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/******************************************************************************
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
* Copyright(c) 2016 - 2017 Intel Deutschland GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program.
*
* The full GNU General Public License is included in this distribution
* in the file called COPYING.
*
* Contact Information:
* Intel Linux Wireless <linuxwifi@intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
* BSD LICENSE
*
* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
* Copyright(c) 2016 - 2017 Intel Deutschland GmbH
* All rights reserved.
*
* 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.
* * Neither the name Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*****************************************************************************/
#include "api/commands.h"
#include "debugfs.h"
#define FWRT_DEBUGFS_READ_FILE_OPS(name) \
static ssize_t iwl_dbgfs_##name##_read(struct iwl_fw_runtime *fwrt, \
char *buf, size_t count, \
loff_t *ppos); \
static const struct file_operations iwl_dbgfs_##name##_ops = { \
.read = iwl_dbgfs_##name##_read, \
.open = simple_open, \
.llseek = generic_file_llseek, \
}
#define FWRT_DEBUGFS_WRITE_WRAPPER(name, buflen) \
static ssize_t iwl_dbgfs_##name##_write(struct iwl_fw_runtime *fwrt, \
char *buf, size_t count, \
loff_t *ppos); \
static ssize_t _iwl_dbgfs_##name##_write(struct file *file, \
const char __user *user_buf, \
size_t count, loff_t *ppos) \
{ \
struct iwl_fw_runtime *fwrt = file->private_data; \
char buf[buflen] = {}; \
size_t buf_size = min(count, sizeof(buf) - 1); \
\
if (copy_from_user(buf, user_buf, buf_size)) \
return -EFAULT; \
\
return iwl_dbgfs_##name##_write(fwrt, buf, buf_size, ppos); \
}
#define FWRT_DEBUGFS_READ_WRITE_FILE_OPS(name, buflen) \
FWRT_DEBUGFS_WRITE_WRAPPER(name, buflen) \
static const struct file_operations iwl_dbgfs_##name##_ops = { \
.write = _iwl_dbgfs_##name##_write, \
.read = iwl_dbgfs_##name##_read, \
.open = simple_open, \
.llseek = generic_file_llseek, \
}
#define FWRT_DEBUGFS_WRITE_FILE_OPS(name, buflen) \
FWRT_DEBUGFS_WRITE_WRAPPER(name, buflen) \
static const struct file_operations iwl_dbgfs_##name##_ops = { \
.write = _iwl_dbgfs_##name##_write, \
.open = simple_open, \
.llseek = generic_file_llseek, \
}
#define FWRT_DEBUGFS_ADD_FILE_ALIAS(alias, name, parent, mode) do { \
if (!debugfs_create_file(alias, mode, parent, fwrt, \
&iwl_dbgfs_##name##_ops)) \
goto err; \
} while (0)
#define FWRT_DEBUGFS_ADD_FILE(name, parent, mode) \
FWRT_DEBUGFS_ADD_FILE_ALIAS(#name, name, parent, mode)
static int iwl_fw_send_timestamp_marker_cmd(struct iwl_fw_runtime *fwrt)
{
struct iwl_mvm_marker marker = {
.dw_len = sizeof(struct iwl_mvm_marker) / 4,
.marker_id = MARKER_ID_SYNC_CLOCK,
/* the real timestamp is taken from the ftrace clock
* this is for finding the match between fw and kernel logs
*/
.timestamp = cpu_to_le64(fwrt->timestamp.seq++),
};
struct iwl_host_cmd hcmd = {
.id = MARKER_CMD,
.flags = CMD_ASYNC,
.data[0] = &marker,
.len[0] = sizeof(marker),
};
return iwl_trans_send_cmd(fwrt->trans, &hcmd);
}
static void iwl_fw_timestamp_marker_wk(struct work_struct *work)
{
int ret;
struct iwl_fw_runtime *fwrt =
container_of(work, struct iwl_fw_runtime, timestamp.wk.work);
unsigned long delay = fwrt->timestamp.delay;
ret = iwl_fw_send_timestamp_marker_cmd(fwrt);
if (!ret && delay)
schedule_delayed_work(&fwrt->timestamp.wk,
round_jiffies_relative(delay));
else
IWL_INFO(fwrt,
"stopping timestamp_marker, ret: %d, delay: %u\n",
ret, jiffies_to_msecs(delay) / 1000);
}
static ssize_t iwl_dbgfs_timestamp_marker_write(struct iwl_fw_runtime *fwrt,
char *buf, size_t count,
loff_t *ppos)
{
int ret;
u32 delay;
ret = kstrtou32(buf, 10, &delay);
if (ret < 0)
return ret;
IWL_INFO(fwrt,
"starting timestamp_marker trigger with delay: %us\n",
delay);
iwl_fw_cancel_timestamp(fwrt);
fwrt->timestamp.delay = msecs_to_jiffies(delay * 1000);
schedule_delayed_work(&fwrt->timestamp.wk,
round_jiffies_relative(fwrt->timestamp.delay));
return count;
}
FWRT_DEBUGFS_WRITE_FILE_OPS(timestamp_marker, 10);
int iwl_fwrt_dbgfs_register(struct iwl_fw_runtime *fwrt,
struct dentry *dbgfs_dir)
{
INIT_DELAYED_WORK(&fwrt->timestamp.wk, iwl_fw_timestamp_marker_wk);
FWRT_DEBUGFS_ADD_FILE(timestamp_marker, dbgfs_dir, S_IWUSR);
return 0;
err:
IWL_ERR(fwrt, "Can't create the fwrt debugfs directory\n");
return -ENOMEM;
}
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