#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/list.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/pagemap.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/dmapool.h>
#include <linux/mempool.h>
#include <linux/spinlock.h>
#include <linux/kthread.h>
#include <linux/interrupt.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <net/ipv6.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/if_arp.h>
#include <linux/if_ether.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/skbuff.h>
#include <linux/rtnetlink.h>
#include <linux/if_vlan.h>
#include <linux/delay.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>


#include "qlge.h"

static int ql_update_ring_coalescing(struct ql_adapter *qdev)
{
	int i, status = 0;
	struct rx_ring *rx_ring;
	struct cqicb *cqicb;

	if (!netif_running(qdev->ndev))
		return status;

	spin_lock(&qdev->hw_lock);
	/* Skip the default queue, and update the outbound handler
	 * queues if they changed.
	 */
	cqicb = (struct cqicb *)&qdev->rx_ring[1];
	if (le16_to_cpu(cqicb->irq_delay) != qdev->tx_coalesce_usecs ||
	    le16_to_cpu(cqicb->pkt_delay) != qdev->tx_max_coalesced_frames) {
		for (i = 1; i < qdev->rss_ring_first_cq_id; i++, rx_ring++) {
			rx_ring = &qdev->rx_ring[i];
			cqicb = (struct cqicb *)rx_ring;
			cqicb->irq_delay = cpu_to_le16(qdev->tx_coalesce_usecs);
			cqicb->pkt_delay =
			    cpu_to_le16(qdev->tx_max_coalesced_frames);
			cqicb->flags = FLAGS_LI;
			status = ql_write_cfg(qdev, cqicb, sizeof(cqicb),
						CFG_LCQ, rx_ring->cq_id);
			if (status) {
				QPRINTK(qdev, IFUP, ERR,
					"Failed to load CQICB.\n");
				goto exit;
			}
		}
	}

	/* Update the inbound (RSS) handler queues if they changed. */
	cqicb = (struct cqicb *)&qdev->rx_ring[qdev->rss_ring_first_cq_id];
	if (le16_to_cpu(cqicb->irq_delay) != qdev->rx_coalesce_usecs ||
	    le16_to_cpu(cqicb->pkt_delay) != qdev->rx_max_coalesced_frames) {
		for (i = qdev->rss_ring_first_cq_id;
		     i <= qdev->rss_ring_first_cq_id + qdev->rss_ring_count;
		     i++) {
			rx_ring = &qdev->rx_ring[i];
			cqicb = (struct cqicb *)rx_ring;
			cqicb->irq_delay = cpu_to_le16(qdev->rx_coalesce_usecs);
			cqicb->pkt_delay =
			    cpu_to_le16(qdev->rx_max_coalesced_frames);
			cqicb->flags = FLAGS_LI;
			status = ql_write_cfg(qdev, cqicb, sizeof(cqicb),
						CFG_LCQ, rx_ring->cq_id);
			if (status) {
				QPRINTK(qdev, IFUP, ERR,
					"Failed to load CQICB.\n");
				goto exit;
			}
		}
	}
exit:
	spin_unlock(&qdev->hw_lock);
	return status;
}

static void ql_update_stats(struct ql_adapter *qdev)
{
	u32 i;
	u64 data;
	u64 *iter = &qdev->nic_stats.tx_pkts;

	spin_lock(&qdev->stats_lock);
	if (ql_sem_spinlock(qdev, qdev->xg_sem_mask)) {
			QPRINTK(qdev, DRV, ERR,
				"Couldn't get xgmac sem.\n");
		goto quit;
	}
	/*
	 * Get TX statistics.
	 */
	for (i = 0x200; i < 0x280; i += 8) {
		if (ql_read_xgmac_reg64(qdev, i, &data)) {
			QPRINTK(qdev, DRV, ERR,
				"Error reading status register 0x%.04x.\n", i);
			goto end;
		} else
			*iter = data;
		iter++;
	}

	/*
	 * Get RX statistics.
	 */
	for (i = 0x300; i < 0x3d0; i += 8) {
		if (ql_read_xgmac_reg64(qdev, i, &data)) {
			QPRINTK(qdev, DRV, ERR,
				"Error reading status register 0x%.04x.\n", i);
			goto end;
		} else
			*iter = data;
		iter++;
	}

end:
	ql_sem_unlock(qdev, qdev->xg_sem_mask);
quit:
	spin_unlock(&qdev->stats_lock);

	QL_DUMP_STAT(qdev);

	return;
}

static char ql_stats_str_arr[][ETH_GSTRING_LEN] = {
	{"tx_pkts"},
	{"tx_bytes"},
	{"tx_mcast_pkts"},
	{"tx_bcast_pkts"},
	{"tx_ucast_pkts"},
	{"tx_ctl_pkts"},
	{"tx_pause_pkts"},
	{"tx_64_pkts"},
	{"tx_65_to_127_pkts"},
	{"tx_128_to_255_pkts"},
	{"tx_256_511_pkts"},
	{"tx_512_to_1023_pkts"},
	{"tx_1024_to_1518_pkts"},
	{"tx_1519_to_max_pkts"},
	{"tx_undersize_pkts"},
	{"tx_oversize_pkts"},
	{"rx_bytes"},
	{"rx_bytes_ok"},
	{"rx_pkts"},
	{"rx_pkts_ok"},
	{"rx_bcast_pkts"},
	{"rx_mcast_pkts"},
	{"rx_ucast_pkts"},
	{"rx_undersize_pkts"},
	{"rx_oversize_pkts"},
	{"rx_jabber_pkts"},
	{"rx_undersize_fcerr_pkts"},
	{"rx_drop_events"},
	{"rx_fcerr_pkts"},
	{"rx_align_err"},
	{"rx_symbol_err"},
	{"rx_mac_err"},
	{"rx_ctl_pkts"},
	{"rx_pause_pkts"},
	{"rx_64_pkts"},
	{"rx_65_to_127_pkts"},
	{"rx_128_255_pkts"},
	{"rx_256_511_pkts"},
	{"rx_512_to_1023_pkts"},
	{"rx_1024_to_1518_pkts"},
	{"rx_1519_to_max_pkts"},
	{"rx_len_err_pkts"},
};

static void ql_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
{
	switch (stringset) {
	case ETH_SS_STATS:
		memcpy(buf, ql_stats_str_arr, sizeof(ql_stats_str_arr));
		break;
	}
}

static int ql_get_sset_count(struct net_device *dev, int sset)
{
	switch (sset) {
	case ETH_SS_STATS:
		return ARRAY_SIZE(ql_stats_str_arr);
	default:
		return -EOPNOTSUPP;
	}
}

static void
ql_get_ethtool_stats(struct net_device *ndev,
		     struct ethtool_stats *stats, u64 *data)
{
	struct ql_adapter *qdev = netdev_priv(ndev);
	struct nic_stats *s = &qdev->nic_stats;

	ql_update_stats(qdev);

	*data++ = s->tx_pkts;
	*data++ = s->tx_bytes;
	*data++ = s->tx_mcast_pkts;
	*data++ = s->tx_bcast_pkts;
	*data++ = s->tx_ucast_pkts;
	*data++ = s->tx_ctl_pkts;
	*data++ = s->tx_pause_pkts;
	*data++ = s->tx_64_pkt;
	*data++ = s->tx_65_to_127_pkt;
	*data++ = s->tx_128_to_255_pkt;
	*data++ = s->tx_256_511_pkt;
	*data++ = s->tx_512_to_1023_pkt;
	*data++ = s->tx_1024_to_1518_pkt;
	*data++ = s->tx_1519_to_max_pkt;
	*data++ = s->tx_undersize_pkt;
	*data++ = s->tx_oversize_pkt;
	*data++ = s->rx_bytes;
	*data++ = s->rx_bytes_ok;
	*data++ = s->rx_pkts;
	*data++ = s->rx_pkts_ok;
	*data++ = s->rx_bcast_pkts;
	*data++ = s->rx_mcast_pkts;
	*data++ = s->rx_ucast_pkts;
	*data++ = s->rx_undersize_pkts;
	*data++ = s->rx_oversize_pkts;
	*data++ = s->rx_jabber_pkts;
	*data++ = s->rx_undersize_fcerr_pkts;
	*data++ = s->rx_drop_events;
	*data++ = s->rx_fcerr_pkts;
	*data++ = s->rx_align_err;
	*data++ = s->rx_symbol_err;
	*data++ = s->rx_mac_err;
	*data++ = s->rx_ctl_pkts;
	*data++ = s->rx_pause_pkts;
	*data++ = s->rx_64_pkts;
	*data++ = s->rx_65_to_127_pkts;
	*data++ = s->rx_128_255_pkts;
	*data++ = s->rx_256_511_pkts;
	*data++ = s->rx_512_to_1023_pkts;
	*data++ = s->rx_1024_to_1518_pkts;
	*data++ = s->rx_1519_to_max_pkts;
	*data++ = s->rx_len_err_pkts;
}

static int ql_get_settings(struct net_device *ndev,
			      struct ethtool_cmd *ecmd)
{
	struct ql_adapter *qdev = netdev_priv(ndev);

	ecmd->supported = SUPPORTED_10000baseT_Full;
	ecmd->advertising = ADVERTISED_10000baseT_Full;
	ecmd->autoneg = AUTONEG_ENABLE;
	ecmd->transceiver = XCVR_EXTERNAL;
	if ((qdev->link_status & STS_LINK_TYPE_MASK) ==
				STS_LINK_TYPE_10GBASET) {
		ecmd->supported |= (SUPPORTED_TP | SUPPORTED_Autoneg);
		ecmd->advertising |= (ADVERTISED_TP | ADVERTISED_Autoneg);
		ecmd->port = PORT_TP;
	} else {
		ecmd->supported |= SUPPORTED_FIBRE;
		ecmd->advertising |= ADVERTISED_FIBRE;
		ecmd->port = PORT_FIBRE;
	}

	ecmd->speed = SPEED_10000;
	ecmd->duplex = DUPLEX_FULL;

	return 0;
}

static void ql_get_drvinfo(struct net_device *ndev,
			   struct ethtool_drvinfo *drvinfo)
{
	struct ql_adapter *qdev = netdev_priv(ndev);
	strncpy(drvinfo->driver, qlge_driver_name, 32);
	strncpy(drvinfo->version, qlge_driver_version, 32);
	strncpy(drvinfo->fw_version, "N/A", 32);
	strncpy(drvinfo->bus_info, pci_name(qdev->pdev), 32);
	drvinfo->n_stats = 0;
	drvinfo->testinfo_len = 0;
	drvinfo->regdump_len = 0;
	drvinfo->eedump_len = 0;
}

static int ql_get_coalesce(struct net_device *dev, struct ethtool_coalesce *c)
{
	struct ql_adapter *qdev = netdev_priv(dev);

	c->rx_coalesce_usecs = qdev->rx_coalesce_usecs;
	c->tx_coalesce_usecs = qdev->tx_coalesce_usecs;

	/* This chip coalesces as follows:
	 * If a packet arrives, hold off interrupts until
	 * cqicb->int_delay expires, but if no other packets arrive don't
	 * wait longer than cqicb->pkt_int_delay. But ethtool doesn't use a
	 * timer to coalesce on a frame basis.  So, we have to take ethtool's
	 * max_coalesced_frames value and convert it to a delay in microseconds.
	 * We do this by using a basic thoughput of 1,000,000 frames per
	 * second @ (1024 bytes).  This means one frame per usec. So it's a
	 * simple one to one ratio.
	 */
	c->rx_max_coalesced_frames = qdev->rx_max_coalesced_frames;
	c->tx_max_coalesced_frames = qdev->tx_max_coalesced_frames;

	return 0;
}

static int ql_set_coalesce(struct net_device *ndev, struct ethtool_coalesce *c)
{
	struct ql_adapter *qdev = netdev_priv(ndev);

	/* Validate user parameters. */
	if (c->rx_coalesce_usecs > qdev->rx_ring_size / 2)
		return -EINVAL;
       /* Don't wait more than 10 usec. */
	if (c->rx_max_coalesced_frames > MAX_INTER_FRAME_WAIT)
		return -EINVAL;
	if (c->tx_coalesce_usecs > qdev->tx_ring_size / 2)
		return -EINVAL;
	if (c->tx_max_coalesced_frames > MAX_INTER_FRAME_WAIT)
		return -EINVAL;

	/* Verify a change took place before updating the hardware. */
	if (qdev->rx_coalesce_usecs == c->rx_coalesce_usecs &&
	    qdev->tx_coalesce_usecs == c->tx_coalesce_usecs &&
	    qdev->rx_max_coalesced_frames == c->rx_max_coalesced_frames &&
	    qdev->tx_max_coalesced_frames == c->tx_max_coalesced_frames)
		return 0;

	qdev->rx_coalesce_usecs = c->rx_coalesce_usecs;
	qdev->tx_coalesce_usecs = c->tx_coalesce_usecs;
	qdev->rx_max_coalesced_frames = c->rx_max_coalesced_frames;
	qdev->tx_max_coalesced_frames = c->tx_max_coalesced_frames;

	return ql_update_ring_coalescing(qdev);
}

static u32 ql_get_rx_csum(struct net_device *netdev)
{
	struct ql_adapter *qdev = netdev_priv(netdev);
	return qdev->rx_csum;
}

static int ql_set_rx_csum(struct net_device *netdev, uint32_t data)
{
	struct ql_adapter *qdev = netdev_priv(netdev);
	qdev->rx_csum = data;
	return 0;
}

static int ql_set_tso(struct net_device *ndev, uint32_t data)
{

	if (data) {
		ndev->features |= NETIF_F_TSO;
		ndev->features |= NETIF_F_TSO6;
	} else {
		ndev->features &= ~NETIF_F_TSO;
		ndev->features &= ~NETIF_F_TSO6;
	}
	return 0;
}

static u32 ql_get_msglevel(struct net_device *ndev)
{
	struct ql_adapter *qdev = netdev_priv(ndev);
	return qdev->msg_enable;
}

static void ql_set_msglevel(struct net_device *ndev, u32 value)
{
	struct ql_adapter *qdev = netdev_priv(ndev);
	qdev->msg_enable = value;
}

const struct ethtool_ops qlge_ethtool_ops = {
	.get_settings = ql_get_settings,
	.get_drvinfo = ql_get_drvinfo,
	.get_msglevel = ql_get_msglevel,
	.set_msglevel = ql_set_msglevel,
	.get_link = ethtool_op_get_link,
	.get_rx_csum = ql_get_rx_csum,
	.set_rx_csum = ql_set_rx_csum,
	.get_tx_csum = ethtool_op_get_tx_csum,
	.get_sg = ethtool_op_get_sg,
	.set_sg = ethtool_op_set_sg,
	.get_tso = ethtool_op_get_tso,
	.set_tso = ql_set_tso,
	.get_coalesce = ql_get_coalesce,
	.set_coalesce = ql_set_coalesce,
	.get_sset_count = ql_get_sset_count,
	.get_strings = ql_get_strings,
	.get_ethtool_stats = ql_get_ethtool_stats,
};