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iwlwifi: mvm/pcie: capture last commands on firmware error

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When a firmware error occurs, capture the last 32 commands
(which are still in memory) in the error dump debugfs file.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Johannes Berg
2014-04-24 10:41:31 +02:00
committed by Emmanuel Grumbach
parent 83f32a4b4a
commit 4d075007d6
7 changed files with 152 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/wireless/iwlwifi/mvm/debugfs.c
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@@ -67,7 +67,7 @@
#include "iwl-io.h"
#include "iwl-prph.h"
#include "debugfs.h"
#include "fw-error-dump.h"
#include "iwl-fw-error-dump.h"
static ssize_t iwl_dbgfs_tx_flush_write(struct iwl_mvm *mvm, char *buf,
size_t count, loff_t *ppos)

108
drivers/net/wireless/iwlwifi/mvm/fw-error-dump.h
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@@ -1,108 +0,0 @@
/******************************************************************************
*
* 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) 2014 Intel Corporation. All rights reserved.
*
* 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; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
* USA
*
* The full GNU General Public License is included in this distribution
* in the file called COPYING.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
* BSD LICENSE
*
* Copyright(c) 2014 Intel Corporation. All rights reserved.
* 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.
*****************************************************************************/
#ifndef __fw_error_dump_h__
#define __fw_error_dump_h__
#include <linux/types.h>
#define IWL_FW_ERROR_DUMP_BARKER 0x14789632
/**
* enum iwl_fw_error_dump_type - types of data in the dump file
* @IWL_FW_ERROR_DUMP_SRAM:
* @IWL_FW_ERROR_DUMP_REG:
* @IWL_FW_ERROR_DUMP_RXF:
*/
enum iwl_fw_error_dump_type {
IWL_FW_ERROR_DUMP_SRAM = 0,
IWL_FW_ERROR_DUMP_REG = 1,
IWL_FW_ERROR_DUMP_RXF = 2,
IWL_FW_ERROR_DUMP_MAX,
};
/**
* struct iwl_fw_error_dump_data - data for one type
* @type: %enum iwl_fw_error_dump_type
* @len: the length starting from %data - must be a multiplier of 4.
* @data: the data itself padded to be a multiplier of 4.
*/
struct iwl_fw_error_dump_data {
__le32 type;
__le32 len;
__u8 data[];
} __packed;
/**
* struct iwl_fw_error_dump_file - the layout of the header of the file
* @barker: must be %IWL_FW_ERROR_DUMP_BARKER
* @file_len: the length of all the file starting from %barker
* @data: array of %struct iwl_fw_error_dump_data
*/
struct iwl_fw_error_dump_file {
__le32 barker;
__le32 file_len;
u8 data[0];
} __packed;
#endif /* __fw_error_dump_h__ */

18
drivers/net/wireless/iwlwifi/mvm/ops.c
View File

@@ -79,8 +79,8 @@
#include "iwl-prph.h"
#include "rs.h"
#include "fw-api-scan.h"
#include "fw-error-dump.h"
#include "time-event.h"
#include "iwl-fw-error-dump.h"
/*
* module name, copyright, version, etc.
@@ -822,6 +822,7 @@ void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
struct iwl_fw_error_dump_file *dump_file;
struct iwl_fw_error_dump_data *dump_data;
u32 file_len;
u32 trans_len;
lockdep_assert_held(&mvm->mutex);
@@ -833,6 +834,10 @@ void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
sizeof(*dump_file) +
sizeof(*dump_data) * 2;
trans_len = iwl_trans_dump_data(mvm->trans, NULL, 0);
if (trans_len)
file_len += trans_len;
dump_file = vmalloc(file_len);
if (!dump_file)
return;
@@ -846,7 +851,7 @@ void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
dump_data->len = cpu_to_le32(mvm->fw_error_rxf_len);
memcpy(dump_data->data, mvm->fw_error_rxf, mvm->fw_error_rxf_len);
dump_data = (void *)((u8 *)dump_data->data + mvm->fw_error_rxf_len);
dump_data = iwl_mvm_fw_error_next_data(dump_data);
dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
dump_data->len = cpu_to_le32(mvm->fw_error_sram_len);
@@ -864,6 +869,15 @@ void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
kfree(mvm->fw_error_sram);
mvm->fw_error_sram = NULL;
mvm->fw_error_sram_len = 0;
if (trans_len) {
void *buf = iwl_mvm_fw_error_next_data(dump_data);
u32 real_trans_len = iwl_trans_dump_data(mvm->trans, buf,
trans_len);
dump_data = (void *)((u8 *)buf + real_trans_len);
dump_file->file_len =
cpu_to_le32(file_len - trans_len + real_trans_len);
}
}
#endif