iwlwifi: mvm: allow to force reduced tx power from debugfs

This will be useful during tests done on the physical layer.

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

diff --git a/drivers/net/wireless/iwlwifi/mvm/bt-coex.c b/drivers/net/wireless/iwlwifi/mvm/bt-coex.c
index ed20f4e..9649a43 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/bt-coex.c
+++ b/drivers/net/wireless/iwlwifi/mvm/bt-coex.c
@@ -489,8 +489,7 @@ static int iwl_mvm_bt_udpate_ctrl_kill_msk(struct iwl_mvm *mvm,
        return ret;
 }
 
-static int iwl_mvm_bt_coex_reduced_txp(struct iwl_mvm *mvm, u8 sta_id,
-                                      bool enable)
+int iwl_mvm_bt_coex_reduced_txp(struct iwl_mvm *mvm, u8 sta_id, bool enable)
 {
        struct iwl_bt_coex_cmd *bt_cmd;
        /* Send ASYNC since this can be sent from an atomic context */
@@ -508,7 +507,8 @@ static int iwl_mvm_bt_coex_reduced_txp(struct iwl_mvm *mvm, u8 sta_id,
                return 0;
 
        /* nothing to do */
-       if (mvmsta->bt_reduced_txpower == enable)
+       if (mvmsta->bt_reduced_txpower_dbg ||
+           mvmsta->bt_reduced_txpower == enable)
                return 0;
 
        bt_cmd = kzalloc(sizeof(*bt_cmd), GFP_ATOMIC);

diff --git a/drivers/net/wireless/iwlwifi/mvm/debugfs-vif.c b/drivers/net/wireless/iwlwifi/mvm/debugfs-vif.c
index 19ecade..9194709 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/debugfs-vif.c
+++ b/drivers/net/wireless/iwlwifi/mvm/debugfs-vif.c
@@ -249,9 +249,10 @@ static ssize_t iwl_dbgfs_mac_params_read(struct file *file,
                        struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
 
                        pos += scnprintf(buf+pos, bufsz-pos,
-                                        "ap_sta_id %d - reduced Tx power %d\n",
+                                        "ap_sta_id %d - reduced Tx power %d force %d\n",
                                         ap_sta_id,
-                                        mvm_sta->bt_reduced_txpower);
+                                        mvm_sta->bt_reduced_txpower,
+                                        mvm_sta->bt_reduced_txpower_dbg);
                }
        }
 
@@ -269,6 +270,36 @@ static ssize_t iwl_dbgfs_mac_params_read(struct file *file,
        return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 }
 
+static ssize_t iwl_dbgfs_reduced_txp_write(struct ieee80211_vif *vif,
+                                          char *buf, size_t count,
+                                          loff_t *ppos)
+{
+       struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+       struct iwl_mvm *mvm = mvmvif->mvm;
+       struct iwl_mvm_sta *mvmsta;
+       bool reduced_tx_power;
+       int ret;
+
+       if (mvmvif->ap_sta_id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))
+               return -ENOTCONN;
+
+       if (strtobool(buf, &reduced_tx_power) != 0)
+               return -EINVAL;
+
+       mutex_lock(&mvm->mutex);
+
+       mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
+       mvmsta->bt_reduced_txpower_dbg = false;
+       ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id,
+                                         reduced_tx_power);
+       if (!ret)
+               mvmsta->bt_reduced_txpower_dbg = true;
+
+       mutex_unlock(&mvm->mutex);
+
+       return ret ? : count;
+}
+
 static void iwl_dbgfs_update_bf(struct ieee80211_vif *vif,
                                enum iwl_dbgfs_bf_mask param, int value)
 {
@@ -509,6 +540,7 @@ MVM_DEBUGFS_READ_FILE_OPS(mac_params);
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(pm_params, 32);
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(bf_params, 256);
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(low_latency, 10);
+MVM_DEBUGFS_WRITE_FILE_OPS(reduced_txp, 10);
 
 void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 {
@@ -539,8 +571,8 @@ void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
                MVM_DEBUGFS_ADD_FILE_VIF(pm_params, mvmvif->dbgfs_dir, S_IWUSR |
                                         S_IRUSR);
 
-       MVM_DEBUGFS_ADD_FILE_VIF(mac_params, mvmvif->dbgfs_dir,
-                                S_IRUSR);
+       MVM_DEBUGFS_ADD_FILE_VIF(mac_params, mvmvif->dbgfs_dir, S_IRUSR);
+       MVM_DEBUGFS_ADD_FILE_VIF(reduced_txp, mvmvif->dbgfs_dir, S_IWUSR);
        MVM_DEBUGFS_ADD_FILE_VIF(low_latency, mvmvif->dbgfs_dir,
                                 S_IRUSR | S_IWUSR);
 

diff --git a/drivers/net/wireless/iwlwifi/mvm/mvm.h b/drivers/net/wireless/iwlwifi/mvm/mvm.h
index 43f13ab..80052d9 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/iwlwifi/mvm/mvm.h
@@ -888,6 +888,7 @@ u16 iwl_mvm_bt_coex_agg_time_limit(struct iwl_mvm *mvm,
                                   struct ieee80211_sta *sta);
 bool iwl_mvm_bt_coex_is_mimo_allowed(struct iwl_mvm *mvm,
                                     struct ieee80211_sta *sta);
+int iwl_mvm_bt_coex_reduced_txp(struct iwl_mvm *mvm, u8 sta_id, bool enable);
 
 enum iwl_bt_kill_msk {
        BT_KILL_MSK_DEFAULT,

diff --git a/drivers/net/wireless/iwlwifi/mvm/sta.h b/drivers/net/wireless/iwlwifi/mvm/sta.h
index 64f9a1b..5ecabdd 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/sta.h
+++ b/drivers/net/wireless/iwlwifi/mvm/sta.h
@@ -284,6 +284,8 @@ static inline u16 iwl_mvm_tid_queued(struct iwl_mvm_tid_data *tid_data)
  * @tid_disable_agg: bitmap: if bit(tid) is set, the fw won't send ampdus for
  *     tid.
  * @max_agg_bufsize: the maximal size of the AGG buffer for this station
+ * @bt_reduced_txpower_dbg: debug mode in which %bt_reduced_txpower is forced
+ *     by debugfs.
  * @bt_reduced_txpower: is reduced tx power enabled for this station
  * @next_status_eosp: the next reclaimed packet is a PS-Poll response and
  *     we need to signal the EOSP
@@ -304,6 +306,7 @@ struct iwl_mvm_sta {
        u32 mac_id_n_color;
        u16 tid_disable_agg;
        u8 max_agg_bufsize;
+       bool bt_reduced_txpower_dbg;
        bool bt_reduced_txpower;
        bool next_status_eosp;
        spinlock_t lock;