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
