// SPDX-License-Identifier: GPL-2.0
/*******************************************************************************

  Intel(R) Gigabit Ethernet Linux driver
  Copyright(c) 2007-2013 Intel Corporation.

  Contact Information:
  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

*******************************************************************************/


#include <linux/tcp.h>

#include "igb.h"
#include "igb_vmdq.h"
#include <linux/if_vlan.h>

#ifdef CONFIG_IGB_VMDQ_NETDEV
int igb_vmdq_open(struct net_device *dev)
{
	struct igb_vmdq_adapter *vadapter = netdev_priv(dev);
	struct igb_adapter *adapter = vadapter->real_adapter;
	struct net_device *main_netdev = adapter->netdev;
	int hw_queue = vadapter->rx_ring->queue_index +
		       adapter->vfs_allocated_count;

	if (test_bit(__IGB_DOWN, &adapter->state)) {
		DPRINTK(DRV, WARNING,
			"Open %s before opening this device.\n",
			main_netdev->name);
		return -EAGAIN;
	}
	netif_carrier_off(dev);
	vadapter->tx_ring->vmdq_netdev = dev;
	vadapter->rx_ring->vmdq_netdev = dev;
	if (is_valid_ether_addr(dev->dev_addr)) {
		igb_del_mac_filter(adapter, dev->dev_addr, hw_queue);
		igb_add_mac_filter(adapter, dev->dev_addr, hw_queue);
	}
	netif_carrier_on(dev);
	return 0;
}

int igb_vmdq_close(struct net_device *dev)
{
	struct igb_vmdq_adapter *vadapter = netdev_priv(dev);
	struct igb_adapter *adapter = vadapter->real_adapter;
	int hw_queue = vadapter->rx_ring->queue_index +
		       adapter->vfs_allocated_count;

	netif_carrier_off(dev);
	igb_del_mac_filter(adapter, dev->dev_addr, hw_queue);

	vadapter->tx_ring->vmdq_netdev = NULL;
	vadapter->rx_ring->vmdq_netdev = NULL;
	return 0;
}

netdev_tx_t igb_vmdq_xmit_frame(struct sk_buff *skb, struct net_device *dev)
{
	struct igb_vmdq_adapter *vadapter = netdev_priv(dev);

	return igb_xmit_frame_ring(skb, vadapter->tx_ring);
}

struct net_device_stats *igb_vmdq_get_stats(struct net_device *dev)
{
	struct igb_vmdq_adapter *vadapter = netdev_priv(dev);
        struct igb_adapter *adapter = vadapter->real_adapter;
        struct e1000_hw *hw = &adapter->hw;
	int hw_queue = vadapter->rx_ring->queue_index +
		       adapter->vfs_allocated_count;

	vadapter->net_stats.rx_packets +=
			E1000_READ_REG(hw, E1000_PFVFGPRC(hw_queue));
	E1000_WRITE_REG(hw, E1000_PFVFGPRC(hw_queue), 0);
        vadapter->net_stats.tx_packets +=
			E1000_READ_REG(hw, E1000_PFVFGPTC(hw_queue));
        E1000_WRITE_REG(hw, E1000_PFVFGPTC(hw_queue), 0);
        vadapter->net_stats.rx_bytes +=
			E1000_READ_REG(hw, E1000_PFVFGORC(hw_queue));
        E1000_WRITE_REG(hw, E1000_PFVFGORC(hw_queue), 0);
        vadapter->net_stats.tx_bytes +=
			E1000_READ_REG(hw, E1000_PFVFGOTC(hw_queue));
        E1000_WRITE_REG(hw, E1000_PFVFGOTC(hw_queue), 0);
        vadapter->net_stats.multicast +=
			E1000_READ_REG(hw, E1000_PFVFMPRC(hw_queue));
        E1000_WRITE_REG(hw, E1000_PFVFMPRC(hw_queue), 0);
	/* only return the current stats */
	return &vadapter->net_stats;
}

/**
 * igb_write_vm_addr_list - write unicast addresses to RAR table
 * @netdev: network interface device structure
 *
 * Writes unicast address list to the RAR table.
 * Returns: -ENOMEM on failure/insufficient address space
 *                0 on no addresses written
 *                X on writing X addresses to the RAR table
 **/
static int igb_write_vm_addr_list(struct net_device *netdev)
{
	struct igb_vmdq_adapter *vadapter = netdev_priv(netdev);
        struct igb_adapter *adapter = vadapter->real_adapter;
	int count = 0;
	int hw_queue = vadapter->rx_ring->queue_index +
		       adapter->vfs_allocated_count;

	/* return ENOMEM indicating insufficient memory for addresses */
	if (netdev_uc_count(netdev) > igb_available_rars(adapter))
		return -ENOMEM;

	if (!netdev_uc_empty(netdev)) {
#ifdef NETDEV_HW_ADDR_T_UNICAST
		struct netdev_hw_addr *ha;
#else
		struct dev_mc_list *ha;
#endif
		netdev_for_each_uc_addr(ha, netdev) {
#ifdef NETDEV_HW_ADDR_T_UNICAST
			igb_del_mac_filter(adapter, ha->addr, hw_queue);
			igb_add_mac_filter(adapter, ha->addr, hw_queue);
#else
			igb_del_mac_filter(adapter, ha->da_addr, hw_queue);
			igb_add_mac_filter(adapter, ha->da_addr, hw_queue);
#endif
			count++;
		}
	}
	return count;
}


#define E1000_VMOLR_UPE		0x20000000 /* Unicast promiscuous mode */
void igb_vmdq_set_rx_mode(struct net_device *dev)
{
	struct igb_vmdq_adapter *vadapter = netdev_priv(dev);
        struct igb_adapter *adapter = vadapter->real_adapter;
        struct e1000_hw *hw = &adapter->hw;
	u32 vmolr, rctl;
	int hw_queue = vadapter->rx_ring->queue_index +
		       adapter->vfs_allocated_count;

	/* Check for Promiscuous and All Multicast modes */
	vmolr = E1000_READ_REG(hw, E1000_VMOLR(hw_queue));

	/* clear the affected bits */
	vmolr &= ~(E1000_VMOLR_UPE | E1000_VMOLR_MPME |
		   E1000_VMOLR_ROPE | E1000_VMOLR_ROMPE);

	if (dev->flags & IFF_PROMISC) {
		vmolr |= E1000_VMOLR_UPE;
		rctl = E1000_READ_REG(hw, E1000_RCTL);
		rctl |= E1000_RCTL_UPE;
		E1000_WRITE_REG(hw, E1000_RCTL, rctl);
	} else {
		rctl = E1000_READ_REG(hw, E1000_RCTL);
		rctl &= ~E1000_RCTL_UPE;
		E1000_WRITE_REG(hw, E1000_RCTL, rctl);
		if (dev->flags & IFF_ALLMULTI) {
			vmolr |= E1000_VMOLR_MPME;
		} else {
			/*
			 * Write addresses to the MTA, if the attempt fails
			 * then we should just turn on promiscuous mode so
			 * that we can at least receive multicast traffic
			 */
			if (igb_write_mc_addr_list(adapter->netdev) != 0)
				vmolr |= E1000_VMOLR_ROMPE;
		}
#ifdef HAVE_SET_RX_MODE
		/*
		 * Write addresses to available RAR registers, if there is not
		 * sufficient space to store all the addresses then enable
		 * unicast promiscuous mode
		 */
		if (igb_write_vm_addr_list(dev) < 0)
			vmolr |= E1000_VMOLR_UPE;
#endif
	}
	E1000_WRITE_REG(hw, E1000_VMOLR(hw_queue), vmolr);

	return;
}

int igb_vmdq_set_mac(struct net_device *dev, void *p)
{
	struct sockaddr *addr = p;
	struct igb_vmdq_adapter *vadapter = netdev_priv(dev);
        struct igb_adapter *adapter = vadapter->real_adapter;
	int hw_queue = vadapter->rx_ring->queue_index +
		       adapter->vfs_allocated_count;

	igb_del_mac_filter(adapter, dev->dev_addr, hw_queue);
	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
	return igb_add_mac_filter(adapter, dev->dev_addr, hw_queue);
}

int igb_vmdq_change_mtu(struct net_device *dev, int new_mtu)
{
	struct igb_vmdq_adapter *vadapter = netdev_priv(dev);
	struct igb_adapter *adapter = vadapter->real_adapter;

	if (adapter->netdev->mtu < new_mtu) {
		DPRINTK(PROBE, INFO,
			"Set MTU on %s to >= %d "
			"before changing MTU on %s\n",
			adapter->netdev->name, new_mtu, dev->name);
		return -EINVAL;
	}
	dev->mtu = new_mtu;
	return 0;
}

void igb_vmdq_tx_timeout(struct net_device *dev)
{
	return;
}

void igb_vmdq_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
{
	struct igb_vmdq_adapter *vadapter = netdev_priv(dev);
	struct igb_adapter *adapter = vadapter->real_adapter;
	struct e1000_hw *hw = &adapter->hw;
	int hw_queue = vadapter->rx_ring->queue_index +
		       adapter->vfs_allocated_count;

	vadapter->vlgrp = grp;

	igb_enable_vlan_tags(adapter);
	E1000_WRITE_REG(hw, E1000_VMVIR(hw_queue), 0);

	return;
}
void igb_vmdq_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
{
	struct igb_vmdq_adapter *vadapter = netdev_priv(dev);
	struct igb_adapter *adapter = vadapter->real_adapter;
#ifndef HAVE_NETDEV_VLAN_FEATURES
	struct net_device *v_netdev;
#endif
	int hw_queue = vadapter->rx_ring->queue_index +
		       adapter->vfs_allocated_count;

	/* attempt to add filter to vlvf array */
	igb_vlvf_set(adapter, vid, TRUE, hw_queue);

#ifndef HAVE_NETDEV_VLAN_FEATURES

	/* Copy feature flags from netdev to the vlan netdev for this vid.
	 * This allows things like TSO to bubble down to our vlan device.
	 */
	v_netdev = vlan_group_get_device(vadapter->vlgrp, vid);
	v_netdev->features |= adapter->netdev->features;
	vlan_group_set_device(vadapter->vlgrp, vid, v_netdev);
#endif

	return;
}
void igb_vmdq_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
{
	struct igb_vmdq_adapter *vadapter = netdev_priv(dev);
	struct igb_adapter *adapter = vadapter->real_adapter;
	int hw_queue = vadapter->rx_ring->queue_index +
		       adapter->vfs_allocated_count;

	vlan_group_set_device(vadapter->vlgrp, vid, NULL);
	/* remove vlan from VLVF table array */
	igb_vlvf_set(adapter, vid, FALSE, hw_queue);


	return;
}

static int igb_vmdq_get_settings(struct net_device *netdev,
				   struct ethtool_cmd *ecmd)
{
	struct igb_vmdq_adapter *vadapter = netdev_priv(netdev);
	struct igb_adapter *adapter = vadapter->real_adapter;
	struct e1000_hw *hw = &adapter->hw;
	u32 status;

	if (hw->phy.media_type == e1000_media_type_copper) {

		ecmd->supported = (SUPPORTED_10baseT_Half |
				   SUPPORTED_10baseT_Full |
				   SUPPORTED_100baseT_Half |
				   SUPPORTED_100baseT_Full |
				   SUPPORTED_1000baseT_Full|
				   SUPPORTED_Autoneg |
				   SUPPORTED_TP);
		ecmd->advertising = ADVERTISED_TP;

		if (hw->mac.autoneg == 1) {
			ecmd->advertising |= ADVERTISED_Autoneg;
			/* the e1000 autoneg seems to match ethtool nicely */
			ecmd->advertising |= hw->phy.autoneg_advertised;
		}

		ecmd->port = PORT_TP;
		ecmd->phy_address = hw->phy.addr;
	} else {
		ecmd->supported   = (SUPPORTED_1000baseT_Full |
				     SUPPORTED_FIBRE |
				     SUPPORTED_Autoneg);

		ecmd->advertising = (ADVERTISED_1000baseT_Full |
				     ADVERTISED_FIBRE |
				     ADVERTISED_Autoneg);

		ecmd->port = PORT_FIBRE;
	}

	ecmd->transceiver = XCVR_INTERNAL;

	status = E1000_READ_REG(hw, E1000_STATUS);

	if (status & E1000_STATUS_LU) {

		if ((status & E1000_STATUS_SPEED_1000) ||
		    hw->phy.media_type != e1000_media_type_copper)
			ecmd->speed = SPEED_1000;
		else if (status & E1000_STATUS_SPEED_100)
			ecmd->speed = SPEED_100;
		else
			ecmd->speed = SPEED_10;

		if ((status & E1000_STATUS_FD) ||
		    hw->phy.media_type != e1000_media_type_copper)
			ecmd->duplex = DUPLEX_FULL;
		else
			ecmd->duplex = DUPLEX_HALF;
	} else {
		ecmd->speed = -1;
		ecmd->duplex = -1;
	}

	ecmd->autoneg = hw->mac.autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
	return 0;
}


static u32 igb_vmdq_get_msglevel(struct net_device *netdev)
{
	struct igb_vmdq_adapter *vadapter = netdev_priv(netdev);
	struct igb_adapter *adapter = vadapter->real_adapter;
	return adapter->msg_enable;
}

static void igb_vmdq_get_drvinfo(struct net_device *netdev,
				   struct ethtool_drvinfo *drvinfo)
{
	struct igb_vmdq_adapter *vadapter = netdev_priv(netdev);
	struct igb_adapter *adapter = vadapter->real_adapter;
	struct net_device *main_netdev = adapter->netdev;

	strncpy(drvinfo->driver, igb_driver_name, 32);
	strncpy(drvinfo->version, igb_driver_version, 32);

	strncpy(drvinfo->fw_version, "N/A", 4);
	snprintf(drvinfo->bus_info, 32, "%s VMDQ %d", main_netdev->name,
		 vadapter->rx_ring->queue_index);
	drvinfo->n_stats = 0;
	drvinfo->testinfo_len = 0;
	drvinfo->regdump_len = 0;
}

static void igb_vmdq_get_ringparam(struct net_device *netdev,
				     struct ethtool_ringparam *ring)
{
	struct igb_vmdq_adapter *vadapter = netdev_priv(netdev);

	struct igb_ring *tx_ring = vadapter->tx_ring;
	struct igb_ring *rx_ring = vadapter->rx_ring;

	ring->rx_max_pending = IGB_MAX_RXD;
	ring->tx_max_pending = IGB_MAX_TXD;
	ring->rx_mini_max_pending = 0;
	ring->rx_jumbo_max_pending = 0;
	ring->rx_pending = rx_ring->count;
	ring->tx_pending = tx_ring->count;
	ring->rx_mini_pending = 0;
	ring->rx_jumbo_pending = 0;
}
static u32 igb_vmdq_get_rx_csum(struct net_device *netdev)
{
	struct igb_vmdq_adapter *vadapter = netdev_priv(netdev);
	struct igb_adapter *adapter = vadapter->real_adapter;

	return test_bit(IGB_RING_FLAG_RX_CSUM, &adapter->rx_ring[0]->flags);
}


static struct ethtool_ops igb_vmdq_ethtool_ops = {
	.get_settings           = igb_vmdq_get_settings,
	.get_drvinfo            = igb_vmdq_get_drvinfo,
	.get_link               = ethtool_op_get_link,
	.get_ringparam          = igb_vmdq_get_ringparam,
	.get_rx_csum            = igb_vmdq_get_rx_csum,
	.get_tx_csum            = ethtool_op_get_tx_csum,
	.get_sg                 = ethtool_op_get_sg,
	.set_sg                 = ethtool_op_set_sg,
	.get_msglevel           = igb_vmdq_get_msglevel,
#ifdef NETIF_F_TSO
	.get_tso                = ethtool_op_get_tso,
#endif
#ifdef HAVE_ETHTOOL_GET_PERM_ADDR
	.get_perm_addr          = ethtool_op_get_perm_addr,
#endif
};

void igb_vmdq_set_ethtool_ops(struct net_device *netdev)
{
	SET_ETHTOOL_OPS(netdev, &igb_vmdq_ethtool_ops);
}


#endif /* CONFIG_IGB_VMDQ_NETDEV */