--- /dev/null
+/*
+ * Copyright (c) 2018, Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "fw_tracer.h"
+
+static int mlx5_query_mtrc_caps(struct mlx5_fw_tracer *tracer)
+{
+ u32 *string_db_base_address_out = tracer->str_db.base_address_out;
+ u32 *string_db_size_out = tracer->str_db.size_out;
+ struct mlx5_core_dev *dev = tracer->dev;
+ u32 out[MLX5_ST_SZ_DW(mtrc_cap)] = {0};
+ u32 in[MLX5_ST_SZ_DW(mtrc_cap)] = {0};
+ void *mtrc_cap_sp;
+ int err, i;
+
+ err = mlx5_core_access_reg(dev, in, sizeof(in), out, sizeof(out),
+ MLX5_REG_MTRC_CAP, 0, 0);
+ if (err) {
+ mlx5_core_warn(dev, "FWTracer: Error reading tracer caps %d\n",
+ err);
+ return err;
+ }
+
+ if (!MLX5_GET(mtrc_cap, out, trace_to_memory)) {
+ mlx5_core_dbg(dev, "FWTracer: Device does not support logging traces to memory\n");
+ return -ENOTSUPP;
+ }
+
+ tracer->trc_ver = MLX5_GET(mtrc_cap, out, trc_ver);
+ tracer->str_db.first_string_trace =
+ MLX5_GET(mtrc_cap, out, first_string_trace);
+ tracer->str_db.num_string_trace =
+ MLX5_GET(mtrc_cap, out, num_string_trace);
+ tracer->str_db.num_string_db = MLX5_GET(mtrc_cap, out, num_string_db);
+ tracer->owner = !!MLX5_GET(mtrc_cap, out, trace_owner);
+
+ for (i = 0; i < tracer->str_db.num_string_db; i++) {
+ mtrc_cap_sp = MLX5_ADDR_OF(mtrc_cap, out, string_db_param[i]);
+ string_db_base_address_out[i] = MLX5_GET(mtrc_string_db_param,
+ mtrc_cap_sp,
+ string_db_base_address);
+ string_db_size_out[i] = MLX5_GET(mtrc_string_db_param,
+ mtrc_cap_sp, string_db_size);
+ }
+
+ return err;
+}
+
+static int mlx5_set_mtrc_caps_trace_owner(struct mlx5_fw_tracer *tracer,
+ u32 *out, u32 out_size,
+ u8 trace_owner)
+{
+ struct mlx5_core_dev *dev = tracer->dev;
+ u32 in[MLX5_ST_SZ_DW(mtrc_cap)] = {0};
+
+ MLX5_SET(mtrc_cap, in, trace_owner, trace_owner);
+
+ return mlx5_core_access_reg(dev, in, sizeof(in), out, out_size,
+ MLX5_REG_MTRC_CAP, 0, 1);
+}
+
+static int mlx5_fw_tracer_ownership_acquire(struct mlx5_fw_tracer *tracer)
+{
+ struct mlx5_core_dev *dev = tracer->dev;
+ u32 out[MLX5_ST_SZ_DW(mtrc_cap)] = {0};
+ int err;
+
+ err = mlx5_set_mtrc_caps_trace_owner(tracer, out, sizeof(out),
+ MLX5_FW_TRACER_ACQUIRE_OWNERSHIP);
+ if (err) {
+ mlx5_core_warn(dev, "FWTracer: Acquire tracer ownership failed %d\n",
+ err);
+ return err;
+ }
+
+ tracer->owner = !!MLX5_GET(mtrc_cap, out, trace_owner);
+
+ if (!tracer->owner)
+ return -EBUSY;
+
+ return 0;
+}
+
+static void mlx5_fw_tracer_ownership_release(struct mlx5_fw_tracer *tracer)
+{
+ u32 out[MLX5_ST_SZ_DW(mtrc_cap)] = {0};
+
+ mlx5_set_mtrc_caps_trace_owner(tracer, out, sizeof(out),
+ MLX5_FW_TRACER_RELEASE_OWNERSHIP);
+ tracer->owner = false;
+}
+
+static void mlx5_fw_tracer_ownership_change(struct work_struct *work)
+{
+ struct mlx5_fw_tracer *tracer = container_of(work, struct mlx5_fw_tracer,
+ ownership_change_work);
+ struct mlx5_core_dev *dev = tracer->dev;
+ int err;
+
+ if (tracer->owner) {
+ mlx5_fw_tracer_ownership_release(tracer);
+ return;
+ }
+
+ err = mlx5_fw_tracer_ownership_acquire(tracer);
+ if (err) {
+ mlx5_core_dbg(dev, "FWTracer: Ownership was not granted %d\n", err);
+ return;
+ }
+}
+
+struct mlx5_fw_tracer *mlx5_fw_tracer_create(struct mlx5_core_dev *dev)
+{
+ struct mlx5_fw_tracer *tracer = NULL;
+ int err;
+
+ if (!MLX5_CAP_MCAM_REG(dev, tracer_registers)) {
+ mlx5_core_dbg(dev, "FWTracer: Tracer capability not present\n");
+ return NULL;
+ }
+
+ tracer = kzalloc(sizeof(*tracer), GFP_KERNEL);
+ if (!tracer)
+ return ERR_PTR(-ENOMEM);
+
+ tracer->work_queue = create_singlethread_workqueue("mlx5_fw_tracer");
+ if (!tracer->work_queue) {
+ err = -ENOMEM;
+ goto free_tracer;
+ }
+
+ tracer->dev = dev;
+
+ INIT_WORK(&tracer->ownership_change_work, mlx5_fw_tracer_ownership_change);
+
+ err = mlx5_query_mtrc_caps(tracer);
+ if (err) {
+ mlx5_core_dbg(dev, "FWTracer: Failed to query capabilities %d\n", err);
+ goto destroy_workqueue;
+ }
+
+ mlx5_fw_tracer_ownership_change(&tracer->ownership_change_work);
+
+ return tracer;
+
+destroy_workqueue:
+ tracer->dev = NULL;
+ destroy_workqueue(tracer->work_queue);
+free_tracer:
+ kfree(tracer);
+ return ERR_PTR(err);
+}
+
+void mlx5_fw_tracer_destroy(struct mlx5_fw_tracer *tracer)
+{
+ if (!tracer)
+ return;
+
+ cancel_work_sync(&tracer->ownership_change_work);
+
+ if (tracer->owner)
+ mlx5_fw_tracer_ownership_release(tracer);
+
+ flush_workqueue(tracer->work_queue);
+ destroy_workqueue(tracer->work_queue);
+ kfree(tracer);
+}
--- /dev/null
+/*
+ * Copyright (c) 2018, Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef __LIB_TRACER_H__
+#define __LIB_TRACER_H__
+
+#include <linux/mlx5/driver.h>
+#include "mlx5_core.h"
+
+#define STRINGS_DB_SECTIONS_NUM 8
+
+struct mlx5_fw_tracer {
+ struct mlx5_core_dev *dev;
+ bool owner;
+ u8 trc_ver;
+ struct workqueue_struct *work_queue;
+ struct work_struct ownership_change_work;
+
+ /* Strings DB */
+ struct {
+ u8 first_string_trace;
+ u8 num_string_trace;
+ u32 num_string_db;
+ u32 base_address_out[STRINGS_DB_SECTIONS_NUM];
+ u32 size_out[STRINGS_DB_SECTIONS_NUM];
+ } str_db;
+};
+
+enum mlx5_fw_tracer_ownership_state {
+ MLX5_FW_TRACER_RELEASE_OWNERSHIP,
+ MLX5_FW_TRACER_ACQUIRE_OWNERSHIP,
+};
+
+struct mlx5_fw_tracer *mlx5_fw_tracer_create(struct mlx5_core_dev *dev);
+void mlx5_fw_tracer_destroy(struct mlx5_fw_tracer *tracer);
+
+#endif
projects / users / hch / xfs.git / commitdiff