From 064501c5b6fd344cc2770194f23d620c65f2bd2c Mon Sep 17 00:00:00 2001 From: Shalom Toledo Date: Mon, 3 Dec 2018 07:59:02 +0000 Subject: [PATCH] mlxsw: spectrum: Load firmware version based on devlink parameter Load firmware version based on 'fw_load_policy' devlink parameter. The driver supports these two options: * DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DRIVER (0) Default, load firmware version preferred by the driver * DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_FLASH (1) Load firmware currently stored in flash The second option, 'flash', allow the device to run with different firmware version than preferred by the driver for testing and/or debugging purposes. For example, testing a firmware bug fix. Signed-off-by: Shalom Toledo Reviewed-by: Jiri Pirko Signed-off-by: Ido Schimmel Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlxsw/core.c | 13 ++++++ drivers/net/ethernet/mellanox/mlxsw/core.h | 2 + drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 60 ++++++++++++++++++++++++++ 3 files changed, 75 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c index b2e1b83..281aeb1 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/core.c +++ b/drivers/net/ethernet/mellanox/mlxsw/core.c @@ -1036,6 +1036,12 @@ __mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info, goto err_devlink_register; } + if (mlxsw_driver->params_register && !reload) { + err = mlxsw_driver->params_register(mlxsw_core); + if (err) + goto err_register_params; + } + err = mlxsw_hwmon_init(mlxsw_core, mlxsw_bus_info, &mlxsw_core->hwmon); if (err) goto err_hwmon_init; @@ -1058,6 +1064,9 @@ err_driver_init: err_thermal_init: mlxsw_hwmon_fini(mlxsw_core->hwmon); err_hwmon_init: + if (mlxsw_driver->params_unregister && !reload) + mlxsw_driver->params_unregister(mlxsw_core); +err_register_params: if (!reload) devlink_unregister(devlink); err_devlink_register: @@ -1121,6 +1130,8 @@ void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core, mlxsw_core->driver->fini(mlxsw_core); mlxsw_thermal_fini(mlxsw_core->thermal); mlxsw_hwmon_fini(mlxsw_core->hwmon); + if (mlxsw_core->driver->params_unregister && !reload) + mlxsw_core->driver->params_unregister(mlxsw_core); if (!reload) devlink_unregister(devlink); mlxsw_emad_fini(mlxsw_core); @@ -1133,6 +1144,8 @@ void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core, return; reload_fail_deinit: + if (mlxsw_core->driver->params_unregister) + mlxsw_core->driver->params_unregister(mlxsw_core); devlink_unregister(devlink); devlink_resources_unregister(devlink, NULL); devlink_free(devlink); diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.h b/drivers/net/ethernet/mellanox/mlxsw/core.h index c35be47..d811be8 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/core.h +++ b/drivers/net/ethernet/mellanox/mlxsw/core.h @@ -282,6 +282,8 @@ struct mlxsw_driver { const struct mlxsw_config_profile *profile, u64 *p_single_size, u64 *p_double_size, u64 *p_linear_size); + int (*params_register)(struct mlxsw_core *mlxsw_core); + void (*params_unregister)(struct mlxsw_core *mlxsw_core); u8 txhdr_len; const struct mlxsw_config_profile *profile; bool res_query_enabled; diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c index 3b3b593..c293ff1 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c @@ -318,6 +318,7 @@ static int mlxsw_sp_fw_rev_validate(struct mlxsw_sp *mlxsw_sp) const struct mlxsw_fw_rev *rev = &mlxsw_sp->bus_info->fw_rev; const struct mlxsw_fw_rev *req_rev = mlxsw_sp->req_rev; const char *fw_filename = mlxsw_sp->fw_filename; + union devlink_param_value value; const struct firmware *firmware; int err; @@ -325,6 +326,15 @@ static int mlxsw_sp_fw_rev_validate(struct mlxsw_sp *mlxsw_sp) if (!req_rev || !fw_filename) return 0; + /* Don't check if devlink 'fw_load_policy' param is 'flash' */ + err = devlink_param_driverinit_value_get(priv_to_devlink(mlxsw_sp->core), + DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY, + &value); + if (err) + return err; + if (value.vu8 == DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_FLASH) + return 0; + /* Validate driver & FW are compatible */ if (rev->major != req_rev->major) { WARN(1, "Mismatch in major FW version [%d:%d] is never expected; Please contact support\n", @@ -4328,6 +4338,52 @@ static int mlxsw_sp_kvd_sizes_get(struct mlxsw_core *mlxsw_core, return 0; } +static int +mlxsw_sp_devlink_param_fw_load_policy_validate(struct devlink *devlink, u32 id, + union devlink_param_value val, + struct netlink_ext_ack *extack) +{ + if ((val.vu8 != DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DRIVER) && + (val.vu8 != DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_FLASH)) { + NL_SET_ERR_MSG_MOD(extack, "'fw_load_policy' must be 'driver' or 'flash'"); + return -EINVAL; + } + + return 0; +} + +static const struct devlink_param mlxsw_sp_devlink_params[] = { + DEVLINK_PARAM_GENERIC(FW_LOAD_POLICY, + BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), + NULL, NULL, + mlxsw_sp_devlink_param_fw_load_policy_validate), +}; + +static int mlxsw_sp_params_register(struct mlxsw_core *mlxsw_core) +{ + struct devlink *devlink = priv_to_devlink(mlxsw_core); + union devlink_param_value value; + int err; + + err = devlink_params_register(devlink, mlxsw_sp_devlink_params, + ARRAY_SIZE(mlxsw_sp_devlink_params)); + if (err) + return err; + + value.vu8 = DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DRIVER; + devlink_param_driverinit_value_set(devlink, + DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY, + value); + return 0; +} + +static void mlxsw_sp_params_unregister(struct mlxsw_core *mlxsw_core) +{ + devlink_params_unregister(priv_to_devlink(mlxsw_core), + mlxsw_sp_devlink_params, + ARRAY_SIZE(mlxsw_sp_devlink_params)); +} + static struct mlxsw_driver mlxsw_sp1_driver = { .kind = mlxsw_sp1_driver_name, .priv_size = sizeof(struct mlxsw_sp), @@ -4349,6 +4405,8 @@ static struct mlxsw_driver mlxsw_sp1_driver = { .txhdr_construct = mlxsw_sp_txhdr_construct, .resources_register = mlxsw_sp1_resources_register, .kvd_sizes_get = mlxsw_sp_kvd_sizes_get, + .params_register = mlxsw_sp_params_register, + .params_unregister = mlxsw_sp_params_unregister, .txhdr_len = MLXSW_TXHDR_LEN, .profile = &mlxsw_sp1_config_profile, .res_query_enabled = true, @@ -4374,6 +4432,8 @@ static struct mlxsw_driver mlxsw_sp2_driver = { .sb_occ_tc_port_bind_get = mlxsw_sp_sb_occ_tc_port_bind_get, .txhdr_construct = mlxsw_sp_txhdr_construct, .resources_register = mlxsw_sp2_resources_register, + .params_register = mlxsw_sp_params_register, + .params_unregister = mlxsw_sp_params_unregister, .txhdr_len = MLXSW_TXHDR_LEN, .profile = &mlxsw_sp2_config_profile, .res_query_enabled = true, -- 2.7.4