Merge branch 'linus' into x86/urgent

Merge reason: We need the x86/uv updates from upstream, to queue up
              dependent fix.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2922 insertions, 0 deletions

diff --git a/drivers/net/igbvf/netdev.c b/drivers/net/igbvf/netdev.c
new file mode 100644
index 000000000000..b774666ad3cf
--- /dev/null
+++ b/drivers/net/igbvf/netdev.c
@@ -0,0 +1,2922 @@
+/*******************************************************************************
+
+  Intel(R) 82576 Virtual Function Linux driver
+  Copyright(c) 2009 Intel Corporation.
+
+  This program is free software; you can redistribute it and/or modify it
+  under the terms and conditions of the GNU General Public License,
+  version 2, as published by the Free Software Foundation.
+
+  This program is distributed in the hope it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+  more details.
+
+  You should have received a copy of the GNU General Public License along with
+  this program; if not, write to the Free Software Foundation, Inc.,
+  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+
+  The full GNU General Public License is included in this distribution in
+  the file called "COPYING".
+
+  Contact Information:
+  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
+  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+
+*******************************************************************************/
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/vmalloc.h>
+#include <linux/pagemap.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/tcp.h>
+#include <linux/ipv6.h>
+#include <net/checksum.h>
+#include <net/ip6_checksum.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/if_vlan.h>
+#include <linux/pm_qos_params.h>
+
+#include "igbvf.h"
+
+#define DRV_VERSION "1.0.0-k0"
+char igbvf_driver_name[] = "igbvf";
+const char igbvf_driver_version[] = DRV_VERSION;
+static const char igbvf_driver_string[] =
+                                "Intel(R) Virtual Function Network Driver";
+static const char igbvf_copyright[] = "Copyright (c) 2009 Intel Corporation.";
+
+static int igbvf_poll(struct napi_struct *napi, int budget);
+static void igbvf_reset(struct igbvf_adapter *);
+static void igbvf_set_interrupt_capability(struct igbvf_adapter *);
+static void igbvf_reset_interrupt_capability(struct igbvf_adapter *);
+
+static struct igbvf_info igbvf_vf_info = {
+        .mac                    = e1000_vfadapt,
+        .flags                  = FLAG_HAS_JUMBO_FRAMES
+                                  | FLAG_RX_CSUM_ENABLED,
+        .pba                    = 10,
+        .init_ops               = e1000_init_function_pointers_vf,
+};
+
+static const struct igbvf_info *igbvf_info_tbl[] = {
+        [board_vf]              = &igbvf_vf_info,
+};
+
+/**
+ * igbvf_desc_unused - calculate if we have unused descriptors
+ **/
+static int igbvf_desc_unused(struct igbvf_ring *ring)
+{
+        if (ring->next_to_clean > ring->next_to_use)
+                return ring->next_to_clean - ring->next_to_use - 1;
+
+        return ring->count + ring->next_to_clean - ring->next_to_use - 1;
+}
+
+/**
+ * igbvf_receive_skb - helper function to handle Rx indications
+ * @adapter: board private structure
+ * @status: descriptor status field as written by hardware
+ * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
+ * @skb: pointer to sk_buff to be indicated to stack
+ **/
+static void igbvf_receive_skb(struct igbvf_adapter *adapter,
+                              struct net_device *netdev,
+                              struct sk_buff *skb,
+                              u32 status, u16 vlan)
+{
+        if (adapter->vlgrp && (status & E1000_RXD_STAT_VP))
+                vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
+                                         le16_to_cpu(vlan) &
+                                         E1000_RXD_SPC_VLAN_MASK);
+        else
+                netif_receive_skb(skb);
+
+        netdev->last_rx = jiffies;
+}
+
+static inline void igbvf_rx_checksum_adv(struct igbvf_adapter *adapter,
+                                         u32 status_err, struct sk_buff *skb)
+{
+        skb->ip_summed = CHECKSUM_NONE;
+
+        /* Ignore Checksum bit is set or checksum is disabled through ethtool */
+        if ((status_err & E1000_RXD_STAT_IXSM))
+                return;
+        /* TCP/UDP checksum error bit is set */
+        if (status_err &
+            (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) {
+                /* let the stack verify checksum errors */
+                adapter->hw_csum_err++;
+                return;
+        }
+        /* It must be a TCP or UDP packet with a valid checksum */
+        if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))
+                skb->ip_summed = CHECKSUM_UNNECESSARY;
+
+        adapter->hw_csum_good++;
+}
+
+/**
+ * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split
+ * @rx_ring: address of ring structure to repopulate
+ * @cleaned_count: number of buffers to repopulate
+ **/
+static void igbvf_alloc_rx_buffers(struct igbvf_ring *rx_ring,
+                                   int cleaned_count)
+{
+        struct igbvf_adapter *adapter = rx_ring->adapter;
+        struct net_device *netdev = adapter->netdev;
+        struct pci_dev *pdev = adapter->pdev;
+        union e1000_adv_rx_desc *rx_desc;
+        struct igbvf_buffer *buffer_info;
+        struct sk_buff *skb;
+        unsigned int i;
+        int bufsz;
+
+        i = rx_ring->next_to_use;
+        buffer_info = &rx_ring->buffer_info[i];
+
+        if (adapter->rx_ps_hdr_size)
+                bufsz = adapter->rx_ps_hdr_size;
+        else
+                bufsz = adapter->rx_buffer_len;
+        bufsz += NET_IP_ALIGN;
+
+        while (cleaned_count--) {
+                rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
+
+                if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) {
+                        if (!buffer_info->page) {
+                                buffer_info->page = alloc_page(GFP_ATOMIC);
+                                if (!buffer_info->page) {
+                                        adapter->alloc_rx_buff_failed++;
+                                        goto no_buffers;
+                                }
+                                buffer_info->page_offset = 0;
+                        } else {
+                                buffer_info->page_offset ^= PAGE_SIZE / 2;
+                        }
+                        buffer_info->page_dma =
+                                pci_map_page(pdev, buffer_info->page,
+                                             buffer_info->page_offset,
+                                             PAGE_SIZE / 2,
+                                             PCI_DMA_FROMDEVICE);
+                }
+
+                if (!buffer_info->skb) {
+                        skb = netdev_alloc_skb(netdev, bufsz);
+                        if (!skb) {
+                                adapter->alloc_rx_buff_failed++;
+                                goto no_buffers;
+                        }
+
+                        /* Make buffer alignment 2 beyond a 16 byte boundary
+                         * this will result in a 16 byte aligned IP header after
+                         * the 14 byte MAC header is removed
+                         */
+                        skb_reserve(skb, NET_IP_ALIGN);
+
+                        buffer_info->skb = skb;
+                        buffer_info->dma = pci_map_single(pdev, skb->data,
+                                                          bufsz,
+                                                          PCI_DMA_FROMDEVICE);
+                }
+                /* Refresh the desc even if buffer_addrs didn't change because
+                 * each write-back erases this info. */
+                if (adapter->rx_ps_hdr_size) {
+                        rx_desc->read.pkt_addr =
+                             cpu_to_le64(buffer_info->page_dma);
+                        rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma);
+                } else {
+                        rx_desc->read.pkt_addr =
+                             cpu_to_le64(buffer_info->dma);
+                        rx_desc->read.hdr_addr = 0;
+                }
+
+                i++;
+                if (i == rx_ring->count)
+                        i = 0;
+                buffer_info = &rx_ring->buffer_info[i];
+        }
+
+no_buffers:
+        if (rx_ring->next_to_use != i) {
+                rx_ring->next_to_use = i;
+                if (i == 0)
+                        i = (rx_ring->count - 1);
+                else
+                        i--;
+
+                /* Force memory writes to complete before letting h/w
+                 * know there are new descriptors to fetch.  (Only
+                 * applicable for weak-ordered memory model archs,
+                 * such as IA-64). */
+                wmb();
+                writel(i, adapter->hw.hw_addr + rx_ring->tail);
+        }
+}
+
+/**
+ * igbvf_clean_rx_irq - Send received data up the network stack; legacy
+ * @adapter: board private structure
+ *
+ * the return value indicates whether actual cleaning was done, there
+ * is no guarantee that everything was cleaned
+ **/
+static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter,
+                               int *work_done, int work_to_do)
+{
+        struct igbvf_ring *rx_ring = adapter->rx_ring;
+        struct net_device *netdev = adapter->netdev;
+        struct pci_dev *pdev = adapter->pdev;
+        union e1000_adv_rx_desc *rx_desc, *next_rxd;
+        struct igbvf_buffer *buffer_info, *next_buffer;
+        struct sk_buff *skb;
+        bool cleaned = false;
+        int cleaned_count = 0;
+        unsigned int total_bytes = 0, total_packets = 0;
+        unsigned int i;
+        u32 length, hlen, staterr;
+
+        i = rx_ring->next_to_clean;
+        rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
+        staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
+
+        while (staterr & E1000_RXD_STAT_DD) {
+                if (*work_done >= work_to_do)
+                        break;
+                (*work_done)++;
+
+                buffer_info = &rx_ring->buffer_info[i];
+
+                /* HW will not DMA in data larger than the given buffer, even
+                 * if it parses the (NFS, of course) header to be larger.  In
+                 * that case, it fills the header buffer and spills the rest
+                 * into the page.
+                 */
+                hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info) &
+                  E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT;
+                if (hlen > adapter->rx_ps_hdr_size)
+                        hlen = adapter->rx_ps_hdr_size;
+
+                length = le16_to_cpu(rx_desc->wb.upper.length);
+                cleaned = true;
+                cleaned_count++;
+
+                skb = buffer_info->skb;
+                prefetch(skb->data - NET_IP_ALIGN);
+                buffer_info->skb = NULL;
+                if (!adapter->rx_ps_hdr_size) {
+                        pci_unmap_single(pdev, buffer_info->dma,
+                                         adapter->rx_buffer_len,
+                                         PCI_DMA_FROMDEVICE);
+                        buffer_info->dma = 0;
+                        skb_put(skb, length);
+                        goto send_up;
+                }
+
+                if (!skb_shinfo(skb)->nr_frags) {
+                        pci_unmap_single(pdev, buffer_info->dma,
+                                         adapter->rx_ps_hdr_size + NET_IP_ALIGN,
+                                         PCI_DMA_FROMDEVICE);
+                        skb_put(skb, hlen);
+                }
+
+                if (length) {
+                        pci_unmap_page(pdev, buffer_info->page_dma,
+                                       PAGE_SIZE / 2,
+                                       PCI_DMA_FROMDEVICE);
+                        buffer_info->page_dma = 0;
+
+                        skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags++,
+                                           buffer_info->page,
+                                           buffer_info->page_offset,
+                                           length);
+
+                        if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) ||
+                            (page_count(buffer_info->page) != 1))
+                                buffer_info->page = NULL;
+                        else
+                                get_page(buffer_info->page);
+
+                        skb->len += length;
+                        skb->data_len += length;
+                        skb->truesize += length;
+                }
+send_up:
+                i++;
+                if (i == rx_ring->count)
+                        i = 0;
+                next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i);
+                prefetch(next_rxd);
+                next_buffer = &rx_ring->buffer_info[i];
+
+                if (!(staterr & E1000_RXD_STAT_EOP)) {
+                        buffer_info->skb = next_buffer->skb;
+                        buffer_info->dma = next_buffer->dma;
+                        next_buffer->skb = skb;
+                        next_buffer->dma = 0;
+                        goto next_desc;
+                }
+
+                if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
+                        dev_kfree_skb_irq(skb);
+                        goto next_desc;
+                }
+
+                total_bytes += skb->len;
+                total_packets++;
+
+                igbvf_rx_checksum_adv(adapter, staterr, skb);
+
+                skb->protocol = eth_type_trans(skb, netdev);
+
+                igbvf_receive_skb(adapter, netdev, skb, staterr,
+                                  rx_desc->wb.upper.vlan);
+
+                netdev->last_rx = jiffies;
+
+next_desc:
+                rx_desc->wb.upper.status_error = 0;
+
+                /* return some buffers to hardware, one at a time is too slow */
+                if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) {
+                        igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
+                        cleaned_count = 0;
+                }
+
+                /* use prefetched values */
+                rx_desc = next_rxd;
+                buffer_info = next_buffer;
+
+                staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
+        }
+
+        rx_ring->next_to_clean = i;
+        cleaned_count = igbvf_desc_unused(rx_ring);
+
+        if (cleaned_count)
+                igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
+
+        adapter->total_rx_packets += total_packets;
+        adapter->total_rx_bytes += total_bytes;
+        adapter->net_stats.rx_bytes += total_bytes;
+        adapter->net_stats.rx_packets += total_packets;
+        return cleaned;
+}
+
+static void igbvf_put_txbuf(struct igbvf_adapter *adapter,
+                            struct igbvf_buffer *buffer_info)
+{
+        buffer_info->dma = 0;
+        if (buffer_info->skb) {
+                skb_dma_unmap(&adapter->pdev->dev, buffer_info->skb,
+                              DMA_TO_DEVICE);
+                dev_kfree_skb_any(buffer_info->skb);
+                buffer_info->skb = NULL;
+        }
+        buffer_info->time_stamp = 0;
+}
+
+static void igbvf_print_tx_hang(struct igbvf_adapter *adapter)
+{
+        struct igbvf_ring *tx_ring = adapter->tx_ring;
+        unsigned int i = tx_ring->next_to_clean;
+        unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
+        union e1000_adv_tx_desc *eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop);
+
+        /* detected Tx unit hang */
+        dev_err(&adapter->pdev->dev,
+                "Detected Tx Unit Hang:\n"
+                "  TDH                  <%x>\n"
+                "  TDT                  <%x>\n"
+                "  next_to_use          <%x>\n"
+                "  next_to_clean        <%x>\n"
+                "buffer_info[next_to_clean]:\n"
+                "  time_stamp           <%lx>\n"
+                "  next_to_watch        <%x>\n"
+                "  jiffies              <%lx>\n"
+                "  next_to_watch.status <%x>\n",
+                readl(adapter->hw.hw_addr + tx_ring->head),
+                readl(adapter->hw.hw_addr + tx_ring->tail),
+                tx_ring->next_to_use,
+                tx_ring->next_to_clean,
+                tx_ring->buffer_info[eop].time_stamp,
+                eop,
+                jiffies,
+                eop_desc->wb.status);
+}
+
+/**
+ * igbvf_setup_tx_resources - allocate Tx resources (Descriptors)
+ * @adapter: board private structure
+ *
+ * Return 0 on success, negative on failure
+ **/
+int igbvf_setup_tx_resources(struct igbvf_adapter *adapter,
+                             struct igbvf_ring *tx_ring)
+{
+        struct pci_dev *pdev = adapter->pdev;
+        int size;
+
+        size = sizeof(struct igbvf_buffer) * tx_ring->count;
+        tx_ring->buffer_info = vmalloc(size);
+        if (!tx_ring->buffer_info)
+                goto err;
+        memset(tx_ring->buffer_info, 0, size);
+
+        /* round up to nearest 4K */
+        tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
+        tx_ring->size = ALIGN(tx_ring->size, 4096);
+
+        tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
+                                             &tx_ring->dma);
+
+        if (!tx_ring->desc)
+                goto err;
+
+        tx_ring->adapter = adapter;
+        tx_ring->next_to_use = 0;
+        tx_ring->next_to_clean = 0;
+
+        return 0;
+err:
+        vfree(tx_ring->buffer_info);
+        dev_err(&adapter->pdev->dev,
+                "Unable to allocate memory for the transmit descriptor ring\n");
+        return -ENOMEM;
+}
+
+/**
+ * igbvf_setup_rx_resources - allocate Rx resources (Descriptors)
+ * @adapter: board private structure
+ *
+ * Returns 0 on success, negative on failure
+ **/
+int igbvf_setup_rx_resources(struct igbvf_adapter *adapter,
+                             struct igbvf_ring *rx_ring)
+{
+        struct pci_dev *pdev = adapter->pdev;
+        int size, desc_len;
+
+        size = sizeof(struct igbvf_buffer) * rx_ring->count;
+        rx_ring->buffer_info = vmalloc(size);
+        if (!rx_ring->buffer_info)
+                goto err;
+        memset(rx_ring->buffer_info, 0, size);
+
+        desc_len = sizeof(union e1000_adv_rx_desc);
+
+        /* Round up to nearest 4K */
+        rx_ring->size = rx_ring->count * desc_len;
+        rx_ring->size = ALIGN(rx_ring->size, 4096);
+
+        rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size,
+                                             &rx_ring->dma);
+
+        if (!rx_ring->desc)
+                goto err;
+
+        rx_ring->next_to_clean = 0;
+        rx_ring->next_to_use = 0;
+
+        rx_ring->adapter = adapter;
+
+        return 0;
+
+err:
+        vfree(rx_ring->buffer_info);
+        rx_ring->buffer_info = NULL;
+        dev_err(&adapter->pdev->dev,
+                "Unable to allocate memory for the receive descriptor ring\n");
+        return -ENOMEM;
+}
+
+/**
+ * igbvf_clean_tx_ring - Free Tx Buffers
+ * @tx_ring: ring to be cleaned
+ **/
+static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring)
+{
+        struct igbvf_adapter *adapter = tx_ring->adapter;
+        struct igbvf_buffer *buffer_info;
+        unsigned long size;
+        unsigned int i;
+
+        if (!tx_ring->buffer_info)
+                return;
+
+        /* Free all the Tx ring sk_buffs */
+        for (i = 0; i < tx_ring->count; i++) {
+                buffer_info = &tx_ring->buffer_info[i];
+                igbvf_put_txbuf(adapter, buffer_info);
+        }
+
+        size = sizeof(struct igbvf_buffer) * tx_ring->count;
+        memset(tx_ring->buffer_info, 0, size);
+
+        /* Zero out the descriptor ring */
+        memset(tx_ring->desc, 0, tx_ring->size);
+
+        tx_ring->next_to_use = 0;
+        tx_ring->next_to_clean = 0;
+
+        writel(0, adapter->hw.hw_addr + tx_ring->head);
+        writel(0, adapter->hw.hw_addr + tx_ring->tail);
+}
+
+/**
+ * igbvf_free_tx_resources - Free Tx Resources per Queue
+ * @tx_ring: ring to free resources from
+ *
+ * Free all transmit software resources
+ **/
+void igbvf_free_tx_resources(struct igbvf_ring *tx_ring)
+{
+        struct pci_dev *pdev = tx_ring->adapter->pdev;
+
+        igbvf_clean_tx_ring(tx_ring);
+
+        vfree(tx_ring->buffer_info);
+        tx_ring->buffer_info = NULL;
+
+        pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
+
+        tx_ring->desc = NULL;
+}
+
+/**
+ * igbvf_clean_rx_ring - Free Rx Buffers per Queue
+ * @adapter: board private structure
+ **/
+static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring)
+{
+        struct igbvf_adapter *adapter = rx_ring->adapter;
+        struct igbvf_buffer *buffer_info;
+        struct pci_dev *pdev = adapter->pdev;
+        unsigned long size;
+        unsigned int i;
+
+        if (!rx_ring->buffer_info)
+                return;
+
+        /* Free all the Rx ring sk_buffs */
+        for (i = 0; i < rx_ring->count; i++) {
+                buffer_info = &rx_ring->buffer_info[i];
+                if (buffer_info->dma) {
+                        if (adapter->rx_ps_hdr_size){
+                                pci_unmap_single(pdev, buffer_info->dma,
+                                                 adapter->rx_ps_hdr_size,
+                                                 PCI_DMA_FROMDEVICE);
+                        } else {
+                                pci_unmap_single(pdev, buffer_info->dma,
+                                                 adapter->rx_buffer_len,
+                                                 PCI_DMA_FROMDEVICE);
+                        }
+                        buffer_info->dma = 0;
+                }
+
+                if (buffer_info->skb) {
+                        dev_kfree_skb(buffer_info->skb);
+                        buffer_info->skb = NULL;
+                }
+
+                if (buffer_info->page) {
+                        if (buffer_info->page_dma)
+                                pci_unmap_page(pdev, buffer_info->page_dma,
+                                               PAGE_SIZE / 2,
+                                               PCI_DMA_FROMDEVICE);
+                        put_page(buffer_info->page);
+                        buffer_info->page = NULL;
+                        buffer_info->page_dma = 0;
+                        buffer_info->page_offset = 0;
+                }
+        }
+
+        size = sizeof(struct igbvf_buffer) * rx_ring->count;
+        memset(rx_ring->buffer_info, 0, size);
+
+        /* Zero out the descriptor ring */
+        memset(rx_ring->desc, 0, rx_ring->size);
+
+        rx_ring->next_to_clean = 0;
+        rx_ring->next_to_use = 0;
+
+        writel(0, adapter->hw.hw_addr + rx_ring->head);
+        writel(0, adapter->hw.hw_addr + rx_ring->tail);
+}
+
+/**
+ * igbvf_free_rx_resources - Free Rx Resources
+ * @rx_ring: ring to clean the resources from
+ *
+ * Free all receive software resources
+ **/
+
+void igbvf_free_rx_resources(struct igbvf_ring *rx_ring)
+{
+        struct pci_dev *pdev = rx_ring->adapter->pdev;
+
+        igbvf_clean_rx_ring(rx_ring);
+
+        vfree(rx_ring->buffer_info);
+        rx_ring->buffer_info = NULL;
+
+        dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
+                          rx_ring->dma);
+        rx_ring->desc = NULL;
+}
+
+/**
+ * igbvf_update_itr - update the dynamic ITR value based on statistics
+ * @adapter: pointer to adapter
+ * @itr_setting: current adapter->itr
+ * @packets: the number of packets during this measurement interval
+ * @bytes: the number of bytes during this measurement interval
+ *
+ *      Stores a new ITR value based on packets and byte
+ *      counts during the last interrupt.  The advantage of per interrupt
+ *      computation is faster updates and more accurate ITR for the current
+ *      traffic pattern.  Constants in this function were computed
+ *      based on theoretical maximum wire speed and thresholds were set based
+ *      on testing data as well as attempting to minimize response time
+ *      while increasing bulk throughput.  This functionality is controlled
+ *      by the InterruptThrottleRate module parameter.
+ **/
+static unsigned int igbvf_update_itr(struct igbvf_adapter *adapter,
+                                     u16 itr_setting, int packets,
+                                     int bytes)
+{
+        unsigned int retval = itr_setting;
+
+        if (packets == 0)
+                goto update_itr_done;
+
+        switch (itr_setting) {
+        case lowest_latency:
+                /* handle TSO and jumbo frames */
+                if (bytes/packets > 8000)
+                        retval = bulk_latency;
+                else if ((packets < 5) && (bytes > 512))
+                        retval = low_latency;
+                break;
+        case low_latency:  /* 50 usec aka 20000 ints/s */
+                if (bytes > 10000) {
+                        /* this if handles the TSO accounting */
+                        if (bytes/packets > 8000)
+                                retval = bulk_latency;
+                        else if ((packets < 10) || ((bytes/packets) > 1200))
+                                retval = bulk_latency;
+                        else if ((packets > 35))
+                                retval = lowest_latency;
+                } else if (bytes/packets > 2000) {
+                        retval = bulk_latency;
+                } else if (packets <= 2 && bytes < 512) {
+                        retval = lowest_latency;
+                }
+                break;
+        case bulk_latency: /* 250 usec aka 4000 ints/s */
+                if (bytes > 25000) {
+                        if (packets > 35)
+                                retval = low_latency;
+                } else if (bytes < 6000) {
+                        retval = low_latency;
+                }
+                break;
+        }
+
+update_itr_done:
+        return retval;
+}
+
+static void igbvf_set_itr(struct igbvf_adapter *adapter)
+{
+        struct e1000_hw *hw = &adapter->hw;
+        u16 current_itr;
+        u32 new_itr = adapter->itr;
+
+        adapter->tx_itr = igbvf_update_itr(adapter, adapter->tx_itr,
+                                           adapter->total_tx_packets,
+                                           adapter->total_tx_bytes);
+        /* conservative mode (itr 3) eliminates the lowest_latency setting */
+        if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
+                adapter->tx_itr = low_latency;
+
+        adapter->rx_itr = igbvf_update_itr(adapter, adapter->rx_itr,
+                                           adapter->total_rx_packets,
+                                           adapter->total_rx_bytes);
+        /* conservative mode (itr 3) eliminates the lowest_latency setting */
+        if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
+                adapter->rx_itr = low_latency;
+
+        current_itr = max(adapter->rx_itr, adapter->tx_itr);
+
+        switch (current_itr) {
+        /* counts and packets in update_itr are dependent on these numbers */
+        case lowest_latency:
+                new_itr = 70000;
+                break;
+        case low_latency:
+                new_itr = 20000; /* aka hwitr = ~200 */
+                break;
+        case bulk_latency:
+                new_itr = 4000;
+                break;
+        default:
+                break;
+        }
+
+        if (new_itr != adapter->itr) {
+                /*
+                 * this attempts to bias the interrupt rate towards Bulk
+                 * by adding intermediate steps when interrupt rate is
+                 * increasing
+                 */
+                new_itr = new_itr > adapter->itr ?
+                             min(adapter->itr + (new_itr >> 2), new_itr) :
+                             new_itr;
+                adapter->itr = new_itr;
+                adapter->rx_ring->itr_val = 1952;
+
+                if (adapter->msix_entries)
+                        adapter->rx_ring->set_itr = 1;
+                else
+                        ew32(ITR, 1952);
+        }
+}
+
+/**
+ * igbvf_clean_tx_irq - Reclaim resources after transmit completes
+ * @adapter: board private structure
+ * returns true if ring is completely cleaned
+ **/
+static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring)
+{
+        struct igbvf_adapter *adapter = tx_ring->adapter;
+        struct e1000_hw *hw = &adapter->hw;
+        struct net_device *netdev = adapter->netdev;
+        struct igbvf_buffer *buffer_info;
+        struct sk_buff *skb;
+        union e1000_adv_tx_desc *tx_desc, *eop_desc;
+        unsigned int total_bytes = 0, total_packets = 0;
+        unsigned int i, eop, count = 0;
+        bool cleaned = false;
+
+        i = tx_ring->next_to_clean;
+        eop = tx_ring->buffer_info[i].next_to_watch;
+        eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop);
+
+        while ((eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)) &&
+               (count < tx_ring->count)) {
+                for (cleaned = false; !cleaned; count++) {
+                        tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
+                        buffer_info = &tx_ring->buffer_info[i];
+                        cleaned = (i == eop);
+                        skb = buffer_info->skb;
+
+                        if (skb) {
+                                unsigned int segs, bytecount;
+
+                                /* gso_segs is currently only valid for tcp */
+                                segs = skb_shinfo(skb)->gso_segs ?: 1;
+                                /* multiply data chunks by size of headers */
+                                bytecount = ((segs - 1) * skb_headlen(skb)) +
+                                            skb->len;
+                                total_packets += segs;
+                                total_bytes += bytecount;
+                        }
+
+                        igbvf_put_txbuf(adapter, buffer_info);
+                        tx_desc->wb.status = 0;
+
+                        i++;
+                        if (i == tx_ring->count)
+                                i = 0;
+                }
+                eop = tx_ring->buffer_info[i].next_to_watch;
+                eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop);
+        }
+
+        tx_ring->next_to_clean = i;
+
+        if (unlikely(count &&
+                     netif_carrier_ok(netdev) &&
+                     igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) {
+                /* Make sure that anybody stopping the queue after this
+                 * sees the new next_to_clean.
+                 */
+                smp_mb();
+                if (netif_queue_stopped(netdev) &&
+                    !(test_bit(__IGBVF_DOWN, &adapter->state))) {
+                        netif_wake_queue(netdev);
+                        ++adapter->restart_queue;
+                }
+        }
+
+        if (adapter->detect_tx_hung) {
+                /* Detect a transmit hang in hardware, this serializes the
+                 * check with the clearing of time_stamp and movement of i */
+                adapter->detect_tx_hung = false;
+                if (tx_ring->buffer_info[i].time_stamp &&
+                    time_after(jiffies, tx_ring->buffer_info[i].time_stamp +
+                               (adapter->tx_timeout_factor * HZ))
+                    && !(er32(STATUS) & E1000_STATUS_TXOFF)) {
+
+                        tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
+                        /* detected Tx unit hang */
+                        igbvf_print_tx_hang(adapter);
+
+                        netif_stop_queue(netdev);
+                }
+        }
+        adapter->net_stats.tx_bytes += total_bytes;
+        adapter->net_stats.tx_packets += total_packets;
+        return (count < tx_ring->count);
+}
+
+static irqreturn_t igbvf_msix_other(int irq, void *data)
+{
+        struct net_device *netdev = data;
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+        struct e1000_hw *hw = &adapter->hw;
+
+        adapter->int_counter1++;
+
+        netif_carrier_off(netdev);
+        hw->mac.get_link_status = 1;
+        if (!test_bit(__IGBVF_DOWN, &adapter->state))
+                mod_timer(&adapter->watchdog_timer, jiffies + 1);
+
+        ew32(EIMS, adapter->eims_other);
+
+        return IRQ_HANDLED;
+}
+
+static irqreturn_t igbvf_intr_msix_tx(int irq, void *data)
+{
+        struct net_device *netdev = data;
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+        struct e1000_hw *hw = &adapter->hw;
+        struct igbvf_ring *tx_ring = adapter->tx_ring;
+
+
+        adapter->total_tx_bytes = 0;
+        adapter->total_tx_packets = 0;
+
+        /* auto mask will automatically reenable the interrupt when we write
+         * EICS */
+        if (!igbvf_clean_tx_irq(tx_ring))
+                /* Ring was not completely cleaned, so fire another interrupt */
+                ew32(EICS, tx_ring->eims_value);
+        else
+                ew32(EIMS, tx_ring->eims_value);
+
+        return IRQ_HANDLED;
+}
+
+static irqreturn_t igbvf_intr_msix_rx(int irq, void *data)
+{
+        struct net_device *netdev = data;
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+
+        adapter->int_counter0++;
+
+        /* Write the ITR value calculated at the end of the
+         * previous interrupt.
+         */
+        if (adapter->rx_ring->set_itr) {
+                writel(adapter->rx_ring->itr_val,
+                       adapter->hw.hw_addr + adapter->rx_ring->itr_register);
+                adapter->rx_ring->set_itr = 0;
+        }
+
+        if (napi_schedule_prep(&adapter->rx_ring->napi)) {
+                adapter->total_rx_bytes = 0;
+                adapter->total_rx_packets = 0;
+                __napi_schedule(&adapter->rx_ring->napi);
+        }
+
+        return IRQ_HANDLED;
+}
+
+#define IGBVF_NO_QUEUE -1
+
+static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue,
+                                int tx_queue, int msix_vector)
+{
+        struct e1000_hw *hw = &adapter->hw;
+        u32 ivar, index;
+
+        /* 82576 uses a table-based method for assigning vectors.
+           Each queue has a single entry in the table to which we write
+           a vector number along with a "valid" bit.  Sadly, the layout
+           of the table is somewhat counterintuitive. */
+        if (rx_queue > IGBVF_NO_QUEUE) {
+                index = (rx_queue >> 1);
+                ivar = array_er32(IVAR0, index);
+                if (rx_queue & 0x1) {
+                        /* vector goes into third byte of register */
+                        ivar = ivar & 0xFF00FFFF;
+                        ivar |= (msix_vector | E1000_IVAR_VALID) << 16;
+                } else {
+                        /* vector goes into low byte of register */
+                        ivar = ivar & 0xFFFFFF00;
+                        ivar |= msix_vector | E1000_IVAR_VALID;
+                }
+                adapter->rx_ring[rx_queue].eims_value = 1 << msix_vector;
+                array_ew32(IVAR0, index, ivar);
+        }
+        if (tx_queue > IGBVF_NO_QUEUE) {
+                index = (tx_queue >> 1);
+                ivar = array_er32(IVAR0, index);
+                if (tx_queue & 0x1) {
+                        /* vector goes into high byte of register */
+                        ivar = ivar & 0x00FFFFFF;
+                        ivar |= (msix_vector | E1000_IVAR_VALID) << 24;
+                } else {
+                        /* vector goes into second byte of register */
+                        ivar = ivar & 0xFFFF00FF;
+                        ivar |= (msix_vector | E1000_IVAR_VALID) << 8;
+                }
+                adapter->tx_ring[tx_queue].eims_value = 1 << msix_vector;
+                array_ew32(IVAR0, index, ivar);
+        }
+}
+
+/**
+ * igbvf_configure_msix - Configure MSI-X hardware
+ *
+ * igbvf_configure_msix sets up the hardware to properly
+ * generate MSI-X interrupts.
+ **/
+static void igbvf_configure_msix(struct igbvf_adapter *adapter)
+{
+        u32 tmp;
+        struct e1000_hw *hw = &adapter->hw;
+        struct igbvf_ring *tx_ring = adapter->tx_ring;
+        struct igbvf_ring *rx_ring = adapter->rx_ring;
+        int vector = 0;
+
+        adapter->eims_enable_mask = 0;
+
+        igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++);
+        adapter->eims_enable_mask |= tx_ring->eims_value;
+        if (tx_ring->itr_val)
+                writel(tx_ring->itr_val,
+                       hw->hw_addr + tx_ring->itr_register);
+        else
+                writel(1952, hw->hw_addr + tx_ring->itr_register);
+
+        igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++);
+        adapter->eims_enable_mask |= rx_ring->eims_value;
+        if (rx_ring->itr_val)
+                writel(rx_ring->itr_val,
+                       hw->hw_addr + rx_ring->itr_register);
+        else
+                writel(1952, hw->hw_addr + rx_ring->itr_register);
+
+        /* set vector for other causes, i.e. link changes */
+
+        tmp = (vector++ | E1000_IVAR_VALID);
+
+        ew32(IVAR_MISC, tmp);
+
+        adapter->eims_enable_mask = (1 << (vector)) - 1;
+        adapter->eims_other = 1 << (vector - 1);
+        e1e_flush();
+}
+
+static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter)
+{
+        if (adapter->msix_entries) {
+                pci_disable_msix(adapter->pdev);
+                kfree(adapter->msix_entries);
+                adapter->msix_entries = NULL;
+        }
+}
+
+/**
+ * igbvf_set_interrupt_capability - set MSI or MSI-X if supported
+ *
+ * Attempt to configure interrupts using the best available
+ * capabilities of the hardware and kernel.
+ **/
+static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter)
+{
+        int err = -ENOMEM;
+        int i;
+
+        /* we allocate 3 vectors, 1 for tx, 1 for rx, one for pf messages */
+        adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry),
+                                        GFP_KERNEL);
+        if (adapter->msix_entries) {
+                for (i = 0; i < 3; i++)
+                        adapter->msix_entries[i].entry = i;
+
+                err = pci_enable_msix(adapter->pdev,
+                                      adapter->msix_entries, 3);
+        }
+
+        if (err) {
+                /* MSI-X failed */
+                dev_err(&adapter->pdev->dev,
+                        "Failed to initialize MSI-X interrupts.\n");
+                igbvf_reset_interrupt_capability(adapter);
+        }
+}
+
+/**
+ * igbvf_request_msix - Initialize MSI-X interrupts
+ *
+ * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the
+ * kernel.
+ **/
+static int igbvf_request_msix(struct igbvf_adapter *adapter)
+{
+        struct net_device *netdev = adapter->netdev;
+        int err = 0, vector = 0;
+
+        if (strlen(netdev->name) < (IFNAMSIZ - 5)) {
+                sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
+                sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
+        } else {
+                memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
+                memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
+        }
+
+        err = request_irq(adapter->msix_entries[vector].vector,
+                          &igbvf_intr_msix_tx, 0, adapter->tx_ring->name,
+                          netdev);
+        if (err)
+                goto out;
+
+        adapter->tx_ring->itr_register = E1000_EITR(vector);
+        adapter->tx_ring->itr_val = 1952;
+        vector++;
+
+        err = request_irq(adapter->msix_entries[vector].vector,
+                          &igbvf_intr_msix_rx, 0, adapter->rx_ring->name,
+                          netdev);
+        if (err)
+                goto out;
+
+        adapter->rx_ring->itr_register = E1000_EITR(vector);
+        adapter->rx_ring->itr_val = 1952;
+        vector++;
+
+        err = request_irq(adapter->msix_entries[vector].vector,
+                          &igbvf_msix_other, 0, netdev->name, netdev);
+        if (err)
+                goto out;
+
+        igbvf_configure_msix(adapter);
+        return 0;
+out:
+        return err;
+}
+
+/**
+ * igbvf_alloc_queues - Allocate memory for all rings
+ * @adapter: board private structure to initialize
+ **/
+static int __devinit igbvf_alloc_queues(struct igbvf_adapter *adapter)
+{
+        struct net_device *netdev = adapter->netdev;
+
+        adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
+        if (!adapter->tx_ring)
+                return -ENOMEM;
+
+        adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
+        if (!adapter->rx_ring) {
+                kfree(adapter->tx_ring);
+                return -ENOMEM;
+        }
+
+        netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64);
+
+        return 0;
+}
+
+/**
+ * igbvf_request_irq - initialize interrupts
+ *
+ * Attempts to configure interrupts using the best available
+ * capabilities of the hardware and kernel.
+ **/
+static int igbvf_request_irq(struct igbvf_adapter *adapter)
+{
+        int err = -1;
+
+        /* igbvf supports msi-x only */
+        if (adapter->msix_entries)
+                err = igbvf_request_msix(adapter);
+
+        if (!err)
+                return err;
+
+        dev_err(&adapter->pdev->dev,
+                "Unable to allocate interrupt, Error: %d\n", err);
+
+        return err;
+}
+
+static void igbvf_free_irq(struct igbvf_adapter *adapter)
+{
+        struct net_device *netdev = adapter->netdev;
+        int vector;
+
+        if (adapter->msix_entries) {
+                for (vector = 0; vector < 3; vector++)
+                        free_irq(adapter->msix_entries[vector].vector, netdev);
+        }
+}
+
+/**
+ * igbvf_irq_disable - Mask off interrupt generation on the NIC
+ **/
+static void igbvf_irq_disable(struct igbvf_adapter *adapter)
+{
+        struct e1000_hw *hw = &adapter->hw;
+
+        ew32(EIMC, ~0);
+
+        if (adapter->msix_entries)
+                ew32(EIAC, 0);
+}
+
+/**
+ * igbvf_irq_enable - Enable default interrupt generation settings
+ **/
+static void igbvf_irq_enable(struct igbvf_adapter *adapter)
+{
+        struct e1000_hw *hw = &adapter->hw;
+
+        ew32(EIAC, adapter->eims_enable_mask);
+        ew32(EIAM, adapter->eims_enable_mask);
+        ew32(EIMS, adapter->eims_enable_mask);
+}
+
+/**
+ * igbvf_poll - NAPI Rx polling callback
+ * @napi: struct associated with this polling callback
+ * @budget: amount of packets driver is allowed to process this poll
+ **/
+static int igbvf_poll(struct napi_struct *napi, int budget)
+{
+        struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi);
+        struct igbvf_adapter *adapter = rx_ring->adapter;
+        struct e1000_hw *hw = &adapter->hw;
+        int work_done = 0;
+
+        igbvf_clean_rx_irq(adapter, &work_done, budget);
+
+        /* If not enough Rx work done, exit the polling mode */
+        if (work_done < budget) {
+                napi_complete(napi);
+
+                if (adapter->itr_setting & 3)
+                        igbvf_set_itr(adapter);
+
+                if (!test_bit(__IGBVF_DOWN, &adapter->state))
+                        ew32(EIMS, adapter->rx_ring->eims_value);
+        }
+
+        return work_done;
+}
+
+/**
+ * igbvf_set_rlpml - set receive large packet maximum length
+ * @adapter: board private structure
+ *
+ * Configure the maximum size of packets that will be received
+ */
+static void igbvf_set_rlpml(struct igbvf_adapter *adapter)
+{
+        int max_frame_size = adapter->max_frame_size;
+        struct e1000_hw *hw = &adapter->hw;
+
+        if (adapter->vlgrp)
+                max_frame_size += VLAN_TAG_SIZE;
+
+        e1000_rlpml_set_vf(hw, max_frame_size);
+}
+
+static void igbvf_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
+{
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+        struct e1000_hw *hw = &adapter->hw;
+
+        if (hw->mac.ops.set_vfta(hw, vid, true))
+                dev_err(&adapter->pdev->dev, "Failed to add vlan id %d\n", vid);
+}
+
+static void igbvf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
+{
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+        struct e1000_hw *hw = &adapter->hw;
+
+        igbvf_irq_disable(adapter);
+        vlan_group_set_device(adapter->vlgrp, vid, NULL);
+
+        if (!test_bit(__IGBVF_DOWN, &adapter->state))
+                igbvf_irq_enable(adapter);
+
+        if (hw->mac.ops.set_vfta(hw, vid, false))
+                dev_err(&adapter->pdev->dev,
+                        "Failed to remove vlan id %d\n", vid);
+}
+
+static void igbvf_vlan_rx_register(struct net_device *netdev,
+                                   struct vlan_group *grp)
+{
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+
+        adapter->vlgrp = grp;
+}
+
+static void igbvf_restore_vlan(struct igbvf_adapter *adapter)
+{
+        u16 vid;
+
+        if (!adapter->vlgrp)
+                return;
+
+        for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
+                if (!vlan_group_get_device(adapter->vlgrp, vid))
+                        continue;
+                igbvf_vlan_rx_add_vid(adapter->netdev, vid);
+        }
+
+        igbvf_set_rlpml(adapter);
+}
+
+/**
+ * igbvf_configure_tx - Configure Transmit Unit after Reset
+ * @adapter: board private structure
+ *
+ * Configure the Tx unit of the MAC after a reset.
+ **/
+static void igbvf_configure_tx(struct igbvf_adapter *adapter)
+{
+        struct e1000_hw *hw = &adapter->hw;
+        struct igbvf_ring *tx_ring = adapter->tx_ring;
+        u64 tdba;
+        u32 txdctl, dca_txctrl;
+
+        /* disable transmits */
+        txdctl = er32(TXDCTL(0));
+        ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
+        msleep(10);
+
+        /* Setup the HW Tx Head and Tail descriptor pointers */
+        ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc));
+        tdba = tx_ring->dma;
+        ew32(TDBAL(0), (tdba & DMA_32BIT_MASK));
+        ew32(TDBAH(0), (tdba >> 32));
+        ew32(TDH(0), 0);
+        ew32(TDT(0), 0);
+        tx_ring->head = E1000_TDH(0);
+        tx_ring->tail = E1000_TDT(0);
+
+        /* Turn off Relaxed Ordering on head write-backs.  The writebacks
+         * MUST be delivered in order or it will completely screw up
+         * our bookeeping.
+         */
+        dca_txctrl = er32(DCA_TXCTRL(0));
+        dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN;
+        ew32(DCA_TXCTRL(0), dca_txctrl);
+
+        /* enable transmits */
+        txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
+        ew32(TXDCTL(0), txdctl);
+
+        /* Setup Transmit Descriptor Settings for eop descriptor */
+        adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS;
+
+        /* enable Report Status bit */
+        adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS;
+
+        adapter->tx_queue_len = adapter->netdev->tx_queue_len;
+}
+
+/**
+ * igbvf_setup_srrctl - configure the receive control registers
+ * @adapter: Board private structure
+ **/
+static void igbvf_setup_srrctl(struct igbvf_adapter *adapter)
+{
+        struct e1000_hw *hw = &adapter->hw;
+        u32 srrctl = 0;
+
+        srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK |
+                    E1000_SRRCTL_BSIZEHDR_MASK |
+                    E1000_SRRCTL_BSIZEPKT_MASK);
+
+        /* Enable queue drop to avoid head of line blocking */
+        srrctl |= E1000_SRRCTL_DROP_EN;
+
+        /* Setup buffer sizes */
+        srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >>
+                  E1000_SRRCTL_BSIZEPKT_SHIFT;
+
+        if (adapter->rx_buffer_len < 2048) {
+                adapter->rx_ps_hdr_size = 0;
+                srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
+        } else {
+                adapter->rx_ps_hdr_size = 128;
+                srrctl |= adapter->rx_ps_hdr_size <<
+                          E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
+                srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
+        }
+
+        ew32(SRRCTL(0), srrctl);
+}
+
+/**
+ * igbvf_configure_rx - Configure Receive Unit after Reset
+ * @adapter: board private structure
+ *
+ * Configure the Rx unit of the MAC after a reset.
+ **/
+static void igbvf_configure_rx(struct igbvf_adapter *adapter)
+{
+        struct e1000_hw *hw = &adapter->hw;
+        struct igbvf_ring *rx_ring = adapter->rx_ring;
+        u64 rdba;
+        u32 rdlen, rxdctl;
+
+        /* disable receives */
+        rxdctl = er32(RXDCTL(0));
+        ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
+        msleep(10);
+
+        rdlen = rx_ring->count * sizeof(union e1000_adv_rx_desc);
+
+        /*
+         * Setup the HW Rx Head and Tail Descriptor Pointers and
+         * the Base and Length of the Rx Descriptor Ring
+         */
+        rdba = rx_ring->dma;
+        ew32(RDBAL(0), (rdba & DMA_32BIT_MASK));
+        ew32(RDBAH(0), (rdba >> 32));
+        ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc));
+        rx_ring->head = E1000_RDH(0);
+        rx_ring->tail = E1000_RDT(0);
+        ew32(RDH(0), 0);
+        ew32(RDT(0), 0);
+
+        rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
+        rxdctl &= 0xFFF00000;
+        rxdctl |= IGBVF_RX_PTHRESH;
+        rxdctl |= IGBVF_RX_HTHRESH << 8;
+        rxdctl |= IGBVF_RX_WTHRESH << 16;
+
+        igbvf_set_rlpml(adapter);
+
+        /* enable receives */
+        ew32(RXDCTL(0), rxdctl);
+}
+
+/**
+ * igbvf_set_multi - Multicast and Promiscuous mode set
+ * @netdev: network interface device structure
+ *
+ * The set_multi entry point is called whenever the multicast address
+ * list or the network interface flags are updated.  This routine is
+ * responsible for configuring the hardware for proper multicast,
+ * promiscuous mode, and all-multi behavior.
+ **/
+static void igbvf_set_multi(struct net_device *netdev)
+{
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+        struct e1000_hw *hw = &adapter->hw;
+        struct dev_mc_list *mc_ptr;
+        u8  *mta_list = NULL;
+        int i;
+
+        if (netdev->mc_count) {
+                mta_list = kmalloc(netdev->mc_count * 6, GFP_ATOMIC);
+                if (!mta_list) {
+                        dev_err(&adapter->pdev->dev,
+                                "failed to allocate multicast filter list\n");
+                        return;
+                }
+        }
+
+        /* prepare a packed array of only addresses. */
+        mc_ptr = netdev->mc_list;
+
+        for (i = 0; i < netdev->mc_count; i++) {
+                if (!mc_ptr)
+                        break;
+                memcpy(mta_list + (i*ETH_ALEN), mc_ptr->dmi_addr,
+                       ETH_ALEN);
+                mc_ptr = mc_ptr->next;
+        }
+
+        hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0);
+        kfree(mta_list);
+}
+
+/**
+ * igbvf_configure - configure the hardware for Rx and Tx
+ * @adapter: private board structure
+ **/
+static void igbvf_configure(struct igbvf_adapter *adapter)
+{
+        igbvf_set_multi(adapter->netdev);
+
+        igbvf_restore_vlan(adapter);
+
+        igbvf_configure_tx(adapter);
+        igbvf_setup_srrctl(adapter);
+        igbvf_configure_rx(adapter);
+        igbvf_alloc_rx_buffers(adapter->rx_ring,
+                               igbvf_desc_unused(adapter->rx_ring));
+}
+
+/* igbvf_reset - bring the hardware into a known good state
+ *
+ * This function boots the hardware and enables some settings that
+ * require a configuration cycle of the hardware - those cannot be
+ * set/changed during runtime. After reset the device needs to be
+ * properly configured for Rx, Tx etc.
+ */
+static void igbvf_reset(struct igbvf_adapter *adapter)
+{
+        struct e1000_mac_info *mac = &adapter->hw.mac;
+        struct net_device *netdev = adapter->netdev;
+        struct e1000_hw *hw = &adapter->hw;
+
+        /* Allow time for pending master requests to run */
+        if (mac->ops.reset_hw(hw))
+                dev_err(&adapter->pdev->dev, "PF still resetting\n");
+
+        mac->ops.init_hw(hw);
+
+        if (is_valid_ether_addr(adapter->hw.mac.addr)) {
+                memcpy(netdev->dev_addr, adapter->hw.mac.addr,
+                       netdev->addr_len);
+                memcpy(netdev->perm_addr, adapter->hw.mac.addr,
+                       netdev->addr_len);
+        }
+}
+
+int igbvf_up(struct igbvf_adapter *adapter)
+{
+        struct e1000_hw *hw = &adapter->hw;
+
+        /* hardware has been reset, we need to reload some things */
+        igbvf_configure(adapter);
+
+        clear_bit(__IGBVF_DOWN, &adapter->state);
+
+        napi_enable(&adapter->rx_ring->napi);
+        if (adapter->msix_entries)
+                igbvf_configure_msix(adapter);
+
+        /* Clear any pending interrupts. */
+        er32(EICR);
+        igbvf_irq_enable(adapter);
+
+        /* start the watchdog */
+        hw->mac.get_link_status = 1;
+        mod_timer(&adapter->watchdog_timer, jiffies + 1);
+
+
+        return 0;
+}
+
+void igbvf_down(struct igbvf_adapter *adapter)
+{
+        struct net_device *netdev = adapter->netdev;
+        struct e1000_hw *hw = &adapter->hw;
+        u32 rxdctl, txdctl;
+
+        /*
+         * signal that we're down so the interrupt handler does not
+         * reschedule our watchdog timer
+         */
+        set_bit(__IGBVF_DOWN, &adapter->state);
+
+        /* disable receives in the hardware */
+        rxdctl = er32(RXDCTL(0));
+        ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
+
+        netif_stop_queue(netdev);
+
+        /* disable transmits in the hardware */
+        txdctl = er32(TXDCTL(0));
+        ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
+
+        /* flush both disables and wait for them to finish */
+        e1e_flush();
+        msleep(10);
+
+        napi_disable(&adapter->rx_ring->napi);
+
+        igbvf_irq_disable(adapter);
+
+        del_timer_sync(&adapter->watchdog_timer);
+
+        netdev->tx_queue_len = adapter->tx_queue_len;
+        netif_carrier_off(netdev);
+
+        /* record the stats before reset*/
+        igbvf_update_stats(adapter);
+
+        adapter->link_speed = 0;
+        adapter->link_duplex = 0;
+
+        igbvf_reset(adapter);
+        igbvf_clean_tx_ring(adapter->tx_ring);
+        igbvf_clean_rx_ring(adapter->rx_ring);
+}
+
+void igbvf_reinit_locked(struct igbvf_adapter *adapter)
+{
+        might_sleep();
+        while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
+                msleep(1);
+        igbvf_down(adapter);
+        igbvf_up(adapter);
+        clear_bit(__IGBVF_RESETTING, &adapter->state);
+}
+
+/**
+ * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
+ * @adapter: board private structure to initialize
+ *
+ * igbvf_sw_init initializes the Adapter private data structure.
+ * Fields are initialized based on PCI device information and
+ * OS network device settings (MTU size).
+ **/
+static int __devinit igbvf_sw_init(struct igbvf_adapter *adapter)
+{
+        struct net_device *netdev = adapter->netdev;
+        s32 rc;
+
+        adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
+        adapter->rx_ps_hdr_size = 0;
+        adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
+        adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
+
+        adapter->tx_int_delay = 8;
+        adapter->tx_abs_int_delay = 32;
+        adapter->rx_int_delay = 0;
+        adapter->rx_abs_int_delay = 8;
+        adapter->itr_setting = 3;
+        adapter->itr = 20000;
+
+        /* Set various function pointers */
+        adapter->ei->init_ops(&adapter->hw);
+
+        rc = adapter->hw.mac.ops.init_params(&adapter->hw);
+        if (rc)
+                return rc;
+
+        rc = adapter->hw.mbx.ops.init_params(&adapter->hw);
+        if (rc)
+                return rc;
+
+        igbvf_set_interrupt_capability(adapter);
+
+        if (igbvf_alloc_queues(adapter))
+                return -ENOMEM;
+
+        spin_lock_init(&adapter->tx_queue_lock);
+
+        /* Explicitly disable IRQ since the NIC can be in any state. */
+        igbvf_irq_disable(adapter);
+
+        spin_lock_init(&adapter->stats_lock);
+
+        set_bit(__IGBVF_DOWN, &adapter->state);
+        return 0;
+}
+
+static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter)
+{
+        struct e1000_hw *hw = &adapter->hw;
+
+        adapter->stats.last_gprc = er32(VFGPRC);
+        adapter->stats.last_gorc = er32(VFGORC);
+        adapter->stats.last_gptc = er32(VFGPTC);
+        adapter->stats.last_gotc = er32(VFGOTC);
+        adapter->stats.last_mprc = er32(VFMPRC);
+        adapter->stats.last_gotlbc = er32(VFGOTLBC);
+        adapter->stats.last_gptlbc = er32(VFGPTLBC);
+        adapter->stats.last_gorlbc = er32(VFGORLBC);
+        adapter->stats.last_gprlbc = er32(VFGPRLBC);
+
+        adapter->stats.base_gprc = er32(VFGPRC);
+        adapter->stats.base_gorc = er32(VFGORC);
+        adapter->stats.base_gptc = er32(VFGPTC);
+        adapter->stats.base_gotc = er32(VFGOTC);
+        adapter->stats.base_mprc = er32(VFMPRC);
+        adapter->stats.base_gotlbc = er32(VFGOTLBC);
+        adapter->stats.base_gptlbc = er32(VFGPTLBC);
+        adapter->stats.base_gorlbc = er32(VFGORLBC);
+        adapter->stats.base_gprlbc = er32(VFGPRLBC);
+}
+
+/**
+ * igbvf_open - Called when a network interface is made active
+ * @netdev: network interface device structure
+ *
+ * Returns 0 on success, negative value on failure
+ *
+ * The open entry point is called when a network interface is made
+ * active by the system (IFF_UP).  At this point all resources needed
+ * for transmit and receive operations are allocated, the interrupt
+ * handler is registered with the OS, the watchdog timer is started,
+ * and the stack is notified that the interface is ready.
+ **/
+static int igbvf_open(struct net_device *netdev)
+{
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+        struct e1000_hw *hw = &adapter->hw;
+        int err;
+
+        /* disallow open during test */
+        if (test_bit(__IGBVF_TESTING, &adapter->state))
+                return -EBUSY;
+
+        /* allocate transmit descriptors */
+        err = igbvf_setup_tx_resources(adapter, adapter->tx_ring);
+        if (err)
+                goto err_setup_tx;
+
+        /* allocate receive descriptors */
+        err = igbvf_setup_rx_resources(adapter, adapter->rx_ring);
+        if (err)
+                goto err_setup_rx;
+
+        /*
+         * before we allocate an interrupt, we must be ready to handle it.
+         * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
+         * as soon as we call pci_request_irq, so we have to setup our
+         * clean_rx handler before we do so.
+         */
+        igbvf_configure(adapter);
+
+        err = igbvf_request_irq(adapter);
+        if (err)
+                goto err_req_irq;
+
+        /* From here on the code is the same as igbvf_up() */
+        clear_bit(__IGBVF_DOWN, &adapter->state);
+
+        napi_enable(&adapter->rx_ring->napi);
+
+        /* clear any pending interrupts */
+        er32(EICR);
+
+        igbvf_irq_enable(adapter);
+
+        /* start the watchdog */
+        hw->mac.get_link_status = 1;
+        mod_timer(&adapter->watchdog_timer, jiffies + 1);
+
+        return 0;
+
+err_req_irq:
+        igbvf_free_rx_resources(adapter->rx_ring);
+err_setup_rx:
+        igbvf_free_tx_resources(adapter->tx_ring);
+err_setup_tx:
+        igbvf_reset(adapter);
+
+        return err;
+}
+
+/**
+ * igbvf_close - Disables a network interface
+ * @netdev: network interface device structure
+ *
+ * Returns 0, this is not allowed to fail
+ *
+ * The close entry point is called when an interface is de-activated
+ * by the OS.  The hardware is still under the drivers control, but
+ * needs to be disabled.  A global MAC reset is issued to stop the
+ * hardware, and all transmit and receive resources are freed.
+ **/
+static int igbvf_close(struct net_device *netdev)
+{
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+
+        WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
+        igbvf_down(adapter);
+
+        igbvf_free_irq(adapter);
+
+        igbvf_free_tx_resources(adapter->tx_ring);
+        igbvf_free_rx_resources(adapter->rx_ring);
+
+        return 0;
+}
+/**
+ * igbvf_set_mac - Change the Ethernet Address of the NIC
+ * @netdev: network interface device structure
+ * @p: pointer to an address structure
+ *
+ * Returns 0 on success, negative on failure
+ **/
+static int igbvf_set_mac(struct net_device *netdev, void *p)
+{
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+        struct e1000_hw *hw = &adapter->hw;
+        struct sockaddr *addr = p;
+
+        if (!is_valid_ether_addr(addr->sa_data))
+                return -EADDRNOTAVAIL;
+
+        memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
+
+        hw->mac.ops.rar_set(hw, hw->mac.addr, 0);
+
+        if (memcmp(addr->sa_data, hw->mac.addr, 6))
+                return -EADDRNOTAVAIL;
+
+        memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
+
+        return 0;
+}
+
+#define UPDATE_VF_COUNTER(reg, name)                                    \
+        {                                                               \
+                u32 current_counter = er32(reg);                        \
+                if (current_counter < adapter->stats.last_##name)       \
+                        adapter->stats.name += 0x100000000LL;           \
+                adapter->stats.last_##name = current_counter;           \
+                adapter->stats.name &= 0xFFFFFFFF00000000LL;            \
+                adapter->stats.name |= current_counter;                 \
+        }
+
+/**
+ * igbvf_update_stats - Update the board statistics counters
+ * @adapter: board private structure
+**/
+void igbvf_update_stats(struct igbvf_adapter *adapter)
+{
+        struct e1000_hw *hw = &adapter->hw;
+        struct pci_dev *pdev = adapter->pdev;
+
+        /*
+         * Prevent stats update while adapter is being reset, link is down
+         * or if the pci connection is down.
+         */
+        if (adapter->link_speed == 0)
+                return;
+
+        if (test_bit(__IGBVF_RESETTING, &adapter->state))
+                return;
+
+        if (pci_channel_offline(pdev))
+                return;
+
+        UPDATE_VF_COUNTER(VFGPRC, gprc);
+        UPDATE_VF_COUNTER(VFGORC, gorc);
+        UPDATE_VF_COUNTER(VFGPTC, gptc);
+        UPDATE_VF_COUNTER(VFGOTC, gotc);
+        UPDATE_VF_COUNTER(VFMPRC, mprc);
+        UPDATE_VF_COUNTER(VFGOTLBC, gotlbc);
+        UPDATE_VF_COUNTER(VFGPTLBC, gptlbc);
+        UPDATE_VF_COUNTER(VFGORLBC, gorlbc);
+        UPDATE_VF_COUNTER(VFGPRLBC, gprlbc);
+
+        /* Fill out the OS statistics structure */
+        adapter->net_stats.multicast = adapter->stats.mprc;
+}
+
+static void igbvf_print_link_info(struct igbvf_adapter *adapter)
+{
+        dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s\n",
+                 adapter->link_speed,
+                 ((adapter->link_duplex == FULL_DUPLEX) ?
+                  "Full Duplex" : "Half Duplex"));
+}
+
+static bool igbvf_has_link(struct igbvf_adapter *adapter)
+{
+        struct e1000_hw *hw = &adapter->hw;
+        s32 ret_val = E1000_SUCCESS;
+        bool link_active;
+
+        ret_val = hw->mac.ops.check_for_link(hw);
+        link_active = !hw->mac.get_link_status;
+
+        /* if check for link returns error we will need to reset */
+        if (ret_val)
+                schedule_work(&adapter->reset_task);
+
+        return link_active;
+}
+
+/**
+ * igbvf_watchdog - Timer Call-back
+ * @data: pointer to adapter cast into an unsigned long
+ **/
+static void igbvf_watchdog(unsigned long data)
+{
+        struct igbvf_adapter *adapter = (struct igbvf_adapter *) data;
+
+        /* Do the rest outside of interrupt context */
+        schedule_work(&adapter->watchdog_task);
+}
+
+static void igbvf_watchdog_task(struct work_struct *work)
+{
+        struct igbvf_adapter *adapter = container_of(work,
+                                                     struct igbvf_adapter,
+                                                     watchdog_task);
+        struct net_device *netdev = adapter->netdev;
+        struct e1000_mac_info *mac = &adapter->hw.mac;
+        struct igbvf_ring *tx_ring = adapter->tx_ring;
+        struct e1000_hw *hw = &adapter->hw;
+        u32 link;
+        int tx_pending = 0;
+
+        link = igbvf_has_link(adapter);
+
+        if (link) {
+                if (!netif_carrier_ok(netdev)) {
+                        bool txb2b = 1;
+
+                        mac->ops.get_link_up_info(&adapter->hw,
+                                                  &adapter->link_speed,
+                                                  &adapter->link_duplex);
+                        igbvf_print_link_info(adapter);
+
+                        /*
+                         * tweak tx_queue_len according to speed/duplex
+                         * and adjust the timeout factor
+                         */
+                        netdev->tx_queue_len = adapter->tx_queue_len;
+                        adapter->tx_timeout_factor = 1;
+                        switch (adapter->link_speed) {
+                        case SPEED_10:
+                                txb2b = 0;
+                                netdev->tx_queue_len = 10;
+                                adapter->tx_timeout_factor = 16;
+                                break;
+                        case SPEED_100:
+                                txb2b = 0;
+                                netdev->tx_queue_len = 100;
+                                /* maybe add some timeout factor ? */
+                                break;
+                        }
+
+                        netif_carrier_on(netdev);
+                        netif_wake_queue(netdev);
+                }
+        } else {
+                if (netif_carrier_ok(netdev)) {
+                        adapter->link_speed = 0;
+                        adapter->link_duplex = 0;
+                        dev_info(&adapter->pdev->dev, "Link is Down\n");
+                        netif_carrier_off(netdev);
+                        netif_stop_queue(netdev);
+                }
+        }
+
+        if (netif_carrier_ok(netdev)) {
+                igbvf_update_stats(adapter);
+        } else {
+                tx_pending = (igbvf_desc_unused(tx_ring) + 1 <
+                              tx_ring->count);
+                if (tx_pending) {
+                        /*
+                         * We've lost link, so the controller stops DMA,
+                         * but we've got queued Tx work that's never going
+                         * to get done, so reset controller to flush Tx.
+                         * (Do the reset outside of interrupt context).
+                         */
+                        adapter->tx_timeout_count++;
+                        schedule_work(&adapter->reset_task);
+                }
+        }
+
+        /* Cause software interrupt to ensure Rx ring is cleaned */
+        ew32(EICS, adapter->rx_ring->eims_value);
+
+        /* Force detection of hung controller every watchdog period */
+        adapter->detect_tx_hung = 1;
+
+        /* Reset the timer */
+        if (!test_bit(__IGBVF_DOWN, &adapter->state))
+                mod_timer(&adapter->watchdog_timer,
+                          round_jiffies(jiffies + (2 * HZ)));
+}
+
+#define IGBVF_TX_FLAGS_CSUM             0x00000001
+#define IGBVF_TX_FLAGS_VLAN             0x00000002
+#define IGBVF_TX_FLAGS_TSO              0x00000004
+#define IGBVF_TX_FLAGS_IPV4             0x00000008
+#define IGBVF_TX_FLAGS_VLAN_MASK        0xffff0000
+#define IGBVF_TX_FLAGS_VLAN_SHIFT       16
+
+static int igbvf_tso(struct igbvf_adapter *adapter,
+                     struct igbvf_ring *tx_ring,
+                     struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
+{
+        struct e1000_adv_tx_context_desc *context_desc;
+        unsigned int i;
+        int err;
+        struct igbvf_buffer *buffer_info;
+        u32 info = 0, tu_cmd = 0;
+        u32 mss_l4len_idx, l4len;
+        *hdr_len = 0;
+
+        if (skb_header_cloned(skb)) {
+                err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
+                if (err) {
+                        dev_err(&adapter->pdev->dev,
+                                "igbvf_tso returning an error\n");
+                        return err;
+                }
+        }
+
+        l4len = tcp_hdrlen(skb);
+        *hdr_len += l4len;
+
+        if (skb->protocol == htons(ETH_P_IP)) {
+                struct iphdr *iph = ip_hdr(skb);
+                iph->tot_len = 0;
+                iph->check = 0;
+                tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
+                                                         iph->daddr, 0,
+                                                         IPPROTO_TCP,
+                                                         0);
+        } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
+                ipv6_hdr(skb)->payload_len = 0;
+                tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
+                                                       &ipv6_hdr(skb)->daddr,
+                                                       0, IPPROTO_TCP, 0);
+        }
+
+        i = tx_ring->next_to_use;
+
+        buffer_info = &tx_ring->buffer_info[i];
+        context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
+        /* VLAN MACLEN IPLEN */
+        if (tx_flags & IGBVF_TX_FLAGS_VLAN)
+                info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK);
+        info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
+        *hdr_len += skb_network_offset(skb);
+        info |= (skb_transport_header(skb) - skb_network_header(skb));
+        *hdr_len += (skb_transport_header(skb) - skb_network_header(skb));
+        context_desc->vlan_macip_lens = cpu_to_le32(info);
+
+        /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
+        tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
+
+        if (skb->protocol == htons(ETH_P_IP))
+                tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
+        tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
+
+        context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
+
+        /* MSS L4LEN IDX */
+        mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT);
+        mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT);
+
+        context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
+        context_desc->seqnum_seed = 0;
+
+        buffer_info->time_stamp = jiffies;
+        buffer_info->next_to_watch = i;
+        buffer_info->dma = 0;
+        i++;
+        if (i == tx_ring->count)
+                i = 0;
+
+        tx_ring->next_to_use = i;
+
+        return true;
+}
+
+static inline bool igbvf_tx_csum(struct igbvf_adapter *adapter,
+                                 struct igbvf_ring *tx_ring,
+                                 struct sk_buff *skb, u32 tx_flags)
+{
+        struct e1000_adv_tx_context_desc *context_desc;
+        unsigned int i;
+        struct igbvf_buffer *buffer_info;
+        u32 info = 0, tu_cmd = 0;
+
+        if ((skb->ip_summed == CHECKSUM_PARTIAL) ||
+            (tx_flags & IGBVF_TX_FLAGS_VLAN)) {
+                i = tx_ring->next_to_use;
+                buffer_info = &tx_ring->buffer_info[i];
+                context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
+
+                if (tx_flags & IGBVF_TX_FLAGS_VLAN)
+                        info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK);
+
+                info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
+                if (skb->ip_summed == CHECKSUM_PARTIAL)
+                        info |= (skb_transport_header(skb) -
+                                 skb_network_header(skb));
+
+
+                context_desc->vlan_macip_lens = cpu_to_le32(info);
+
+                tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
+
+                if (skb->ip_summed == CHECKSUM_PARTIAL) {
+                        switch (skb->protocol) {
+                        case __constant_htons(ETH_P_IP):
+                                tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
+                                if (ip_hdr(skb)->protocol == IPPROTO_TCP)
+                                        tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
+                                break;
+                        case __constant_htons(ETH_P_IPV6):
+                                if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
+                                        tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
+                                break;
+                        default:
+                                break;
+                        }
+                }
+
+                context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
+                context_desc->seqnum_seed = 0;
+                context_desc->mss_l4len_idx = 0;
+
+                buffer_info->time_stamp = jiffies;
+                buffer_info->next_to_watch = i;
+                buffer_info->dma = 0;
+                i++;
+                if (i == tx_ring->count)
+                        i = 0;
+                tx_ring->next_to_use = i;
+
+                return true;
+        }
+
+        return false;
+}
+
+static int igbvf_maybe_stop_tx(struct net_device *netdev, int size)
+{
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+
+        /* there is enough descriptors then we don't need to worry  */
+        if (igbvf_desc_unused(adapter->tx_ring) >= size)
+                return 0;
+
+        netif_stop_queue(netdev);
+
+        smp_mb();
+
+        /* We need to check again just in case room has been made available */
+        if (igbvf_desc_unused(adapter->tx_ring) < size)
+                return -EBUSY;
+
+        netif_wake_queue(netdev);
+
+        ++adapter->restart_queue;
+        return 0;
+}
+
+#define IGBVF_MAX_TXD_PWR       16
+#define IGBVF_MAX_DATA_PER_TXD  (1 << IGBVF_MAX_TXD_PWR)
+
+static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter,
+                                   struct igbvf_ring *tx_ring,
+                                   struct sk_buff *skb,
+                                   unsigned int first)
+{
+        struct igbvf_buffer *buffer_info;
+        unsigned int len = skb_headlen(skb);
+        unsigned int count = 0, i;
+        unsigned int f;
+        dma_addr_t *map;
+
+        i = tx_ring->next_to_use;
+
+        if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) {
+                dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
+                return 0;
+        }
+
+        map = skb_shinfo(skb)->dma_maps;
+
+        buffer_info = &tx_ring->buffer_info[i];
+        BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
+        buffer_info->length = len;
+        /* set time_stamp *before* dma to help avoid a possible race */
+        buffer_info->time_stamp = jiffies;
+        buffer_info->next_to_watch = i;
+        buffer_info->dma = map[count];
+        count++;
+
+        for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
+                struct skb_frag_struct *frag;
+
+                i++;
+                if (i == tx_ring->count)
+                        i = 0;
+
+                frag = &skb_shinfo(skb)->frags[f];
+                len = frag->size;
+
+                buffer_info = &tx_ring->buffer_info[i];
+                BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
+                buffer_info->length = len;
+                buffer_info->time_stamp = jiffies;
+                buffer_info->next_to_watch = i;
+                buffer_info->dma = map[count];
+                count++;
+        }
+
+        tx_ring->buffer_info[i].skb = skb;
+        tx_ring->buffer_info[first].next_to_watch = i;
+
+        return count;
+}
+
+static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter,
+                                      struct igbvf_ring *tx_ring,
+                                      int tx_flags, int count, u32 paylen,
+                                      u8 hdr_len)
+{
+        union e1000_adv_tx_desc *tx_desc = NULL;
+        struct igbvf_buffer *buffer_info;
+        u32 olinfo_status = 0, cmd_type_len;
+        unsigned int i;
+
+        cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS |
+                        E1000_ADVTXD_DCMD_DEXT);
+
+        if (tx_flags & IGBVF_TX_FLAGS_VLAN)
+                cmd_type_len |= E1000_ADVTXD_DCMD_VLE;
+
+        if (tx_flags & IGBVF_TX_FLAGS_TSO) {
+                cmd_type_len |= E1000_ADVTXD_DCMD_TSE;
+
+                /* insert tcp checksum */
+                olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
+
+                /* insert ip checksum */
+                if (tx_flags & IGBVF_TX_FLAGS_IPV4)
+                        olinfo_status |= E1000_TXD_POPTS_IXSM << 8;
+
+        } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) {
+                olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
+        }
+
+        olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT);
+
+        i = tx_ring->next_to_use;
+        while (count--) {
+                buffer_info = &tx_ring->buffer_info[i];
+                tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
+                tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
+                tx_desc->read.cmd_type_len =
+                         cpu_to_le32(cmd_type_len | buffer_info->length);
+                tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
+                i++;
+                if (i == tx_ring->count)
+                        i = 0;
+        }
+
+        tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd);
+        /* Force memory writes to complete before letting h/w
+         * know there are new descriptors to fetch.  (Only
+         * applicable for weak-ordered memory model archs,
+         * such as IA-64). */
+        wmb();
+
+        tx_ring->next_to_use = i;
+        writel(i, adapter->hw.hw_addr + tx_ring->tail);
+        /* we need this if more than one processor can write to our tail
+         * at a time, it syncronizes IO on IA64/Altix systems */
+        mmiowb();
+}
+
+static int igbvf_xmit_frame_ring_adv(struct sk_buff *skb,
+                                   struct net_device *netdev,
+                                   struct igbvf_ring *tx_ring)
+{
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+        unsigned int first, tx_flags = 0;
+        u8 hdr_len = 0;
+        int count = 0;
+        int tso = 0;
+
+        if (test_bit(__IGBVF_DOWN, &adapter->state)) {
+                dev_kfree_skb_any(skb);
+                return NETDEV_TX_OK;
+        }
+
+        if (skb->len <= 0) {
+                dev_kfree_skb_any(skb);
+                return NETDEV_TX_OK;
+        }
+
+        /*
+         * need: count + 4 desc gap to keep tail from touching
+         *       + 2 desc gap to keep tail from touching head,
+         *       + 1 desc for skb->data,
+         *       + 1 desc for context descriptor,
+         * head, otherwise try next time
+         */
+        if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) {
+                /* this is a hard error */
+                return NETDEV_TX_BUSY;
+        }
+
+        if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
+                tx_flags |= IGBVF_TX_FLAGS_VLAN;
+                tx_flags |= (vlan_tx_tag_get(skb) << IGBVF_TX_FLAGS_VLAN_SHIFT);
+        }
+
+        if (skb->protocol == htons(ETH_P_IP))
+                tx_flags |= IGBVF_TX_FLAGS_IPV4;
+
+        first = tx_ring->next_to_use;
+
+        tso = skb_is_gso(skb) ?
+                igbvf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len) : 0;
+        if (unlikely(tso < 0)) {
+                dev_kfree_skb_any(skb);
+                return NETDEV_TX_OK;
+        }
+
+        if (tso)
+                tx_flags |= IGBVF_TX_FLAGS_TSO;
+        else if (igbvf_tx_csum(adapter, tx_ring, skb, tx_flags) &&
+                 (skb->ip_summed == CHECKSUM_PARTIAL))
+                tx_flags |= IGBVF_TX_FLAGS_CSUM;
+
+        /*
+         * count reflects descriptors mapped, if 0 then mapping error
+         * has occured and we need to rewind the descriptor queue
+         */
+        count = igbvf_tx_map_adv(adapter, tx_ring, skb, first);
+
+        if (count) {
+                igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count,
+                                   skb->len, hdr_len);
+                netdev->trans_start = jiffies;
+                /* Make sure there is space in the ring for the next send. */
+                igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4);
+        } else {
+                dev_kfree_skb_any(skb);
+                tx_ring->buffer_info[first].time_stamp = 0;
+                tx_ring->next_to_use = first;
+        }
+
+        return NETDEV_TX_OK;
+}
+
+static int igbvf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
+{
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+        struct igbvf_ring *tx_ring;
+        int retval;
+
+        if (test_bit(__IGBVF_DOWN, &adapter->state)) {
+                dev_kfree_skb_any(skb);
+                return NETDEV_TX_OK;
+        }
+
+        tx_ring = &adapter->tx_ring[0];
+
+        retval = igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring);
+
+        return retval;
+}
+
+/**
+ * igbvf_tx_timeout - Respond to a Tx Hang
+ * @netdev: network interface device structure
+ **/
+static void igbvf_tx_timeout(struct net_device *netdev)
+{
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+
+        /* Do the reset outside of interrupt context */
+        adapter->tx_timeout_count++;
+        schedule_work(&adapter->reset_task);
+}
+
+static void igbvf_reset_task(struct work_struct *work)
+{
+        struct igbvf_adapter *adapter;
+        adapter = container_of(work, struct igbvf_adapter, reset_task);
+
+        igbvf_reinit_locked(adapter);
+}
+
+/**
+ * igbvf_get_stats - Get System Network Statistics
+ * @netdev: network interface device structure
+ *
+ * Returns the address of the device statistics structure.
+ * The statistics are actually updated from the timer callback.
+ **/
+static struct net_device_stats *igbvf_get_stats(struct net_device *netdev)
+{
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+
+        /* only return the current stats */
+        return &adapter->net_stats;
+}
+
+/**
+ * igbvf_change_mtu - Change the Maximum Transfer Unit
+ * @netdev: network interface device structure
+ * @new_mtu: new value for maximum frame size
+ *
+ * Returns 0 on success, negative on failure
+ **/
+static int igbvf_change_mtu(struct net_device *netdev, int new_mtu)
+{
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+        int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
+
+        if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) {
+                dev_err(&adapter->pdev->dev, "Invalid MTU setting\n");
+                return -EINVAL;
+        }
+
+        /* Jumbo frame size limits */
+        if (max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) {
+                if (!(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
+                        dev_err(&adapter->pdev->dev,
+                                "Jumbo Frames not supported.\n");
+                        return -EINVAL;
+                }
+        }
+
+#define MAX_STD_JUMBO_FRAME_SIZE 9234
+        if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
+                dev_err(&adapter->pdev->dev, "MTU > 9216 not supported.\n");
+                return -EINVAL;
+        }
+
+        while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
+                msleep(1);
+        /* igbvf_down has a dependency on max_frame_size */
+        adapter->max_frame_size = max_frame;
+        if (netif_running(netdev))
+                igbvf_down(adapter);
+
+        /*
+         * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
+         * means we reserve 2 more, this pushes us to allocate from the next
+         * larger slab size.
+         * i.e. RXBUFFER_2048 --> size-4096 slab
+         * However with the new *_jumbo_rx* routines, jumbo receives will use
+         * fragmented skbs
+         */
+
+        if (max_frame <= 1024)
+                adapter->rx_buffer_len = 1024;
+        else if (max_frame <= 2048)
+                adapter->rx_buffer_len = 2048;
+        else
+#if (PAGE_SIZE / 2) > 16384
+                adapter->rx_buffer_len = 16384;
+#else
+                adapter->rx_buffer_len = PAGE_SIZE / 2;
+#endif
+
+
+        /* adjust allocation if LPE protects us, and we aren't using SBP */
+        if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
+             (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
+                adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN +
+                                         ETH_FCS_LEN;
+
+        dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n",
+                 netdev->mtu, new_mtu);
+        netdev->mtu = new_mtu;
+
+        if (netif_running(netdev))
+                igbvf_up(adapter);
+        else
+                igbvf_reset(adapter);
+
+        clear_bit(__IGBVF_RESETTING, &adapter->state);
+
+        return 0;
+}
+
+static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
+{
+        switch (cmd) {
+        default:
+                return -EOPNOTSUPP;
+        }
+}
+
+static int igbvf_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+        struct net_device *netdev = pci_get_drvdata(pdev);
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+#ifdef CONFIG_PM
+        int retval = 0;
+#endif
+
+        netif_device_detach(netdev);
+
+        if (netif_running(netdev)) {
+                WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
+                igbvf_down(adapter);
+                igbvf_free_irq(adapter);
+        }
+
+#ifdef CONFIG_PM
+        retval = pci_save_state(pdev);
+        if (retval)
+                return retval;
+#endif
+
+        pci_disable_device(pdev);
+
+        return 0;
+}
+
+#ifdef CONFIG_PM
+static int igbvf_resume(struct pci_dev *pdev)
+{
+        struct net_device *netdev = pci_get_drvdata(pdev);
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+        u32 err;
+
+        pci_restore_state(pdev);
+        err = pci_enable_device_mem(pdev);
+        if (err) {
+                dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
+                return err;
+        }
+
+        pci_set_master(pdev);
+
+        if (netif_running(netdev)) {
+                err = igbvf_request_irq(adapter);
+                if (err)
+                        return err;
+        }
+
+        igbvf_reset(adapter);
+
+        if (netif_running(netdev))
+                igbvf_up(adapter);
+
+        netif_device_attach(netdev);
+
+        return 0;
+}
+#endif
+
+static void igbvf_shutdown(struct pci_dev *pdev)
+{
+        igbvf_suspend(pdev, PMSG_SUSPEND);
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+/*
+ * Polling 'interrupt' - used by things like netconsole to send skbs
+ * without having to re-enable interrupts. It's not called while
+ * the interrupt routine is executing.
+ */
+static void igbvf_netpoll(struct net_device *netdev)
+{
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+
+        disable_irq(adapter->pdev->irq);
+
+        igbvf_clean_tx_irq(adapter->tx_ring);
+
+        enable_irq(adapter->pdev->irq);
+}
+#endif
+
+/**
+ * igbvf_io_error_detected - called when PCI error is detected
+ * @pdev: Pointer to PCI device
+ * @state: The current pci connection state
+ *
+ * This function is called after a PCI bus error affecting
+ * this device has been detected.
+ */
+static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev,
+                                                pci_channel_state_t state)
+{
+        struct net_device *netdev = pci_get_drvdata(pdev);
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+
+        netif_device_detach(netdev);
+
+        if (netif_running(netdev))
+                igbvf_down(adapter);
+        pci_disable_device(pdev);
+
+        /* Request a slot slot reset. */
+        return PCI_ERS_RESULT_NEED_RESET;
+}
+
+/**
+ * igbvf_io_slot_reset - called after the pci bus has been reset.
+ * @pdev: Pointer to PCI device
+ *
+ * Restart the card from scratch, as if from a cold-boot. Implementation
+ * resembles the first-half of the igbvf_resume routine.
+ */
+static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev)
+{
+        struct net_device *netdev = pci_get_drvdata(pdev);
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+
+        if (pci_enable_device_mem(pdev)) {
+                dev_err(&pdev->dev,
+                        "Cannot re-enable PCI device after reset.\n");
+                return PCI_ERS_RESULT_DISCONNECT;
+        }
+        pci_set_master(pdev);
+
+        igbvf_reset(adapter);
+
+        return PCI_ERS_RESULT_RECOVERED;
+}
+
+/**
+ * igbvf_io_resume - called when traffic can start flowing again.
+ * @pdev: Pointer to PCI device
+ *
+ * This callback is called when the error recovery driver tells us that
+ * its OK to resume normal operation. Implementation resembles the
+ * second-half of the igbvf_resume routine.
+ */
+static void igbvf_io_resume(struct pci_dev *pdev)
+{
+        struct net_device *netdev = pci_get_drvdata(pdev);
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+
+        if (netif_running(netdev)) {
+                if (igbvf_up(adapter)) {
+                        dev_err(&pdev->dev,
+                                "can't bring device back up after reset\n");
+                        return;
+                }
+        }
+
+        netif_device_attach(netdev);
+}
+
+static void igbvf_print_device_info(struct igbvf_adapter *adapter)
+{
+        struct e1000_hw *hw = &adapter->hw;
+        struct net_device *netdev = adapter->netdev;
+        struct pci_dev *pdev = adapter->pdev;
+
+        dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n");
+        dev_info(&pdev->dev, "Address: %02x:%02x:%02x:%02x:%02x:%02x\n",
+                 /* MAC address */
+                 netdev->dev_addr[0], netdev->dev_addr[1],
+                 netdev->dev_addr[2], netdev->dev_addr[3],
+                 netdev->dev_addr[4], netdev->dev_addr[5]);
+        dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type);
+}
+
+static const struct net_device_ops igbvf_netdev_ops = {
+        .ndo_open                       = igbvf_open,
+        .ndo_stop                       = igbvf_close,
+        .ndo_start_xmit                 = igbvf_xmit_frame,
+        .ndo_get_stats                  = igbvf_get_stats,
+        .ndo_set_multicast_list         = igbvf_set_multi,
+        .ndo_set_mac_address            = igbvf_set_mac,
+        .ndo_change_mtu                 = igbvf_change_mtu,
+        .ndo_do_ioctl                   = igbvf_ioctl,
+        .ndo_tx_timeout                 = igbvf_tx_timeout,
+        .ndo_vlan_rx_register           = igbvf_vlan_rx_register,
+        .ndo_vlan_rx_add_vid            = igbvf_vlan_rx_add_vid,
+        .ndo_vlan_rx_kill_vid           = igbvf_vlan_rx_kill_vid,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+        .ndo_poll_controller            = igbvf_netpoll,
+#endif
+};
+
+/**
+ * igbvf_probe - Device Initialization Routine
+ * @pdev: PCI device information struct
+ * @ent: entry in igbvf_pci_tbl
+ *
+ * Returns 0 on success, negative on failure
+ *
+ * igbvf_probe initializes an adapter identified by a pci_dev structure.
+ * The OS initialization, configuring of the adapter private structure,
+ * and a hardware reset occur.
+ **/
+static int __devinit igbvf_probe(struct pci_dev *pdev,
+                                 const struct pci_device_id *ent)
+{
+        struct net_device *netdev;
+        struct igbvf_adapter *adapter;
+        struct e1000_hw *hw;
+        const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data];
+
+        static int cards_found;
+        int err, pci_using_dac;
+
+        err = pci_enable_device_mem(pdev);
+        if (err)
+                return err;
+
+        pci_using_dac = 0;
+        err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
+        if (!err) {
+                err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
+                if (!err)
+                        pci_using_dac = 1;
+        } else {
+                err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
+                if (err) {
+                        err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
+                        if (err) {
+                                dev_err(&pdev->dev, "No usable DMA "
+                                        "configuration, aborting\n");
+                                goto err_dma;
+                        }
+                }
+        }
+
+        err = pci_request_regions(pdev, igbvf_driver_name);
+        if (err)
+                goto err_pci_reg;
+
+        pci_set_master(pdev);
+
+        err = -ENOMEM;
+        netdev = alloc_etherdev(sizeof(struct igbvf_adapter));
+        if (!netdev)
+                goto err_alloc_etherdev;
+
+        SET_NETDEV_DEV(netdev, &pdev->dev);
+
+        pci_set_drvdata(pdev, netdev);
+        adapter = netdev_priv(netdev);
+        hw = &adapter->hw;
+        adapter->netdev = netdev;
+        adapter->pdev = pdev;
+        adapter->ei = ei;
+        adapter->pba = ei->pba;
+        adapter->flags = ei->flags;
+        adapter->hw.back = adapter;
+        adapter->hw.mac.type = ei->mac;
+        adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1;
+
+        /* PCI config space info */
+
+        hw->vendor_id = pdev->vendor;
+        hw->device_id = pdev->device;
+        hw->subsystem_vendor_id = pdev->subsystem_vendor;
+        hw->subsystem_device_id = pdev->subsystem_device;
+
+        pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
+
+        err = -EIO;
+        adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0),
+                                      pci_resource_len(pdev, 0));
+
+        if (!adapter->hw.hw_addr)
+                goto err_ioremap;
+
+        if (ei->get_variants) {
+                err = ei->get_variants(adapter);
+                if (err)
+                        goto err_ioremap;
+        }
+
+        /* setup adapter struct */
+        err = igbvf_sw_init(adapter);
+        if (err)
+                goto err_sw_init;
+
+        /* construct the net_device struct */
+        netdev->netdev_ops = &igbvf_netdev_ops;
+
+        igbvf_set_ethtool_ops(netdev);
+        netdev->watchdog_timeo = 5 * HZ;
+        strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
+
+        adapter->bd_number = cards_found++;
+
+        netdev->features = NETIF_F_SG |
+                           NETIF_F_IP_CSUM |
+                           NETIF_F_HW_VLAN_TX |
+                           NETIF_F_HW_VLAN_RX |
+                           NETIF_F_HW_VLAN_FILTER;
+
+        netdev->features |= NETIF_F_IPV6_CSUM;
+        netdev->features |= NETIF_F_TSO;
+        netdev->features |= NETIF_F_TSO6;
+
+        if (pci_using_dac)
+                netdev->features |= NETIF_F_HIGHDMA;
+
+        netdev->vlan_features |= NETIF_F_TSO;
+        netdev->vlan_features |= NETIF_F_TSO6;
+        netdev->vlan_features |= NETIF_F_IP_CSUM;
+        netdev->vlan_features |= NETIF_F_IPV6_CSUM;
+        netdev->vlan_features |= NETIF_F_SG;
+
+        /*reset the controller to put the device in a known good state */
+        err = hw->mac.ops.reset_hw(hw);
+        if (err) {
+                dev_info(&pdev->dev,
+                         "PF still in reset state, assigning new address\n");
+                random_ether_addr(hw->mac.addr);
+        } else {
+                err = hw->mac.ops.read_mac_addr(hw);
+                if (err) {
+                        dev_err(&pdev->dev, "Error reading MAC address\n");
+                        goto err_hw_init;
+                }
+        }
+
+        memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
+        memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
+
+        if (!is_valid_ether_addr(netdev->perm_addr)) {
+                dev_err(&pdev->dev, "Invalid MAC Address: "
+                        "%02x:%02x:%02x:%02x:%02x:%02x\n",
+                        netdev->dev_addr[0], netdev->dev_addr[1],
+                        netdev->dev_addr[2], netdev->dev_addr[3],
+                        netdev->dev_addr[4], netdev->dev_addr[5]);
+                err = -EIO;
+                goto err_hw_init;
+        }
+
+        setup_timer(&adapter->watchdog_timer, &igbvf_watchdog,
+                    (unsigned long) adapter);
+
+        INIT_WORK(&adapter->reset_task, igbvf_reset_task);
+        INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task);
+
+        /* ring size defaults */
+        adapter->rx_ring->count = 1024;
+        adapter->tx_ring->count = 1024;
+
+        /* reset the hardware with the new settings */
+        igbvf_reset(adapter);
+
+        /* tell the stack to leave us alone until igbvf_open() is called */
+        netif_carrier_off(netdev);
+        netif_stop_queue(netdev);
+
+        strcpy(netdev->name, "eth%d");
+        err = register_netdev(netdev);
+        if (err)
+                goto err_hw_init;
+
+        igbvf_print_device_info(adapter);
+
+        igbvf_initialize_last_counter_stats(adapter);
+
+        return 0;
+
+err_hw_init:
+        kfree(adapter->tx_ring);
+        kfree(adapter->rx_ring);
+err_sw_init:
+        igbvf_reset_interrupt_capability(adapter);
+        iounmap(adapter->hw.hw_addr);
+err_ioremap:
+        free_netdev(netdev);
+err_alloc_etherdev:
+        pci_release_regions(pdev);
+err_pci_reg:
+err_dma:
+        pci_disable_device(pdev);
+        return err;
+}
+
+/**
+ * igbvf_remove - Device Removal Routine
+ * @pdev: PCI device information struct
+ *
+ * igbvf_remove is called by the PCI subsystem to alert the driver
+ * that it should release a PCI device.  The could be caused by a
+ * Hot-Plug event, or because the driver is going to be removed from
+ * memory.
+ **/
+static void __devexit igbvf_remove(struct pci_dev *pdev)
+{
+        struct net_device *netdev = pci_get_drvdata(pdev);
+        struct igbvf_adapter *adapter = netdev_priv(netdev);
+        struct e1000_hw *hw = &adapter->hw;
+
+        /*
+         * flush_scheduled work may reschedule our watchdog task, so
+         * explicitly disable watchdog tasks from being rescheduled
+         */
+        set_bit(__IGBVF_DOWN, &adapter->state);
+        del_timer_sync(&adapter->watchdog_timer);
+
+        flush_scheduled_work();
+
+        unregister_netdev(netdev);
+
+        igbvf_reset_interrupt_capability(adapter);
+
+        /*
+         * it is important to delete the napi struct prior to freeing the
+         * rx ring so that you do not end up with null pointer refs
+         */
+        netif_napi_del(&adapter->rx_ring->napi);
+        kfree(adapter->tx_ring);
+        kfree(adapter->rx_ring);
+
+        iounmap(hw->hw_addr);
+        if (hw->flash_address)
+                iounmap(hw->flash_address);
+        pci_release_regions(pdev);
+
+        free_netdev(netdev);
+
+        pci_disable_device(pdev);
+}
+
+/* PCI Error Recovery (ERS) */
+static struct pci_error_handlers igbvf_err_handler = {
+        .error_detected = igbvf_io_error_detected,
+        .slot_reset = igbvf_io_slot_reset,
+        .resume = igbvf_io_resume,
+};
+
+static struct pci_device_id igbvf_pci_tbl[] = {
+        { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf },
+        { } /* terminate list */
+};
+MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl);
+
+/* PCI Device API Driver */
+static struct pci_driver igbvf_driver = {
+        .name     = igbvf_driver_name,
+        .id_table = igbvf_pci_tbl,
+        .probe    = igbvf_probe,
+        .remove   = __devexit_p(igbvf_remove),
+#ifdef CONFIG_PM
+        /* Power Management Hooks */
+        .suspend  = igbvf_suspend,
+        .resume   = igbvf_resume,
+#endif
+        .shutdown = igbvf_shutdown,
+        .err_handler = &igbvf_err_handler
+};
+
+/**
+ * igbvf_init_module - Driver Registration Routine
+ *
+ * igbvf_init_module is the first routine called when the driver is
+ * loaded. All it does is register with the PCI subsystem.
+ **/
+static int __init igbvf_init_module(void)
+{
+        int ret;
+        printk(KERN_INFO "%s - version %s\n",
+               igbvf_driver_string, igbvf_driver_version);
+        printk(KERN_INFO "%s\n", igbvf_copyright);
+
+        ret = pci_register_driver(&igbvf_driver);
+        pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY, igbvf_driver_name,
+                               PM_QOS_DEFAULT_VALUE);
+
+        return ret;
+}
+module_init(igbvf_init_module);
+
+/**
+ * igbvf_exit_module - Driver Exit Cleanup Routine
+ *
+ * igbvf_exit_module is called just before the driver is removed
+ * from memory.
+ **/
+static void __exit igbvf_exit_module(void)
+{
+        pci_unregister_driver(&igbvf_driver);
+        pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY, igbvf_driver_name);
+}
+module_exit(igbvf_exit_module);
+
+
+MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
+MODULE_DESCRIPTION("Intel(R) 82576 Virtual Function Network Driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+
+/* netdev.c */