *aregion,
+			       struct mlxsw_sp_acl_tcam_region *region,
+			       const struct mlxsw_sp_acl_ctcam_region_ops *ops)
 {
 	int err;
 
@@ -366,7 +368,7 @@ int mlxsw_sp_acl_atcam_region_init(struct mlxsw_sp *mlxsw_sp,
 	if (err)
 		goto err_erp_region_init;
 	err = mlxsw_sp_acl_ctcam_region_init(mlxsw_sp, &aregion->cregion,
-					     region);
+					     region, ops);
 	if (err)
 		goto err_ctcam_region_init;
 

drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_ctcam.c

@@ -98,6 +98,10 @@ mlxsw_sp_acl_ctcam_region_entry_insert(struct mlxsw_sp *mlxsw_sp,
 	mlxsw_afk_encode(afk, region->key_info, &rulei->values, key, mask, 0,
 			 blocks_count - 1);
 
+	err = cregion->ops->entry_insert(cregion, centry, mask);
+	if (err)
+		return err;
+
 	/* Only the first action set belongs here, the rest is in KVD */
 	act_set = mlxsw_afa_block_first_set(rulei->act_block);
 	mlxsw_reg_ptce2_flex_action_set_memcpy_to(ptce2_pl, act_set);
@@ -116,6 +120,7 @@ mlxsw_sp_acl_ctcam_region_entry_remove(struct mlxsw_sp *mlxsw_sp,
 			     cregion->region->tcam_region_info,
 			     centry->parman_item.index, 0);
 	mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ptce2), ptce2_pl);
+	cregion->ops->entry_remove(cregion, centry);
 }
 
 static int mlxsw_sp_acl_ctcam_region_parman_resize(void *priv,
@@ -153,11 +158,14 @@ static const struct parman_ops mlxsw_sp_acl_ctcam_region_parman_ops = {
 	.algo		= PARMAN_ALGO_TYPE_LSORT,
 };
 
-int mlxsw_sp_acl_ctcam_region_init(struct mlxsw_sp *mlxsw_sp,
-				   struct mlxsw_sp_acl_ctcam_region *cregion,
-				   struct mlxsw_sp_acl_tcam_region *region)
+int
+mlxsw_sp_acl_ctcam_region_init(struct mlxsw_sp *mlxsw_sp,
+			       struct mlxsw_sp_acl_ctcam_region *cregion,
+			       struct mlxsw_sp_acl_tcam_region *region,
+			       const struct mlxsw_sp_acl_ctcam_region_ops *ops)
 {
 	cregion->region = region;
+	cregion->ops = ops;
 	cregion->parman = parman_create(&mlxsw_sp_acl_ctcam_region_parman_ops,
 					cregion);
 	if (!cregion->parman)

drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_erp.c

@@ -1048,11 +1048,8 @@ mlxsw_sp_acl_erp_master_mask_init(struct mlxsw_sp_acl_atcam_region *aregion)
 {
 	struct mlxsw_sp *mlxsw_sp = aregion->region->mlxsw_sp;
 	char percr_pl[MLXSW_REG_PERCR_LEN];
-	char *master_mask;
 
 	mlxsw_reg_percr_pack(percr_pl, aregion->region->id);
-	master_mask = mlxsw_reg_percr_master_mask_data(percr_pl);
-	memset(master_mask, 0, MLXSW_REG_PTCEX_FLEX_KEY_BLOCKS_LEN);
 	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(percr), percr_pl);
 }
 
@@ -1062,7 +1059,7 @@ mlxsw_sp_acl_erp_region_param_init(struct mlxsw_sp_acl_atcam_region *aregion)
 	struct mlxsw_sp *mlxsw_sp = aregion->region->mlxsw_sp;
 	char pererp_pl[MLXSW_REG_PERERP_LEN];
 
-	mlxsw_reg_pererp_pack(pererp_pl, aregion->region->id, true, true, 0,
+	mlxsw_reg_pererp_pack(pererp_pl, aregion->region->id, false, false, 0,
 			      0, 0);
 	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pererp), pererp_pl);
 }
@@ -1077,16 +1074,12 @@ int mlxsw_sp_acl_erp_region_init(struct mlxsw_sp_acl_atcam_region *aregion)
 		return PTR_ERR(erp_table);
 	aregion->erp_table = erp_table;
 
-	/* Initialize the region's master mask to all ones for C-TCAM
-	 * only mode
-	 */
+	/* Initialize the region's master mask to all zeroes */
 	err = mlxsw_sp_acl_erp_master_mask_init(aregion);
 	if (err)
 		goto err_erp_master_mask_init;
 
-	/* Initialize the region to use the eRP table and enable C-TCAM
-	 * lookup
-	 */
+	/* Initialize the region to not use the eRP table */
 	err = mlxsw_sp_acl_erp_region_param_init(aregion);
 	if (err)
 		goto err_erp_region_param_init;

drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.h

@@ -112,6 +112,7 @@ struct mlxsw_sp_acl_tcam_region {
 
 struct mlxsw_sp_acl_ctcam_region {
 	struct parman *parman;
+	const struct mlxsw_sp_acl_ctcam_region_ops *ops;
 	struct mlxsw_sp_acl_tcam_region *region;
 };
 
@@ -123,9 +124,19 @@ struct mlxsw_sp_acl_ctcam_entry {
 	struct parman_item parman_item;
 };
 
-int mlxsw_sp_acl_ctcam_region_init(struct mlxsw_sp *mlxsw_sp,
-				   struct mlxsw_sp_acl_ctcam_region *cregion,
-				   struct mlxsw_sp_acl_tcam_region *region);
+struct mlxsw_sp_acl_ctcam_region_ops {
+	int (*entry_insert)(struct mlxsw_sp_acl_ctcam_region *cregion,
+			    struct mlxsw_sp_acl_ctcam_entry *centry,
+			    const char *mask);
+	void (*entry_remove)(struct mlxsw_sp_acl_ctcam_region *cregion,
+			     struct mlxsw_sp_acl_ctcam_entry *centry);
+};
+
+int
+mlxsw_sp_acl_ctcam_region_init(struct mlxsw_sp *mlxsw_sp,
+			       struct mlxsw_sp_acl_ctcam_region *cregion,
+			       struct mlxsw_sp_acl_tcam_region *region,
+			       const struct mlxsw_sp_acl_ctcam_region_ops *ops);
 void mlxsw_sp_acl_ctcam_region_fini(struct mlxsw_sp_acl_ctcam_region *cregion);
 void mlxsw_sp_acl_ctcam_chunk_init(struct mlxsw_sp_acl_ctcam_region *cregion,
 				   struct mlxsw_sp_acl_ctcam_chunk *cchunk,
@@ -190,12 +201,26 @@ struct mlxsw_sp_acl_atcam_entry {
 	struct mlxsw_sp_acl_erp *erp;
 };
 
+static inline struct mlxsw_sp_acl_atcam_region *
+mlxsw_sp_acl_tcam_cregion_aregion(struct mlxsw_sp_acl_ctcam_region *cregion)
+{
+	return container_of(cregion, struct mlxsw_sp_acl_atcam_region, cregion);
+}
+
+static inline struct mlxsw_sp_acl_atcam_entry *
+mlxsw_sp_acl_tcam_centry_aentry(struct mlxsw_sp_acl_ctcam_entry *centry)
+{
+	return container_of(centry, struct mlxsw_sp_acl_atcam_entry, centry);
+}
+
 int mlxsw_sp_acl_atcam_region_associate(struct mlxsw_sp *mlxsw_sp,
 					u16 region_id);
-int mlxsw_sp_acl_atcam_region_init(struct mlxsw_sp *mlxsw_sp,
-				   struct mlxsw_sp_acl_atcam *atcam,
-				   struct mlxsw_sp_acl_atcam_region *aregion,
-				   struct mlxsw_sp_acl_tcam_region *region);
+int
+mlxsw_sp_acl_atcam_region_init(struct mlxsw_sp *mlxsw_sp,
+			       struct mlxsw_sp_acl_atcam *atcam,
+			       struct mlxsw_sp_acl_atcam_region *aregion,
+			       struct mlxsw_sp_acl_tcam_region *region,
+			       const struct mlxsw_sp_acl_ctcam_region_ops *ops);
 void mlxsw_sp_acl_atcam_region_fini(struct mlxsw_sp_acl_atcam_region *aregion);
 void mlxsw_sp_acl_atcam_chunk_init(struct mlxsw_sp_acl_atcam_region *aregion,
 				   struct mlxsw_sp_acl_atcam_chunk *achunk,