C++ (Cpp) ag71xx_rx_packets Examples

Example #1

File: ag71xx_main.c Project: Cribstone/linino

static int ag71xx_poll(struct napi_struct *napi, int limit)
{
	struct ag71xx *ag = container_of(napi, struct ag71xx, napi);
#ifdef AG71XX_NAPI_TX
	struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
#endif
	struct net_device *dev = ag->dev;
	unsigned long flags;
	u32 status;
	int done;

#ifdef AG71XX_NAPI_TX
	ar71xx_ddr_flush(pdata->flush_reg);
	ag71xx_tx_packets(ag);
#endif

	DBG("%s: processing RX ring\n", dev->name);
	done = ag71xx_rx_packets(ag, limit);

	/* TODO: add OOM handler */

	status = ag71xx_rr(ag, AG71XX_REG_INT_STATUS);
	status &= AG71XX_INT_POLL;

	if ((done < limit) && (!status)) {
		DBG("%s: disable polling mode, done=%d, status=%x\n",
			dev->name, done, status);

		netif_rx_complete(dev, napi);

		/* enable interrupts */
		spin_lock_irqsave(&ag->lock, flags);
		ag71xx_int_enable(ag, AG71XX_INT_POLL);
		spin_unlock_irqrestore(&ag->lock, flags);
		return 0;
	}

	if (status & AG71XX_INT_RX_OF) {
		if (netif_msg_rx_err(ag))
			printk(KERN_ALERT "%s: rx owerflow, restarting dma\n",
				dev->name);

		/* ack interrupt */
		ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_OF);
		/* restart RX */
		ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE);
	}

	DBG("%s: stay in polling mode, done=%d, status=%x\n",
			dev->name, done, status);
	return 1;
}

Example #2

File: ag71xx_main.c Project: mirko/openwrt-x-burst

static int ag71xx_poll(struct napi_struct *napi, int limit)
{
	struct ag71xx *ag = container_of(napi, struct ag71xx, napi);
	struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
	struct net_device *dev = ag->dev;
	struct ag71xx_ring *rx_ring;
	unsigned long flags;
	u32 status;
	int done;

	pdata->ddr_flush();
	ag71xx_tx_packets(ag);

	DBG("%s: processing RX ring\n", dev->name);
	done = ag71xx_rx_packets(ag, limit);

	rx_ring = &ag->rx_ring;
	if (rx_ring->buf[rx_ring->dirty % AG71XX_RX_RING_SIZE].skb == NULL)
		goto oom;

	status = ag71xx_rr(ag, AG71XX_REG_RX_STATUS);
	if (unlikely(status & RX_STATUS_OF)) {
		ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_OF);
		dev->stats.rx_fifo_errors++;

		/* restart RX */
		ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE);
	}

	if (done < limit) {
		if (status & RX_STATUS_PR)
			goto more;

		status = ag71xx_rr(ag, AG71XX_REG_TX_STATUS);
		if (status & TX_STATUS_PS)
			goto more;

		DBG("%s: disable polling mode, done=%d, limit=%d\n",
			dev->name, done, limit);

		netif_rx_complete(dev, napi);

		/* enable interrupts */
		spin_lock_irqsave(&ag->lock, flags);
		ag71xx_int_enable(ag, AG71XX_INT_POLL);
		spin_unlock_irqrestore(&ag->lock, flags);
		return done;
	}

 more:
	DBG("%s: stay in polling mode, done=%d, limit=%d\n",
			dev->name, done, limit);
	return done;

 oom:
	if (netif_msg_rx_err(ag))
		printk(KERN_DEBUG "%s: out of memory\n", dev->name);

	mod_timer(&ag->oom_timer, jiffies + AG71XX_OOM_REFILL);
	netif_rx_complete(dev, napi);
	return 0;
}