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Commit 9f40dead authored by Michael Chan's avatar Michael Chan Committed by David S. Miller
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[TG3]: Add PHY loopback test 



Improve ethtool loopback self test by adding PHY loopback to the
existing MAC loopback test.

Signed-off-by: default avatarMichael Chan <mchan@broadcom.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4009a93d

drivers/net/tg3.c

+53 −20
Original line number Diff line number Diff line
@@ -7935,9 +7935,12 @@ static int tg3_test_memory(struct tg3 *tp) 
	return err;

}



static int tg3_test_loopback(struct tg3 *tp)

#define TG3_MAC_LOOPBACK	0

#define TG3_PHY_LOOPBACK	1



static int tg3_run_loopback(struct tg3 *tp, int loopback_mode)

{

	u32 mac_mode, send_idx, rx_start_idx, rx_idx, tx_idx, opaque_key;

	u32 mac_mode, rx_start_idx, rx_idx, tx_idx, opaque_key;

	u32 desc_idx;

	struct sk_buff *skb, *rx_skb;

	u8 *tx_data;
@@ -7945,17 +7948,25 @@ static int tg3_test_loopback(struct tg3 *tp) 
	int num_pkts, tx_len, rx_len, i, err;

	struct tg3_rx_buffer_desc *desc;



	if (!netif_running(tp->dev))

		return -ENODEV;



	err = -EIO;



	tg3_reset_hw(tp);



	if (loopback_mode == TG3_MAC_LOOPBACK) {

		mac_mode = (tp->mac_mode & ~MAC_MODE_PORT_MODE_MASK) |

			   MAC_MODE_PORT_INT_LPBACK | MAC_MODE_LINK_POLARITY |

			   MAC_MODE_PORT_MODE_GMII;

		tw32(MAC_MODE, mac_mode);

	} else if (loopback_mode == TG3_PHY_LOOPBACK) {

		mac_mode = (tp->mac_mode & ~MAC_MODE_PORT_MODE_MASK) |

			   MAC_MODE_LINK_POLARITY | MAC_MODE_PORT_MODE_GMII;

		if ((tp->phy_id & PHY_ID_MASK) == PHY_ID_BCM5401)

			mac_mode &= ~MAC_MODE_LINK_POLARITY;

		tw32(MAC_MODE, mac_mode);



		tg3_writephy(tp, MII_BMCR, BMCR_LOOPBACK | BMCR_FULLDPLX |

					   BMCR_SPEED1000);

	}

	else

		return -EINVAL;



	err = -EIO;



	tx_len = 1514;

	skb = dev_alloc_skb(tx_len);
@@ -7977,15 +7988,15 @@ static int tg3_test_loopback(struct tg3 *tp) 


	rx_start_idx = tp->hw_status->idx[0].rx_producer;



	send_idx = 0;

	num_pkts = 0;



	tg3_set_txd(tp, send_idx, map, tx_len, 0, 1);

	tg3_set_txd(tp, tp->tx_prod, map, tx_len, 0, 1);



	send_idx++;

	tp->tx_prod++;

	num_pkts++;



	tw32_tx_mbox(MAILBOX_SNDHOST_PROD_IDX_0 + TG3_64BIT_REG_LOW, send_idx);

	tw32_tx_mbox(MAILBOX_SNDHOST_PROD_IDX_0 + TG3_64BIT_REG_LOW,

		     tp->tx_prod);

	tr32_mailbox(MAILBOX_SNDHOST_PROD_IDX_0 + TG3_64BIT_REG_LOW);



	udelay(10);
@@ -7998,7 +8009,7 @@ static int tg3_test_loopback(struct tg3 *tp) 


		tx_idx = tp->hw_status->idx[0].tx_consumer;

		rx_idx = tp->hw_status->idx[0].rx_producer;

		if ((tx_idx == send_idx) &&

		if ((tx_idx == tp->tx_prod) &&

		    (rx_idx == (rx_start_idx + num_pkts)))

			break;

	}
@@ -8006,7 +8017,7 @@ static int tg3_test_loopback(struct tg3 *tp) 
	pci_unmap_single(tp->pdev, map, tx_len, PCI_DMA_TODEVICE);

	dev_kfree_skb(skb);



	if (tx_idx != send_idx)

	if (tx_idx != tp->tx_prod)

		goto out;



	if (rx_idx != rx_start_idx + num_pkts)
@@ -8042,6 +8053,30 @@ out: 
	return err;

}



#define TG3_MAC_LOOPBACK_FAILED		1

#define TG3_PHY_LOOPBACK_FAILED		2

#define TG3_LOOPBACK_FAILED		(TG3_MAC_LOOPBACK_FAILED |	\

					 TG3_PHY_LOOPBACK_FAILED)



static int tg3_test_loopback(struct tg3 *tp)

{

	int err = 0;



	if (!netif_running(tp->dev))

		return TG3_LOOPBACK_FAILED;



	tg3_reset_hw(tp);



	if (tg3_run_loopback(tp, TG3_MAC_LOOPBACK))

		err |= TG3_MAC_LOOPBACK_FAILED;

	if (!(tp->tg3_flags2 & TG3_FLG2_PHY_SERDES)) {

		if (tg3_run_loopback(tp, TG3_PHY_LOOPBACK))

			err |= TG3_PHY_LOOPBACK_FAILED;

	}



	return err;

}



static void tg3_self_test(struct net_device *dev, struct ethtool_test *etest,

			  u64 *data)

{
@@ -8082,10 +8117,8 @@ static void tg3_self_test(struct net_device *dev, struct ethtool_test *etest, 
			etest->flags |= ETH_TEST_FL_FAILED;

			data[3] = 1;

		}

		if (tg3_test_loopback(tp) != 0) {

		if ((data[4] = tg3_test_loopback(tp)) != 0)

			etest->flags |= ETH_TEST_FL_FAILED;

			data[4] = 1;

		}



		tg3_full_unlock(tp);