drivers/net/wireless/mediatek/mt76/mt7925/pci_mac.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/mediatek/mt76/mt7925/pci_mac.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/mediatek/mt76/mt7925/pci_mac.c
Extension
.c
Size
3897 bytes
Lines
162
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (time_after(jiffies, msta->deflink.last_txs + HZ / 4)) {
			info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
			msta->deflink.last_txs = jiffies;
		}
	}

	pid = mt76_tx_status_skb_add(mdev, wcid, tx_info->skb);
	mt7925_mac_write_txwi(mdev, txwi_ptr, tx_info->skb, wcid, key,
			      pid, qid, 0);

	txp = (struct mt76_connac_hw_txp *)(txwi + MT_TXD_SIZE);
	memset(txp, 0, sizeof(struct mt76_connac_hw_txp));
	mt76_connac_write_hw_txp(mdev, tx_info, txp, id);

	tx_info->skb = NULL;

	return 0;
}

void mt7925_tx_token_put(struct mt792x_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) {
		mt7925_txwi_free(dev, txwi, NULL, NULL, NULL);
		dev->mt76.token_count--;
	}
	spin_unlock_bh(&dev->mt76.token_lock);
	idr_destroy(&dev->mt76.token);
}

int mt7925e_mac_reset(struct mt792x_dev *dev)
{
	const struct mt792x_irq_map *irq_map = dev->irq_map;
	int i, err;

	mt792xe_mcu_drv_pmctrl(dev);

	mt76_connac_free_pending_tx_skbs(&dev->pm, NULL);

	mt76_wr(dev, dev->irq_map->host_irq_enable, 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);
	if (irq_map->rx.data_complete_mask)
		napi_disable(&dev->mt76.napi[MT_RXQ_MAIN]);
	if (irq_map->rx.wm_complete_mask)
		napi_disable(&dev->mt76.napi[MT_RXQ_MCU]);
	if (irq_map->rx.wm2_complete_mask)
		napi_disable(&dev->mt76.napi[MT_RXQ_MCU_WA]);
	if (irq_map->tx.all_complete_mask)
		napi_disable(&dev->mt76.tx_napi);

	mt7925_tx_token_put(dev);
	idr_init(&dev->mt76.token);

	mt792x_wpdma_reset(dev, true);

	mt76_for_each_q_rx(&dev->mt76, i) {
		napi_enable(&dev->mt76.napi[i]);
	}
	napi_enable(&dev->mt76.tx_napi);

	local_bh_disable();
	mt76_for_each_q_rx(&dev->mt76, i) {
		napi_schedule(&dev->mt76.napi[i]);
	}
	napi_schedule(&dev->mt76.tx_napi);
	local_bh_enable();

	dev->fw_assert = false;
	clear_bit(MT76_MCU_RESET, &dev->mphy.state);

	mt76_wr(dev, dev->irq_map->host_irq_enable,
		dev->irq_map->tx.all_complete_mask |
		dev->irq_map->rx.data_complete_mask |
		dev->irq_map->rx.wm_complete_mask |
		dev->irq_map->rx.wm2_complete_mask |
		MT_INT_MCU_CMD);
	mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0xff);

Annotation

Implementation Notes