Add support for devlink reload level fw_live_patch which does live patching to firmware. The driver checks if the firmware is capable of handling the pending firmware changes as a live patch. If it is then it triggers fw_live_patch flow.
Signed-off-by: Moshe Shemesh <mo...@mellanox.com> --- .../net/ethernet/mellanox/mlx5/core/devlink.c | 30 ++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c index a81204b3dd7c..804e1e7b25cc 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c @@ -115,6 +115,29 @@ static int mlx5_devlink_trigger_fw_reset(struct devlink *devlink, struct netlink return err; } +static int mlx5_devlink_trigger_fw_live_patch(struct devlink *devlink, + struct netlink_ext_ack *extack) +{ + struct mlx5_core_dev *dev = devlink_priv(devlink); + u8 reset_level; + int err; + + err = mlx5_reg_mfrl_query(dev, &reset_level, NULL); + if (err) + return err; + if (!(reset_level & MLX5_MFRL_REG_RESET_LEVEL0)) { + NL_SET_ERR_MSG_MOD(extack, + "FW upgrade to the stored FW can't be done by FW live patching"); + return -EINVAL; + } + + err = mlx5_fw_set_live_patch(dev); + if (err) + return err; + + return 0; +} + static int mlx5_devlink_reload_down(struct devlink *devlink, bool netns_change, enum devlink_reload_level level, struct netlink_ext_ack *extack) { @@ -126,6 +149,8 @@ static int mlx5_devlink_reload_down(struct devlink *devlink, bool netns_change, return 0; case DEVLINK_RELOAD_LEVEL_FW_RESET: return mlx5_devlink_trigger_fw_reset(devlink, extack); + case DEVLINK_RELOAD_LEVEL_FW_LIVE_PATCH: + return mlx5_devlink_trigger_fw_live_patch(devlink, extack); default: /* Unsupported level should not get to this function */ WARN_ON(1); @@ -142,6 +167,8 @@ static int mlx5_devlink_reload_up(struct devlink *devlink, enum devlink_reload_l case DEVLINK_RELOAD_LEVEL_DRIVER: case DEVLINK_RELOAD_LEVEL_FW_RESET: return mlx5_load_one(dev, false); + case DEVLINK_RELOAD_LEVEL_FW_LIVE_PATCH: + return 0; default: /* Unsupported level should not get to this function */ WARN_ON(1); @@ -163,7 +190,8 @@ static const struct devlink_ops mlx5_devlink_ops = { .flash_update = mlx5_devlink_flash_update, .info_get = mlx5_devlink_info_get, .supported_reload_levels = BIT(DEVLINK_RELOAD_LEVEL_DRIVER) | - BIT(DEVLINK_RELOAD_LEVEL_FW_RESET), + BIT(DEVLINK_RELOAD_LEVEL_FW_RESET) | + BIT(DEVLINK_RELOAD_LEVEL_FW_LIVE_PATCH), .default_reload_level = DEVLINK_RELOAD_LEVEL_DRIVER, .reload_down = mlx5_devlink_reload_down, .reload_up = mlx5_devlink_reload_up, -- 2.17.1