| /****************************************************************************** |
| * |
| * Copyright(c) 2017 Intel Deutschland GmbH |
| * Copyright (C) 2018 Intel Corporation |
| * 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 "fw/dbg.h" |
| #include "xvt.h" |
| |
| #define XVT_DEBUGFS_WRITE_WRAPPER(name, buflen, argtype) \ |
| static ssize_t _iwl_dbgfs_##name##_write(struct file* file, const char __user* user_buf, \ |
| size_t count, loff_t* ppos) { \ |
| argtype* arg = 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(arg, buf, buf_size, ppos); \ |
| } |
| |
| #define _XVT_DEBUGFS_WRITE_FILE_OPS(name, buflen, argtype) \ |
| XVT_DEBUGFS_WRITE_WRAPPER(name, buflen, argtype) \ |
| static const struct file_operations iwl_dbgfs_##name##_ops = { \ |
| .write = _iwl_dbgfs_##name##_write, \ |
| .open = simple_open, \ |
| .llseek = generic_file_llseek, \ |
| } |
| |
| #define XVT_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \ |
| _XVT_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct iwl_xvt) |
| |
| #define XVT_DEBUGFS_ADD_FILE_ALIAS(alias, name, parent, mode) \ |
| do { \ |
| if (!debugfs_create_file(alias, mode, parent, xvt, &iwl_dbgfs_##name##_ops)) \ |
| goto err; \ |
| } while (0) |
| |
| #define XVT_DEBUGFS_ADD_FILE(name, parent, mode) \ |
| XVT_DEBUGFS_ADD_FILE_ALIAS(#name, name, parent, mode) |
| |
| static ssize_t iwl_dbgfs_fw_dbg_collect_write(struct iwl_xvt* xvt, char* buf, size_t count, |
| loff_t* ppos) { |
| if (!(xvt->state == IWL_XVT_STATE_OPERATIONAL && xvt->fw_running)) { |
| return -EIO; |
| } |
| |
| if (count == 0) { |
| return 0; |
| } |
| |
| iwl_fw_dbg_collect(&xvt->fwrt, FW_DBG_TRIGGER_USER, buf, (count - 1)); |
| |
| return count; |
| } |
| |
| static ssize_t iwl_dbgfs_fw_restart_write(struct iwl_xvt* xvt, char* buf, size_t count, |
| loff_t* ppos) { |
| int __maybe_unused ret; |
| |
| if (!xvt->fw_running) { |
| return -EIO; |
| } |
| |
| mutex_lock(&xvt->mutex); |
| |
| /* Take the return value, though failure is expected, for compilation */ |
| ret = iwl_xvt_send_cmd_pdu(xvt, REPLY_ERROR, 0, 0, NULL); |
| |
| mutex_unlock(&xvt->mutex); |
| |
| return count; |
| } |
| |
| /* Device wide debugfs entries */ |
| XVT_DEBUGFS_WRITE_FILE_OPS(fw_dbg_collect, 64); |
| XVT_DEBUGFS_WRITE_FILE_OPS(fw_restart, 10); |
| |
| #ifdef CPTCFG_IWLWIFI_DEBUGFS |
| int iwl_xvt_dbgfs_register(struct iwl_xvt* xvt, struct dentry* dbgfs_dir) { |
| xvt->debugfs_dir = dbgfs_dir; |
| |
| XVT_DEBUGFS_ADD_FILE(fw_dbg_collect, xvt->debugfs_dir, S_IWUSR); |
| XVT_DEBUGFS_ADD_FILE(fw_restart, xvt->debugfs_dir, S_IWUSR); |
| |
| return 0; |
| err: |
| IWL_ERR(xvt, "Can't create the xvt debugfs directory\n"); |
| return -ENOMEM; |
| } |
| #endif /* CPTCFG_IWLWIFI_DEBUGFS */ |