drivers/net/ethernet/ti/cpsw_priv.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/ti/cpsw_priv.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/ti/cpsw_priv.c
Extension
.c
Size
40086 bytes
Lines
1604
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 (cpsw->tx_irq_disabled) {
			cpsw->tx_irq_disabled = false;
			enable_irq(cpsw->irqs_table[1]);
		}
	}

	return num_tx;
}
EXPORT_SYMBOL_GPL(cpsw_tx_poll);

int cpsw_rx_mq_poll(struct napi_struct *napi_rx, int budget)
{
	struct cpsw_common	*cpsw = napi_to_cpsw(napi_rx);
	int			num_rx, cur_budget, ch;
	u32			ch_map;
	struct cpsw_vector	*rxv;

	/* process every unprocessed channel */
	ch_map = cpdma_ctrl_rxchs_state(cpsw->dma);
	for (ch = 0, num_rx = 0; ch_map; ch_map >>= 1, ch++) {
		if (!(ch_map & 0x01))
			continue;

		rxv = &cpsw->rxv[ch];
		if (unlikely(rxv->budget > budget - num_rx))
			cur_budget = budget - num_rx;
		else
			cur_budget = rxv->budget;

		num_rx += cpdma_chan_process(rxv->ch, cur_budget);
		if (num_rx >= budget)
			break;
	}

	if (num_rx < budget) {
		napi_complete_done(napi_rx, num_rx);
		writel(0xff, &cpsw->wr_regs->rx_en);
	}

	return num_rx;
}
EXPORT_SYMBOL_GPL(cpsw_rx_mq_poll);

int cpsw_rx_poll(struct napi_struct *napi_rx, int budget)
{
	struct cpsw_common *cpsw = napi_to_cpsw(napi_rx);
	int num_rx;

	num_rx = cpdma_chan_process(cpsw->rxv[0].ch, budget);
	if (num_rx < budget) {
		napi_complete_done(napi_rx, num_rx);
		writel(0xff, &cpsw->wr_regs->rx_en);
		if (cpsw->rx_irq_disabled) {
			cpsw->rx_irq_disabled = false;
			enable_irq(cpsw->irqs_table[0]);
		}
	}

	return num_rx;
}
EXPORT_SYMBOL_GPL(cpsw_rx_poll);

void cpsw_rx_vlan_encap(struct sk_buff *skb)
{
	struct cpsw_priv *priv = netdev_priv(skb->dev);
	u32 rx_vlan_encap_hdr = *((u32 *)skb->data);
	struct cpsw_common *cpsw = priv->cpsw;
	u16 vtag, vid, prio, pkt_type;

	/* Remove VLAN header encapsulation word */
	skb_pull(skb, CPSW_RX_VLAN_ENCAP_HDR_SIZE);

	pkt_type = (rx_vlan_encap_hdr >>
		    CPSW_RX_VLAN_ENCAP_HDR_PKT_TYPE_SHIFT) &
		    CPSW_RX_VLAN_ENCAP_HDR_PKT_TYPE_MSK;
	/* Ignore unknown & Priority-tagged packets*/
	if (pkt_type == CPSW_RX_VLAN_ENCAP_HDR_PKT_RESERV ||
	    pkt_type == CPSW_RX_VLAN_ENCAP_HDR_PKT_PRIO_TAG)
		return;

	vid = (rx_vlan_encap_hdr >>
	       CPSW_RX_VLAN_ENCAP_HDR_VID_SHIFT) &
	       VLAN_VID_MASK;
	/* Ignore vid 0 and pass packet as is */
	if (!vid)
		return;

	/* Untag P0 packets if set for vlan */
	if (!cpsw_ale_get_vlan_p0_untag(cpsw->ale, vid)) {
		prio = (rx_vlan_encap_hdr >>

Annotation

Implementation Notes