iwlwifi: mvm: add debugfs entry with the number of net-detect scans

Our testers need to know the number of scans performed while in
net-detect mode before the device wakes up.  The firmware already
passes this information to the driver, so we can save it and report it
in a debugfs entry.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

3 files changed, 8 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/mvm/d3.c b/drivers/net/wireless/iwlwifi/mvm/d3.c
index e730ea2b0812..a6c48c7b1e16 100644
--- a/drivers/net/wireless/iwlwifi/mvm/d3.c
+++ b/drivers/net/wireless/iwlwifi/mvm/d3.c
@@ -1726,6 +1726,10 @@ iwl_mvm_netdetect_query_results(struct iwl_mvm *mvm,
         results->matched_profiles = le32_to_cpu(query->matched_profiles);
         memcpy(results->matches, query->matches, sizeof(results->matches));
 
+#ifdef CPTCFG_IWLWIFI_DEBUGFS
+        mvm->last_netdetect_scans = le32_to_cpu(query->n_scans_done);
+#endif
+
 out_free_resp:
         iwl_free_resp(&cmd);
         return ret;
diff --git a/drivers/net/wireless/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/iwlwifi/mvm/debugfs.c
index 01b97a0c88dc..9ac04c1ea706 100644
--- a/drivers/net/wireless/iwlwifi/mvm/debugfs.c
+++ b/drivers/net/wireless/iwlwifi/mvm/debugfs.c
@@ -1569,6 +1569,9 @@ int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir)
         if (!debugfs_create_bool("d3_wake_sysassert", S_IRUSR | S_IWUSR,
                                  mvm->debugfs_dir, &mvm->d3_wake_sysassert))
                 goto err;
+        if (!debugfs_create_u32("last_netdetect_scans", S_IRUSR,
+                                mvm->debugfs_dir, &mvm->last_netdetect_scans))
+                goto err;
         MVM_DEBUGFS_ADD_FILE(netdetect, mvm->debugfs_dir, S_IRUSR | S_IWUSR);
 #endif
 
diff --git a/drivers/net/wireless/iwlwifi/mvm/mvm.h b/drivers/net/wireless/iwlwifi/mvm/mvm.h
index 3513f27c888f..a3f2078e8dcd 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/iwlwifi/mvm/mvm.h
@@ -748,6 +748,7 @@ struct iwl_mvm {
         void *d3_resume_sram;
         u32 d3_test_pme_ptr;
         struct ieee80211_vif *keep_vif;
+        u32 last_netdetect_scans; /* no. of scans in the last net-detect wake */
 #endif
 #endif