atl1c_main.c

/* Calculate the transmit packet descript needed*/
static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
{
	u16 tpd_req;
	u16 proto_hdr_len = 0;

	tpd_req = skb_shinfo(skb)->nr_frags + 1;

	if (skb_is_gso(skb)) {
		proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
		if (proto_hdr_len < skb_headlen(skb))
			tpd_req++;
		if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
			tpd_req++;
	}
	return tpd_req;
}

static int atl1c_tso_csum(struct atl1c_adapter *adapter,
			  struct sk_buff *skb,
			  struct atl1c_tpd_desc **tpd,
			  enum atl1c_trans_queue type)
{
	struct pci_dev *pdev = adapter->pdev;
	u8 hdr_len;
	u32 real_len;
	unsigned short offload_type;
	int err;

	if (skb_is_gso(skb)) {
		if (skb_header_cloned(skb)) {
			err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
			if (unlikely(err))
				return -1;
		}
		offload_type = skb_shinfo(skb)->gso_type;

		if (offload_type & SKB_GSO_TCPV4) {
			real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
					+ ntohs(ip_hdr(skb)->tot_len));

			if (real_len < skb->len)
				pskb_trim(skb, real_len);

			hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
			if (unlikely(skb->len == hdr_len)) {
				/* only xsum need */
				if (netif_msg_tx_queued(adapter))
					dev_warn(&pdev->dev,
						"IPV4 tso with zero data??\n");
				goto check_sum;
			} else {
				ip_hdr(skb)->check = 0;
				tcp_hdr(skb)->check = ~csum_tcpudp_magic(
							ip_hdr(skb)->saddr,
							ip_hdr(skb)->daddr,
							0, IPPROTO_TCP, 0);
				(*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
			}
		}

		if (offload_type & SKB_GSO_TCPV6) {
			struct atl1c_tpd_ext_desc *etpd =
				*(struct atl1c_tpd_ext_desc **)(tpd);

			memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
			*tpd = atl1c_get_tpd(adapter, type);
			ipv6_hdr(skb)->payload_len = 0;
			/* check payload == 0 byte ? */
			hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
			if (unlikely(skb->len == hdr_len)) {
				/* only xsum need */
				if (netif_msg_tx_queued(adapter))
					dev_warn(&pdev->dev,
						"IPV6 tso with zero data??\n");
				goto check_sum;
			} else
				tcp_hdr(skb)->check = ~csum_ipv6_magic(
						&ipv6_hdr(skb)->saddr,
						&ipv6_hdr(skb)->daddr,
						0, IPPROTO_TCP, 0);
			etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
			etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
			etpd->pkt_len = cpu_to_le32(skb->len);
			(*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
		}

		(*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
		(*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
				TPD_TCPHDR_OFFSET_SHIFT;
		(*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
				TPD_MSS_SHIFT;
		return 0;
	}

check_sum:
	if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
		u8 css, cso;
		cso = skb_checksum_start_offset(skb);

		if (unlikely(cso & 0x1)) {
			if (netif_msg_tx_err(adapter))
				dev_err(&adapter->pdev->dev,
					"payload offset should not an event number\n");
			return -1;
		} else {
			css = cso + skb->csum_offset;

			(*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
					TPD_PLOADOFFSET_SHIFT;
			(*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
					TPD_CCSUM_OFFSET_SHIFT;
			(*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
		}
	}
	return 0;
}

static void atl1c_tx_map(struct atl1c_adapter *adapter,
		      struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
			enum atl1c_trans_queue type)
{
	struct atl1c_tpd_desc *use_tpd = NULL;
	struct atl1c_buffer *buffer_info = NULL;
	u16 buf_len = skb_headlen(skb);
	u16 map_len = 0;
	u16 mapped_len = 0;
	u16 hdr_len = 0;
	u16 nr_frags;
	u16 f;
	int tso;

	nr_frags = skb_shinfo(skb)->nr_frags;
	tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
	if (tso) {
		/* TSO */
		map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
		use_tpd = tpd;

		buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
		buffer_info->length = map_len;
		buffer_info->dma = pci_map_single(adapter->pdev,
					skb->data, hdr_len, PCI_DMA_TODEVICE);
		ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
		ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
			ATL1C_PCIMAP_TODEVICE);
		mapped_len += map_len;
		use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
		use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
	}

	if (mapped_len < buf_len) {
		/* mapped_len == 0, means we should use the first tpd,
		   which is given by caller  */
		if (mapped_len == 0)
			use_tpd = tpd;
		else {
			use_tpd = atl1c_get_tpd(adapter, type);
			memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
		}
		buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
		buffer_info->length = buf_len - mapped_len;
		buffer_info->dma =
			pci_map_single(adapter->pdev, skb->data + mapped_len,
					buffer_info->length, PCI_DMA_TODEVICE);
		ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
		ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
			ATL1C_PCIMAP_TODEVICE);
		use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
		use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
	}

	for (f = 0; f < nr_frags; f++) {
		struct skb_frag_struct *frag;

		frag = &skb_shinfo(skb)->frags[f];

		use_tpd = atl1c_get_tpd(adapter, type);
		memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));

		buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
		buffer_info->length = frag->size;
		buffer_info->dma =
			pci_map_page(adapter->pdev, frag->page,
					frag->page_offset,
					buffer_info->length,
					PCI_DMA_TODEVICE);
		ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
		ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
			ATL1C_PCIMAP_TODEVICE);
		use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
		use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
	}

	/* The last tpd */
	use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
	/* The last buffer info contain the skb address,
	   so it will be free after unmap */
	buffer_info->skb = skb;
}

static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
			   struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
{
	struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
	u32 prod_data;

	AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
	switch (type) {
	case atl1c_trans_high:
		prod_data &= 0xFFFF0000;
		prod_data |= tpd_ring->next_to_use & 0xFFFF;
		break;
	case atl1c_trans_normal:
		prod_data &= 0x0000FFFF;
		prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
		break;
	default:
		break;
	}
	wmb();
	AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
}

static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
					  struct net_device *netdev)
{
	struct atl1c_adapter *adapter = netdev_priv(netdev);
	unsigned long flags;
	u16 tpd_req = 1;
	struct atl1c_tpd_desc *tpd;
	enum atl1c_trans_queue type = atl1c_trans_normal;

	if (test_bit(__AT_DOWN, &adapter->flags)) {
		dev_kfree_skb_any(skb);
		return NETDEV_TX_OK;
	}

	tpd_req = atl1c_cal_tpd_req(skb);
	if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
		if (netif_msg_pktdata(adapter))
			dev_info(&adapter->pdev->dev, "tx locked\n");
		return NETDEV_TX_LOCKED;
	}
	if (skb->mark == 0x01)
		type = atl1c_trans_high;
	else
		type = atl1c_trans_normal;

	if (atl1c_tpd_avail(adapter, type) < tpd_req) {
		/* no enough descriptor, just stop queue */
		netif_stop_queue(netdev);
		spin_unlock_irqrestore(&adapter->tx_lock, flags);
		return NETDEV_TX_BUSY;
	}

	tpd = atl1c_get_tpd(adapter, type);

	/* do TSO and check sum */
	if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
		spin_unlock_irqrestore(&adapter->tx_lock, flags);
		dev_kfree_skb_any(skb);
		return NETDEV_TX_OK;
	}

	if (unlikely(vlan_tx_tag_present(skb))) {
		u16 vlan = vlan_tx_tag_get(skb);
		__le16 tag;

		vlan = cpu_to_le16(vlan);
		AT_VLAN_TO_TAG(vlan, tag);
		tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
		tpd->vlan_tag = tag;
	}

	if (skb_network_offset(skb) != ETH_HLEN)
		tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */

	atl1c_tx_map(adapter, skb, tpd, type);
	atl1c_tx_queue(adapter, skb, tpd, type);

	spin_unlock_irqrestore(&adapter->tx_lock, flags);
	return NETDEV_TX_OK;
}

static void atl1c_free_irq(struct atl1c_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;

	free_irq(adapter->pdev->irq, netdev);

	if (adapter->have_msi)
		pci_disable_msi(adapter->pdev);
}

static int atl1c_request_irq(struct atl1c_adapter *adapter)
{
	struct pci_dev    *pdev   = adapter->pdev;
	struct net_device *netdev = adapter->netdev;
	int flags = 0;
	int err = 0;

	adapter->have_msi = true;
	err = pci_enable_msi(adapter->pdev);
	if (err) {
		if (netif_msg_ifup(adapter))
			dev_err(&pdev->dev,
				"Unable to allocate MSI interrupt Error: %d\n",
				err);
		adapter->have_msi = false;
	} else
		netdev->irq = pdev->irq;

	if (!adapter->have_msi)
		flags |= IRQF_SHARED;
	err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
			netdev->name, netdev);
	if (err) {
		if (netif_msg_ifup(adapter))
			dev_err(&pdev->dev,
				"Unable to allocate interrupt Error: %d\n",
				err);
		if (adapter->have_msi)
			pci_disable_msi(adapter->pdev);
		return err;
	}
	if (netif_msg_ifup(adapter))
		dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
	return err;
}

static int atl1c_up(struct atl1c_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	int num;
	int err;
	int i;

	netif_carrier_off(netdev);
	atl1c_init_ring_ptrs(adapter);
	atl1c_set_multi(netdev);
	atl1c_restore_vlan(adapter);

	for (i = 0; i < adapter->num_rx_queues; i++) {
		num = atl1c_alloc_rx_buffer(adapter, i);
		if (unlikely(num == 0)) {
			err = -ENOMEM;
			goto err_alloc_rx;
		}
	}

	if (atl1c_configure(adapter)) {
		err = -EIO;
		goto err_up;
	}

	err = atl1c_request_irq(adapter);
	if (unlikely(err))
		goto err_up;

	clear_bit(__AT_DOWN, &adapter->flags);
	napi_enable(&adapter->napi);
	atl1c_irq_enable(adapter);
	atl1c_check_link_status(adapter);
	netif_start_queue(netdev);
	return err;

err_up:
err_alloc_rx:
	atl1c_clean_rx_ring(adapter);
	return err;
}

static void atl1c_down(struct atl1c_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;

	atl1c_del_timer(adapter);
	adapter->work_event = 0; /* clear all event */
	/* signal that we're down so the interrupt handler does not
	 * reschedule our watchdog timer */
	set_bit(__AT_DOWN, &adapter->flags);
	netif_carrier_off(netdev);
	napi_disable(&adapter->napi);
	atl1c_irq_disable(adapter);
	atl1c_free_irq(adapter);
	/* reset MAC to disable all RX/TX */
	atl1c_reset_mac(&adapter->hw);
	msleep(1);

	adapter->link_speed = SPEED_0;
	adapter->link_duplex = -1;
	atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
	atl1c_clean_tx_ring(adapter, atl1c_trans_high);
	atl1c_clean_rx_ring(adapter);
}

/*
 * atl1c_open - Called when a network interface is made active
 * @netdev: network interface device structure
 *
 * Returns 0 on success, negative value on failure
 *
 * The open entry point is called when a network interface is made
 * active by the system (IFF_UP).  At this point all resources needed
 * for transmit and receive operations are allocated, the interrupt
 * handler is registered with the OS, the watchdog timer is started,
 * and the stack is notified that the interface is ready.
 */
static int atl1c_open(struct net_device *netdev)
{
	struct atl1c_adapter *adapter = netdev_priv(netdev);
	int err;

	/* disallow open during test */
	if (test_bit(__AT_TESTING, &adapter->flags))
		return -EBUSY;

	/* allocate rx/tx dma buffer & descriptors */
	err = atl1c_setup_ring_resources(adapter);
	if (unlikely(err))
		return err;

	err = atl1c_up(adapter);
	if (unlikely(err))
		goto err_up;

	if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
		u32 phy_data;

		AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
		phy_data |= MDIO_AP_EN;
		AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
	}
	return 0;

err_up:
	atl1c_free_irq(adapter);
	atl1c_free_ring_resources(adapter);
	atl1c_reset_mac(&adapter->hw);
	return err;
}

/*
 * atl1c_close - Disables a network interface
 * @netdev: network interface device structure
 *
 * Returns 0, this is not allowed to fail
 *
 * The close entry point is called when an interface is de-activated
 * by the OS.  The hardware is still under the drivers control, but
 * needs to be disabled.  A global MAC reset is issued to stop the
 * hardware, and all transmit and receive resources are freed.
 */
static int atl1c_close(struct net_device *netdev)
{
	struct atl1c_adapter *adapter = netdev_priv(netdev);

	WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
	atl1c_down(adapter);
	atl1c_free_ring_resources(adapter);
	return 0;
}

static int atl1c_suspend(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct atl1c_adapter *adapter = netdev_priv(netdev);
	struct atl1c_hw *hw = &adapter->hw;
	u32 mac_ctrl_data = 0;
	u32 master_ctrl_data = 0;
	u32 wol_ctrl_data = 0;
	u16 mii_intr_status_data = 0;
	u32 wufc = adapter->wol;

	atl1c_disable_l0s_l1(hw);
	if (netif_running(netdev)) {
		WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
		atl1c_down(adapter);
	}
	netif_device_detach(netdev);

	if (wufc)
		if (atl1c_phy_power_saving(hw) != 0)
			dev_dbg(&pdev->dev, "phy power saving failed");

	AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
	AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);

	master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
	mac_ctrl_data &= ~(MAC_CTRL_PRMLEN_MASK << MAC_CTRL_PRMLEN_SHIFT);
	mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
			MAC_CTRL_PRMLEN_MASK) <<
			MAC_CTRL_PRMLEN_SHIFT);
	mac_ctrl_data &= ~(MAC_CTRL_SPEED_MASK << MAC_CTRL_SPEED_SHIFT);
	mac_ctrl_data &= ~MAC_CTRL_DUPLX;

	if (wufc) {
		mac_ctrl_data |= MAC_CTRL_RX_EN;
		if (adapter->link_speed == SPEED_1000 ||
			adapter->link_speed == SPEED_0) {
			mac_ctrl_data |= atl1c_mac_speed_1000 <<
					MAC_CTRL_SPEED_SHIFT;
			mac_ctrl_data |= MAC_CTRL_DUPLX;
		} else
			mac_ctrl_data |= atl1c_mac_speed_10_100 <<
					MAC_CTRL_SPEED_SHIFT;

		if (adapter->link_duplex == DUPLEX_FULL)
			mac_ctrl_data |= MAC_CTRL_DUPLX;

		/* turn on magic packet wol */
		if (wufc & AT_WUFC_MAG)
			wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;

		if (wufc & AT_WUFC_LNKC) {
			wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
			/* only link up can wake up */
			if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
				dev_dbg(&pdev->dev, "%s: read write phy "
						  "register failed.\n",
						  atl1c_driver_name);
			}
		}
		/* clear phy interrupt */
		atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
		/* Config MAC Ctrl register */
		__atl1c_vlan_mode(netdev->features, &mac_ctrl_data);

		/* magic packet maybe Broadcast&multicast&Unicast frame */
		if (wufc & AT_WUFC_MAG)
			mac_ctrl_data |= MAC_CTRL_BC_EN;

		dev_dbg(&pdev->dev,
			"%s: suspend MAC=0x%x\n",
			atl1c_driver_name, mac_ctrl_data);
		AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
		AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
		AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);

		AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT |
			GPHY_CTRL_EXT_RESET);
	} else {
		AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_POWER_SAVING);
		master_ctrl_data |= MASTER_CTRL_CLK_SEL_DIS;
		mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
		mac_ctrl_data |= MAC_CTRL_DUPLX;
		AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
		AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
		AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
		hw->phy_configured = false; /* re-init PHY when resume */
	}

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int atl1c_resume(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct atl1c_adapter *adapter = netdev_priv(netdev);

	AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
	atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
			ATL1C_PCIE_PHY_RESET);

	atl1c_phy_reset(&adapter->hw);
	atl1c_reset_mac(&adapter->hw);
	atl1c_phy_init(&adapter->hw);

#if 0
	AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
	pm_data &= ~PM_CTRLSTAT_PME_EN;
	AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
#endif

	netif_device_attach(netdev);
	if (netif_running(netdev))
		atl1c_up(adapter);

	return 0;
}
#endif

static void atl1c_shutdown(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct atl1c_adapter *adapter = netdev_priv(netdev);

	atl1c_suspend(&pdev->dev);
	pci_wake_from_d3(pdev, adapter->wol);
	pci_set_power_state(pdev, PCI_D3hot);
}

static const struct net_device_ops atl1c_netdev_ops = {
	.ndo_open		= atl1c_open,
	.ndo_stop		= atl1c_close,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_start_xmit		= atl1c_xmit_frame,
	.ndo_set_mac_address	= atl1c_set_mac_addr,
	.ndo_set_multicast_list = atl1c_set_multi,
	.ndo_change_mtu		= atl1c_change_mtu,
	.ndo_fix_features	= atl1c_fix_features,
	.ndo_set_features	= atl1c_set_features,
	.ndo_do_ioctl		= atl1c_ioctl,
	.ndo_tx_timeout		= atl1c_tx_timeout,
	.ndo_get_stats		= atl1c_get_stats,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= atl1c_netpoll,
#endif
};

static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
{
	SET_NETDEV_DEV(netdev, &pdev->dev);
	pci_set_drvdata(pdev, netdev);

	netdev->irq  = pdev->irq;
	netdev->netdev_ops = &atl1c_netdev_ops;
	netdev->watchdog_timeo = AT_TX_WATCHDOG;
	atl1c_set_ethtool_ops(netdev);

	/* TODO: add when ready */
	netdev->hw_features =	NETIF_F_SG	   |
				NETIF_F_HW_CSUM	   |
				NETIF_F_HW_VLAN_RX |
				NETIF_F_TSO	   |
				NETIF_F_TSO6;
	netdev->features =	netdev->hw_features |
				NETIF_F_HW_VLAN_TX;
	return 0;
}

/*
 * atl1c_probe - Device Initialization Routine
 * @pdev: PCI device information struct
 * @ent: entry in atl1c_pci_tbl
 *
 * Returns 0 on success, negative on failure
 *
 * atl1c_probe initializes an adapter identified by a pci_dev structure.
 * The OS initialization, configuring of the adapter private structure,
 * and a hardware reset occur.
 */
static int __devinit atl1c_probe(struct pci_dev *pdev,
				 const struct pci_device_id *ent)
{
	struct net_device *netdev;
	struct atl1c_adapter *adapter;
	static int cards_found;

	int err = 0;

	/* enable device (incl. PCI PM wakeup and hotplug setup) */
	err = pci_enable_device_mem(pdev);
	if (err) {
		dev_err(&pdev->dev, "cannot enable PCI device\n");
		return err;
	}

	/*
	 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
	 * shared register for the high 32 bits, so only a single, aligned,
	 * 4 GB physical address range can be used at a time.
	 *
	 * Supporting 64-bit DMA on this hardware is more trouble than it's
	 * worth.  It is far easier to limit to 32-bit DMA than update
	 * various kernel subsystems to support the mechanics required by a
	 * fixed-high-32-bit system.
	 */
	if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
	    (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
		dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
		goto err_dma;
	}

	err = pci_request_regions(pdev, atl1c_driver_name);
	if (err) {
		dev_err(&pdev->dev, "cannot obtain PCI resources\n");
		goto err_pci_reg;
	}

	pci_set_master(pdev);

	netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
	if (netdev == NULL) {
		err = -ENOMEM;
		dev_err(&pdev->dev, "etherdev alloc failed\n");
		goto err_alloc_etherdev;
	}

	err = atl1c_init_netdev(netdev, pdev);
	if (err) {
		dev_err(&pdev->dev, "init netdevice failed\n");
		goto err_init_netdev;
	}
	adapter = netdev_priv(netdev);
	adapter->bd_number = cards_found;
	adapter->netdev = netdev;
	adapter->pdev = pdev;
	adapter->hw.adapter = adapter;
	adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
	adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
	if (!adapter->hw.hw_addr) {
		err = -EIO;
		dev_err(&pdev->dev, "cannot map device registers\n");
		goto err_ioremap;
	}
	netdev->base_addr = (unsigned long)adapter->hw.hw_addr;

	/* init mii data */
	adapter->mii.dev = netdev;
	adapter->mii.mdio_read  = atl1c_mdio_read;
	adapter->mii.mdio_write = atl1c_mdio_write;
	adapter->mii.phy_id_mask = 0x1f;
	adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
	netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
	setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
			(unsigned long)adapter);
	/* setup the private structure */
	err = atl1c_sw_init(adapter);
	if (err) {
		dev_err(&pdev->dev, "net device private data init failed\n");
		goto err_sw_init;
	}
	atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
			ATL1C_PCIE_PHY_RESET);

	/* Init GPHY as early as possible due to power saving issue  */
	atl1c_phy_reset(&adapter->hw);

	err = atl1c_reset_mac(&adapter->hw);
	if (err) {
		err = -EIO;
		goto err_reset;
	}

	/* reset the controller to
	 * put the device in a known good starting state */
	err = atl1c_phy_init(&adapter->hw);
	if (err) {
		err = -EIO;
		goto err_reset;
	}
	if (atl1c_read_mac_addr(&adapter->hw) != 0) {
		err = -EIO;
		dev_err(&pdev->dev, "get mac address failed\n");
		goto err_eeprom;
	}
	memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
	memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
	if (netif_msg_probe(adapter))
		dev_dbg(&pdev->dev, "mac address : %pM\n",
			adapter->hw.mac_addr);

	atl1c_hw_set_mac_addr(&adapter->hw);
	INIT_WORK(&adapter->common_task, atl1c_common_task);
	adapter->work_event = 0;
	err = register_netdev(netdev);
	if (err) {
		dev_err(&pdev->dev, "register netdevice failed\n");
		goto err_register;
	}

	if (netif_msg_probe(adapter))
		dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
	cards_found++;
	return 0;

err_reset:
err_register:
err_sw_init:
err_eeprom:
	iounmap(adapter->hw.hw_addr);
err_init_netdev:
err_ioremap:
	free_netdev(netdev);
err_alloc_etherdev:
	pci_release_regions(pdev);
err_pci_reg:
err_dma:
	pci_disable_device(pdev);
	return err;
}

/*
 * atl1c_remove - Device Removal Routine
 * @pdev: PCI device information struct
 *
 * atl1c_remove is called by the PCI subsystem to alert the driver
 * that it should release a PCI device.  The could be caused by a
 * Hot-Plug event, or because the driver is going to be removed from
 * memory.
 */
static void __devexit atl1c_remove(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct atl1c_adapter *adapter = netdev_priv(netdev);

	unregister_netdev(netdev);
	atl1c_phy_disable(&adapter->hw);

	iounmap(adapter->hw.hw_addr);

	pci_release_regions(pdev);
	pci_disable_device(pdev);
	free_netdev(netdev);
}

/*
 * atl1c_io_error_detected - called when PCI error is detected
 * @pdev: Pointer to PCI device
 * @state: The current pci connection state
 *
 * This function is called after a PCI bus error affecting
 * this device has been detected.
 */
static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
						pci_channel_state_t state)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct atl1c_adapter *adapter = netdev_priv(netdev);

	netif_device_detach(netdev);

	if (state == pci_channel_io_perm_failure)
		return PCI_ERS_RESULT_DISCONNECT;

	if (netif_running(netdev))
		atl1c_down(adapter);

	pci_disable_device(pdev);

	/* Request a slot slot reset. */
	return PCI_ERS_RESULT_NEED_RESET;
}

/*
 * atl1c_io_slot_reset - called after the pci bus has been reset.
 * @pdev: Pointer to PCI device
 *
 * Restart the card from scratch, as if from a cold-boot. Implementation
 * resembles the first-half of the e1000_resume routine.
 */
static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct atl1c_adapter *adapter = netdev_priv(netdev);

	if (pci_enable_device(pdev)) {
		if (netif_msg_hw(adapter))
			dev_err(&pdev->dev,
				"Cannot re-enable PCI device after reset\n");
		return PCI_ERS_RESULT_DISCONNECT;
	}
	pci_set_master(pdev);

	pci_enable_wake(pdev, PCI_D3hot, 0);
	pci_enable_wake(pdev, PCI_D3cold, 0);

	atl1c_reset_mac(&adapter->hw);

	return PCI_ERS_RESULT_RECOVERED;
}

/*
 * atl1c_io_resume - called when traffic can start flowing again.
 * @pdev: Pointer to PCI device
 *
 * This callback is called when the error recovery driver tells us that
 * its OK to resume normal operation. Implementation resembles the
 * second-half of the atl1c_resume routine.
 */
static void atl1c_io_resume(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct atl1c_adapter *adapter = netdev_priv(netdev);

	if (netif_running(netdev)) {
		if (atl1c_up(adapter)) {
			if (netif_msg_hw(adapter))
				dev_err(&pdev->dev,
					"Cannot bring device back up after reset\n");
			return;
		}
	}

	netif_device_attach(netdev);
}

static struct pci_error_handlers atl1c_err_handler = {
	.error_detected = atl1c_io_error_detected,
	.slot_reset = atl1c_io_slot_reset,
	.resume = atl1c_io_resume,
};

static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);

static struct pci_driver atl1c_driver = {
	.name     = atl1c_driver_name,
	.id_table = atl1c_pci_tbl,
	.probe    = atl1c_probe,
	.remove   = __devexit_p(atl1c_remove),
	.shutdown = atl1c_shutdown,
	.err_handler = &atl1c_err_handler,
	.driver.pm = &atl1c_pm_ops,
};

/*
 * atl1c_init_module - Driver Registration Routine
 *
 * atl1c_init_module is the first routine called when the driver is
 * loaded. All it does is register with the PCI subsystem.
 */
static int __init atl1c_init_module(void)
{
	return pci_register_driver(&atl1c_driver);
}

/*
 * atl1c_exit_module - Driver Exit Cleanup Routine
 *
 * atl1c_exit_module is called just before the driver is removed
 * from memory.
 */
static void __exit atl1c_exit_module(void)
{
	pci_unregister_driver(&atl1c_driver);
}

module_init(atl1c_init_module);
module_exit(atl1c_exit_module);