mlxsw: spectrum: Set KVH XLT cache mode for Spectrum2/3

Set a profile option to instruct FW to use 1/2 of KVH for XLT cache, not
the whole one.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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

@@ -674,6 +674,12 @@ MLXSW_ITEM32(cmd_mbox, config_profile, set_kvd_hash_double_size, 0x0C, 26, 1);
  */
 MLXSW_ITEM32(cmd_mbox, config_profile, set_cqe_version, 0x08, 0, 1);
 
+/* cmd_mbox_config_set_kvh_xlt_cache_mode
+ * Capability bit. Setting a bit to 1 configures the profile
+ * according to the mailbox contents.
+ */
+MLXSW_ITEM32(cmd_mbox, config_profile, set_kvh_xlt_cache_mode, 0x08, 3, 1);
+
 /* cmd_mbox_config_profile_max_vepa_channels
  * Maximum number of VEPA channels per port (0 through 16)
  * 0 - multi-channel VEPA is disabled
@@ -800,6 +806,13 @@ MLXSW_ITEM32(cmd_mbox, config_profile, adaptive_routing_group_cap, 0x4C, 0, 16);
  */
 MLXSW_ITEM32(cmd_mbox, config_profile, arn, 0x50, 31, 1);
 
+/* cmd_mbox_config_profile_kvh_xlt_cache_mode
+ * KVH XLT cache mode:
+ * 0 - XLT can use all KVH as best-effort
+ * 1 - XLT cache uses 1/2 KVH
+ */
+MLXSW_ITEM32(cmd_mbox, config_profile, kvh_xlt_cache_mode, 0x50, 8, 4);
+
 /* cmd_mbox_config_kvd_linear_size
  * KVD Linear Size
  * Valid for Spectrum only

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

@@ -256,7 +256,8 @@ struct mlxsw_config_profile {
 		used_max_pkey:1,
 		used_ar_sec:1,
 		used_adaptive_routing_group_cap:1,
-		used_kvd_sizes:1;
+		used_kvd_sizes:1,
+		used_kvh_xlt_cache_mode:1;
 	u8	max_vepa_channels;
 	u16	max_mid;
 	u16	max_pgt;
@@ -278,6 +279,7 @@ struct mlxsw_config_profile {
 	u32	kvd_linear_size;
 	u8	kvd_hash_single_parts;
 	u8	kvd_hash_double_parts;
+	u8	kvh_xlt_cache_mode;
 	struct mlxsw_swid_config swid_config[MLXSW_CONFIG_PROFILE_SWID_COUNT];
 };
 

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

@@ -1196,6 +1196,12 @@ static int mlxsw_pci_config_profile(struct mlxsw_pci *mlxsw_pci, char *mbox,
 		mlxsw_cmd_mbox_config_profile_kvd_hash_double_size_set(mbox,
 					MLXSW_RES_GET(res, KVD_DOUBLE_SIZE));
 	}
+	if (profile->used_kvh_xlt_cache_mode) {
+		mlxsw_cmd_mbox_config_profile_set_kvh_xlt_cache_mode_set(
+			mbox, 1);
+		mlxsw_cmd_mbox_config_profile_kvh_xlt_cache_mode_set(
+			mbox, profile->kvh_xlt_cache_mode);
+	}
 
 	for (i = 0; i < MLXSW_CONFIG_PROFILE_SWID_COUNT; i++)
 		mlxsw_pci_config_profile_swid_config(mlxsw_pci, mbox, i,

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

@@ -2936,6 +2936,8 @@ static const struct mlxsw_config_profile mlxsw_sp2_config_profile = {
 	.max_ib_mc			= 0,
 	.used_max_pkey			= 1,
 	.max_pkey			= 0,
+	.used_kvh_xlt_cache_mode	= 1,
+	.kvh_xlt_cache_mode		= 1,
 	.swid_config			= {
 		{
 			.used_type	= 1,