iwlwifi: mvm: rs: new rate scale API - add debugfs hooks

This patch adds basic debugfs hooks for rate scaling.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

1 files changed, 72 insertions, 0 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
index dad18a609d9a..366fa75f9091 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
@@ -425,6 +425,49 @@ static ssize_t iwl_dbgfs_stations_read(struct file *file, char __user *user_buf,
 	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 }
 
+static ssize_t iwl_dbgfs_rs_data_read(struct file *file, char __user *user_buf,
+				      size_t count, loff_t *ppos)
+{
+	struct ieee80211_sta *sta = file->private_data;
+	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
+	struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw;
+	struct iwl_mvm *mvm = lq_sta->pers.drv;
+	static const size_t bufsz = 2048;
+	char *buff;
+	int desc = 0;
+	ssize_t ret;
+
+	buff = kmalloc(bufsz, GFP_KERNEL);
+	if (!buff)
+		return -ENOMEM;
+
+	mutex_lock(&mvm->mutex);
+
+	desc += scnprintf(buff + desc, bufsz - desc, "sta_id %d\n",
+			  lq_sta->pers.sta_id);
+	desc += scnprintf(buff + desc, bufsz - desc,
+			  "fixed rate 0x%X\n",
+			  lq_sta->pers.dbg_fixed_rate);
+	desc += scnprintf(buff + desc, bufsz - desc,
+			  "A-MPDU size limit %d\n",
+			  lq_sta->pers.dbg_agg_frame_count_lim);
+	desc += scnprintf(buff + desc, bufsz - desc,
+			  "valid_tx_ant %s%s%s\n",
+		(iwl_mvm_get_valid_tx_ant(mvm) & ANT_A) ? "ANT_A," : "",
+		(iwl_mvm_get_valid_tx_ant(mvm) & ANT_B) ? "ANT_B," : "",
+		(iwl_mvm_get_valid_tx_ant(mvm) & ANT_C) ? "ANT_C" : "");
+	desc += scnprintf(buff + desc, bufsz - desc,
+			  "last tx rate=0x%X ",
+			  lq_sta->last_rate_n_flags);
+
+	desc += rs_pretty_print_rate(buff + desc, lq_sta->last_rate_n_flags);
+	mutex_unlock(&mvm->mutex);
+
+	ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
+	kfree(buff);
+	return ret;
+}
+
 static ssize_t iwl_dbgfs_disable_power_off_read(struct file *file,
 						char __user *user_buf,
 						size_t count, loff_t *ppos)
@@ -1597,6 +1640,19 @@ static ssize_t iwl_dbgfs_d0i3_refs_write(struct iwl_mvm *mvm, char *buf,
 #define MVM_DEBUGFS_ADD_FILE(name, parent, mode) \
 	MVM_DEBUGFS_ADD_FILE_ALIAS(#name, name, parent, mode)
 
+#define MVM_DEBUGFS_WRITE_STA_FILE_OPS(name, bufsz) \
+	_MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct ieee80211_sta)
+#define MVM_DEBUGFS_READ_WRITE_STA_FILE_OPS(name, bufsz) \
+	_MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct ieee80211_sta)
+
+#define MVM_DEBUGFS_ADD_STA_FILE_ALIAS(alias, name, parent, mode) do {	\
+		if (!debugfs_create_file(alias, mode, parent, sta,	\
+					 &iwl_dbgfs_##name##_ops))	\
+			goto err;					\
+	} while (0)
+#define MVM_DEBUGFS_ADD_STA_FILE(name, parent, mode) \
+	MVM_DEBUGFS_ADD_STA_FILE_ALIAS(#name, name, parent, mode)
+
 static ssize_t
 iwl_dbgfs_prph_reg_read(struct file *file,
 			char __user *user_buf,
@@ -1681,6 +1737,7 @@ MVM_DEBUGFS_READ_WRITE_FILE_OPS(sram, 64);
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(set_nic_temperature, 64);
 MVM_DEBUGFS_READ_FILE_OPS(nic_temp);
 MVM_DEBUGFS_READ_FILE_OPS(stations);
+MVM_DEBUGFS_READ_FILE_OPS(rs_data);
 MVM_DEBUGFS_READ_FILE_OPS(bt_notif);
 MVM_DEBUGFS_READ_FILE_OPS(bt_cmd);
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(disable_power_off, 64);
@@ -1845,6 +1902,21 @@ static const struct file_operations iwl_dbgfs_mem_ops = {
 	.llseek = default_llseek,
 };
 
+void iwl_mvm_sta_add_debugfs(struct ieee80211_hw *hw,
+			     struct ieee80211_vif *vif,
+			     struct ieee80211_sta *sta,
+			     struct dentry *dir)
+{
+	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
+
+	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TLC_OFFLOAD))
+		MVM_DEBUGFS_ADD_STA_FILE(rs_data, dir, S_IRUSR);
+
+	return;
+err:
+	IWL_ERR(mvm, "Can't create the mvm station debugfs entry\n");
+}
+
 int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir)
 {
 	struct dentry *bcast_dir __maybe_unused;