1 // SPDX-License-Identifier: ISC 2 /* Copyright (C) 2021 MediaTek Inc. */ 3 4 #include "mt7921.h" 5 #include "../dma.h" 6 #include "mac.h" 7 8 int mt7921e_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr, 9 enum mt76_txq_id qid, struct mt76_wcid *wcid, 10 struct ieee80211_sta *sta, 11 struct mt76_tx_info *tx_info) 12 { 13 struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76); 14 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_info->skb); 15 struct ieee80211_key_conf *key = info->control.hw_key; 16 struct mt76_connac_hw_txp *txp; 17 struct mt76_txwi_cache *t; 18 int id, pid; 19 u8 *txwi = (u8 *)txwi_ptr; 20 21 if (unlikely(tx_info->skb->len <= ETH_HLEN)) 22 return -EINVAL; 23 24 if (!wcid) 25 wcid = &dev->mt76.global_wcid; 26 27 t = (struct mt76_txwi_cache *)(txwi + mdev->drv->txwi_size); 28 t->skb = tx_info->skb; 29 30 id = mt76_token_consume(mdev, &t); 31 if (id < 0) 32 return id; 33 34 if (sta) { 35 struct mt7921_sta *msta = (struct mt7921_sta *)sta->drv_priv; 36 37 if (time_after(jiffies, msta->last_txs + HZ / 4)) { 38 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 39 msta->last_txs = jiffies; 40 } 41 } 42 43 pid = mt76_tx_status_skb_add(mdev, wcid, tx_info->skb); 44 mt76_connac2_mac_write_txwi(mdev, txwi_ptr, tx_info->skb, wcid, key, 45 pid, qid, 0); 46 47 txp = (struct mt76_connac_hw_txp *)(txwi + MT_TXD_SIZE); 48 memset(txp, 0, sizeof(struct mt76_connac_hw_txp)); 49 mt76_connac_write_hw_txp(mdev, tx_info, txp, id); 50 51 tx_info->skb = DMA_DUMMY_DATA; 52 53 return 0; 54 } 55 56 static void 57 mt7921_txwi_free(struct mt7921_dev *dev, struct mt76_txwi_cache *t, 58 struct ieee80211_sta *sta, bool clear_status, 59 struct list_head *free_list) 60 { 61 struct mt76_dev *mdev = &dev->mt76; 62 __le32 *txwi; 63 u16 wcid_idx; 64 65 mt76_connac_txp_skb_unmap(mdev, t); 66 if (!t->skb) 67 goto out; 68 69 txwi = (__le32 *)mt76_get_txwi_ptr(mdev, t); 70 if (sta) { 71 struct mt76_wcid *wcid = (struct mt76_wcid *)sta->drv_priv; 72 73 if (likely(t->skb->protocol != cpu_to_be16(ETH_P_PAE))) 74 mt7921_tx_check_aggr(sta, txwi); 75 76 wcid_idx = wcid->idx; 77 } else { 78 wcid_idx = le32_get_bits(txwi[1], MT_TXD1_WLAN_IDX); 79 } 80 81 __mt76_tx_complete_skb(mdev, wcid_idx, t->skb, free_list); 82 83 out: 84 t->skb = NULL; 85 mt76_put_txwi(mdev, t); 86 } 87 88 static void 89 mt7921e_mac_tx_free(struct mt7921_dev *dev, void *data, int len) 90 { 91 struct mt76_connac_tx_free *free = data; 92 __le32 *tx_info = (__le32 *)(data + sizeof(*free)); 93 struct mt76_dev *mdev = &dev->mt76; 94 struct mt76_txwi_cache *txwi; 95 struct ieee80211_sta *sta = NULL; 96 struct sk_buff *skb, *tmp; 97 void *end = data + len; 98 LIST_HEAD(free_list); 99 bool wake = false; 100 u8 i, count; 101 102 /* clean DMA queues and unmap buffers first */ 103 mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_PSD], false); 104 mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_BE], false); 105 106 count = le16_get_bits(free->ctrl, MT_TX_FREE_MSDU_CNT); 107 if (WARN_ON_ONCE((void *)&tx_info[count] > end)) 108 return; 109 110 for (i = 0; i < count; i++) { 111 u32 msdu, info = le32_to_cpu(tx_info[i]); 112 u8 stat; 113 114 /* 1'b1: new wcid pair. 115 * 1'b0: msdu_id with the same 'wcid pair' as above. 116 */ 117 if (info & MT_TX_FREE_PAIR) { 118 struct mt7921_sta *msta; 119 struct mt76_wcid *wcid; 120 u16 idx; 121 122 count++; 123 idx = FIELD_GET(MT_TX_FREE_WLAN_ID, info); 124 wcid = rcu_dereference(dev->mt76.wcid[idx]); 125 sta = wcid_to_sta(wcid); 126 if (!sta) 127 continue; 128 129 msta = container_of(wcid, struct mt7921_sta, wcid); 130 spin_lock_bh(&dev->sta_poll_lock); 131 if (list_empty(&msta->poll_list)) 132 list_add_tail(&msta->poll_list, &dev->sta_poll_list); 133 spin_unlock_bh(&dev->sta_poll_lock); 134 continue; 135 } 136 137 msdu = FIELD_GET(MT_TX_FREE_MSDU_ID, info); 138 stat = FIELD_GET(MT_TX_FREE_STATUS, info); 139 140 txwi = mt76_token_release(mdev, msdu, &wake); 141 if (!txwi) 142 continue; 143 144 mt7921_txwi_free(dev, txwi, sta, stat, &free_list); 145 } 146 147 if (wake) 148 mt76_set_tx_blocked(&dev->mt76, false); 149 150 list_for_each_entry_safe(skb, tmp, &free_list, list) { 151 skb_list_del_init(skb); 152 napi_consume_skb(skb, 1); 153 } 154 155 rcu_read_lock(); 156 mt7921_mac_sta_poll(dev); 157 rcu_read_unlock(); 158 159 mt76_worker_schedule(&dev->mt76.tx_worker); 160 } 161 162 bool mt7921e_rx_check(struct mt76_dev *mdev, void *data, int len) 163 { 164 struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76); 165 __le32 *rxd = (__le32 *)data; 166 __le32 *end = (__le32 *)&rxd[len / 4]; 167 enum rx_pkt_type type; 168 169 type = le32_get_bits(rxd[0], MT_RXD0_PKT_TYPE); 170 171 switch (type) { 172 case PKT_TYPE_TXRX_NOTIFY: 173 mt7921e_mac_tx_free(dev, data, len); 174 return false; 175 case PKT_TYPE_TXS: 176 for (rxd += 2; rxd + 8 <= end; rxd += 8) 177 mt7921_mac_add_txs(dev, rxd); 178 return false; 179 default: 180 return true; 181 } 182 } 183 184 void mt7921e_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q, 185 struct sk_buff *skb) 186 { 187 struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76); 188 __le32 *rxd = (__le32 *)skb->data; 189 enum rx_pkt_type type; 190 191 type = le32_get_bits(rxd[0], MT_RXD0_PKT_TYPE); 192 193 switch (type) { 194 case PKT_TYPE_TXRX_NOTIFY: 195 mt7921e_mac_tx_free(dev, skb->data, skb->len); 196 napi_consume_skb(skb, 1); 197 break; 198 default: 199 mt7921_queue_rx_skb(mdev, q, skb); 200 break; 201 } 202 } 203 204 void mt7921_tx_token_put(struct mt7921_dev *dev) 205 { 206 struct mt76_txwi_cache *txwi; 207 int id; 208 209 spin_lock_bh(&dev->mt76.token_lock); 210 idr_for_each_entry(&dev->mt76.token, txwi, id) { 211 mt7921_txwi_free(dev, txwi, NULL, false, NULL); 212 dev->mt76.token_count--; 213 } 214 spin_unlock_bh(&dev->mt76.token_lock); 215 idr_destroy(&dev->mt76.token); 216 } 217 218 int mt7921e_mac_reset(struct mt7921_dev *dev) 219 { 220 int i, err; 221 222 mt7921e_mcu_drv_pmctrl(dev); 223 224 mt76_connac_free_pending_tx_skbs(&dev->pm, NULL); 225 226 mt76_wr(dev, MT_WFDMA0_HOST_INT_ENA, 0); 227 mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0x0); 228 229 set_bit(MT76_RESET, &dev->mphy.state); 230 set_bit(MT76_MCU_RESET, &dev->mphy.state); 231 wake_up(&dev->mt76.mcu.wait); 232 skb_queue_purge(&dev->mt76.mcu.res_q); 233 234 mt76_txq_schedule_all(&dev->mphy); 235 236 mt76_worker_disable(&dev->mt76.tx_worker); 237 napi_disable(&dev->mt76.napi[MT_RXQ_MAIN]); 238 napi_disable(&dev->mt76.napi[MT_RXQ_MCU]); 239 napi_disable(&dev->mt76.napi[MT_RXQ_MCU_WA]); 240 napi_disable(&dev->mt76.tx_napi); 241 242 mt7921_tx_token_put(dev); 243 idr_init(&dev->mt76.token); 244 245 mt7921_wpdma_reset(dev, true); 246 247 local_bh_disable(); 248 mt76_for_each_q_rx(&dev->mt76, i) { 249 napi_enable(&dev->mt76.napi[i]); 250 napi_schedule(&dev->mt76.napi[i]); 251 } 252 local_bh_enable(); 253 254 dev->fw_assert = false; 255 clear_bit(MT76_MCU_RESET, &dev->mphy.state); 256 257 mt76_wr(dev, MT_WFDMA0_HOST_INT_ENA, 258 MT_INT_RX_DONE_ALL | MT_INT_TX_DONE_ALL | 259 MT_INT_MCU_CMD); 260 mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0xff); 261 262 err = mt7921e_driver_own(dev); 263 if (err) 264 goto out; 265 266 err = mt7921_run_firmware(dev); 267 if (err) 268 goto out; 269 270 err = mt7921_mcu_set_eeprom(dev); 271 if (err) 272 goto out; 273 274 err = mt7921_mac_init(dev); 275 if (err) 276 goto out; 277 278 err = __mt7921_start(&dev->phy); 279 out: 280 clear_bit(MT76_RESET, &dev->mphy.state); 281 282 local_bh_disable(); 283 napi_enable(&dev->mt76.tx_napi); 284 napi_schedule(&dev->mt76.tx_napi); 285 local_bh_enable(); 286 287 mt76_worker_enable(&dev->mt76.tx_worker); 288 289 return err; 290 } 291