enic_main.c 59.5 KB
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/*
 * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 *
 * This program is free software; you may redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/workqueue.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
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#include <linux/if_link.h>
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#include <linux/ethtool.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/tcp.h>
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#include <net/ip6_checksum.h>
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#include "cq_enet_desc.h"
#include "vnic_dev.h"
#include "vnic_intr.h"
#include "vnic_stats.h"
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#include "vnic_vic.h"
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#include "enic_res.h"
#include "enic.h"

#define ENIC_NOTIFY_TIMER_PERIOD	(2 * HZ)
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#define WQ_ENET_MAX_DESC_LEN		(1 << WQ_ENET_LEN_BITS)
#define MAX_TSO				(1 << 16)
#define ENIC_DESC_MAX_SPLITS		(MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)

#define PCI_DEVICE_ID_CISCO_VIC_ENET         0x0043  /* ethernet vnic */
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#define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN     0x0044  /* enet dynamic vnic */
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/* Supported devices */
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static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
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	{ PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
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	{ PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
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	{ 0, }	/* end of table */
};

MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
MODULE_DEVICE_TABLE(pci, enic_id_table);

struct enic_stat {
	char name[ETH_GSTRING_LEN];
	unsigned int offset;
};

#define ENIC_TX_STAT(stat)	\
	{ .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
#define ENIC_RX_STAT(stat)	\
	{ .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }

static const struct enic_stat enic_tx_stats[] = {
	ENIC_TX_STAT(tx_frames_ok),
	ENIC_TX_STAT(tx_unicast_frames_ok),
	ENIC_TX_STAT(tx_multicast_frames_ok),
	ENIC_TX_STAT(tx_broadcast_frames_ok),
	ENIC_TX_STAT(tx_bytes_ok),
	ENIC_TX_STAT(tx_unicast_bytes_ok),
	ENIC_TX_STAT(tx_multicast_bytes_ok),
	ENIC_TX_STAT(tx_broadcast_bytes_ok),
	ENIC_TX_STAT(tx_drops),
	ENIC_TX_STAT(tx_errors),
	ENIC_TX_STAT(tx_tso),
};

static const struct enic_stat enic_rx_stats[] = {
	ENIC_RX_STAT(rx_frames_ok),
	ENIC_RX_STAT(rx_frames_total),
	ENIC_RX_STAT(rx_unicast_frames_ok),
	ENIC_RX_STAT(rx_multicast_frames_ok),
	ENIC_RX_STAT(rx_broadcast_frames_ok),
	ENIC_RX_STAT(rx_bytes_ok),
	ENIC_RX_STAT(rx_unicast_bytes_ok),
	ENIC_RX_STAT(rx_multicast_bytes_ok),
	ENIC_RX_STAT(rx_broadcast_bytes_ok),
	ENIC_RX_STAT(rx_drop),
	ENIC_RX_STAT(rx_no_bufs),
	ENIC_RX_STAT(rx_errors),
	ENIC_RX_STAT(rx_rss),
	ENIC_RX_STAT(rx_crc_errors),
	ENIC_RX_STAT(rx_frames_64),
	ENIC_RX_STAT(rx_frames_127),
	ENIC_RX_STAT(rx_frames_255),
	ENIC_RX_STAT(rx_frames_511),
	ENIC_RX_STAT(rx_frames_1023),
	ENIC_RX_STAT(rx_frames_1518),
	ENIC_RX_STAT(rx_frames_to_max),
};

static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);

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static int enic_is_dynamic(struct enic *enic)
{
	return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
}

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static int enic_get_settings(struct net_device *netdev,
	struct ethtool_cmd *ecmd)
{
	struct enic *enic = netdev_priv(netdev);

	ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
	ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
	ecmd->port = PORT_FIBRE;
	ecmd->transceiver = XCVR_EXTERNAL;

	if (netif_carrier_ok(netdev)) {
		ecmd->speed = vnic_dev_port_speed(enic->vdev);
		ecmd->duplex = DUPLEX_FULL;
	} else {
		ecmd->speed = -1;
		ecmd->duplex = -1;
	}

	ecmd->autoneg = AUTONEG_DISABLE;

	return 0;
}

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static int enic_dev_fw_info(struct enic *enic,
	struct vnic_devcmd_fw_info **fw_info)
{
	int err;

	spin_lock(&enic->devcmd_lock);
	err = vnic_dev_fw_info(enic->vdev, fw_info);
	spin_unlock(&enic->devcmd_lock);

	return err;
}

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static void enic_get_drvinfo(struct net_device *netdev,
	struct ethtool_drvinfo *drvinfo)
{
	struct enic *enic = netdev_priv(netdev);
	struct vnic_devcmd_fw_info *fw_info;

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	enic_dev_fw_info(enic, &fw_info);
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	strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
	strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
	strncpy(drvinfo->fw_version, fw_info->fw_version,
		sizeof(drvinfo->fw_version));
	strncpy(drvinfo->bus_info, pci_name(enic->pdev),
		sizeof(drvinfo->bus_info));
}

static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
{
	unsigned int i;

	switch (stringset) {
	case ETH_SS_STATS:
		for (i = 0; i < enic_n_tx_stats; i++) {
			memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
			data += ETH_GSTRING_LEN;
		}
		for (i = 0; i < enic_n_rx_stats; i++) {
			memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
			data += ETH_GSTRING_LEN;
		}
		break;
	}
}

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static int enic_get_sset_count(struct net_device *netdev, int sset)
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{
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	switch (sset) {
	case ETH_SS_STATS:
		return enic_n_tx_stats + enic_n_rx_stats;
	default:
		return -EOPNOTSUPP;
	}
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}

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static int enic_dev_stats_dump(struct enic *enic, struct vnic_stats **vstats)
{
	int err;

	spin_lock(&enic->devcmd_lock);
	err = vnic_dev_stats_dump(enic->vdev, vstats);
	spin_unlock(&enic->devcmd_lock);

	return err;
}

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static void enic_get_ethtool_stats(struct net_device *netdev,
	struct ethtool_stats *stats, u64 *data)
{
	struct enic *enic = netdev_priv(netdev);
	struct vnic_stats *vstats;
	unsigned int i;

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	enic_dev_stats_dump(enic, &vstats);
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	for (i = 0; i < enic_n_tx_stats; i++)
		*(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
	for (i = 0; i < enic_n_rx_stats; i++)
		*(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
}

static u32 enic_get_rx_csum(struct net_device *netdev)
{
	struct enic *enic = netdev_priv(netdev);
	return enic->csum_rx_enabled;
}

static int enic_set_rx_csum(struct net_device *netdev, u32 data)
{
	struct enic *enic = netdev_priv(netdev);

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	if (data && !ENIC_SETTING(enic, RXCSUM))
		return -EINVAL;

	enic->csum_rx_enabled = !!data;
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	return 0;
}

static int enic_set_tx_csum(struct net_device *netdev, u32 data)
{
	struct enic *enic = netdev_priv(netdev);

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	if (data && !ENIC_SETTING(enic, TXCSUM))
		return -EINVAL;

	if (data)
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		netdev->features |= NETIF_F_HW_CSUM;
	else
		netdev->features &= ~NETIF_F_HW_CSUM;

	return 0;
}

static int enic_set_tso(struct net_device *netdev, u32 data)
{
	struct enic *enic = netdev_priv(netdev);

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	if (data && !ENIC_SETTING(enic, TSO))
		return -EINVAL;

	if (data)
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		netdev->features |=
			NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN;
	else
		netdev->features &=
			~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN);

	return 0;
}

static u32 enic_get_msglevel(struct net_device *netdev)
{
	struct enic *enic = netdev_priv(netdev);
	return enic->msg_enable;
}

static void enic_set_msglevel(struct net_device *netdev, u32 value)
{
	struct enic *enic = netdev_priv(netdev);
	enic->msg_enable = value;
}

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static int enic_get_coalesce(struct net_device *netdev,
	struct ethtool_coalesce *ecmd)
{
	struct enic *enic = netdev_priv(netdev);

	ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
	ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;

	return 0;
}

static int enic_set_coalesce(struct net_device *netdev,
	struct ethtool_coalesce *ecmd)
{
	struct enic *enic = netdev_priv(netdev);
	u32 tx_coalesce_usecs;
	u32 rx_coalesce_usecs;

	tx_coalesce_usecs = min_t(u32,
		INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
		ecmd->tx_coalesce_usecs);
	rx_coalesce_usecs = min_t(u32,
		INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
		ecmd->rx_coalesce_usecs);

	switch (vnic_dev_get_intr_mode(enic->vdev)) {
	case VNIC_DEV_INTR_MODE_INTX:
		if (tx_coalesce_usecs != rx_coalesce_usecs)
			return -EINVAL;

		vnic_intr_coalescing_timer_set(&enic->intr[ENIC_INTX_WQ_RQ],
			INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
		break;
	case VNIC_DEV_INTR_MODE_MSI:
		if (tx_coalesce_usecs != rx_coalesce_usecs)
			return -EINVAL;

		vnic_intr_coalescing_timer_set(&enic->intr[0],
			INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
		break;
	case VNIC_DEV_INTR_MODE_MSIX:
		vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_WQ],
			INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
		vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_RQ],
			INTR_COALESCE_USEC_TO_HW(rx_coalesce_usecs));
		break;
	default:
		break;
	}

	enic->tx_coalesce_usecs = tx_coalesce_usecs;
	enic->rx_coalesce_usecs = rx_coalesce_usecs;

	return 0;
}

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static const struct ethtool_ops enic_ethtool_ops = {
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	.get_settings = enic_get_settings,
	.get_drvinfo = enic_get_drvinfo,
	.get_msglevel = enic_get_msglevel,
	.set_msglevel = enic_set_msglevel,
	.get_link = ethtool_op_get_link,
	.get_strings = enic_get_strings,
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	.get_sset_count = enic_get_sset_count,
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	.get_ethtool_stats = enic_get_ethtool_stats,
	.get_rx_csum = enic_get_rx_csum,
	.set_rx_csum = enic_set_rx_csum,
	.get_tx_csum = ethtool_op_get_tx_csum,
	.set_tx_csum = enic_set_tx_csum,
	.get_sg = ethtool_op_get_sg,
	.set_sg = ethtool_op_set_sg,
	.get_tso = ethtool_op_get_tso,
	.set_tso = enic_set_tso,
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	.get_coalesce = enic_get_coalesce,
	.set_coalesce = enic_set_coalesce,
S
Scott Feldman 已提交
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	.get_flags = ethtool_op_get_flags,
	.set_flags = ethtool_op_set_flags,
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};

static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
{
	struct enic *enic = vnic_dev_priv(wq->vdev);

	if (buf->sop)
		pci_unmap_single(enic->pdev, buf->dma_addr,
			buf->len, PCI_DMA_TODEVICE);
	else
		pci_unmap_page(enic->pdev, buf->dma_addr,
			buf->len, PCI_DMA_TODEVICE);

	if (buf->os_buf)
		dev_kfree_skb_any(buf->os_buf);
}

static void enic_wq_free_buf(struct vnic_wq *wq,
	struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
{
	enic_free_wq_buf(wq, buf);
}

static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
	u8 type, u16 q_number, u16 completed_index, void *opaque)
{
	struct enic *enic = vnic_dev_priv(vdev);

	spin_lock(&enic->wq_lock[q_number]);

	vnic_wq_service(&enic->wq[q_number], cq_desc,
		completed_index, enic_wq_free_buf,
		opaque);

	if (netif_queue_stopped(enic->netdev) &&
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	    vnic_wq_desc_avail(&enic->wq[q_number]) >=
	    (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
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		netif_wake_queue(enic->netdev);

	spin_unlock(&enic->wq_lock[q_number]);

	return 0;
}

static void enic_log_q_error(struct enic *enic)
{
	unsigned int i;
	u32 error_status;

	for (i = 0; i < enic->wq_count; i++) {
		error_status = vnic_wq_error_status(&enic->wq[i]);
		if (error_status)
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			netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
				i, error_status);
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	}

	for (i = 0; i < enic->rq_count; i++) {
		error_status = vnic_rq_error_status(&enic->rq[i]);
		if (error_status)
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			netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
				i, error_status);
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	}
}

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static void enic_msglvl_check(struct enic *enic)
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{
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	u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
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	if (msg_enable != enic->msg_enable) {
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		netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
			enic->msg_enable, msg_enable);
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		enic->msg_enable = msg_enable;
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	}
}

static void enic_mtu_check(struct enic *enic)
{
	u32 mtu = vnic_dev_mtu(enic->vdev);
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	struct net_device *netdev = enic->netdev;
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	if (mtu && mtu != enic->port_mtu) {
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		enic->port_mtu = mtu;
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		if (mtu < netdev->mtu)
			netdev_warn(netdev,
				"interface MTU (%d) set higher "
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				"than switch port MTU (%d)\n",
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				netdev->mtu, mtu);
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	}
}

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static void enic_link_check(struct enic *enic)
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{
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	int link_status = vnic_dev_link_status(enic->vdev);
	int carrier_ok = netif_carrier_ok(enic->netdev);
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	if (link_status && !carrier_ok) {
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		netdev_info(enic->netdev, "Link UP\n");
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		netif_carrier_on(enic->netdev);
	} else if (!link_status && carrier_ok) {
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		netdev_info(enic->netdev, "Link DOWN\n");
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		netif_carrier_off(enic->netdev);
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	}
}

static void enic_notify_check(struct enic *enic)
{
	enic_msglvl_check(enic);
	enic_mtu_check(enic);
	enic_link_check(enic);
}

#define ENIC_TEST_INTR(pba, i) (pba & (1 << i))

static irqreturn_t enic_isr_legacy(int irq, void *data)
{
	struct net_device *netdev = data;
	struct enic *enic = netdev_priv(netdev);
	u32 pba;

	vnic_intr_mask(&enic->intr[ENIC_INTX_WQ_RQ]);

	pba = vnic_intr_legacy_pba(enic->legacy_pba);
	if (!pba) {
		vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
		return IRQ_NONE;	/* not our interrupt */
	}

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	if (ENIC_TEST_INTR(pba, ENIC_INTX_NOTIFY)) {
		vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_NOTIFY]);
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		enic_notify_check(enic);
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	}
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	if (ENIC_TEST_INTR(pba, ENIC_INTX_ERR)) {
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		vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_ERR]);
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		enic_log_q_error(enic);
		/* schedule recovery from WQ/RQ error */
		schedule_work(&enic->reset);
		return IRQ_HANDLED;
	}

	if (ENIC_TEST_INTR(pba, ENIC_INTX_WQ_RQ)) {
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		if (napi_schedule_prep(&enic->napi))
			__napi_schedule(&enic->napi);
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	} else {
		vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
	}

	return IRQ_HANDLED;
}

static irqreturn_t enic_isr_msi(int irq, void *data)
{
	struct enic *enic = data;

	/* With MSI, there is no sharing of interrupts, so this is
	 * our interrupt and there is no need to ack it.  The device
	 * is not providing per-vector masking, so the OS will not
	 * write to PCI config space to mask/unmask the interrupt.
	 * We're using mask_on_assertion for MSI, so the device
	 * automatically masks the interrupt when the interrupt is
	 * generated.  Later, when exiting polling, the interrupt
	 * will be unmasked (see enic_poll).
	 *
	 * Also, the device uses the same PCIe Traffic Class (TC)
	 * for Memory Write data and MSI, so there are no ordering
	 * issues; the MSI will always arrive at the Root Complex
	 * _after_ corresponding Memory Writes (i.e. descriptor
	 * writes).
	 */

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	napi_schedule(&enic->napi);
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	return IRQ_HANDLED;
}

static irqreturn_t enic_isr_msix_rq(int irq, void *data)
{
	struct enic *enic = data;

	/* schedule NAPI polling for RQ cleanup */
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	napi_schedule(&enic->napi);
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	return IRQ_HANDLED;
}

static irqreturn_t enic_isr_msix_wq(int irq, void *data)
{
	struct enic *enic = data;
	unsigned int wq_work_to_do = -1; /* no limit */
	unsigned int wq_work_done;

	wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
		wq_work_to_do, enic_wq_service, NULL);

	vnic_intr_return_credits(&enic->intr[ENIC_MSIX_WQ],
		wq_work_done,
		1 /* unmask intr */,
		1 /* reset intr timer */);

	return IRQ_HANDLED;
}

static irqreturn_t enic_isr_msix_err(int irq, void *data)
{
	struct enic *enic = data;

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	vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_ERR]);

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	enic_log_q_error(enic);

	/* schedule recovery from WQ/RQ error */
	schedule_work(&enic->reset);

	return IRQ_HANDLED;
}

static irqreturn_t enic_isr_msix_notify(int irq, void *data)
{
	struct enic *enic = data;

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	vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_NOTIFY]);
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	enic_notify_check(enic);

	return IRQ_HANDLED;
}

static inline void enic_queue_wq_skb_cont(struct enic *enic,
	struct vnic_wq *wq, struct sk_buff *skb,
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	unsigned int len_left, int loopback)
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{
	skb_frag_t *frag;

	/* Queue additional data fragments */
	for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
		len_left -= frag->size;
		enic_queue_wq_desc_cont(wq, skb,
			pci_map_page(enic->pdev, frag->page,
				frag->page_offset, frag->size,
				PCI_DMA_TODEVICE),
			frag->size,
609 610
			(len_left == 0),	/* EOP? */
			loopback);
611 612 613 614 615
	}
}

static inline void enic_queue_wq_skb_vlan(struct enic *enic,
	struct vnic_wq *wq, struct sk_buff *skb,
616
	int vlan_tag_insert, unsigned int vlan_tag, int loopback)
617 618 619 620 621
{
	unsigned int head_len = skb_headlen(skb);
	unsigned int len_left = skb->len - head_len;
	int eop = (len_left == 0);

622 623 624 625 626
	/* Queue the main skb fragment. The fragments are no larger
	 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
	 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
	 * per fragment is queued.
	 */
627 628 629 630 631
	enic_queue_wq_desc(wq, skb,
		pci_map_single(enic->pdev, skb->data,
			head_len, PCI_DMA_TODEVICE),
		head_len,
		vlan_tag_insert, vlan_tag,
632
		eop, loopback);
633 634

	if (!eop)
635
		enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
636 637 638 639
}

static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
	struct vnic_wq *wq, struct sk_buff *skb,
640
	int vlan_tag_insert, unsigned int vlan_tag, int loopback)
641 642 643 644 645 646 647
{
	unsigned int head_len = skb_headlen(skb);
	unsigned int len_left = skb->len - head_len;
	unsigned int hdr_len = skb_transport_offset(skb);
	unsigned int csum_offset = hdr_len + skb->csum_offset;
	int eop = (len_left == 0);

648 649 650 651 652
	/* Queue the main skb fragment. The fragments are no larger
	 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
	 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
	 * per fragment is queued.
	 */
653 654 655 656 657 658 659
	enic_queue_wq_desc_csum_l4(wq, skb,
		pci_map_single(enic->pdev, skb->data,
			head_len, PCI_DMA_TODEVICE),
		head_len,
		csum_offset,
		hdr_len,
		vlan_tag_insert, vlan_tag,
660
		eop, loopback);
661 662

	if (!eop)
663
		enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
664 665 666 667
}

static inline void enic_queue_wq_skb_tso(struct enic *enic,
	struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
668
	int vlan_tag_insert, unsigned int vlan_tag, int loopback)
669
{
670 671
	unsigned int frag_len_left = skb_headlen(skb);
	unsigned int len_left = skb->len - frag_len_left;
672 673
	unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
	int eop = (len_left == 0);
674 675 676 677
	unsigned int len;
	dma_addr_t dma_addr;
	unsigned int offset = 0;
	skb_frag_t *frag;
678 679 680 681 682 683

	/* Preload TCP csum field with IP pseudo hdr calculated
	 * with IP length set to zero.  HW will later add in length
	 * to each TCP segment resulting from the TSO.
	 */

684
	if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
685 686 687
		ip_hdr(skb)->check = 0;
		tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
			ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
688
	} else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
689 690 691 692
		tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
			&ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
	}

693 694 695 696 697 698 699 700 701 702 703 704
	/* Queue WQ_ENET_MAX_DESC_LEN length descriptors
	 * for the main skb fragment
	 */
	while (frag_len_left) {
		len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
		dma_addr = pci_map_single(enic->pdev, skb->data + offset,
				len, PCI_DMA_TODEVICE);
		enic_queue_wq_desc_tso(wq, skb,
			dma_addr,
			len,
			mss, hdr_len,
			vlan_tag_insert, vlan_tag,
705
			eop && (len == frag_len_left), loopback);
706 707 708
		frag_len_left -= len;
		offset += len;
	}
709

710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730
	if (eop)
		return;

	/* Queue WQ_ENET_MAX_DESC_LEN length descriptors
	 * for additional data fragments
	 */
	for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
		len_left -= frag->size;
		frag_len_left = frag->size;
		offset = frag->page_offset;

		while (frag_len_left) {
			len = min(frag_len_left,
				(unsigned int)WQ_ENET_MAX_DESC_LEN);
			dma_addr = pci_map_page(enic->pdev, frag->page,
				offset, len,
				PCI_DMA_TODEVICE);
			enic_queue_wq_desc_cont(wq, skb,
				dma_addr,
				len,
				(len_left == 0) &&
731 732
				(len == frag_len_left),		/* EOP? */
				loopback);
733 734 735 736
			frag_len_left -= len;
			offset += len;
		}
	}
737 738 739 740 741 742 743 744
}

static inline void enic_queue_wq_skb(struct enic *enic,
	struct vnic_wq *wq, struct sk_buff *skb)
{
	unsigned int mss = skb_shinfo(skb)->gso_size;
	unsigned int vlan_tag = 0;
	int vlan_tag_insert = 0;
745
	int loopback = 0;
746 747 748 749 750

	if (enic->vlan_group && vlan_tx_tag_present(skb)) {
		/* VLAN tag from trunking driver */
		vlan_tag_insert = 1;
		vlan_tag = vlan_tx_tag_get(skb);
751 752 753
	} else if (enic->loop_enable) {
		vlan_tag = enic->loop_tag;
		loopback = 1;
754 755 756 757
	}

	if (mss)
		enic_queue_wq_skb_tso(enic, wq, skb, mss,
758
			vlan_tag_insert, vlan_tag, loopback);
759 760
	else if	(skb->ip_summed == CHECKSUM_PARTIAL)
		enic_queue_wq_skb_csum_l4(enic, wq, skb,
761
			vlan_tag_insert, vlan_tag, loopback);
762 763
	else
		enic_queue_wq_skb_vlan(enic, wq, skb,
764
			vlan_tag_insert, vlan_tag, loopback);
765 766
}

767
/* netif_tx_lock held, process context with BHs disabled, or BH */
768
static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
769
	struct net_device *netdev)
770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793
{
	struct enic *enic = netdev_priv(netdev);
	struct vnic_wq *wq = &enic->wq[0];
	unsigned long flags;

	if (skb->len <= 0) {
		dev_kfree_skb(skb);
		return NETDEV_TX_OK;
	}

	/* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
	 * which is very likely.  In the off chance it's going to take
	 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
	 */

	if (skb_shinfo(skb)->gso_size == 0 &&
	    skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
	    skb_linearize(skb)) {
		dev_kfree_skb(skb);
		return NETDEV_TX_OK;
	}

	spin_lock_irqsave(&enic->wq_lock[0], flags);

794 795
	if (vnic_wq_desc_avail(wq) <
	    skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
796 797
		netif_stop_queue(netdev);
		/* This is a hard error, log it */
798
		netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
799 800 801 802 803 804
		spin_unlock_irqrestore(&enic->wq_lock[0], flags);
		return NETDEV_TX_BUSY;
	}

	enic_queue_wq_skb(enic, wq, skb);

805
	if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
806 807 808 809 810 811 812 813 814 815 816
		netif_stop_queue(netdev);

	spin_unlock_irqrestore(&enic->wq_lock[0], flags);

	return NETDEV_TX_OK;
}

/* dev_base_lock rwlock held, nominally process context */
static struct net_device_stats *enic_get_stats(struct net_device *netdev)
{
	struct enic *enic = netdev_priv(netdev);
817
	struct net_device_stats *net_stats = &netdev->stats;
818 819
	struct vnic_stats *stats;

820
	enic_dev_stats_dump(enic, &stats);
821

822 823 824 825
	net_stats->tx_packets = stats->tx.tx_frames_ok;
	net_stats->tx_bytes = stats->tx.tx_bytes_ok;
	net_stats->tx_errors = stats->tx.tx_errors;
	net_stats->tx_dropped = stats->tx.tx_drops;
826

827 828 829 830
	net_stats->rx_packets = stats->rx.rx_frames_ok;
	net_stats->rx_bytes = stats->rx.rx_bytes_ok;
	net_stats->rx_errors = stats->rx.rx_errors;
	net_stats->multicast = stats->rx.rx_multicast_frames_ok;
831
	net_stats->rx_over_errors = enic->rq_truncated_pkts;
832
	net_stats->rx_crc_errors = enic->rq_bad_fcs;
833
	net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
834

835
	return net_stats;
836 837
}

838
static void enic_reset_multicast_list(struct enic *enic)
839 840
{
	enic->mc_count = 0;
841
	enic->flags = 0;
842 843 844 845
}

static int enic_set_mac_addr(struct net_device *netdev, char *addr)
{
846 847 848 849 850 851 852 853 854
	struct enic *enic = netdev_priv(netdev);

	if (enic_is_dynamic(enic)) {
		if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
			return -EADDRNOTAVAIL;
	} else {
		if (!is_valid_ether_addr(addr))
			return -EADDRNOTAVAIL;
	}
855 856 857 858 859 860

	memcpy(netdev->dev_addr, addr, netdev->addr_len);

	return 0;
}

861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917
static int enic_dev_add_station_addr(struct enic *enic)
{
	int err = 0;

	if (is_valid_ether_addr(enic->netdev->dev_addr)) {
		spin_lock(&enic->devcmd_lock);
		err = vnic_dev_add_addr(enic->vdev, enic->netdev->dev_addr);
		spin_unlock(&enic->devcmd_lock);
	}

	return err;
}

static int enic_dev_del_station_addr(struct enic *enic)
{
	int err = 0;

	if (is_valid_ether_addr(enic->netdev->dev_addr)) {
		spin_lock(&enic->devcmd_lock);
		err = vnic_dev_del_addr(enic->vdev, enic->netdev->dev_addr);
		spin_unlock(&enic->devcmd_lock);
	}

	return err;
}

static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
{
	struct enic *enic = netdev_priv(netdev);
	struct sockaddr *saddr = p;
	char *addr = saddr->sa_data;
	int err;

	if (netif_running(enic->netdev)) {
		err = enic_dev_del_station_addr(enic);
		if (err)
			return err;
	}

	err = enic_set_mac_addr(netdev, addr);
	if (err)
		return err;

	if (netif_running(enic->netdev)) {
		err = enic_dev_add_station_addr(enic);
		if (err)
			return err;
	}

	return err;
}

static int enic_set_mac_address(struct net_device *netdev, void *p)
{
	return -EOPNOTSUPP;
}

918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952
static int enic_dev_packet_filter(struct enic *enic, int directed,
	int multicast, int broadcast, int promisc, int allmulti)
{
	int err;

	spin_lock(&enic->devcmd_lock);
	err = vnic_dev_packet_filter(enic->vdev, directed,
		multicast, broadcast, promisc, allmulti);
	spin_unlock(&enic->devcmd_lock);

	return err;
}

static int enic_dev_add_multicast_addr(struct enic *enic, u8 *addr)
{
	int err;

	spin_lock(&enic->devcmd_lock);
	err = vnic_dev_add_addr(enic->vdev, addr);
	spin_unlock(&enic->devcmd_lock);

	return err;
}

static int enic_dev_del_multicast_addr(struct enic *enic, u8 *addr)
{
	int err;

	spin_lock(&enic->devcmd_lock);
	err = vnic_dev_del_addr(enic->vdev, addr);
	spin_unlock(&enic->devcmd_lock);

	return err;
}

953 954 955 956
/* netif_tx_lock held, BHs disabled */
static void enic_set_multicast_list(struct net_device *netdev)
{
	struct enic *enic = netdev_priv(netdev);
957
	struct netdev_hw_addr *ha;
958 959 960 961
	int directed = 1;
	int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
	int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
	int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0;
962
	unsigned int mc_count = netdev_mc_count(netdev);
963
	int allmulti = (netdev->flags & IFF_ALLMULTI) ||
964
		mc_count > ENIC_MULTICAST_PERFECT_FILTERS;
965
	unsigned int flags = netdev->flags | (allmulti ? IFF_ALLMULTI : 0);
966 967 968 969 970 971
	u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
	unsigned int i, j;

	if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS)
		mc_count = ENIC_MULTICAST_PERFECT_FILTERS;

972 973
	if (enic->flags != flags) {
		enic->flags = flags;
974
		enic_dev_packet_filter(enic, directed,
975 976
			multicast, broadcast, promisc, allmulti);
	}
977 978 979 980 981 982 983

	/* Is there an easier way?  Trying to minimize to
	 * calls to add/del multicast addrs.  We keep the
	 * addrs from the last call in enic->mc_addr and
	 * look for changes to add/del.
	 */

984
	i = 0;
985
	netdev_for_each_mc_addr(ha, netdev) {
986 987
		if (i == mc_count)
			break;
988
		memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
989 990 991 992 993 994 995 996
	}

	for (i = 0; i < enic->mc_count; i++) {
		for (j = 0; j < mc_count; j++)
			if (compare_ether_addr(enic->mc_addr[i],
				mc_addr[j]) == 0)
				break;
		if (j == mc_count)
997
			enic_dev_del_multicast_addr(enic, enic->mc_addr[i]);
998 999 1000 1001 1002 1003 1004 1005
	}

	for (i = 0; i < mc_count; i++) {
		for (j = 0; j < enic->mc_count; j++)
			if (compare_ether_addr(mc_addr[i],
				enic->mc_addr[j]) == 0)
				break;
		if (j == enic->mc_count)
1006
			enic_dev_add_multicast_addr(enic, mc_addr[i]);
1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052
	}

	/* Save the list to compare against next time
	 */

	for (i = 0; i < mc_count; i++)
		memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);

	enic->mc_count = mc_count;
}

/* rtnl lock is held */
static void enic_vlan_rx_register(struct net_device *netdev,
	struct vlan_group *vlan_group)
{
	struct enic *enic = netdev_priv(netdev);
	enic->vlan_group = vlan_group;
}

/* rtnl lock is held */
static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
{
	struct enic *enic = netdev_priv(netdev);

	spin_lock(&enic->devcmd_lock);
	enic_add_vlan(enic, vid);
	spin_unlock(&enic->devcmd_lock);
}

/* rtnl lock is held */
static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
{
	struct enic *enic = netdev_priv(netdev);

	spin_lock(&enic->devcmd_lock);
	enic_del_vlan(enic, vid);
	spin_unlock(&enic->devcmd_lock);
}

/* netif_tx_lock held, BHs disabled */
static void enic_tx_timeout(struct net_device *netdev)
{
	struct enic *enic = netdev_priv(netdev);
	schedule_work(&enic->reset);
}

1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086
static int enic_vnic_dev_deinit(struct enic *enic)
{
	int err;

	spin_lock(&enic->devcmd_lock);
	err = vnic_dev_deinit(enic->vdev);
	spin_unlock(&enic->devcmd_lock);

	return err;
}

static int enic_dev_init_prov(struct enic *enic, struct vic_provinfo *vp)
{
	int err;

	spin_lock(&enic->devcmd_lock);
	err = vnic_dev_init_prov(enic->vdev,
		(u8 *)vp, vic_provinfo_size(vp));
	spin_unlock(&enic->devcmd_lock);

	return err;
}

static int enic_dev_init_done(struct enic *enic, int *done, int *error)
{
	int err;

	spin_lock(&enic->devcmd_lock);
	err = vnic_dev_init_done(enic->vdev, done, error);
	spin_unlock(&enic->devcmd_lock);

	return err;
}

1087
static int enic_set_port_profile(struct enic *enic, u8 *mac)
1088 1089 1090
{
	struct vic_provinfo *vp;
	u8 oui[3] = VIC_PROVINFO_CISCO_OUI;
1091
	u8 *uuid;
1092
	char uuid_str[38];
1093 1094
	static char *uuid_fmt = "%02X%02X%02X%02X-%02X%02X-%02X%02X-"
		"%02X%02X-%02X%02X%02X%02X%0X%02X";
1095 1096
	int err;

1097 1098 1099
	err = enic_vnic_dev_deinit(enic);
	if (err)
		return err;
1100

1101
	switch (enic->pp.request) {
1102

1103
	case PORT_REQUEST_ASSOCIATE:
1104

1105 1106
		if (!(enic->pp.set & ENIC_SET_NAME) || !strlen(enic->pp.name))
			return -EINVAL;
1107

1108 1109
		if (!is_valid_ether_addr(mac))
			return -EADDRNOTAVAIL;
1110

1111 1112 1113 1114
		vp = vic_provinfo_alloc(GFP_KERNEL, oui,
			VIC_PROVINFO_LINUX_TYPE);
		if (!vp)
			return -ENOMEM;
1115 1116

		vic_provinfo_add_tlv(vp,
1117 1118
			VIC_LINUX_PROV_TLV_PORT_PROFILE_NAME_STR,
			strlen(enic->pp.name) + 1, enic->pp.name);
1119

1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134
		vic_provinfo_add_tlv(vp,
			VIC_LINUX_PROV_TLV_CLIENT_MAC_ADDR,
			ETH_ALEN, mac);

		if (enic->pp.set & ENIC_SET_INSTANCE) {
			uuid = enic->pp.instance_uuid;
			sprintf(uuid_str, uuid_fmt,
				uuid[0],  uuid[1],  uuid[2],  uuid[3],
				uuid[4],  uuid[5],  uuid[6],  uuid[7],
				uuid[8],  uuid[9],  uuid[10], uuid[11],
				uuid[12], uuid[13], uuid[14], uuid[15]);
			vic_provinfo_add_tlv(vp,
				VIC_LINUX_PROV_TLV_CLIENT_UUID_STR,
				sizeof(uuid_str), uuid_str);
		}
1135

1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146
		if (enic->pp.set & ENIC_SET_HOST) {
			uuid = enic->pp.host_uuid;
			sprintf(uuid_str, uuid_fmt,
				uuid[0],  uuid[1],  uuid[2],  uuid[3],
				uuid[4],  uuid[5],  uuid[6],  uuid[7],
				uuid[8],  uuid[9],  uuid[10], uuid[11],
				uuid[12], uuid[13], uuid[14], uuid[15]);
			vic_provinfo_add_tlv(vp,
				VIC_LINUX_PROV_TLV_HOST_UUID_STR,
				sizeof(uuid_str), uuid_str);
		}
1147

1148 1149 1150 1151 1152
		err = enic_dev_init_prov(enic, vp);
		vic_provinfo_free(vp);
		if (err)
			return err;
		break;
1153

1154 1155
	case PORT_REQUEST_DISASSOCIATE:
		break;
1156

1157 1158 1159
	default:
		return -EINVAL;
	}
1160

1161 1162
	enic->pp.set |= ENIC_SET_APPLIED;
	return 0;
1163 1164 1165 1166 1167 1168
}

static int enic_set_vf_port(struct net_device *netdev, int vf,
	struct nlattr *port[])
{
	struct enic *enic = netdev_priv(netdev);
1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193

	memset(&enic->pp, 0, sizeof(enic->pp));

	if (port[IFLA_PORT_REQUEST]) {
		enic->pp.set |= ENIC_SET_REQUEST;
		enic->pp.request = nla_get_u8(port[IFLA_PORT_REQUEST]);
	}

	if (port[IFLA_PORT_PROFILE]) {
		enic->pp.set |= ENIC_SET_NAME;
		memcpy(enic->pp.name, nla_data(port[IFLA_PORT_PROFILE]),
			PORT_PROFILE_MAX);
	}

	if (port[IFLA_PORT_INSTANCE_UUID]) {
		enic->pp.set |= ENIC_SET_INSTANCE;
		memcpy(enic->pp.instance_uuid,
			nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
	}

	if (port[IFLA_PORT_HOST_UUID]) {
		enic->pp.set |= ENIC_SET_HOST;
		memcpy(enic->pp.host_uuid,
			nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
	}
1194 1195 1196 1197 1198

	/* don't support VFs, yet */
	if (vf != PORT_SELF_VF)
		return -EOPNOTSUPP;

1199 1200
	if (!(enic->pp.set & ENIC_SET_REQUEST))
		return -EOPNOTSUPP;
1201

1202
	if (enic->pp.request == PORT_REQUEST_ASSOCIATE) {
1203

1204 1205 1206 1207 1208 1209 1210
		/* If the interface mac addr hasn't been assigned,
		 * assign a random mac addr before setting port-
		 * profile.
		 */

		if (is_zero_ether_addr(netdev->dev_addr))
			random_ether_addr(netdev->dev_addr);
1211 1212
	}

1213
	return enic_set_port_profile(enic, netdev->dev_addr);
1214 1215 1216 1217 1218 1219 1220 1221 1222
}

static int enic_get_vf_port(struct net_device *netdev, int vf,
	struct sk_buff *skb)
{
	struct enic *enic = netdev_priv(netdev);
	int err, error, done;
	u16 response = PORT_PROFILE_RESPONSE_SUCCESS;

1223 1224
	if (!(enic->pp.set & ENIC_SET_APPLIED))
		return -ENODATA;
1225 1226 1227

	err = enic_dev_init_done(enic, &done, &error);
	if (err)
1228
		error = err;
1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250

	switch (error) {
	case ERR_SUCCESS:
		if (!done)
			response = PORT_PROFILE_RESPONSE_INPROGRESS;
		break;
	case ERR_EINVAL:
		response = PORT_PROFILE_RESPONSE_INVALID;
		break;
	case ERR_EBADSTATE:
		response = PORT_PROFILE_RESPONSE_BADSTATE;
		break;
	case ERR_ENOMEM:
		response = PORT_PROFILE_RESPONSE_INSUFFICIENT_RESOURCES;
		break;
	default:
		response = PORT_PROFILE_RESPONSE_ERROR;
		break;
	}

	NLA_PUT_U16(skb, IFLA_PORT_REQUEST, enic->pp.request);
	NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response);
1251 1252 1253 1254 1255 1256 1257 1258 1259
	if (enic->pp.set & ENIC_SET_NAME)
		NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX,
			enic->pp.name);
	if (enic->pp.set & ENIC_SET_INSTANCE)
		NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
			enic->pp.instance_uuid);
	if (enic->pp.set & ENIC_SET_HOST)
		NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX,
			enic->pp.host_uuid);
1260 1261 1262 1263 1264 1265 1266

	return 0;

nla_put_failure:
	return -EMSGSIZE;
}

1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281
static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
{
	struct enic *enic = vnic_dev_priv(rq->vdev);

	if (!buf->os_buf)
		return;

	pci_unmap_single(enic->pdev, buf->dma_addr,
		buf->len, PCI_DMA_FROMDEVICE);
	dev_kfree_skb_any(buf->os_buf);
}

static int enic_rq_alloc_buf(struct vnic_rq *rq)
{
	struct enic *enic = vnic_dev_priv(rq->vdev);
S
Scott Feldman 已提交
1282
	struct net_device *netdev = enic->netdev;
1283
	struct sk_buff *skb;
1284
	unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1285 1286 1287
	unsigned int os_buf_index = 0;
	dma_addr_t dma_addr;

1288
	skb = netdev_alloc_skb_ip_align(netdev, len);
1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300
	if (!skb)
		return -ENOMEM;

	dma_addr = pci_map_single(enic->pdev, skb->data,
		len, PCI_DMA_FROMDEVICE);

	enic_queue_rq_desc(rq, skb, os_buf_index,
		dma_addr, len);

	return 0;
}

S
Scott Feldman 已提交
1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320
static int enic_rq_alloc_buf_a1(struct vnic_rq *rq)
{
	struct rq_enet_desc *desc = vnic_rq_next_desc(rq);

	if (vnic_rq_posting_soon(rq)) {

		/* SW workaround for A0 HW erratum: if we're just about
		 * to write posted_index, insert a dummy desc
		 * of type resvd
		 */

		rq_enet_desc_enc(desc, 0, RQ_ENET_TYPE_RESV2, 0);
		vnic_rq_post(rq, 0, 0, 0, 0);
	} else {
		return enic_rq_alloc_buf(rq);
	}

	return 0;
}

1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332
static int enic_dev_hw_version(struct enic *enic,
	enum vnic_dev_hw_version *hw_ver)
{
	int err;

	spin_lock(&enic->devcmd_lock);
	err = vnic_dev_hw_version(enic->vdev, hw_ver);
	spin_unlock(&enic->devcmd_lock);

	return err;
}

S
Scott Feldman 已提交
1333 1334 1335 1336 1337
static int enic_set_rq_alloc_buf(struct enic *enic)
{
	enum vnic_dev_hw_version hw_ver;
	int err;

1338
	err = enic_dev_hw_version(enic, &hw_ver);
S
Scott Feldman 已提交
1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356
	if (err)
		return err;

	switch (hw_ver) {
	case VNIC_DEV_HW_VER_A1:
		enic->rq_alloc_buf = enic_rq_alloc_buf_a1;
		break;
	case VNIC_DEV_HW_VER_A2:
	case VNIC_DEV_HW_VER_UNKNOWN:
		enic->rq_alloc_buf = enic_rq_alloc_buf;
		break;
	default:
		return -ENODEV;
	}

	return 0;
}

1357 1358 1359 1360 1361
static void enic_rq_indicate_buf(struct vnic_rq *rq,
	struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
	int skipped, void *opaque)
{
	struct enic *enic = vnic_dev_priv(rq->vdev);
S
Scott Feldman 已提交
1362
	struct net_device *netdev = enic->netdev;
1363 1364 1365 1366 1367 1368 1369
	struct sk_buff *skb;

	u8 type, color, eop, sop, ingress_port, vlan_stripped;
	u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
	u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
	u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
	u8 packet_error;
1370
	u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384
	u32 rss_hash;

	if (skipped)
		return;

	skb = buf->os_buf;
	prefetch(skb->data - NET_IP_ALIGN);
	pci_unmap_single(enic->pdev, buf->dma_addr,
		buf->len, PCI_DMA_FROMDEVICE);

	cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
		&type, &color, &q_number, &completed_index,
		&ingress_port, &fcoe, &eop, &sop, &rss_type,
		&csum_not_calc, &rss_hash, &bytes_written,
1385
		&packet_error, &vlan_stripped, &vlan_tci, &checksum,
1386 1387 1388 1389 1390 1391 1392
		&fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
		&fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
		&ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
		&fcs_ok);

	if (packet_error) {

1393 1394 1395 1396 1397 1398
		if (!fcs_ok) {
			if (bytes_written > 0)
				enic->rq_bad_fcs++;
			else if (bytes_written == 0)
				enic->rq_truncated_pkts++;
		}
1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410

		dev_kfree_skb_any(skb);

		return;
	}

	if (eop && bytes_written > 0) {

		/* Good receive
		 */

		skb_put(skb, bytes_written);
S
Scott Feldman 已提交
1411
		skb->protocol = eth_type_trans(skb, netdev);
1412 1413 1414 1415 1416 1417

		if (enic->csum_rx_enabled && !csum_not_calc) {
			skb->csum = htons(checksum);
			skb->ip_summed = CHECKSUM_COMPLETE;
		}

S
Scott Feldman 已提交
1418
		skb->dev = netdev;
1419

1420 1421
		if (enic->vlan_group && vlan_stripped &&
			(vlan_tci & CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_MASK)) {
1422

1423 1424
			if (netdev->features & NETIF_F_GRO)
				vlan_gro_receive(&enic->napi, enic->vlan_group,
1425
					vlan_tci, skb);
1426 1427
			else
				vlan_hwaccel_receive_skb(skb,
1428
					enic->vlan_group, vlan_tci);
1429 1430 1431

		} else {

1432 1433
			if (netdev->features & NETIF_F_GRO)
				napi_gro_receive(&enic->napi, skb);
1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465
			else
				netif_receive_skb(skb);

		}

	} else {

		/* Buffer overflow
		 */

		dev_kfree_skb_any(skb);
	}
}

static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
	u8 type, u16 q_number, u16 completed_index, void *opaque)
{
	struct enic *enic = vnic_dev_priv(vdev);

	vnic_rq_service(&enic->rq[q_number], cq_desc,
		completed_index, VNIC_RQ_RETURN_DESC,
		enic_rq_indicate_buf, opaque);

	return 0;
}

static int enic_poll(struct napi_struct *napi, int budget)
{
	struct enic *enic = container_of(napi, struct enic, napi);
	unsigned int rq_work_to_do = budget;
	unsigned int wq_work_to_do = -1; /* no limit */
	unsigned int  work_done, rq_work_done, wq_work_done;
1466
	int err;
1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489

	/* Service RQ (first) and WQ
	 */

	rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
		rq_work_to_do, enic_rq_service, NULL);

	wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
		wq_work_to_do, enic_wq_service, NULL);

	/* Accumulate intr event credits for this polling
	 * cycle.  An intr event is the completion of a
	 * a WQ or RQ packet.
	 */

	work_done = rq_work_done + wq_work_done;

	if (work_done > 0)
		vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ],
			work_done,
			0 /* don't unmask intr */,
			0 /* don't reset intr timer */);

1490
	err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
1491

1492 1493 1494
	/* Buffer allocation failed. Stay in polling
	 * mode so we can try to fill the ring again.
	 */
1495

1496 1497
	if (err)
		rq_work_done = rq_work_to_do;
1498

1499
	if (rq_work_done < rq_work_to_do) {
1500

1501
		/* Some work done, but not enough to stay in polling,
1502
		 * exit polling
1503 1504
		 */

1505
		napi_complete(napi);
1506
		vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
1507 1508 1509 1510 1511 1512 1513 1514 1515 1516
	}

	return rq_work_done;
}

static int enic_poll_msix(struct napi_struct *napi, int budget)
{
	struct enic *enic = container_of(napi, struct enic, napi);
	unsigned int work_to_do = budget;
	unsigned int work_done;
1517
	int err;
1518 1519 1520 1521 1522 1523 1524

	/* Service RQ
	 */

	work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
		work_to_do, enic_rq_service, NULL);

1525 1526 1527 1528
	/* Return intr event credits for this polling
	 * cycle.  An intr event is the completion of a
	 * RQ packet.
	 */
1529

1530
	if (work_done > 0)
1531 1532 1533 1534 1535
		vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ],
			work_done,
			0 /* don't unmask intr */,
			0 /* don't reset intr timer */);

1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547
	err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);

	/* Buffer allocation failed. Stay in polling mode
	 * so we can try to fill the ring again.
	 */

	if (err)
		work_done = work_to_do;

	if (work_done < work_to_do) {

		/* Some work done, but not enough to stay in polling,
1548
		 * exit polling
1549 1550
		 */

1551
		napi_complete(napi);
1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563
		vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
	}

	return work_done;
}

static void enic_notify_timer(unsigned long data)
{
	struct enic *enic = (struct enic *)data;

	enic_notify_check(enic);

1564 1565
	mod_timer(&enic->notify_timer,
		round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576
}

static void enic_free_intr(struct enic *enic)
{
	struct net_device *netdev = enic->netdev;
	unsigned int i;

	switch (vnic_dev_get_intr_mode(enic->vdev)) {
	case VNIC_DEV_INTR_MODE_INTX:
		free_irq(enic->pdev->irq, netdev);
		break;
1577 1578 1579
	case VNIC_DEV_INTR_MODE_MSI:
		free_irq(enic->pdev->irq, enic);
		break;
1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613
	case VNIC_DEV_INTR_MODE_MSIX:
		for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
			if (enic->msix[i].requested)
				free_irq(enic->msix_entry[i].vector,
					enic->msix[i].devid);
		break;
	default:
		break;
	}
}

static int enic_request_intr(struct enic *enic)
{
	struct net_device *netdev = enic->netdev;
	unsigned int i;
	int err = 0;

	switch (vnic_dev_get_intr_mode(enic->vdev)) {

	case VNIC_DEV_INTR_MODE_INTX:

		err = request_irq(enic->pdev->irq, enic_isr_legacy,
			IRQF_SHARED, netdev->name, netdev);
		break;

	case VNIC_DEV_INTR_MODE_MSI:

		err = request_irq(enic->pdev->irq, enic_isr_msi,
			0, netdev->name, enic);
		break;

	case VNIC_DEV_INTR_MODE_MSIX:

		sprintf(enic->msix[ENIC_MSIX_RQ].devname,
1614
			"%.11s-rx-0", netdev->name);
1615 1616 1617 1618
		enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq;
		enic->msix[ENIC_MSIX_RQ].devid = enic;

		sprintf(enic->msix[ENIC_MSIX_WQ].devname,
1619
			"%.11s-tx-0", netdev->name);
1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653
		enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq;
		enic->msix[ENIC_MSIX_WQ].devid = enic;

		sprintf(enic->msix[ENIC_MSIX_ERR].devname,
			"%.11s-err", netdev->name);
		enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err;
		enic->msix[ENIC_MSIX_ERR].devid = enic;

		sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname,
			"%.11s-notify", netdev->name);
		enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify;
		enic->msix[ENIC_MSIX_NOTIFY].devid = enic;

		for (i = 0; i < ARRAY_SIZE(enic->msix); i++) {
			err = request_irq(enic->msix_entry[i].vector,
				enic->msix[i].isr, 0,
				enic->msix[i].devname,
				enic->msix[i].devid);
			if (err) {
				enic_free_intr(enic);
				break;
			}
			enic->msix[i].requested = 1;
		}

		break;

	default:
		break;
	}

	return err;
}

1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671
static void enic_synchronize_irqs(struct enic *enic)
{
	unsigned int i;

	switch (vnic_dev_get_intr_mode(enic->vdev)) {
	case VNIC_DEV_INTR_MODE_INTX:
	case VNIC_DEV_INTR_MODE_MSI:
		synchronize_irq(enic->pdev->irq);
		break;
	case VNIC_DEV_INTR_MODE_MSIX:
		for (i = 0; i < enic->intr_count; i++)
			synchronize_irq(enic->msix_entry[i].vector);
		break;
	default:
		break;
	}
}

1672
static int enic_dev_notify_set(struct enic *enic)
1673 1674 1675
{
	int err;

1676
	spin_lock(&enic->devcmd_lock);
1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687
	switch (vnic_dev_get_intr_mode(enic->vdev)) {
	case VNIC_DEV_INTR_MODE_INTX:
		err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY);
		break;
	case VNIC_DEV_INTR_MODE_MSIX:
		err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY);
		break;
	default:
		err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
		break;
	}
1688
	spin_unlock(&enic->devcmd_lock);
1689 1690 1691 1692

	return err;
}

1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725
static int enic_dev_notify_unset(struct enic *enic)
{
	int err;

	spin_lock(&enic->devcmd_lock);
	err = vnic_dev_notify_unset(enic->vdev);
	spin_unlock(&enic->devcmd_lock);

	return err;
}

static int enic_dev_enable(struct enic *enic)
{
	int err;

	spin_lock(&enic->devcmd_lock);
	err = vnic_dev_enable(enic->vdev);
	spin_unlock(&enic->devcmd_lock);

	return err;
}

static int enic_dev_disable(struct enic *enic)
{
	int err;

	spin_lock(&enic->devcmd_lock);
	err = vnic_dev_disable(enic->vdev);
	spin_unlock(&enic->devcmd_lock);

	return err;
}

1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744
static void enic_notify_timer_start(struct enic *enic)
{
	switch (vnic_dev_get_intr_mode(enic->vdev)) {
	case VNIC_DEV_INTR_MODE_MSI:
		mod_timer(&enic->notify_timer, jiffies);
		break;
	default:
		/* Using intr for notification for INTx/MSI-X */
		break;
	};
}

/* rtnl lock is held, process context */
static int enic_open(struct net_device *netdev)
{
	struct enic *enic = netdev_priv(netdev);
	unsigned int i;
	int err;

1745 1746
	err = enic_request_intr(enic);
	if (err) {
1747
		netdev_err(netdev, "Unable to request irq.\n");
1748 1749 1750
		return err;
	}

1751
	err = enic_dev_notify_set(enic);
1752
	if (err) {
1753 1754
		netdev_err(netdev,
			"Failed to alloc notify buffer, aborting.\n");
1755 1756 1757
		goto err_out_free_intr;
	}

1758
	for (i = 0; i < enic->rq_count; i++) {
1759 1760 1761
		vnic_rq_fill(&enic->rq[i], enic->rq_alloc_buf);
		/* Need at least one buffer on ring to get going */
		if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1762
			netdev_err(netdev, "Unable to alloc receive buffers\n");
1763
			err = -ENOMEM;
1764
			goto err_out_notify_unset;
1765 1766 1767 1768 1769 1770 1771 1772
		}
	}

	for (i = 0; i < enic->wq_count; i++)
		vnic_wq_enable(&enic->wq[i]);
	for (i = 0; i < enic->rq_count; i++)
		vnic_rq_enable(&enic->rq[i]);

1773
	enic_dev_add_station_addr(enic);
1774 1775 1776 1777
	enic_set_multicast_list(netdev);

	netif_wake_queue(netdev);
	napi_enable(&enic->napi);
1778
	enic_dev_enable(enic);
1779 1780 1781 1782 1783 1784 1785

	for (i = 0; i < enic->intr_count; i++)
		vnic_intr_unmask(&enic->intr[i]);

	enic_notify_timer_start(enic);

	return 0;
1786 1787

err_out_notify_unset:
1788
	enic_dev_notify_unset(enic);
1789 1790 1791 1792
err_out_free_intr:
	enic_free_intr(enic);

	return err;
1793 1794 1795 1796 1797 1798 1799 1800 1801
}

/* rtnl lock is held, process context */
static int enic_stop(struct net_device *netdev)
{
	struct enic *enic = netdev_priv(netdev);
	unsigned int i;
	int err;

1802 1803 1804 1805 1806
	for (i = 0; i < enic->intr_count; i++)
		vnic_intr_mask(&enic->intr[i]);

	enic_synchronize_irqs(enic);

1807 1808
	del_timer_sync(&enic->notify_timer);

1809
	enic_dev_disable(enic);
1810
	napi_disable(&enic->napi);
1811 1812
	netif_carrier_off(netdev);
	netif_tx_disable(netdev);
1813

1814 1815
	enic_dev_del_station_addr(enic);

1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826
	for (i = 0; i < enic->wq_count; i++) {
		err = vnic_wq_disable(&enic->wq[i]);
		if (err)
			return err;
	}
	for (i = 0; i < enic->rq_count; i++) {
		err = vnic_rq_disable(&enic->rq[i]);
		if (err)
			return err;
	}

1827
	enic_dev_notify_unset(enic);
1828 1829
	enic_free_intr(enic);

1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846
	for (i = 0; i < enic->wq_count; i++)
		vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
	for (i = 0; i < enic->rq_count; i++)
		vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
	for (i = 0; i < enic->cq_count; i++)
		vnic_cq_clean(&enic->cq[i]);
	for (i = 0; i < enic->intr_count; i++)
		vnic_intr_clean(&enic->intr[i]);

	return 0;
}

static int enic_change_mtu(struct net_device *netdev, int new_mtu)
{
	struct enic *enic = netdev_priv(netdev);
	int running = netif_running(netdev);

1847 1848 1849
	if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
		return -EINVAL;

1850 1851 1852 1853 1854 1855
	if (running)
		enic_stop(netdev);

	netdev->mtu = new_mtu;

	if (netdev->mtu > enic->port_mtu)
1856 1857 1858
		netdev_warn(netdev,
			"interface MTU (%d) set higher than port MTU (%d)\n",
			netdev->mtu, enic->port_mtu);
1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930

	if (running)
		enic_open(netdev);

	return 0;
}

#ifdef CONFIG_NET_POLL_CONTROLLER
static void enic_poll_controller(struct net_device *netdev)
{
	struct enic *enic = netdev_priv(netdev);
	struct vnic_dev *vdev = enic->vdev;

	switch (vnic_dev_get_intr_mode(vdev)) {
	case VNIC_DEV_INTR_MODE_MSIX:
		enic_isr_msix_rq(enic->pdev->irq, enic);
		enic_isr_msix_wq(enic->pdev->irq, enic);
		break;
	case VNIC_DEV_INTR_MODE_MSI:
		enic_isr_msi(enic->pdev->irq, enic);
		break;
	case VNIC_DEV_INTR_MODE_INTX:
		enic_isr_legacy(enic->pdev->irq, netdev);
		break;
	default:
		break;
	}
}
#endif

static int enic_dev_wait(struct vnic_dev *vdev,
	int (*start)(struct vnic_dev *, int),
	int (*finished)(struct vnic_dev *, int *),
	int arg)
{
	unsigned long time;
	int done;
	int err;

	BUG_ON(in_interrupt());

	err = start(vdev, arg);
	if (err)
		return err;

	/* Wait for func to complete...2 seconds max
	 */

	time = jiffies + (HZ * 2);
	do {

		err = finished(vdev, &done);
		if (err)
			return err;

		if (done)
			return 0;

		schedule_timeout_uninterruptible(HZ / 10);

	} while (time_after(time, jiffies));

	return -ETIMEDOUT;
}

static int enic_dev_open(struct enic *enic)
{
	int err;

	err = enic_dev_wait(enic->vdev, vnic_dev_open,
		vnic_dev_open_done, 0);
	if (err)
1931 1932
		dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
			err);
1933 1934 1935 1936

	return err;
}

1937
static int enic_dev_hang_reset(struct enic *enic)
1938 1939 1940
{
	int err;

1941 1942
	err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
		vnic_dev_hang_reset_done, 0);
1943
	if (err)
1944 1945
		netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
			err);
1946 1947 1948 1949

	return err;
}

1950 1951 1952 1953 1954 1955 1956 1957 1958
static int enic_set_niccfg(struct enic *enic)
{
	const u8 rss_default_cpu = 0;
	const u8 rss_hash_type = 0;
	const u8 rss_hash_bits = 0;
	const u8 rss_base_cpu = 0;
	const u8 rss_enable = 0;
	const u8 tso_ipid_split_en = 0;
	const u8 ig_vlan_strip_en = 1;
1959
	int err;
1960 1961

	/* Enable VLAN tag stripping.  RSS not enabled (yet).
1962
	 */
1963

1964 1965
	spin_lock(&enic->devcmd_lock);
	err = enic_set_nic_cfg(enic,
1966 1967 1968 1969
		rss_default_cpu, rss_hash_type,
		rss_hash_bits, rss_base_cpu,
		rss_enable, tso_ipid_split_en,
		ig_vlan_strip_en);
1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983
	spin_unlock(&enic->devcmd_lock);

	return err;
}

static int enic_dev_hang_notify(struct enic *enic)
{
	int err;

	spin_lock(&enic->devcmd_lock);
	err = vnic_dev_hang_notify(enic->vdev);
	spin_unlock(&enic->devcmd_lock);

	return err;
1984 1985
}

1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997
int enic_dev_set_ig_vlan_rewrite_mode(struct enic *enic)
{
	int err;

	spin_lock(&enic->devcmd_lock);
	err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev,
		IG_VLAN_REWRITE_MODE_PRIORITY_TAG_DEFAULT_VLAN);
	spin_unlock(&enic->devcmd_lock);

	return err;
}

1998 1999 2000 2001 2002 2003 2004 2005 2006
static void enic_reset(struct work_struct *work)
{
	struct enic *enic = container_of(work, struct enic, reset);

	if (!netif_running(enic->netdev))
		return;

	rtnl_lock();

2007
	enic_dev_hang_notify(enic);
2008
	enic_stop(enic->netdev);
2009 2010
	enic_dev_hang_reset(enic);
	enic_reset_multicast_list(enic);
2011
	enic_init_vnic_resources(enic);
2012
	enic_set_niccfg(enic);
2013
	enic_dev_set_ig_vlan_rewrite_mode(enic);
2014 2015 2016 2017 2018 2019 2020
	enic_open(enic->netdev);

	rtnl_unlock();
}

static int enic_set_intr_mode(struct enic *enic)
{
2021 2022
	unsigned int n = 1;
	unsigned int m = 1;
2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122
	unsigned int i;

	/* Set interrupt mode (INTx, MSI, MSI-X) depending
	 * system capabilities.
	 *
	 * Try MSI-X first
	 *
	 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
	 * (the second to last INTR is used for WQ/RQ errors)
	 * (the last INTR is used for notifications)
	 */

	BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
	for (i = 0; i < n + m + 2; i++)
		enic->msix_entry[i].entry = i;

	if (enic->config.intr_mode < 1 &&
	    enic->rq_count >= n &&
	    enic->wq_count >= m &&
	    enic->cq_count >= n + m &&
	    enic->intr_count >= n + m + 2 &&
	    !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {

		enic->rq_count = n;
		enic->wq_count = m;
		enic->cq_count = n + m;
		enic->intr_count = n + m + 2;

		vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX);

		return 0;
	}

	/* Next try MSI
	 *
	 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
	 */

	if (enic->config.intr_mode < 2 &&
	    enic->rq_count >= 1 &&
	    enic->wq_count >= 1 &&
	    enic->cq_count >= 2 &&
	    enic->intr_count >= 1 &&
	    !pci_enable_msi(enic->pdev)) {

		enic->rq_count = 1;
		enic->wq_count = 1;
		enic->cq_count = 2;
		enic->intr_count = 1;

		vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);

		return 0;
	}

	/* Next try INTx
	 *
	 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
	 * (the first INTR is used for WQ/RQ)
	 * (the second INTR is used for WQ/RQ errors)
	 * (the last INTR is used for notifications)
	 */

	if (enic->config.intr_mode < 3 &&
	    enic->rq_count >= 1 &&
	    enic->wq_count >= 1 &&
	    enic->cq_count >= 2 &&
	    enic->intr_count >= 3) {

		enic->rq_count = 1;
		enic->wq_count = 1;
		enic->cq_count = 2;
		enic->intr_count = 3;

		vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);

		return 0;
	}

	vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);

	return -EINVAL;
}

static void enic_clear_intr_mode(struct enic *enic)
{
	switch (vnic_dev_get_intr_mode(enic->vdev)) {
	case VNIC_DEV_INTR_MODE_MSIX:
		pci_disable_msix(enic->pdev);
		break;
	case VNIC_DEV_INTR_MODE_MSI:
		pci_disable_msi(enic->pdev);
		break;
	default:
		break;
	}

	vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
}

2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142
static const struct net_device_ops enic_netdev_dynamic_ops = {
	.ndo_open		= enic_open,
	.ndo_stop		= enic_stop,
	.ndo_start_xmit		= enic_hard_start_xmit,
	.ndo_get_stats		= enic_get_stats,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_multicast_list	= enic_set_multicast_list,
	.ndo_set_mac_address	= enic_set_mac_address_dynamic,
	.ndo_change_mtu		= enic_change_mtu,
	.ndo_vlan_rx_register	= enic_vlan_rx_register,
	.ndo_vlan_rx_add_vid	= enic_vlan_rx_add_vid,
	.ndo_vlan_rx_kill_vid	= enic_vlan_rx_kill_vid,
	.ndo_tx_timeout		= enic_tx_timeout,
	.ndo_set_vf_port	= enic_set_vf_port,
	.ndo_get_vf_port	= enic_get_vf_port,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= enic_poll_controller,
#endif
};

2143 2144 2145
static const struct net_device_ops enic_netdev_ops = {
	.ndo_open		= enic_open,
	.ndo_stop		= enic_stop,
2146
	.ndo_start_xmit		= enic_hard_start_xmit,
2147 2148
	.ndo_get_stats		= enic_get_stats,
	.ndo_validate_addr	= eth_validate_addr,
2149
	.ndo_set_mac_address	= enic_set_mac_address,
2150
	.ndo_set_multicast_list	= enic_set_multicast_list,
2151 2152 2153 2154 2155 2156 2157 2158 2159 2160
	.ndo_change_mtu		= enic_change_mtu,
	.ndo_vlan_rx_register	= enic_vlan_rx_register,
	.ndo_vlan_rx_add_vid	= enic_vlan_rx_add_vid,
	.ndo_vlan_rx_kill_vid	= enic_vlan_rx_kill_vid,
	.ndo_tx_timeout		= enic_tx_timeout,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= enic_poll_controller,
#endif
};

2161 2162 2163 2164 2165 2166 2167
void enic_dev_deinit(struct enic *enic)
{
	netif_napi_del(&enic->napi);
	enic_free_vnic_resources(enic);
	enic_clear_intr_mode(enic);
}

2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178
static int enic_dev_stats_clear(struct enic *enic)
{
	int err;

	spin_lock(&enic->devcmd_lock);
	err = vnic_dev_stats_clear(enic->vdev);
	spin_unlock(&enic->devcmd_lock);

	return err;
}

2179 2180
int enic_dev_init(struct enic *enic)
{
2181
	struct device *dev = enic_get_dev(enic);
2182 2183 2184 2185 2186 2187 2188 2189
	struct net_device *netdev = enic->netdev;
	int err;

	/* Get vNIC configuration
	 */

	err = enic_get_vnic_config(enic);
	if (err) {
2190
		dev_err(dev, "Get vNIC configuration failed, aborting\n");
2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204
		return err;
	}

	/* Get available resource counts
	 */

	enic_get_res_counts(enic);

	/* Set interrupt mode based on resource counts and system
	 * capabilities
	 */

	err = enic_set_intr_mode(enic);
	if (err) {
2205 2206
		dev_err(dev, "Failed to set intr mode based on resource "
			"counts and system capabilities, aborting\n");
2207 2208 2209 2210 2211 2212 2213 2214
		return err;
	}

	/* Allocate and configure vNIC resources
	 */

	err = enic_alloc_vnic_resources(enic);
	if (err) {
2215
		dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2216 2217 2218 2219 2220
		goto err_out_free_vnic_resources;
	}

	enic_init_vnic_resources(enic);

2221 2222 2223 2224
	/* Clear LIF stats
	 */
	enic_dev_stats_clear(enic);

2225 2226
	err = enic_set_rq_alloc_buf(enic);
	if (err) {
2227
		dev_err(dev, "Failed to set RQ buffer allocator, aborting\n");
2228 2229 2230 2231 2232
		goto err_out_free_vnic_resources;
	}

	err = enic_set_niccfg(enic);
	if (err) {
2233
		dev_err(dev, "Failed to config nic, aborting\n");
2234 2235 2236
		goto err_out_free_vnic_resources;
	}

2237 2238
	err = enic_dev_set_ig_vlan_rewrite_mode(enic);
	if (err) {
2239
		netdev_err(netdev,
2240 2241 2242 2243
			"Failed to set ingress vlan rewrite mode, aborting.\n");
		goto err_out_free_vnic_resources;
	}

2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261
	switch (vnic_dev_get_intr_mode(enic->vdev)) {
	default:
		netif_napi_add(netdev, &enic->napi, enic_poll, 64);
		break;
	case VNIC_DEV_INTR_MODE_MSIX:
		netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64);
		break;
	}

	return 0;

err_out_free_vnic_resources:
	enic_clear_intr_mode(enic);
	enic_free_vnic_resources(enic);

	return err;
}

2262 2263 2264 2265 2266 2267 2268 2269 2270
static void enic_iounmap(struct enic *enic)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
		if (enic->bar[i].vaddr)
			iounmap(enic->bar[i].vaddr);
}

2271 2272 2273
static int __devinit enic_probe(struct pci_dev *pdev,
	const struct pci_device_id *ent)
{
2274
	struct device *dev = &pdev->dev;
2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286
	struct net_device *netdev;
	struct enic *enic;
	int using_dac = 0;
	unsigned int i;
	int err;

	/* Allocate net device structure and initialize.  Private
	 * instance data is initialized to zero.
	 */

	netdev = alloc_etherdev(sizeof(struct enic));
	if (!netdev) {
2287
		pr_err("Etherdev alloc failed, aborting\n");
2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303
		return -ENOMEM;
	}

	pci_set_drvdata(pdev, netdev);

	SET_NETDEV_DEV(netdev, &pdev->dev);

	enic = netdev_priv(netdev);
	enic->netdev = netdev;
	enic->pdev = pdev;

	/* Setup PCI resources
	 */

	err = pci_enable_device(pdev);
	if (err) {
2304
		dev_err(dev, "Cannot enable PCI device, aborting\n");
2305 2306 2307 2308 2309
		goto err_out_free_netdev;
	}

	err = pci_request_regions(pdev, DRV_NAME);
	if (err) {
2310
		dev_err(dev, "Cannot request PCI regions, aborting\n");
2311 2312 2313 2314 2315 2316 2317 2318 2319 2320
		goto err_out_disable_device;
	}

	pci_set_master(pdev);

	/* Query PCI controller on system for DMA addressing
	 * limitation for the device.  Try 40-bit first, and
	 * fail to 32-bit.
	 */

2321
	err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2322
	if (err) {
2323
		err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2324
		if (err) {
2325
			dev_err(dev, "No usable DMA configuration, aborting\n");
2326 2327
			goto err_out_release_regions;
		}
2328
		err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2329
		if (err) {
2330 2331
			dev_err(dev, "Unable to obtain %u-bit DMA "
				"for consistent allocations, aborting\n", 32);
2332 2333 2334
			goto err_out_release_regions;
		}
	} else {
2335
		err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2336
		if (err) {
2337 2338
			dev_err(dev, "Unable to obtain %u-bit DMA "
				"for consistent allocations, aborting\n", 40);
2339 2340 2341 2342 2343
			goto err_out_release_regions;
		}
		using_dac = 1;
	}

2344
	/* Map vNIC resources from BAR0-5
2345 2346
	 */

2347 2348 2349 2350 2351 2352
	for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
		if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
			continue;
		enic->bar[i].len = pci_resource_len(pdev, i);
		enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
		if (!enic->bar[i].vaddr) {
2353
			dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2354 2355 2356 2357
			err = -ENODEV;
			goto err_out_iounmap;
		}
		enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2358 2359 2360 2361 2362
	}

	/* Register vNIC device
	 */

2363 2364
	enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
		ARRAY_SIZE(enic->bar));
2365
	if (!enic->vdev) {
2366
		dev_err(dev, "vNIC registration failed, aborting\n");
2367 2368 2369 2370 2371 2372 2373 2374 2375
		err = -ENODEV;
		goto err_out_iounmap;
	}

	/* Issue device open to get device in known state
	 */

	err = enic_dev_open(enic);
	if (err) {
2376
		dev_err(dev, "vNIC dev open failed, aborting\n");
2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389
		goto err_out_vnic_unregister;
	}

	/* Issue device init to initialize the vnic-to-switch link.
	 * We'll start with carrier off and wait for link UP
	 * notification later to turn on carrier.  We don't need
	 * to wait here for the vnic-to-switch link initialization
	 * to complete; link UP notification is the indication that
	 * the process is complete.
	 */

	netif_carrier_off(netdev);

2390 2391 2392 2393 2394
	/* Do not call dev_init for a dynamic vnic.
	 * For a dynamic vnic, init_prov_info will be
	 * called later by an upper layer.
	 */

2395 2396 2397
	if (!enic_is_dynamic(enic)) {
		err = vnic_dev_init(enic->vdev, 0);
		if (err) {
2398
			dev_err(dev, "vNIC dev init failed, aborting\n");
2399 2400
			goto err_out_dev_close;
		}
2401 2402
	}

2403 2404 2405 2406 2407
	/* Setup devcmd lock
	 */

	spin_lock_init(&enic->devcmd_lock);

2408
	err = enic_dev_init(enic);
2409
	if (err) {
2410
		dev_err(dev, "Device initialization failed, aborting\n");
2411 2412 2413
		goto err_out_dev_close;
	}

2414
	/* Setup notification timer, HW reset task, and wq locks
2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433
	 */

	init_timer(&enic->notify_timer);
	enic->notify_timer.function = enic_notify_timer;
	enic->notify_timer.data = (unsigned long)enic;

	INIT_WORK(&enic->reset, enic_reset);

	for (i = 0; i < enic->wq_count; i++)
		spin_lock_init(&enic->wq_lock[i]);

	/* Register net device
	 */

	enic->port_mtu = enic->config.mtu;
	(void)enic_change_mtu(netdev, enic->port_mtu);

	err = enic_set_mac_addr(netdev, enic->mac_addr);
	if (err) {
2434
		dev_err(dev, "Invalid MAC address, aborting\n");
2435
		goto err_out_dev_deinit;
2436 2437
	}

2438 2439 2440
	enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
	enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;

2441 2442 2443 2444 2445
	if (enic_is_dynamic(enic))
		netdev->netdev_ops = &enic_netdev_dynamic_ops;
	else
		netdev->netdev_ops = &enic_netdev_ops;

2446 2447 2448
	netdev->watchdog_timeo = 2 * HZ;
	netdev->ethtool_ops = &enic_ethtool_ops;

2449
	netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2450 2451 2452 2453 2454 2455
	if (ENIC_SETTING(enic, LOOP)) {
		netdev->features &= ~NETIF_F_HW_VLAN_TX;
		enic->loop_enable = 1;
		enic->loop_tag = enic->config.loop_tag;
		dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
	}
2456 2457 2458 2459 2460
	if (ENIC_SETTING(enic, TXCSUM))
		netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
	if (ENIC_SETTING(enic, TSO))
		netdev->features |= NETIF_F_TSO |
			NETIF_F_TSO6 | NETIF_F_TSO_ECN;
S
Scott Feldman 已提交
2461
	if (ENIC_SETTING(enic, LRO))
2462
		netdev->features |= NETIF_F_GRO;
2463 2464 2465 2466 2467 2468 2469
	if (using_dac)
		netdev->features |= NETIF_F_HIGHDMA;

	enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);

	err = register_netdev(netdev);
	if (err) {
2470
		dev_err(dev, "Cannot register net device, aborting\n");
2471
		goto err_out_dev_deinit;
2472 2473 2474 2475
	}

	return 0;

2476 2477
err_out_dev_deinit:
	enic_dev_deinit(enic);
2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503
err_out_dev_close:
	vnic_dev_close(enic->vdev);
err_out_vnic_unregister:
	vnic_dev_unregister(enic->vdev);
err_out_iounmap:
	enic_iounmap(enic);
err_out_release_regions:
	pci_release_regions(pdev);
err_out_disable_device:
	pci_disable_device(pdev);
err_out_free_netdev:
	pci_set_drvdata(pdev, NULL);
	free_netdev(netdev);

	return err;
}

static void __devexit enic_remove(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);

	if (netdev) {
		struct enic *enic = netdev_priv(netdev);

		flush_scheduled_work();
		unregister_netdev(netdev);
2504
		enic_dev_deinit(enic);
2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523
		vnic_dev_close(enic->vdev);
		vnic_dev_unregister(enic->vdev);
		enic_iounmap(enic);
		pci_release_regions(pdev);
		pci_disable_device(pdev);
		pci_set_drvdata(pdev, NULL);
		free_netdev(netdev);
	}
}

static struct pci_driver enic_driver = {
	.name = DRV_NAME,
	.id_table = enic_id_table,
	.probe = enic_probe,
	.remove = __devexit_p(enic_remove),
};

static int __init enic_init_module(void)
{
2524
	pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535

	return pci_register_driver(&enic_driver);
}

static void __exit enic_cleanup_module(void)
{
	pci_unregister_driver(&enic_driver);
}

module_init(enic_init_module);
module_exit(enic_cleanup_module);