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iwlwifi: mvm: Add debugfs function for clocks diff 

New function, reveals the diff between gp2 and host time.

Signed-off-by: Roee Zamir <roee.zamir@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Roee Zamir 2016-08-02 13:55:13 +03:00 committed by Luca Coelho
parent 5a41a86c52
commit b3bee580b1
3 changed files with 49 additions and 0 deletions
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26
drivers/net/wireless/intel/iwlwifi/mvm/debugfs-vif.c
View File

@ -504,6 +504,28 @@ static inline char *iwl_dbgfs_is_match(char *name, char *buf)
return !strncmp(name, buf, len) ? buf + len : NULL;
}
static ssize_t iwl_dbgfs_os_device_timediff_read(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ieee80211_vif *vif = file->private_data;
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm *mvm = mvmvif->mvm;
u32 curr_gp2;
u64 curr_os;
s64 diff;
char buf[64];
const size_t bufsz = sizeof(buf);
int pos = 0;
iwl_mvm_get_sync_time(mvm, &curr_gp2, &curr_os);
do_div(curr_os, NSEC_PER_USEC);
diff = curr_os - curr_gp2;
pos += scnprintf(buf + pos, bufsz - pos, "diff=%lld\n", diff);
return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
}
static ssize_t iwl_dbgfs_tof_enable_write(struct ieee80211_vif *vif,
char *buf,
size_t count, loff_t *ppos)
@ -1530,6 +1552,8 @@ MVM_DEBUGFS_READ_FILE_OPS(tof_range_response);
MVM_DEBUGFS_READ_WRITE_FILE_OPS(tof_responder_params, 32);
MVM_DEBUGFS_READ_WRITE_FILE_OPS(quota_min, 32);
MVM_DEBUGFS_WRITE_FILE_OPS(lqm_send_cmd, 64);
MVM_DEBUGFS_READ_FILE_OPS(os_device_timediff);
void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
@ -1570,6 +1594,8 @@ void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
MVM_DEBUGFS_ADD_FILE_VIF(quota_min, mvmvif->dbgfs_dir,
S_IRUSR | S_IWUSR);
MVM_DEBUGFS_ADD_FILE_VIF(lqm_send_cmd, mvmvif->dbgfs_dir, S_IWUSR);
MVM_DEBUGFS_ADD_FILE_VIF(os_device_timediff,
mvmvif->dbgfs_dir, S_IRUSR);
if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
mvmvif == mvm->bf_allowed_vif)

1
drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
View File

@ -1268,6 +1268,7 @@ u8 iwl_mvm_mac80211_idx_to_hwrate(int rate_idx);
void iwl_mvm_dump_nic_error_log(struct iwl_mvm *mvm);
u8 first_antenna(u8 mask);
u8 iwl_mvm_next_antenna(struct iwl_mvm *mvm, u8 valid, u8 last_idx);
void iwl_mvm_get_sync_time(struct iwl_mvm *mvm, u32 *gp2, u64 *boottime);
/* Tx / Host Commands */
int __must_check iwl_mvm_send_cmd(struct iwl_mvm *mvm,

22
drivers/net/wireless/intel/iwlwifi/mvm/utils.c
View File

@ -1225,6 +1225,28 @@ void iwl_mvm_inactivity_check(struct iwl_mvm *mvm)
rcu_read_unlock();
}
void iwl_mvm_get_sync_time(struct iwl_mvm *mvm, u32 *gp2, u64 *boottime)
{
bool ps_disabled;
lockdep_assert_held(&mvm->mutex);
/* Disable power save when reading GP2 */
ps_disabled = mvm->ps_disabled;
if (!ps_disabled) {
mvm->ps_disabled = true;
iwl_mvm_power_update_device(mvm);
}
*gp2 = iwl_read_prph(mvm->trans, DEVICE_SYSTEM_TIME_REG);
*boottime = ktime_get_boot_ns();
if (!ps_disabled) {
mvm->ps_disabled = ps_disabled;
iwl_mvm_power_update_device(mvm);
}
}
int iwl_mvm_send_lqm_cmd(struct ieee80211_vif *vif,
enum iwl_lqm_cmd_operatrions operation,
u32 duration, u32 timeout)