aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/mediatek/mt76/mt7921/pci_mac.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/mt7921/pci_mac.c')
-rw-r--r--drivers/net/wireless/mediatek/mt76/mt7921/pci_mac.c348
1 files changed, 348 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/pci_mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/pci_mac.c
new file mode 100644
index 000000000000..f9547d27356e
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/pci_mac.c
@@ -0,0 +1,348 @@
+// SPDX-License-Identifier: ISC
+/* Copyright (C) 2021 MediaTek Inc. */
+
+#include "mt7921.h"
+#include "../dma.h"
+#include "mac.h"
+
+static void
+mt7921_write_hw_txp(struct mt7921_dev *dev, struct mt76_tx_info *tx_info,
+ void *txp_ptr, u32 id)
+{
+ struct mt7921_hw_txp *txp = txp_ptr;
+ struct mt7921_txp_ptr *ptr = &txp->ptr[0];
+ int i, nbuf = tx_info->nbuf - 1;
+
+ tx_info->buf[0].len = MT_TXD_SIZE + sizeof(*txp);
+ tx_info->nbuf = 1;
+
+ txp->msdu_id[0] = cpu_to_le16(id | MT_MSDU_ID_VALID);
+
+ for (i = 0; i < nbuf; i++) {
+ u16 len = tx_info->buf[i + 1].len & MT_TXD_LEN_MASK;
+ u32 addr = tx_info->buf[i + 1].addr;
+
+ if (i == nbuf - 1)
+ len |= MT_TXD_LEN_LAST;
+
+ if (i & 1) {
+ ptr->buf1 = cpu_to_le32(addr);
+ ptr->len1 = cpu_to_le16(len);
+ ptr++;
+ } else {
+ ptr->buf0 = cpu_to_le32(addr);
+ ptr->len0 = cpu_to_le16(len);
+ }
+ }
+}
+
+int mt7921e_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
+ enum mt76_txq_id qid, struct mt76_wcid *wcid,
+ struct ieee80211_sta *sta,
+ struct mt76_tx_info *tx_info)
+{
+ struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_info->skb);
+ struct ieee80211_key_conf *key = info->control.hw_key;
+ struct mt76_txwi_cache *t;
+ struct mt7921_txp_common *txp;
+ int id, pid;
+ u8 *txwi = (u8 *)txwi_ptr;
+
+ if (unlikely(tx_info->skb->len <= ETH_HLEN))
+ return -EINVAL;
+
+ if (!wcid)
+ wcid = &dev->mt76.global_wcid;
+
+ t = (struct mt76_txwi_cache *)(txwi + mdev->drv->txwi_size);
+ t->skb = tx_info->skb;
+
+ id = mt76_token_consume(mdev, &t);
+ if (id < 0)
+ return id;
+
+ if (sta) {
+ struct mt7921_sta *msta = (struct mt7921_sta *)sta->drv_priv;
+
+ if (time_after(jiffies, msta->last_txs + HZ / 4)) {
+ info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
+ msta->last_txs = jiffies;
+ }
+ }
+
+ pid = mt76_tx_status_skb_add(mdev, wcid, tx_info->skb);
+ mt7921_mac_write_txwi(dev, txwi_ptr, tx_info->skb, wcid, key,
+ pid, false);
+
+ txp = (struct mt7921_txp_common *)(txwi + MT_TXD_SIZE);
+ memset(txp, 0, sizeof(struct mt7921_txp_common));
+ mt7921_write_hw_txp(dev, tx_info, txp, id);
+
+ tx_info->skb = DMA_DUMMY_DATA;
+
+ return 0;
+}
+
+static void
+mt7921_txp_skb_unmap(struct mt76_dev *dev, struct mt76_txwi_cache *t)
+{
+ struct mt7921_txp_common *txp;
+ int i;
+
+ txp = mt7921_txwi_to_txp(dev, t);
+
+ for (i = 0; i < ARRAY_SIZE(txp->hw.ptr); i++) {
+ struct mt7921_txp_ptr *ptr = &txp->hw.ptr[i];
+ bool last;
+ u16 len;
+
+ len = le16_to_cpu(ptr->len0);
+ last = len & MT_TXD_LEN_LAST;
+ len &= MT_TXD_LEN_MASK;
+ dma_unmap_single(dev->dev, le32_to_cpu(ptr->buf0), len,
+ DMA_TO_DEVICE);
+ if (last)
+ break;
+
+ len = le16_to_cpu(ptr->len1);
+ last = len & MT_TXD_LEN_LAST;
+ len &= MT_TXD_LEN_MASK;
+ dma_unmap_single(dev->dev, le32_to_cpu(ptr->buf1), len,
+ DMA_TO_DEVICE);
+ if (last)
+ break;
+ }
+}
+
+static void
+mt7921_txwi_free(struct mt7921_dev *dev, struct mt76_txwi_cache *t,
+ struct ieee80211_sta *sta, bool clear_status,
+ struct list_head *free_list)
+{
+ struct mt76_dev *mdev = &dev->mt76;
+ __le32 *txwi;
+ u16 wcid_idx;
+
+ mt7921_txp_skb_unmap(mdev, t);
+ if (!t->skb)
+ goto out;
+
+ txwi = (__le32 *)mt76_get_txwi_ptr(mdev, t);
+ if (sta) {
+ struct mt76_wcid *wcid = (struct mt76_wcid *)sta->drv_priv;
+
+ if (likely(t->skb->protocol != cpu_to_be16(ETH_P_PAE)))
+ mt7921_tx_check_aggr(sta, txwi);
+
+ wcid_idx = wcid->idx;
+ } else {
+ wcid_idx = FIELD_GET(MT_TXD1_WLAN_IDX, le32_to_cpu(txwi[1]));
+ }
+
+ __mt76_tx_complete_skb(mdev, wcid_idx, t->skb, free_list);
+
+out:
+ t->skb = NULL;
+ mt76_put_txwi(mdev, t);
+}
+
+static void
+mt7921_mac_tx_free(struct mt7921_dev *dev, struct sk_buff *skb)
+{
+ struct mt7921_tx_free *free = (struct mt7921_tx_free *)skb->data;
+ struct mt76_dev *mdev = &dev->mt76;
+ struct mt76_txwi_cache *txwi;
+ struct ieee80211_sta *sta = NULL;
+ LIST_HEAD(free_list);
+ struct sk_buff *tmp;
+ bool wake = false;
+ u8 i, count;
+
+ /* clean DMA queues and unmap buffers first */
+ mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_PSD], false);
+ mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_BE], false);
+
+ /* TODO: MT_TX_FREE_LATENCY is msdu time from the TXD is queued into PLE,
+ * to the time ack is received or dropped by hw (air + hw queue time).
+ * Should avoid accessing WTBL to get Tx airtime, and use it instead.
+ */
+ count = FIELD_GET(MT_TX_FREE_MSDU_CNT, le16_to_cpu(free->ctrl));
+ for (i = 0; i < count; i++) {
+ u32 msdu, info = le32_to_cpu(free->info[i]);
+ u8 stat;
+
+ /* 1'b1: new wcid pair.
+ * 1'b0: msdu_id with the same 'wcid pair' as above.
+ */
+ if (info & MT_TX_FREE_PAIR) {
+ struct mt7921_sta *msta;
+ struct mt76_wcid *wcid;
+ u16 idx;
+
+ count++;
+ idx = FIELD_GET(MT_TX_FREE_WLAN_ID, info);
+ wcid = rcu_dereference(dev->mt76.wcid[idx]);
+ sta = wcid_to_sta(wcid);
+ if (!sta)
+ continue;
+
+ msta = container_of(wcid, struct mt7921_sta, wcid);
+ spin_lock_bh(&dev->sta_poll_lock);
+ if (list_empty(&msta->poll_list))
+ list_add_tail(&msta->poll_list, &dev->sta_poll_list);
+ spin_unlock_bh(&dev->sta_poll_lock);
+ continue;
+ }
+
+ msdu = FIELD_GET(MT_TX_FREE_MSDU_ID, info);
+ stat = FIELD_GET(MT_TX_FREE_STATUS, info);
+
+ txwi = mt76_token_release(mdev, msdu, &wake);
+ if (!txwi)
+ continue;
+
+ mt7921_txwi_free(dev, txwi, sta, stat, &free_list);
+ }
+
+ if (wake)
+ mt76_set_tx_blocked(&dev->mt76, false);
+
+ napi_consume_skb(skb, 1);
+
+ list_for_each_entry_safe(skb, tmp, &free_list, list) {
+ skb_list_del_init(skb);
+ napi_consume_skb(skb, 1);
+ }
+
+ rcu_read_lock();
+ mt7921_mac_sta_poll(dev);
+ rcu_read_unlock();
+
+ mt76_worker_schedule(&dev->mt76.tx_worker);
+}
+
+void mt7921e_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
+ struct sk_buff *skb)
+{
+ struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);
+ __le32 *rxd = (__le32 *)skb->data;
+ enum rx_pkt_type type;
+
+ type = FIELD_GET(MT_RXD0_PKT_TYPE, le32_to_cpu(rxd[0]));
+
+ switch (type) {
+ case PKT_TYPE_TXRX_NOTIFY:
+ mt7921_mac_tx_free(dev, skb);
+ break;
+ default:
+ mt7921_queue_rx_skb(mdev, q, skb);
+ break;
+ }
+}
+
+void mt7921e_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue_entry *e)
+{
+ if (!e->txwi) {
+ dev_kfree_skb_any(e->skb);
+ return;
+ }
+
+ /* error path */
+ if (e->skb == DMA_DUMMY_DATA) {
+ struct mt76_txwi_cache *t;
+ struct mt7921_txp_common *txp;
+ u16 token;
+
+ txp = mt7921_txwi_to_txp(mdev, e->txwi);
+ token = le16_to_cpu(txp->hw.msdu_id[0]) & ~MT_MSDU_ID_VALID;
+ t = mt76_token_put(mdev, token);
+ e->skb = t ? t->skb : NULL;
+ }
+
+ if (e->skb)
+ mt76_tx_complete_skb(mdev, e->wcid, e->skb);
+}
+
+void mt7921_tx_token_put(struct mt7921_dev *dev)
+{
+ struct mt76_txwi_cache *txwi;
+ int id;
+
+ spin_lock_bh(&dev->mt76.token_lock);
+ idr_for_each_entry(&dev->mt76.token, txwi, id) {
+ mt7921_txwi_free(dev, txwi, NULL, false, NULL);
+ dev->mt76.token_count--;
+ }
+ spin_unlock_bh(&dev->mt76.token_lock);
+ idr_destroy(&dev->mt76.token);
+}
+
+int mt7921e_mac_reset(struct mt7921_dev *dev)
+{
+ int i, err;
+
+ mt7921e_mcu_drv_pmctrl(dev);
+
+ mt76_connac_free_pending_tx_skbs(&dev->pm, NULL);
+
+ mt76_wr(dev, MT_WFDMA0_HOST_INT_ENA, 0);
+ mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0x0);
+
+ set_bit(MT76_RESET, &dev->mphy.state);
+ set_bit(MT76_MCU_RESET, &dev->mphy.state);
+ wake_up(&dev->mt76.mcu.wait);
+ skb_queue_purge(&dev->mt76.mcu.res_q);
+
+ mt76_txq_schedule_all(&dev->mphy);
+
+ mt76_worker_disable(&dev->mt76.tx_worker);
+ napi_disable(&dev->mt76.napi[MT_RXQ_MAIN]);
+ napi_disable(&dev->mt76.napi[MT_RXQ_MCU]);
+ napi_disable(&dev->mt76.napi[MT_RXQ_MCU_WA]);
+ napi_disable(&dev->mt76.tx_napi);
+
+ mt7921_tx_token_put(dev);
+ idr_init(&dev->mt76.token);
+
+ mt7921_wpdma_reset(dev, true);
+
+ local_bh_disable();
+ mt76_for_each_q_rx(&dev->mt76, i) {
+ napi_enable(&dev->mt76.napi[i]);
+ napi_schedule(&dev->mt76.napi[i]);
+ }
+ local_bh_enable();
+
+ clear_bit(MT76_MCU_RESET, &dev->mphy.state);
+
+ mt76_wr(dev, MT_WFDMA0_HOST_INT_ENA,
+ MT_INT_RX_DONE_ALL | MT_INT_TX_DONE_ALL |
+ MT_INT_MCU_CMD);
+ mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0xff);
+
+ err = mt7921_run_firmware(dev);
+ if (err)
+ goto out;
+
+ err = mt7921_mcu_set_eeprom(dev);
+ if (err)
+ goto out;
+
+ err = mt7921_mac_init(dev);
+ if (err)
+ goto out;
+
+ err = __mt7921_start(&dev->phy);
+out:
+ clear_bit(MT76_RESET, &dev->mphy.state);
+
+ local_bh_disable();
+ napi_enable(&dev->mt76.tx_napi);
+ napi_schedule(&dev->mt76.tx_napi);
+ local_bh_enable();
+
+ mt76_worker_enable(&dev->mt76.tx_worker);
+
+ return err;
+}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.