/*
 * Copyright (C) 2005 - 2013 Emulex
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.  The full GNU General
 * Public License is included in this distribution in the file called COPYING.
 *
 * Contact Information:
 * linux-drivers@emulex.com
 *
 * Emulex
 * 3333 Susan Street
 * Costa Mesa, CA 92626
 */

#include <linux/prefetch.h>
#include <linux/module.h>
#include "be.h"
#include "be_cmds.h"
#include <asm/div64.h>
#include <linux/aer.h>
#include <linux/if_bridge.h>

MODULE_VERSION(DRV_VER);
MODULE_DEVICE_TABLE(pci, be_dev_ids);
MODULE_DESCRIPTION(DRV_DESC " " DRV_VER);
MODULE_AUTHOR("Emulex Corporation");
MODULE_LICENSE("GPL");

static unsigned int num_vfs;
module_param(num_vfs, uint, S_IRUGO);
MODULE_PARM_DESC(num_vfs, "Number of PCI VFs to initialize");

static ushort rx_frag_size = 2048;
module_param(rx_frag_size, ushort, S_IRUGO);
MODULE_PARM_DESC(rx_frag_size, "Size of a fragment that holds rcvd data.");

static DEFINE_PCI_DEVICE_TABLE(be_dev_ids) = {
        { PCI_DEVICE(BE_VENDOR_ID, BE_DEVICE_ID1) },
        { PCI_DEVICE(BE_VENDOR_ID, BE_DEVICE_ID2) },
        { PCI_DEVICE(BE_VENDOR_ID, OC_DEVICE_ID1) },
        { PCI_DEVICE(BE_VENDOR_ID, OC_DEVICE_ID2) },
        { PCI_DEVICE(EMULEX_VENDOR_ID, OC_DEVICE_ID3)},
        { PCI_DEVICE(EMULEX_VENDOR_ID, OC_DEVICE_ID4)},
        { PCI_DEVICE(EMULEX_VENDOR_ID, OC_DEVICE_ID5)},
        { PCI_DEVICE(EMULEX_VENDOR_ID, OC_DEVICE_ID6)},
        { 0 }
};
MODULE_DEVICE_TABLE(pci, be_dev_ids);
/* UE Status Low CSR */
static const char * const ue_status_low_desc[] = {
        "CEV",
        "CTX",
        "DBUF",
        "ERX",
        "Host",
        "MPU",
        "NDMA",
        "PTC ",
        "RDMA ",
        "RXF ",
        "RXIPS ",
        "RXULP0 ",
        "RXULP1 ",
        "RXULP2 ",
        "TIM ",
        "TPOST ",
        "TPRE ",
        "TXIPS ",
        "TXULP0 ",
        "TXULP1 ",
        "UC ",
        "WDMA ",
        "TXULP2 ",
        "HOST1 ",
        "P0_OB_LINK ",
        "P1_OB_LINK ",
        "HOST_GPIO ",
        "MBOX ",
        "AXGMAC0",
        "AXGMAC1",
        "JTAG",
        "MPU_INTPEND"
};
/* UE Status High CSR */
static const char * const ue_status_hi_desc[] = {
        "LPCMEMHOST",
        "MGMT_MAC",
        "PCS0ONLINE",
        "MPU_IRAM",
        "PCS1ONLINE",
        "PCTL0",
        "PCTL1",
        "PMEM",
        "RR",
        "TXPB",
        "RXPP",
        "XAUI",
        "TXP",
        "ARM",
        "IPC",
        "HOST2",
        "HOST3",
        "HOST4",
        "HOST5",
        "HOST6",
        "HOST7",
        "HOST8",
        "HOST9",
        "NETC",
        "Unknown",
        "Unknown",
        "Unknown",
        "Unknown",
        "Unknown",
        "Unknown",
        "Unknown",
        "Unknown"
};

/* Is BE in a multi-channel mode */
static inline bool be_is_mc(struct be_adapter *adapter) {
        return (adapter->function_mode & FLEX10_MODE ||
                adapter->function_mode & VNIC_MODE ||
                adapter->function_mode & UMC_ENABLED);
}

static void be_queue_free(struct be_adapter *adapter, struct be_queue_info *q)
{
        struct be_dma_mem *mem = &q->dma_mem;
        if (mem->va) {
                dma_free_coherent(&adapter->pdev->dev, mem->size, mem->va,
                                  mem->dma);
                mem->va = NULL;
        }
}

static int be_queue_alloc(struct be_adapter *adapter, struct be_queue_info *q,
                u16 len, u16 entry_size)
{
        struct be_dma_mem *mem = &q->dma_mem;

        memset(q, 0, sizeof(*q));
        q->len = len;
        q->entry_size = entry_size;
        mem->size = len * entry_size;
        mem->va = dma_zalloc_coherent(&adapter->pdev->dev, mem->size, &mem->dma,
                                      GFP_KERNEL);
        if (!mem->va)
                return -ENOMEM;
        return 0;
}

static void be_reg_intr_set(struct be_adapter *adapter, bool enable)
{
        u32 reg, enabled;

        pci_read_config_dword(adapter->pdev, PCICFG_MEMBAR_CTRL_INT_CTRL_OFFSET,
                                &reg);
        enabled = reg & MEMBAR_CTRL_INT_CTRL_HOSTINTR_MASK;

        if (!enabled && enable)
                reg |= MEMBAR_CTRL_INT_CTRL_HOSTINTR_MASK;
        else if (enabled && !enable)
                reg &= ~MEMBAR_CTRL_INT_CTRL_HOSTINTR_MASK;
        else
                return;

        pci_write_config_dword(adapter->pdev,
                        PCICFG_MEMBAR_CTRL_INT_CTRL_OFFSET, reg);
}

static void be_intr_set(struct be_adapter *adapter, bool enable)
{
        int status = 0;

        /* On lancer interrupts can't be controlled via this register */
        if (lancer_chip(adapter))
                return;

        if (adapter->eeh_error)
                return;

        status = be_cmd_intr_set(adapter, enable);
        if (status)
                be_reg_intr_set(adapter, enable);
}

static void be_rxq_notify(struct be_adapter *adapter, u16 qid, u16 posted)
{
        u32 val = 0;
        val |= qid & DB_RQ_RING_ID_MASK;
        val |= posted << DB_RQ_NUM_POSTED_SHIFT;

        wmb();
        iowrite32(val, adapter->db + DB_RQ_OFFSET);
}

static void be_txq_notify(struct be_adapter *adapter, struct be_tx_obj *txo,
                          u16 posted)
{
        u32 val = 0;
        val |= txo->q.id & DB_TXULP_RING_ID_MASK;
        val |= (posted & DB_TXULP_NUM_POSTED_MASK) << DB_TXULP_NUM_POSTED_SHIFT;

        wmb();
        iowrite32(val, adapter->db + txo->db_offset);
}

static void be_eq_notify(struct be_adapter *adapter, u16 qid,
                bool arm, bool clear_int, u16 num_popped)
{
        u32 val = 0;
        val |= qid & DB_EQ_RING_ID_MASK;
        val |= ((qid & DB_EQ_RING_ID_EXT_MASK) <<
                        DB_EQ_RING_ID_EXT_MASK_SHIFT);

        if (adapter->eeh_error)
                return;

        if (arm)
                val |= 1 << DB_EQ_REARM_SHIFT;
        if (clear_int)
                val |= 1 << DB_EQ_CLR_SHIFT;
        val |= 1 << DB_EQ_EVNT_SHIFT;
        val |= num_popped << DB_EQ_NUM_POPPED_SHIFT;
        iowrite32(val, adapter->db + DB_EQ_OFFSET);
}

void be_cq_notify(struct be_adapter *adapter, u16 qid, bool arm, u16 num_popped)
{
        u32 val = 0;
        val |= qid & DB_CQ_RING_ID_MASK;
        val |= ((qid & DB_CQ_RING_ID_EXT_MASK) <<
                        DB_CQ_RING_ID_EXT_MASK_SHIFT);

        if (adapter->eeh_error)
                return;

        if (arm)
                val |= 1 << DB_CQ_REARM_SHIFT;
        val |= num_popped << DB_CQ_NUM_POPPED_SHIFT;
        iowrite32(val, adapter->db + DB_CQ_OFFSET);
}

static int be_mac_addr_set(struct net_device *netdev, void *p)
{
        struct be_adapter *adapter = netdev_priv(netdev);
        struct device *dev = &adapter->pdev->dev;
        struct sockaddr *addr = p;
        int status;
        u8 mac[ETH_ALEN];
        u32 old_pmac_id = adapter->pmac_id[0], curr_pmac_id = 0;

        if (!is_valid_ether_addr(addr->sa_data))
                return -EADDRNOTAVAIL;

        /* The PMAC_ADD cmd may fail if the VF doesn't have FILTMGMT
         * privilege or if PF did not provision the new MAC address.
         * On BE3, this cmd will always fail if the VF doesn't have the
         * FILTMGMT privilege. This failure is OK, only if the PF programmed
         * the MAC for the VF.
         */
        status = be_cmd_pmac_add(adapter, (u8 *)addr->sa_data,
                                 adapter->if_handle, &adapter->pmac_id[0], 0);
        if (!status) {
                curr_pmac_id = adapter->pmac_id[0];

                /* Delete the old programmed MAC. This call may fail if the
                 * old MAC was already deleted by the PF driver.
                 */
                if (adapter->pmac_id[0] != old_pmac_id)
                        be_cmd_pmac_del(adapter, adapter->if_handle,
                                        old_pmac_id, 0);
        }

        /* Decide if the new MAC is successfully activated only after
         * querying the FW
         */
        status = be_cmd_get_active_mac(adapter, curr_pmac_id, mac);
        if (status)
                goto err;

        /* The MAC change did not happen, either due to lack of privilege
         * or PF didn't pre-provision.
         */
        if (memcmp(addr->sa_data, mac, ETH_ALEN)) {
                status = -EPERM;
                goto err;
        }

        memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
        dev_info(dev, "MAC address changed to %pM\n", mac);
        return 0;
err:
        dev_warn(dev, "MAC address change to %pM failed\n", addr->sa_data);
        return status;
}

/* BE2 supports only v0 cmd */
static void *hw_stats_from_cmd(struct be_adapter *adapter)
{
        if (BE2_chip(adapter)) {
                struct be_cmd_resp_get_stats_v0 *cmd = adapter->stats_cmd.va;

                return &cmd->hw_stats;
        } else  {
                struct be_cmd_resp_get_stats_v1 *cmd = adapter->stats_cmd.va;

                return &cmd->hw_stats;
        }
}

/* BE2 supports only v0 cmd */
static void *be_erx_stats_from_cmd(struct be_adapter *adapter)
{
        if (BE2_chip(adapter)) {
                struct be_hw_stats_v0 *hw_stats = hw_stats_from_cmd(adapter);

                return &hw_stats->erx;
        } else {
                struct be_hw_stats_v1 *hw_stats = hw_stats_from_cmd(adapter);

                return &hw_stats->erx;
        }
}

static void populate_be_v0_stats(struct be_adapter *adapter)
{
        struct be_hw_stats_v0 *hw_stats = hw_stats_from_cmd(adapter);
        struct be_pmem_stats *pmem_sts = &hw_stats->pmem;
        struct be_rxf_stats_v0 *rxf_stats = &hw_stats->rxf;
        struct be_port_rxf_stats_v0 *port_stats =
                                        &rxf_stats->port[adapter->port_num];
        struct be_drv_stats *drvs = &adapter->drv_stats;

        be_dws_le_to_cpu(hw_stats, sizeof(*hw_stats));
        drvs->rx_pause_frames = port_stats->rx_pause_frames;
        drvs->rx_crc_errors = port_stats->rx_crc_errors;
        drvs->rx_control_frames = port_stats->rx_control_frames;
        drvs->rx_in_range_errors = port_stats->rx_in_range_errors;
        drvs->rx_frame_too_long = port_stats->rx_frame_too_long;
        drvs->rx_dropped_runt = port_stats->rx_dropped_runt;
        drvs->rx_ip_checksum_errs = port_stats->rx_ip_checksum_errs;
        drvs->rx_tcp_checksum_errs = port_stats->rx_tcp_checksum_errs;
        drvs->rx_udp_checksum_errs = port_stats->rx_udp_checksum_errs;
        drvs->rxpp_fifo_overflow_drop = port_stats->rx_fifo_overflow;
        drvs->rx_dropped_tcp_length = port_stats->rx_dropped_tcp_length;
        drvs->rx_dropped_too_small = port_stats->rx_dropped_too_small;
        drvs->rx_dropped_too_short = port_stats->rx_dropped_too_short;
        drvs->rx_out_range_errors = port_stats->rx_out_range_errors;
        drvs->rx_input_fifo_overflow_drop = port_stats->rx_input_fifo_overflow;
        drvs->rx_dropped_header_too_small =
                port_stats->rx_dropped_header_too_small;
        drvs->rx_address_filtered =
                                        port_stats->rx_address_filtered +
                                        port_stats->rx_vlan_filtered;
        drvs->rx_alignment_symbol_errors =
                port_stats->rx_alignment_symbol_errors;

        drvs->tx_pauseframes = port_stats->tx_pauseframes;
        drvs->tx_controlframes = port_stats->tx_controlframes;

        if (adapter->port_num)
                drvs->jabber_events = rxf_stats->port1_jabber_events;
        else
                drvs->jabber_events = rxf_stats->port0_jabber_events;
        drvs->rx_drops_no_pbuf = rxf_stats->rx_drops_no_pbuf;
        drvs->rx_drops_no_erx_descr = rxf_stats->rx_drops_no_erx_descr;
        drvs->forwarded_packets = rxf_stats->forwarded_packets;
        drvs->rx_drops_mtu = rxf_stats->rx_drops_mtu;
        drvs->rx_drops_no_tpre_descr = rxf_stats->rx_drops_no_tpre_descr;
        drvs->rx_drops_too_many_frags = rxf_stats->rx_drops_too_many_frags;
        adapter->drv_stats.eth_red_drops = pmem_sts->eth_red_drops;
}

static void populate_be_v1_stats(struct be_adapter *adapter)
{
        struct be_hw_stats_v1 *hw_stats = hw_stats_from_cmd(adapter);
        struct be_pmem_stats *pmem_sts = &hw_stats->pmem;
        struct be_rxf_stats_v1 *rxf_stats = &hw_stats->rxf;
        struct be_port_rxf_stats_v1 *port_stats =
                                        &rxf_stats->port[adapter->port_num];
        struct be_drv_stats *drvs = &adapter->drv_stats;

        be_dws_le_to_cpu(hw_stats, sizeof(*hw_stats));
        drvs->pmem_fifo_overflow_drop = port_stats->pmem_fifo_overflow_drop;
        drvs->rx_priority_pause_frames = port_stats->rx_priority_pause_frames;
        drvs->rx_pause_frames = port_stats->rx_pause_frames;
        drvs->rx_crc_errors = port_stats->rx_crc_errors;
        drvs->rx_control_frames = port_stats->rx_control_frames;
        drvs->rx_in_range_errors = port_stats->rx_in_range_errors;
        drvs->rx_frame_too_long = port_stats->rx_frame_too_long;
        drvs->rx_dropped_runt = port_stats->rx_dropped_runt;
        drvs->rx_ip_checksum_errs = port_stats->rx_ip_checksum_errs;
        drvs->rx_tcp_checksum_errs = port_stats->rx_tcp_checksum_errs;
        drvs->rx_udp_checksum_errs = port_stats->rx_udp_checksum_errs;
        drvs->rx_dropped_tcp_length = port_stats->rx_dropped_tcp_length;
        drvs->rx_dropped_too_small = port_stats->rx_dropped_too_small;
        drvs->rx_dropped_too_short = port_stats->rx_dropped_too_short;
        drvs->rx_out_range_errors = port_stats->rx_out_range_errors;
        drvs->rx_dropped_header_too_small =
                port_stats->rx_dropped_header_too_small;
        drvs->rx_input_fifo_overflow_drop =
                port_stats->rx_input_fifo_overflow_drop;
        drvs->rx_address_filtered = port_stats->rx_address_filtered;
        drvs->rx_alignment_symbol_errors =
                port_stats->rx_alignment_symbol_errors;
        drvs->rxpp_fifo_overflow_drop = port_stats->rxpp_fifo_overflow_drop;
        drvs->tx_pauseframes = port_stats->tx_pauseframes;
        drvs->tx_controlframes = port_stats->tx_controlframes;
        drvs->tx_priority_pauseframes = port_stats->tx_priority_pauseframes;
        drvs->jabber_events = port_stats->jabber_events;
        drvs->rx_drops_no_pbuf = rxf_stats->rx_drops_no_pbuf;
        drvs->rx_drops_no_erx_descr = rxf_stats->rx_drops_no_erx_descr;
        drvs->forwarded_packets = rxf_stats->forwarded_packets;
        drvs->rx_drops_mtu = rxf_stats->rx_drops_mtu;
        drvs->rx_drops_no_tpre_descr = rxf_stats->rx_drops_no_tpre_descr;
        drvs->rx_drops_too_many_frags = rxf_stats->rx_drops_too_many_frags;
        adapter->drv_stats.eth_red_drops = pmem_sts->eth_red_drops;
}

static void populate_lancer_stats(struct be_adapter *adapter)
{

        struct be_drv_stats *drvs = &adapter->drv_stats;
        struct lancer_pport_stats *pport_stats =
                                        pport_stats_from_cmd(adapter);

        be_dws_le_to_cpu(pport_stats, sizeof(*pport_stats));
        drvs->rx_pause_frames = pport_stats->rx_pause_frames_lo;
        drvs->rx_crc_errors = pport_stats->rx_crc_errors_lo;
        drvs->rx_control_frames = pport_stats->rx_control_frames_lo;
        drvs->rx_in_range_errors = pport_stats->rx_in_range_errors;
        drvs->rx_frame_too_long = pport_stats->rx_frames_too_long_lo;
        drvs->rx_dropped_runt = pport_stats->rx_dropped_runt;
        drvs->rx_ip_checksum_errs = pport_stats->rx_ip_checksum_errors;
        drvs->rx_tcp_checksum_errs = pport_stats->rx_tcp_checksum_errors;
        drvs->rx_udp_checksum_errs = pport_stats->rx_udp_checksum_errors;
        drvs->rx_dropped_tcp_length =
                                pport_stats->rx_dropped_invalid_tcp_length;
        drvs->rx_dropped_too_small = pport_stats->rx_dropped_too_small;
        drvs->rx_dropped_too_short = pport_stats->rx_dropped_too_short;
        drvs->rx_out_range_errors = pport_stats->rx_out_of_range_errors;
        drvs->rx_dropped_header_too_small =
                                pport_stats->rx_dropped_header_too_small;
        drvs->rx_input_fifo_overflow_drop = pport_stats->rx_fifo_overflow;
        drvs->rx_address_filtered =
                                        pport_stats->rx_address_filtered +
                                        pport_stats->rx_vlan_filtered;
        drvs->rx_alignment_symbol_errors = pport_stats->rx_symbol_errors_lo;
        drvs->rxpp_fifo_overflow_drop = pport_stats->rx_fifo_overflow;
        drvs->tx_pauseframes = pport_stats->tx_pause_frames_lo;
        drvs->tx_controlframes = pport_stats->tx_control_frames_lo;
        drvs->jabber_events = pport_stats->rx_jabbers;
        drvs->forwarded_packets = pport_stats->num_forwards_lo;
        drvs->rx_drops_mtu = pport_stats->rx_drops_mtu_lo;
        drvs->rx_drops_too_many_frags =
                                pport_stats->rx_drops_too_many_frags_lo;
}

static void accumulate_16bit_val(u32 *acc, u16 val)
{
#define lo(x)                   (x & 0xFFFF)
#define hi(x)                   (x & 0xFFFF0000)
        bool wrapped = val < lo(*acc);
        u32 newacc = hi(*acc) + val;

        if (wrapped)
                newacc += 65536;
        ACCESS_ONCE(*acc) = newacc;
}

static void populate_erx_stats(struct be_adapter *adapter,
                        struct be_rx_obj *rxo,
                        u32 erx_stat)
{
        if (!BEx_chip(adapter))
                rx_stats(rxo)->rx_drops_no_frags = erx_stat;
        else
                /* below erx HW counter can actually wrap around after
                 * 65535. Driver accumulates a 32-bit value
                 */
                accumulate_16bit_val(&rx_stats(rxo)->rx_drops_no_frags,
                                     (u16)erx_stat);
}

void be_parse_stats(struct be_adapter *adapter)
{
        struct be_erx_stats_v1 *erx = be_erx_stats_from_cmd(adapter);
        struct be_rx_obj *rxo;
        int i;
        u32 erx_stat;

        if (lancer_chip(adapter)) {
                populate_lancer_stats(adapter);
        } else {
                if (BE2_chip(adapter))
                        populate_be_v0_stats(adapter);
                else
                        /* for BE3 and Skyhawk */
                        populate_be_v1_stats(adapter);

                /* as erx_v1 is longer than v0, ok to use v1 for v0 access */
                for_all_rx_queues(adapter, rxo, i) {
                        erx_stat = erx->rx_drops_no_fragments[rxo->q.id];
                        populate_erx_stats(adapter, rxo, erx_stat);
                }
        }
}

static struct rtnl_link_stats64 *be_get_stats64(struct net_device *netdev,
                                        struct rtnl_link_stats64 *stats)
{
        struct be_adapter *adapter = netdev_priv(netdev);
        struct be_drv_stats *drvs = &adapter->drv_stats;
        struct be_rx_obj *rxo;
        struct be_tx_obj *txo;
        u64 pkts, bytes;
        unsigned int start;
        int i;

        for_all_rx_queues(adapter, rxo, i) {
                const struct be_rx_stats *rx_stats = rx_stats(rxo);
                do {
                        start = u64_stats_fetch_begin_bh(&rx_stats->sync);
                        pkts = rx_stats(rxo)->rx_pkts;
                        bytes = rx_stats(rxo)->rx_bytes;
                } while (u64_stats_fetch_retry_bh(&rx_stats->sync, start));
                stats->rx_packets += pkts;
                stats->rx_bytes += bytes;
                stats->multicast += rx_stats(rxo)->rx_mcast_pkts;
                stats->rx_dropped += rx_stats(rxo)->rx_drops_no_skbs +
                                        rx_stats(rxo)->rx_drops_no_frags;
        }

        for_all_tx_queues(adapter, txo, i) {
                const struct be_tx_stats *tx_stats = tx_stats(txo);
                do {
                        start = u64_stats_fetch_begin_bh(&tx_stats->sync);
                        pkts = tx_stats(txo)->tx_pkts;
                        bytes = tx_stats(txo)->tx_bytes;
                } while (u64_stats_fetch_retry_bh(&tx_stats->sync, start));
                stats->tx_packets += pkts;
                stats->tx_bytes += bytes;
        }

        /* bad pkts received */
        stats->rx_errors = drvs->rx_crc_errors +
                drvs->rx_alignment_symbol_errors +
                drvs->rx_in_range_errors +
                drvs->rx_out_range_errors +
                drvs->rx_frame_too_long +
                drvs->rx_dropped_too_small +
                drvs->rx_dropped_too_short +
                drvs->rx_dropped_header_too_small +
                drvs->rx_dropped_tcp_length +
                drvs->rx_dropped_runt;

        /* detailed rx errors */
        stats->rx_length_errors = drvs->rx_in_range_errors +
                drvs->rx_out_range_errors +
                drvs->rx_frame_too_long;

        stats->rx_crc_errors = drvs->rx_crc_errors;

        /* frame alignment errors */
        stats->rx_frame_errors = drvs->rx_alignment_symbol_errors;

        /* receiver fifo overrun */
        /* drops_no_pbuf is no per i/f, it's per BE card */
        stats->rx_fifo_errors = drvs->rxpp_fifo_overflow_drop +
                                drvs->rx_input_fifo_overflow_drop +
                                drvs->rx_drops_no_pbuf;
        return stats;
}

void be_link_status_update(struct be_adapter *adapter, u8 link_status)
{
        struct net_device *netdev = adapter->netdev;

        if (!(adapter->flags & BE_FLAGS_LINK_STATUS_INIT)) {
                netif_carrier_off(netdev);
                adapter->flags |= BE_FLAGS_LINK_STATUS_INIT;
        }

        if ((link_status & LINK_STATUS_MASK) == LINK_UP)
                netif_carrier_on(netdev);
        else
                netif_carrier_off(netdev);
}

static void be_tx_stats_update(struct be_tx_obj *txo,
                        u32 wrb_cnt, u32 copied, u32 gso_segs, bool stopped)
{
        struct be_tx_stats *stats = tx_stats(txo);

        u64_stats_update_begin(&stats->sync);
        stats->tx_reqs++;
        stats->tx_wrbs += wrb_cnt;
        stats->tx_bytes += copied;
        stats->tx_pkts += (gso_segs ? gso_segs : 1);
        if (stopped)
                stats->tx_stops++;
        u64_stats_update_end(&stats->sync);
}

/* Determine number of WRB entries needed to xmit data in an skb */
static u32 wrb_cnt_for_skb(struct be_adapter *adapter, struct sk_buff *skb,
                                                                bool *dummy)
{
        int cnt = (skb->len > skb->data_len);

        cnt += skb_shinfo(skb)->nr_frags;

        /* to account for hdr wrb */
        cnt++;
        if (lancer_chip(adapter) || !(cnt & 1)) {
                *dummy = false;
        } else {
                /* add a dummy to make it an even num */
                cnt++;
                *dummy = true;
        }
        BUG_ON(cnt > BE_MAX_TX_FRAG_COUNT);
        return cnt;
}

static inline void wrb_fill(struct be_eth_wrb *wrb, u64 addr, int len)
{
        wrb->frag_pa_hi = upper_32_bits(addr);
        wrb->frag_pa_lo = addr & 0xFFFFFFFF;
        wrb->frag_len = len & ETH_WRB_FRAG_LEN_MASK;
        wrb->rsvd0 = 0;
}

static inline u16 be_get_tx_vlan_tag(struct be_adapter *adapter,
                                        struct sk_buff *skb)
{
        u8 vlan_prio;
        u16 vlan_tag;

        vlan_tag = vlan_tx_tag_get(skb);
        vlan_prio = (vlan_tag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
        /* If vlan priority provided by OS is NOT in available bmap */
        if (!(adapter->vlan_prio_bmap & (1 << vlan_prio)))
                vlan_tag = (vlan_tag & ~VLAN_PRIO_MASK) |
                                adapter->recommended_prio;

        return vlan_tag;
}

static void wrb_fill_hdr(struct be_adapter *adapter, struct be_eth_hdr_wrb *hdr,
                struct sk_buff *skb, u32 wrb_cnt, u32 len, bool skip_hw_vlan)
{
        u16 vlan_tag;

        memset(hdr, 0, sizeof(*hdr));

        AMAP_SET_BITS(struct amap_eth_hdr_wrb, crc, hdr, 1);

        if (skb_is_gso(skb)) {
                AMAP_SET_BITS(struct amap_eth_hdr_wrb, lso, hdr, 1);
                AMAP_SET_BITS(struct amap_eth_hdr_wrb, lso_mss,
                        hdr, skb_shinfo(skb)->gso_size);
                if (skb_is_gso_v6(skb) && !lancer_chip(adapter))
                        AMAP_SET_BITS(struct amap_eth_hdr_wrb, lso6, hdr, 1);
        } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
                if (is_tcp_pkt(skb))
                        AMAP_SET_BITS(struct amap_eth_hdr_wrb, tcpcs, hdr, 1);
                else if (is_udp_pkt(skb))
                        AMAP_SET_BITS(struct amap_eth_hdr_wrb, udpcs, hdr, 1);
        }

        if (vlan_tx_tag_present(skb)) {
                AMAP_SET_BITS(struct amap_eth_hdr_wrb, vlan, hdr, 1);
                vlan_tag = be_get_tx_vlan_tag(adapter, skb);
                AMAP_SET_BITS(struct amap_eth_hdr_wrb, vlan_tag, hdr, vlan_tag);
        }

        /* To skip HW VLAN tagging: evt = 1, compl = 0 */
        AMAP_SET_BITS(struct amap_eth_hdr_wrb, complete, hdr, !skip_hw_vlan);
        AMAP_SET_BITS(struct amap_eth_hdr_wrb, event, hdr, 1);
        AMAP_SET_BITS(struct amap_eth_hdr_wrb, num_wrb, hdr, wrb_cnt);
        AMAP_SET_BITS(struct amap_eth_hdr_wrb, len, hdr, len);
}

static void unmap_tx_frag(struct device *dev, struct be_eth_wrb *wrb,
                bool unmap_single)
{
        dma_addr_t dma;

        be_dws_le_to_cpu(wrb, sizeof(*wrb));

        dma = (u64)wrb->frag_pa_hi << 32 | (u64)wrb->frag_pa_lo;
        if (wrb->frag_len) {
                if (unmap_single)
                        dma_unmap_single(dev, dma, wrb->frag_len,
                                         DMA_TO_DEVICE);
                else
                        dma_unmap_page(dev, dma, wrb->frag_len, DMA_TO_DEVICE);
        }
}

static int make_tx_wrbs(struct be_adapter *adapter, struct be_queue_info *txq,
                struct sk_buff *skb, u32 wrb_cnt, bool dummy_wrb,
                bool skip_hw_vlan)
{
        dma_addr_t busaddr;
        int i, copied = 0;
        struct device *dev = &adapter->pdev->dev;
        struct sk_buff *first_skb = skb;
        struct be_eth_wrb *wrb;
        struct be_eth_hdr_wrb *hdr;
        bool map_single = false;
        u16 map_head;

        hdr = queue_head_node(txq);
        queue_head_inc(txq);
        map_head = txq->head;

        if (skb->len > skb->data_len) {
                int len = skb_headlen(skb);
                busaddr = dma_map_single(dev, skb->data, len, DMA_TO_DEVICE);
                if (dma_mapping_error(dev, busaddr))
                        goto dma_err;
                map_single = true;
                wrb = queue_head_node(txq);
                wrb_fill(wrb, busaddr, len);
                be_dws_cpu_to_le(wrb, sizeof(*wrb));
                queue_head_inc(txq);
                copied += len;
        }

        for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
                const struct skb_frag_struct *frag =
                        &skb_shinfo(skb)->frags[i];
                busaddr = skb_frag_dma_map(dev, frag, 0,
                                           skb_frag_size(frag), DMA_TO_DEVICE);
                if (dma_mapping_error(dev, busaddr))
                        goto dma_err;
                wrb = queue_head_node(txq);
                wrb_fill(wrb, busaddr, skb_frag_size(frag));
                be_dws_cpu_to_le(wrb, sizeof(*wrb));
                queue_head_inc(txq);
                copied += skb_frag_size(frag);
        }

        if (dummy_wrb) {
                wrb = queue_head_node(txq);
                wrb_fill(wrb, 0, 0);
                be_dws_cpu_to_le(wrb, sizeof(*wrb));
                queue_head_inc(txq);
        }

        wrb_fill_hdr(adapter, hdr, first_skb, wrb_cnt, copied, skip_hw_vlan);
        be_dws_cpu_to_le(hdr, sizeof(*hdr));

        return copied;
dma_err:
        txq->head = map_head;
        while (copied) {
                wrb = queue_head_node(txq);
                unmap_tx_frag(dev, wrb, map_single);
                map_single = false;
                copied -= wrb->frag_len;
                queue_head_inc(txq);
        }
        return 0;
}

static struct sk_buff *be_insert_vlan_in_pkt(struct be_adapter *adapter,
                                             struct sk_buff *skb,
                                             bool *skip_hw_vlan)
{
        u16 vlan_tag = 0;

        skb = skb_share_check(skb, GFP_ATOMIC);
        if (unlikely(!skb))
                return skb;

        if (vlan_tx_tag_present(skb))
                vlan_tag = be_get_tx_vlan_tag(adapter, skb);

        if (qnq_async_evt_rcvd(adapter) && adapter->pvid) {
                if (!vlan_tag)
                        vlan_tag = adapter->pvid;
                /* f/w workaround to set skip_hw_vlan = 1, informs the F/W to
                 * skip VLAN insertion
                 */
                if (skip_hw_vlan)
                        *skip_hw_vlan = true;
        }

        if (vlan_tag) {
                skb = __vlan_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
                if (unlikely(!skb))
                        return skb;
                skb->vlan_tci = 0;
        }

        /* Insert the outer VLAN, if any */
        if (adapter->qnq_vid) {
                vlan_tag = adapter->qnq_vid;
                skb = __vlan_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
                if (unlikely(!skb))
                        return skb;
                if (skip_hw_vlan)
                        *skip_hw_vlan = true;
        }

        return skb;
}

static bool be_ipv6_exthdr_check(struct sk_buff *skb)
{
        struct ethhdr *eh = (struct ethhdr *)skb->data;
        u16 offset = ETH_HLEN;

        if (eh->h_proto == htons(ETH_P_IPV6)) {
                struct ipv6hdr *ip6h = (struct ipv6hdr *)(skb->data + offset);

                offset += sizeof(struct ipv6hdr);
                if (ip6h->nexthdr != NEXTHDR_TCP &&
                    ip6h->nexthdr != NEXTHDR_UDP) {
                        struct ipv6_opt_hdr *ehdr =
                                (struct ipv6_opt_hdr *) (skb->data + offset);

                        /* offending pkt: 2nd byte following IPv6 hdr is 0xff */
                        if (ehdr->hdrlen == 0xff)
                                return true;
                }
        }
        return false;
}

static int be_vlan_tag_tx_chk(struct be_adapter *adapter, struct sk_buff *skb)
{
        return vlan_tx_tag_present(skb) || adapter->pvid || adapter->qnq_vid;
}

static int be_ipv6_tx_stall_chk(struct be_adapter *adapter,
                                struct sk_buff *skb)
{
        return BE3_chip(adapter) && be_ipv6_exthdr_check(skb);
}

static struct sk_buff *be_xmit_workarounds(struct be_adapter *adapter,
                                           struct sk_buff *skb,
                                           bool *skip_hw_vlan)
{
        struct vlan_ethhdr *veh = (struct vlan_ethhdr *)skb->data;
        unsigned int eth_hdr_len;
        struct iphdr *ip;

        /* Lancer, SH-R ASICs have a bug wherein Packets that are 32 bytes or less
         * may cause a transmit stall on that port. So the work-around is to
         * pad short packets (<= 32 bytes) to a 36-byte length.
         */
        if (unlikely(!BEx_chip(adapter) && skb->len <= 32)) {
                if (skb_padto(skb, 36))
                        goto tx_drop;
                skb->len = 36;
        }

        /* For padded packets, BE HW modifies tot_len field in IP header
         * incorrecly when VLAN tag is inserted by HW.
         * For padded packets, Lancer computes incorrect checksum.
         */
        eth_hdr_len = ntohs(skb->protocol) == ETH_P_8021Q ?
                                                VLAN_ETH_HLEN : ETH_HLEN;
        if (skb->len <= 60 &&
            (lancer_chip(adapter) || vlan_tx_tag_present(skb)) &&
            is_ipv4_pkt(skb)) {
                ip = (struct iphdr *)ip_hdr(skb);
                pskb_trim(skb, eth_hdr_len + ntohs(ip->tot_len));
        }

        /* If vlan tag is already inlined in the packet, skip HW VLAN
         * tagging in UMC mode
         */
        if ((adapter->function_mode & UMC_ENABLED) &&
            veh->h_vlan_proto == htons(ETH_P_8021Q))
                        *skip_hw_vlan = true;

        /* HW has a bug wherein it will calculate CSUM for VLAN
         * pkts even though it is disabled.
         * Manually insert VLAN in pkt.
         */
        if (skb->ip_summed != CHECKSUM_PARTIAL &&
            vlan_tx_tag_present(skb)) {
                skb = be_insert_vlan_in_pkt(adapter, skb, skip_hw_vlan);
                if (unlikely(!skb))
                        goto tx_drop;
        }

        /* HW may lockup when VLAN HW tagging is requested on
         * certain ipv6 packets. Drop such pkts if the HW workaround to
         * skip HW tagging is not enabled by FW.
         */
        if (unlikely(be_ipv6_tx_stall_chk(adapter, skb) &&
            (adapter->pvid || adapter->qnq_vid) &&
            !qnq_async_evt_rcvd(adapter)))
                goto tx_drop;

        /* Manual VLAN tag insertion to prevent:
         * ASIC lockup when the ASIC inserts VLAN tag into
         * certain ipv6 packets. Insert VLAN tags in driver,
         * and set event, completion, vlan bits accordingly
         * in the Tx WRB.
         */
        if (be_ipv6_tx_stall_chk(adapter, skb) &&
            be_vlan_tag_tx_chk(adapter, skb)) {
                skb = be_insert_vlan_in_pkt(adapter, skb, skip_hw_vlan);
                if (unlikely(!skb))
                        goto tx_drop;
        }

        return skb;
tx_drop:
        dev_kfree_skb_any(skb);
        return NULL;
}

static netdev_tx_t be_xmit(struct sk_buff *skb, struct net_device *netdev)
{
        struct be_adapter *adapter = netdev_priv(netdev);
        struct be_tx_obj *txo = &adapter->tx_obj[skb_get_queue_mapping(skb)];
        struct be_queue_info *txq = &txo->q;
        bool dummy_wrb, stopped = false;
        u32 wrb_cnt = 0, copied = 0;
        bool skip_hw_vlan = false;
        u32 start = txq->head;

        skb = be_xmit_workarounds(adapter, skb, &skip_hw_vlan);
        if (!skb)
                return NETDEV_TX_OK;

        wrb_cnt = wrb_cnt_for_skb(adapter, skb, &dummy_wrb);

        copied = make_tx_wrbs(adapter, txq, skb, wrb_cnt, dummy_wrb,
                              skip_hw_vlan);
        if (copied) {
                int gso_segs = skb_shinfo(skb)->gso_segs;

                /* record the sent skb in the sent_skb table */
                BUG_ON(txo->sent_skb_list[start]);
                txo->sent_skb_list[start] = skb;

                /* Ensure txq has space for the next skb; Else stop the queue
                 * *BEFORE* ringing the tx doorbell, so that we serialze the
                 * tx compls of the current transmit which'll wake up the queue
                 */
                atomic_add(wrb_cnt, &txq->used);
                if ((BE_MAX_TX_FRAG_COUNT + atomic_read(&txq->used)) >=
                                                                txq->len) {
                        netif_stop_subqueue(netdev, skb_get_queue_mapping(skb));
                        stopped = true;
                }

                be_txq_notify(adapter, txo, wrb_cnt);

                be_tx_stats_update(txo, wrb_cnt, copied, gso_segs, stopped);
        } else {
                txq->head = start;
                dev_kfree_skb_any(skb);
        }
        return NETDEV_TX_OK;
}

static int be_change_mtu(struct net_device *netdev, int new_mtu)
{
        struct be_adapter *adapter = netdev_priv(netdev);
        if (new_mtu < BE_MIN_MTU ||
                        new_mtu > (BE_MAX_JUMBO_FRAME_SIZE -
                                        (ETH_HLEN + ETH_FCS_LEN))) {
                dev_info(&adapter->pdev->dev,
                        "MTU must be between %d and %d bytes\n",
                        BE_MIN_MTU,
                        (BE_MAX_JUMBO_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN)));
                return -EINVAL;
        }
        dev_info(&adapter->pdev->dev, "MTU changed from %d to %d bytes\n",
                        netdev->mtu, new_mtu);
        netdev->mtu = new_mtu;
        return 0;
}

/*
 * A max of 64 (BE_NUM_VLANS_SUPPORTED) vlans can be configured in BE.
 * If the user configures more, place BE in vlan promiscuous mode.
 */
static int be_vid_config(struct be_adapter *adapter)
{
        u16 vids[BE_NUM_VLANS_SUPPORTED];
        u16 num = 0, i;
        int status = 0;

        /* No need to further configure vids if in promiscuous mode */
        if (adapter->promiscuous)
                return 0;

        if (adapter->vlans_added > be_max_vlans(adapter))
                goto set_vlan_promisc;

        /* Construct VLAN Table to give to HW */
        for (i = 0; i < VLAN_N_VID; i++)
                if (adapter->vlan_tag[i])
                        vids[num++] = cpu_to_le16(i);

        status = be_cmd_vlan_config(adapter, adapter->if_handle,
                                    vids, num, 1, 0);

        if (status) {
                /* Set to VLAN promisc mode as setting VLAN filter failed */
                if (status == MCC_ADDL_STS_INSUFFICIENT_RESOURCES)
                        goto set_vlan_promisc;
                dev_err(&adapter->pdev->dev,
                        "Setting HW VLAN filtering failed.\n");
        } else {
                if (adapter->flags & BE_FLAGS_VLAN_PROMISC) {
                        /* hw VLAN filtering re-enabled. */
                        status = be_cmd_rx_filter(adapter,
                                                  BE_FLAGS_VLAN_PROMISC, OFF);
                        if (!status) {
                                dev_info(&adapter->pdev->dev,
                                         "Disabling VLAN Promiscuous mode.\n");
                                adapter->flags &= ~BE_FLAGS_VLAN_PROMISC;
                                dev_info(&adapter->pdev->dev,
                                         "Re-Enabling HW VLAN filtering\n");
                        }
                }
        }

        return status;

set_vlan_promisc:
        dev_warn(&adapter->pdev->dev, "Exhausted VLAN HW filters.\n");

        status = be_cmd_rx_filter(adapter, BE_FLAGS_VLAN_PROMISC, ON);
        if (!status) {
                dev_info(&adapter->pdev->dev, "Enable VLAN Promiscuous mode\n");
                dev_info(&adapter->pdev->dev, "Disabling HW VLAN filtering\n");
                adapter->flags |= BE_FLAGS_VLAN_PROMISC;
        } else
                dev_err(&adapter->pdev->dev,
                        "Failed to enable VLAN Promiscuous mode.\n");
        return status;
}

static int be_vlan_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
{
        struct be_adapter *adapter = netdev_priv(netdev);
        int status = 0;


        /* Packets with VID 0 are always received by Lancer by default */
        if (lancer_chip(adapter) && vid == 0)
                goto ret;

        adapter->vlan_tag[vid] = 1;
        if (adapter->vlans_added <= (be_max_vlans(adapter) + 1))
                status = be_vid_config(adapter);

        if (!status)
                adapter->vlans_added++;
        else
                adapter->vlan_tag[vid] = 0;
ret:
        return status;
}

static int be_vlan_rem_vid(struct net_device *netdev, __be16 proto, u16 vid)
{
        struct be_adapter *adapter = netdev_priv(netdev);
        int status = 0;

        /* Packets with VID 0 are always received by Lancer by default */
        if (lancer_chip(adapter) && vid == 0)
                goto ret;

        adapter->vlan_tag[vid] = 0;
        if (adapter->vlans_added <= be_max_vlans(adapter))
                status = be_vid_config(adapter);

        if (!status)
                adapter->vlans_added--;
        else
                adapter->vlan_tag[vid] = 1;
ret:
        return status;
}

static void be_set_rx_mode(struct net_device *netdev)
{
        struct be_adapter *adapter = netdev_priv(netdev);
        int status;

        if (netdev->flags & IFF_PROMISC) {
                be_cmd_rx_filter(adapter, IFF_PROMISC, ON);
                adapter->promiscuous = true;
                goto done;
        }

        /* BE was previously in promiscuous mode; disable it */
        if (adapter->promiscuous) {
                adapter->promiscuous = false;
                be_cmd_rx_filter(adapter, IFF_PROMISC, OFF);

                if (adapter->vlans_added)
                        be_vid_config(adapter);
        }

        /* Enable multicast promisc if num configured exceeds what we support */
        if (netdev->flags & IFF_ALLMULTI ||
            netdev_mc_count(netdev) > be_max_mc(adapter)) {
                be_cmd_rx_filter(adapter, IFF_ALLMULTI, ON);
                goto done;
        }

        if (netdev_uc_count(netdev) != adapter->uc_macs) {
                struct netdev_hw_addr *ha;
                int i = 1; /* First slot is claimed by the Primary MAC */

                for (; adapter->uc_macs > 0; adapter->uc_macs--, i++) {
                        be_cmd_pmac_del(adapter, adapter->if_handle,
                                        adapter->pmac_id[i], 0);
                }

                if (netdev_uc_count(netdev) > be_max_uc(adapter)) {
                        be_cmd_rx_filter(adapter, IFF_PROMISC, ON);
                        adapter->promiscuous = true;
                        goto done;
                }

                netdev_for_each_uc_addr(ha, adapter->netdev) {
                        adapter->uc_macs++; /* First slot is for Primary MAC */
                        be_cmd_pmac_add(adapter, (u8 *)ha->addr,
                                        adapter->if_handle,
                                        &adapter->pmac_id[adapter->uc_macs], 0);
                }
        }

        status = be_cmd_rx_filter(adapter, IFF_MULTICAST, ON);

        /* Set to MCAST promisc mode if setting MULTICAST address fails */
        if (status) {
                dev_info(&adapter->pdev->dev, "Exhausted multicast HW filters.\n");
                dev_info(&adapter->pdev->dev, "Disabling HW multicast filtering.\n");
                be_cmd_rx_filter(adapter, IFF_ALLMULTI, ON);
        }
done:
        return;
}

static int be_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
{
        struct be_adapter *adapter = netdev_priv(netdev);
        struct be_vf_cfg *vf_cfg = &adapter->vf_cfg[vf];
        int status;

        if (!sriov_enabled(adapter))
                return -EPERM;

        if (!is_valid_ether_addr(mac) || vf >= adapter->num_vfs)
                return -EINVAL;

        if (BEx_chip(adapter)) {
                be_cmd_pmac_del(adapter, vf_cfg->if_handle, vf_cfg->pmac_id,
                                vf + 1);

                status = be_cmd_pmac_add(adapter, mac, vf_cfg->if_handle,
                                         &vf_cfg->pmac_id, vf + 1);
        } else {
                status = be_cmd_set_mac(adapter, mac, vf_cfg->if_handle,
                                        vf + 1);
        }

        if (status)
                dev_err(&adapter->pdev->dev, "MAC %pM set on VF %d Failed\n",
                                mac, vf);
        else
                memcpy(vf_cfg->mac_addr, mac, ETH_ALEN);

        return status;
}

static int be_get_vf_config(struct net_device *netdev, int vf,
                        struct ifla_vf_info *vi)
{
        struct be_adapter *adapter = netdev_priv(netdev);
        struct be_vf_cfg *vf_cfg = &adapter->vf_cfg[vf];

        if (!sriov_enabled(adapter))
                return -EPERM;

        if (vf >= adapter->num_vfs)
                return -EINVAL;

        vi->vf = vf;
        vi->tx_rate = vf_cfg->tx_rate;
        vi->vlan = vf_cfg->vlan_tag & VLAN_VID_MASK;
        vi->qos = vf_cfg->vlan_tag >> VLAN_PRIO_SHIFT;
        memcpy(&vi->mac, vf_cfg->mac_addr, ETH_ALEN);

        return 0;
}

static int be_set_vf_vlan(struct net_device *netdev,
                        int vf, u16 vlan, u8 qos)
{
        struct be_adapter *adapter = netdev_priv(netdev);
        struct be_vf_cfg *vf_cfg = &adapter->vf_cfg[vf];
        int status = 0;

        if (!sriov_enabled(adapter))
                return -EPERM;

        if (vf >= adapter->num_vfs || vlan > 4095 || qos > 7)
                return -EINVAL;

        if (vlan || qos) {
                vlan |= qos << VLAN_PRIO_SHIFT;
                if (vf_cfg->vlan_tag != vlan) {
                        /* If this is new value, program it. Else skip. */
                        vf_cfg->vlan_tag = vlan;
                        status = be_cmd_set_hsw_config(adapter, vlan, vf + 1,
                                                       vf_cfg->if_handle, 0);
                }
        } else {
                /* Reset Transparent Vlan Tagging. */
                vf_cfg->vlan_tag = 0;
                vlan = vf_cfg->def_vid;
                status = be_cmd_set_hsw_config(adapter, vlan, vf + 1,
                                               vf_cfg->if_handle, 0);
        }


        if (status)
                dev_info(&adapter->pdev->dev,
                                "VLAN %d config on VF %d failed\n", vlan, vf);
        return status;
}

static int be_set_vf_tx_rate(struct net_device *netdev,
                        int vf, int rate)
{
        struct be_adapter *adapter = netdev_priv(netdev);
        int status = 0;

        if (!sriov_enabled(adapter))
                return -EPERM;

        if (vf >= adapter->num_vfs)
                return -EINVAL;

        if (rate < 100 || rate > 10000) {
                dev_err(&adapter->pdev->dev,
                        "tx rate must be between 100 and 10000 Mbps\n");
                return -EINVAL;
        }

        if (lancer_chip(adapter))
                status = be_cmd_set_profile_config(adapter, rate / 10, vf + 1);
        else
                status = be_cmd_set_qos(adapter, rate / 10, vf + 1);

        if (status)
                dev_err(&adapter->pdev->dev,
                                "tx rate %d on VF %d failed\n", rate, vf);
        else
                adapter->vf_cfg[vf].tx_rate = rate;
        return status;
}

static void be_eqd_update(struct be_adapter *adapter, struct be_eq_obj *eqo)
{
        struct be_rx_stats *stats = rx_stats(&adapter->rx_obj[eqo->idx]);
        ulong now = jiffies;
        ulong delta = now - stats->rx_jiffies;
        u64 pkts;
        unsigned int start, eqd;

        if (!eqo->enable_aic) {
                eqd = eqo->eqd;
                goto modify_eqd;
        }

        if (eqo->idx >= adapter->num_rx_qs)
                return;

        stats = rx_stats(&adapter->rx_obj[eqo->idx]);

        /* Wrapped around */
        if (time_before(now, stats->rx_jiffies)) {
                stats->rx_jiffies = now;
                return;
        }

        /* Update once a second */
        if (delta < HZ)
                return;

        do {
                start = u64_stats_fetch_begin_bh(&stats->sync);
                pkts = stats->rx_pkts;
        } while (u64_stats_fetch_retry_bh(&stats->sync, start));

        stats->rx_pps = (unsigned long)(pkts - stats->rx_pkts_prev) / (delta / HZ);
        stats->rx_pkts_prev = pkts;
        stats->rx_jiffies = now;
        eqd = (stats->rx_pps / 110000) << 3;
        eqd = min(eqd, eqo->max_eqd);
        eqd = max(eqd, eqo->min_eqd);
        if (eqd < 10)
                eqd = 0;

modify_eqd:
        if (eqd != eqo->cur_eqd) {
                be_cmd_modify_eqd(adapter, eqo->q.id, eqd);
                eqo->cur_eqd = eqd;
        }
}

static void be_rx_stats_update(struct be_rx_obj *rxo,
                struct be_rx_compl_info *rxcp)
{
        struct be_rx_stats *stats = rx_stats(rxo);

        u64_stats_update_begin(&stats->sync);
        stats->rx_compl++;
        stats->rx_bytes += rxcp->pkt_size;
        stats->rx_pkts++;
        if (rxcp->pkt_type == BE_MULTICAST_PACKET)
                stats->rx_mcast_pkts++;
        if (rxcp->err)
                stats->rx_compl_err++;
        u64_stats_update_end(&stats->sync);
}

static inline bool csum_passed(struct be_rx_compl_info *rxcp)
{
        /* L4 checksum is not reliable for non TCP/UDP packets.
         * Also ignore ipcksm for ipv6 pkts */
        return (rxcp->tcpf || rxcp->udpf) && rxcp->l4_csum &&
                                (rxcp->ip_csum || rxcp->ipv6);
}

static struct be_rx_page_info *get_rx_page_info(struct be_rx_obj *rxo,
                                                u16 frag_idx)
{
        struct be_adapter *adapter = rxo->adapter;
        struct be_rx_page_info *rx_page_info;
        struct be_queue_info *rxq = &rxo->q;

        rx_page_info = &rxo->page_info_tbl[frag_idx];
        BUG_ON(!rx_page_info->page);

        if (rx_page_info->last_page_user) {
                dma_unmap_page(&adapter->pdev->dev,
                               dma_unmap_addr(rx_page_info, bus),
                               adapter->big_page_size, DMA_FROM_DEVICE);
                rx_page_info->last_page_user = false;
        }

        atomic_dec(&rxq->used);
        return rx_page_info;
}

/* Throwaway the data in the Rx completion */
static void be_rx_compl_discard(struct be_rx_obj *rxo,
                                struct be_rx_compl_info *rxcp)
{
        struct be_queue_info *rxq = &rxo->q;
        struct be_rx_page_info *page_info;
        u16 i, num_rcvd = rxcp->num_rcvd;

        for (i = 0; i < num_rcvd; i++) {
                page_info = get_rx_page_info(rxo, rxcp->rxq_idx);
                put_page(page_info->page);
                memset(page_info, 0, sizeof(*page_info));
                index_inc(&rxcp->rxq_idx, rxq->len);
        }
}

/*
 * skb_fill_rx_data forms a complete skb for an ether frame
 * indicated by rxcp.
 */
static void skb_fill_rx_data(struct be_rx_obj *rxo, struct sk_buff *skb,
                             struct be_rx_compl_info *rxcp)
{
        struct be_queue_info *rxq = &rxo->q;
        struct be_rx_page_info *page_info;
        u16 i, j;
        u16 hdr_len, curr_frag_len, remaining;
        u8 *start;

        page_info = get_rx_page_info(rxo, rxcp->rxq_idx);
        start = page_address(page_info->page) + page_info->page_offset;
        prefetch(start);

        /* Copy data in the first descriptor of this completion */
        curr_frag_len = min(rxcp->pkt_size, rx_frag_size);

        skb->len = curr_frag_len;
        if (curr_frag_len <= BE_HDR_LEN) { /* tiny packet */
                memcpy(skb->data, start, curr_frag_len);
                /* Complete packet has now been moved to data */
                put_page(page_info->page);
                skb->data_len = 0;
                skb->tail += curr_frag_len;
        } else {
                hdr_len = ETH_HLEN;
                memcpy(skb->data, start, hdr_len);
                skb_shinfo(skb)->nr_frags = 1;
                skb_frag_set_page(skb, 0, page_info->page);
                skb_shinfo(skb)->frags[0].page_offset =
                                        page_info->page_offset + hdr_len;
                skb_frag_size_set(&skb_shinfo(skb)->frags[0], curr_frag_len - hdr_len);
                skb->data_len = curr_frag_len - hdr_len;
                skb->truesize += rx_frag_size;
                skb->tail += hdr_len;
        }
        page_info->page = NULL;

        if (rxcp->pkt_size <= rx_frag_size) {
                BUG_ON(rxcp->num_rcvd != 1);
                return;
        }

        /* More frags present for this completion */
        index_inc(&rxcp->rxq_idx, rxq->len);
        remaining = rxcp->pkt_size - curr_frag_len;
        for (i = 1, j = 0; i < rxcp->num_rcvd; i++) {
                page_info = get_rx_page_info(rxo, rxcp->rxq_idx);
                curr_frag_len = min(remaining, rx_frag_size);

                /* Coalesce all frags from the same physical page in one slot */
                if (page_info->page_offset == 0) {
                        /* Fresh page */
                        j++;
                        skb_frag_set_page(skb, j, page_info->page);
                        skb_shinfo(skb)->frags[j].page_offset =
                                                        page_info->page_offset;
                        skb_frag_size_set(&skb_shinfo(skb)->frags[j], 0);
                        skb_shinfo(skb)->nr_frags++;
                } else {
                        put_page(page_info->page);
                }

                skb_frag_size_add(&skb_shinfo(skb)->frags[j], curr_frag_len);
                skb->len += curr_frag_len;
                skb->data_len += curr_frag_len;
                skb->truesize += rx_frag_size;
                remaining -= curr_frag_len;
                index_inc(&rxcp->rxq_idx, rxq->len);
                page_info->page = NULL;
        }
        BUG_ON(j > MAX_SKB_FRAGS);
}

/* Process the RX completion indicated by rxcp when GRO is disabled */
static void be_rx_compl_process(struct be_rx_obj *rxo,
                                struct be_rx_compl_info *rxcp)
{
        struct be_adapter *adapter = rxo->adapter;
        struct net_device *netdev = adapter->netdev;
        struct sk_buff *skb;

        skb = netdev_alloc_skb_ip_align(netdev, BE_RX_SKB_ALLOC_SIZE);
        if (unlikely(!skb)) {
                rx_stats(rxo)->rx_drops_no_skbs++;
                be_rx_compl_discard(rxo, rxcp);
                return;
        }

        skb_fill_rx_data(rxo, skb, rxcp);

        if (likely((netdev->features & NETIF_F_RXCSUM) && csum_passed(rxcp)))
                skb->ip_summed = CHECKSUM_UNNECESSARY;
        else
                skb_checksum_none_assert(skb);

        skb->protocol = eth_type_trans(skb, netdev);
        skb_record_rx_queue(skb, rxo - &adapter->rx_obj[0]);
        if (netdev->features & NETIF_F_RXHASH)
                skb->rxhash = rxcp->rss_hash;


        if (rxcp->vlanf)
                __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), rxcp->vlan_tag);

        netif_receive_skb(skb);
}

/* Process the RX completion indicated by rxcp when GRO is enabled */
static void be_rx_compl_process_gro(struct be_rx_obj *rxo,
                                    struct napi_struct *napi,
                                    struct be_rx_compl_info *rxcp)
{
        struct be_adapter *adapter = rxo->adapter;
        struct be_rx_page_info *page_info;
        struct sk_buff *skb = NULL;
        struct be_queue_info *rxq = &rxo->q;
        u16 remaining, curr_frag_len;
        u16 i, j;

        skb = napi_get_frags(napi);
        if (!skb) {
                be_rx_compl_discard(rxo, rxcp);
                return;
        }

        remaining = rxcp->pkt_size;
        for (i = 0, j = -1; i < rxcp->num_rcvd; i++) {
                page_info = get_rx_page_info(rxo, rxcp->rxq_idx);

                curr_frag_len = min(remaining, rx_frag_size);

                /* Coalesce all frags from the same physical page in one slot */
                if (i == 0 || page_info->page_offset == 0) {
                        /* First frag or Fresh page */
                        j++;
                        skb_frag_set_page(skb, j, page_info->page);
                        skb_shinfo(skb)->frags[j].page_offset =
                                                        page_info->page_offset;
                        skb_frag_size_set(&skb_shinfo(skb)->frags[j], 0);
                } else {
                        put_page(page_info->page);
                }
                skb_frag_size_add(&skb_shinfo(skb)->frags[j], curr_frag_len);
                skb->truesize += rx_frag_size;
                remaining -= curr_frag_len;
                index_inc(&rxcp->rxq_idx, rxq->len);
                memset(page_info, 0, sizeof(*page_info));
        }
        BUG_ON(j > MAX_SKB_FRAGS);

        skb_shinfo(skb)->nr_frags = j + 1;
        skb->len = rxcp->pkt_size;
        skb->data_len = rxcp->pkt_size;
        skb->ip_summed = CHECKSUM_UNNECESSARY;
        skb_record_rx_queue(skb, rxo - &adapter->rx_obj[0]);
        if (adapter->netdev->features & NETIF_F_RXHASH)
                skb->rxhash = rxcp->rss_hash;

        if (rxcp->vlanf)
                __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), rxcp->vlan_tag);

        napi_gro_frags(napi);
}

static void be_parse_rx_compl_v1(struct be_eth_rx_compl *compl,
                                 struct be_rx_compl_info *rxcp)
{
        rxcp->pkt_size =
                AMAP_GET_BITS(struct amap_eth_rx_compl_v1, pktsize, compl);
        rxcp->vlanf = AMAP_GET_BITS(struct amap_eth_rx_compl_v1, vtp, compl);
        rxcp->err = AMAP_GET_BITS(struct amap_eth_rx_compl_v1, err, compl);
        rxcp->tcpf = AMAP_GET_BITS(struct amap_eth_rx_compl_v1, tcpf, compl);
        rxcp->udpf = AMAP_GET_BITS(struct amap_eth_rx_compl_v1, udpf, compl);
        rxcp->ip_csum =
                AMAP_GET_BITS(struct amap_eth_rx_compl_v1, ipcksm, compl);
        rxcp->l4_csum =
                AMAP_GET_BITS(struct amap_eth_rx_compl_v1, l4_cksm, compl);
        rxcp->ipv6 =
                AMAP_GET_BITS(struct amap_eth_rx_compl_v1, ip_version, compl);
        rxcp->rxq_idx =
                AMAP_GET_BITS(struct amap_eth_rx_compl_v1, fragndx, compl);
        rxcp->num_rcvd =
                AMAP_GET_BITS(struct amap_eth_rx_compl_v1, numfrags, compl);
        rxcp->pkt_type =
                AMAP_GET_BITS(struct amap_eth_rx_compl_v1, cast_enc, compl);
        rxcp->rss_hash =
                AMAP_GET_BITS(struct amap_eth_rx_compl_v1, rsshash, compl);
        if (rxcp->vlanf) {
                rxcp->vtm = AMAP_GET_BITS(struct amap_eth_rx_compl_v1, vtm,
                                          compl);
                rxcp->vlan_tag = AMAP_GET_BITS(struct amap_eth_rx_compl_v1, vlan_tag,
                                               compl);
        }
        rxcp->port = AMAP_GET_BITS(struct amap_eth_rx_compl_v1, port, compl);
}

static void be_parse_rx_compl_v0(struct be_eth_rx_compl *compl,
                                 struct be_rx_compl_info *rxcp)
{
        rxcp->pkt_size =
                AMAP_GET_BITS(struct amap_eth_rx_compl_v0, pktsize, compl);
        rxcp->vlanf = AMAP_GET_BITS(struct amap_eth_rx_compl_v0, vtp, compl);
        rxcp->err = AMAP_GET_BITS(struct amap_eth_rx_compl_v0, err, compl);
        rxcp->tcpf = AMAP_GET_BITS(struct amap_eth_rx_compl_v0, tcpf, compl);
        rxcp->udpf = AMAP_GET_BITS(struct amap_eth_rx_compl_v0, udpf, compl);
        rxcp->ip_csum =
                AMAP_GET_BITS(struct amap_eth_rx_compl_v0, ipcksm, compl);
        rxcp->l4_csum =
                AMAP_GET_BITS(struct amap_eth_rx_compl_v0, l4_cksm, compl);
        rxcp->ipv6 =
                AMAP_GET_BITS(struct amap_eth_rx_compl_v0, ip_version, compl);
        rxcp->rxq_idx =
                AMAP_GET_BITS(struct amap_eth_rx_compl_v0, fragndx, compl);
        rxcp->num_rcvd =
                AMAP_GET_BITS(struct amap_eth_rx_compl_v0, numfrags, compl);
        rxcp->pkt_type =
                AMAP_GET_BITS(struct amap_eth_rx_compl_v0, cast_enc, compl);
        rxcp->rss_hash =
                AMAP_GET_BITS(struct amap_eth_rx_compl_v0, rsshash, compl);
        if (rxcp->vlanf) {
                rxcp->vtm = AMAP_GET_BITS(struct amap_eth_rx_compl_v0, vtm,
                                          compl);
                rxcp->vlan_tag = AMAP_GET_BITS(struct amap_eth_rx_compl_v0, vlan_tag,
                                               compl);
        }
        rxcp->port = AMAP_GET_BITS(struct amap_eth_rx_compl_v0, port, compl);
        rxcp->ip_frag = AMAP_GET_BITS(struct amap_eth_rx_compl_v0,
                                      ip_frag, compl);
}

static struct be_rx_compl_info *be_rx_compl_get(struct be_rx_obj *rxo)
{
        struct be_eth_rx_compl *compl = queue_tail_node(&rxo->cq);
        struct be_rx_compl_info *rxcp = &rxo->rxcp;
        struct be_adapter *adapter = rxo->adapter;

        /* For checking the valid bit it is Ok to use either definition as the
         * valid bit is at the same position in both v0 and v1 Rx compl */
        if (compl->dw[offsetof(struct amap_eth_rx_compl_v1, valid) / 32] == 0)
                return NULL;

        rmb();
        be_dws_le_to_cpu(compl, sizeof(*compl));

        if (adapter->be3_native)
                be_parse_rx_compl_v1(compl, rxcp);
        else
                be_parse_rx_compl_v0(compl, rxcp);

        if (rxcp->ip_frag)
                rxcp->l4_csum = 0;

        if (rxcp->vlanf) {
                /* vlanf could be wrongly set in some cards.
                 * ignore if vtm is not set */
                if ((adapter->function_mode & FLEX10_MODE) && !rxcp->vtm)
                        rxcp->vlanf = 0;

                if (!lancer_chip(adapter))
                        rxcp->vlan_tag = swab16(rxcp->vlan_tag);

                if (adapter->pvid == (rxcp->vlan_tag & VLAN_VID_MASK) &&
                    !adapter->vlan_tag[rxcp->vlan_tag])
                        rxcp->vlanf = 0;
        }

        /* As the compl has been parsed, reset it; we wont touch it again */
        compl->dw[offsetof(struct amap_eth_rx_compl_v1, valid) / 32] = 0;

        queue_tail_inc(&rxo->cq);
        return rxcp;
}

static inline struct page *be_alloc_pages(u32 size, gfp_t gfp)
{
        u32 order = get_order(size);

        if (order > 0)
                gfp |= __GFP_COMP;
        return  alloc_pages(gfp, order);
}

/*
 * Allocate a page, split it to fragments of size rx_frag_size and post as
 * receive buffers to BE
 */
static void be_post_rx_frags(struct be_rx_obj *rxo, gfp_t gfp)
{
        struct be_adapter *adapter = rxo->adapter;
        struct be_rx_page_info *page_info = NULL, *prev_page_info = NULL;
        struct be_queue_info *rxq = &rxo->q;
        struct page *pagep = NULL;
        struct be_eth_rx_d *rxd;
        u64 page_dmaaddr = 0, frag_dmaaddr;
        u32 posted, page_offset = 0;

        page_info = &rxo->page_info_tbl[rxq->head];
        for (posted = 0; posted < MAX_RX_POST && !page_info->page; posted++) {
                if (!pagep) {
                        pagep = be_alloc_pages(adapter->big_page_size, gfp);
                        if (unlikely(!pagep)) {
                                rx_stats(rxo)->rx_post_fail++;
                                break;
                        }
                        page_dmaaddr = dma_map_page(&adapter->pdev->dev, pagep,
                                                    0, adapter->big_page_size,
                                                    DMA_FROM_DEVICE);
                        page_info->page_offset = 0;
                } else {
                        get_page(pagep);
                        page_info->page_offset = page_offset + rx_frag_size;
                }
                page_offset = page_info->page_offset;
                page_info->page = pagep;
                dma_unmap_addr_set(page_info, bus, page_dmaaddr);
                frag_dmaaddr = page_dmaaddr + page_info->page_offset;

                rxd = queue_head_node(rxq);
                rxd->fragpa_lo = cpu_to_le32(frag_dmaaddr & 0xFFFFFFFF);
                rxd->fragpa_hi = cpu_to_le32(upper_32_bits(frag_dmaaddr));

                /* Any space left in the current big page for another frag? */
                if ((page_offset + rx_frag_size + rx_frag_size) >
                                        adapter->big_page_size) {
                        pagep = NULL;
                        page_info->last_page_user = true;
                }

                prev_page_info = page_info;
                queue_head_inc(rxq);
                page_info = &rxo->page_info_tbl[rxq->head];
        }
        if (pagep)
                prev_page_info->last_page_user = true;

        if (posted) {
                atomic_add(posted, &rxq->used);
                be_rxq_notify(adapter, rxq->id, posted);
        } else if (atomic_read(&rxq->used) == 0) {
                /* Let be_worker replenish when memory is available */
                rxo->rx_post_starved = true;
        }
}

static struct be_eth_tx_compl *be_tx_compl_get(struct be_queue_info *tx_cq)
{
        struct be_eth_tx_compl *txcp = queue_tail_node(tx_cq);

        if (txcp->dw[offsetof(struct amap_eth_tx_compl, valid) / 32] == 0)
                return NULL;

        rmb();
        be_dws_le_to_cpu(txcp, sizeof(*txcp));

        txcp->dw[offsetof(struct amap_eth_tx_compl, valid) / 32] = 0;

        queue_tail_inc(tx_cq);
        return txcp;
}

static u16 be_tx_compl_process(struct be_adapter *adapter,
                struct be_tx_obj *txo, u16 last_index)
{
        struct be_queue_info *txq = &txo->q;
        struct be_eth_wrb *wrb;
        struct sk_buff **sent_skbs = txo->sent_skb_list;
        struct sk_buff *sent_skb;
        u16 cur_index, num_wrbs = 1; /* account for hdr wrb */
        bool unmap_skb_hdr = true;

        sent_skb = sent_skbs[txq->tail];
        BUG_ON(!sent_skb);
        sent_skbs[txq->tail] = NULL;

        /* skip header wrb */
        queue_tail_inc(txq);

        do {
                cur_index = txq->tail;
                wrb = queue_tail_node(txq);
                unmap_tx_frag(&adapter->pdev->dev, wrb,
                              (unmap_skb_hdr && skb_headlen(sent_skb)));
                unmap_skb_hdr = false;

                num_wrbs++;
                queue_tail_inc(txq);
        } while (cur_index != last_index);

        kfree_skb(sent_skb);
        return num_wrbs;
}

/* Return the number of events in the event queue */
static inline int events_get(struct be_eq_obj *eqo)
{
        struct be_eq_entry *eqe;
        int num = 0;

        do {
                eqe = queue_tail_node(&eqo->q);
                if (eqe->evt == 0)
                        break;

                rmb();
                eqe->evt = 0;
                num++;
                queue_tail_inc(&eqo->q);
        } while (true);

        return num;
}

/* Leaves the EQ is disarmed state */
static void be_eq_clean(struct be_eq_obj *eqo)
{
        int num = events_get(eqo);

        be_eq_notify(eqo->adapter, eqo->q.id, false, true, num);
}

static void be_rx_cq_clean(struct be_rx_obj *rxo)
{
        struct be_rx_page_info *page_info;
        struct be_queue_info *rxq = &rxo->q;
        struct be_queue_info *rx_cq = &rxo->cq;
        struct be_rx_compl_info *rxcp;
        struct be_adapter *adapter = rxo->adapter;
        int flush_wait = 0;
        u16 tail;

        /* Consume pending rx completions.
         * Wait for the flush completion (identified by zero num_rcvd)
         * to arrive. Notify CQ even when there are no more CQ entries
         * for HW to flush partially coalesced CQ entries.
         * In Lancer, there is no need to wait for flush compl.
         */
        for (;;) {
                rxcp = be_rx_compl_get(rxo);
                if (rxcp == NULL) {
                        if (lancer_chip(adapter))
                                break;

                        if (flush_wait++ > 10 || be_hw_error(adapter)) {
                                dev_warn(&adapter->pdev->dev,
                                         "did not receive flush compl\n");
                                break;
                        }
                        be_cq_notify(adapter, rx_cq->id, true, 0);
                        mdelay(1);
                } else {
                        be_rx_compl_discard(rxo, rxcp);
                        be_cq_notify(adapter, rx_cq->id, false, 1);
                        if (rxcp->num_rcvd == 0)
                                break;
                }
        }

        /* After cleanup, leave the CQ in unarmed state */
        be_cq_notify(adapter, rx_cq->id, false, 0);

        /* Then free posted rx buffers that were not used */
        tail = (rxq->head + rxq->len - atomic_read(&rxq->used)) % rxq->len;
        for (; atomic_read(&rxq->used) > 0; index_inc(&tail, rxq->len)) {
                page_info = get_rx_page_info(rxo, tail);
                put_page(page_info->page);
                memset(page_info, 0, sizeof(*page_info));
        }
        BUG_ON(atomic_read(&rxq->used));
        rxq->tail = rxq->head = 0;
}

static void be_tx_compl_clean(struct be_adapter *adapter)
{
        struct be_tx_obj *txo;
        struct be_queue_info *txq;
        struct be_eth_tx_compl *txcp;
        u16 end_idx, cmpl = 0, timeo = 0, num_wrbs = 0;
        struct sk_buff *sent_skb;
        bool dummy_wrb;
        int i, pending_txqs;

        /* Wait for a max of 200ms for all the tx-completions to arrive. */
        do {
                pending_txqs = adapter->num_tx_qs;

                for_all_tx_queues(adapter, txo, i) {
                        txq = &txo->q;
                        while ((txcp = be_tx_compl_get(&txo->cq))) {
                                end_idx =
                                        AMAP_GET_BITS(struct amap_eth_tx_compl,
                                                      wrb_index, txcp);
                                num_wrbs += be_tx_compl_process(adapter, txo,
                                                                end_idx);
                                cmpl++;
                        }
                        if (cmpl) {
                                be_cq_notify(adapter, txo->cq.id, false, cmpl);
                                atomic_sub(num_wrbs, &txq->used);
                                cmpl = 0;
                                num_wrbs = 0;
                        }
                        if (atomic_read(&txq->used) == 0)
                                pending_txqs--;
                }

                if (pending_txqs == 0 || ++timeo > 200)
                        break;

                mdelay(1);
        } while (true);

        for_all_tx_queues(adapter, txo, i) {
                txq = &txo->q;
                if (atomic_read(&txq->used))
                        dev_err(&adapter->pdev->dev, "%d pending tx-compls\n",
                                atomic_read(&txq->used));

                /* free posted tx for which compls will never arrive */
                while (atomic_read(&txq->used)) {
                        sent_skb = txo->sent_skb_list[txq->tail];
                        end_idx = txq->tail;
                        num_wrbs = wrb_cnt_for_skb(adapter, sent_skb,
                                                   &dummy_wrb);
                        index_adv(&end_idx, num_wrbs - 1, txq->len);
                        num_wrbs = be_tx_compl_process(adapter, txo, end_idx);
                        atomic_sub(num_wrbs, &txq->used);
                }
        }
}

static void be_evt_queues_destroy(struct be_adapter *adapter)
{
        struct be_eq_obj *eqo;
        int i;

        for_all_evt_queues(adapter, eqo, i) {
                if (eqo->q.created) {
                        be_eq_clean(eqo);
                        be_cmd_q_destroy(adapter, &eqo->q, QTYPE_EQ);
                        netif_napi_del(&eqo->napi);
                }
                be_queue_free(adapter, &eqo->q);
        }
}

static int be_evt_queues_create(struct be_adapter *adapter)
{
        struct be_queue_info *eq;
        struct be_eq_obj *eqo;
        int i, rc;

        adapter->num_evt_qs = min_t(u16, num_irqs(adapter),
                                    adapter->cfg_num_qs);

        for_all_evt_queues(adapter, eqo, i) {
                netif_napi_add(adapter->netdev, &eqo->napi, be_poll,
                               BE_NAPI_WEIGHT);
                eqo->adapter = adapter;
                eqo->tx_budget = BE_TX_BUDGET;
                eqo->idx = i;
                eqo->max_eqd = BE_MAX_EQD;
                eqo->enable_aic = true;

                eq = &eqo->q;
                rc = be_queue_alloc(adapter, eq, EVNT_Q_LEN,
                                        sizeof(struct be_eq_entry));
                if (rc)
                        return rc;

                rc = be_cmd_eq_create(adapter, eqo);
                if (rc)
                        return rc;
        }
        return 0;
}

static void be_mcc_queues_destroy(struct be_adapter *adapter)
{
        struct be_queue_info *q;

        q = &adapter->mcc_obj.q;
        if (q->created)
                be_cmd_q_destroy(adapter, q, QTYPE_MCCQ);
        be_queue_free(adapter, q);

        q = &adapter->mcc_obj.cq;
        if (q->created)
                be_cmd_q_destroy(adapter, q, QTYPE_CQ);
        be_queue_free(adapter, q);
}

/* Must be called only after TX qs are created as MCC shares TX EQ */
static int be_mcc_queues_create(struct be_adapter *adapter)
{
        struct be_queue_info *q, *cq;

        cq = &adapter->mcc_obj.cq;
        if (be_queue_alloc(adapter, cq, MCC_CQ_LEN,
                        sizeof(struct be_mcc_compl)))
                goto err;

        /* Use the default EQ for MCC completions */
        if (be_cmd_cq_create(adapter, cq, &mcc_eqo(adapter)->q, true, 0))
                goto mcc_cq_free;

        q = &adapter->mcc_obj.q;
        if (be_queue_alloc(adapter, q, MCC_Q_LEN, sizeof(struct be_mcc_wrb)))
                goto mcc_cq_destroy;

        if (be_cmd_mccq_create(adapter, q, cq))
                goto mcc_q_free;

        return 0;

mcc_q_free:
        be_queue_free(adapter, q);
mcc_cq_destroy:
        be_cmd_q_destroy(adapter, cq, QTYPE_CQ);
mcc_cq_free:
        be_queue_free(adapter, cq);
err:
        return -1;
}

static void be_tx_queues_destroy(struct be_adapter *adapter)
{
        struct be_queue_info *q;
        struct be_tx_obj *txo;
        u8 i;

        for_all_tx_queues(adapter, txo, i) {
                q = &txo->q;
                if (q->created)
                        be_cmd_q_destroy(adapter, q, QTYPE_TXQ);
                be_queue_free(adapter, q);

                q = &txo->cq;
                if (q->created)
                        be_cmd_q_destroy(adapter, q, QTYPE_CQ);
                be_queue_free(adapter, q);
        }
}

static int be_tx_qs_create(struct be_adapter *adapter)
{
        struct be_queue_info *cq, *eq;
        struct be_tx_obj *txo;
        int status, i;

        adapter->num_tx_qs = min(adapter->num_evt_qs, be_max_txqs(adapter));

        for_all_tx_queues(adapter, txo, i) {
                cq = &txo->cq;
                status = be_queue_alloc(adapter, cq, TX_CQ_LEN,
                                        sizeof(struct be_eth_tx_compl));
                if (status)
                        return status;

                /* If num_evt_qs is less than num_tx_qs, then more than
                 * one txq share an eq
                 */
                eq = &adapter->eq_obj[i % adapter->num_evt_qs].q;
                status = be_cmd_cq_create(adapter, cq, eq, false, 3);
                if (status)
                        return status;

                status = be_queue_alloc(adapter, &txo->q, TX_Q_LEN,
                                        sizeof(struct be_eth_wrb));
                if (status)
                        return status;

                status = be_cmd_txq_create(adapter, txo);
                if (status)
                        return status;
        }

        dev_info(&adapter->pdev->dev, "created %d TX queue(s)\n",
                 adapter->num_tx_qs);
        return 0;
}

static void be_rx_cqs_destroy(struct be_adapter *adapter)
{
        struct be_queue_info *q;
        struct be_rx_obj *rxo;
        int i;

        for_all_rx_queues(adapter, rxo, i) {
                q = &rxo->cq;
                if (q->created)
                        be_cmd_q_destroy(adapter, q, QTYPE_CQ);
                be_queue_free(adapter, q);
        }
}

static int be_rx_cqs_create(struct be_adapter *adapter)
{
        struct be_queue_info *eq, *cq;
        struct be_rx_obj *rxo;
        int rc, i;

        /* We can create as many RSS rings as there are EQs. */
        adapter->num_rx_qs = adapter->num_evt_qs;

        /* We'll use RSS only if atleast 2 RSS rings are supported.
         * When RSS is used, we'll need a default RXQ for non-IP traffic.
         */
        if (adapter->num_rx_qs > 1)
                adapter->num_rx_qs++;

        adapter->big_page_size = (1 << get_order(rx_frag_size)) * PAGE_SIZE;
        for_all_rx_queues(adapter, rxo, i) {
                rxo->adapter = adapter;
                cq = &rxo->cq;
                rc = be_queue_alloc(adapter, cq, RX_CQ_LEN,
                                sizeof(struct be_eth_rx_compl));
                if (rc)
                        return rc;

                eq = &adapter->eq_obj[i % adapter->num_evt_qs].q;
                rc = be_cmd_cq_create(adapter, cq, eq, false, 3);
                if (rc)
                        return rc;
        }

        dev_info(&adapter->pdev->dev,
                 "created %d RSS queue(s) and 1 default RX queue\n",
                 adapter->num_rx_qs - 1);
        return 0;
}

static irqreturn_t be_intx(int irq, void *dev)
{
        struct be_eq_obj *eqo = dev;
        struct be_adapter *adapter = eqo->adapter;
        int num_evts = 0;

        /* IRQ is not expected when NAPI is scheduled as the EQ
         * will not be armed.
         * But, this can happen on Lancer INTx where it takes
         * a while to de-assert INTx or in BE2 where occasionaly
         * an interrupt may be raised even when EQ is unarmed.
         * If NAPI is already scheduled, then counting & notifying
         * events will orphan them.
         */
        if (napi_schedule_prep(&eqo->napi)) {
                num_evts = events_get(eqo);
                __napi_schedule(&eqo->napi);
                if (num_evts)
                        eqo->spurious_intr = 0;
        }
        be_eq_notify(adapter, eqo->q.id, false, true, num_evts);

        /* Return IRQ_HANDLED only for the the first spurious intr
         * after a valid intr to stop the kernel from branding
         * this irq as a bad one!
         */
        if (num_evts || eqo->spurious_intr++ == 0)
                return IRQ_HANDLED;
        else
                return IRQ_NONE;
}

static irqreturn_t be_msix(int irq, void *dev)
{
        struct be_eq_obj *eqo = dev;

        be_eq_notify(eqo->adapter, eqo->q.id, false, true, 0);
        napi_schedule(&eqo->napi);
        return IRQ_HANDLED;
}

static inline bool do_gro(struct be_rx_compl_info *rxcp)
{
        return (rxcp->tcpf && !rxcp->err && rxcp->l4_csum) ? true : false;
}

static int be_process_rx(struct be_rx_obj *rxo, struct napi_struct *napi,
                        int budget)
{
        struct be_adapter *adapter = rxo->adapter;
        struct be_queue_info *rx_cq = &rxo->cq;
        struct be_rx_compl_info *rxcp;
        u32 work_done;

        for (work_done = 0; work_done < budget; work_done++) {
                rxcp = be_rx_compl_get(rxo);
                if (!rxcp)
                        break;

                /* Is it a flush compl that has no data */
                if (unlikely(rxcp->num_rcvd == 0))
                        goto loop_continue;

                /* Discard compl with partial DMA Lancer B0 */
                if (unlikely(!rxcp->pkt_size)) {
                        be_rx_compl_discard(rxo, rxcp);
                        goto loop_continue;
                }

                /* On BE drop pkts that arrive due to imperfect filtering in
                 * promiscuous mode on some skews
                 */
                if (unlikely(rxcp->port != adapter->port_num &&
                                !lancer_chip(adapter))) {
                        be_rx_compl_discard(rxo, rxcp);
                        goto loop_continue;
                }

                if (do_gro(rxcp))
                        be_rx_compl_process_gro(rxo, napi, rxcp);
                else
                        be_rx_compl_process(rxo, rxcp);
loop_continue:
                be_rx_stats_update(rxo, rxcp);
        }

        if (work_done) {
                be_cq_notify(adapter, rx_cq->id, true, work_done);

                if (atomic_read(&rxo->q.used) < RX_FRAGS_REFILL_WM)
                        be_post_rx_frags(rxo, GFP_ATOMIC);
        }

        return work_done;
}

static bool be_process_tx(struct be_adapter *adapter, struct be_tx_obj *txo,
                          int budget, int idx)
{
        struct be_eth_tx_compl *txcp;
        int num_wrbs = 0, work_done;

        for (work_done = 0; work_done < budget; work_done++) {
                txcp = be_tx_compl_get(&txo->cq);
                if (!txcp)
                        break;
                num_wrbs += be_tx_compl_process(adapter, txo,
                                AMAP_GET_BITS(struct amap_eth_tx_compl,
                                        wrb_index, txcp));
        }

        if (work_done) {
                be_cq_notify(adapter, txo->cq.id, true, work_done);
                atomic_sub(num_wrbs, &txo->q.used);

                /* As Tx wrbs have been freed up, wake up netdev queue
                 * if it was stopped due to lack of tx wrbs.  */
                if (__netif_subqueue_stopped(adapter->netdev, idx) &&
                        atomic_read(&txo->q.used) < txo->q.len / 2) {
                        netif_wake_subqueue(adapter->netdev, idx);
                }

                u64_stats_update_begin(&tx_stats(txo)->sync_compl);
                tx_stats(txo)->tx_compl += work_done;
                u64_stats_update_end(&tx_stats(txo)->sync_compl);
        }
        return (work_done < budget); /* Done */
}

int be_poll(struct napi_struct *napi, int budget)
{
        struct be_eq_obj *eqo = container_of(napi, struct be_eq_obj, napi);
        struct be_adapter *adapter = eqo->adapter;
        int max_work = 0, work, i, num_evts;
        bool tx_done;

        num_evts = events_get(eqo);

        /* Process all TXQs serviced by this EQ */
        for (i = eqo->idx; i < adapter->num_tx_qs; i += adapter->num_evt_qs) {
                tx_done = be_process_tx(adapter, &adapter->tx_obj[i],
                                        eqo->tx_budget, i);
                if (!tx_done)
                        max_work = budget;
        }

        /* This loop will iterate twice for EQ0 in which
         * completions of the last RXQ (default one) are also processed
         * For other EQs the loop iterates only once
         */
        for (i = eqo->idx; i < adapter->num_rx_qs; i += adapter->num_evt_qs) {
                work = be_process_rx(&adapter->rx_obj[i], napi, budget);
                max_work = max(work, max_work);
        }

        if (is_mcc_eqo(eqo))
                be_process_mcc(adapter);

        if (max_work < budget) {
                napi_complete(napi);
                be_eq_notify(adapter, eqo->q.id, true, false, num_evts);
        } else {
                /* As we'll continue in polling mode, count and clear events */
                be_eq_notify(adapter, eqo->q.id, false, false, num_evts);
        }
        return max_work;
}

void be_detect_error(struct be_adapter *adapter)
{
        u32 ue_lo = 0, ue_hi = 0, ue_lo_mask = 0, ue_hi_mask = 0;
        u32 sliport_status = 0, sliport_err1 = 0, sliport_err2 = 0;
        u32 i;

        if (be_hw_error(adapter))
                return;

        if (lancer_chip(adapter)) {
                sliport_status = ioread32(adapter->db + SLIPORT_STATUS_OFFSET);
                if (sliport_status & SLIPORT_STATUS_ERR_MASK) {
                        sliport_err1 = ioread32(adapter->db +
                                        SLIPORT_ERROR1_OFFSET);
                        sliport_err2 = ioread32(adapter->db +
                                        SLIPORT_ERROR2_OFFSET);
                }
        } else {
                pci_read_config_dword(adapter->pdev,
                                PCICFG_UE_STATUS_LOW, &ue_lo);
                pci_read_config_dword(adapter->pdev,
                                PCICFG_UE_STATUS_HIGH, &ue_hi);
                pci_read_config_dword(adapter->pdev,
                                PCICFG_UE_STATUS_LOW_MASK, &ue_lo_mask);
                pci_read_config_dword(adapter->pdev,
                                PCICFG_UE_STATUS_HI_MASK, &ue_hi_mask);

                ue_lo = (ue_lo & ~ue_lo_mask);
                ue_hi = (ue_hi & ~ue_hi_mask);
        }

        /* On certain platforms BE hardware can indicate spurious UEs.
         * Allow the h/w to stop working completely in case of a real UE.
         * Hence not setting the hw_error for UE detection.
         */
        if (sliport_status & SLIPORT_STATUS_ERR_MASK) {
                adapter->hw_error = true;
                dev_err(&adapter->pdev->dev,
                        "Error detected in the card\n");
        }

        if (sliport_status & SLIPORT_STATUS_ERR_MASK) {
                dev_err(&adapter->pdev->dev,
                        "ERR: sliport status 0x%x\n", sliport_status);
                dev_err(&adapter->pdev->dev,
                        "ERR: sliport error1 0x%x\n", sliport_err1);
                dev_err(&adapter->pdev->dev,
                        "ERR: sliport error2 0x%x\n", sliport_err2);
        }

        if (ue_lo) {
                for (i = 0; ue_lo; ue_lo >>= 1, i++) {
                        if (ue_lo & 1)
                                dev_err(&adapter->pdev->dev,
                                "UE: %s bit set\n", ue_status_low_desc[i]);
                }
        }

        if (ue_hi) {
                for (i = 0; ue_hi; ue_hi >>= 1, i++) {
                        if (ue_hi & 1)
                                dev_err(&adapter->pdev->dev,
                                "UE: %s bit set\n", ue_status_hi_desc[i]);
                }
        }

}

static void be_msix_disable(struct be_adapter *adapter)
{
        if (msix_enabled(adapter)) {
                pci_disable_msix(adapter->pdev);
                adapter->num_msix_vec = 0;
                adapter->num_msix_roce_vec = 0;
        }
}

static int be_msix_enable(struct be_adapter *adapter)
{
        int i, status, num_vec;
        struct device *dev = &adapter->pdev->dev;

        /* If RoCE is supported, program the max number of NIC vectors that
         * may be configured via set-channels, along with vectors needed for
         * RoCe. Else, just program the number we'll use initially.
         */
        if (be_roce_supported(adapter))
                num_vec = min_t(int, 2 * be_max_eqs(adapter),
                                2 * num_online_cpus());
        else
                num_vec = adapter->cfg_num_qs;

        for (i = 0; i < num_vec; i++)
                adapter->msix_entries[i].entry = i;

        status = pci_enable_msix(adapter->pdev, adapter->msix_entries, num_vec);
        if (status == 0) {
                goto done;
        } else if (status >= MIN_MSIX_VECTORS) {
                num_vec = status;
                status = pci_enable_msix(adapter->pdev, adapter->msix_entries,
                                         num_vec);
                if (!status)
                        goto done;
        }

        dev_warn(dev, "MSIx enable failed\n");

        /* INTx is not supported in VFs, so fail probe if enable_msix fails */
        if (!be_physfn(adapter))
                return status;
        return 0;
done:
        if (be_roce_supported(adapter) && num_vec > MIN_MSIX_VECTORS) {
                adapter->num_msix_roce_vec = num_vec / 2;
                dev_info(dev, "enabled %d MSI-x vector(s) for RoCE\n",
                         adapter->num_msix_roce_vec);
        }

        adapter->num_msix_vec = num_vec - adapter->num_msix_roce_vec;

        dev_info(dev, "enabled %d MSI-x vector(s) for NIC\n",
                 adapter->num_msix_vec);
        return 0;
}

static inline int be_msix_vec_get(struct be_adapter *adapter,
                                struct be_eq_obj *eqo)
{
        return adapter->msix_entries[eqo->msix_idx].vector;
}

static int be_msix_register(struct be_adapter *adapter)
{
        struct net_device *netdev = adapter->netdev;
        struct be_eq_obj *eqo;
        int status, i, vec;

        for_all_evt_queues(adapter, eqo, i) {
                sprintf(eqo->desc, "%s-q%d", netdev->name, i);
                vec = be_msix_vec_get(adapter, eqo);
                status = request_irq(vec, be_msix, 0, eqo->desc, eqo);
                if (status)
                        goto err_msix;
        }

        return 0;
err_msix:
        for (i--, eqo = &adapter->eq_obj[i]; i >= 0; i--, eqo--)
                free_irq(be_msix_vec_get(adapter, eqo), eqo);
        dev_warn(&adapter->pdev->dev, "MSIX Request IRQ failed - err %d\n",
                status);
        be_msix_disable(adapter);
        return status;
}

static int be_irq_register(struct be_adapter *adapter)
{
        struct net_device *netdev = adapter->netdev;
        int status;

        if (msix_enabled(adapter)) {
                status = be_msix_register(adapter);
                if (status == 0)
                        goto done;
                /* INTx is not supported for VF */
                if (!be_physfn(adapter))
                        return status;
        }

        /* INTx: only the first EQ is used */
        netdev->irq = adapter->pdev->irq;
        status = request_irq(netdev->irq, be_intx, IRQF_SHARED, netdev->name,
                             &adapter->eq_obj[0]);
        if (status) {
                dev_err(&adapter->pdev->dev,
                        "INTx request IRQ failed - err %d\n", status);
                return status;
        }
done:
        adapter->isr_registered = true;
        return 0;
}

static void be_irq_unregister(struct be_adapter *adapter)
{
        struct net_device *netdev = adapter->netdev;
        struct be_eq_obj *eqo;
        int i;

        if (!adapter->isr_registered)
                return;

        /* INTx */
        if (!msix_enabled(adapter)) {
                free_irq(netdev->irq, &adapter->eq_obj[0]);
                goto done;
        }

        /* MSIx */
        for_all_evt_queues(adapter, eqo, i)
                free_irq(be_msix_vec_get(adapter, eqo), eqo);

done:
        adapter->isr_registered = false;
}

static void be_rx_qs_destroy(struct be_adapter *adapter)
{
        struct be_queue_info *q;
        struct be_rx_obj *rxo;
        int i;

        for_all_rx_queues(adapter, rxo, i) {
                q = &rxo->q;
                if (q->created) {
                        be_cmd_rxq_destroy(adapter, q);
                        be_rx_cq_clean(rxo);
                }
                be_queue_free(adapter, q);
        }
}

static int be_close(struct net_device *netdev)
{
        struct be_adapter *adapter = netdev_priv(netdev);
        struct be_eq_obj *eqo;
        int i;

        be_roce_dev_close(adapter);

        if (adapter->flags & BE_FLAGS_NAPI_ENABLED) {
                for_all_evt_queues(adapter, eqo, i)
                        napi_disable(&eqo->napi);
                adapter->flags &= ~BE_FLAGS_NAPI_ENABLED;
        }

        be_async_mcc_disable(adapter);

        /* Wait for all pending tx completions to arrive so that
         * all tx skbs are freed.
         */
        netif_tx_disable(netdev);
        be_tx_compl_clean(adapter);

        be_rx_qs_destroy(adapter);

        for_all_evt_queues(adapter, eqo, i) {
                if (msix_enabled(adapter))
                        synchronize_irq(be_msix_vec_get(adapter, eqo));
                else
                        synchronize_irq(netdev->irq);
                be_eq_clean(eqo);
        }

        be_irq_unregister(adapter);

        return 0;
}

static int be_rx_qs_create(struct be_adapter *adapter)
{
        struct be_rx_obj *rxo;
        int rc, i, j;
        u8 rsstable[128];

        for_all_rx_queues(adapter, rxo, i) {
                rc = be_queue_alloc(adapter, &rxo->q, RX_Q_LEN,
                                    sizeof(struct be_eth_rx_d));
                if (rc)
                        return rc;
        }

        /* The FW would like the default RXQ to be created first */
        rxo = default_rxo(adapter);
        rc = be_cmd_rxq_create(adapter, &rxo->q, rxo->cq.id, rx_frag_size,
                               adapter->if_handle, false, &rxo->rss_id);
        if (rc)
                return rc;

        for_all_rss_queues(adapter, rxo, i) {
                rc = be_cmd_rxq_create(adapter, &rxo->q, rxo->cq.id,
                                       rx_frag_size, adapter->if_handle,
                                       true, &rxo->rss_id);
                if (rc)
                        return rc;
        }

        if (be_multi_rxq(adapter)) {
                for (j = 0; j < 128; j += adapter->num_rx_qs - 1) {
                        for_all_rss_queues(adapter, rxo, i) {
                                if ((j + i) >= 128)
                                        break;
                                rsstable[j + i] = rxo->rss_id;
                        }
                }
                adapter->rss_flags = RSS_ENABLE_TCP_IPV4 | RSS_ENABLE_IPV4 |
                                        RSS_ENABLE_TCP_IPV6 | RSS_ENABLE_IPV6;

                if (!BEx_chip(adapter))
                        adapter->rss_flags |= RSS_ENABLE_UDP_IPV4 |
                                                RSS_ENABLE_UDP_IPV6;

                rc = be_cmd_rss_config(adapter, rsstable, adapter->rss_flags,
                                       128);
                if (rc) {
                        adapter->rss_flags = 0;
                        return rc;
                }
        }

        /* First time posting */
        for_all_rx_queues(adapter, rxo, i)
                be_post_rx_frags(rxo, GFP_KERNEL);
        return 0;
}

static int be_open(struct net_device *netdev)
{
        struct be_adapter *adapter = netdev_priv(netdev);
        struct be_eq_obj *eqo;
        struct be_rx_obj *rxo;
        struct be_tx_obj *txo;
        u8 link_status;
        int status, i;

        status = be_rx_qs_create(adapter);
        if (status)
                goto err;

        status = be_irq_register(adapter);
        if (status)
                goto err;

        for_all_rx_queues(adapter, rxo, i)
                be_cq_notify(adapter, rxo->cq.id, true, 0);

        for_all_tx_queues(adapter, txo, i)
                be_cq_notify(adapter, txo->cq.id, true, 0);

        be_async_mcc_enable(adapter);

        for_all_evt_queues(adapter, eqo, i) {
                napi_enable(&eqo->napi);
                be_eq_notify(adapter, eqo->q.id, true, false, 0);
        }
        adapter->flags |= BE_FLAGS_NAPI_ENABLED;

        status = be_cmd_link_status_query(adapter, NULL, &link_status, 0);
        if (!status)
                be_link_status_update(adapter, link_status);

        netif_tx_start_all_queues(netdev);
        be_roce_dev_open(adapter);
        return 0;
err:
        be_close(adapter->netdev);
        return -EIO;
}

static int be_setup_wol(struct be_adapter *adapter, bool enable)
{
        struct be_dma_mem cmd;
        int status = 0;
        u8 mac[ETH_ALEN];

        memset(mac, 0, ETH_ALEN);

        cmd.size = sizeof(struct be_cmd_req_acpi_wol_magic_config);
        cmd.va = dma_zalloc_coherent(&adapter->pdev->dev, cmd.size, &cmd.dma,
                                     GFP_KERNEL);
        if (cmd.va == NULL)
                return -1;

        if (enable) {
                status = pci_write_config_dword(adapter->pdev,
                        PCICFG_PM_CONTROL_OFFSET, PCICFG_PM_CONTROL_MASK);
                if (status) {
                        dev_err(&adapter->pdev->dev,
                                "Could not enable Wake-on-lan\n");
                        dma_free_coherent(&adapter->pdev->dev, cmd.size, cmd.va,
                                          cmd.dma);
                        return status;
                }
                status = be_cmd_enable_magic_wol(adapter,
                                adapter->netdev->dev_addr, &cmd);
                pci_enable_wake(adapter->pdev, PCI_D3hot, 1);
                pci_enable_wake(adapter->pdev, PCI_D3cold, 1);
        } else {
                status = be_cmd_enable_magic_wol(adapter, mac, &cmd);
                pci_enable_wake(adapter->pdev, PCI_D3hot, 0);
                pci_enable_wake(adapter->pdev, PCI_D3cold, 0);
        }

        dma_free_coherent(&adapter->pdev->dev, cmd.size, cmd.va, cmd.dma);
        return status;
}

/*
 * Generate a seed MAC address from the PF MAC Address using jhash.
 * MAC Address for VFs are assigned incrementally starting from the seed.
 * These addresses are programmed in the ASIC by the PF and the VF driver
 * queries for the MAC address during its probe.
 */
static int be_vf_eth_addr_config(struct be_adapter *adapter)
{
        u32 vf;
        int status = 0;
        u8 mac[ETH_ALEN];
        struct be_vf_cfg *vf_cfg;

        be_vf_eth_addr_generate(adapter, mac);

        for_all_vfs(adapter, vf_cfg, vf) {
                if (BEx_chip(adapter))
                        status = be_cmd_pmac_add(adapter, mac,
                                                 vf_cfg->if_handle,
                                                 &vf_cfg->pmac_id, vf + 1);
                else
                        status = be_cmd_set_mac(adapter, mac, vf_cfg->if_handle,
                                                vf + 1);

                if (status)
                        dev_err(&adapter->pdev->dev,
                        "Mac address assignment failed for VF %d\n", vf);
                else
                        memcpy(vf_cfg->mac_addr, mac, ETH_ALEN);

                mac[5] += 1;
        }
        return status;
}

static int be_vfs_mac_query(struct be_adapter *adapter)
{
        int status, vf;
        u8 mac[ETH_ALEN];
        struct be_vf_cfg *vf_cfg;
        bool active = false;

        for_all_vfs(adapter, vf_cfg, vf) {
                be_cmd_get_mac_from_list(adapter, mac, &active,
                                         &vf_cfg->pmac_id, 0);

                status = be_cmd_mac_addr_query(adapter, mac, false,
                                               vf_cfg->if_handle, 0);
                if (status)
                        return status;
                memcpy(vf_cfg->mac_addr, mac, ETH_ALEN);
        }
        return 0;
}

static void be_vf_clear(struct be_adapter *adapter)
{
        struct be_vf_cfg *vf_cfg;
        u32 vf;

        if (pci_vfs_assigned(adapter->pdev)) {
                dev_warn(&adapter->pdev->dev,
                         "VFs are assigned to VMs: not disabling VFs\n");
                goto done;
        }

        pci_disable_sriov(adapter->pdev);

        for_all_vfs(adapter, vf_cfg, vf) {
                if (BEx_chip(adapter))
                        be_cmd_pmac_del(adapter, vf_cfg->if_handle,
                                        vf_cfg->pmac_id, vf + 1);
                else
                        be_cmd_set_mac(adapter, NULL, vf_cfg->if_handle,
                                       vf + 1);

                be_cmd_if_destroy(adapter, vf_cfg->if_handle, vf + 1);
        }
done:
        kfree(adapter->vf_cfg);
        adapter->num_vfs = 0;
}

static void be_clear_queues(struct be_adapter *adapter)
{
        be_mcc_queues_destroy(adapter);
        be_rx_cqs_destroy(adapter);
        be_tx_queues_destroy(adapter);
        be_evt_queues_destroy(adapter);
}

static void be_cancel_worker(struct be_adapter *adapter)
{
        if (adapter->flags & BE_FLAGS_WORKER_SCHEDULED) {
                cancel_delayed_work_sync(&adapter->work);
                adapter->flags &= ~BE_FLAGS_WORKER_SCHEDULED;
        }
}

static int be_clear(struct be_adapter *adapter)
{
        int i;

        be_cancel_worker(adapter);

        if (sriov_enabled(adapter))
                be_vf_clear(adapter);

        /* delete the primary mac along with the uc-mac list */
        for (i = 0; i < (adapter->uc_macs + 1); i++)
                be_cmd_pmac_del(adapter, adapter->if_handle,
                                adapter->pmac_id[i], 0);
        adapter->uc_macs = 0;

        be_cmd_if_destroy(adapter, adapter->if_handle,  0);

        be_clear_queues(adapter);

        kfree(adapter->pmac_id);
        adapter->pmac_id = NULL;

        be_msix_disable(adapter);
        return 0;
}

static int be_vfs_if_create(struct be_adapter *adapter)
{
        struct be_resources res = {0};
        struct be_vf_cfg *vf_cfg;
        u32 cap_flags, en_flags, vf;
        int status = 0;

        cap_flags = BE_IF_FLAGS_UNTAGGED | BE_IF_FLAGS_BROADCAST |
                    BE_IF_FLAGS_MULTICAST;

        for_all_vfs(adapter, vf_cfg, vf) {
                if (!BE3_chip(adapter)) {
                        status = be_cmd_get_profile_config(adapter, &res,
                                                           vf + 1);
                        if (!status)
                                cap_flags = res.if_cap_flags;
                }

                /* If a FW profile exists, then cap_flags are updated */
                en_flags = cap_flags & (BE_IF_FLAGS_UNTAGGED |
                           BE_IF_FLAGS_BROADCAST | BE_IF_FLAGS_MULTICAST);
                status = be_cmd_if_create(adapter, cap_flags, en_flags,
                                          &vf_cfg->if_handle, vf + 1);
                if (status)
                        goto err;
        }
err:
        return status;
}

static int be_vf_setup_init(struct be_adapter *adapter)
{
        struct be_vf_cfg *vf_cfg;
        int vf;

        adapter->vf_cfg = kcalloc(adapter->num_vfs, sizeof(*vf_cfg),
                                  GFP_KERNEL);
        if (!adapter->vf_cfg)
                return -ENOMEM;

        for_all_vfs(adapter, vf_cfg, vf) {
                vf_cfg->if_handle = -1;
                vf_cfg->pmac_id = -1;
        }
        return 0;
}

static int be_vf_setup(struct be_adapter *adapter)
{
        struct be_vf_cfg *vf_cfg;
        u16 def_vlan, lnk_speed;
        int status, old_vfs, vf;
        struct device *dev = &adapter->pdev->dev;
        u32 privileges;

        old_vfs = pci_num_vf(adapter->pdev);
        if (old_vfs) {
                dev_info(dev, "%d VFs are already enabled\n", old_vfs);
                if (old_vfs != num_vfs)
                        dev_warn(dev, "Ignoring num_vfs=%d setting\n", num_vfs);
                adapter->num_vfs = old_vfs;
        } else {
                if (num_vfs > be_max_vfs(adapter))
                        dev_info(dev, "Device supports %d VFs and not %d\n",
                                 be_max_vfs(adapter), num_vfs);
                adapter->num_vfs = min_t(u16, num_vfs, be_max_vfs(adapter));
                if (!adapter->num_vfs)
                        return 0;
        }

        status = be_vf_setup_init(adapter);
        if (status)
                goto err;

        if (old_vfs) {
                for_all_vfs(adapter, vf_cfg, vf) {
                        status = be_cmd_get_if_id(adapter, vf_cfg, vf);
                        if (status)
                                goto err;
                }
        } else {
                status = be_vfs_if_create(adapter);
                if (status)
                        goto err;
        }

        if (old_vfs) {
                status = be_vfs_mac_query(adapter);
                if (status)
                        goto err;
        } else {
                status = be_vf_eth_addr_config(adapter);
                if (status)
                        goto err;
        }

        for_all_vfs(adapter, vf_cfg, vf) {
                /* Allow VFs to programs MAC/VLAN filters */
                status = be_cmd_get_fn_privileges(adapter, &privileges, vf + 1);
                if (!status && !(privileges & BE_PRIV_FILTMGMT)) {
                        status = be_cmd_set_fn_privileges(adapter,
                                                          privileges |
                                                          BE_PRIV_FILTMGMT,
                                                          vf + 1);
                        if (!status)
                                dev_info(dev, "VF%d has FILTMGMT privilege\n",
                                         vf);
                }

                /* BE3 FW, by default, caps VF TX-rate to 100mbps.
                 * Allow full available bandwidth
                 */
                if (BE3_chip(adapter) && !old_vfs)
                        be_cmd_set_qos(adapter, 1000, vf+1);

                status = be_cmd_link_status_query(adapter, &lnk_speed,
                                                  NULL, vf + 1);
                if (!status)
                        vf_cfg->tx_rate = lnk_speed;

                status = be_cmd_get_hsw_config(adapter, &def_vlan,
                                               vf + 1, vf_cfg->if_handle, NULL);
                if (status)
                        goto err;
                vf_cfg->def_vid = def_vlan;

                be_cmd_enable_vf(adapter, vf + 1);
        }

        if (!old_vfs) {
                status = pci_enable_sriov(adapter->pdev, adapter->num_vfs);
                if (status) {
                        dev_err(dev, "SRIOV enable failed\n");
                        adapter->num_vfs = 0;
                        goto err;
                }
        }
        return 0;
err:
        dev_err(dev, "VF setup failed\n");
        be_vf_clear(adapter);
        return status;
}

/* On BE2/BE3 FW does not suggest the supported limits */
static void BEx_get_resources(struct be_adapter *adapter,
                              struct be_resources *res)
{
        struct pci_dev *pdev = adapter->pdev;
        bool use_sriov = false;

        if (BE3_chip(adapter) && be_physfn(adapter)) {
                int max_vfs;

                max_vfs = pci_sriov_get_totalvfs(pdev);
                res->max_vfs = max_vfs > 0 ? min(MAX_VFS, max_vfs) : 0;
                use_sriov = res->max_vfs && num_vfs;
        }

        if (be_physfn(adapter))
                res->max_uc_mac = BE_UC_PMAC_COUNT;
        else
                res->max_uc_mac = BE_VF_UC_PMAC_COUNT;

        if (adapter->function_mode & FLEX10_MODE)
                res->max_vlans = BE_NUM_VLANS_SUPPORTED/8;
        else if (adapter->function_mode & UMC_ENABLED)
                res->max_vlans = BE_UMC_NUM_VLANS_SUPPORTED;
        else
                res->max_vlans = BE_NUM_VLANS_SUPPORTED;
        res->max_mcast_mac = BE_MAX_MC;

        if (BE2_chip(adapter) || use_sriov || be_is_mc(adapter) ||
            !be_physfn(adapter))
                res->max_tx_qs = 1;
        else
                res->max_tx_qs = BE3_MAX_TX_QS;

        if ((adapter->function_caps & BE_FUNCTION_CAPS_RSS) &&
            !use_sriov && be_physfn(adapter))
                res->max_rss_qs = (adapter->be3_native) ?
                                           BE3_MAX_RSS_QS : BE2_MAX_RSS_QS;
        res->max_rx_qs = res->max_rss_qs + 1;

        res->max_evt_qs = be_physfn(adapter) ? BE3_MAX_EVT_QS : 1;

        res->if_cap_flags = BE_IF_CAP_FLAGS_WANT;