Add support for devlink reload action 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 <[email protected]>
---
v1 -> v2:
- Have fw_live_patch action instead of level
---
.../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 d975f5bd7394..a62281cfc084 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_reload_fw_activate(struct devlink *devlink, struct netli
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_action action,
struct netlink_ext_ack *extack)
@@ -127,6 +150,8 @@ static int mlx5_devlink_reload_down(struct devlink *devlink, bool netns_change,
return 0;
case DEVLINK_RELOAD_ACTION_FW_ACTIVATE:
return mlx5_devlink_reload_fw_activate(devlink, extack);
+ case DEVLINK_RELOAD_ACTION_FW_LIVE_PATCH:
+ return mlx5_devlink_trigger_fw_live_patch(devlink, extack);
default:
/* Unsupported action should not get to this function */
WARN_ON(1);
@@ -143,6 +168,8 @@ static int mlx5_devlink_reload_up(struct devlink *devlink, enum devlink_reload_a
case DEVLINK_RELOAD_ACTION_DRIVER_REINIT:
case DEVLINK_RELOAD_ACTION_FW_ACTIVATE:
return mlx5_load_one(dev, false);
+ case DEVLINK_RELOAD_ACTION_FW_LIVE_PATCH:
+ return 0;
default:
/* Unsupported action should not get to this function */
WARN_ON(1);
@@ -164,7 +191,8 @@ static const struct devlink_ops mlx5_devlink_ops = {
.flash_update = mlx5_devlink_flash_update,
.info_get = mlx5_devlink_info_get,
.supported_reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT) |
- BIT(DEVLINK_RELOAD_ACTION_FW_ACTIVATE),
+ BIT(DEVLINK_RELOAD_ACTION_FW_ACTIVATE) |
+ BIT(DEVLINK_RELOAD_ACTION_FW_LIVE_PATCH),
.reload_down = mlx5_devlink_reload_down,
.reload_up = mlx5_devlink_reload_up,
};
--
2.17.1