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net/mlx5: fw_tracer, Add support for strings DB update event

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In case a new string DB is added to the FW, the FW publishes an event
notifying the strings DB have updated.

Add support in driver for handling this event.

Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Shay Drory
2023-01-12 14:33:00 +02:00
committed by Saeed Mahameed
parent b0118ced6b
commit 7dfcd110a4
3 changed files with 49 additions and 6 deletions
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46
drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c
View File

@@ -936,6 +936,14 @@ int mlx5_fw_tracer_get_saved_traces_objects(struct mlx5_fw_tracer *tracer,
return err;
}
static void mlx5_fw_tracer_update_db(struct work_struct *work)
{
struct mlx5_fw_tracer *tracer =
container_of(work, struct mlx5_fw_tracer, update_db_work);
mlx5_fw_tracer_reload(tracer);
}
/* Create software resources (Buffers, etc ..) */
struct mlx5_fw_tracer *mlx5_fw_tracer_create(struct mlx5_core_dev *dev)
{
@@ -963,6 +971,8 @@ struct mlx5_fw_tracer *mlx5_fw_tracer_create(struct mlx5_core_dev *dev)
INIT_WORK(&tracer->ownership_change_work, mlx5_fw_tracer_ownership_change);
INIT_WORK(&tracer->read_fw_strings_work, mlx5_tracer_read_strings_db);
INIT_WORK(&tracer->handle_traces_work, mlx5_fw_tracer_handle_traces);
INIT_WORK(&tracer->update_db_work, mlx5_fw_tracer_update_db);
mutex_init(&tracer->state_lock);
err = mlx5_query_mtrc_caps(tracer);
@@ -1009,11 +1019,15 @@ int mlx5_fw_tracer_init(struct mlx5_fw_tracer *tracer)
if (IS_ERR_OR_NULL(tracer))
return 0;
dev = tracer->dev;
if (!tracer->str_db.loaded)
queue_work(tracer->work_queue, &tracer->read_fw_strings_work);
mutex_lock(&tracer->state_lock);
if (test_and_set_bit(MLX5_TRACER_STATE_UP, &tracer->state))
goto unlock;
dev = tracer->dev;
err = mlx5_core_alloc_pd(dev, &tracer->buff.pdn);
if (err) {
mlx5_core_warn(dev, "FWTracer: Failed to allocate PD %d\n", err);
@@ -1034,6 +1048,8 @@ int mlx5_fw_tracer_init(struct mlx5_fw_tracer *tracer)
mlx5_core_warn(dev, "FWTracer: Failed to start tracer %d\n", err);
goto err_notifier_unregister;
}
unlock:
mutex_unlock(&tracer->state_lock);
return 0;
err_notifier_unregister:
@@ -1043,6 +1059,7 @@ int mlx5_fw_tracer_init(struct mlx5_fw_tracer *tracer)
mlx5_core_dealloc_pd(dev, tracer->buff.pdn);
err_cancel_work:
cancel_work_sync(&tracer->read_fw_strings_work);
mutex_unlock(&tracer->state_lock);
return err;
}
@@ -1052,17 +1069,27 @@ void mlx5_fw_tracer_cleanup(struct mlx5_fw_tracer *tracer)
if (IS_ERR_OR_NULL(tracer))
return;
mutex_lock(&tracer->state_lock);
if (!test_and_clear_bit(MLX5_TRACER_STATE_UP, &tracer->state))
goto unlock;
mlx5_core_dbg(tracer->dev, "FWTracer: Cleanup, is owner ? (%d)\n",
tracer->owner);
mlx5_eq_notifier_unregister(tracer->dev, &tracer->nb);
cancel_work_sync(&tracer->ownership_change_work);
cancel_work_sync(&tracer->handle_traces_work);
/* It is valid to get here from update_db_work. Hence, don't wait for
* update_db_work to finished.
*/
cancel_work(&tracer->update_db_work);
if (tracer->owner)
mlx5_fw_tracer_ownership_release(tracer);
mlx5_core_destroy_mkey(tracer->dev, tracer->buff.mkey);
mlx5_core_dealloc_pd(tracer->dev, tracer->buff.pdn);
unlock:
mutex_unlock(&tracer->state_lock);
}
/* Free software resources (Buffers, etc ..) */
@@ -1079,6 +1106,7 @@ void mlx5_fw_tracer_destroy(struct mlx5_fw_tracer *tracer)
mlx5_fw_tracer_clean_saved_traces_array(tracer);
mlx5_fw_tracer_free_strings_db(tracer);
mlx5_fw_tracer_destroy_log_buf(tracer);
mutex_destroy(&tracer->state_lock);
destroy_workqueue(tracer->work_queue);
kvfree(tracer);
}
@@ -1088,6 +1116,8 @@ static int mlx5_fw_tracer_recreate_strings_db(struct mlx5_fw_tracer *tracer)
struct mlx5_core_dev *dev;
int err;
if (test_and_set_bit(MLX5_TRACER_RECREATE_DB, &tracer->state))
return 0;
cancel_work_sync(&tracer->read_fw_strings_work);
mlx5_fw_tracer_clean_ready_list(tracer);
mlx5_fw_tracer_clean_print_hash(tracer);
@@ -1098,17 +1128,18 @@ static int mlx5_fw_tracer_recreate_strings_db(struct mlx5_fw_tracer *tracer)
err = mlx5_query_mtrc_caps(tracer);
if (err) {
mlx5_core_dbg(dev, "FWTracer: Failed to query capabilities %d\n", err);
return err;
goto out;
}
err = mlx5_fw_tracer_allocate_strings_db(tracer);
if (err) {
mlx5_core_warn(dev, "FWTracer: Allocate strings DB failed %d\n", err);
return err;
goto out;
}
mlx5_fw_tracer_init_saved_traces_array(tracer);
return 0;
out:
clear_bit(MLX5_TRACER_RECREATE_DB, &tracer->state);
return err;
}
int mlx5_fw_tracer_reload(struct mlx5_fw_tracer *tracer)
@@ -1148,6 +1179,9 @@ static int fw_tracer_event(struct notifier_block *nb, unsigned long action, void
case MLX5_TRACER_SUBTYPE_TRACES_AVAILABLE:
queue_work(tracer->work_queue, &tracer->handle_traces_work);
break;
case MLX5_TRACER_SUBTYPE_STRINGS_DB_UPDATE:
queue_work(tracer->work_queue, &tracer->update_db_work);
break;
default:
mlx5_core_dbg(dev, "FWTracer: Event with unrecognized subtype: sub_type %d\n",
eqe->sub_type);

8
drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.h
View File

@@ -63,6 +63,11 @@ struct mlx5_fw_trace_data {
char msg[TRACE_STR_MSG];
};
enum mlx5_fw_tracer_state {
MLX5_TRACER_STATE_UP = BIT(0),
MLX5_TRACER_RECREATE_DB = BIT(1),
};
struct mlx5_fw_tracer {
struct mlx5_core_dev *dev;
struct mlx5_nb nb;
@@ -104,6 +109,9 @@ struct mlx5_fw_tracer {
struct work_struct handle_traces_work;
struct hlist_head hash[MESSAGE_HASH_SIZE];
struct list_head ready_strings_list;
struct work_struct update_db_work;
struct mutex state_lock; /* Synchronize update work with reload flows */
unsigned long state;
};
struct tracer_string_format {

1
include/linux/mlx5/device.h
View File

@@ -367,6 +367,7 @@ enum mlx5_driver_event {
enum {
MLX5_TRACER_SUBTYPE_OWNERSHIP_CHANGE = 0x0,
MLX5_TRACER_SUBTYPE_TRACES_AVAILABLE = 0x1,
MLX5_TRACER_SUBTYPE_STRINGS_DB_UPDATE = 0x2,
};
enum {