drivers/net/wireless/realtek/rtw89/pci.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/realtek/rtw89/pci.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/realtek/rtw89/pci.c
Extension
.c
Size
135190 bytes
Lines
4880
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: exported/initcall integration point
Status
integration 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 (!skb) {
			rtw89_err(rtwdev, "failed to pre-release fwcmd\n");
			return;
		}
		skb_queue_tail(&rtwpci->h2c_release_queue, skb);
	}

	qlen = skb_queue_len(&rtwpci->h2c_release_queue);
	if (!release_all)
	       qlen = qlen > RTW89_PCI_MULTITAG ? qlen - RTW89_PCI_MULTITAG : 0;

	while (qlen--) {
		skb = skb_dequeue(&rtwpci->h2c_release_queue);
		if (!skb) {
			rtw89_err(rtwdev, "failed to release fwcmd\n");
			return;
		}
		tx_data = RTW89_PCI_TX_SKB_CB(skb);
		dma_unmap_single(&rtwpci->pdev->dev, tx_data->dma, skb->len,
				 DMA_TO_DEVICE);
		dev_kfree_skb_any(skb);
	}
}

static void rtw89_pci_reclaim_tx_fwcmd(struct rtw89_dev *rtwdev,
				       struct rtw89_pci *rtwpci)
{
	struct rtw89_pci_tx_ring *tx_ring = &rtwpci->tx.rings[RTW89_TXCH_CH12];
	u32 cnt;

	cnt = rtw89_pci_txbd_recalc(rtwdev, tx_ring);
	if (!cnt)
		return;
	rtw89_pci_release_fwcmd(rtwdev, rtwpci, cnt, false);
}

static u32 rtw89_pci_rxbd_recalc(struct rtw89_dev *rtwdev,
				 struct rtw89_pci_rx_ring *rx_ring)
{
	struct rtw89_pci_dma_ring *bd_ring = &rx_ring->bd_ring;
	u32 addr_idx = bd_ring->addr.idx;
	u32 cnt, idx;

	idx = rtw89_read32(rtwdev, addr_idx);
	cnt = rtw89_pci_dma_recalc(rtwdev, bd_ring, idx, false);

	return cnt;
}

static void rtw89_pci_sync_skb_for_cpu(struct rtw89_dev *rtwdev,
				       struct sk_buff *skb)
{
	struct rtw89_pci_rx_info *rx_info;
	dma_addr_t dma;

	rx_info = RTW89_PCI_RX_SKB_CB(skb);
	dma = rx_info->dma;
	dma_sync_single_for_cpu(rtwdev->dev, dma, RTW89_PCI_RX_BUF_SIZE,
				DMA_FROM_DEVICE);
}

static void rtw89_pci_sync_skb_for_device(struct rtw89_dev *rtwdev,
					  struct sk_buff *skb)
{
	struct rtw89_pci_rx_info *rx_info;
	dma_addr_t dma;

	rx_info = RTW89_PCI_RX_SKB_CB(skb);
	dma = rx_info->dma;
	dma_sync_single_for_device(rtwdev->dev, dma, RTW89_PCI_RX_BUF_SIZE,
				   DMA_FROM_DEVICE);
}

static void rtw89_pci_rxbd_info_update(struct rtw89_dev *rtwdev,
				       struct sk_buff *skb)
{
	struct rtw89_pci_rx_info *rx_info = RTW89_PCI_RX_SKB_CB(skb);
	struct rtw89_pci_rxbd_info *rxbd_info;
	__le32 info;

	rxbd_info = (struct rtw89_pci_rxbd_info *)skb->data;
	info = rxbd_info->dword;

	rx_info->fs = le32_get_bits(info, RTW89_PCI_RXBD_FS);
	rx_info->ls = le32_get_bits(info, RTW89_PCI_RXBD_LS);
	rx_info->len = le32_get_bits(info, RTW89_PCI_RXBD_WRITE_SIZE);
	rx_info->tag = le32_get_bits(info, RTW89_PCI_RXBD_TAG);
}

static int rtw89_pci_validate_rx_tag(struct rtw89_dev *rtwdev,

Annotation

Implementation Notes