text: /*
   * Copyright 2008-2010 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/interrupt.h>
  #include <linux/workqueue.h>
  #include <linux/pci.h>
  #include <linux/netdevice.h>
  #include <linux/etherdevice.h>
  #include <linux/if.h>
  #include <linux/if_ether.h>
  #include <linux/if_vlan.h>
  #include <linux/in.h>
  #include <linux/ip.h>
  #include <linux/ipv6.h>
  #include <linux/tcp.h>
  #include <linux/rtnetlink.h>
  #include <linux/prefetch.h>
  #include <net/ip6_checksum.h>
  
  #include "cq_enet_desc.h"
  #include "vnic_dev.h"
  #include "vnic_intr.h"
  #include "vnic_stats.h"
  #include "vnic_vic.h"
  #include "enic_res.h"
  #include "enic.h"
  #include "enic_dev.h"
  #include "enic_pp.h"
  
  #define ENIC_NOTIFY_TIMER_PERIOD	(2 * HZ)
  #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 */
  #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN     0x0044  /* enet dynamic vnic */
  #define PCI_DEVICE_ID_CISCO_VIC_ENET_VF      0x0071  /* enet SRIOV VF */
  
  /* Supported devices */
  static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
  	{ PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
  	{ PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
  	{ PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) },
  	{ 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);
  
  int enic_is_dynamic(struct enic *enic)
  {
  	return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
  }
  
  int enic_sriov_enabled(struct enic *enic)
  {
  	return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0;
  }
  
  static int enic_is_sriov_vf(struct enic *enic)
  {
  	return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
  }
  
  int enic_is_valid_vf(struct enic *enic, int vf)
  {
  #ifdef CONFIG_PCI_IOV
  	return vf >= 0 && vf < enic->num_vfs;
  #else
  	return 0;
  #endif
  }
  
  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_tx_queue_stopped(netdev_get_tx_queue(enic->netdev, q_number)) &&
  	    vnic_wq_desc_avail(&enic->wq[q_number]) >=
  	    (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
  		netif_wake_subqueue(enic->netdev, q_number);
  
  	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)
  			netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
  				i, error_status);
  	}
  
  	for (i = 0; i < enic->rq_count; i++) {
  		error_status = vnic_rq_error_status(&enic->rq[i]);
  		if (error_status)
  			netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
  				i, error_status);
  	}
  }
  
  static void enic_msglvl_check(struct enic *enic)
  {
  	u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
  
  	if (msg_enable != enic->msg_enable) {
  		netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
  			enic->msg_enable, msg_enable);
  		enic->msg_enable = msg_enable;
  	}
  }
  
  static void enic_mtu_check(struct enic *enic)
  {
  	u32 mtu = vnic_dev_mtu(enic->vdev);
  	struct net_device *netdev = enic->netdev;
  
  	if (mtu && mtu != enic->port_mtu) {
  		enic->port_mtu = mtu;
  		if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
  			mtu = max_t(int, ENIC_MIN_MTU,
  				min_t(int, ENIC_MAX_MTU, mtu));
  			if (mtu != netdev->mtu)
  				schedule_work(&enic->change_mtu_work);
  		} else {
  			if (mtu < netdev->mtu)
  				netdev_warn(netdev,
  					"interface MTU (%d) set higher "
  					"than switch port MTU (%d)\n",
  					netdev->mtu, mtu);
  		}
  	}
  }
  
  static void enic_link_check(struct enic *enic)
  {
  	int link_status = vnic_dev_link_status(enic->vdev);
  	int carrier_ok = netif_carrier_ok(enic->netdev);
  
  	if (link_status && !carrier_ok) {
  		netdev_info(enic->netdev, "Link UP\n");
  		netif_carrier_on(enic->netdev);
  	} else if (!link_status && carrier_ok) {
  		netdev_info(enic->netdev, "Link DOWN\n");
  		netif_carrier_off(enic->netdev);
  	}
  }
  
  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);
  	unsigned int io_intr = enic_legacy_io_intr();
  	unsigned int err_intr = enic_legacy_err_intr();
  	unsigned int notify_intr = enic_legacy_notify_intr();
  	u32 pba;
  
  	vnic_intr_mask(&enic->intr[io_intr]);
  
  	pba = vnic_intr_legacy_pba(enic->legacy_pba);
  	if (!pba) {
  		vnic_intr_unmask(&enic->intr[io_intr]);
  		return IRQ_NONE;	/* not our interrupt */
  	}
  
  	if (ENIC_TEST_INTR(pba, notify_intr)) {
  		vnic_intr_return_all_credits(&enic->intr[notify_intr]);
  		enic_notify_check(enic);
  	}
  
  	if (ENIC_TEST_INTR(pba, err_intr)) {
  		vnic_intr_return_all_credits(&enic->intr[err_intr]);
  		enic_log_q_error(enic);
  		/* schedule recovery from WQ/RQ error */
  		schedule_work(&enic->reset);
  		return IRQ_HANDLED;
  	}
  
  	if (ENIC_TEST_INTR(pba, io_intr)) {
  		if (napi_schedule_prep(&enic->napi[0]))
  			__napi_schedule(&enic->napi[0]);
  	} else {
  		vnic_intr_unmask(&enic->intr[io_intr]);
  	}
  
  	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).
  	 */
  
  	napi_schedule(&enic->napi[0]);
  
  	return IRQ_HANDLED;
  }
  
  static irqreturn_t enic_isr_msix_rq(int irq, void *data)
  {
  	struct napi_struct *napi = data;
  
  	/* schedule NAPI polling for RQ cleanup */
  	napi_schedule(napi);
  
  	return IRQ_HANDLED;
  }
  
  static irqreturn_t enic_isr_msix_wq(int irq, void *data)
  {
  	struct enic *enic = data;
  	unsigned int cq;
  	unsigned int intr;
  	unsigned int wq_work_to_do = -1; /* no limit */
  	unsigned int wq_work_done;
  	unsigned int wq_irq;
  
  	wq_irq = (u32)irq - enic->msix_entry[enic_msix_wq_intr(enic, 0)].vector;
  	cq = enic_cq_wq(enic, wq_irq);
  	intr = enic_msix_wq_intr(enic, wq_irq);
  
  	wq_work_done = vnic_cq_service(&enic->cq[cq],
  		wq_work_to_do, enic_wq_service, NULL);
  
  	vnic_intr_return_credits(&enic->intr[intr],
  		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;
  	unsigned int intr = enic_msix_err_intr(enic);
  
  	vnic_intr_return_all_credits(&enic->intr[intr]);
  
  	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;
  	unsigned int intr = enic_msix_notify_intr(enic);
  
  	vnic_intr_return_all_credits(&enic->intr[intr]);
  	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,
  	unsigned int len_left, int loopback)
  {
  	const skb_frag_t *frag;
  
  	/* Queue additional data fragments */
  	for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
  		len_left -= skb_frag_size(frag);
  		enic_queue_wq_desc_cont(wq, skb,
  			skb_frag_dma_map(&enic->pdev->dev,
  					 frag, 0, skb_frag_size(frag),
  					 DMA_TO_DEVICE),
  			skb_frag_size(frag),
  			(len_left == 0),	/* EOP? */
  			loopback);
  	}
  }
  
  static inline void enic_queue_wq_skb_vlan(struct enic *enic,
  	struct vnic_wq *wq, struct sk_buff *skb,
  	int vlan_tag_insert, unsigned int vlan_tag, int loopback)
  {
  	unsigned int head_len = skb_headlen(skb);
  	unsigned int len_left = skb->len - head_len;
  	int eop = (len_left == 0);
  
  	/* 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.
  	 */
  	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,
  		eop, loopback);
  
  	if (!eop)
  		enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
  }
  
  static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
  	struct vnic_wq *wq, struct sk_buff *skb,
  	int vlan_tag_insert, unsigned int vlan_tag, int loopback)
  {
  	unsigned int head_len = skb_headlen(skb);
  	unsigned int len_left = skb->len - head_len;
  	unsigned int hdr_len = skb_checksum_start_offset(skb);
  	unsigned int csum_offset = hdr_len + skb->csum_offset;
  	int eop = (len_left == 0);
  
  	/* 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.
  	 */
  	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,
  		eop, loopback);
  
  	if (!eop)
  		enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
  }
  
  static inline void enic_queue_wq_skb_tso(struct enic *enic,
  	struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
  	int vlan_tag_insert, unsigned int vlan_tag, int loopback)
  {
  	unsigned int frag_len_left = skb_headlen(skb);
  	unsigned int len_left = skb->len - frag_len_left;
  	unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
  	int eop = (len_left == 0);
  	unsigned int len;
  	dma_addr_t dma_addr;
  	unsigned int offset = 0;
  	skb_frag_t *frag;
  
  	/* 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.
  	 */
  
  	if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
  		ip_hdr(skb)->check = 0;
  		tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
  			ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
  	} else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
  		tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
  			&ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
  	}
  
  	/* 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,
  			eop && (len == frag_len_left), loopback);
  		frag_len_left -= len;
  		offset += len;
  	}
  
  	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 -= skb_frag_size(frag);
  		frag_len_left = skb_frag_size(frag);
  		offset = 0;
  
  		while (frag_len_left) {
  			len = min(frag_len_left,
  				(unsigned int)WQ_ENET_MAX_DESC_LEN);
  			dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag,
  						    offset, len,
  						    DMA_TO_DEVICE);
  			enic_queue_wq_desc_cont(wq, skb,
  				dma_addr,
  				len,
  				(len_left == 0) &&
  				(len == frag_len_left),		/* EOP? */
  				loopback);
  			frag_len_left -= len;
  			offset += len;
  		}
  	}
  }
  
  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;
  	int loopback = 0;
  
  	if (vlan_tx_tag_present(skb)) {
  		/* VLAN tag from trunking driver */
  		vlan_tag_insert = 1;
  		vlan_tag = vlan_tx_tag_get(skb);
  	} else if (enic->loop_enable) {
  		vlan_tag = enic->loop_tag;
  		loopback = 1;
  	}
  
  	if (mss)
  		enic_queue_wq_skb_tso(enic, wq, skb, mss,
  			vlan_tag_insert, vlan_tag, loopback);
  	else if	(skb->ip_summed == CHECKSUM_PARTIAL)
  		enic_queue_wq_skb_csum_l4(enic, wq, skb,
  			vlan_tag_insert, vlan_tag, loopback);
  	else
  		enic_queue_wq_skb_vlan(enic, wq, skb,
  			vlan_tag_insert, vlan_tag, loopback);
  }
  
  /* netif_tx_lock held, process context with BHs disabled, or BH */
  static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
  	struct net_device *netdev)
  {
  	struct enic *enic = netdev_priv(netdev);
  	struct vnic_wq *wq;
  	unsigned long flags;
  	unsigned int txq_map;
  
  	if (skb->len <= 0) {
  		dev_kfree_skb(skb);
  		return NETDEV_TX_OK;
  	}
  
  	txq_map = skb_get_queue_mapping(skb) % enic->wq_count;
  	wq = &enic->wq[txq_map];
  
  	/* 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[txq_map], flags);
  
  	if (vnic_wq_desc_avail(wq) <
  	    skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
  		netif_tx_stop_queue(netdev_get_tx_queue(netdev, txq_map));
  		/* This is a hard error, log it */
  		netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
  		spin_unlock_irqrestore(&enic->wq_lock[txq_map], flags);
  		return NETDEV_TX_BUSY;
  	}
  
  	enic_queue_wq_skb(enic, wq, skb);
  
  	if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
  		netif_tx_stop_queue(netdev_get_tx_queue(netdev, txq_map));
  
  	spin_unlock_irqrestore(&enic->wq_lock[txq_map], flags);
  
  	return NETDEV_TX_OK;
  }
  
  /* dev_base_lock rwlock held, nominally process context */
  static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev,
  						struct rtnl_link_stats64 *net_stats)
  {
  	struct enic *enic = netdev_priv(netdev);
  	struct vnic_stats *stats;
  
  	enic_dev_stats_dump(enic, &stats);
  
  	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;
  
  	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;
  	net_stats->rx_over_errors = enic->rq_truncated_pkts;
  	net_stats->rx_crc_errors = enic->rq_bad_fcs;
  	net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
  
  	return net_stats;
  }
  
  void enic_reset_addr_lists(struct enic *enic)
  {
  	enic->mc_count = 0;
  	enic->uc_count = 0;
  	enic->flags = 0;
  }
  
  static int enic_set_mac_addr(struct net_device *netdev, char *addr)
  {
  	struct enic *enic = netdev_priv(netdev);
  
  	if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
  		if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
  			return -EADDRNOTAVAIL;
  	} else {
  		if (!is_valid_ether_addr(addr))
  			return -EADDRNOTAVAIL;
  	}
  
  	memcpy(netdev->dev_addr, addr, netdev->addr_len);
  
  	return 0;
  }
  
  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)
  {
  	struct sockaddr *saddr = p;
  	char *addr = saddr->sa_data;
  	struct enic *enic = netdev_priv(netdev);
  	int err;
  
  	err = enic_dev_del_station_addr(enic);
  	if (err)
  		return err;
  
  	err = enic_set_mac_addr(netdev, addr);
  	if (err)
  		return err;
  
  	return enic_dev_add_station_addr(enic);
  }
  
  static void enic_update_multicast_addr_list(struct enic *enic)
  {
  	struct net_device *netdev = enic->netdev;
  	struct netdev_hw_addr *ha;
  	unsigned int mc_count = netdev_mc_count(netdev);
  	u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
  	unsigned int i, j;
  
  	if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) {
  		netdev_warn(netdev, "Registering only %d out of %d "
  			"multicast addresses\n",
  			ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
  		mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
  	}
  
  	/* 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.
  	 */
  
  	i = 0;
  	netdev_for_each_mc_addr(ha, netdev) {
  		if (i == mc_count)
  			break;
  		memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
  	}
  
  	for (i = 0; i < enic->mc_count; i++) {
  		for (j = 0; j < mc_count; j++)
  			if (ether_addr_equal(enic->mc_addr[i], mc_addr[j]))
  				break;
  		if (j == mc_count)
  			enic_dev_del_addr(enic, enic->mc_addr[i]);
  	}
  
  	for (i = 0; i < mc_count; i++) {
  		for (j = 0; j < enic->mc_count; j++)
  			if (ether_addr_equal(mc_addr[i], enic->mc_addr[j]))
  				break;
  		if (j == enic->mc_count)
  			enic_dev_add_addr(enic, mc_addr[i]);
  	}
  
  	/* 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;
  }
  
  static void enic_update_unicast_addr_list(struct enic *enic)
  {
  	struct net_device *netdev = enic->netdev;
  	struct netdev_hw_addr *ha;
  	unsigned int uc_count = netdev_uc_count(netdev);
  	u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
  	unsigned int i, j;
  
  	if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) {
  		netdev_warn(netdev, "Registering only %d out of %d "
  			"unicast addresses\n",
  			ENIC_UNICAST_PERFECT_FILTERS, uc_count);
  		uc_count = ENIC_UNICAST_PERFECT_FILTERS;
  	}
  
  	/* Is there an easier way?  Trying to minimize to
  	 * calls to add/del unicast addrs.  We keep the
  	 * addrs from the last call in enic->uc_addr and
  	 * look for changes to add/del.
  	 */
  
  	i = 0;
  	netdev_for_each_uc_addr(ha, netdev) {
  		if (i == uc_count)
  			break;
  		memcpy(uc_addr[i++], ha->addr, ETH_ALEN);
  	}
  
  	for (i = 0; i < enic->uc_count; i++) {
  		for (j = 0; j < uc_count; j++)
  			if (ether_addr_equal(enic->uc_addr[i], uc_addr[j]))
  				break;
  		if (j == uc_count)
  			enic_dev_del_addr(enic, enic->uc_addr[i]);
  	}
  
  	for (i = 0; i < uc_count; i++) {
  		for (j = 0; j < enic->uc_count; j++)
  			if (ether_addr_equal(uc_addr[i], enic->uc_addr[j]))
  				break;
  		if (j == enic->uc_count)
  			enic_dev_add_addr(enic, uc_addr[i]);
  	}
  
  	/* Save the list to compare against next time
  	 */
  
  	for (i = 0; i < uc_count; i++)
  		memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN);
  
  	enic->uc_count = uc_count;
  }
  
  /* netif_tx_lock held, BHs disabled */
  static void enic_set_rx_mode(struct net_device *netdev)
  {
  	struct enic *enic = netdev_priv(netdev);
  	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) ||
  		netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
  	int allmulti = (netdev->flags & IFF_ALLMULTI) ||
  		netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
  	unsigned int flags = netdev->flags |
  		(allmulti ? IFF_ALLMULTI : 0) |
  		(promisc ? IFF_PROMISC : 0);
  
  	if (enic->flags != flags) {
  		enic->flags = flags;
  		enic_dev_packet_filter(enic, directed,
  			multicast, broadcast, promisc, allmulti);
  	}
  
  	if (!promisc) {
  		enic_update_unicast_addr_list(enic);
  		if (!allmulti)
  			enic_update_multicast_addr_list(enic);
  	}
  }
  
  /* 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);
  }
  
  static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
  {
  	struct enic *enic = netdev_priv(netdev);
  	struct enic_port_profile *pp;
  	int err;
  
  	ENIC_PP_BY_INDEX(enic, vf, pp, &err);
  	if (err)
  		return err;
  
  	if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) {
  		if (vf == PORT_SELF_VF) {
  			memcpy(pp->vf_mac, mac, ETH_ALEN);
  			return 0;
  		} else {
  			/*
  			 * For sriov vf's set the mac in hw
  			 */
  			ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
  				vnic_dev_set_mac_addr, mac);
  			return enic_dev_status_to_errno(err);
  		}
  	} else
  		return -EINVAL;
  }
  
  static int enic_set_vf_port(struct net_device *netdev, int vf,
  	struct nlattr *port[])
  {
  	struct enic *enic = netdev_priv(netdev);
  	struct enic_port_profile prev_pp;
  	struct enic_port_profile *pp;
  	int err = 0, restore_pp = 1;
  
  	ENIC_PP_BY_INDEX(enic, vf, pp, &err);
  	if (err)
  		return err;
  
  	if (!port[IFLA_PORT_REQUEST])
  		return -EOPNOTSUPP;
  
  	memcpy(&prev_pp, pp, sizeof(*enic->pp));
  	memset(pp, 0, sizeof(*enic->pp));
  
  	pp->set |= ENIC_SET_REQUEST;
  	pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]);
  
  	if (port[IFLA_PORT_PROFILE]) {
  		pp->set |= ENIC_SET_NAME;
  		memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]),
  			PORT_PROFILE_MAX);
  	}
  
  	if (port[IFLA_PORT_INSTANCE_UUID]) {
  		pp->set |= ENIC_SET_INSTANCE;
  		memcpy(pp->instance_uuid,
  			nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
  	}
  
  	if (port[IFLA_PORT_HOST_UUID]) {
  		pp->set |= ENIC_SET_HOST;
  		memcpy(pp->host_uuid,
  			nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
  	}
  
  	if (vf == PORT_SELF_VF) {
  		/* Special case handling: mac came from IFLA_VF_MAC */
  		if (!is_zero_ether_addr(prev_pp.vf_mac))
  			memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);
  
  		if (is_zero_ether_addr(netdev->dev_addr))
  			eth_hw_addr_random(netdev);
  	} else {
  		/* SR-IOV VF: get mac from adapter */
  		ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
  			vnic_dev_get_mac_addr, pp->mac_addr);
  		if (err) {
  			netdev_err(netdev, "Error getting mac for vf %d\n", vf);
  			memcpy(pp, &prev_pp, sizeof(*pp));
  			return enic_dev_status_to_errno(err);
  		}
  	}
  
  	err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
  	if (err) {
  		if (restore_pp) {
  			/* Things are still the way they were: Implicit
  			 * DISASSOCIATE failed
  			 */
  			memcpy(pp, &prev_pp, sizeof(*pp));
  		} else {
  			memset(pp, 0, sizeof(*pp));
  			if (vf == PORT_SELF_VF)
  				memset(netdev->dev_addr, 0, ETH_ALEN);
  		}
  	} else {
  		/* Set flag to indicate that the port assoc/disassoc
  		 * request has been sent out to fw
  		 */
  		pp->set |= ENIC_PORT_REQUEST_APPLIED;
  
  		/* If DISASSOCIATE, clean up all assigned/saved macaddresses */
  		if (pp->request == PORT_REQUEST_DISASSOCIATE) {
  			memset(pp->mac_addr, 0, ETH_ALEN);
  			if (vf == PORT_SELF_VF)
  				memset(netdev->dev_addr, 0, ETH_ALEN);
  		}
  	}
  
  	if (vf == PORT_SELF_VF)
  		memset(pp->vf_mac, 0, ETH_ALEN);
  
  	return err;
  }
  
  static int enic_get_vf_port(struct net_device *netdev, int vf,
  	struct sk_buff *skb)
  {
  	struct enic *enic = netdev_priv(netdev);
  	u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
  	struct enic_port_profile *pp;
  	int err;
  
  	ENIC_PP_BY_INDEX(enic, vf, pp, &err);
  	if (err)
  		return err;
  
  	if (!(pp->set & ENIC_PORT_REQUEST_APPLIED))
  		return -ENODATA;
  
  	err = enic_process_get_pp_request(enic, vf, pp->request, &response);
  	if (err)
  		return err;
  
  	if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) ||
  	    nla_put_u16(skb, IFLA_PORT_RESPONSE, response) ||
  	    ((pp->set & ENIC_SET_NAME) &&
  	     nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) ||
  	    ((pp->set & ENIC_SET_INSTANCE) &&
  	     nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
  		     pp->instance_uuid)) ||
  	    ((pp->set & ENIC_SET_HOST) &&
  	     nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid)))
  		goto nla_put_failure;
  	return 0;
  
  nla_put_failure:
  	return -EMSGSIZE;
  }
  
  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);
  	struct net_device *netdev = enic->netdev;
  	struct sk_buff *skb;
  	unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
  	unsigned int os_buf_index = 0;
  	dma_addr_t dma_addr;
  
  	skb = netdev_alloc_skb_ip_align(netdev, len);
  	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;
  }
  
  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);
  	struct net_device *netdev = enic->netdev;
  	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;
  	u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
  	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,
  		&packet_error, &vlan_stripped, &vlan_tci, &checksum,
  		&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) {
  
  		if (!fcs_ok) {
  			if (bytes_written > 0)
  				enic->rq_bad_fcs++;
  			else if (bytes_written == 0)
  				enic->rq_truncated_pkts++;
  		}
  
  		dev_kfree_skb_any(skb);
  
  		return;
  	}
  
  	if (eop && bytes_written > 0) {
  
  		/* Good receive
  		 */
  
  		skb_put(skb, bytes_written);
  		skb->protocol = eth_type_trans(skb, netdev);
  		skb_record_rx_queue(skb, q_number);
  		if (netdev->features & NETIF_F_RXHASH) {
  			skb_set_hash(skb, rss_hash,
  				     (rss_type &
  				      (NIC_CFG_RSS_HASH_TYPE_TCP_IPV6_EX |
  				       NIC_CFG_RSS_HASH_TYPE_TCP_IPV6 |
  				       NIC_CFG_RSS_HASH_TYPE_TCP_IPV4)) ?
  				     PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
  		}
  
  		if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc) {
  			skb->csum = htons(checksum);
  			skb->ip_summed = CHECKSUM_COMPLETE;
  		}
  
  		if (vlan_stripped)
  			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci);
  
  		if (netdev->features & NETIF_F_GRO)
  			napi_gro_receive(&enic->napi[q_number], skb);
  		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 net_device *netdev = napi->dev;
  	struct enic *enic = netdev_priv(netdev);
  	unsigned int cq_rq = enic_cq_rq(enic, 0);
  	unsigned int cq_wq = enic_cq_wq(enic, 0);
  	unsigned int intr = enic_legacy_io_intr();
  	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;
  	int err;
  
  	/* Service RQ (first) and WQ
  	 */
  
  	rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
  		rq_work_to_do, enic_rq_service, NULL);
  
  	wq_work_done = vnic_cq_service(&enic->cq[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[intr],
  			work_done,
  			0 /* don't unmask intr */,
  			0 /* don't reset intr timer */);
  
  	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)
  		rq_work_done = rq_work_to_do;
  
  	if (rq_work_done < rq_work_to_do) {
  
  		/* Some work done, but not enough to stay in polling,
  		 * exit polling
  		 */
  
  		napi_complete(napi);
  		vnic_intr_unmask(&enic->intr[intr]);
  	}
  
  	return rq_work_done;
  }
  
  static int enic_poll_msix(struct napi_struct *napi, int budget)
  {
  	struct net_device *netdev = napi->dev;
  	struct enic *enic = netdev_priv(netdev);
  	unsigned int rq = (napi - &enic->napi[0]);
  	unsigned int cq = enic_cq_rq(enic, rq);
  	unsigned int intr = enic_msix_rq_intr(enic, rq);
  	unsigned int work_to_do = budget;
  	unsigned int work_done;
  	int err;
  
  	/* Service RQ
  	 */
  
  	work_done = vnic_cq_service(&enic->cq[cq],
  		work_to_do, enic_rq_service, NULL);
  
  	/* Return intr event credits for this polling
  	 * cycle.  An intr event is the completion of a
  	 * RQ packet.
  	 */
  
  	if (work_done > 0)
  		vnic_intr_return_credits(&enic->intr[intr],
  			work_done,
  			0 /* don't unmask intr */,
  			0 /* don't reset intr timer */);
  
  	err = vnic_rq_fill(&enic->rq[rq], 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,
  		 * exit polling
  		 */
  
  		napi_complete(napi);
  		vnic_intr_unmask(&enic->intr[intr]);
  	}
  
  	return work_done;
  }
  
  static void enic_notify_timer(unsigned long data)
  {
  	struct enic *enic = (struct enic *)data;
  
  	enic_notify_check(enic);
  
  	mod_timer(&enic->notify_timer,
  		round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
  }
  
  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;
  	case VNIC_DEV_INTR_MODE_MSI:
  		free_irq(enic->pdev->irq, enic);
  		break;
  	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, intr;
  	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:
  
  		for (i = 0; i < enic->rq_count; i++) {
  			intr = enic_msix_rq_intr(enic, i);
  			snprintf(enic->msix[intr].devname,
  				sizeof(enic->msix[intr].devname),
  				"%.11s-rx-%d", netdev->name, i);
  			enic->msix[intr].isr = enic_isr_msix_rq;
  			enic->msix[intr].devid = &enic->napi[i];
  		}
  
  		for (i = 0; i < enic->wq_count; i++) {
  			intr = enic_msix_wq_intr(enic, i);
  			snprintf(enic->msix[intr].devname,
  				sizeof(enic->msix[intr].devname),
  				"%.11s-tx-%d", netdev->name, i);
  			enic->msix[intr].isr = enic_isr_msix_wq;
  			enic->msix[intr].devid = enic;
  		}
  
  		intr = enic_msix_err_intr(enic);
  		snprintf(enic->msix[intr].devname,
  			sizeof(enic->msix[intr].devname),
  			"%.11s-err", netdev->name);
  		enic->msix[intr].isr = enic_isr_msix_err;
  		enic->msix[intr].devid = enic;
  
  		intr = enic_msix_notify_intr(enic);
  		snprintf(enic->msix[intr].devname,
  			sizeof(enic->msix[intr].devname),
  			"%.11s-notify", netdev->name);
  		enic->msix[intr].isr = enic_isr_msix_notify;
  		enic->msix[intr].devid = enic;
  
  		for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
  			enic->msix[i].requested = 0;
  
  		for (i = 0; i < enic->intr_count; 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;
  }
  
  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;
  	}
  }
  
  static int enic_dev_notify_set(struct enic *enic)
  {
  	int err;
  
  	spin_lock(&enic->devcmd_lock);
  	switch (vnic_dev_get_intr_mode(enic->vdev)) {
  	case VNIC_DEV_INTR_MODE_INTX:
  		err = vnic_dev_notify_set(enic->vdev,
  			enic_legacy_notify_intr());
  		break;
  	case VNIC_DEV_INTR_MODE_MSIX:
  		err = vnic_dev_notify_set(enic->vdev,
  			enic_msix_notify_intr(enic));
  		break;
  	default:
  		err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
  		break;
  	}
  	spin_unlock(&enic->devcmd_lock);
  
  	return err;
  }
  
  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;
  
  	err = enic_request_intr(enic);
  	if (err) {
  		netdev_err(netdev, "Unable to request irq.\n");
  		return err;
  	}
  
  	err = enic_dev_notify_set(enic);
  	if (err) {
  		netdev_err(netdev,
  			"Failed to alloc notify buffer, aborting.\n");
  		goto err_out_free_intr;
  	}
  
  	for (i = 0; i < enic->rq_count; i++) {
  		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) {
  			netdev_err(netdev, "Unable to alloc receive buffers\n");
  			err = -ENOMEM;
  			goto err_out_notify_unset;
  		}
  	}
  
  	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]);
  
  	if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
  		enic_dev_add_station_addr(enic);
  
  	enic_set_rx_mode(netdev);
  
  	netif_tx_wake_all_queues(netdev);
  
  	for (i = 0; i < enic->rq_count; i++)
  		napi_enable(&enic->napi[i]);
  
  	enic_dev_enable(enic);
  
  	for (i = 0; i < enic->intr_count; i++)
  		vnic_intr_unmask(&enic->intr[i]);
  
  	enic_notify_timer_start(enic);
  
  	return 0;
  
  err_out_notify_unset:
  	enic_dev_notify_unset(enic);
  err_out_free_intr:
  	enic_free_intr(enic);
  
  	return err;
  }
  
  /* 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;
  
  	for (i = 0; i < enic->intr_count; i++) {
  		vnic_intr_mask(&enic->intr[i]);
  		(void)vnic_intr_masked(&enic->intr[i]); /* flush write */
  	}
  
  	enic_synchronize_irqs(enic);
  
  	del_timer_sync(&enic->notify_timer);
  
  	enic_dev_disable(enic);
  
  	for (i = 0; i < enic->rq_count; i++)
  		napi_disable(&enic->napi[i]);
  
  	netif_carrier_off(netdev);
  	netif_tx_disable(netdev);
  
  	if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
  		enic_dev_del_station_addr(enic);
  
  	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;
  	}
  
  	enic_dev_notify_unset(enic);
  	enic_free_intr(enic);
  
  	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);
  
  	if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
  		return -EINVAL;
  
  	if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
  		return -EOPNOTSUPP;
  
  	if (running)
  		enic_stop(netdev);
  
  	netdev->mtu = new_mtu;
  
  	if (netdev->mtu > enic->port_mtu)
  		netdev_warn(netdev,
  			"interface MTU (%d) set higher than port MTU (%d)\n",
  			netdev->mtu, enic->port_mtu);
  
  	if (running)
  		enic_open(netdev);
  
  	return 0;
  }
  
  static void enic_change_mtu_work(struct work_struct *work)
  {
  	struct enic *enic = container_of(work, struct enic, change_mtu_work);
  	struct net_device *netdev = enic->netdev;
  	int new_mtu = vnic_dev_mtu(enic->vdev);
  	int err;
  	unsigned int i;
  
  	new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));
  
  	rtnl_lock();
  
  	/* Stop RQ */
  	del_timer_sync(&enic->notify_timer);
  
  	for (i = 0; i < enic->rq_count; i++)
  		napi_disable(&enic->napi[i]);
  
  	vnic_intr_mask(&enic->intr[0]);
  	enic_synchronize_irqs(enic);
  	err = vnic_rq_disable(&enic->rq[0]);
  	if (err) {
  		rtnl_unlock();
  		netdev_err(netdev, "Unable to disable RQ.\n");
  		return;
  	}
  	vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
  	vnic_cq_clean(&enic->cq[0]);
  	vnic_intr_clean(&enic->intr[0]);
  
  	/* Fill RQ with new_mtu-sized buffers */
  	netdev->mtu = new_mtu;
  	vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
  	/* Need at least one buffer on ring to get going */
  	if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
  		rtnl_unlock();
  		netdev_err(netdev, "Unable to alloc receive buffers.\n");
  		return;
  	}
  
  	/* Start RQ */
  	vnic_rq_enable(&enic->rq[0]);
  	napi_enable(&enic->napi[0]);
  	vnic_intr_unmask(&enic->intr[0]);
  	enic_notify_timer_start(enic);
  
  	rtnl_unlock();
  
  	netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
  }
  
  #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;
  	unsigned int i, intr;
  
  	switch (vnic_dev_get_intr_mode(vdev)) {
  	case VNIC_DEV_INTR_MODE_MSIX:
  		for (i = 0; i < enic->rq_count; i++) {
  			intr = enic_msix_rq_intr(enic, i);
  			enic_isr_msix_rq(enic->msix_entry[intr].vector,
  				&enic->napi[i]);
  		}
  
  		for (i = 0; i < enic->wq_count; i++) {
  			intr = enic_msix_wq_intr(enic, i);
  			enic_isr_msix_wq(enic->msix_entry[intr].vector, 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)
  		dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
  			err);
  
  	return err;
  }
  
  static int enic_dev_hang_reset(struct enic *enic)
  {
  	int err;
  
  	err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
  		vnic_dev_hang_reset_done, 0);
  	if (err)
  		netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
  			err);
  
  	return err;
  }
  
  static int enic_set_rsskey(struct enic *enic)
  {
  	dma_addr_t rss_key_buf_pa;
  	union vnic_rss_key *rss_key_buf_va = NULL;
  	union vnic_rss_key rss_key = {
  		.key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
  		.key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
  		.key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
  		.key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
  	};
  	int err;
  
  	rss_key_buf_va = pci_alloc_consistent(enic->pdev,
  		sizeof(union vnic_rss_key), &rss_key_buf_pa);
  	if (!rss_key_buf_va)
  		return -ENOMEM;
  
  	memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
  
  	spin_lock(&enic->devcmd_lock);
  	err = enic_set_rss_key(enic,
  		rss_key_buf_pa,
  		sizeof(union vnic_rss_key));
  	spin_unlock(&enic->devcmd_lock);
  
  	pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
  		rss_key_buf_va, rss_key_buf_pa);
  
  	return err;
  }
  
  static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
  {
  	dma_addr_t rss_cpu_buf_pa;
  	union vnic_rss_cpu *rss_cpu_buf_va = NULL;
  	unsigned int i;
  	int err;
  
  	rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
  		sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
  	if (!rss_cpu_buf_va)
  		return -ENOMEM;
  
  	for (i = 0; i < (1 << rss_hash_bits); i++)
  		(*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
  
  	spin_lock(&enic->devcmd_lock);
  	err = enic_set_rss_cpu(enic,
  		rss_cpu_buf_pa,
  		sizeof(union vnic_rss_cpu));
  	spin_unlock(&enic->devcmd_lock);
  
  	pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
  		rss_cpu_buf_va, rss_cpu_buf_pa);
  
  	return err;
  }
  
  static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
  	u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
  {
  	const u8 tso_ipid_split_en = 0;
  	const u8 ig_vlan_strip_en = 1;
  	int err;
  
  	/* Enable VLAN tag stripping.
  	*/
  
  	spin_lock(&enic->devcmd_lock);
  	err = enic_set_nic_cfg(enic,
  		rss_default_cpu, rss_hash_type,
  		rss_hash_bits, rss_base_cpu,
  		rss_enable, tso_ipid_split_en,
  		ig_vlan_strip_en);
  	spin_unlock(&enic->devcmd_lock);
  
  	return err;
  }
  
  static int enic_set_rss_nic_cfg(struct enic *enic)
  {
  	struct device *dev = enic_get_dev(enic);
  	const u8 rss_default_cpu = 0;
  	const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
  		NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
  		NIC_CFG_RSS_HASH_TYPE_IPV6 |
  		NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
  	const u8 rss_hash_bits = 7;
  	const u8 rss_base_cpu = 0;
  	u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
  
  	if (rss_enable) {
  		if (!enic_set_rsskey(enic)) {
  			if (enic_set_rsscpu(enic, rss_hash_bits)) {
  				rss_enable = 0;
  				dev_warn(dev, "RSS disabled, "
  					"Failed to set RSS cpu indirection table.");
  			}
  		} else {
  			rss_enable = 0;
  			dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
  		}
  	}
  
  	return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
  		rss_hash_bits, rss_base_cpu, rss_enable);
  }
  
  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();
  
  	spin_lock(&enic->enic_api_lock);
  	enic_dev_hang_notify(enic);
  	enic_stop(enic->netdev);
  	enic_dev_hang_reset(enic);
  	enic_reset_addr_lists(enic);
  	enic_init_vnic_resources(enic);
  	enic_set_rss_nic_cfg(enic);
  	enic_dev_set_ig_vlan_rewrite_mode(enic);
  	enic_open(enic->netdev);
  	spin_unlock(&enic->enic_api_lock);
  	call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev);
  
  	rtnl_unlock();
  }
  
  static int enic_set_intr_mode(struct enic *enic)
  {
  	unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
  	unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
  	unsigned int i;
  
  	/* Set interrupt mode (INTx, MSI, MSI-X) depending
  	 * on 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;
  
  	/* Use multiple RQs if RSS is enabled
  	 */
  
  	if (ENIC_SETTING(enic, RSS) &&
  	    enic->config.intr_mode < 1 &&
  	    enic->rq_count >= n &&
  	    enic->wq_count >= m &&
  	    enic->cq_count >= n + m &&
  	    enic->intr_count >= n + m + 2) {
  
  		if (!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;
  		}
  	}
  
  	if (enic->config.intr_mode < 1 &&
  	    enic->rq_count >= 1 &&
  	    enic->wq_count >= m &&
  	    enic->cq_count >= 1 + m &&
  	    enic->intr_count >= 1 + m + 2) {
  		if (!pci_enable_msix(enic->pdev, enic->msix_entry, 1 + m + 2)) {
  
  			enic->rq_count = 1;
  			enic->wq_count = m;
  			enic->cq_count = 1 + m;
  			enic->intr_count = 1 + 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);
  }
  
  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_stats64	= enic_get_stats,
  	.ndo_validate_addr	= eth_validate_addr,
  	.ndo_set_rx_mode	= enic_set_rx_mode,
  	.ndo_set_mac_address	= enic_set_mac_address_dynamic,
  	.ndo_change_mtu		= enic_change_mtu,
  	.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,
  	.ndo_set_vf_mac		= enic_set_vf_mac,
  #ifdef CONFIG_NET_POLL_CONTROLLER
  	.ndo_poll_controller	= enic_poll_controller,
  #endif
  };
  
  static const struct net_device_ops enic_netdev_ops = {
  	.ndo_open		= enic_open,
  	.ndo_stop		= enic_stop,
  	.ndo_start_xmit		= enic_hard_start_xmit,
  	.ndo_get_stats64	= enic_get_stats,
  	.ndo_validate_addr	= eth_validate_addr,
  	.ndo_set_mac_address	= enic_set_mac_address,
  	.ndo_set_rx_mode	= enic_set_rx_mode,
  	.ndo_change_mtu		= enic_change_mtu,
  	.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,
  	.ndo_set_vf_mac		= enic_set_vf_mac,
  #ifdef CONFIG_NET_POLL_CONTROLLER
  	.ndo_poll_controller	= enic_poll_controller,
  #endif
  };
  
  static void enic_dev_deinit(struct enic *enic)
  {
  	unsigned int i;
  
  	for (i = 0; i < enic->rq_count; i++)
  		netif_napi_del(&enic->napi[i]);
  
  	enic_free_vnic_resources(enic);
  	enic_clear_intr_mode(enic);
  }
  
  static int enic_dev_init(struct enic *enic)
  {
  	struct device *dev = enic_get_dev(enic);
  	struct net_device *netdev = enic->netdev;
  	unsigned int i;
  	int err;
  
  	/* Get interrupt coalesce timer info */
  	err = enic_dev_intr_coal_timer_info(enic);
  	if (err) {
  		dev_warn(dev, "Using default conversion factor for "
  			"interrupt coalesce timer\n");
  		vnic_dev_intr_coal_timer_info_default(enic->vdev);
  	}
  
  	/* Get vNIC configuration
  	 */
  
  	err = enic_get_vnic_config(enic);
  	if (err) {
  		dev_err(dev, "Get vNIC configuration failed, aborting\n");
  		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) {
  		dev_err(dev, "Failed to set intr mode based on resource "
  			"counts and system capabilities, aborting\n");
  		return err;
  	}
  
  	/* Allocate and configure vNIC resources
  	 */
  
  	err = enic_alloc_vnic_resources(enic);
  	if (err) {
  		dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
  		goto err_out_free_vnic_resources;
  	}
  
  	enic_init_vnic_resources(enic);
  
  	err = enic_set_rss_nic_cfg(enic);
  	if (err) {
  		dev_err(dev, "Failed to config nic, aborting\n");
  		goto err_out_free_vnic_resources;
  	}
  
  	switch (vnic_dev_get_intr_mode(enic->vdev)) {
  	default:
  		netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
  		break;
  	case VNIC_DEV_INTR_MODE_MSIX:
  		for (i = 0; i < enic->rq_count; i++)
  			netif_napi_add(netdev, &enic->napi[i],
  				enic_poll_msix, 64);
  		break;
  	}
  
  	return 0;
  
  err_out_free_vnic_resources:
  	enic_clear_intr_mode(enic);
  	enic_free_vnic_resources(enic);
  
  	return err;
  }
  
  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);
  }
  
  static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
  {
  	struct device *dev = &pdev->dev;
  	struct net_device *netdev;
  	struct enic *enic;
  	int using_dac = 0;
  	unsigned int i;
  	int err;
  #ifdef CONFIG_PCI_IOV
  	int pos = 0;
  #endif
  	int num_pps = 1;
  
  	/* Allocate net device structure and initialize.  Private
  	 * instance data is initialized to zero.
  	 */
  
  	netdev = alloc_etherdev_mqs(sizeof(struct enic),
  				    ENIC_RQ_MAX, ENIC_WQ_MAX);
  	if (!netdev)
  		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_mem(pdev);
  	if (err) {
  		dev_err(dev, "Cannot enable PCI device, aborting\n");
  		goto err_out_free_netdev;
  	}
  
  	err = pci_request_regions(pdev, DRV_NAME);
  	if (err) {
  		dev_err(dev, "Cannot request PCI regions, aborting\n");
  		goto err_out_disable_device;
  	}
  
  	pci_set_master(pdev);
  
  	/* Query PCI controller on system for DMA addressing
  	 * limitation for the device.  Try 64-bit first, and
  	 * fail to 32-bit.
  	 */
  
  	err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
  	if (err) {
  		err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
  		if (err) {
  			dev_err(dev, "No usable DMA configuration, aborting\n");
  			goto err_out_release_regions;
  		}
  		err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
  		if (err) {
  			dev_err(dev, "Unable to obtain %u-bit DMA "
  				"for consistent allocations, aborting\n", 32);
  			goto err_out_release_regions;
  		}
  	} else {
  		err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
  		if (err) {
  			dev_err(dev, "Unable to obtain %u-bit DMA "
  				"for consistent allocations, aborting\n", 64);
  			goto err_out_release_regions;
  		}
  		using_dac = 1;
  	}
  
  	/* Map vNIC resources from BAR0-5
  	 */
  
  	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) {
  			dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
  			err = -ENODEV;
  			goto err_out_iounmap;
  		}
  		enic->bar[i].bus_addr = pci_resource_start(pdev, i);
  	}
  
  	/* Register vNIC device
  	 */
  
  	enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
  		ARRAY_SIZE(enic->bar));
  	if (!enic->vdev) {
  		dev_err(dev, "vNIC registration failed, aborting\n");
  		err = -ENODEV;
  		goto err_out_iounmap;
  	}
  
  #ifdef CONFIG_PCI_IOV
  	/* Get number of subvnics */
  	pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
  	if (pos) {
  		pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
  			&enic->num_vfs);
  		if (enic->num_vfs) {
  			err = pci_enable_sriov(pdev, enic->num_vfs);
  			if (err) {
  				dev_err(dev, "SRIOV enable failed, aborting."
  					" pci_enable_sriov() returned %d\n",
  					err);
  				goto err_out_vnic_unregister;
  			}
  			enic->priv_flags |= ENIC_SRIOV_ENABLED;
  			num_pps = enic->num_vfs;
  		}
  	}
  #endif
  
  	/* Allocate structure for port profiles */
  	enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL);
  	if (!enic->pp) {
  		err = -ENOMEM;
  		goto err_out_disable_sriov_pp;
  	}
  
  	/* Issue device open to get device in known state
  	 */
  
  	err = enic_dev_open(enic);
  	if (err) {
  		dev_err(dev, "vNIC dev open failed, aborting\n");
  		goto err_out_disable_sriov;
  	}
  
  	/* Setup devcmd lock
  	 */
  
  	spin_lock_init(&enic->devcmd_lock);
  	spin_lock_init(&enic->enic_api_lock);
  
  	/*
  	 * Set ingress vlan rewrite mode before vnic initialization
  	 */
  
  	err = enic_dev_set_ig_vlan_rewrite_mode(enic);
  	if (err) {
  		dev_err(dev,
  			"Failed to set ingress vlan rewrite mode, aborting.\n");
  		goto err_out_dev_close;
  	}
  
  	/* 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);
  
  	/* Do not call dev_init for a dynamic vnic.
  	 * For a dynamic vnic, init_prov_info will be
  	 * called later by an upper layer.
  	 */
  
  	if (!enic_is_dynamic(enic)) {
  		err = vnic_dev_init(enic->vdev, 0);
  		if (err) {
  			dev_err(dev, "vNIC dev init failed, aborting\n");
  			goto err_out_dev_close;
  		}
  	}
  
  	err = enic_dev_init(enic);
  	if (err) {
  		dev_err(dev, "Device initialization failed, aborting\n");
  		goto err_out_dev_close;
  	}
  
  	netif_set_real_num_tx_queues(netdev, enic->wq_count);
  	netif_set_real_num_rx_queues(netdev, enic->rq_count);
  
  	/* Setup notification timer, HW reset task, and wq locks
  	 */
  
  	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);
  	INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
  
  	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) {
  		dev_err(dev, "Invalid MAC address, aborting\n");
  		goto err_out_dev_deinit;
  	}
  
  	enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
  	enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
  
  	if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
  		netdev->netdev_ops = &enic_netdev_dynamic_ops;
  	else
  		netdev->netdev_ops = &enic_netdev_ops;
  
  	netdev->watchdog_timeo = 2 * HZ;
  	enic_set_ethtool_ops(netdev);
  
  	netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
  	if (ENIC_SETTING(enic, LOOP)) {
  		netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX;
  		enic->loop_enable = 1;
  		enic->loop_tag = enic->config.loop_tag;
  		dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
  	}
  	if (ENIC_SETTING(enic, TXCSUM))
  		netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
  	if (ENIC_SETTING(enic, TSO))
  		netdev->hw_features |= NETIF_F_TSO |
  			NETIF_F_TSO6 | NETIF_F_TSO_ECN;
  	if (ENIC_SETTING(enic, RSS))
  		netdev->hw_features |= NETIF_F_RXHASH;
  	if (ENIC_SETTING(enic, RXCSUM))
  		netdev->hw_features |= NETIF_F_RXCSUM;
  
  	netdev->features |= netdev->hw_features;
  
  	if (using_dac)
  		netdev->features |= NETIF_F_HIGHDMA;
  
  	netdev->priv_flags |= IFF_UNICAST_FLT;
  
  	err = register_netdev(netdev);
  	if (err) {
  		dev_err(dev, "Cannot register net device, aborting\n");
  		goto err_out_dev_deinit;
  	}
  
  	return 0;
  
  err_out_dev_deinit:
  	enic_dev_deinit(enic);
  err_out_dev_close:
  	vnic_dev_close(enic->vdev);
  err_out_disable_sriov:
  	kfree(enic->pp);
  err_out_disable_sriov_pp:
  #ifdef CONFIG_PCI_IOV
  	if (enic_sriov_enabled(enic)) {
  		pci_disable_sriov(pdev);
  		enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
  	}
  err_out_vnic_unregister:
  #endif
  	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:
  	free_netdev(netdev);
  
  	return err;
  }
  
  static void enic_remove(struct pci_dev *pdev)
  {
  	struct net_device *netdev = pci_get_drvdata(pdev);
  
  	if (netdev) {
  		struct enic *enic = netdev_priv(netdev);
  
  		cancel_work_sync(&enic->reset);
  		cancel_work_sync(&enic->change_mtu_work);
  		unregister_netdev(netdev);
  		enic_dev_deinit(enic);
  		vnic_dev_close(enic->vdev);
  #ifdef CONFIG_PCI_IOV
  		if (enic_sriov_enabled(enic)) {
  			pci_disable_sriov(pdev);
  			enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
  		}
  #endif
  		kfree(enic->pp);
  		vnic_dev_unregister(enic->vdev);
  		enic_iounmap(enic);
  		pci_release_regions(pdev);
  		pci_disable_device(pdev);
  		free_netdev(netdev);
  	}
  }
  
  static struct pci_driver enic_driver = {
  	.name = DRV_NAME,
  	.id_table = enic_id_table,
  	.probe = enic_probe,
  	.remove = enic_remove,
  };
  
  static int __init enic_init_module(void)
  {
  	pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
  
  	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);
  