From 2d69356752ff862dbb0c7e6725874740799d7708 Mon Sep 17 00:00:00 2001 From: Moshe Shemesh Date: Wed, 7 Oct 2020 09:00:55 +0300 Subject: net/mlx5: Add support for fw live patch event Firmware live patch event notifies the driver that the firmware was just updated using live patch. In such case the driver should not reload or re-initiate entities, part to updating the firmware version and re-initiate the firmware tracer which can be updated by live patch with new strings database to help debugging an issue. Signed-off-by: Moshe Shemesh Reviewed-by: Saeed Mahameed Signed-off-by: Jakub Kicinski --- .../ethernet/mellanox/mlx5/core/diag/fw_tracer.c | 52 ++++++++++++++++++++++ 1 file changed, 52 insertions(+) (limited to 'drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c') diff --git a/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c b/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c index ede4640b8428..2eb022ad7fd0 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c @@ -1066,6 +1066,58 @@ void mlx5_fw_tracer_destroy(struct mlx5_fw_tracer *tracer) kvfree(tracer); } +static int mlx5_fw_tracer_recreate_strings_db(struct mlx5_fw_tracer *tracer) +{ + struct mlx5_core_dev *dev; + int err; + + cancel_work_sync(&tracer->read_fw_strings_work); + mlx5_fw_tracer_clean_ready_list(tracer); + mlx5_fw_tracer_clean_print_hash(tracer); + mlx5_fw_tracer_clean_saved_traces_array(tracer); + mlx5_fw_tracer_free_strings_db(tracer); + + dev = tracer->dev; + err = mlx5_query_mtrc_caps(tracer); + if (err) { + mlx5_core_dbg(dev, "FWTracer: Failed to query capabilities %d\n", err); + return err; + } + + err = mlx5_fw_tracer_allocate_strings_db(tracer); + if (err) { + mlx5_core_warn(dev, "FWTracer: Allocate strings DB failed %d\n", err); + return err; + } + mlx5_fw_tracer_init_saved_traces_array(tracer); + + return 0; +} + +int mlx5_fw_tracer_reload(struct mlx5_fw_tracer *tracer) +{ + struct mlx5_core_dev *dev; + int err; + + if (IS_ERR_OR_NULL(tracer)) + return -EINVAL; + + dev = tracer->dev; + mlx5_fw_tracer_cleanup(tracer); + err = mlx5_fw_tracer_recreate_strings_db(tracer); + if (err) { + mlx5_core_warn(dev, "Failed to recreate FW tracer strings DB\n"); + return err; + } + err = mlx5_fw_tracer_init(tracer); + if (err) { + mlx5_core_warn(dev, "Failed to re-initialize FW tracer\n"); + return err; + } + + return 0; +} + static int fw_tracer_event(struct notifier_block *nb, unsigned long action, void *data) { struct mlx5_fw_tracer *tracer = mlx5_nb_cof(nb, struct mlx5_fw_tracer, nb); -- cgit