ath11k: add debugfs for TWT debug calls

New debugfs files to manually add/delete/pause/resume TWT
dialogs for test/debug purposes.

The debugfs files expect the following parameters
- Add dialog
echo '<Peer_MAC> <Dialog_ID> <Wake_Interval_Usec> <Wake_Interval_Mantis>
 <Wake_Duration_Usec> <First_SP_Offset> <TWT_Command>
 <1:Broadcast /0:Individual> <1:Triggered / 0:Untriggered>
 <1:Unannounced /0:Announced> <1:Protected / 0:Unprotected>' >
 /sys/kernel/debug/ieee80211/phyX/netdev:wlanX/twt/add_dialog

Example (Non-triggered and un-announced):
echo '00:03:7F:20:13:52 1 102400 100 30720 20480 4 0 0 1 0' >
 /sys/kernel/debug/ieee80211/phy0/netdev:wlan0/twt/add_dialog

- Delete dialog
echo '<Peer_MAC> <Dialog_ID>' >
 /sys/kernel/debug/ieee80211/phyX/netdev:wlanX/twt/del_dialog

- Pause dialog
echo '<Peer_MAC> <Dialog_ID>' >
 /sys/kernel/debug/ieee80211/phyX/netdev:wlanX/twt/pause_dialog

- Resume dialog
echo '<Peer_MAC> <Dialog_ID> <SP_Offset_Usec> <Next_TWT_Size>' >
 /sys/kernel/debug/ieee80211/phyX/netdev:wlanX/twt/resume_dialog

Example:
echo '00:03:7F:20:13:52 1 2000000 3' >
 /sys/kernel/debug/ieee80211/phy0/netdev:wlan0/twt/resume_dialog

Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.5.0.1-01179-QCAHKSWPL_SILICONZ-1
Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: Aloka Dixit <alokad@codeaurora.org>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220131031043.1295-2-alokad@codeaurora.org

drivers/net/wireless/ath/ath11k/core.h

@@ -263,6 +263,9 @@ struct ath11k_vif {
 	bool bcca_zero_sent;
 	bool do_not_send_tmpl;
 	struct ieee80211_chanctx_conf chanctx;
+#ifdef CONFIG_ATH11K_DEBUGFS
+	struct dentry *debugfs_twt;
+#endif /* CONFIG_ATH11K_DEBUGFS */
 };
 
 struct ath11k_vif_iter {

drivers/net/wireless/ath/ath11k/debugfs.c

@@ -1224,3 +1224,225 @@ int ath11k_debugfs_register(struct ath11k *ar)
 void ath11k_debugfs_unregister(struct ath11k *ar)
 {
 }
+
+static ssize_t ath11k_write_twt_add_dialog(struct file *file,
+					   const char __user *ubuf,
+					   size_t count, loff_t *ppos)
+{
+	struct ath11k_vif *arvif = file->private_data;
+	struct wmi_twt_add_dialog_params params = { 0 };
+	u8 buf[128] = {0};
+	int ret;
+
+	if (arvif->ar->twt_enabled == 0) {
+		ath11k_err(arvif->ar->ab, "twt support is not enabled\n");
+		return -EOPNOTSUPP;
+	}
+
+	ret = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, ubuf, count);
+	if (ret < 0)
+		return ret;
+
+	buf[ret] = '\0';
+	ret = sscanf(buf,
+		     "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx %u %u %u %u %u %hhu %hhu %hhu %hhu %hhu",
+		     &params.peer_macaddr[0],
+		     &params.peer_macaddr[1],
+		     &params.peer_macaddr[2],
+		     &params.peer_macaddr[3],
+		     &params.peer_macaddr[4],
+		     &params.peer_macaddr[5],
+		     &params.dialog_id,
+		     &params.wake_intvl_us,
+		     &params.wake_intvl_mantis,
+		     &params.wake_dura_us,
+		     &params.sp_offset_us,
+		     &params.twt_cmd,
+		     &params.flag_bcast,
+		     &params.flag_trigger,
+		     &params.flag_flow_type,
+		     &params.flag_protection);
+	if (ret != 16)
+		return -EINVAL;
+
+	params.vdev_id = arvif->vdev_id;
+
+	ret = ath11k_wmi_send_twt_add_dialog_cmd(arvif->ar, &params);
+	if (ret)
+		return ret;
+
+	return count;
+}
+
+static ssize_t ath11k_write_twt_del_dialog(struct file *file,
+					   const char __user *ubuf,
+					   size_t count, loff_t *ppos)
+{
+	struct ath11k_vif *arvif = file->private_data;
+	struct wmi_twt_del_dialog_params params = { 0 };
+	u8 buf[64] = {0};
+	int ret;
+
+	if (arvif->ar->twt_enabled == 0) {
+		ath11k_err(arvif->ar->ab, "twt support is not enabled\n");
+		return -EOPNOTSUPP;
+	}
+
+	ret = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, ubuf, count);
+	if (ret < 0)
+		return ret;
+
+	buf[ret] = '\0';
+	ret = sscanf(buf, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx %u",
+		     &params.peer_macaddr[0],
+		     &params.peer_macaddr[1],
+		     &params.peer_macaddr[2],
+		     &params.peer_macaddr[3],
+		     &params.peer_macaddr[4],
+		     &params.peer_macaddr[5],
+		     &params.dialog_id);
+	if (ret != 7)
+		return -EINVAL;
+
+	params.vdev_id = arvif->vdev_id;
+
+	ret = ath11k_wmi_send_twt_del_dialog_cmd(arvif->ar, &params);
+	if (ret)
+		return ret;
+
+	return count;
+}
+
+static ssize_t ath11k_write_twt_pause_dialog(struct file *file,
+					     const char __user *ubuf,
+					     size_t count, loff_t *ppos)
+{
+	struct ath11k_vif *arvif = file->private_data;
+	struct wmi_twt_pause_dialog_params params = { 0 };
+	u8 buf[64] = {0};
+	int ret;
+
+	if (arvif->ar->twt_enabled == 0) {
+		ath11k_err(arvif->ar->ab, "twt support is not enabled\n");
+		return -EOPNOTSUPP;
+	}
+
+	ret = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, ubuf, count);
+	if (ret < 0)
+		return ret;
+
+	buf[ret] = '\0';
+	ret = sscanf(buf, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx %u",
+		     &params.peer_macaddr[0],
+		     &params.peer_macaddr[1],
+		     &params.peer_macaddr[2],
+		     &params.peer_macaddr[3],
+		     &params.peer_macaddr[4],
+		     &params.peer_macaddr[5],
+		     &params.dialog_id);
+	if (ret != 7)
+		return -EINVAL;
+
+	params.vdev_id = arvif->vdev_id;
+
+	ret = ath11k_wmi_send_twt_pause_dialog_cmd(arvif->ar, &params);
+	if (ret)
+		return ret;
+
+	return count;
+}
+
+static ssize_t ath11k_write_twt_resume_dialog(struct file *file,
+					      const char __user *ubuf,
+					      size_t count, loff_t *ppos)
+{
+	struct ath11k_vif *arvif = file->private_data;
+	struct wmi_twt_resume_dialog_params params = { 0 };
+	u8 buf[64] = {0};
+	int ret;
+
+	if (arvif->ar->twt_enabled == 0) {
+		ath11k_err(arvif->ar->ab, "twt support is not enabled\n");
+		return -EOPNOTSUPP;
+	}
+
+	ret = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, ubuf, count);
+	if (ret < 0)
+		return ret;
+
+	buf[ret] = '\0';
+	ret = sscanf(buf, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx %u %u %u",
+		     &params.peer_macaddr[0],
+		     &params.peer_macaddr[1],
+		     &params.peer_macaddr[2],
+		     &params.peer_macaddr[3],
+		     &params.peer_macaddr[4],
+		     &params.peer_macaddr[5],
+		     &params.dialog_id,
+		     &params.sp_offset_us,
+		     &params.next_twt_size);
+	if (ret != 9)
+		return -EINVAL;
+
+	params.vdev_id = arvif->vdev_id;
+
+	ret = ath11k_wmi_send_twt_resume_dialog_cmd(arvif->ar, &params);
+	if (ret)
+		return ret;
+
+	return count;
+}
+
+static const struct file_operations ath11k_fops_twt_add_dialog = {
+	.write = ath11k_write_twt_add_dialog,
+	.open = simple_open
+};
+
+static const struct file_operations ath11k_fops_twt_del_dialog = {
+	.write = ath11k_write_twt_del_dialog,
+	.open = simple_open
+};
+
+static const struct file_operations ath11k_fops_twt_pause_dialog = {
+	.write = ath11k_write_twt_pause_dialog,
+	.open = simple_open
+};
+
+static const struct file_operations ath11k_fops_twt_resume_dialog = {
+	.write = ath11k_write_twt_resume_dialog,
+	.open = simple_open
+};
+
+int ath11k_debugfs_add_interface(struct ath11k_vif *arvif)
+{
+	if (arvif->vif->type == NL80211_IFTYPE_AP && !arvif->debugfs_twt) {
+		arvif->debugfs_twt = debugfs_create_dir("twt",
+							arvif->vif->debugfs_dir);
+		if (!arvif->debugfs_twt || IS_ERR(arvif->debugfs_twt)) {
+			ath11k_warn(arvif->ar->ab,
+				    "failed to create directory %p\n",
+				    arvif->debugfs_twt);
+			arvif->debugfs_twt = NULL;
+			return -1;
+		}
+
+		debugfs_create_file("add_dialog", 0200, arvif->debugfs_twt,
+				    arvif, &ath11k_fops_twt_add_dialog);
+
+		debugfs_create_file("del_dialog", 0200, arvif->debugfs_twt,
+				    arvif, &ath11k_fops_twt_del_dialog);
+
+		debugfs_create_file("pause_dialog", 0200, arvif->debugfs_twt,
+				    arvif, &ath11k_fops_twt_pause_dialog);
+
+		debugfs_create_file("resume_dialog", 0200, arvif->debugfs_twt,
+				    arvif, &ath11k_fops_twt_resume_dialog);
+	}
+	return 0;
+}
+
+void ath11k_debugfs_remove_interface(struct ath11k_vif *arvif)
+{
+	debugfs_remove_recursive(arvif->debugfs_twt);
+	arvif->debugfs_twt = NULL;
+}

drivers/net/wireless/ath/ath11k/debugfs.h

@@ -276,6 +276,9 @@ static inline int ath11k_debugfs_rx_filter(struct ath11k *ar)
 	return ar->debug.rx_filter;
 }
 
+int ath11k_debugfs_add_interface(struct ath11k_vif *arvif);
+void ath11k_debugfs_remove_interface(struct ath11k_vif *arvif);
+
 #else
 static inline int ath11k_debugfs_soc_create(struct ath11k_base *ab)
 {
@@ -349,6 +352,15 @@ static inline int ath11k_debugfs_get_fw_stats(struct ath11k *ar,
 	return 0;
 }
 
-#endif /* CONFIG_MAC80211_DEBUGFS*/
+static inline int ath11k_debugfs_add_interface(struct ath11k_vif *arvif)
+{
+	return 0;
+}
+
+static inline void ath11k_debugfs_remove_interface(struct ath11k_vif *arvif)
+{
+}
+
+#endif /* CONFIG_ATH11K_DEBUGFS*/
 
 #endif /* _ATH11K_DEBUGFS_H_ */

drivers/net/wireless/ath/ath11k/mac.c

@@ -6354,6 +6354,10 @@ static int ath11k_mac_op_add_interface(struct ieee80211_hw *hw,
 		}
 	}
 
+	ret = ath11k_debugfs_add_interface(arvif);
+	if (ret)
+		goto err_peer_del;
+
 	mutex_unlock(&ar->conf_mutex);
 
 	return 0;
@@ -6388,6 +6392,7 @@ static int ath11k_mac_op_add_interface(struct ieee80211_hw *hw,
 	spin_unlock_bh(&ar->data_lock);
 
 err:
+	ath11k_debugfs_remove_interface(arvif);
 	mutex_unlock(&ar->conf_mutex);
 
 	return ret;
@@ -6486,6 +6491,8 @@ static void ath11k_mac_op_remove_interface(struct ieee80211_hw *hw,
 	/* Recalc txpower for remaining vdev */
 	ath11k_mac_txpower_recalc(ar);
 
+	ath11k_debugfs_remove_interface(arvif);
+
 	/* TODO: recal traffic pause state based on the available vdevs */
 
 	mutex_unlock(&ar->conf_mutex);