From e21d21ca31f2fec31f9359a2209929a32a5faf9f Mon Sep 17 00:00:00 2001 From: Arkadi Sharshevsky Date: Mon, 15 Jan 2018 08:59:10 +0100 Subject: mlxsw: pci: Add support for getting resource through devlink Up until now the KVD partition was static. This patch introduces the ability to get the resource sizes via devlink. In case the resource is not available the default configuration is used. Signed-off-by: Arkadi Sharshevsky Signed-off-by: Jiri Pirko Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 57 ++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) (limited to 'drivers/net/ethernet/mellanox/mlxsw/spectrum.c') diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c index 87f8a74118d9..ed92e04309ba 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c @@ -4182,6 +4182,62 @@ static int mlxsw_sp_resources_register(struct mlxsw_core *mlxsw_core) return 0; } +static int mlxsw_sp_kvd_sizes_get(struct mlxsw_core *mlxsw_core, + const struct mlxsw_config_profile *profile, + u64 *p_single_size, u64 *p_double_size, + u64 *p_linear_size) +{ + struct devlink *devlink = priv_to_devlink(mlxsw_core); + u32 double_size; + int err; + + if (!MLXSW_CORE_RES_VALID(mlxsw_core, KVD_SINGLE_MIN_SIZE) || + !MLXSW_CORE_RES_VALID(mlxsw_core, KVD_DOUBLE_MIN_SIZE) || + !profile->used_kvd_split_data) + return -EIO; + + /* The hash part is what left of the kvd without the + * linear part. It is split to the single size and + * double size by the parts ratio from the profile. + * Both sizes must be a multiplications of the + * granularity from the profile. In case the user + * provided the sizes they are obtained via devlink. + */ + err = devlink_resource_size_get(devlink, + MLXSW_SP_RESOURCE_KVD_LINEAR, + p_linear_size); + if (err) + *p_linear_size = profile->kvd_linear_size; + + err = devlink_resource_size_get(devlink, + MLXSW_SP_RESOURCE_KVD_HASH_DOUBLE, + p_double_size); + if (err) { + double_size = MLXSW_CORE_RES_GET(mlxsw_core, KVD_SIZE) - + *p_linear_size; + double_size *= profile->kvd_hash_double_parts; + double_size /= profile->kvd_hash_double_parts + + profile->kvd_hash_single_parts; + *p_double_size = rounddown(double_size, + profile->kvd_hash_granularity); + } + + err = devlink_resource_size_get(devlink, + MLXSW_SP_RESOURCE_KVD_HASH_SINGLE, + p_single_size); + if (err) + *p_single_size = MLXSW_CORE_RES_GET(mlxsw_core, KVD_SIZE) - + *p_double_size - *p_linear_size; + + /* Check results are legal. */ + if (*p_single_size < MLXSW_CORE_RES_GET(mlxsw_core, KVD_SINGLE_MIN_SIZE) || + *p_double_size < MLXSW_CORE_RES_GET(mlxsw_core, KVD_DOUBLE_MIN_SIZE) || + MLXSW_CORE_RES_GET(mlxsw_core, KVD_SIZE) < *p_linear_size) + return -EIO; + + return 0; +} + static struct mlxsw_driver mlxsw_sp_driver = { .kind = mlxsw_sp_driver_name, .priv_size = sizeof(struct mlxsw_sp), @@ -4202,6 +4258,7 @@ static struct mlxsw_driver mlxsw_sp_driver = { .sb_occ_tc_port_bind_get = mlxsw_sp_sb_occ_tc_port_bind_get, .txhdr_construct = mlxsw_sp_txhdr_construct, .resources_register = mlxsw_sp_resources_register, + .kvd_sizes_get = mlxsw_sp_kvd_sizes_get, .txhdr_len = MLXSW_TXHDR_LEN, .profile = &mlxsw_sp_config_profile, }; -- cgit v1.2.3-55-g7522