[PATCH v3 08/18] rtw89: implement mac80211 ops

[Ping-Ke Shih <pkshih@realtek.com>]

Implement ops to interactive with mac80211. The ops contain start/stop,
TX, add/remove vif, config, sta state, key, ampdu action,
sw_scan_start/complete, and so on. To avoid racing between ieee80211
delayed work and ioctl, all of them are protected by rtwdev->mutex.
To yield better TX performance, wake TX queue is implemented.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw89/mac80211.c | 521 ++++++++++++++++++
 1 file changed, 521 insertions(+)
 create mode 100644 drivers/net/wireless/realtek/rtw89/mac80211.c

diff --git a/drivers/net/wireless/realtek/rtw89/mac80211.c b/drivers/net/wireless/realtek/rtw89/mac80211.c
new file mode 100644
index 000000000000..c3e178350473
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw89/mac80211.c
@@ -0,0 +1,521 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/* Copyright(c) 2019-2020  Realtek Corporation
+ */
+
+#include "cam.h"
+#include "coex.h"
+#include "debug.h"
+#include "fw.h"
+#include "mac.h"
+#include "phy.h"
+#include "reg.h"
+
+static void rtw89_ops_tx(struct ieee80211_hw *hw,
+			 struct ieee80211_tx_control *control,
+			 struct sk_buff *skb)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct ieee80211_vif *vif = info->control.vif;
+	struct ieee80211_sta *sta = control->sta;
+	int ret, qsel;
+
+	ret = rtw89_core_tx_write(rtwdev, vif, sta, skb, &qsel);
+	if (ret) {
+		rtw89_err(rtwdev, "failed to transmit skb: %d\n", ret);
+		ieee80211_free_txskb(hw, skb);
+	}
+	rtw89_core_tx_kick_off(rtwdev, qsel);
+}
+
+static void rtw89_ops_wake_tx_queue(struct ieee80211_hw *hw,
+				    struct ieee80211_txq *txq)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+
+	ieee80211_schedule_txq(hw, txq);
+	tasklet_schedule(&rtwdev->txq_tasklet);
+}
+
+static int __rtw89_ops_start(struct ieee80211_hw *hw)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+	int ret;
+
+	rtwdev->mac.qta_mode = RTW89_QTA_SCC;
+	ret = rtw89_mac_init(rtwdev);
+	if (ret) {
+		rtw89_err(rtwdev, "mac init fail, ret:%d\n", ret);
+		return ret;
+	}
+
+	/* btc power on notify */
+
+	/* efuse process */
+
+	/* pre-config BB/RF, BB reset/RFC reset */
+	rtw89_mac_disable_bb_rf(rtwdev);
+	rtw89_mac_enable_bb_rf(rtwdev);
+	rtw89_phy_init_bb_reg(rtwdev);
+	rtw89_phy_init_rf_reg(rtwdev);
+
+	rtw89_btc_ntfy_init(rtwdev, BTC_MODE_WL);
+
+	rtw89_phy_dm_init(rtwdev);
+
+	rtw89_mac_cfg_ppdu_status(rtwdev, RTW89_MAC_0, true);
+
+	ret = rtw89_hci_start(rtwdev);
+	if (ret) {
+		rtw89_err(rtwdev, "failed to start hci\n");
+		return ret;
+	}
+
+	ieee80211_queue_delayed_work(rtwdev->hw, &rtwdev->track_work,
+				     RTW89_TRACK_WORK_PERIOD);
+
+	set_bit(RTW89_FLAG_RUNNING, rtwdev->flags);
+
+	return 0;
+}
+
+static int rtw89_ops_start(struct ieee80211_hw *hw)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+	int ret;
+
+	mutex_lock(&rtwdev->mutex);
+	ret = __rtw89_ops_start(hw);
+	mutex_unlock(&rtwdev->mutex);
+
+	return ret;
+}
+
+static void __rtw89_ops_stop(struct ieee80211_hw *hw)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+
+	clear_bit(RTW89_FLAG_RUNNING, rtwdev->flags);
+
+	mutex_unlock(&rtwdev->mutex);
+
+	cancel_work_sync(&rtwdev->c2h_work);
+	cancel_delayed_work_sync(&rtwdev->track_work);
+
+	mutex_lock(&rtwdev->mutex);
+
+	rtw89_mac_flush_txq(rtwdev, BIT(rtwdev->hw->queues) - 1, true);
+	rtw89_hci_deinit(rtwdev);
+	rtw89_mac_pwr_off(rtwdev);
+	rtw89_hci_stop(rtwdev);
+	rtw89_hci_reset(rtwdev);
+}
+
+static void rtw89_ops_stop(struct ieee80211_hw *hw)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+
+	mutex_lock(&rtwdev->mutex);
+	__rtw89_ops_stop(hw);
+	mutex_unlock(&rtwdev->mutex);
+}
+
+static int rtw89_ops_config(struct ieee80211_hw *hw, u32 changed)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+
+	mutex_lock(&rtwdev->mutex);
+
+	if (changed & IEEE80211_CONF_CHANGE_CHANNEL)
+		rtw89_set_channel(rtwdev);
+
+	mutex_unlock(&rtwdev->mutex);
+
+	return 0;
+}
+
+static int rtw89_ops_add_interface(struct ieee80211_hw *hw,
+				   struct ieee80211_vif *vif)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+	struct rtw89_vif *rtwvif = (struct rtw89_vif *)vif->drv_priv;
+	int ret = 0;
+
+	mutex_lock(&rtwdev->mutex);
+
+	rtw89_vif_type_mapping(vif, false);
+	rtwvif->port = rtw89_core_acquire_bit_map(rtwdev->hw_port,
+						  RTW89_MAX_HW_PORT_NUM);
+	if (rtwvif->port == RTW89_MAX_HW_PORT_NUM) {
+		ret = -ENOSPC;
+		goto out;
+	}
+
+	rtwvif->bcn_hit_cond = 0;
+	rtwvif->mac_idx = RTW89_MAC_0;
+	rtwvif->hit_rule = 0;
+	ether_addr_copy(rtwvif->mac_addr, vif->addr);
+
+	ret = rtw89_mac_add_vif(rtwdev, rtwvif);
+	if (ret) {
+		rtw89_core_release_bit_map(rtwdev->hw_port, rtwvif->port);
+		goto out;
+	}
+
+	rtw89_core_txq_init(rtwdev, vif->txq);
+
+out:
+	mutex_unlock(&rtwdev->mutex);
+
+	return ret;
+}
+
+static void rtw89_ops_remove_interface(struct ieee80211_hw *hw,
+				       struct ieee80211_vif *vif)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+	struct rtw89_vif *rtwvif = (struct rtw89_vif *)vif->drv_priv;
+
+	mutex_lock(&rtwdev->mutex);
+
+	rtw89_mac_remove_vif(rtwdev, rtwvif);
+	rtw89_core_release_bit_map(rtwdev->hw_port, rtwvif->port);
+
+	mutex_unlock(&rtwdev->mutex);
+}
+
+static void rtw89_ops_configure_filter(struct ieee80211_hw *hw,
+				       unsigned int changed_flags,
+				       unsigned int *new_flags,
+				       u64 multicast)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+
+	mutex_lock(&rtwdev->mutex);
+
+	*new_flags &= FIF_ALLMULTI | FIF_OTHER_BSS | FIF_FCSFAIL |
+		      FIF_BCN_PRBRESP_PROMISC;
+
+	if (changed_flags & FIF_ALLMULTI) {
+		if (*new_flags & FIF_ALLMULTI)
+			rtwdev->hal.rx_fltr &= ~B_AX_A_MC;
+		else
+			rtwdev->hal.rx_fltr |= B_AX_A_MC;
+	}
+	if (changed_flags & FIF_FCSFAIL) {
+		if (*new_flags & FIF_FCSFAIL)
+			rtwdev->hal.rx_fltr |= B_AX_A_CRC32_ERR;
+		else
+			rtwdev->hal.rx_fltr &= ~B_AX_A_CRC32_ERR;
+	}
+	if (changed_flags & FIF_OTHER_BSS) {
+		if (*new_flags & FIF_OTHER_BSS)
+			rtwdev->hal.rx_fltr &= ~B_AX_A_A1_MATCH;
+		else
+			rtwdev->hal.rx_fltr |= B_AX_A_A1_MATCH;
+	}
+	if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
+		if (*new_flags & FIF_BCN_PRBRESP_PROMISC) {
+			rtwdev->hal.rx_fltr &= ~B_AX_A_BCN_CHK_EN;
+			rtwdev->hal.rx_fltr &= ~B_AX_A_BC;
+			rtwdev->hal.rx_fltr &= ~B_AX_A_A1_MATCH;
+		} else {
+			rtwdev->hal.rx_fltr |= B_AX_A_BCN_CHK_EN;
+			rtwdev->hal.rx_fltr |= B_AX_A_BC;
+			rtwdev->hal.rx_fltr |= B_AX_A_A1_MATCH;
+		}
+	}
+
+	rtw89_write32(rtwdev,
+		      rtw89_mac_reg_by_idx(R_AX_RX_FLTR_OPT, RTW89_MAC_0),
+		      rtwdev->hal.rx_fltr);
+	if (!rtwdev->dbcc_en)
+		goto out;
+	rtw89_write32(rtwdev,
+		      rtw89_mac_reg_by_idx(R_AX_RX_FLTR_OPT, RTW89_MAC_1),
+		      rtwdev->hal.rx_fltr);
+
+out:
+	mutex_unlock(&rtwdev->mutex);
+}
+
+static const u32 ac_to_edca_param[IEEE80211_NUM_ACS] = {
+	[IEEE80211_AC_VO] = R_AX_EDCA_VO_PARAM_0,
+	[IEEE80211_AC_VI] = R_AX_EDCA_VI_PARAM_0,
+	[IEEE80211_AC_BE] = R_AX_EDCA_BE_PARAM_0,
+	[IEEE80211_AC_BK] = R_AX_EDCA_BK_PARAM_0,
+};
+
+static u8 rtw89_aifsn_to_aifs(struct rtw89_dev *rtwdev,
+			      struct rtw89_vif *rtwvif, u8 aifsn)
+{
+	struct ieee80211_vif *vif = rtwvif_to_vif(rtwvif);
+	u8 slot_time;
+	u8 sifs;
+
+	slot_time = vif->bss_conf.use_short_slot ? 9 : 20;
+	sifs = rtwdev->hal.current_band_type == RTW89_BAND_5G ? 16 : 10;
+
+	return aifsn * slot_time + sifs;
+}
+
+static void __rtw89_conf_tx(struct rtw89_dev *rtwdev,
+			    struct rtw89_vif *rtwvif, u16 ac)
+{
+	struct ieee80211_tx_queue_params *params = &rtwvif->tx_params[ac];
+	u32 edca_param = rtw89_mac_reg_by_idx(ac_to_edca_param[ac], RTW89_MAC_0);
+	u32 val;
+	u8 ecw_max, ecw_min;
+	u8 aifs;
+
+	/* 2^ecw - 1 = cw; ecw = log2(cw + 1) */
+	ecw_max = ilog2(params->cw_max + 1);
+	ecw_min = ilog2(params->cw_min + 1);
+	aifs = rtw89_aifsn_to_aifs(rtwdev, rtwvif, params->aifs);
+	val = FIELD_PREP(B_AX_BE_0_TXOPLMT_MSK, params->txop) |
+	      FIELD_PREP(B_AX_BE_0_CWMAX_MSK, ecw_max) |
+	      FIELD_PREP(B_AX_BE_0_CWMIN_MSK, ecw_min) |
+	      FIELD_PREP(B_AX_BE_0_AIFS_MSK, aifs);
+	rtw89_write32(rtwdev, edca_param, val);
+}
+
+static void rtw89_conf_tx(struct rtw89_dev *rtwdev,
+			  struct rtw89_vif *rtwvif)
+{
+	u16 ac;
+
+	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
+		__rtw89_conf_tx(rtwdev, rtwvif, ac);
+}
+
+static void rtw89_ops_bss_info_changed(struct ieee80211_hw *hw,
+				       struct ieee80211_vif *vif,
+				       struct ieee80211_bss_conf *conf,
+				       u32 changed)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+	struct rtw89_vif *rtwvif = (struct rtw89_vif *)vif->drv_priv;
+
+	mutex_lock(&rtwdev->mutex);
+
+	if (changed & BSS_CHANGED_ASSOC) {
+		rtw89_phy_set_bss_color(rtwdev, vif);
+		rtw89_mac_port_update(rtwdev, rtwvif);
+	}
+
+	if (changed & BSS_CHANGED_BSSID) {
+		ether_addr_copy(rtwvif->bssid, conf->bssid);
+		rtw89_cam_bssid_changed(rtwdev, rtwvif);
+		rtw89_fw_h2c_cam(rtwdev, rtwvif);
+	}
+
+	if (changed & BSS_CHANGED_ERP_SLOT)
+		rtw89_conf_tx(rtwdev, rtwvif);
+
+	if (changed & BSS_CHANGED_HE_BSS_COLOR)
+		rtw89_phy_set_bss_color(rtwdev, vif);
+
+	mutex_unlock(&rtwdev->mutex);
+}
+
+static int rtw89_ops_conf_tx(struct ieee80211_hw *hw,
+			     struct ieee80211_vif *vif, u16 ac,
+			     const struct ieee80211_tx_queue_params *params)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+	struct rtw89_vif *rtwvif = (struct rtw89_vif *)vif->drv_priv;
+
+	mutex_lock(&rtwdev->mutex);
+
+	rtwvif->tx_params[ac] = *params;
+	__rtw89_conf_tx(rtwdev, rtwvif, ac);
+
+	mutex_unlock(&rtwdev->mutex);
+
+	return 0;
+}
+
+static int __rtw89_ops_sta_state(struct ieee80211_hw *hw,
+				 struct ieee80211_vif *vif,
+				 struct ieee80211_sta *sta,
+				 enum ieee80211_sta_state old_state,
+				 enum ieee80211_sta_state new_state)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+
+	if (old_state == IEEE80211_STA_NOTEXIST &&
+	    new_state == IEEE80211_STA_NONE)
+		return rtw89_core_sta_add(rtwdev, vif, sta);
+
+	if (old_state == IEEE80211_STA_AUTH &&
+	    new_state == IEEE80211_STA_ASSOC)
+		return rtw89_core_sta_assoc(rtwdev, vif, sta);
+
+	if (old_state == IEEE80211_STA_ASSOC &&
+	    new_state == IEEE80211_STA_AUTH)
+		return rtw89_core_sta_disassoc(rtwdev, vif, sta);
+
+	if (old_state == IEEE80211_STA_AUTH &&
+	    new_state == IEEE80211_STA_NONE)
+		return rtw89_core_sta_disconnect(rtwdev, vif, sta);
+
+	if (old_state == IEEE80211_STA_NONE &&
+	    new_state == IEEE80211_STA_NOTEXIST)
+		return rtw89_core_sta_remove(rtwdev, vif, sta);
+
+	return 0;
+}
+
+static int rtw89_ops_sta_state(struct ieee80211_hw *hw,
+			       struct ieee80211_vif *vif,
+			       struct ieee80211_sta *sta,
+			       enum ieee80211_sta_state old_state,
+			       enum ieee80211_sta_state new_state)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+	int ret;
+
+	mutex_lock(&rtwdev->mutex);
+	ret = __rtw89_ops_sta_state(hw, vif, sta, old_state, new_state);
+	mutex_unlock(&rtwdev->mutex);
+
+	return ret;
+}
+
+static int rtw89_ops_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
+			     struct ieee80211_vif *vif,
+			     struct ieee80211_sta *sta,
+			     struct ieee80211_key_conf *key)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+	int ret = 0;
+
+	mutex_lock(&rtwdev->mutex);
+
+	switch (cmd) {
+	case SET_KEY:
+		ret = rtw89_cam_sec_key_add(rtwdev, vif, sta, key);
+		if (ret) {
+			rtw89_err(rtwdev, "failed to add key to sec cam\n");
+			goto out;
+		}
+		break;
+	case DISABLE_KEY:
+		rtw89_mac_flush_txq(rtwdev, BIT(rtwdev->hw->queues) - 1, false);
+		ret = rtw89_cam_sec_key_del(rtwdev, vif, sta, key);
+		if (ret) {
+			rtw89_err(rtwdev, "failed to remove key from sec cam\n");
+			goto out;
+		}
+		break;
+	}
+
+out:
+	mutex_unlock(&rtwdev->mutex);
+
+	return ret;
+}
+
+static int rtw89_ops_ampdu_action(struct ieee80211_hw *hw,
+				  struct ieee80211_vif *vif,
+				  struct ieee80211_ampdu_params *params)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+	struct ieee80211_sta *sta = params->sta;
+	struct rtw89_sta *rtwsta = (struct rtw89_sta *)sta->drv_priv;
+	u16 tid = params->tid;
+	struct ieee80211_txq *txq = sta->txq[tid];
+	struct rtw89_txq *rtwtxq = (struct rtw89_txq *)txq->drv_priv;
+
+	switch (params->action) {
+	case IEEE80211_AMPDU_TX_START:
+		return IEEE80211_AMPDU_TX_START_IMMEDIATE;
+	case IEEE80211_AMPDU_TX_STOP_CONT:
+	case IEEE80211_AMPDU_TX_STOP_FLUSH:
+	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
+		clear_bit(RTW89_TXQ_F_AMPDU, &rtwtxq->flags);
+		rtw89_fw_h2c_ba_cam(rtwdev, false, rtwsta->mac_id, params);
+		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
+		break;
+	case IEEE80211_AMPDU_TX_OPERATIONAL:
+		set_bit(RTW89_TXQ_F_AMPDU, &rtwtxq->flags);
+		rtwsta->ampdu_params[tid].agg_num = params->buf_size;
+		rtwsta->ampdu_params[tid].amsdu = params->amsdu;
+		rtw89_fw_h2c_ba_cam(rtwdev, true, rtwsta->mac_id, params);
+		break;
+	case IEEE80211_AMPDU_RX_START:
+	case IEEE80211_AMPDU_RX_STOP:
+		break;
+	default:
+		WARN_ON(1);
+		return -ENOTSUPP;
+	}
+
+	return 0;
+}
+
+static int rtw89_ops_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
+{
+	return 0;
+}
+
+static void rtw89_ops_sta_statistics(struct ieee80211_hw *hw,
+				     struct ieee80211_vif *vif,
+				     struct ieee80211_sta *sta,
+				     struct station_info *sinfo)
+{
+	struct rtw89_sta *rtwsta = (struct rtw89_sta *)sta->drv_priv;
+
+	sinfo->txrate = rtwsta->ra_report.txrate;
+	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE);
+}
+
+static void rtw89_ops_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+			    u32 queues, bool drop)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+
+	mutex_lock(&rtwdev->mutex);
+	rtw89_mac_flush_txq(rtwdev, queues, drop);
+	mutex_unlock(&rtwdev->mutex);
+}
+
+static void rtw89_ops_sw_scan_start(struct ieee80211_hw *hw,
+				    struct ieee80211_vif *vif,
+				    const u8 *mac_addr)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+	struct rtw89_hal *hal = &rtwdev->hal;
+
+	rtw89_btc_ntfy_scan_start(rtwdev, RTW89_PHY_0, hal->current_band_type);
+}
+
+static void rtw89_ops_sw_scan_complete(struct ieee80211_hw *hw,
+				       struct ieee80211_vif *vif)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+
+	rtw89_btc_ntfy_scan_finish(rtwdev, RTW89_PHY_0);
+}
+
+const struct ieee80211_ops rtw89_ops = {
+	.tx			= rtw89_ops_tx,
+	.wake_tx_queue		= rtw89_ops_wake_tx_queue,
+	.start			= rtw89_ops_start,
+	.stop			= rtw89_ops_stop,
+	.config			= rtw89_ops_config,
+	.add_interface		= rtw89_ops_add_interface,
+	.remove_interface	= rtw89_ops_remove_interface,
+	.configure_filter	= rtw89_ops_configure_filter,
+	.bss_info_changed	= rtw89_ops_bss_info_changed,
+	.conf_tx		= rtw89_ops_conf_tx,
+	.sta_state		= rtw89_ops_sta_state,
+	.set_key		= rtw89_ops_set_key,
+	.ampdu_action		= rtw89_ops_ampdu_action,
+	.set_rts_threshold	= rtw89_ops_set_rts_threshold,
+	.sta_statistics		= rtw89_ops_sta_statistics,
+	.flush			= rtw89_ops_flush,
+	.sw_scan_start		= rtw89_ops_sw_scan_start,
+	.sw_scan_complete	= rtw89_ops_sw_scan_complete,
+};
+EXPORT_SYMBOL(rtw89_ops);
-- 
2.21.0