// SPDX-License-Identifier: ISC
/* Copyright (C) 2020 MediaTek Inc.
*
* Author: Ryder Lee <ryder.lee@mediatek.com>
* Roy Luo <royluo@google.com>
* Felix Fietkau <nbd@nbd.name>
* Lorenzo Bianconi <lorenzo@kernel.org>
*/
#include <linux/etherdevice.h>
#include <linux/timekeeping.h>
#include "mt7615.h"
#include "../dma.h"
#include "mac.h"
void mt7615_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 mt7615_dev *dev;
struct mt7615_txp_common *txp;
u16 token;
dev = container_of(mdev, struct mt7615_dev, mt76);
txp = mt7615_txwi_to_txp(mdev, e->txwi);
if (is_mt7615(&dev->mt76))
token = le16_to_cpu(txp->fw.token);
else
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);
}
static void
mt7615_write_hw_txp(struct mt7615_dev *dev, struct mt76_tx_info *tx_info,
void *txp_ptr, u32 id)
{
struct mt7615_hw_txp *txp = txp_ptr;
struct mt7615_txp_ptr *ptr = &txp->ptr[0];
int i, nbuf = tx_info->nbuf - 1;
u32 last_mask;
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);
if (is_mt7663(&dev->mt76))
last_mask = MT_TXD_LEN_LAST;
else
last_mask = MT_TXD_LEN_AMSDU_LAST |
MT_TXD_LEN_MSDU_LAST;
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 |= last_mask;
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);
}
}
}
static void
mt7615_write_fw_txp(struct mt7615_dev *dev, struct mt76_tx_info *tx_info,
void *txp_ptr, u32 id)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx_info->skb->data;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_info->skb);
struct ieee80211_key_conf *key = info->control.hw_key;
struct ieee80211_vif *vif = info->control.vif;
struct mt7615_fw_txp *txp = txp_ptr;
int nbuf = tx_info->nbuf - 1;
int i;
for (i = 0; i < nbuf; i++) {
txp->buf[i] = cpu_to_le32(tx_info->buf[i + 1].addr);
txp->len[i] = cpu_to_le16(tx_info->buf[i + 1].len);
}
txp->nbuf = nbuf;
/* pass partial skb header to fw */
tx_info->buf[0].len = MT_TXD_SIZE + sizeof(*txp);
tx_info->buf[1].len = MT_CT_PARSE_LEN;
tx_info->buf[1].skip_unmap = true;
tx_info->nbuf = MT_CT_DMA_BUF_NUM;
txp->flags = cpu_to_le16(MT_CT_INFO_APPLY_TXD);
if (!key)
txp->flags |= cpu_to_le16(MT_CT_INFO_NONE_CIPHER_FRAME);
if (ieee80211_is_mgmt(hdr->frame_control))
txp->flags |= cpu_to_le16(MT_CT_INFO_MGMT_FRAME);
if (vif) {
struct mt76_vif *mvif = (struct mt76_vif *)vif->drv_priv;
txp->bss_idx = mvif->idx;
}
txp->token = cpu_to_le16(id);
txp->rept_wds_wcid = 0xff;
}
int mt7615_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 mt7615_dev *dev = container_of(mdev, struct mt7615_dev, mt76);
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_info->skb);
struct ieee80211_key_conf *key = info->control.hw_key;
int pid, id;
u8 *txwi = (u8 *)txwi_ptr;
struct mt76_txwi_cache *t;
struct mt7615_sta *msta;
void *txp;
msta = wcid ? container_of(wcid, struct mt7615_sta, wcid) : NULL;
if (!wcid)
wcid = &dev->mt76.global_wcid;
if ((info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) && msta) {
struct mt7615_phy *phy = &dev->phy;
if ((info->hw_queue & MT_TX_HW_QUEUE_EXT_PHY) && mdev->phy2)
phy = mdev->phy2->priv;
spin_lock_bh(&dev->mt76.lock);
mt7615_mac_set_rates(phy, msta, &info->control.rates[0],
msta->rates);
spin_unlock_bh(&dev->mt76.lock);
}
t = (struct mt76_txwi_cache *)(txwi + mdev->drv->txwi_size);
t->skb = tx_info->skb;
id = mt76_token_get(mdev, &t);
if (id < 0)
return id;
pid = mt76_tx_status_skb_add(mdev, wcid, tx_info->skb);
mt7615_mac_write_txwi(dev, txwi_ptr, tx_info->skb, wcid, sta,
pid, key, false);
txp = txwi + MT_TXD_SIZE;
memset(txp, 0, sizeof(struct mt7615_txp_common));
if (is_mt7615(&dev->mt76))
mt7615_write_fw_txp(dev, tx_info, txp, id);
else
mt7615_write_hw_txp(dev, tx_info, txp, id);
tx_info->skb = DMA_DUMMY_DATA;
return 0;
}
void mt7615_dma_reset(struct mt7615_dev *dev)
{
int i;
mt76_clear(dev, MT_WPDMA_GLO_CFG,
MT_WPDMA_GLO_CFG_RX_DMA_EN | MT_WPDMA_GLO_CFG_TX_DMA_EN |
MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE);
usleep_range(1000, 2000);
for (i = 0; i < __MT_TXQ_MAX; i++)
mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[i], true);
for (i = 0; i < __MT_MCUQ_MAX; i++)
mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[i], true);
mt76_for_each_q_rx(&dev->mt76, i)
mt76_queue_rx_reset(dev, i);
mt76_tx_status_check(&dev->mt76, true);
mt7615_dma_start(dev);
}
EXPORT_SYMBOL_GPL(mt7615_dma_reset);
static void
mt7615_hif_int_event_trigger(struct mt7615_dev *dev, u8 event)
{
u32 reg = MT_MCU_INT_EVENT;
if (is_mt7663(&dev->mt76))
reg = MT7663_MCU_INT_EVENT;
mt76_wr(dev, reg, event);
mt7622_trigger_hif_int(dev, true);
mt7622_trigger_hif_int(dev, false);
}
static bool
mt7615_wait_reset_state(struct mt7615_dev *dev, u32 state)
{
bool ret;
ret = wait_event_timeout(dev->reset_wait,
(READ_ONCE(dev->reset_state) & state),
MT7615_RESET_TIMEOUT);
WARN(!ret, "Timeout waiting for MCU reset state %x\n", state);
return ret;
}
static void
mt7615_update_vif_beacon(void *priv, u8 *mac, struct ieee80211_vif *vif)
{
struct ieee80211_hw *hw = priv;
struct mt7615_dev *dev = mt7615_hw_dev(hw);
switch (vif->type) {
case NL80211_IFTYPE_MESH_POINT:
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_AP:
mt7615_mcu_add_beacon(dev, hw, vif,
vif->bss_conf.enable_beacon);
break;
default:
break;
}
}
static void
mt7615_update_beacons(struct mt7615_dev *dev)
{
ieee80211_iterate_active_interfaces(dev->mt76.hw,
IEEE80211_IFACE_ITER_RESUME_ALL,
mt7615_update_vif_beacon, dev->mt76.hw);
if (!dev->mt76.phy2)
return;
ieee80211_iterate_active_interfaces(dev->mt76.phy2->hw,
IEEE80211_IFACE_ITER_RESUME_ALL,
mt7615_update_vif_beacon, dev->mt76.phy2->hw);
}
void mt7615_mac_reset_work(struct work_struct *work)
{
struct mt7615_phy *phy2;
struct mt76_phy *ext_phy;
struct mt7615_dev *dev;
unsigned long timeout;
dev = container_of(work, struct mt7615_dev, reset_work);
ext_phy = dev->mt76.phy2;
phy2 = ext_phy ? ext_phy->priv : NULL;
if (!(READ_ONCE(dev->reset_state) & MT_MCU_CMD_STOP_PDMA))
return;
ieee80211_stop_queues(mt76_hw(dev));
if (ext_phy)
ieee80211_stop_queues(ext_phy->hw);
set_bit(MT76_RESET, &dev->mphy.state);
set_bit(MT76_MCU_RESET, &dev->mphy.state);
wake_up(&dev->mt76.mcu.wait);
cancel_delayed_work_sync(&dev->mphy.mac_work);
del_timer_sync(&dev->phy.roc_timer);
cancel_work_sync(&dev->phy.roc_work);
if (phy2) {
set_bit(MT76_RESET, &phy2->mt76->state);
cancel_delayed_work_sync(&phy2->mt76->mac_work);
del_timer_sync(&phy2->roc_timer);
cancel_work_sync(&phy2->roc_work);
}
/* lock/unlock all queues to ensure that no tx is pending */
mt76_txq_schedule_all(&dev->mphy);
if (ext_phy)
mt76_txq_schedule_all(ext_phy);
mt76_worker_disable(&dev->mt76.tx_worker);
napi_disable(&dev->mt76.napi[0]);
napi_disable(&dev->mt76.napi[1]);
napi_disable(&dev->mt76.tx_napi);
mt7615_mutex_acquire(dev);
mt7615_hif_int_event_trigger(dev, MT_MCU_INT_EVENT_PDMA_STOPPED);
if (mt7615_wait_reset_state(dev, MT_MCU_CMD_RESET_DONE)) {
mt7615_dma_reset(dev);
mt7615_tx_token_put(dev);
idr_init(&dev->mt76.token);
mt76_wr(dev, MT_WPDMA_MEM_RNG_ERR, 0);
mt7615_hif_int_event_trigger(dev, MT_MCU_INT_EVENT_PDMA_INIT);
mt7615_wait_reset_state(dev, MT_MCU_CMD_RECOVERY_DONE);
}
clear_bit(MT76_MCU_RESET, &dev->mphy.state);
clear_bit(MT76_RESET, &dev->mphy.state);
if (phy2)
clear_bit(MT76_RESET, &phy2->mt76->state);
mt76_worker_enable(&dev->mt76.tx_worker);
local_bh_disable();
napi_enable(&dev->mt76.tx_napi);
napi_schedule(&dev->mt76.tx_napi);
napi_enable(&dev->mt76.napi[0]);
napi_schedule(&dev->mt76.napi[0]);
napi_enable(&dev->mt76.napi[1]);
napi_schedule(&dev->mt76.napi[1]);
local_bh_enable();
ieee80211_wake_queues(mt76_hw(dev));
if (ext_phy)
ieee80211_wake_queues(ext_phy->hw);
mt7615_hif_int_event_trigger(dev, MT_MCU_INT_EVENT_RESET_DONE);
mt7615_wait_reset_state(dev, MT_MCU_CMD_NORMAL_STATE);
mt7615_update_beacons(dev);
mt7615_mutex_release(dev);
timeout = mt7615_get_macwork_timeout(dev);
ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mphy.mac_work,
timeout);
if (phy2)
ieee80211_queue_delayed_work(ext_phy->hw,
&phy2->mt76->mac_work, timeout);
}