Quelle  fw_tracer.c   Sprache: C

/*
 * 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.
 */
#define CREATE_TRACE_POINTS
#include "lib/eq.h"
#include "fw_tracer.h"
#include "fw_tracer_tracepoint.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);
 tracer->str_db.loaded = false;

 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 int mlx5_fw_tracer_create_log_buf(struct mlx5_fw_tracer *tracer)
{
 struct mlx5_core_dev *dev = tracer->dev;
 struct device *ddev;
 dma_addr_t dma;
 void *buff;
 gfp_t gfp;
 int err;

 tracer->buff.size = TRACE_BUFFER_SIZE_BYTE;

 gfp = GFP_KERNEL | __GFP_ZERO;
 buff = (void *)__get_free_pages(gfp,
     get_order(tracer->buff.size));
 if (!buff) {
  err = -ENOMEM;
  mlx5_core_warn(dev, "FWTracer: Failed to allocate pages, %d\n", err);
  return err;
 }
 tracer->buff.log_buf = buff;

 ddev = mlx5_core_dma_dev(dev);
 dma = dma_map_single(ddev, buff, tracer->buff.size, DMA_FROM_DEVICE);
 if (dma_mapping_error(ddev, dma)) {
  mlx5_core_warn(dev, "FWTracer: Unable to map DMA: %d\n",
          dma_mapping_error(ddev, dma));
  err = -ENOMEM;
  goto free_pages;
 }
 tracer->buff.dma = dma;

 return 0;

free_pages:
 free_pages((unsigned long)tracer->buff.log_buf, get_order(tracer->buff.size));

 return err;
}

static void mlx5_fw_tracer_destroy_log_buf(struct mlx5_fw_tracer *tracer)
{
 struct mlx5_core_dev *dev = tracer->dev;
 struct device *ddev;

 if (!tracer->buff.log_buf)
  return;

 ddev = mlx5_core_dma_dev(dev);
 dma_unmap_single(ddev, tracer->buff.dma, tracer->buff.size, DMA_FROM_DEVICE);
 free_pages((unsigned long)tracer->buff.log_buf, get_order(tracer->buff.size));
}

static int mlx5_fw_tracer_create_mkey(struct mlx5_fw_tracer *tracer)
{
 struct mlx5_core_dev *dev = tracer->dev;
 int err, inlen, i;
 __be64 *mtt;
 void *mkc;
 u32 *in;

 inlen = MLX5_ST_SZ_BYTES(create_mkey_in) +
   sizeof(*mtt) * round_up(TRACER_BUFFER_PAGE_NUM, 2);

 in = kvzalloc(inlen, GFP_KERNEL);
 if (!in)
  return -ENOMEM;

 MLX5_SET(create_mkey_in, in, translations_octword_actual_size,
   DIV_ROUND_UP(TRACER_BUFFER_PAGE_NUM, 2));
 mtt = (__be64 *)MLX5_ADDR_OF(create_mkey_in, in, klm_pas_mtt);
 for (i = 0 ; i < TRACER_BUFFER_PAGE_NUM ; i++)
  mtt[i] = cpu_to_be64(tracer->buff.dma + i * PAGE_SIZE);

 mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
 MLX5_SET(mkc, mkc, access_mode_1_0, MLX5_MKC_ACCESS_MODE_MTT);
 MLX5_SET(mkc, mkc, lr, 1);
 MLX5_SET(mkc, mkc, lw, 1);
 MLX5_SET(mkc, mkc, pd, tracer->buff.pdn);
 MLX5_SET(mkc, mkc, bsf_octword_size, 0);
 MLX5_SET(mkc, mkc, qpn, 0xffffff);
 MLX5_SET(mkc, mkc, log_page_size, PAGE_SHIFT);
 MLX5_SET(mkc, mkc, translations_octword_size,
   DIV_ROUND_UP(TRACER_BUFFER_PAGE_NUM, 2));
 MLX5_SET64(mkc, mkc, start_addr, tracer->buff.dma);
 MLX5_SET64(mkc, mkc, len, tracer->buff.size);
 err = mlx5_core_create_mkey(dev, &tracer->buff.mkey, in, inlen);
 if (err)
  mlx5_core_warn(dev, "FWTracer: Failed to create mkey, %d\n", err);

 kvfree(in);

 return err;
}

static void mlx5_fw_tracer_free_strings_db(struct mlx5_fw_tracer *tracer)
{
 u32 num_string_db = tracer->str_db.num_string_db;
 int i;

 for (i = 0; i < num_string_db; i++) {
  kfree(tracer->str_db.buffer[i]);
  tracer->str_db.buffer[i] = NULL;
 }
}

static int mlx5_fw_tracer_allocate_strings_db(struct mlx5_fw_tracer *tracer)
{
 u32 *string_db_size_out = tracer->str_db.size_out;
 u32 num_string_db = tracer->str_db.num_string_db;
 int i;

 for (i = 0; i < num_string_db; i++) {
  if (!string_db_size_out[i])
   continue;
  tracer->str_db.buffer[i] = kzalloc(string_db_size_out[i], GFP_KERNEL);
  if (!tracer->str_db.buffer[i])
   goto free_strings_db;
 }

 return 0;

free_strings_db:
 mlx5_fw_tracer_free_strings_db(tracer);
 return -ENOMEM;
}

static void
mlx5_fw_tracer_init_saved_traces_array(struct mlx5_fw_tracer *tracer)
{
 tracer->st_arr.saved_traces_index = 0;
 mutex_init(&tracer->st_arr.lock);
}

static void
mlx5_fw_tracer_clean_saved_traces_array(struct mlx5_fw_tracer *tracer)
{
 mutex_destroy(&tracer->st_arr.lock);
}

static void mlx5_tracer_read_strings_db(struct work_struct *work)
{
 struct mlx5_fw_tracer *tracer = container_of(work, struct mlx5_fw_tracer,
           read_fw_strings_work);
 u32 num_of_reads, num_string_db = tracer->str_db.num_string_db;
 struct mlx5_core_dev *dev = tracer->dev;
 u32 in[MLX5_ST_SZ_DW(mtrc_cap)] = {0};
 u32 leftovers, offset;
 int err = 0, i, j;
 u32 *out, outlen;
 void *out_value;

 outlen = MLX5_ST_SZ_BYTES(mtrc_stdb) + STRINGS_DB_READ_SIZE_BYTES;
 out = kzalloc(outlen, GFP_KERNEL);
 if (!out) {
  err = -ENOMEM;
  goto out;
 }

 for (i = 0; i < num_string_db; i++) {
  if (!tracer->str_db.size_out[i])
   continue;
  offset = 0;
  MLX5_SET(mtrc_stdb, in, string_db_index, i);
  num_of_reads = tracer->str_db.size_out[i] /
    STRINGS_DB_READ_SIZE_BYTES;
  leftovers = (tracer->str_db.size_out[i] %
    STRINGS_DB_READ_SIZE_BYTES) /
     STRINGS_DB_LEFTOVER_SIZE_BYTES;

  MLX5_SET(mtrc_stdb, in, read_size, STRINGS_DB_READ_SIZE_BYTES);
  for (j = 0; j < num_of_reads; j++) {
   MLX5_SET(mtrc_stdb, in, start_offset, offset);

   err = mlx5_core_access_reg(dev, in, sizeof(in), out,
         outlen, MLX5_REG_MTRC_STDB,
         0, 1);
   if (err) {
    mlx5_core_dbg(dev, "FWTracer: Failed to read strings DB %d\n",
           err);
    goto out_free;
   }

   out_value = MLX5_ADDR_OF(mtrc_stdb, out, string_db_data);
   memcpy(tracer->str_db.buffer[i] + offset, out_value,
          STRINGS_DB_READ_SIZE_BYTES);
   offset += STRINGS_DB_READ_SIZE_BYTES;
  }

  /* Strings database is aligned to 64, need to read leftovers*/
  MLX5_SET(mtrc_stdb, in, read_size,
    STRINGS_DB_LEFTOVER_SIZE_BYTES);
  for (j = 0; j < leftovers; j++) {
   MLX5_SET(mtrc_stdb, in, start_offset, offset);

   err = mlx5_core_access_reg(dev, in, sizeof(in), out,
         outlen, MLX5_REG_MTRC_STDB,
         0, 1);
   if (err) {
    mlx5_core_dbg(dev, "FWTracer: Failed to read strings DB %d\n",
           err);
    goto out_free;
   }

   out_value = MLX5_ADDR_OF(mtrc_stdb, out, string_db_data);
   memcpy(tracer->str_db.buffer[i] + offset, out_value,
          STRINGS_DB_LEFTOVER_SIZE_BYTES);
   offset += STRINGS_DB_LEFTOVER_SIZE_BYTES;
  }
 }

 tracer->str_db.loaded = true;

out_free:
 kfree(out);
out:
 return;
}

static void mlx5_fw_tracer_arm(struct mlx5_core_dev *dev)
{
 u32 out[MLX5_ST_SZ_DW(mtrc_ctrl)] = {0};
 u32 in[MLX5_ST_SZ_DW(mtrc_ctrl)] = {0};
 int err;

 MLX5_SET(mtrc_ctrl, in, arm_event, 1);

 err = mlx5_core_access_reg(dev, in, sizeof(in), out, sizeof(out),
       MLX5_REG_MTRC_CTRL, 0, 1);
 if (err)
  mlx5_core_warn(dev, "FWTracer: Failed to arm tracer event %d\n", err);
}

static const char *VAL_PARM  = "%llx";
static const char *REPLACE_64_VAL_PARM = "%x%x";
static const char *PARAM_CHAR  = "%";

static int mlx5_tracer_message_hash(u32 message_id)
{
 return jhash_1word(message_id, 0) & (MESSAGE_HASH_SIZE - 1);
}

static struct tracer_string_format *mlx5_tracer_message_insert(struct mlx5_fw_tracer *tracer,
              struct tracer_event *tracer_event)
{
 struct hlist_head *head =
  &tracer->hash[mlx5_tracer_message_hash(tracer_event->string_event.tmsn)];
 struct tracer_string_format *cur_string;

 cur_string = kzalloc(sizeof(*cur_string), GFP_KERNEL);
 if (!cur_string)
  return NULL;

 hlist_add_head(&cur_string->hlist, head);

 return cur_string;
}

static struct tracer_string_format *mlx5_tracer_get_string(struct mlx5_fw_tracer *tracer,
          struct tracer_event *tracer_event)
{
 struct tracer_string_format *cur_string;
 u32 str_ptr, offset;
 int i;

 str_ptr = tracer_event->string_event.string_param;

 for (i = 0; i < tracer->str_db.num_string_db; i++) {
  if (!tracer->str_db.size_out[i])
   continue;
  if (str_ptr > tracer->str_db.base_address_out[i] &&
      str_ptr < tracer->str_db.base_address_out[i] +
      tracer->str_db.size_out[i]) {
   offset = str_ptr - tracer->str_db.base_address_out[i];
   /* add it to the hash */
   cur_string = mlx5_tracer_message_insert(tracer, tracer_event);
   if (!cur_string)
    return NULL;
   cur_string->string = (char *)(tracer->str_db.buffer[i] +
       offset);
   return cur_string;
  }
 }

 return NULL;
}

static void mlx5_tracer_clean_message(struct tracer_string_format *str_frmt)
{
 hlist_del(&str_frmt->hlist);
 kfree(str_frmt);
}

static int mlx5_tracer_get_num_of_params(char *str)
{
 char *substr, *pstr = str;
 int num_of_params = 0;

 /* replace %llx with %x%x */
 substr = strstr(pstr, VAL_PARM);
 while (substr) {
  memcpy(substr, REPLACE_64_VAL_PARM, 4);
  pstr = substr;
  substr = strstr(pstr, VAL_PARM);
 }

 /* count all the % characters */
 substr = strstr(str, PARAM_CHAR);
 while (substr) {
  num_of_params += 1;
  str = substr + 1;
  substr = strstr(str, PARAM_CHAR);
 }

 return num_of_params;
}

static struct tracer_string_format *mlx5_tracer_message_find(struct hlist_head *head,
            u8 event_id, u32 tmsn)
{
 struct tracer_string_format *message;

 hlist_for_each_entry(message, head, hlist)
  if (message->event_id == event_id && message->tmsn == tmsn)
   return message;

 return NULL;
}

static struct tracer_string_format *mlx5_tracer_message_get(struct mlx5_fw_tracer *tracer,
           struct tracer_event *tracer_event)
{
 struct hlist_head *head =
  &tracer->hash[mlx5_tracer_message_hash(tracer_event->string_event.tmsn)];

 return mlx5_tracer_message_find(head, tracer_event->event_id, tracer_event->string_event.tmsn);
}

static void poll_trace(struct mlx5_fw_tracer *tracer,
         struct tracer_event *tracer_event, u64 *trace)
{
 u32 timestamp_low, timestamp_mid, timestamp_high, urts;

 tracer_event->event_id = MLX5_GET(tracer_event, trace, event_id);
 tracer_event->lost_event = MLX5_GET(tracer_event, trace, lost);
 tracer_event->out = trace;

 switch (tracer_event->event_id) {
 case TRACER_EVENT_TYPE_TIMESTAMP:
  tracer_event->type = TRACER_EVENT_TYPE_TIMESTAMP;
  urts = MLX5_GET(tracer_timestamp_event, trace, urts);
  if (tracer->trc_ver == 0)
   tracer_event->timestamp_event.unreliable = !!(urts >> 2);
  else
   tracer_event->timestamp_event.unreliable = !!(urts & 1);

  timestamp_low = MLX5_GET(tracer_timestamp_event,
      trace, timestamp7_0);
  timestamp_mid = MLX5_GET(tracer_timestamp_event,
      trace, timestamp39_8);
  timestamp_high = MLX5_GET(tracer_timestamp_event,
       trace, timestamp52_40);

  tracer_event->timestamp_event.timestamp =
    ((u64)timestamp_high << 40) |
    ((u64)timestamp_mid << 8) |
    (u64)timestamp_low;
  break;
 default:
  if (tracer_event->event_id >= tracer->str_db.first_string_trace &&
      tracer_event->event_id <= tracer->str_db.first_string_trace +
           tracer->str_db.num_string_trace) {
   tracer_event->type = TRACER_EVENT_TYPE_STRING;
   tracer_event->string_event.timestamp =
    MLX5_GET(tracer_string_event, trace, timestamp);
   tracer_event->string_event.string_param =
    MLX5_GET(tracer_string_event, trace, string_param);
   tracer_event->string_event.tmsn =
    MLX5_GET(tracer_string_event, trace, tmsn);
   tracer_event->string_event.tdsn =
    MLX5_GET(tracer_string_event, trace, tdsn);
  } else {
   tracer_event->type = TRACER_EVENT_TYPE_UNRECOGNIZED;
  }
  break;
 }
}

static u64 get_block_timestamp(struct mlx5_fw_tracer *tracer, u64 *ts_event)
{
 struct tracer_event tracer_event;
 u8 event_id;

 event_id = MLX5_GET(tracer_event, ts_event, event_id);

 if (event_id == TRACER_EVENT_TYPE_TIMESTAMP)
  poll_trace(tracer, &tracer_event, ts_event);
 else
  tracer_event.timestamp_event.timestamp = 0;

 return tracer_event.timestamp_event.timestamp;
}

static void mlx5_fw_tracer_clean_print_hash(struct mlx5_fw_tracer *tracer)
{
 struct tracer_string_format *str_frmt;
 struct hlist_node *n;
 int i;

 for (i = 0; i < MESSAGE_HASH_SIZE; i++) {
  hlist_for_each_entry_safe(str_frmt, n, &tracer->hash[i], hlist)
   mlx5_tracer_clean_message(str_frmt);
 }
}

static void mlx5_fw_tracer_clean_ready_list(struct mlx5_fw_tracer *tracer)
{
 struct tracer_string_format *str_frmt, *tmp_str;

 list_for_each_entry_safe(str_frmt, tmp_str, &tracer->ready_strings_list,
     list)
  list_del(&str_frmt->list);
}

static void mlx5_fw_tracer_save_trace(struct mlx5_fw_tracer *tracer,
          u64 timestamp, bool lost,
          u8 event_id, char *msg)
{
 struct mlx5_fw_trace_data *trace_data;

 mutex_lock(&tracer->st_arr.lock);
 trace_data = &tracer->st_arr.straces[tracer->st_arr.saved_traces_index];
 trace_data->timestamp = timestamp;
 trace_data->lost = lost;
 trace_data->event_id = event_id;
 strscpy_pad(trace_data->msg, msg, TRACE_STR_MSG);

 tracer->st_arr.saved_traces_index =
  (tracer->st_arr.saved_traces_index + 1) & (SAVED_TRACES_NUM - 1);
 mutex_unlock(&tracer->st_arr.lock);
}

static noinline
void mlx5_tracer_print_trace(struct tracer_string_format *str_frmt,
        struct mlx5_core_dev *dev,
        u64 trace_timestamp)
{
 char tmp[512];

 snprintf(tmp, sizeof(tmp), str_frmt->string,
   str_frmt->params[0],
   str_frmt->params[1],
   str_frmt->params[2],
   str_frmt->params[3],
   str_frmt->params[4],
   str_frmt->params[5],
   str_frmt->params[6]);

 trace_mlx5_fw(dev->tracer, trace_timestamp, str_frmt->lost,
        str_frmt->event_id, tmp);

 mlx5_fw_tracer_save_trace(dev->tracer, trace_timestamp,
      str_frmt->lost, str_frmt->event_id, tmp);

 /* remove it from hash */
 mlx5_tracer_clean_message(str_frmt);
}

static int mlx5_tracer_handle_raw_string(struct mlx5_fw_tracer *tracer,
      struct tracer_event *tracer_event)
{
 struct tracer_string_format *cur_string;

 cur_string = mlx5_tracer_message_insert(tracer, tracer_event);
 if (!cur_string)
  return -1;

 cur_string->event_id = tracer_event->event_id;
 cur_string->timestamp = tracer_event->string_event.timestamp;
 cur_string->lost = tracer_event->lost_event;
 cur_string->string = "0x%08x%08x";
 cur_string->num_of_params = 2;
 cur_string->params[0] = upper_32_bits(*tracer_event->out);
 cur_string->params[1] = lower_32_bits(*tracer_event->out);
 list_add_tail(&cur_string->list, &tracer->ready_strings_list);
 return 0;
}

static int mlx5_tracer_handle_string_trace(struct mlx5_fw_tracer *tracer,
        struct tracer_event *tracer_event)
{
 struct tracer_string_format *cur_string;

 if (tracer_event->string_event.tdsn == 0) {
  cur_string = mlx5_tracer_get_string(tracer, tracer_event);
  if (!cur_string)
   return mlx5_tracer_handle_raw_string(tracer, tracer_event);

  cur_string->num_of_params = mlx5_tracer_get_num_of_params(cur_string->string);
  cur_string->last_param_num = 0;
  cur_string->event_id = tracer_event->event_id;
  cur_string->tmsn = tracer_event->string_event.tmsn;
  cur_string->timestamp = tracer_event->string_event.timestamp;
  cur_string->lost = tracer_event->lost_event;
  if (cur_string->num_of_params == 0) /* trace with no params */
   list_add_tail(&cur_string->list, &tracer->ready_strings_list);
 } else {
  cur_string = mlx5_tracer_message_get(tracer, tracer_event);
  if (!cur_string) {
   pr_debug("%s Got string event for unknown string tmsn: %d\n",
     __func__, tracer_event->string_event.tmsn);
   return mlx5_tracer_handle_raw_string(tracer, tracer_event);
  }
  cur_string->last_param_num += 1;
  if (cur_string->last_param_num > TRACER_MAX_PARAMS) {
   pr_debug("%s Number of params exceeds the max (%d)\n",
     __func__, TRACER_MAX_PARAMS);
   list_add_tail(&cur_string->list, &tracer->ready_strings_list);
   return 0;
  }
  /* keep the new parameter */
  cur_string->params[cur_string->last_param_num - 1] =
   tracer_event->string_event.string_param;
  if (cur_string->last_param_num == cur_string->num_of_params)
   list_add_tail(&cur_string->list, &tracer->ready_strings_list);
 }

 return 0;
}

static void mlx5_tracer_handle_timestamp_trace(struct mlx5_fw_tracer *tracer,
            struct tracer_event *tracer_event)
{
 struct tracer_timestamp_event timestamp_event =
      tracer_event->timestamp_event;
 struct tracer_string_format *str_frmt, *tmp_str;
 struct mlx5_core_dev *dev = tracer->dev;
 u64 trace_timestamp;

 list_for_each_entry_safe(str_frmt, tmp_str, &tracer->ready_strings_list, list) {
  list_del(&str_frmt->list);
  if (str_frmt->timestamp < (timestamp_event.timestamp & MASK_6_0))
   trace_timestamp = (timestamp_event.timestamp & MASK_52_7) |
       (str_frmt->timestamp & MASK_6_0);
  else
   trace_timestamp = ((timestamp_event.timestamp - 1) & MASK_52_7) |
       (str_frmt->timestamp & MASK_6_0);

  mlx5_tracer_print_trace(str_frmt, dev, trace_timestamp);
 }
}

static int mlx5_tracer_handle_trace(struct mlx5_fw_tracer *tracer,
        struct tracer_event *tracer_event)
{
 if (tracer_event->type == TRACER_EVENT_TYPE_STRING) {
  mlx5_tracer_handle_string_trace(tracer, tracer_event);
 } else if (tracer_event->type == TRACER_EVENT_TYPE_TIMESTAMP) {
  if (!tracer_event->timestamp_event.unreliable)
   mlx5_tracer_handle_timestamp_trace(tracer, tracer_event);
 } else {
  pr_debug("%s Got unrecognised type %d for parsing, exiting..\n",
    __func__, tracer_event->type);
 }
 return 0;
}

static void mlx5_fw_tracer_handle_traces(struct work_struct *work)
{
 struct mlx5_fw_tracer *tracer =
   container_of(work, struct mlx5_fw_tracer, handle_traces_work);
 u64 block_timestamp, last_block_timestamp, tmp_trace_block[TRACES_PER_BLOCK];
 u32 block_count, start_offset, prev_start_offset, prev_consumer_index;
 u32 trace_event_size = MLX5_ST_SZ_BYTES(tracer_event);
 struct mlx5_core_dev *dev = tracer->dev;
 struct tracer_event tracer_event;
 int i;

 mlx5_core_dbg(dev, "FWTracer: Handle Trace event, owner=(%d)\n", tracer->owner);
 if (!tracer->owner)
  return;

 if (unlikely(!tracer->str_db.loaded))
  goto arm;

 block_count = tracer->buff.size / TRACER_BLOCK_SIZE_BYTE;
 start_offset = tracer->buff.consumer_index * TRACER_BLOCK_SIZE_BYTE;

 /* Copy the block to local buffer to avoid HW override while being processed */
 memcpy(tmp_trace_block, tracer->buff.log_buf + start_offset,
        TRACER_BLOCK_SIZE_BYTE);

 block_timestamp =
  get_block_timestamp(tracer, &tmp_trace_block[TRACES_PER_BLOCK - 1]);

 while (block_timestamp > tracer->last_timestamp) {
  /* Check block override if it's not the first block */
  if (tracer->last_timestamp) {
   u64 *ts_event;
   /* To avoid block override be the HW in case of buffer
 * wraparound, the time stamp of the previous block
 * should be compared to the last timestamp handled
 * by the driver.
 */
 *      - Redistributions of source code must *        copyright notice, this list of conditions and the *        disclaimer.
    (tracer-> * THE SOFTWARE IS ED, INCLUDING BUT NOT * MERCHANTABILITY,* NONINFRINGEMENT. IN NO EVENT * BE LIABLE FOR * ACTION OF * CONNECTION WITH THE */
 prev_start_offsetprev_consumer_indexTRACER_BLOCK_SIZE_BYTE

  ts_event  tracer->buff.log_buf+prev_start_offset +
       (TRACES_PER_BLOCK - int."
   last_block_timestamp = get_block_timestamp(tracer, ts_event;
{
hestructmlx5_core_dev =>dev
   current is  therefore
   * be.
    */
  int,i
  mlx5_core_warn,"FWTracerEvents werelost\";
    tracer->last_timestamp = block_timestamp;
    tracer->buff.consumer_index =
     (tracer->buff.consumer_index + 1) & (block_count - 1);
    break;
   }
  }

  /* Parse events */
  for (i = 0; i < TRACES_PER_BLOCK ; i++) {
   poll_trace(tracer, &tracer_event, &tmp_trace_block[i]);
   mlx5_tracer_handle_trace(tracer, &tracer_event);
  }

  tracer->buff.consumer_index =
   (tracer->buff.consumer_index + 1) & (block_count - 1);

  tracer->last_timestamp = block_timestamp;
  start_offset = tracer->buff.consumer_index * TRACER_BLOCK_SIZE_BYTE;
  memcpy(tmp_trace_block, tracer->buff.log_buf + start_offset,
         TRACER_BLOCK_SIZE_BYTE);
  block_timestamp = get_block_timestamp(tracer,
            &tmp_trace_block[TRACES_PER_BLOCK - 1]);
 }

arm:
 mlx5_fw_tracer_arm(dev);
}

static int mlx5_fw_tracer_set_mtrc_conf(struct mlx5_fw_tracer *tracer)
{
 struct mlx5_core_dev *dev = tracer->dev;
 u32 out[MLX5_ST_SZ_DW(mtrc_conf)] = {0};
 u32 in[MLX5_ST_SZ_DW(mtrc_conf)] = {0};
 int err;

 MLX5_SET(mtrc_conf, in, trace_mode, TRACE_TO_MEMORY);
 MLX5_SET(mtrc_conf, in, log_trace_buffer_size,
   ilog2(TRACER_BUFFER_PAGE_NUM));
 MLX5_SET(mtrc_conf,in trace_mkey tracer-buff);

   mlx5_core_access_reg insizeof)outsizeof),
  MLX5_REG_MTRC_CONF 0 )java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
if()
 u32[MLX5_ST_SZ_DW) ={java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39

 tracer-.consumer_index0java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
  err
}

static int mlx5_fw_tracer_set_mtrc_ctrl(struct mlx5_fw_tracer *tracer, u8 status, u8 arm)
{
 struct devtracer->;
 u32 [MLX5_ST_SZ_DW)] 0;
  [MLX5_ST_SZ_DW)]= 0;
 int err

MLX5_SETmtrc_ctrl, in modify_field_select, TRACE_STATUS);
 MLX5_SETmtrc_ctrl, in trace_status, status;
 MLX5_SET(mtrc_ctrl

 err=mlx5_core_access_reg(dev in, sizeofin,out sizeofout),
      MLX5_REG_MTRC_CTRL, 1

 if (mlx5_set_mtrc_caps_trace_owner, , sizeof(out,
  tracer-ownerfalse

 returnstruct *dev tracer-
} buff

staticintmlx5_fw_tracer_start( mlx5_fw_tracertracer)
{
 struct mlx5_core_dev *dev = tracer->dev;
 int err;

err();
 (java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
   dma_map_single,,tracer-buffsizeDMA_FROM_DEVICE)
 if(, dma {
   0
 }

 err
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  mlx5_core_warn(dev, "FWTracer:java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  goto release_ownership;
 }

 /* enable tracer & trace events */log_buf
errmlx5_fw_tracer_set_mtrc_ctrl,, )
 if(rr){
 mlx5_core_warn,": Failed to tracer %\" err;
  goto release_ownershipjava.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
 

 (, ":Ownership and active\";
 return 0;

release_ownership
 mlx5_fw_tracer_ownership_release(tracer;
 return err;
}

static void mlx5_fw_tracer_ownership_change(struct work_struct
{
 struct * java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
  (work struct, ownership_change_work

 mlx5_core_dbg(tracer->dev, "FWTracer: ownership changed, current=(%d)\n", tracer->owner);
 if (tracer-owner{
  mlx5_fw_tracer_ownership_acquire(tracer;
  return;
 }

 mlx5_fw_tracer_start(tracer);
}

static int mlx5_fw_tracer_set_core_dump_reg(struct mlx5_core_dev *dev,
        u32in int size_in)
{
u32[MLX5_ST_SZ_DWcore_dump_reg ={;

 if(MLX5_CAP_DEBUG(dev) &
     !
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 returnjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
       MLX5_REG_CORE_DUMP,,1java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
}

int mlx5_fw_tracer_trigger_core_dump_general
{
truct tracer dev-;
  inMLX5_ST_SZ_DWcore_dump_reg)  {;
 int err;

 if  if (>.uffer[i)
  return -EOPNOTSUPP;
return;
java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 16

 MLX5_SET

err  mlx5_fw_tracer_set_core_dump_regdev, , sizeofin);
   mlx5_tracer_read_strings_db work_struct *ork)
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  num_of_reads, =>.;
 flush_workqueue(tracer->work_queue);
 return0
}

static
mlx5_devlink_fmsg_fill_trace devlink_fmsgfmsg,
        struct mlx5_fw_trace_data *trace_data)
{
 devlink_fmsg_obj_nest_start
 devlink_fmsg_u64_pair_put(fmsg, "timestamp", trace_data->timestamp);
  =MLX5_ST_SZ_BYTESmtrc_stdb)+STRINGS_DB_READ_SIZE_BYTES
 devlink_fmsg_u8_pair_putfmsg,"vent_id, >vent_id);
 devlink_fmsg_string_pair_put =ENOMEM
 devlink_fmsg_obj_nest_end
}

int(structmlx5_fw_tracertracer
       structdevlink_fmsgfmsg
 num_of_reads  tracer-str_db.size_out[i] /
 struct mlx5_fw_trace_data* =tracer->st_arr;
 u32, start_indexend_index;
 u32 saved_traces_index

 if (!straces[0].timestamp)
  return -ENOMSG;

 (&racer-.lock
 saved_traces_index=tracer-.saved_traces_index;
  ([]timestamp)
  start_index   iferr{
 else
   =
 end_index

devlink_fmsg_arr_pair_nest_start fwjava.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 58
  ;
while! ) java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
  mlx5_devlink_fmsg_fill_trace(fmsg, TES)java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42

}
}

_(fmsg
 mutex_unlock

 return 0;
}

 void(work_structwork)
{
struct tracer
orkstructmlx5_fw_tracer, )

 (tracer
}

/* Create software resources (Buffers, etc ..) */
struct
{
   tracer_string_format(  *tracer
  ;

ifMLX5_CAP_MCAM_REG(devtracer_registers) java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
 mlx5_core_dbgdev,":Tracer capability presentn";
  returnif!)
 }

  =kvzallocsizeoftracerGFP_KERNEL)java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
 if(!racer
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

queue(""
if(>work_queue
  err = -ENOMEM
  goto      tracer-.base_address_out
 }

 tracer- ()

INIT_LIST_HEAD&tracer-ready_strings_list);
 INIT_WORK(&tracer-     );
 INIT_WORK&racer->read_fw_strings_work);
INIT_WORKtracer-, );
INIT_WORK>update_db_workmlx5_fw_tracer_update_db)
 mutex_init(&tracer-


 err = mlx5_query_mtrc_caps(tracerstr_frmt-)
 if 
 mlx5_core_dbg, ":Failedto %n" );
  goto destroy_workqueue *, pstr ;
 }

err=mlx5_fw_tracer_create_log_buf)
 if (err) {
  mlx5_core_warn(dev, "FWTracer: Create log buffer failed %d\n", err);
 goto;
 }

 err = mlx5_fw_tracer_allocate_strings_db(tracer);
 if (err) {
  mlx5_core_warn  /
  goto free_log_buf;
 java.lang.StringIndexOutOfBoundsException: Range [32, 2) out of bounds for length 2

 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 mlx5_core_dbg(dev, "FWTracer: struct tracer_event *tracer_event)

 return * =

free_log_buf:
 mlx5_fw_tracer_destroy_log_buf(tracer);
destroy_workqueue:
 tracer->dev = NULL;
 destroy_workqueue(tracer-)java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
free_tracer:
 kvfreetracer);
 return ERR_PTR(err);
}

notifier_block*, unsigned long action *data);

/* Create HW resources + start tracer */java.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64
int mlx5_fw_tracer_init mlx5_fw_tracer*tracer
java.lang.StringIndexOutOfBoundsException: Range [50, 1) out of bounds for length 1
 struct   if (racer->rc_ver = )
 int err;

 if (IS_ERR_OR_NULL(tracer))
  return 0;

 if (!tracer->str_db.  else
  queue_work(tracer->work_queue, &tracer->read_fw_strings_work

 mutex_lock(&    , timestamp7_0;
 if (test_and_set_bit(MLX5_TRACER_STATE_UP, &tracer->state))
  goto unlocktrace timestamp39_8)

 dev

 err =    tracer_event- <tracer-.first_string_tracejava.lang.StringIndexOutOfBoundsException: Index 67 out of bounds for length 67
 if (err  >tring_eventstring_param=
 mlx5_core_warndev,"FWTracer: Failed to PD %dn,err);
  goto err_cancel_worktracer_event->.msn
 }

 err=mlx5_fw_tracer_create_mkey(tracer;
 (err java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
  mlx5_core_warndev":Failed createmkey%\n,err)java.lang.StringIndexOutOfBoundsException: Index 67 out of bounds for length 67
  goto
 }

 MLX5_NB_INITjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
mlx5_eq_notifier_register)java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45

 err = mlx5_fw_tracer_start(tracer);
 if
  mlx5_core_warn(dev, "FWTracer:}
  err_notifier_unregister
 
unlock:
 mutex_unlock(&tracer-
 return 0;

err_notifier_unregister:
 mlx5_eq_notifier_unregister(dev, &tracer-(str_frmt
 mlx5_core_destroy_mkey
err_dealloc_pd
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
err_cancel_workvoid(tructtracer
 cancel_work_synctracer-)
   u8 event_id msg
 return err; *trace_datajava.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
}

/* Stop tracer + Cleanup HW resources */
void mlx5_fw_tracer_cleanup(struct mlx5_fw_tracer *tracer)
{
(racer-st_arr +1 SAVED_TRACES_NUM
  return;

 mutex_lock>state_lock
if(test_and_clear_bit(LX5_TRACER_STATE_UP tracer-)java.lang.StringIndexOutOfBoundsException: Index 63 out of bounds for length 63
  goto unlock;

 mlx5_core_dbg(tracer->params[2],
       tracer-owner
nregistertracer-, &>);
 cancel_work_sync(tracer-ownership_change_work);
 cancel_work_sync(&tracer-
/
  * update_db_work to finished.
  */
 

      str_frmt->lost, str_frmt->event_id, tmp);
  mlx5_fw_tracer_ownership_release(tracermlx5_tracer_clean_message(str_frmt);

ore_destroy_mkeytracer-dev,tracer-.key
 mlx5_core_dealloc_pd  struct *tracer_event
unlock
 mutex_unlock(&tracer->state_lock);
}

/* Free software resources (Buffers, etc ..) */
void mlx5_fw_tracer_destroy(struct mlx5_fw_tracer *tracer)
{
ifIS_ERR_OR_NULLtracer)
  return;

  cur_string->event_id=tracer_event-event_id

 cancel_work_synctracer-read_fw_strings_work
 mlx5_fw_tracer_clean_ready_list(tracer);
 mlx5_fw_tracer_clean_print_hash);
 mlx5_fw_tracer_clean_saved_traces_array(tracer);
 mlx5_fw_tracer_free_strings_db
 mlx5_fw_tracer_destroy_log_buf(tracer);
 mutex_destroy(&tracer->state_lock);
 destroy_workqueue(tracer->work_queue);
 struct tracer_string_format*java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}

static  returnmlx5_tracer_handle_raw_string(tracer, tracer_event)
{
 struct mlx5_core_dev
 int err;

 if (test_and_set_bit(MLX5_TRACER_RECREATE_DB, &tracer->state = 0java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
  return 0;
 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);
 mlx5_fw_tracer_free_strings_db(tracer);

 dev = tracer->dev;
 err = mlx5_query_mtrc_caps(tracer);
 if (cur_string-> = >lost_event
ev FWTracer:Failedqueryn,err)java.lang.StringIndexOutOfBoundsException: Index 73 out of bounds for length 73
  goto out


 err=mlx5_fw_tracer_allocate_strings_db(tracer;
 if (err) {
 mlx5_core_warndev "FWTracer: AllocatestringsDBfailed%\" );
  goto out;
 }
 mlx5_fw_tracer_init_saved_traces_array(tracer);
:
 clear_bit&cur_string-, tracer-ready_strings_list;
 return err;
}

int mlx5_fw_tracer_reload(struct mlx5_fw_tracer cur_string->params[>last_param_num -1 =
{
 struct mlx5_core_dev *dev
 int err;

 if (IS_ERR_OR_NULL(tracer))
  return 0;

 dev=tracer-dev
 mlx5_fw_tracer_cleanup(tracer);
 err = mlx5_fw_tracer_recreate_strings_db tracer_timestamp_event timestamp_event=
 if (err) {
  mlx5_core_warn(dev, "Failed to recreate FW tracer strings DB\n");
  return err;
 }
 err = mlx5_fw_tracer_init(tracer mlx5_core_devdev = tracer->ev
 err) {
  mlx5_core_warn(dev
  return err;
 }

 returnreturn 0;
}

static intfw_tracer_event(struct notifier_block*nb,unsignedlong action, void *ata)
{
 struct mlx5_fw_tracer*tracer =mlx5_nb_cofnb,structmlx5_fw_tracer nb;
 structmlx5_core_dev *dev= tracer->;
 struct mlx5_eqe *eqe =    

 switch(eqe->sub_type) java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
 case MLX5_TRACER_SUBTYPE_OWNERSHIP_CHANGE:
  queue_work(tracer->work_queue
  break;
 case MLX5_TRACER_SUBTYPE_TRACES_AVAILABLE:
  queue_work(tracer->work_queue, &tracer->handle_traces_work);
  breakbreak;
 case MLX5_TRACER_SUBTYPE_STRINGS_DB_UPDATE:
  queue_work(tracer->work_queue, &tracer->update_db_work);
  break;
 default:
  mlx5_core_dbg(dev,   mlx5_tracer_handle_string_trace(tracer, tracer_event);
        eqe->sub_type);;
 }

 return NOTIFY_OK;
}

EXPORT_TRACEPOINT_SYMBOL(mlx5_fw);