netdev - [PATCH net-next v2 14/15] mlxsw: spectrum: Set KVH XLT cache mode for Spectrum2/3

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Date:   Mon, 14 Dec 2020 13:30:40 +0200
From:   Ido Schimmel <idosch@...sch.org>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, jiri@...dia.com,
        mlxsw@...dia.com, Ido Schimmel <idosch@...dia.com>
Subject: [PATCH net-next v2 14/15] mlxsw: spectrum: Set KVH XLT cache mode for Spectrum2/3

From: Jiri Pirko <jiri@...dia.com>

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@...dia.com>
Signed-off-by: Ido Schimmel <idosch@...dia.com>
---
 drivers/net/ethernet/mellanox/mlxsw/cmd.h      | 13 +++++++++++++
 drivers/net/ethernet/mellanox/mlxsw/core.h     |  4 +++-
 drivers/net/ethernet/mellanox/mlxsw/pci.c      |  6 ++++++
 drivers/net/ethernet/mellanox/mlxsw/spectrum.c |  2 ++
 4 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/cmd.h b/drivers/net/ethernet/mellanox/mlxsw/cmd.h
index 4de15c56542f..392ce3cb27f7 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/cmd.h
+++ b/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
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.h b/drivers/net/ethernet/mellanox/mlxsw/core.h
index 6558f9cde3d6..6b3ccbf6b238 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.h
+++ b/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];
 };
 
diff --git a/drivers/net/ethernet/mellanox/mlxsw/pci.c b/drivers/net/ethernet/mellanox/mlxsw/pci.c
index aae472f0e62f..4eeae8d78006 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/pci.c
+++ b/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,
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index 516d6cb45c9f..1650d9852b5b 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/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,
-- 
2.29.2