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* Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
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* Copyright 2007 Nuova Systems, Inc. All rights reserved.
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* This program is free software; you may redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/workqueue.h>
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#include <linux/pci.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/if_ether.h>
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#include <linux/if_vlan.h>
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#include <linux/ethtool.h>
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#include <linux/ipv6.h>
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#include <linux/tcp.h>
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#include <linux/rtnetlink.h>
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#include <linux/prefetch.h>
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#include <net/ip6_checksum.h>
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#include "cq_enet_desc.h"
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#include "vnic_intr.h"
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#include "vnic_stats.h"
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#define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ)
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#define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS)
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#define MAX_TSO (1 << 16)
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#define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
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#define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */
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#define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */
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/* Supported devices */
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static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
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{ PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
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{ PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
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{ 0, } /* end of table */
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MODULE_DESCRIPTION(DRV_DESCRIPTION);
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MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DRV_VERSION);
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MODULE_DEVICE_TABLE(pci, enic_id_table);
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char name[ETH_GSTRING_LEN];
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#define ENIC_TX_STAT(stat) \
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{ .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
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#define ENIC_RX_STAT(stat) \
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{ .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
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static const struct enic_stat enic_tx_stats[] = {
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ENIC_TX_STAT(tx_frames_ok),
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ENIC_TX_STAT(tx_unicast_frames_ok),
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ENIC_TX_STAT(tx_multicast_frames_ok),
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ENIC_TX_STAT(tx_broadcast_frames_ok),
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ENIC_TX_STAT(tx_bytes_ok),
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ENIC_TX_STAT(tx_unicast_bytes_ok),
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ENIC_TX_STAT(tx_multicast_bytes_ok),
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ENIC_TX_STAT(tx_broadcast_bytes_ok),
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ENIC_TX_STAT(tx_drops),
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ENIC_TX_STAT(tx_errors),
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static const struct enic_stat enic_rx_stats[] = {
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ENIC_RX_STAT(rx_frames_ok),
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ENIC_RX_STAT(rx_frames_total),
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ENIC_RX_STAT(rx_unicast_frames_ok),
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ENIC_RX_STAT(rx_multicast_frames_ok),
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ENIC_RX_STAT(rx_broadcast_frames_ok),
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ENIC_RX_STAT(rx_bytes_ok),
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ENIC_RX_STAT(rx_unicast_bytes_ok),
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ENIC_RX_STAT(rx_multicast_bytes_ok),
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ENIC_RX_STAT(rx_broadcast_bytes_ok),
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ENIC_RX_STAT(rx_drop),
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ENIC_RX_STAT(rx_no_bufs),
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ENIC_RX_STAT(rx_errors),
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ENIC_RX_STAT(rx_rss),
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ENIC_RX_STAT(rx_crc_errors),
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ENIC_RX_STAT(rx_frames_64),
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ENIC_RX_STAT(rx_frames_127),
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ENIC_RX_STAT(rx_frames_255),
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ENIC_RX_STAT(rx_frames_511),
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ENIC_RX_STAT(rx_frames_1023),
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ENIC_RX_STAT(rx_frames_1518),
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ENIC_RX_STAT(rx_frames_to_max),
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static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
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static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
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int enic_is_dynamic(struct enic *enic)
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return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
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int enic_sriov_enabled(struct enic *enic)
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return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0;
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int enic_is_valid_vf(struct enic *enic, int vf)
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#ifdef CONFIG_PCI_IOV
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return vf >= 0 && vf < enic->num_vfs;
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static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
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static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
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return enic->rq_count + wq;
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static inline unsigned int enic_legacy_io_intr(void)
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static inline unsigned int enic_legacy_err_intr(void)
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static inline unsigned int enic_legacy_notify_intr(void)
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static inline unsigned int enic_msix_rq_intr(struct enic *enic, unsigned int rq)
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return enic->cq[enic_cq_rq(enic, rq)].interrupt_offset;
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static inline unsigned int enic_msix_wq_intr(struct enic *enic, unsigned int wq)
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return enic->cq[enic_cq_wq(enic, wq)].interrupt_offset;
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static inline unsigned int enic_msix_err_intr(struct enic *enic)
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return enic->rq_count + enic->wq_count;
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static inline unsigned int enic_msix_notify_intr(struct enic *enic)
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return enic->rq_count + enic->wq_count + 1;
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static int enic_get_settings(struct net_device *netdev,
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struct ethtool_cmd *ecmd)
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struct enic *enic = netdev_priv(netdev);
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ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
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ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
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ecmd->port = PORT_FIBRE;
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ecmd->transceiver = XCVR_EXTERNAL;
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if (netif_carrier_ok(netdev)) {
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ethtool_cmd_speed_set(ecmd, vnic_dev_port_speed(enic->vdev));
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ecmd->duplex = DUPLEX_FULL;
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ethtool_cmd_speed_set(ecmd, -1);
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ecmd->autoneg = AUTONEG_DISABLE;
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static void enic_get_drvinfo(struct net_device *netdev,
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struct ethtool_drvinfo *drvinfo)
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struct enic *enic = netdev_priv(netdev);
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struct vnic_devcmd_fw_info *fw_info;
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enic_dev_fw_info(enic, &fw_info);
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strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
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strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
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strncpy(drvinfo->fw_version, fw_info->fw_version,
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sizeof(drvinfo->fw_version));
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strncpy(drvinfo->bus_info, pci_name(enic->pdev),
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sizeof(drvinfo->bus_info));
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static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
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for (i = 0; i < enic_n_tx_stats; i++) {
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memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
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data += ETH_GSTRING_LEN;
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for (i = 0; i < enic_n_rx_stats; i++) {
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memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
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data += ETH_GSTRING_LEN;
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static int enic_get_sset_count(struct net_device *netdev, int sset)
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return enic_n_tx_stats + enic_n_rx_stats;
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static void enic_get_ethtool_stats(struct net_device *netdev,
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struct ethtool_stats *stats, u64 *data)
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struct enic *enic = netdev_priv(netdev);
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struct vnic_stats *vstats;
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enic_dev_stats_dump(enic, &vstats);
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for (i = 0; i < enic_n_tx_stats; i++)
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*(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
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for (i = 0; i < enic_n_rx_stats; i++)
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*(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
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static u32 enic_get_msglevel(struct net_device *netdev)
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struct enic *enic = netdev_priv(netdev);
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return enic->msg_enable;
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static void enic_set_msglevel(struct net_device *netdev, u32 value)
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struct enic *enic = netdev_priv(netdev);
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enic->msg_enable = value;
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static int enic_get_coalesce(struct net_device *netdev,
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struct ethtool_coalesce *ecmd)
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struct enic *enic = netdev_priv(netdev);
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ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
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ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
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static int enic_set_coalesce(struct net_device *netdev,
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struct ethtool_coalesce *ecmd)
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struct enic *enic = netdev_priv(netdev);
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u32 tx_coalesce_usecs;
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u32 rx_coalesce_usecs;
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unsigned int i, intr;
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tx_coalesce_usecs = min_t(u32, ecmd->tx_coalesce_usecs,
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vnic_dev_get_intr_coal_timer_max(enic->vdev));
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rx_coalesce_usecs = min_t(u32, ecmd->rx_coalesce_usecs,
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vnic_dev_get_intr_coal_timer_max(enic->vdev));
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switch (vnic_dev_get_intr_mode(enic->vdev)) {
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case VNIC_DEV_INTR_MODE_INTX:
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if (tx_coalesce_usecs != rx_coalesce_usecs)
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intr = enic_legacy_io_intr();
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vnic_intr_coalescing_timer_set(&enic->intr[intr],
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case VNIC_DEV_INTR_MODE_MSI:
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if (tx_coalesce_usecs != rx_coalesce_usecs)
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vnic_intr_coalescing_timer_set(&enic->intr[0],
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case VNIC_DEV_INTR_MODE_MSIX:
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for (i = 0; i < enic->wq_count; i++) {
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intr = enic_msix_wq_intr(enic, i);
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vnic_intr_coalescing_timer_set(&enic->intr[intr],
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for (i = 0; i < enic->rq_count; i++) {
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intr = enic_msix_rq_intr(enic, i);
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vnic_intr_coalescing_timer_set(&enic->intr[intr],
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enic->tx_coalesce_usecs = tx_coalesce_usecs;
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enic->rx_coalesce_usecs = rx_coalesce_usecs;
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static const struct ethtool_ops enic_ethtool_ops = {
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.get_settings = enic_get_settings,
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.get_drvinfo = enic_get_drvinfo,
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.get_msglevel = enic_get_msglevel,
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.set_msglevel = enic_set_msglevel,
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.get_link = ethtool_op_get_link,
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.get_strings = enic_get_strings,
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.get_sset_count = enic_get_sset_count,
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.get_ethtool_stats = enic_get_ethtool_stats,
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.get_coalesce = enic_get_coalesce,
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.set_coalesce = enic_set_coalesce,
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static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
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struct enic *enic = vnic_dev_priv(wq->vdev);
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pci_unmap_single(enic->pdev, buf->dma_addr,
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buf->len, PCI_DMA_TODEVICE);
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pci_unmap_page(enic->pdev, buf->dma_addr,
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buf->len, PCI_DMA_TODEVICE);
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dev_kfree_skb_any(buf->os_buf);
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static void enic_wq_free_buf(struct vnic_wq *wq,
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struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
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enic_free_wq_buf(wq, buf);
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static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
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u8 type, u16 q_number, u16 completed_index, void *opaque)
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struct enic *enic = vnic_dev_priv(vdev);
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spin_lock(&enic->wq_lock[q_number]);
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vnic_wq_service(&enic->wq[q_number], cq_desc,
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completed_index, enic_wq_free_buf,
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if (netif_queue_stopped(enic->netdev) &&
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vnic_wq_desc_avail(&enic->wq[q_number]) >=
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(MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
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netif_wake_queue(enic->netdev);
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spin_unlock(&enic->wq_lock[q_number]);
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static void enic_log_q_error(struct enic *enic)
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for (i = 0; i < enic->wq_count; i++) {
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error_status = vnic_wq_error_status(&enic->wq[i]);
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netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
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for (i = 0; i < enic->rq_count; i++) {
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error_status = vnic_rq_error_status(&enic->rq[i]);
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netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
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static void enic_msglvl_check(struct enic *enic)
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u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
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if (msg_enable != enic->msg_enable) {
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netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
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enic->msg_enable, msg_enable);
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enic->msg_enable = msg_enable;
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static void enic_mtu_check(struct enic *enic)
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u32 mtu = vnic_dev_mtu(enic->vdev);
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struct net_device *netdev = enic->netdev;
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if (mtu && mtu != enic->port_mtu) {
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enic->port_mtu = mtu;
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if (enic_is_dynamic(enic)) {
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mtu = max_t(int, ENIC_MIN_MTU,
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min_t(int, ENIC_MAX_MTU, mtu));
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if (mtu != netdev->mtu)
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schedule_work(&enic->change_mtu_work);
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if (mtu < netdev->mtu)
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"interface MTU (%d) set higher "
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"than switch port MTU (%d)\n",
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static void enic_link_check(struct enic *enic)
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int link_status = vnic_dev_link_status(enic->vdev);
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int carrier_ok = netif_carrier_ok(enic->netdev);
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if (link_status && !carrier_ok) {
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netdev_info(enic->netdev, "Link UP\n");
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netif_carrier_on(enic->netdev);
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} else if (!link_status && carrier_ok) {
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netdev_info(enic->netdev, "Link DOWN\n");
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netif_carrier_off(enic->netdev);
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static void enic_notify_check(struct enic *enic)
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enic_msglvl_check(enic);
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enic_mtu_check(enic);
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enic_link_check(enic);
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#define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
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static irqreturn_t enic_isr_legacy(int irq, void *data)
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struct net_device *netdev = data;
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struct enic *enic = netdev_priv(netdev);
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unsigned int io_intr = enic_legacy_io_intr();
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unsigned int err_intr = enic_legacy_err_intr();
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unsigned int notify_intr = enic_legacy_notify_intr();
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vnic_intr_mask(&enic->intr[io_intr]);
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pba = vnic_intr_legacy_pba(enic->legacy_pba);
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vnic_intr_unmask(&enic->intr[io_intr]);
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return IRQ_NONE; /* not our interrupt */
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if (ENIC_TEST_INTR(pba, notify_intr)) {
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vnic_intr_return_all_credits(&enic->intr[notify_intr]);
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enic_notify_check(enic);
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if (ENIC_TEST_INTR(pba, err_intr)) {
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vnic_intr_return_all_credits(&enic->intr[err_intr]);
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enic_log_q_error(enic);
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/* schedule recovery from WQ/RQ error */
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schedule_work(&enic->reset);
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if (ENIC_TEST_INTR(pba, io_intr)) {
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if (napi_schedule_prep(&enic->napi[0]))
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__napi_schedule(&enic->napi[0]);
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vnic_intr_unmask(&enic->intr[io_intr]);
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static irqreturn_t enic_isr_msi(int irq, void *data)
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struct enic *enic = data;
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/* With MSI, there is no sharing of interrupts, so this is
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* our interrupt and there is no need to ack it. The device
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* is not providing per-vector masking, so the OS will not
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* write to PCI config space to mask/unmask the interrupt.
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* We're using mask_on_assertion for MSI, so the device
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* automatically masks the interrupt when the interrupt is
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* generated. Later, when exiting polling, the interrupt
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* will be unmasked (see enic_poll).
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* Also, the device uses the same PCIe Traffic Class (TC)
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* for Memory Write data and MSI, so there are no ordering
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* issues; the MSI will always arrive at the Root Complex
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* _after_ corresponding Memory Writes (i.e. descriptor
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napi_schedule(&enic->napi[0]);
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static irqreturn_t enic_isr_msix_rq(int irq, void *data)
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struct napi_struct *napi = data;
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/* schedule NAPI polling for RQ cleanup */
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static irqreturn_t enic_isr_msix_wq(int irq, void *data)
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struct enic *enic = data;
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unsigned int cq = enic_cq_wq(enic, 0);
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unsigned int intr = enic_msix_wq_intr(enic, 0);
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unsigned int wq_work_to_do = -1; /* no limit */
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unsigned int wq_work_done;
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wq_work_done = vnic_cq_service(&enic->cq[cq],
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wq_work_to_do, enic_wq_service, NULL);
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vnic_intr_return_credits(&enic->intr[intr],
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1 /* reset intr timer */);
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static irqreturn_t enic_isr_msix_err(int irq, void *data)
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struct enic *enic = data;
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unsigned int intr = enic_msix_err_intr(enic);
577
vnic_intr_return_all_credits(&enic->intr[intr]);
579
enic_log_q_error(enic);
581
/* schedule recovery from WQ/RQ error */
582
schedule_work(&enic->reset);
587
static irqreturn_t enic_isr_msix_notify(int irq, void *data)
589
struct enic *enic = data;
590
unsigned int intr = enic_msix_notify_intr(enic);
592
vnic_intr_return_all_credits(&enic->intr[intr]);
593
enic_notify_check(enic);
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static inline void enic_queue_wq_skb_cont(struct enic *enic,
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struct vnic_wq *wq, struct sk_buff *skb,
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unsigned int len_left, int loopback)
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const skb_frag_t *frag;
604
/* Queue additional data fragments */
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for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
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len_left -= skb_frag_size(frag);
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enic_queue_wq_desc_cont(wq, skb,
608
skb_frag_dma_map(&enic->pdev->dev,
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frag, 0, skb_frag_size(frag),
612
(len_left == 0), /* EOP? */
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static inline void enic_queue_wq_skb_vlan(struct enic *enic,
618
struct vnic_wq *wq, struct sk_buff *skb,
619
int vlan_tag_insert, unsigned int vlan_tag, int loopback)
621
unsigned int head_len = skb_headlen(skb);
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unsigned int len_left = skb->len - head_len;
623
int eop = (len_left == 0);
625
/* Queue the main skb fragment. The fragments are no larger
626
* than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
627
* than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
628
* per fragment is queued.
630
enic_queue_wq_desc(wq, skb,
631
pci_map_single(enic->pdev, skb->data,
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head_len, PCI_DMA_TODEVICE),
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vlan_tag_insert, vlan_tag,
638
enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
641
static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
642
struct vnic_wq *wq, struct sk_buff *skb,
643
int vlan_tag_insert, unsigned int vlan_tag, int loopback)
645
unsigned int head_len = skb_headlen(skb);
646
unsigned int len_left = skb->len - head_len;
647
unsigned int hdr_len = skb_checksum_start_offset(skb);
648
unsigned int csum_offset = hdr_len + skb->csum_offset;
649
int eop = (len_left == 0);
651
/* Queue the main skb fragment. The fragments are no larger
652
* than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
653
* than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
654
* per fragment is queued.
656
enic_queue_wq_desc_csum_l4(wq, skb,
657
pci_map_single(enic->pdev, skb->data,
658
head_len, PCI_DMA_TODEVICE),
662
vlan_tag_insert, vlan_tag,
666
enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
669
static inline void enic_queue_wq_skb_tso(struct enic *enic,
670
struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
671
int vlan_tag_insert, unsigned int vlan_tag, int loopback)
673
unsigned int frag_len_left = skb_headlen(skb);
674
unsigned int len_left = skb->len - frag_len_left;
675
unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
676
int eop = (len_left == 0);
679
unsigned int offset = 0;
682
/* Preload TCP csum field with IP pseudo hdr calculated
683
* with IP length set to zero. HW will later add in length
684
* to each TCP segment resulting from the TSO.
687
if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
688
ip_hdr(skb)->check = 0;
689
tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
690
ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
691
} else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
692
tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
693
&ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
696
/* Queue WQ_ENET_MAX_DESC_LEN length descriptors
697
* for the main skb fragment
699
while (frag_len_left) {
700
len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
701
dma_addr = pci_map_single(enic->pdev, skb->data + offset,
702
len, PCI_DMA_TODEVICE);
703
enic_queue_wq_desc_tso(wq, skb,
707
vlan_tag_insert, vlan_tag,
708
eop && (len == frag_len_left), loopback);
709
frag_len_left -= len;
716
/* Queue WQ_ENET_MAX_DESC_LEN length descriptors
717
* for additional data fragments
719
for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
720
len_left -= skb_frag_size(frag);
721
frag_len_left = skb_frag_size(frag);
724
while (frag_len_left) {
725
len = min(frag_len_left,
726
(unsigned int)WQ_ENET_MAX_DESC_LEN);
727
dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag,
730
enic_queue_wq_desc_cont(wq, skb,
734
(len == frag_len_left), /* EOP? */
736
frag_len_left -= len;
742
static inline void enic_queue_wq_skb(struct enic *enic,
743
struct vnic_wq *wq, struct sk_buff *skb)
745
unsigned int mss = skb_shinfo(skb)->gso_size;
746
unsigned int vlan_tag = 0;
747
int vlan_tag_insert = 0;
750
if (vlan_tx_tag_present(skb)) {
751
/* VLAN tag from trunking driver */
753
vlan_tag = vlan_tx_tag_get(skb);
754
} else if (enic->loop_enable) {
755
vlan_tag = enic->loop_tag;
760
enic_queue_wq_skb_tso(enic, wq, skb, mss,
761
vlan_tag_insert, vlan_tag, loopback);
762
else if (skb->ip_summed == CHECKSUM_PARTIAL)
763
enic_queue_wq_skb_csum_l4(enic, wq, skb,
764
vlan_tag_insert, vlan_tag, loopback);
766
enic_queue_wq_skb_vlan(enic, wq, skb,
767
vlan_tag_insert, vlan_tag, loopback);
770
/* netif_tx_lock held, process context with BHs disabled, or BH */
771
static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
772
struct net_device *netdev)
774
struct enic *enic = netdev_priv(netdev);
775
struct vnic_wq *wq = &enic->wq[0];
783
/* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
784
* which is very likely. In the off chance it's going to take
785
* more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
788
if (skb_shinfo(skb)->gso_size == 0 &&
789
skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
790
skb_linearize(skb)) {
795
spin_lock_irqsave(&enic->wq_lock[0], flags);
797
if (vnic_wq_desc_avail(wq) <
798
skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
799
netif_stop_queue(netdev);
800
/* This is a hard error, log it */
801
netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
802
spin_unlock_irqrestore(&enic->wq_lock[0], flags);
803
return NETDEV_TX_BUSY;
806
enic_queue_wq_skb(enic, wq, skb);
808
if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
809
netif_stop_queue(netdev);
811
spin_unlock_irqrestore(&enic->wq_lock[0], flags);
816
/* dev_base_lock rwlock held, nominally process context */
817
static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev,
818
struct rtnl_link_stats64 *net_stats)
820
struct enic *enic = netdev_priv(netdev);
821
struct vnic_stats *stats;
823
enic_dev_stats_dump(enic, &stats);
825
net_stats->tx_packets = stats->tx.tx_frames_ok;
826
net_stats->tx_bytes = stats->tx.tx_bytes_ok;
827
net_stats->tx_errors = stats->tx.tx_errors;
828
net_stats->tx_dropped = stats->tx.tx_drops;
830
net_stats->rx_packets = stats->rx.rx_frames_ok;
831
net_stats->rx_bytes = stats->rx.rx_bytes_ok;
832
net_stats->rx_errors = stats->rx.rx_errors;
833
net_stats->multicast = stats->rx.rx_multicast_frames_ok;
834
net_stats->rx_over_errors = enic->rq_truncated_pkts;
835
net_stats->rx_crc_errors = enic->rq_bad_fcs;
836
net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
841
void enic_reset_addr_lists(struct enic *enic)
848
static int enic_set_mac_addr(struct net_device *netdev, char *addr)
850
struct enic *enic = netdev_priv(netdev);
852
if (enic_is_dynamic(enic)) {
853
if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
854
return -EADDRNOTAVAIL;
856
if (!is_valid_ether_addr(addr))
857
return -EADDRNOTAVAIL;
860
memcpy(netdev->dev_addr, addr, netdev->addr_len);
865
static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
867
struct enic *enic = netdev_priv(netdev);
868
struct sockaddr *saddr = p;
869
char *addr = saddr->sa_data;
872
if (netif_running(enic->netdev)) {
873
err = enic_dev_del_station_addr(enic);
878
err = enic_set_mac_addr(netdev, addr);
882
if (netif_running(enic->netdev)) {
883
err = enic_dev_add_station_addr(enic);
891
static int enic_set_mac_address(struct net_device *netdev, void *p)
893
struct sockaddr *saddr = p;
894
char *addr = saddr->sa_data;
895
struct enic *enic = netdev_priv(netdev);
898
err = enic_dev_del_station_addr(enic);
902
err = enic_set_mac_addr(netdev, addr);
906
return enic_dev_add_station_addr(enic);
909
static void enic_update_multicast_addr_list(struct enic *enic)
911
struct net_device *netdev = enic->netdev;
912
struct netdev_hw_addr *ha;
913
unsigned int mc_count = netdev_mc_count(netdev);
914
u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
917
if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) {
918
netdev_warn(netdev, "Registering only %d out of %d "
919
"multicast addresses\n",
920
ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
921
mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
924
/* Is there an easier way? Trying to minimize to
925
* calls to add/del multicast addrs. We keep the
926
* addrs from the last call in enic->mc_addr and
927
* look for changes to add/del.
931
netdev_for_each_mc_addr(ha, netdev) {
934
memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
937
for (i = 0; i < enic->mc_count; i++) {
938
for (j = 0; j < mc_count; j++)
939
if (compare_ether_addr(enic->mc_addr[i],
943
enic_dev_del_addr(enic, enic->mc_addr[i]);
946
for (i = 0; i < mc_count; i++) {
947
for (j = 0; j < enic->mc_count; j++)
948
if (compare_ether_addr(mc_addr[i],
949
enic->mc_addr[j]) == 0)
951
if (j == enic->mc_count)
952
enic_dev_add_addr(enic, mc_addr[i]);
955
/* Save the list to compare against next time
958
for (i = 0; i < mc_count; i++)
959
memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
961
enic->mc_count = mc_count;
964
static void enic_update_unicast_addr_list(struct enic *enic)
966
struct net_device *netdev = enic->netdev;
967
struct netdev_hw_addr *ha;
968
unsigned int uc_count = netdev_uc_count(netdev);
969
u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
972
if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) {
973
netdev_warn(netdev, "Registering only %d out of %d "
974
"unicast addresses\n",
975
ENIC_UNICAST_PERFECT_FILTERS, uc_count);
976
uc_count = ENIC_UNICAST_PERFECT_FILTERS;
979
/* Is there an easier way? Trying to minimize to
980
* calls to add/del unicast addrs. We keep the
981
* addrs from the last call in enic->uc_addr and
982
* look for changes to add/del.
986
netdev_for_each_uc_addr(ha, netdev) {
989
memcpy(uc_addr[i++], ha->addr, ETH_ALEN);
992
for (i = 0; i < enic->uc_count; i++) {
993
for (j = 0; j < uc_count; j++)
994
if (compare_ether_addr(enic->uc_addr[i],
998
enic_dev_del_addr(enic, enic->uc_addr[i]);
1001
for (i = 0; i < uc_count; i++) {
1002
for (j = 0; j < enic->uc_count; j++)
1003
if (compare_ether_addr(uc_addr[i],
1004
enic->uc_addr[j]) == 0)
1006
if (j == enic->uc_count)
1007
enic_dev_add_addr(enic, uc_addr[i]);
1010
/* Save the list to compare against next time
1013
for (i = 0; i < uc_count; i++)
1014
memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN);
1016
enic->uc_count = uc_count;
1019
/* netif_tx_lock held, BHs disabled */
1020
static void enic_set_rx_mode(struct net_device *netdev)
1022
struct enic *enic = netdev_priv(netdev);
1024
int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
1025
int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
1026
int promisc = (netdev->flags & IFF_PROMISC) ||
1027
netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
1028
int allmulti = (netdev->flags & IFF_ALLMULTI) ||
1029
netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
1030
unsigned int flags = netdev->flags |
1031
(allmulti ? IFF_ALLMULTI : 0) |
1032
(promisc ? IFF_PROMISC : 0);
1034
if (enic->flags != flags) {
1035
enic->flags = flags;
1036
enic_dev_packet_filter(enic, directed,
1037
multicast, broadcast, promisc, allmulti);
1041
enic_update_unicast_addr_list(enic);
1043
enic_update_multicast_addr_list(enic);
1047
/* netif_tx_lock held, BHs disabled */
1048
static void enic_tx_timeout(struct net_device *netdev)
1050
struct enic *enic = netdev_priv(netdev);
1051
schedule_work(&enic->reset);
1054
static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
1056
struct enic *enic = netdev_priv(netdev);
1057
struct enic_port_profile *pp;
1060
ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1064
if (is_valid_ether_addr(mac)) {
1065
memcpy(pp->vf_mac, mac, ETH_ALEN);
1071
static int enic_set_vf_port(struct net_device *netdev, int vf,
1072
struct nlattr *port[])
1074
struct enic *enic = netdev_priv(netdev);
1075
struct enic_port_profile prev_pp;
1076
struct enic_port_profile *pp;
1077
int err = 0, restore_pp = 1;
1079
ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1083
if (!port[IFLA_PORT_REQUEST])
1086
memcpy(&prev_pp, pp, sizeof(*enic->pp));
1087
memset(pp, 0, sizeof(*enic->pp));
1089
pp->set |= ENIC_SET_REQUEST;
1090
pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1092
if (port[IFLA_PORT_PROFILE]) {
1093
pp->set |= ENIC_SET_NAME;
1094
memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]),
1098
if (port[IFLA_PORT_INSTANCE_UUID]) {
1099
pp->set |= ENIC_SET_INSTANCE;
1100
memcpy(pp->instance_uuid,
1101
nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1104
if (port[IFLA_PORT_HOST_UUID]) {
1105
pp->set |= ENIC_SET_HOST;
1106
memcpy(pp->host_uuid,
1107
nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1110
/* Special case handling: mac came from IFLA_VF_MAC */
1111
if (!is_zero_ether_addr(prev_pp.vf_mac))
1112
memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);
1114
if (vf == PORT_SELF_VF && is_zero_ether_addr(netdev->dev_addr))
1115
random_ether_addr(netdev->dev_addr);
1117
err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
1120
/* Things are still the way they were: Implicit
1121
* DISASSOCIATE failed
1123
memcpy(pp, &prev_pp, sizeof(*pp));
1125
memset(pp, 0, sizeof(*pp));
1126
if (vf == PORT_SELF_VF)
1127
memset(netdev->dev_addr, 0, ETH_ALEN);
1130
/* Set flag to indicate that the port assoc/disassoc
1131
* request has been sent out to fw
1133
pp->set |= ENIC_PORT_REQUEST_APPLIED;
1135
/* If DISASSOCIATE, clean up all assigned/saved macaddresses */
1136
if (pp->request == PORT_REQUEST_DISASSOCIATE) {
1137
memset(pp->mac_addr, 0, ETH_ALEN);
1138
if (vf == PORT_SELF_VF)
1139
memset(netdev->dev_addr, 0, ETH_ALEN);
1143
memset(pp->vf_mac, 0, ETH_ALEN);
1148
static int enic_get_vf_port(struct net_device *netdev, int vf,
1149
struct sk_buff *skb)
1151
struct enic *enic = netdev_priv(netdev);
1152
u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1153
struct enic_port_profile *pp;
1156
ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1160
if (!(pp->set & ENIC_PORT_REQUEST_APPLIED))
1163
err = enic_process_get_pp_request(enic, vf, pp->request, &response);
1167
NLA_PUT_U16(skb, IFLA_PORT_REQUEST, pp->request);
1168
NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response);
1169
if (pp->set & ENIC_SET_NAME)
1170
NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX,
1172
if (pp->set & ENIC_SET_INSTANCE)
1173
NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1175
if (pp->set & ENIC_SET_HOST)
1176
NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX,
1185
static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1187
struct enic *enic = vnic_dev_priv(rq->vdev);
1192
pci_unmap_single(enic->pdev, buf->dma_addr,
1193
buf->len, PCI_DMA_FROMDEVICE);
1194
dev_kfree_skb_any(buf->os_buf);
1197
static int enic_rq_alloc_buf(struct vnic_rq *rq)
1199
struct enic *enic = vnic_dev_priv(rq->vdev);
1200
struct net_device *netdev = enic->netdev;
1201
struct sk_buff *skb;
1202
unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1203
unsigned int os_buf_index = 0;
1204
dma_addr_t dma_addr;
1206
skb = netdev_alloc_skb_ip_align(netdev, len);
1210
dma_addr = pci_map_single(enic->pdev, skb->data,
1211
len, PCI_DMA_FROMDEVICE);
1213
enic_queue_rq_desc(rq, skb, os_buf_index,
1219
static void enic_rq_indicate_buf(struct vnic_rq *rq,
1220
struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1221
int skipped, void *opaque)
1223
struct enic *enic = vnic_dev_priv(rq->vdev);
1224
struct net_device *netdev = enic->netdev;
1225
struct sk_buff *skb;
1227
u8 type, color, eop, sop, ingress_port, vlan_stripped;
1228
u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1229
u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1230
u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1232
u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1239
prefetch(skb->data - NET_IP_ALIGN);
1240
pci_unmap_single(enic->pdev, buf->dma_addr,
1241
buf->len, PCI_DMA_FROMDEVICE);
1243
cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1244
&type, &color, &q_number, &completed_index,
1245
&ingress_port, &fcoe, &eop, &sop, &rss_type,
1246
&csum_not_calc, &rss_hash, &bytes_written,
1247
&packet_error, &vlan_stripped, &vlan_tci, &checksum,
1248
&fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1249
&fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1250
&ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1256
if (bytes_written > 0)
1258
else if (bytes_written == 0)
1259
enic->rq_truncated_pkts++;
1262
dev_kfree_skb_any(skb);
1267
if (eop && bytes_written > 0) {
1272
skb_put(skb, bytes_written);
1273
skb->protocol = eth_type_trans(skb, netdev);
1275
if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc) {
1276
skb->csum = htons(checksum);
1277
skb->ip_summed = CHECKSUM_COMPLETE;
1283
__vlan_hwaccel_put_tag(skb, vlan_tci);
1285
if (netdev->features & NETIF_F_GRO)
1286
napi_gro_receive(&enic->napi[q_number], skb);
1288
netif_receive_skb(skb);
1294
dev_kfree_skb_any(skb);
1298
static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1299
u8 type, u16 q_number, u16 completed_index, void *opaque)
1301
struct enic *enic = vnic_dev_priv(vdev);
1303
vnic_rq_service(&enic->rq[q_number], cq_desc,
1304
completed_index, VNIC_RQ_RETURN_DESC,
1305
enic_rq_indicate_buf, opaque);
1310
static int enic_poll(struct napi_struct *napi, int budget)
1312
struct net_device *netdev = napi->dev;
1313
struct enic *enic = netdev_priv(netdev);
1314
unsigned int cq_rq = enic_cq_rq(enic, 0);
1315
unsigned int cq_wq = enic_cq_wq(enic, 0);
1316
unsigned int intr = enic_legacy_io_intr();
1317
unsigned int rq_work_to_do = budget;
1318
unsigned int wq_work_to_do = -1; /* no limit */
1319
unsigned int work_done, rq_work_done, wq_work_done;
1322
/* Service RQ (first) and WQ
1325
rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1326
rq_work_to_do, enic_rq_service, NULL);
1328
wq_work_done = vnic_cq_service(&enic->cq[cq_wq],
1329
wq_work_to_do, enic_wq_service, NULL);
1331
/* Accumulate intr event credits for this polling
1332
* cycle. An intr event is the completion of a
1333
* a WQ or RQ packet.
1336
work_done = rq_work_done + wq_work_done;
1339
vnic_intr_return_credits(&enic->intr[intr],
1341
0 /* don't unmask intr */,
1342
0 /* don't reset intr timer */);
1344
err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1346
/* Buffer allocation failed. Stay in polling
1347
* mode so we can try to fill the ring again.
1351
rq_work_done = rq_work_to_do;
1353
if (rq_work_done < rq_work_to_do) {
1355
/* Some work done, but not enough to stay in polling,
1359
napi_complete(napi);
1360
vnic_intr_unmask(&enic->intr[intr]);
1363
return rq_work_done;
1366
static int enic_poll_msix(struct napi_struct *napi, int budget)
1368
struct net_device *netdev = napi->dev;
1369
struct enic *enic = netdev_priv(netdev);
1370
unsigned int rq = (napi - &enic->napi[0]);
1371
unsigned int cq = enic_cq_rq(enic, rq);
1372
unsigned int intr = enic_msix_rq_intr(enic, rq);
1373
unsigned int work_to_do = budget;
1374
unsigned int work_done;
1380
work_done = vnic_cq_service(&enic->cq[cq],
1381
work_to_do, enic_rq_service, NULL);
1383
/* Return intr event credits for this polling
1384
* cycle. An intr event is the completion of a
1389
vnic_intr_return_credits(&enic->intr[intr],
1391
0 /* don't unmask intr */,
1392
0 /* don't reset intr timer */);
1394
err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1396
/* Buffer allocation failed. Stay in polling mode
1397
* so we can try to fill the ring again.
1401
work_done = work_to_do;
1403
if (work_done < work_to_do) {
1405
/* Some work done, but not enough to stay in polling,
1409
napi_complete(napi);
1410
vnic_intr_unmask(&enic->intr[intr]);
1416
static void enic_notify_timer(unsigned long data)
1418
struct enic *enic = (struct enic *)data;
1420
enic_notify_check(enic);
1422
mod_timer(&enic->notify_timer,
1423
round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1426
static void enic_free_intr(struct enic *enic)
1428
struct net_device *netdev = enic->netdev;
1431
switch (vnic_dev_get_intr_mode(enic->vdev)) {
1432
case VNIC_DEV_INTR_MODE_INTX:
1433
free_irq(enic->pdev->irq, netdev);
1435
case VNIC_DEV_INTR_MODE_MSI:
1436
free_irq(enic->pdev->irq, enic);
1438
case VNIC_DEV_INTR_MODE_MSIX:
1439
for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1440
if (enic->msix[i].requested)
1441
free_irq(enic->msix_entry[i].vector,
1442
enic->msix[i].devid);
1449
static int enic_request_intr(struct enic *enic)
1451
struct net_device *netdev = enic->netdev;
1452
unsigned int i, intr;
1455
switch (vnic_dev_get_intr_mode(enic->vdev)) {
1457
case VNIC_DEV_INTR_MODE_INTX:
1459
err = request_irq(enic->pdev->irq, enic_isr_legacy,
1460
IRQF_SHARED, netdev->name, netdev);
1463
case VNIC_DEV_INTR_MODE_MSI:
1465
err = request_irq(enic->pdev->irq, enic_isr_msi,
1466
0, netdev->name, enic);
1469
case VNIC_DEV_INTR_MODE_MSIX:
1471
for (i = 0; i < enic->rq_count; i++) {
1472
intr = enic_msix_rq_intr(enic, i);
1473
sprintf(enic->msix[intr].devname,
1474
"%.11s-rx-%d", netdev->name, i);
1475
enic->msix[intr].isr = enic_isr_msix_rq;
1476
enic->msix[intr].devid = &enic->napi[i];
1479
for (i = 0; i < enic->wq_count; i++) {
1480
intr = enic_msix_wq_intr(enic, i);
1481
sprintf(enic->msix[intr].devname,
1482
"%.11s-tx-%d", netdev->name, i);
1483
enic->msix[intr].isr = enic_isr_msix_wq;
1484
enic->msix[intr].devid = enic;
1487
intr = enic_msix_err_intr(enic);
1488
sprintf(enic->msix[intr].devname,
1489
"%.11s-err", netdev->name);
1490
enic->msix[intr].isr = enic_isr_msix_err;
1491
enic->msix[intr].devid = enic;
1493
intr = enic_msix_notify_intr(enic);
1494
sprintf(enic->msix[intr].devname,
1495
"%.11s-notify", netdev->name);
1496
enic->msix[intr].isr = enic_isr_msix_notify;
1497
enic->msix[intr].devid = enic;
1499
for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1500
enic->msix[i].requested = 0;
1502
for (i = 0; i < enic->intr_count; i++) {
1503
err = request_irq(enic->msix_entry[i].vector,
1504
enic->msix[i].isr, 0,
1505
enic->msix[i].devname,
1506
enic->msix[i].devid);
1508
enic_free_intr(enic);
1511
enic->msix[i].requested = 1;
1523
static void enic_synchronize_irqs(struct enic *enic)
1527
switch (vnic_dev_get_intr_mode(enic->vdev)) {
1528
case VNIC_DEV_INTR_MODE_INTX:
1529
case VNIC_DEV_INTR_MODE_MSI:
1530
synchronize_irq(enic->pdev->irq);
1532
case VNIC_DEV_INTR_MODE_MSIX:
1533
for (i = 0; i < enic->intr_count; i++)
1534
synchronize_irq(enic->msix_entry[i].vector);
1541
static int enic_dev_notify_set(struct enic *enic)
1545
spin_lock(&enic->devcmd_lock);
1546
switch (vnic_dev_get_intr_mode(enic->vdev)) {
1547
case VNIC_DEV_INTR_MODE_INTX:
1548
err = vnic_dev_notify_set(enic->vdev,
1549
enic_legacy_notify_intr());
1551
case VNIC_DEV_INTR_MODE_MSIX:
1552
err = vnic_dev_notify_set(enic->vdev,
1553
enic_msix_notify_intr(enic));
1556
err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1559
spin_unlock(&enic->devcmd_lock);
1564
static void enic_notify_timer_start(struct enic *enic)
1566
switch (vnic_dev_get_intr_mode(enic->vdev)) {
1567
case VNIC_DEV_INTR_MODE_MSI:
1568
mod_timer(&enic->notify_timer, jiffies);
1571
/* Using intr for notification for INTx/MSI-X */
1576
/* rtnl lock is held, process context */
1577
static int enic_open(struct net_device *netdev)
1579
struct enic *enic = netdev_priv(netdev);
1583
err = enic_request_intr(enic);
1585
netdev_err(netdev, "Unable to request irq.\n");
1589
err = enic_dev_notify_set(enic);
1592
"Failed to alloc notify buffer, aborting.\n");
1593
goto err_out_free_intr;
1596
for (i = 0; i < enic->rq_count; i++) {
1597
vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1598
/* Need at least one buffer on ring to get going */
1599
if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1600
netdev_err(netdev, "Unable to alloc receive buffers\n");
1602
goto err_out_notify_unset;
1606
for (i = 0; i < enic->wq_count; i++)
1607
vnic_wq_enable(&enic->wq[i]);
1608
for (i = 0; i < enic->rq_count; i++)
1609
vnic_rq_enable(&enic->rq[i]);
1611
if (!enic_is_dynamic(enic))
1612
enic_dev_add_station_addr(enic);
1614
enic_set_rx_mode(netdev);
1616
netif_wake_queue(netdev);
1618
for (i = 0; i < enic->rq_count; i++)
1619
napi_enable(&enic->napi[i]);
1621
enic_dev_enable(enic);
1623
for (i = 0; i < enic->intr_count; i++)
1624
vnic_intr_unmask(&enic->intr[i]);
1626
enic_notify_timer_start(enic);
1630
err_out_notify_unset:
1631
enic_dev_notify_unset(enic);
1633
enic_free_intr(enic);
1638
/* rtnl lock is held, process context */
1639
static int enic_stop(struct net_device *netdev)
1641
struct enic *enic = netdev_priv(netdev);
1645
for (i = 0; i < enic->intr_count; i++) {
1646
vnic_intr_mask(&enic->intr[i]);
1647
(void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1650
enic_synchronize_irqs(enic);
1652
del_timer_sync(&enic->notify_timer);
1654
enic_dev_disable(enic);
1656
for (i = 0; i < enic->rq_count; i++)
1657
napi_disable(&enic->napi[i]);
1659
netif_carrier_off(netdev);
1660
netif_tx_disable(netdev);
1662
if (!enic_is_dynamic(enic))
1663
enic_dev_del_station_addr(enic);
1665
for (i = 0; i < enic->wq_count; i++) {
1666
err = vnic_wq_disable(&enic->wq[i]);
1670
for (i = 0; i < enic->rq_count; i++) {
1671
err = vnic_rq_disable(&enic->rq[i]);
1676
enic_dev_notify_unset(enic);
1677
enic_free_intr(enic);
1679
for (i = 0; i < enic->wq_count; i++)
1680
vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1681
for (i = 0; i < enic->rq_count; i++)
1682
vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1683
for (i = 0; i < enic->cq_count; i++)
1684
vnic_cq_clean(&enic->cq[i]);
1685
for (i = 0; i < enic->intr_count; i++)
1686
vnic_intr_clean(&enic->intr[i]);
1691
static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1693
struct enic *enic = netdev_priv(netdev);
1694
int running = netif_running(netdev);
1696
if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1699
if (enic_is_dynamic(enic))
1705
netdev->mtu = new_mtu;
1707
if (netdev->mtu > enic->port_mtu)
1709
"interface MTU (%d) set higher than port MTU (%d)\n",
1710
netdev->mtu, enic->port_mtu);
1718
static void enic_change_mtu_work(struct work_struct *work)
1720
struct enic *enic = container_of(work, struct enic, change_mtu_work);
1721
struct net_device *netdev = enic->netdev;
1722
int new_mtu = vnic_dev_mtu(enic->vdev);
1726
new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));
1731
del_timer_sync(&enic->notify_timer);
1733
for (i = 0; i < enic->rq_count; i++)
1734
napi_disable(&enic->napi[i]);
1736
vnic_intr_mask(&enic->intr[0]);
1737
enic_synchronize_irqs(enic);
1738
err = vnic_rq_disable(&enic->rq[0]);
1740
netdev_err(netdev, "Unable to disable RQ.\n");
1743
vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
1744
vnic_cq_clean(&enic->cq[0]);
1745
vnic_intr_clean(&enic->intr[0]);
1747
/* Fill RQ with new_mtu-sized buffers */
1748
netdev->mtu = new_mtu;
1749
vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1750
/* Need at least one buffer on ring to get going */
1751
if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
1752
netdev_err(netdev, "Unable to alloc receive buffers.\n");
1757
vnic_rq_enable(&enic->rq[0]);
1758
napi_enable(&enic->napi[0]);
1759
vnic_intr_unmask(&enic->intr[0]);
1760
enic_notify_timer_start(enic);
1764
netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
1767
#ifdef CONFIG_NET_POLL_CONTROLLER
1768
static void enic_poll_controller(struct net_device *netdev)
1770
struct enic *enic = netdev_priv(netdev);
1771
struct vnic_dev *vdev = enic->vdev;
1772
unsigned int i, intr;
1774
switch (vnic_dev_get_intr_mode(vdev)) {
1775
case VNIC_DEV_INTR_MODE_MSIX:
1776
for (i = 0; i < enic->rq_count; i++) {
1777
intr = enic_msix_rq_intr(enic, i);
1778
enic_isr_msix_rq(enic->msix_entry[intr].vector,
1782
for (i = 0; i < enic->wq_count; i++) {
1783
intr = enic_msix_wq_intr(enic, i);
1784
enic_isr_msix_wq(enic->msix_entry[intr].vector, enic);
1788
case VNIC_DEV_INTR_MODE_MSI:
1789
enic_isr_msi(enic->pdev->irq, enic);
1791
case VNIC_DEV_INTR_MODE_INTX:
1792
enic_isr_legacy(enic->pdev->irq, netdev);
1800
static int enic_dev_wait(struct vnic_dev *vdev,
1801
int (*start)(struct vnic_dev *, int),
1802
int (*finished)(struct vnic_dev *, int *),
1809
BUG_ON(in_interrupt());
1811
err = start(vdev, arg);
1815
/* Wait for func to complete...2 seconds max
1818
time = jiffies + (HZ * 2);
1821
err = finished(vdev, &done);
1828
schedule_timeout_uninterruptible(HZ / 10);
1830
} while (time_after(time, jiffies));
1835
static int enic_dev_open(struct enic *enic)
1839
err = enic_dev_wait(enic->vdev, vnic_dev_open,
1840
vnic_dev_open_done, 0);
1842
dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1848
static int enic_dev_hang_reset(struct enic *enic)
1852
err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1853
vnic_dev_hang_reset_done, 0);
1855
netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1861
static int enic_set_rsskey(struct enic *enic)
1863
dma_addr_t rss_key_buf_pa;
1864
union vnic_rss_key *rss_key_buf_va = NULL;
1865
union vnic_rss_key rss_key = {
1866
.key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
1867
.key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
1868
.key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
1869
.key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
1873
rss_key_buf_va = pci_alloc_consistent(enic->pdev,
1874
sizeof(union vnic_rss_key), &rss_key_buf_pa);
1875
if (!rss_key_buf_va)
1878
memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
1880
spin_lock(&enic->devcmd_lock);
1881
err = enic_set_rss_key(enic,
1883
sizeof(union vnic_rss_key));
1884
spin_unlock(&enic->devcmd_lock);
1886
pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
1887
rss_key_buf_va, rss_key_buf_pa);
1892
static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
1894
dma_addr_t rss_cpu_buf_pa;
1895
union vnic_rss_cpu *rss_cpu_buf_va = NULL;
1899
rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
1900
sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
1901
if (!rss_cpu_buf_va)
1904
for (i = 0; i < (1 << rss_hash_bits); i++)
1905
(*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
1907
spin_lock(&enic->devcmd_lock);
1908
err = enic_set_rss_cpu(enic,
1910
sizeof(union vnic_rss_cpu));
1911
spin_unlock(&enic->devcmd_lock);
1913
pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
1914
rss_cpu_buf_va, rss_cpu_buf_pa);
1919
static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
1920
u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
1922
const u8 tso_ipid_split_en = 0;
1923
const u8 ig_vlan_strip_en = 1;
1926
/* Enable VLAN tag stripping.
1929
spin_lock(&enic->devcmd_lock);
1930
err = enic_set_nic_cfg(enic,
1931
rss_default_cpu, rss_hash_type,
1932
rss_hash_bits, rss_base_cpu,
1933
rss_enable, tso_ipid_split_en,
1935
spin_unlock(&enic->devcmd_lock);
1940
static int enic_set_rss_nic_cfg(struct enic *enic)
1942
struct device *dev = enic_get_dev(enic);
1943
const u8 rss_default_cpu = 0;
1944
const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1945
NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1946
NIC_CFG_RSS_HASH_TYPE_IPV6 |
1947
NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1948
const u8 rss_hash_bits = 7;
1949
const u8 rss_base_cpu = 0;
1950
u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1953
if (!enic_set_rsskey(enic)) {
1954
if (enic_set_rsscpu(enic, rss_hash_bits)) {
1956
dev_warn(dev, "RSS disabled, "
1957
"Failed to set RSS cpu indirection table.");
1961
dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
1965
return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1966
rss_hash_bits, rss_base_cpu, rss_enable);
1969
static void enic_reset(struct work_struct *work)
1971
struct enic *enic = container_of(work, struct enic, reset);
1973
if (!netif_running(enic->netdev))
1978
enic_dev_hang_notify(enic);
1979
enic_stop(enic->netdev);
1980
enic_dev_hang_reset(enic);
1981
enic_reset_addr_lists(enic);
1982
enic_init_vnic_resources(enic);
1983
enic_set_rss_nic_cfg(enic);
1984
enic_dev_set_ig_vlan_rewrite_mode(enic);
1985
enic_open(enic->netdev);
1990
static int enic_set_intr_mode(struct enic *enic)
1992
unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
1993
unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
1996
/* Set interrupt mode (INTx, MSI, MSI-X) depending
1997
* on system capabilities.
2001
* We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2002
* (the second to last INTR is used for WQ/RQ errors)
2003
* (the last INTR is used for notifications)
2006
BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2007
for (i = 0; i < n + m + 2; i++)
2008
enic->msix_entry[i].entry = i;
2010
/* Use multiple RQs if RSS is enabled
2013
if (ENIC_SETTING(enic, RSS) &&
2014
enic->config.intr_mode < 1 &&
2015
enic->rq_count >= n &&
2016
enic->wq_count >= m &&
2017
enic->cq_count >= n + m &&
2018
enic->intr_count >= n + m + 2) {
2020
if (!pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
2024
enic->cq_count = n + m;
2025
enic->intr_count = n + m + 2;
2027
vnic_dev_set_intr_mode(enic->vdev,
2028
VNIC_DEV_INTR_MODE_MSIX);
2034
if (enic->config.intr_mode < 1 &&
2035
enic->rq_count >= 1 &&
2036
enic->wq_count >= m &&
2037
enic->cq_count >= 1 + m &&
2038
enic->intr_count >= 1 + m + 2) {
2039
if (!pci_enable_msix(enic->pdev, enic->msix_entry, 1 + m + 2)) {
2043
enic->cq_count = 1 + m;
2044
enic->intr_count = 1 + m + 2;
2046
vnic_dev_set_intr_mode(enic->vdev,
2047
VNIC_DEV_INTR_MODE_MSIX);
2055
* We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2058
if (enic->config.intr_mode < 2 &&
2059
enic->rq_count >= 1 &&
2060
enic->wq_count >= 1 &&
2061
enic->cq_count >= 2 &&
2062
enic->intr_count >= 1 &&
2063
!pci_enable_msi(enic->pdev)) {
2068
enic->intr_count = 1;
2070
vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2077
* We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2078
* (the first INTR is used for WQ/RQ)
2079
* (the second INTR is used for WQ/RQ errors)
2080
* (the last INTR is used for notifications)
2083
if (enic->config.intr_mode < 3 &&
2084
enic->rq_count >= 1 &&
2085
enic->wq_count >= 1 &&
2086
enic->cq_count >= 2 &&
2087
enic->intr_count >= 3) {
2092
enic->intr_count = 3;
2094
vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2099
vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2104
static void enic_clear_intr_mode(struct enic *enic)
2106
switch (vnic_dev_get_intr_mode(enic->vdev)) {
2107
case VNIC_DEV_INTR_MODE_MSIX:
2108
pci_disable_msix(enic->pdev);
2110
case VNIC_DEV_INTR_MODE_MSI:
2111
pci_disable_msi(enic->pdev);
2117
vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2120
static const struct net_device_ops enic_netdev_dynamic_ops = {
2121
.ndo_open = enic_open,
2122
.ndo_stop = enic_stop,
2123
.ndo_start_xmit = enic_hard_start_xmit,
2124
.ndo_get_stats64 = enic_get_stats,
2125
.ndo_validate_addr = eth_validate_addr,
2126
.ndo_set_rx_mode = enic_set_rx_mode,
2127
.ndo_set_mac_address = enic_set_mac_address_dynamic,
2128
.ndo_change_mtu = enic_change_mtu,
2129
.ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2130
.ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2131
.ndo_tx_timeout = enic_tx_timeout,
2132
.ndo_set_vf_port = enic_set_vf_port,
2133
.ndo_get_vf_port = enic_get_vf_port,
2134
.ndo_set_vf_mac = enic_set_vf_mac,
2135
#ifdef CONFIG_NET_POLL_CONTROLLER
2136
.ndo_poll_controller = enic_poll_controller,
2140
static const struct net_device_ops enic_netdev_ops = {
2141
.ndo_open = enic_open,
2142
.ndo_stop = enic_stop,
2143
.ndo_start_xmit = enic_hard_start_xmit,
2144
.ndo_get_stats64 = enic_get_stats,
2145
.ndo_validate_addr = eth_validate_addr,
2146
.ndo_set_mac_address = enic_set_mac_address,
2147
.ndo_set_rx_mode = enic_set_rx_mode,
2148
.ndo_change_mtu = enic_change_mtu,
2149
.ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2150
.ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2151
.ndo_tx_timeout = enic_tx_timeout,
2152
.ndo_set_vf_port = enic_set_vf_port,
2153
.ndo_get_vf_port = enic_get_vf_port,
2154
.ndo_set_vf_mac = enic_set_vf_mac,
2155
#ifdef CONFIG_NET_POLL_CONTROLLER
2156
.ndo_poll_controller = enic_poll_controller,
2160
static void enic_dev_deinit(struct enic *enic)
2164
for (i = 0; i < enic->rq_count; i++)
2165
netif_napi_del(&enic->napi[i]);
2167
enic_free_vnic_resources(enic);
2168
enic_clear_intr_mode(enic);
2171
static int enic_dev_init(struct enic *enic)
2173
struct device *dev = enic_get_dev(enic);
2174
struct net_device *netdev = enic->netdev;
2178
/* Get interrupt coalesce timer info */
2179
err = enic_dev_intr_coal_timer_info(enic);
2181
dev_warn(dev, "Using default conversion factor for "
2182
"interrupt coalesce timer\n");
2183
vnic_dev_intr_coal_timer_info_default(enic->vdev);
2186
/* Get vNIC configuration
2189
err = enic_get_vnic_config(enic);
2191
dev_err(dev, "Get vNIC configuration failed, aborting\n");
2195
/* Get available resource counts
2198
enic_get_res_counts(enic);
2200
/* Set interrupt mode based on resource counts and system
2204
err = enic_set_intr_mode(enic);
2206
dev_err(dev, "Failed to set intr mode based on resource "
2207
"counts and system capabilities, aborting\n");
2211
/* Allocate and configure vNIC resources
2214
err = enic_alloc_vnic_resources(enic);
2216
dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2217
goto err_out_free_vnic_resources;
2220
enic_init_vnic_resources(enic);
2222
err = enic_set_rss_nic_cfg(enic);
2224
dev_err(dev, "Failed to config nic, aborting\n");
2225
goto err_out_free_vnic_resources;
2228
switch (vnic_dev_get_intr_mode(enic->vdev)) {
2230
netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2232
case VNIC_DEV_INTR_MODE_MSIX:
2233
for (i = 0; i < enic->rq_count; i++)
2234
netif_napi_add(netdev, &enic->napi[i],
2235
enic_poll_msix, 64);
2241
err_out_free_vnic_resources:
2242
enic_clear_intr_mode(enic);
2243
enic_free_vnic_resources(enic);
2248
static void enic_iounmap(struct enic *enic)
2252
for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2253
if (enic->bar[i].vaddr)
2254
iounmap(enic->bar[i].vaddr);
2257
static int __devinit enic_probe(struct pci_dev *pdev,
2258
const struct pci_device_id *ent)
2260
struct device *dev = &pdev->dev;
2261
struct net_device *netdev;
2267
#ifdef CONFIG_PCI_IOV
2271
/* Allocate net device structure and initialize. Private
2272
* instance data is initialized to zero.
2275
netdev = alloc_etherdev(sizeof(struct enic));
2277
pr_err("Etherdev alloc failed, aborting\n");
2281
pci_set_drvdata(pdev, netdev);
2283
SET_NETDEV_DEV(netdev, &pdev->dev);
2285
enic = netdev_priv(netdev);
2286
enic->netdev = netdev;
2289
/* Setup PCI resources
2292
err = pci_enable_device_mem(pdev);
2294
dev_err(dev, "Cannot enable PCI device, aborting\n");
2295
goto err_out_free_netdev;
2298
err = pci_request_regions(pdev, DRV_NAME);
2300
dev_err(dev, "Cannot request PCI regions, aborting\n");
2301
goto err_out_disable_device;
2304
pci_set_master(pdev);
2306
/* Query PCI controller on system for DMA addressing
2307
* limitation for the device. Try 40-bit first, and
2311
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2313
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2315
dev_err(dev, "No usable DMA configuration, aborting\n");
2316
goto err_out_release_regions;
2318
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2320
dev_err(dev, "Unable to obtain %u-bit DMA "
2321
"for consistent allocations, aborting\n", 32);
2322
goto err_out_release_regions;
2325
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2327
dev_err(dev, "Unable to obtain %u-bit DMA "
2328
"for consistent allocations, aborting\n", 40);
2329
goto err_out_release_regions;
2334
/* Map vNIC resources from BAR0-5
2337
for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2338
if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2340
enic->bar[i].len = pci_resource_len(pdev, i);
2341
enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2342
if (!enic->bar[i].vaddr) {
2343
dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2345
goto err_out_iounmap;
2347
enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2350
/* Register vNIC device
2353
enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2354
ARRAY_SIZE(enic->bar));
2356
dev_err(dev, "vNIC registration failed, aborting\n");
2358
goto err_out_iounmap;
2361
#ifdef CONFIG_PCI_IOV
2362
/* Get number of subvnics */
2363
pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
2365
pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
2366
(u16 *)&enic->num_vfs);
2367
if (enic->num_vfs) {
2368
err = pci_enable_sriov(pdev, enic->num_vfs);
2370
dev_err(dev, "SRIOV enable failed, aborting."
2371
" pci_enable_sriov() returned %d\n",
2373
goto err_out_vnic_unregister;
2375
enic->priv_flags |= ENIC_SRIOV_ENABLED;
2376
num_pps = enic->num_vfs;
2381
/* Allocate structure for port profiles */
2382
enic->pp = kzalloc(num_pps * sizeof(*enic->pp), GFP_KERNEL);
2384
pr_err("port profile alloc failed, aborting\n");
2386
goto err_out_disable_sriov;
2389
/* Issue device open to get device in known state
2392
err = enic_dev_open(enic);
2394
dev_err(dev, "vNIC dev open failed, aborting\n");
2395
goto err_out_free_pp;
2398
/* Setup devcmd lock
2401
spin_lock_init(&enic->devcmd_lock);
2404
* Set ingress vlan rewrite mode before vnic initialization
2407
err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2410
"Failed to set ingress vlan rewrite mode, aborting.\n");
2411
goto err_out_dev_close;
2414
/* Issue device init to initialize the vnic-to-switch link.
2415
* We'll start with carrier off and wait for link UP
2416
* notification later to turn on carrier. We don't need
2417
* to wait here for the vnic-to-switch link initialization
2418
* to complete; link UP notification is the indication that
2419
* the process is complete.
2422
netif_carrier_off(netdev);
2424
/* Do not call dev_init for a dynamic vnic.
2425
* For a dynamic vnic, init_prov_info will be
2426
* called later by an upper layer.
2429
if (!enic_is_dynamic(enic)) {
2430
err = vnic_dev_init(enic->vdev, 0);
2432
dev_err(dev, "vNIC dev init failed, aborting\n");
2433
goto err_out_dev_close;
2437
err = enic_dev_init(enic);
2439
dev_err(dev, "Device initialization failed, aborting\n");
2440
goto err_out_dev_close;
2443
/* Setup notification timer, HW reset task, and wq locks
2446
init_timer(&enic->notify_timer);
2447
enic->notify_timer.function = enic_notify_timer;
2448
enic->notify_timer.data = (unsigned long)enic;
2450
INIT_WORK(&enic->reset, enic_reset);
2451
INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
2453
for (i = 0; i < enic->wq_count; i++)
2454
spin_lock_init(&enic->wq_lock[i]);
2456
/* Register net device
2459
enic->port_mtu = enic->config.mtu;
2460
(void)enic_change_mtu(netdev, enic->port_mtu);
2462
#ifdef CONFIG_PCI_IOV
2463
if (enic_is_dynamic(enic) && pdev->is_virtfn &&
2464
is_zero_ether_addr(enic->mac_addr))
2465
random_ether_addr(enic->mac_addr);
2468
err = enic_set_mac_addr(netdev, enic->mac_addr);
2470
dev_err(dev, "Invalid MAC address, aborting\n");
2471
goto err_out_dev_deinit;
2474
enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2475
enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2477
if (enic_is_dynamic(enic))
2478
netdev->netdev_ops = &enic_netdev_dynamic_ops;
2480
netdev->netdev_ops = &enic_netdev_ops;
2482
netdev->watchdog_timeo = 2 * HZ;
2483
netdev->ethtool_ops = &enic_ethtool_ops;
2485
netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2486
if (ENIC_SETTING(enic, LOOP)) {
2487
netdev->features &= ~NETIF_F_HW_VLAN_TX;
2488
enic->loop_enable = 1;
2489
enic->loop_tag = enic->config.loop_tag;
2490
dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2492
if (ENIC_SETTING(enic, TXCSUM))
2493
netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2494
if (ENIC_SETTING(enic, TSO))
2495
netdev->hw_features |= NETIF_F_TSO |
2496
NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2497
if (ENIC_SETTING(enic, RXCSUM))
2498
netdev->hw_features |= NETIF_F_RXCSUM;
2500
netdev->features |= netdev->hw_features;
2503
netdev->features |= NETIF_F_HIGHDMA;
2505
netdev->priv_flags |= IFF_UNICAST_FLT;
2507
err = register_netdev(netdev);
2509
dev_err(dev, "Cannot register net device, aborting\n");
2510
goto err_out_dev_deinit;
2516
enic_dev_deinit(enic);
2518
vnic_dev_close(enic->vdev);
2521
err_out_disable_sriov:
2522
#ifdef CONFIG_PCI_IOV
2523
if (enic_sriov_enabled(enic)) {
2524
pci_disable_sriov(pdev);
2525
enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2527
err_out_vnic_unregister:
2528
vnic_dev_unregister(enic->vdev);
2532
err_out_release_regions:
2533
pci_release_regions(pdev);
2534
err_out_disable_device:
2535
pci_disable_device(pdev);
2536
err_out_free_netdev:
2537
pci_set_drvdata(pdev, NULL);
2538
free_netdev(netdev);
2543
static void __devexit enic_remove(struct pci_dev *pdev)
2545
struct net_device *netdev = pci_get_drvdata(pdev);
2548
struct enic *enic = netdev_priv(netdev);
2550
cancel_work_sync(&enic->reset);
2551
cancel_work_sync(&enic->change_mtu_work);
2552
unregister_netdev(netdev);
2553
enic_dev_deinit(enic);
2554
vnic_dev_close(enic->vdev);
2555
#ifdef CONFIG_PCI_IOV
2556
if (enic_sriov_enabled(enic)) {
2557
pci_disable_sriov(pdev);
2558
enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2562
vnic_dev_unregister(enic->vdev);
2564
pci_release_regions(pdev);
2565
pci_disable_device(pdev);
2566
pci_set_drvdata(pdev, NULL);
2567
free_netdev(netdev);
2571
static struct pci_driver enic_driver = {
2573
.id_table = enic_id_table,
2574
.probe = enic_probe,
2575
.remove = __devexit_p(enic_remove),
2578
static int __init enic_init_module(void)
2580
pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2582
return pci_register_driver(&enic_driver);
2585
static void __exit enic_cleanup_module(void)
2587
pci_unregister_driver(&enic_driver);
2590
module_init(enic_init_module);
2591
module_exit(enic_cleanup_module);