From: Roee Zamir <roee.zamir@xxxxxxxxx>
New function, reveals the diff between gp2 and host time.
Signed-off-by: Roee Zamir <roee.zamir@xxxxxxxxx>
Signed-off-by: Luca Coelho <luciano.coelho@xxxxxxxxx>
---
Sorry, I was missing a compilation flag in my .config and missed a
compilation error detected by kbuild-bot. Here's the fix.
In v2:
* added a helper function that was missing
Luca.
.../net/wireless/intel/iwlwifi/mvm/debugfs-vif.c | 26 ++++++++++++++++++++++
drivers/net/wireless/intel/iwlwifi/mvm/mvm.h | 1 +
drivers/net/wireless/intel/iwlwifi/mvm/utils.c | 22 ++++++++++++++++++
3 files changed, 49 insertions(+)
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs-vif.c b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs-vif.c
index b232717..8ff1921 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs-vif.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs-vif.c
@@ -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)
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index e68a2bd..b7cfdcb 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -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,
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
index 7c138fe..9e366e2 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
@@ -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)
--
2.9.3
