diff options
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/fw/debugfs.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/fw/debugfs.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/debugfs.c b/drivers/net/wireless/intel/iwlwifi/fw/debugfs.c new file mode 100644 index 000000000000..e2ded29a145d --- /dev/null +++ b/drivers/net/wireless/intel/iwlwifi/fw/debugfs.c @@ -0,0 +1,195 @@ +/****************************************************************************** + * + * 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; +} |