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iwlwifi: mvm: Add debugfs entry to generate NMI to NIC

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Writting to fw_nmi entry will set DEVICE_SET_NMI_REG (0x00a01c30)
generating NMI that halts NIC CPU.

Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Alexander Bondar <alexander.bondar@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Alexander Bondar 2013-10-17 14:26:50 +02:00 committed by Emmanuel Grumbach
parent 3961a61aad
commit 119663c360
2 changed files with 17 additions and 0 deletions
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3
drivers/net/wireless/iwlwifi/iwl-prph.h
View File

@ -102,6 +102,9 @@
/* Device system time */
#define DEVICE_SYSTEM_TIME_REG 0xA0206C
/* Device NMI register */
#define DEVICE_SET_NMI_REG 0x00a01c30
/*****************************************************************************
* 7000/3000 series SHR DTS addresses *
*****************************************************************************/

14
drivers/net/wireless/iwlwifi/mvm/debugfs.c
View File

@ -63,6 +63,7 @@
#include "mvm.h"
#include "sta.h"
#include "iwl-io.h"
#include "iwl-prph.h"
struct iwl_dbgfs_mvm_ctx {
struct iwl_mvm *mvm;
@ -804,6 +805,17 @@ static ssize_t iwl_dbgfs_fw_restart_write(struct file *file,
return count;
}
static ssize_t iwl_dbgfs_fw_nmi_write(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct iwl_mvm *mvm = file->private_data;
iwl_write_prph(mvm->trans, DEVICE_SET_NMI_REG, 1);
return count;
}
static ssize_t
iwl_dbgfs_scan_ant_rxchain_read(struct file *file,
char __user *user_buf,
@ -1168,6 +1180,7 @@ MVM_DEBUGFS_READ_FILE_OPS(bt_cmd);
MVM_DEBUGFS_READ_WRITE_FILE_OPS(disable_power_off);
MVM_DEBUGFS_READ_FILE_OPS(fw_rx_stats);
MVM_DEBUGFS_WRITE_FILE_OPS(fw_restart);
MVM_DEBUGFS_WRITE_FILE_OPS(fw_nmi);
MVM_DEBUGFS_READ_WRITE_FILE_OPS(scan_ant_rxchain);
#ifdef CONFIG_PM_SLEEP
@ -1196,6 +1209,7 @@ int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir)
S_IRUSR | S_IWUSR);
MVM_DEBUGFS_ADD_FILE(fw_rx_stats, mvm->debugfs_dir, S_IRUSR);
MVM_DEBUGFS_ADD_FILE(fw_restart, mvm->debugfs_dir, S_IWUSR);
MVM_DEBUGFS_ADD_FILE(fw_nmi, mvm->debugfs_dir, S_IWUSR);
MVM_DEBUGFS_ADD_FILE(scan_ant_rxchain, mvm->debugfs_dir,
S_IWUSR | S_IRUSR);
#ifdef CONFIG_PM_SLEEP