// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 1999 - 2018 Intel Corporation. */

#include <linux/types.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/vmalloc.h>
#include <linux/string.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/ipv6.h>
#include <linux/if_bridge.h>
#ifdef NETIF_F_HW_VLAN_CTAG_TX
#include <linux/if_vlan.h>
#endif

#include "ixgbe.h"
#include "ixgbe_type.h"
#include "ixgbe_mbx.h"
#include "ixgbe_sriov.h"

#ifdef CONFIG_PCI_IOV
static inline void ixgbe_alloc_vf_macvlans(struct ixgbe_adapter *adapter,
                                           unsigned int num_vfs)
{
        struct ixgbe_hw *hw = &adapter->hw;
        struct vf_macvlans *mv_list;
        int num_vf_macvlans, i;

        /* Initialize list of VF macvlans */
        INIT_LIST_HEAD(&adapter->vf_mvs.l);

        num_vf_macvlans = hw->mac.num_rar_entries -
                          (IXGBE_MAX_PF_MACVLANS + 1 + num_vfs);
        if (!num_vf_macvlans)
                return;

        mv_list = kzalloc_objs(struct vf_macvlans, num_vf_macvlans);
        if (mv_list) {
                for (i = 0; i < num_vf_macvlans; i++) {
                        mv_list[i].vf = -1;
                        mv_list[i].free = true;
                        list_add(&mv_list[i].l, &adapter->vf_mvs.l);
                }
                adapter->mv_list = mv_list;
        }
}

static int __ixgbe_enable_sriov(struct ixgbe_adapter *adapter,
                                unsigned int num_vfs)
{
        struct ixgbe_hw *hw = &adapter->hw;
        int i;

        if (adapter->xdp_prog) {
                e_warn(probe, "SRIOV is not supported with XDP\n");
                return -EINVAL;
        }

        /* Enable VMDq flag so device will be set in VM mode */
        adapter->flags |= IXGBE_FLAG_SRIOV_ENABLED |
                          IXGBE_FLAG_VMDQ_ENABLED;

        /* Allocate memory for per VF control structures */
        adapter->vfinfo = kzalloc_objs(struct vf_data_storage, num_vfs);
        if (!adapter->vfinfo)
                return -ENOMEM;

        adapter->num_vfs = num_vfs;

        ixgbe_alloc_vf_macvlans(adapter, num_vfs);
        adapter->ring_feature[RING_F_VMDQ].offset = num_vfs;

        /* Initialize default switching mode VEB */
        IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
        adapter->bridge_mode = BRIDGE_MODE_VEB;

        /* limit traffic classes based on VFs enabled */
        if ((adapter->hw.mac.type == ixgbe_mac_82599EB) && (num_vfs < 16)) {
                adapter->dcb_cfg.num_tcs.pg_tcs = MAX_TRAFFIC_CLASS;
                adapter->dcb_cfg.num_tcs.pfc_tcs = MAX_TRAFFIC_CLASS;
        } else if (num_vfs < 32) {
                adapter->dcb_cfg.num_tcs.pg_tcs = 4;
                adapter->dcb_cfg.num_tcs.pfc_tcs = 4;
        } else {
                adapter->dcb_cfg.num_tcs.pg_tcs = 1;
                adapter->dcb_cfg.num_tcs.pfc_tcs = 1;
        }

        /* Disable RSC when in SR-IOV mode */
        adapter->flags2 &= ~(IXGBE_FLAG2_RSC_CAPABLE |
                             IXGBE_FLAG2_RSC_ENABLED);

        for (i = 0; i < num_vfs; i++) {
                /* enable spoof checking for all VFs */
                adapter->vfinfo[i].spoofchk_enabled = true;
                adapter->vfinfo[i].link_enable = true;

                /* We support VF RSS querying only for 82599 and x540
                 * devices at the moment. These devices share RSS
                 * indirection table and RSS hash key with PF therefore
                 * we want to disable the querying by default.
                 */
                adapter->vfinfo[i].rss_query_enabled = false;

                /* Untrust all VFs */
                adapter->vfinfo[i].trusted = false;

                /* set the default xcast mode */
                adapter->vfinfo[i].xcast_mode = IXGBEVF_XCAST_MODE_NONE;
        }

        e_info(probe, "SR-IOV enabled with %d VFs\n", num_vfs);
        return 0;
}

/**
 * ixgbe_get_vfs - Find and take references to all vf devices
 * @adapter: Pointer to adapter struct
 */
static void ixgbe_get_vfs(struct ixgbe_adapter *adapter)
{
        struct pci_dev *pdev = adapter->pdev;
        u16 vendor = pdev->vendor;
        struct pci_dev *vfdev;
        int vf = 0;
        u16 vf_id;
        int pos;

        pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
        if (!pos)
                return;
        pci_read_config_word(pdev, pos + PCI_SRIOV_VF_DID, &vf_id);

        vfdev = pci_get_device(vendor, vf_id, NULL);
        for (; vfdev; vfdev = pci_get_device(vendor, vf_id, vfdev)) {
                if (!vfdev->is_virtfn)
                        continue;
                if (vfdev->physfn != pdev)
                        continue;
                if (vf >= adapter->num_vfs)
                        continue;
                pci_dev_get(vfdev);
                adapter->vfinfo[vf].vfdev = vfdev;
                ++vf;
        }
}

/* Note this function is called when the user wants to enable SR-IOV
 * VFs using the now deprecated module parameter
 */
void ixgbe_enable_sriov(struct ixgbe_adapter *adapter, unsigned int max_vfs)
{
        int pre_existing_vfs = 0;
        unsigned int num_vfs;

        pre_existing_vfs = pci_num_vf(adapter->pdev);
        if (!pre_existing_vfs && !max_vfs)
                return;

        /* If there are pre-existing VFs then we have to force
         * use of that many - over ride any module parameter value.
         * This may result from the user unloading the PF driver
         * while VFs were assigned to guest VMs or because the VFs
         * have been created via the new PCI SR-IOV sysfs interface.
         */
        if (pre_existing_vfs) {
                num_vfs = pre_existing_vfs;
                dev_warn(&adapter->pdev->dev,
                         "Virtual Functions already enabled for this device - Please reload all VF drivers to avoid spoofed packet errors\n");
        } else {
                int err;
                /*
                 * The 82599 supports up to 64 VFs per physical function
                 * but this implementation limits allocation to 63 so that
                 * basic networking resources are still available to the
                 * physical function.  If the user requests greater than
                 * 63 VFs then it is an error - reset to default of zero.
                 */
                num_vfs = min_t(unsigned int, max_vfs, IXGBE_MAX_VFS_DRV_LIMIT);

                err = pci_enable_sriov(adapter->pdev, num_vfs);
                if (err) {
                        e_err(probe, "Failed to enable PCI sriov: %d\n", err);
                        return;
                }
        }

        if (!__ixgbe_enable_sriov(adapter, num_vfs)) {
                ixgbe_get_vfs(adapter);
                return;
        }

        /* If we have gotten to this point then there is no memory available
         * to manage the VF devices - print message and bail.
         */
        e_err(probe, "Unable to allocate memory for VF Data Storage - "
              "SRIOV disabled\n");
        ixgbe_disable_sriov(adapter);
}

#endif /* #ifdef CONFIG_PCI_IOV */
int ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
{
        unsigned int num_vfs = adapter->num_vfs, vf;
        struct ixgbe_hw *hw = &adapter->hw;
        unsigned long flags;
        int rss;

        spin_lock_irqsave(&adapter->vfs_lock, flags);
        /* set num VFs to 0 to prevent access to vfinfo */
        adapter->num_vfs = 0;
        spin_unlock_irqrestore(&adapter->vfs_lock, flags);

        /* put the reference to all of the vf devices */
        for (vf = 0; vf < num_vfs; ++vf) {
                struct pci_dev *vfdev = adapter->vfinfo[vf].vfdev;

                if (!vfdev)
                        continue;
                adapter->vfinfo[vf].vfdev = NULL;
                pci_dev_put(vfdev);
        }

        /* free VF control structures */
        kfree(adapter->vfinfo);
        adapter->vfinfo = NULL;

        /* free macvlan list */
        kfree(adapter->mv_list);
        adapter->mv_list = NULL;

        /* if SR-IOV is already disabled then there is nothing to do */
        if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
                return 0;

        if (hw->mac.ops.disable_mdd)
                hw->mac.ops.disable_mdd(hw);

#ifdef CONFIG_PCI_IOV
        /*
         * If our VFs are assigned we cannot shut down SR-IOV
         * without causing issues, so just leave the hardware
         * available but disabled
         */
        if (pci_vfs_assigned(adapter->pdev)) {
                e_dev_warn("Unloading driver while VFs are assigned - VFs will not be deallocated\n");
                return -EPERM;
        }
        /* disable iov and allow time for transactions to clear */
        pci_disable_sriov(adapter->pdev);
#endif

        /* Disable VMDq flag so device will be set in VM mode */
        if (bitmap_weight(adapter->fwd_bitmask, adapter->num_rx_pools) == 1) {
                adapter->flags &= ~IXGBE_FLAG_VMDQ_ENABLED;
                adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
                rss = min_t(int, ixgbe_max_rss_indices(adapter),
                            num_online_cpus());
        } else {
                rss = min_t(int, IXGBE_MAX_L2A_QUEUES, num_online_cpus());
        }

        adapter->ring_feature[RING_F_VMDQ].offset = 0;
        adapter->ring_feature[RING_F_RSS].limit = rss;

        /* take a breather then clean up driver data */
        msleep(100);
        return 0;
}

static int ixgbe_pci_sriov_enable(struct pci_dev *dev, int num_vfs)
{
#ifdef CONFIG_PCI_IOV
        struct ixgbe_adapter *adapter = pci_get_drvdata(dev);
        int pre_existing_vfs = pci_num_vf(dev);
        int err = 0, num_rx_pools, i, limit;
        u8 num_tc;

        if (pre_existing_vfs && pre_existing_vfs != num_vfs)
                err = ixgbe_disable_sriov(adapter);
        else if (pre_existing_vfs && pre_existing_vfs == num_vfs)
                return num_vfs;

        if (err)
                return err;

        /* While the SR-IOV capability structure reports total VFs to be 64,
         * we limit the actual number allocated as below based on two factors.
         *    Num_TCs   MAX_VFs
         *      1         63
         *      <=4       31
         *      >4        15
         * First, we reserve some transmit/receive resources for the PF.
         * Second, VMDQ also uses the same pools that SR-IOV does. We need to
         * account for this, so that we don't accidentally allocate more VFs
         * than we have available pools. The PCI bus driver already checks for
         * other values out of range.
         */
        num_tc = adapter->hw_tcs;
        num_rx_pools = bitmap_weight(adapter->fwd_bitmask,
                                     adapter->num_rx_pools);
        limit = (num_tc > 4) ? IXGBE_MAX_VFS_8TC :
                (num_tc > 1) ? IXGBE_MAX_VFS_4TC : IXGBE_MAX_VFS_1TC;

        if (num_vfs > (limit - num_rx_pools)) {
                e_dev_err("Currently configured with %d TCs, and %d offloaded macvlans. Creating more than %d VFs is not allowed\n",
                          num_tc, num_rx_pools - 1, limit - num_rx_pools);
                return -EPERM;
        }

        err = __ixgbe_enable_sriov(adapter, num_vfs);
        if (err)
                return  err;

        for (i = 0; i < num_vfs; i++)
                ixgbe_vf_configuration(dev, (i | 0x10000000));

        /* reset before enabling SRIOV to avoid mailbox issues */
        ixgbe_sriov_reinit(adapter);

        err = pci_enable_sriov(dev, num_vfs);
        if (err) {
                e_dev_warn("Failed to enable PCI sriov: %d\n", err);
                return err;
        }
        ixgbe_get_vfs(adapter);

        return num_vfs;
#else
        return 0;
#endif
}

static int ixgbe_pci_sriov_disable(struct pci_dev *dev)
{
        struct ixgbe_adapter *adapter = pci_get_drvdata(dev);
        int err;
#ifdef CONFIG_PCI_IOV
        u32 current_flags = adapter->flags;
        int prev_num_vf = pci_num_vf(dev);
#endif

        err = ixgbe_disable_sriov(adapter);

        /* Only reinit if no error and state changed */
#ifdef CONFIG_PCI_IOV
        if (!err && (current_flags != adapter->flags ||
                     prev_num_vf != pci_num_vf(dev)))
                ixgbe_sriov_reinit(adapter);
#endif

        return err;
}

int ixgbe_pci_sriov_configure(struct pci_dev *dev, int num_vfs)
{
        if (num_vfs == 0)
                return ixgbe_pci_sriov_disable(dev);
        else
                return ixgbe_pci_sriov_enable(dev, num_vfs);
}

static int ixgbe_set_vf_multicasts(struct ixgbe_adapter *adapter,
                                   u32 *msgbuf, u32 vf)
{
        int entries = FIELD_GET(IXGBE_VT_MSGINFO_MASK, msgbuf[0]);
        u16 *hash_list = (u16 *)&msgbuf[1];
        struct vf_data_storage *vfinfo = &adapter->vfinfo[vf];
        struct ixgbe_hw *hw = &adapter->hw;
        int i;
        u32 vector_bit;
        u32 vector_reg;
        u32 mta_reg;
        u32 vmolr = IXGBE_READ_REG(hw, IXGBE_VMOLR(vf));

        /* only so many hash values supported */
        entries = min(entries, IXGBE_MAX_VF_MC_ENTRIES);

        /*
         * salt away the number of multi cast addresses assigned
         * to this VF for later use to restore when the PF multi cast
         * list changes
         */
        vfinfo->num_vf_mc_hashes = entries;

        /*
         * VFs are limited to using the MTA hash table for their multicast
         * addresses
         */
        for (i = 0; i < entries; i++) {
                vfinfo->vf_mc_hashes[i] = hash_list[i];
        }

        for (i = 0; i < vfinfo->num_vf_mc_hashes; i++) {
                vector_reg = (vfinfo->vf_mc_hashes[i] >> 5) & 0x7F;
                vector_bit = vfinfo->vf_mc_hashes[i] & 0x1F;
                mta_reg = IXGBE_READ_REG(hw, IXGBE_MTA(vector_reg));
                mta_reg |= BIT(vector_bit);
                IXGBE_WRITE_REG(hw, IXGBE_MTA(vector_reg), mta_reg);
        }
        vmolr |= IXGBE_VMOLR_ROMPE;
        IXGBE_WRITE_REG(hw, IXGBE_VMOLR(vf), vmolr);

        return 0;
}

#ifdef CONFIG_PCI_IOV
void ixgbe_restore_vf_multicasts(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        struct vf_data_storage *vfinfo;
        int i, j;
        u32 vector_bit;
        u32 vector_reg;
        u32 mta_reg;

        for (i = 0; i < adapter->num_vfs; i++) {
                u32 vmolr = IXGBE_READ_REG(hw, IXGBE_VMOLR(i));
                vfinfo = &adapter->vfinfo[i];
                for (j = 0; j < vfinfo->num_vf_mc_hashes; j++) {
                        hw->addr_ctrl.mta_in_use++;
                        vector_reg = (vfinfo->vf_mc_hashes[j] >> 5) & 0x7F;
                        vector_bit = vfinfo->vf_mc_hashes[j] & 0x1F;
                        mta_reg = IXGBE_READ_REG(hw, IXGBE_MTA(vector_reg));
                        mta_reg |= BIT(vector_bit);
                        IXGBE_WRITE_REG(hw, IXGBE_MTA(vector_reg), mta_reg);
                }

                if (vfinfo->num_vf_mc_hashes)
                        vmolr |= IXGBE_VMOLR_ROMPE;
                else
                        vmolr &= ~IXGBE_VMOLR_ROMPE;
                IXGBE_WRITE_REG(hw, IXGBE_VMOLR(i), vmolr);
        }

        /* Restore any VF macvlans */
        ixgbe_full_sync_mac_table(adapter);
}
#endif

static int ixgbe_set_vf_vlan(struct ixgbe_adapter *adapter, int add, int vid,
                             u32 vf)
{
        struct ixgbe_hw *hw = &adapter->hw;
        int err;

        /* If VLAN overlaps with one the PF is currently monitoring make
         * sure that we are able to allocate a VLVF entry.  This may be
         * redundant but it guarantees PF will maintain visibility to
         * the VLAN.
         */
        if (add && test_bit(vid, adapter->active_vlans)) {
                err = hw->mac.ops.set_vfta(hw, vid, VMDQ_P(0), true, false);
                if (err)
                        return err;
        }

        err = hw->mac.ops.set_vfta(hw, vid, vf, !!add, false);

        if (add && !err)
                return err;

        /* If we failed to add the VF VLAN or we are removing the VF VLAN
         * we may need to drop the PF pool bit in order to allow us to free
         * up the VLVF resources.
         */
        if (test_bit(vid, adapter->active_vlans) ||
            (adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
                ixgbe_update_pf_promisc_vlvf(adapter, vid);

        return err;
}

static int ixgbe_set_vf_lpe(struct ixgbe_adapter *adapter, u32 max_frame, u32 vf)
{
        struct ixgbe_hw *hw = &adapter->hw;
        u32 max_frs;

        if (max_frame < ETH_MIN_MTU || max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE) {
                e_err(drv, "VF max_frame %d out of range\n", max_frame);
                return -EINVAL;
        }

        /*
         * For 82599EB we have to keep all PFs and VFs operating with
         * the same max_frame value in order to avoid sending an oversize
         * frame to a VF.  In order to guarantee this is handled correctly
         * for all cases we have several special exceptions to take into
         * account before we can enable the VF for receive
         */
        if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
                struct net_device *dev = adapter->netdev;
                int pf_max_frame = dev->mtu + ETH_HLEN;
                u32 reg_offset, vf_shift, vfre;
                int err = 0;

#ifdef CONFIG_FCOE
                if (dev->fcoe_mtu)
                        pf_max_frame = max_t(int, pf_max_frame,
                                             IXGBE_FCOE_JUMBO_FRAME_SIZE);

#endif /* CONFIG_FCOE */
                switch (adapter->vfinfo[vf].vf_api) {
                case ixgbe_mbox_api_11:
                case ixgbe_mbox_api_12:
                case ixgbe_mbox_api_13:
                case ixgbe_mbox_api_14:
                case ixgbe_mbox_api_16:
                case ixgbe_mbox_api_17:
                        /* Version 1.1 supports jumbo frames on VFs if PF has
                         * jumbo frames enabled which means legacy VFs are
                         * disabled
                         */
                        if (pf_max_frame > ETH_FRAME_LEN)
                                break;
                        fallthrough;
                default:
                        /* If the PF or VF are running w/ jumbo frames enabled
                         * we need to shut down the VF Rx path as we cannot
                         * support jumbo frames on legacy VFs
                         */
                        if ((pf_max_frame > ETH_FRAME_LEN) ||
                            (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)))
                                err = -EINVAL;
                        break;
                }

                /* determine VF receive enable location */
                vf_shift = vf % 32;
                reg_offset = vf / 32;

                /* enable or disable receive depending on error */
                vfre = IXGBE_READ_REG(hw, IXGBE_VFRE(reg_offset));
                if (err)
                        vfre &= ~BIT(vf_shift);
                else
                        vfre |= BIT(vf_shift);
                IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), vfre);

                if (err) {
                        e_err(drv, "VF max_frame %d out of range\n", max_frame);
                        return err;
                }
        }

        /* pull current max frame size from hardware */
        max_frs = IXGBE_READ_REG(hw, IXGBE_MAXFRS);
        max_frs &= IXGBE_MHADD_MFS_MASK;
        max_frs >>= IXGBE_MHADD_MFS_SHIFT;

        if (max_frs < max_frame) {
                max_frs = max_frame << IXGBE_MHADD_MFS_SHIFT;
                IXGBE_WRITE_REG(hw, IXGBE_MAXFRS, max_frs);
        }

        e_info(hw, "VF requests change max MTU to %d\n", max_frame);

        return 0;
}

static void ixgbe_set_vmolr(struct ixgbe_hw *hw, u32 vf, bool aupe)
{
        u32 vmolr = IXGBE_READ_REG(hw, IXGBE_VMOLR(vf));
        vmolr |= IXGBE_VMOLR_BAM;
        if (aupe)
                vmolr |= IXGBE_VMOLR_AUPE;
        else
                vmolr &= ~IXGBE_VMOLR_AUPE;
        IXGBE_WRITE_REG(hw, IXGBE_VMOLR(vf), vmolr);
}

static void ixgbe_clear_vmvir(struct ixgbe_adapter *adapter, u32 vf)
{
        struct ixgbe_hw *hw = &adapter->hw;

        IXGBE_WRITE_REG(hw, IXGBE_VMVIR(vf), 0);
}

static void ixgbe_clear_vf_vlans(struct ixgbe_adapter *adapter, u32 vf)
{
        struct ixgbe_hw *hw = &adapter->hw;
        u32 vlvfb_mask, pool_mask, i;

        /* create mask for VF and other pools */
        pool_mask = ~BIT(VMDQ_P(0) % 32);
        vlvfb_mask = BIT(vf % 32);

        /* post increment loop, covers VLVF_ENTRIES - 1 to 0 */
        for (i = IXGBE_VLVF_ENTRIES; i--;) {
                u32 bits[2], vlvfb, vid, vfta, vlvf;
                u32 word = i * 2 + vf / 32;
                u32 mask;

                vlvfb = IXGBE_READ_REG(hw, IXGBE_VLVFB(word));

                /* if our bit isn't set we can skip it */
                if (!(vlvfb & vlvfb_mask))
                        continue;

                /* clear our bit from vlvfb */
                vlvfb ^= vlvfb_mask;

                /* create 64b mask to chedk to see if we should clear VLVF */
                bits[word % 2] = vlvfb;
                bits[~word % 2] = IXGBE_READ_REG(hw, IXGBE_VLVFB(word ^ 1));

                /* if other pools are present, just remove ourselves */
                if (bits[(VMDQ_P(0) / 32) ^ 1] ||
                    (bits[VMDQ_P(0) / 32] & pool_mask))
                        goto update_vlvfb;

                /* if PF is present, leave VFTA */
                if (bits[0] || bits[1])
                        goto update_vlvf;

                /* if we cannot determine VLAN just remove ourselves */
                vlvf = IXGBE_READ_REG(hw, IXGBE_VLVF(i));
                if (!vlvf)
                        goto update_vlvfb;

                vid = vlvf & VLAN_VID_MASK;
                mask = BIT(vid % 32);

                /* clear bit from VFTA */
                vfta = IXGBE_READ_REG(hw, IXGBE_VFTA(vid / 32));
                if (vfta & mask)
                        IXGBE_WRITE_REG(hw, IXGBE_VFTA(vid / 32), vfta ^ mask);
update_vlvf:
                /* clear POOL selection enable */
                IXGBE_WRITE_REG(hw, IXGBE_VLVF(i), 0);

                if (!(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
                        vlvfb = 0;
update_vlvfb:
                /* clear pool bits */
                IXGBE_WRITE_REG(hw, IXGBE_VLVFB(word), vlvfb);
        }
}

static int ixgbe_set_vf_macvlan(struct ixgbe_adapter *adapter,
                                int vf, int index, unsigned char *mac_addr)
{
        struct vf_macvlans *entry;
        bool found = false;
        int retval = 0;

        if (index <= 1) {
                list_for_each_entry(entry, &adapter->vf_mvs.l, l) {
                        if (entry->vf == vf) {
                                entry->vf = -1;
                                entry->free = true;
                                entry->is_macvlan = false;
                                ixgbe_del_mac_filter(adapter,
                                                     entry->vf_macvlan, vf);
                        }
                }
        }

        /*
         * If index was zero then we were asked to clear the uc list
         * for the VF.  We're done.
         */
        if (!index)
                return 0;

        list_for_each_entry(entry, &adapter->vf_mvs.l, l) {
                if (entry->free) {
                        found = true;
                        break;
                }
        }

        /*
         * If we traversed the entire list and didn't find a free entry
         * then we're out of space on the RAR table.  It's also possible
         * for the &adapter->vf_mvs.l list to be empty because the original
         * memory allocation for the list failed, which is not fatal but does
         * mean we can't support VF requests for MACVLAN because we couldn't
         * allocate memory for the list management required.
         */
        if (!found)
                return -ENOSPC;

        retval = ixgbe_add_mac_filter(adapter, mac_addr, vf);
        if (retval < 0)
                return retval;

        entry->free = false;
        entry->is_macvlan = true;
        entry->vf = vf;
        memcpy(entry->vf_macvlan, mac_addr, ETH_ALEN);

        return 0;
}

static inline void ixgbe_vf_reset_event(struct ixgbe_adapter *adapter, u32 vf)
{
        struct ixgbe_hw *hw = &adapter->hw;
        struct ixgbe_ring_feature *vmdq = &adapter->ring_feature[RING_F_VMDQ];
        struct vf_data_storage *vfinfo = &adapter->vfinfo[vf];
        u32 q_per_pool = __ALIGN_MASK(1, ~vmdq->mask);
        u8 num_tcs = adapter->hw_tcs;
        u32 reg_val;
        u32 queue;

        /* remove VLAN filters belonging to this VF */
        ixgbe_clear_vf_vlans(adapter, vf);

        /* add back PF assigned VLAN or VLAN 0 */
        ixgbe_set_vf_vlan(adapter, true, vfinfo->pf_vlan, vf);

        /* reset offloads to defaults */
        ixgbe_set_vmolr(hw, vf, !vfinfo->pf_vlan);

        /* set outgoing tags for VFs */
        if (!vfinfo->pf_vlan && !vfinfo->pf_qos && !num_tcs) {
                ixgbe_clear_vmvir(adapter, vf);
        } else {
                if (vfinfo->pf_qos || !num_tcs)
                        ixgbe_set_vmvir(adapter, vfinfo->pf_vlan,
                                        vfinfo->pf_qos, vf);
                else
                        ixgbe_set_vmvir(adapter, vfinfo->pf_vlan,
                                        adapter->default_up, vf);

                if (vfinfo->spoofchk_enabled) {
                        hw->mac.ops.set_vlan_anti_spoofing(hw, true, vf);
                        hw->mac.ops.set_mac_anti_spoofing(hw, true, vf);
                }
        }

        /* reset multicast table array for vf */
        adapter->vfinfo[vf].num_vf_mc_hashes = 0;

        /* clear any ipsec table info */
        ixgbe_ipsec_vf_clear(adapter, vf);

        /* Flush and reset the mta with the new values */
        ixgbe_set_rx_mode(adapter->netdev);

        ixgbe_del_mac_filter(adapter, adapter->vfinfo[vf].vf_mac_addresses, vf);
        ixgbe_set_vf_macvlan(adapter, vf, 0, NULL);

        /* reset VF api back to unknown */
        adapter->vfinfo[vf].vf_api = ixgbe_mbox_api_10;

        /* Restart each queue for given VF */
        for (queue = 0; queue < q_per_pool; queue++) {
                unsigned int reg_idx = (vf * q_per_pool) + queue;

                reg_val = IXGBE_READ_REG(hw, IXGBE_PVFTXDCTL(reg_idx));

                /* Re-enabling only configured queues */
                if (reg_val) {
                        reg_val |= IXGBE_TXDCTL_ENABLE;
                        IXGBE_WRITE_REG(hw, IXGBE_PVFTXDCTL(reg_idx), reg_val);
                        reg_val &= ~IXGBE_TXDCTL_ENABLE;
                        IXGBE_WRITE_REG(hw, IXGBE_PVFTXDCTL(reg_idx), reg_val);
                }
        }

        IXGBE_WRITE_FLUSH(hw);
}

static void ixgbe_vf_clear_mbx(struct ixgbe_adapter *adapter, u32 vf)
{
        struct ixgbe_hw *hw = &adapter->hw;
        u32 word;

        /* Clear VF's mailbox memory */
        for (word = 0; word < IXGBE_VFMAILBOX_SIZE; word++)
                IXGBE_WRITE_REG_ARRAY(hw, IXGBE_PFMBMEM(vf), word, 0);

        IXGBE_WRITE_FLUSH(hw);
}

static int ixgbe_set_vf_mac(struct ixgbe_adapter *adapter,
                            int vf, unsigned char *mac_addr)
{
        int retval;

        ixgbe_del_mac_filter(adapter, adapter->vfinfo[vf].vf_mac_addresses, vf);
        retval = ixgbe_add_mac_filter(adapter, mac_addr, vf);
        if (retval >= 0)
                memcpy(adapter->vfinfo[vf].vf_mac_addresses, mac_addr,
                       ETH_ALEN);
        else
                eth_zero_addr(adapter->vfinfo[vf].vf_mac_addresses);

        return retval;
}

int ixgbe_vf_configuration(struct pci_dev *pdev, unsigned int event_mask)
{
        struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
        unsigned int vfn = (event_mask & 0x3f);

        bool enable = ((event_mask & 0x10000000U) != 0);

        if (enable)
                eth_zero_addr(adapter->vfinfo[vfn].vf_mac_addresses);

        return 0;
}

static inline void ixgbe_write_qde(struct ixgbe_adapter *adapter, u32 vf,
                                   u32 qde)
{
        struct ixgbe_hw *hw = &adapter->hw;
        struct ixgbe_ring_feature *vmdq = &adapter->ring_feature[RING_F_VMDQ];
        u32 q_per_pool = __ALIGN_MASK(1, ~vmdq->mask);
        int i;

        for (i = vf * q_per_pool; i < ((vf + 1) * q_per_pool); i++) {
                u32 reg;

                /* flush previous write */
                IXGBE_WRITE_FLUSH(hw);

                /* indicate to hardware that we want to set drop enable */
                reg = IXGBE_QDE_WRITE | qde;
                reg |= i <<  IXGBE_QDE_IDX_SHIFT;
                IXGBE_WRITE_REG(hw, IXGBE_QDE, reg);
        }
}

/**
 * ixgbe_set_vf_rx_tx - Set VF rx tx
 * @adapter: Pointer to adapter struct
 * @vf: VF identifier
 *
 * Set or reset correct transmit and receive for vf
 **/
static void ixgbe_set_vf_rx_tx(struct ixgbe_adapter *adapter, int vf)
{
        u32 reg_cur_tx, reg_cur_rx, reg_req_tx, reg_req_rx;
        struct ixgbe_hw *hw = &adapter->hw;
        u32 reg_offset, vf_shift;

        vf_shift = vf % 32;
        reg_offset = vf / 32;

        reg_cur_tx = IXGBE_READ_REG(hw, IXGBE_VFTE(reg_offset));
        reg_cur_rx = IXGBE_READ_REG(hw, IXGBE_VFRE(reg_offset));

        if (adapter->vfinfo[vf].link_enable) {
                reg_req_tx = reg_cur_tx | 1 << vf_shift;
                reg_req_rx = reg_cur_rx | 1 << vf_shift;
        } else {
                reg_req_tx = reg_cur_tx & ~(1 << vf_shift);
                reg_req_rx = reg_cur_rx & ~(1 << vf_shift);
        }

        /* The 82599 cannot support a mix of jumbo and non-jumbo PF/VFs.
         * For more info take a look at ixgbe_set_vf_lpe
         */
        if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
                struct net_device *dev = adapter->netdev;
                int pf_max_frame = dev->mtu + ETH_HLEN;

#if IS_ENABLED(CONFIG_FCOE)
                if (dev->fcoe_mtu)
                        pf_max_frame = max_t(int, pf_max_frame,
                                             IXGBE_FCOE_JUMBO_FRAME_SIZE);
#endif /* CONFIG_FCOE */

                if (pf_max_frame > ETH_FRAME_LEN)
                        reg_req_rx = reg_cur_rx & ~(1 << vf_shift);
        }

        /* Enable/Disable particular VF */
        if (reg_cur_tx != reg_req_tx)
                IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), reg_req_tx);
        if (reg_cur_rx != reg_req_rx)
                IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), reg_req_rx);
}

static int ixgbe_vf_reset_msg(struct ixgbe_adapter *adapter, u32 vf)
{
        struct ixgbe_ring_feature *vmdq = &adapter->ring_feature[RING_F_VMDQ];
        struct ixgbe_hw *hw = &adapter->hw;
        unsigned char *vf_mac = adapter->vfinfo[vf].vf_mac_addresses;
        u32 reg, reg_offset, vf_shift;
        u32 msgbuf[4] = {0, 0, 0, 0};
        u8 *addr = (u8 *)(&msgbuf[1]);
        u32 q_per_pool = __ALIGN_MASK(1, ~vmdq->mask);
        int i;

        e_info(probe, "VF Reset msg received from vf %d\n", vf);

        /* reset the filters for the device */
        ixgbe_vf_reset_event(adapter, vf);

        ixgbe_vf_clear_mbx(adapter, vf);

        /* set vf mac address */
        if (!is_zero_ether_addr(vf_mac))
                ixgbe_set_vf_mac(adapter, vf, vf_mac);

        vf_shift = vf % 32;
        reg_offset = vf / 32;

        /* force drop enable for all VF Rx queues */
        reg = IXGBE_QDE_ENABLE;
        if (adapter->vfinfo[vf].pf_vlan)
                reg |= IXGBE_QDE_HIDE_VLAN;

        ixgbe_write_qde(adapter, vf, reg);

        ixgbe_set_vf_rx_tx(adapter, vf);

        /* enable VF mailbox for further messages */
        adapter->vfinfo[vf].clear_to_send = true;

        /* Enable counting of spoofed packets in the SSVPC register */
        reg = IXGBE_READ_REG(hw, IXGBE_VMECM(reg_offset));
        reg |= BIT(vf_shift);
        IXGBE_WRITE_REG(hw, IXGBE_VMECM(reg_offset), reg);

        /*
         * Reset the VFs TDWBAL and TDWBAH registers
         * which are not cleared by an FLR
         */
        for (i = 0; i < q_per_pool; i++) {
                IXGBE_WRITE_REG(hw, IXGBE_PVFTDWBAHn(q_per_pool, vf, i), 0);
                IXGBE_WRITE_REG(hw, IXGBE_PVFTDWBALn(q_per_pool, vf, i), 0);
        }

        /* reply to reset with ack and vf mac address */
        msgbuf[0] = IXGBE_VF_RESET;
        if (!is_zero_ether_addr(vf_mac) && adapter->vfinfo[vf].pf_set_mac) {
                msgbuf[0] |= IXGBE_VT_MSGTYPE_ACK;
                memcpy(addr, vf_mac, ETH_ALEN);
        } else {
                msgbuf[0] |= IXGBE_VT_MSGTYPE_NACK;
        }

        /*
         * Piggyback the multicast filter type so VF can compute the
         * correct vectors
         */
        msgbuf[3] = hw->mac.mc_filter_type;
        ixgbe_write_mbx(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN, vf);

        return 0;
}

static int ixgbe_set_vf_mac_addr(struct ixgbe_adapter *adapter,
                                 u32 *msgbuf, u32 vf)
{
        u8 *new_mac = ((u8 *)(&msgbuf[1]));

        if (!is_valid_ether_addr(new_mac)) {
                e_warn(drv, "VF %d attempted to set invalid mac\n", vf);
                return -1;
        }

        if (adapter->vfinfo[vf].pf_set_mac && !adapter->vfinfo[vf].trusted &&
            !ether_addr_equal(adapter->vfinfo[vf].vf_mac_addresses, new_mac)) {
                e_warn(drv,
                       "VF %d attempted to override administratively set MAC address\n"
                       "Reload the VF driver to resume operations\n",
                       vf);
                return -1;
        }

        return ixgbe_set_vf_mac(adapter, vf, new_mac) < 0;
}

static int ixgbe_set_vf_vlan_msg(struct ixgbe_adapter *adapter,
                                 u32 *msgbuf, u32 vf)
{
        u32 add = FIELD_GET(IXGBE_VT_MSGINFO_MASK, msgbuf[0]);
        u32 vid = (msgbuf[1] & IXGBE_VLVF_VLANID_MASK);
        u8 tcs = adapter->hw_tcs;

        if (adapter->vfinfo[vf].pf_vlan || tcs) {
                e_warn(drv,
                       "VF %d attempted to override administratively set VLAN configuration\n"
                       "Reload the VF driver to resume operations\n",
                       vf);
                return -1;
        }

        /* VLAN 0 is a special case, don't allow it to be removed */
        if (!vid && !add)
                return 0;

        return ixgbe_set_vf_vlan(adapter, add, vid, vf);
}

static int ixgbe_set_vf_macvlan_msg(struct ixgbe_adapter *adapter,
                                    u32 *msgbuf, u32 vf)
{
        u8 *new_mac = ((u8 *)(&msgbuf[1]));
        int index = FIELD_GET(IXGBE_VT_MSGINFO_MASK, msgbuf[0]);
        int err;

        if (adapter->vfinfo[vf].pf_set_mac && !adapter->vfinfo[vf].trusted &&
            index > 0) {
                e_warn(drv,
                       "VF %d requested MACVLAN filter but is administratively denied\n",
                       vf);
                return -1;
        }

        /* An non-zero index indicates the VF is setting a filter */
        if (index) {
                if (!is_valid_ether_addr(new_mac)) {
                        e_warn(drv, "VF %d attempted to set invalid mac\n", vf);
                        return -1;
                }

                /*
                 * If the VF is allowed to set MAC filters then turn off
                 * anti-spoofing to avoid false positives.
                 */
                if (adapter->vfinfo[vf].spoofchk_enabled) {
                        struct ixgbe_hw *hw = &adapter->hw;

                        hw->mac.ops.set_mac_anti_spoofing(hw, false, vf);
                        hw->mac.ops.set_vlan_anti_spoofing(hw, false, vf);
                }
        }

        err = ixgbe_set_vf_macvlan(adapter, vf, index, new_mac);
        if (err == -ENOSPC)
                e_warn(drv,
                       "VF %d has requested a MACVLAN filter but there is no space for it\n",
                       vf);

        return err < 0;
}

static int ixgbe_negotiate_vf_api(struct ixgbe_adapter *adapter,
                                  u32 *msgbuf, u32 vf)
{
        int api = msgbuf[1];

        switch (api) {
        case ixgbe_mbox_api_10:
        case ixgbe_mbox_api_11:
        case ixgbe_mbox_api_12:
        case ixgbe_mbox_api_13:
        case ixgbe_mbox_api_14:
        case ixgbe_mbox_api_16:
        case ixgbe_mbox_api_17:
                adapter->vfinfo[vf].vf_api = api;
                return 0;
        default:
                break;
        }

        e_dbg(drv, "VF %d requested unsupported api version %u\n", vf, api);

        return -1;
}

static int ixgbe_get_vf_queues(struct ixgbe_adapter *adapter,
                               u32 *msgbuf, u32 vf)
{
        struct net_device *dev = adapter->netdev;
        struct ixgbe_ring_feature *vmdq = &adapter->ring_feature[RING_F_VMDQ];
        unsigned int default_tc = 0;
        u8 num_tcs = adapter->hw_tcs;

        /* verify the PF is supporting the correct APIs */
        switch (adapter->vfinfo[vf].vf_api) {
        case ixgbe_mbox_api_20:
        case ixgbe_mbox_api_11:
        case ixgbe_mbox_api_12:
        case ixgbe_mbox_api_13:
        case ixgbe_mbox_api_14:
        case ixgbe_mbox_api_16:
        case ixgbe_mbox_api_17:
                break;
        default:
                return -1;
        }

        /* only allow 1 Tx queue for bandwidth limiting */
        msgbuf[IXGBE_VF_TX_QUEUES] = __ALIGN_MASK(1, ~vmdq->mask);
        msgbuf[IXGBE_VF_RX_QUEUES] = __ALIGN_MASK(1, ~vmdq->mask);

        /* if TCs > 1 determine which TC belongs to default user priority */
        if (num_tcs > 1)
                default_tc = netdev_get_prio_tc_map(dev, adapter->default_up);

        /* notify VF of need for VLAN tag stripping, and correct queue */
        if (num_tcs)
                msgbuf[IXGBE_VF_TRANS_VLAN] = num_tcs;
        else if (adapter->vfinfo[vf].pf_vlan || adapter->vfinfo[vf].pf_qos)
                msgbuf[IXGBE_VF_TRANS_VLAN] = 1;
        else
                msgbuf[IXGBE_VF_TRANS_VLAN] = 0;

        /* notify VF of default queue */
        msgbuf[IXGBE_VF_DEF_QUEUE] = default_tc;

        return 0;
}

static int ixgbe_get_vf_reta(struct ixgbe_adapter *adapter, u32 *msgbuf, u32 vf)
{
        u32 i, j;
        u32 *out_buf = &msgbuf[1];
        const u8 *reta = adapter->rss_indir_tbl;
        u32 reta_size = ixgbe_rss_indir_tbl_entries(adapter);

        /* Check if operation is permitted */
        if (!adapter->vfinfo[vf].rss_query_enabled)
                return -EPERM;

        /* verify the PF is supporting the correct API */
        switch (adapter->vfinfo[vf].vf_api) {
        case ixgbe_mbox_api_17:
        case ixgbe_mbox_api_16:
        case ixgbe_mbox_api_14:
        case ixgbe_mbox_api_13:
        case ixgbe_mbox_api_12:
                break;
        default:
                return -EOPNOTSUPP;
        }

        /* This mailbox command is supported (required) only for 82599 and x540
         * VFs which support up to 4 RSS queues. Therefore we will compress the
         * RETA by saving only 2 bits from each entry. This way we will be able
         * to transfer the whole RETA in a single mailbox operation.
         */
        for (i = 0; i < reta_size / 16; i++) {
                out_buf[i] = 0;
                for (j = 0; j < 16; j++)
                        out_buf[i] |= (u32)(reta[16 * i + j] & 0x3) << (2 * j);
        }

        return 0;
}

static int ixgbe_get_vf_rss_key(struct ixgbe_adapter *adapter,
                                u32 *msgbuf, u32 vf)
{
        u32 *rss_key = &msgbuf[1];

        /* Check if the operation is permitted */
        if (!adapter->vfinfo[vf].rss_query_enabled)
                return -EPERM;

        /* verify the PF is supporting the correct API */
        switch (adapter->vfinfo[vf].vf_api) {
        case ixgbe_mbox_api_17:
        case ixgbe_mbox_api_16:
        case ixgbe_mbox_api_14:
        case ixgbe_mbox_api_13:
        case ixgbe_mbox_api_12:
                break;
        default:
                return -EOPNOTSUPP;
        }

        memcpy(rss_key, adapter->rss_key, IXGBE_RSS_KEY_SIZE);

        return 0;
}

static int ixgbe_update_vf_xcast_mode(struct ixgbe_adapter *adapter,
                                      u32 *msgbuf, u32 vf)
{
        struct ixgbe_hw *hw = &adapter->hw;
        int xcast_mode = msgbuf[1];
        u32 vmolr, fctrl, disable, enable;

        /* verify the PF is supporting the correct APIs */
        switch (adapter->vfinfo[vf].vf_api) {
        case ixgbe_mbox_api_12:
                /* promisc introduced in 1.3 version */
                if (xcast_mode == IXGBEVF_XCAST_MODE_PROMISC)
                        return -EOPNOTSUPP;
                fallthrough;
        case ixgbe_mbox_api_13:
        case ixgbe_mbox_api_14:
        case ixgbe_mbox_api_16:
        case ixgbe_mbox_api_17:
                break;
        default:
                return -EOPNOTSUPP;
        }

        if (xcast_mode > IXGBEVF_XCAST_MODE_MULTI &&
            !adapter->vfinfo[vf].trusted) {
                xcast_mode = IXGBEVF_XCAST_MODE_MULTI;
        }

        if (adapter->vfinfo[vf].xcast_mode == xcast_mode)
                goto out;

        switch (xcast_mode) {
        case IXGBEVF_XCAST_MODE_NONE:
                disable = IXGBE_VMOLR_ROMPE |
                          IXGBE_VMOLR_MPE | IXGBE_VMOLR_UPE | IXGBE_VMOLR_VPE;
                enable = IXGBE_VMOLR_BAM;
                break;
        case IXGBEVF_XCAST_MODE_MULTI:
                disable = IXGBE_VMOLR_MPE | IXGBE_VMOLR_UPE | IXGBE_VMOLR_VPE;
                enable = IXGBE_VMOLR_BAM | IXGBE_VMOLR_ROMPE;
                break;
        case IXGBEVF_XCAST_MODE_ALLMULTI:
                disable = IXGBE_VMOLR_UPE | IXGBE_VMOLR_VPE;
                enable = IXGBE_VMOLR_BAM | IXGBE_VMOLR_ROMPE | IXGBE_VMOLR_MPE;
                break;
        case IXGBEVF_XCAST_MODE_PROMISC:
                if (hw->mac.type <= ixgbe_mac_82599EB)
                        return -EOPNOTSUPP;

                fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
                if (!(fctrl & IXGBE_FCTRL_UPE)) {
                        /* VF promisc requires PF in promisc */
                        e_warn(drv,
                               "Enabling VF promisc requires PF in promisc\n");
                        return -EPERM;
                }

                disable = IXGBE_VMOLR_VPE;
                enable = IXGBE_VMOLR_BAM | IXGBE_VMOLR_ROMPE |
                         IXGBE_VMOLR_MPE | IXGBE_VMOLR_UPE;
                break;
        default:
                return -EOPNOTSUPP;
        }

        vmolr = IXGBE_READ_REG(hw, IXGBE_VMOLR(vf));
        vmolr &= ~disable;
        vmolr |= enable;
        IXGBE_WRITE_REG(hw, IXGBE_VMOLR(vf), vmolr);

        adapter->vfinfo[vf].xcast_mode = xcast_mode;

out:
        msgbuf[1] = xcast_mode;

        return 0;
}

static int ixgbe_get_vf_link_state(struct ixgbe_adapter *adapter,
                                   u32 *msgbuf, u32 vf)
{
        u32 *link_state = &msgbuf[1];

        /* verify the PF is supporting the correct API */
        switch (adapter->vfinfo[vf].vf_api) {
        case ixgbe_mbox_api_12:
        case ixgbe_mbox_api_13:
        case ixgbe_mbox_api_14:
        case ixgbe_mbox_api_16:
        case ixgbe_mbox_api_17:
                break;
        default:
                return -EOPNOTSUPP;
        }

        *link_state = adapter->vfinfo[vf].link_enable;

        return 0;
}

/**
 * ixgbe_send_vf_link_status - send link status data to VF
 * @adapter: pointer to adapter struct
 * @msgbuf: pointer to message buffers
 * @vf: VF identifier
 *
 * Reply for IXGBE_VF_GET_PF_LINK_STATE mbox command sending link status data.
 *
 * Return: 0 on success or -EOPNOTSUPP when operation is not supported.
 */
static int ixgbe_send_vf_link_status(struct ixgbe_adapter *adapter,
                                     u32 *msgbuf, u32 vf)
{
        struct ixgbe_hw *hw = &adapter->hw;

        switch (adapter->vfinfo[vf].vf_api) {
        case ixgbe_mbox_api_16:
        case ixgbe_mbox_api_17:
                if (hw->mac.type != ixgbe_mac_e610)
                        return -EOPNOTSUPP;
                break;
        default:
                return -EOPNOTSUPP;
        }
        /* Simply provide stored values as watchdog & link status events take
         * care of its freshness.
         */
        msgbuf[1] = adapter->link_speed;
        msgbuf[2] = adapter->link_up;

        return 0;
}

/**
 * ixgbe_negotiate_vf_features -  negotiate supported features with VF driver
 * @adapter: pointer to adapter struct
 * @msgbuf: pointer to message buffers
 * @vf: VF identifier
 *
 * Return: 0 on success or -EOPNOTSUPP when operation is not supported.
 */
static int ixgbe_negotiate_vf_features(struct ixgbe_adapter *adapter,
                                       u32 *msgbuf, u32 vf)
{
        u32 features = msgbuf[1];

        switch (adapter->vfinfo[vf].vf_api) {
        case ixgbe_mbox_api_17:
                break;
        default:
                return -EOPNOTSUPP;
        }

        features &= IXGBE_SUPPORTED_FEATURES;
        msgbuf[1] = features;

        return 0;
}

static int ixgbe_rcv_msg_from_vf(struct ixgbe_adapter *adapter, u32 vf)
{
        u32 mbx_size = IXGBE_VFMAILBOX_SIZE;
        u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
        struct ixgbe_hw *hw = &adapter->hw;
        int retval;

        retval = ixgbe_read_mbx(hw, msgbuf, mbx_size, vf);

        if (retval) {
                pr_err("Error receiving message from VF\n");
                return retval;
        }

        /* this is a message we already processed, do nothing */
        if (msgbuf[0] & (IXGBE_VT_MSGTYPE_ACK | IXGBE_VT_MSGTYPE_NACK))
                return 0;

        /* flush the ack before we write any messages back */
        IXGBE_WRITE_FLUSH(hw);

        if (msgbuf[0] == IXGBE_VF_RESET)
                return ixgbe_vf_reset_msg(adapter, vf);

        /*
         * until the vf completes a virtual function reset it should not be
         * allowed to start any configuration.
         */
        if (!adapter->vfinfo[vf].clear_to_send) {
                msgbuf[0] |= IXGBE_VT_MSGTYPE_NACK;
                ixgbe_write_mbx(hw, msgbuf, 1, vf);
                return 0;
        }

        switch ((msgbuf[0] & 0xFFFF)) {
        case IXGBE_VF_SET_MAC_ADDR:
                retval = ixgbe_set_vf_mac_addr(adapter, msgbuf, vf);
                break;
        case IXGBE_VF_SET_MULTICAST:
                retval = ixgbe_set_vf_multicasts(adapter, msgbuf, vf);
                break;
        case IXGBE_VF_SET_VLAN:
                retval = ixgbe_set_vf_vlan_msg(adapter, msgbuf, vf);
                break;
        case IXGBE_VF_SET_LPE:
                retval = ixgbe_set_vf_lpe(adapter, msgbuf[1], vf);
                break;
        case IXGBE_VF_SET_MACVLAN:
                retval = ixgbe_set_vf_macvlan_msg(adapter, msgbuf, vf);
                break;
        case IXGBE_VF_API_NEGOTIATE:
                retval = ixgbe_negotiate_vf_api(adapter, msgbuf, vf);
                break;
        case IXGBE_VF_GET_QUEUES:
                retval = ixgbe_get_vf_queues(adapter, msgbuf, vf);
                break;
        case IXGBE_VF_GET_RETA:
                retval = ixgbe_get_vf_reta(adapter, msgbuf, vf);
                break;
        case IXGBE_VF_GET_RSS_KEY:
                retval = ixgbe_get_vf_rss_key(adapter, msgbuf, vf);
                break;
        case IXGBE_VF_UPDATE_XCAST_MODE:
                retval = ixgbe_update_vf_xcast_mode(adapter, msgbuf, vf);
                break;
        case IXGBE_VF_GET_LINK_STATE:
                retval = ixgbe_get_vf_link_state(adapter, msgbuf, vf);
                break;
        case IXGBE_VF_IPSEC_ADD:
                retval = ixgbe_ipsec_vf_add_sa(adapter, msgbuf, vf);
                break;
        case IXGBE_VF_IPSEC_DEL:
                retval = ixgbe_ipsec_vf_del_sa(adapter, msgbuf, vf);
                break;
        case IXGBE_VF_GET_PF_LINK_STATE:
                retval = ixgbe_send_vf_link_status(adapter, msgbuf, vf);
                break;
        case IXGBE_VF_FEATURES_NEGOTIATE:
                retval = ixgbe_negotiate_vf_features(adapter, msgbuf, vf);
                break;
        default:
                e_err(drv, "Unhandled Msg %8.8x\n", msgbuf[0]);
                retval = -EIO;
                break;
        }

        /* notify the VF of the results of what it sent us */
        if (retval)
                msgbuf[0] |= IXGBE_VT_MSGTYPE_NACK;
        else
                msgbuf[0] |= IXGBE_VT_MSGTYPE_ACK;

        msgbuf[0] |= IXGBE_VT_MSGTYPE_CTS;

        ixgbe_write_mbx(hw, msgbuf, mbx_size, vf);

        return retval;
}

static void ixgbe_rcv_ack_from_vf(struct ixgbe_adapter *adapter, u32 vf)
{
        struct ixgbe_hw *hw = &adapter->hw;
        u32 msg = IXGBE_VT_MSGTYPE_NACK;

        /* if device isn't clear to send it shouldn't be reading either */
        if (!adapter->vfinfo[vf].clear_to_send)
                ixgbe_write_mbx(hw, &msg, 1, vf);
}

/**
 * ixgbe_check_mdd_event - check for MDD event on all VFs
 * @adapter: pointer to ixgbe adapter
 *
 * Return: true if there is a VF on which MDD event occurred, false otherwise.
 */
bool ixgbe_check_mdd_event(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        DECLARE_BITMAP(vf_bitmap, 64);
        bool ret = false;
        int i;

        if (!hw->mac.ops.handle_mdd)
                return false;

        /* Did we have a malicious event */
        bitmap_zero(vf_bitmap, 64);
        hw->mac.ops.handle_mdd(hw, vf_bitmap);

        /* Log any blocked queues and release lock */
        for_each_set_bit(i, vf_bitmap, 64) {
                dev_warn(&adapter->pdev->dev,
                         "Malicious event on VF %d tx:%x rx:%x\n", i,
                         IXGBE_READ_REG(hw, IXGBE_LVMMC_TX),
                         IXGBE_READ_REG(hw, IXGBE_LVMMC_RX));

                if (hw->mac.ops.restore_mdd_vf) {
                        u32 ping;

                        hw->mac.ops.restore_mdd_vf(hw, i);

                        /* get the VF to rebuild its queues */
                        adapter->vfinfo[i].clear_to_send = 0;
                        ping = IXGBE_PF_CONTROL_MSG |
                               IXGBE_VT_MSGTYPE_CTS;
                        ixgbe_write_mbx(hw, &ping, 1, i);
                }

                ret = true;
        }

        return ret;
}

void ixgbe_msg_task(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        unsigned long flags;
        u32 vf;

        ixgbe_check_mdd_event(adapter);

        spin_lock_irqsave(&adapter->vfs_lock, flags);
        for (vf = 0; vf < adapter->num_vfs; vf++) {
                /* process any reset requests */
                if (!ixgbe_check_for_rst(hw, vf))
                        ixgbe_vf_reset_event(adapter, vf);

                /* process any messages pending */
                if (!ixgbe_check_for_msg(hw, vf))
                        ixgbe_rcv_msg_from_vf(adapter, vf);

                /* process any acks */
                if (!ixgbe_check_for_ack(hw, vf))
                        ixgbe_rcv_ack_from_vf(adapter, vf);
        }
        spin_unlock_irqrestore(&adapter->vfs_lock, flags);
}

static inline void ixgbe_ping_vf(struct ixgbe_adapter *adapter, int vf)
{
        struct ixgbe_hw *hw = &adapter->hw;
        u32 ping;

        ping = IXGBE_PF_CONTROL_MSG;
        if (adapter->vfinfo[vf].clear_to_send)
                ping |= IXGBE_VT_MSGTYPE_CTS;
        ixgbe_write_mbx(hw, &ping, 1, vf);
}

void ixgbe_ping_all_vfs(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        u32 ping;
        int i;

        for (i = 0 ; i < adapter->num_vfs; i++) {
                ping = IXGBE_PF_CONTROL_MSG;
                if (adapter->vfinfo[i].clear_to_send)
                        ping |= IXGBE_VT_MSGTYPE_CTS;
                ixgbe_write_mbx(hw, &ping, 1, i);
        }
}

/**
 * ixgbe_set_all_vfs - update vfs queues
 * @adapter: Pointer to adapter struct
 *
 * Update setting transmit and receive queues for all vfs
 **/
void ixgbe_set_all_vfs(struct ixgbe_adapter *adapter)
{
        int i;

        for (i = 0 ; i < adapter->num_vfs; i++)
                ixgbe_set_vf_link_state(adapter, i,
                                        adapter->vfinfo[i].link_state);
}

int ixgbe_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
{
        struct ixgbe_adapter *adapter = ixgbe_from_netdev(netdev);
        int retval;

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

        if (is_valid_ether_addr(mac)) {
                dev_info(&adapter->pdev->dev, "setting MAC %pM on VF %d\n",
                         mac, vf);
                dev_info(&adapter->pdev->dev, "Reload the VF driver to make this change effective.");

                retval = ixgbe_set_vf_mac(adapter, vf, mac);
                if (retval >= 0) {
                        adapter->vfinfo[vf].pf_set_mac = true;

                        if (test_bit(__IXGBE_DOWN, &adapter->state)) {
                                dev_warn(&adapter->pdev->dev, "The VF MAC address has been set, but the PF device is not up.\n");
                                dev_warn(&adapter->pdev->dev, "Bring the PF device up before attempting to use the VF device.\n");
                        }
                } else {
                        dev_warn(&adapter->pdev->dev, "The VF MAC address was NOT set due to invalid or duplicate MAC address.\n");
                }
        } else if (is_zero_ether_addr(mac)) {
                unsigned char *vf_mac_addr =
                                           adapter->vfinfo[vf].vf_mac_addresses;

                /* nothing to do */
                if (is_zero_ether_addr(vf_mac_addr))
                        return 0;

                dev_info(&adapter->pdev->dev, "removing MAC on VF %d\n", vf);

                retval = ixgbe_del_mac_filter(adapter, vf_mac_addr, vf);
                if (retval >= 0) {
                        adapter->vfinfo[vf].pf_set_mac = false;
                        memcpy(vf_mac_addr, mac, ETH_ALEN);
                } else {
                        dev_warn(&adapter->pdev->dev, "Could NOT remove the VF MAC address.\n");
                }
        } else {
                retval = -EINVAL;
        }

        return retval;
}

static int ixgbe_enable_port_vlan(struct ixgbe_adapter *adapter, int vf,
                                  u16 vlan, u8 qos)
{
        struct ixgbe_hw *hw = &adapter->hw;
        int err;

        err = ixgbe_set_vf_vlan(adapter, true, vlan, vf);
        if (err)
                goto out;

        /* Revoke tagless access via VLAN 0 */
        ixgbe_set_vf_vlan(adapter, false, 0, vf);

        ixgbe_set_vmvir(adapter, vlan, qos, vf);
        ixgbe_set_vmolr(hw, vf, false);

        /* enable hide vlan on X550 */
        if (hw->mac.type >= ixgbe_mac_X550)
                ixgbe_write_qde(adapter, vf, IXGBE_QDE_ENABLE |
                                IXGBE_QDE_HIDE_VLAN);

        adapter->vfinfo[vf].pf_vlan = vlan;
        adapter->vfinfo[vf].pf_qos = qos;
        dev_info(&adapter->pdev->dev,
                 "Setting VLAN %d, QOS 0x%x on VF %d\n", vlan, qos, vf);
        if (test_bit(__IXGBE_DOWN, &adapter->state)) {
                dev_warn(&adapter->pdev->dev,
                         "The VF VLAN has been set, but the PF device is not up.\n");
                dev_warn(&adapter->pdev->dev,
                         "Bring the PF device up before attempting to use the VF device.\n");
        }

out:
        return err;
}

static int ixgbe_disable_port_vlan(struct ixgbe_adapter *adapter, int vf)
{
        struct ixgbe_hw *hw = &adapter->hw;
        int err;

        err = ixgbe_set_vf_vlan(adapter, false,
                                adapter->vfinfo[vf].pf_vlan, vf);
        /* Restore tagless access via VLAN 0 */
        ixgbe_set_vf_vlan(adapter, true, 0, vf);
        ixgbe_clear_vmvir(adapter, vf);
        ixgbe_set_vmolr(hw, vf, true);

        /* disable hide VLAN on X550 */
        if (hw->mac.type >= ixgbe_mac_X550)
                ixgbe_write_qde(adapter, vf, IXGBE_QDE_ENABLE);

        adapter->vfinfo[vf].pf_vlan = 0;
        adapter->vfinfo[vf].pf_qos = 0;

        return err;
}

int ixgbe_ndo_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan,
                          u8 qos, __be16 vlan_proto)
{
        int err = 0;
        struct ixgbe_adapter *adapter = ixgbe_from_netdev(netdev);

        if ((vf >= adapter->num_vfs) || (vlan > 4095) || (qos > 7))
                return -EINVAL;
        if (vlan_proto != htons(ETH_P_8021Q))
                return -EPROTONOSUPPORT;
        if (vlan || qos) {
                /* Check if there is already a port VLAN set, if so
                 * we have to delete the old one first before we
                 * can set the new one.  The usage model had
                 * previously assumed the user would delete the
                 * old port VLAN before setting a new one but this
                 * is not necessarily the case.
                 */
                if (adapter->vfinfo[vf].pf_vlan)
                        err = ixgbe_disable_port_vlan(adapter, vf);
                if (err)
                        goto out;
                err = ixgbe_enable_port_vlan(adapter, vf, vlan, qos);
        } else {
                err = ixgbe_disable_port_vlan(adapter, vf);
        }

out:
        return err;
}

int ixgbe_link_mbps(struct ixgbe_adapter *adapter)
{
        switch (adapter->link_speed) {
        case IXGBE_LINK_SPEED_100_FULL:
                return 100;
        case IXGBE_LINK_SPEED_1GB_FULL:
                return 1000;
        case IXGBE_LINK_SPEED_10GB_FULL:
                return 10000;
        default:
                return 0;
        }
}

static void ixgbe_set_vf_rate_limit(struct ixgbe_adapter *adapter, int vf)
{
        struct ixgbe_ring_feature *vmdq = &adapter->ring_feature[RING_F_VMDQ];
        struct ixgbe_hw *hw = &adapter->hw;
        u32 bcnrc_val = 0;
        u16 queue, queues_per_pool;
        u16 tx_rate = adapter->vfinfo[vf].tx_rate;

        if (tx_rate) {
                /* start with base link speed value */
                bcnrc_val = adapter->vf_rate_link_speed;

                /* Calculate the rate factor values to set */
                bcnrc_val <<= IXGBE_RTTBCNRC_RF_INT_SHIFT;
                bcnrc_val /= tx_rate;

                /* clear everything but the rate factor */
                bcnrc_val &= IXGBE_RTTBCNRC_RF_INT_MASK |
                             IXGBE_RTTBCNRC_RF_DEC_MASK;

                /* enable the rate scheduler */
                bcnrc_val |= IXGBE_RTTBCNRC_RS_ENA;
        }

        /*
         * Set global transmit compensation time to the MMW_SIZE in RTTBCNRM
         * register. Typically MMW_SIZE=0x014 if 9728-byte jumbo is supported
         * and 0x004 otherwise.
         */
        switch (hw->mac.type) {
        case ixgbe_mac_82599EB:
                IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRM, 0x4);
                break;
        case ixgbe_mac_X540:
                IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRM, 0x14);
                break;
        default:
                break;
        }

        /* determine how many queues per pool based on VMDq mask */
        queues_per_pool = __ALIGN_MASK(1, ~vmdq->mask);

        /* write value for all Tx queues belonging to VF */
        for (queue = 0; queue < queues_per_pool; queue++) {
                unsigned int reg_idx = (vf * queues_per_pool) + queue;

                IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, reg_idx);
                IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRC, bcnrc_val);
        }
}

void ixgbe_check_vf_rate_limit(struct ixgbe_adapter *adapter)
{
        int i;

        /* VF Tx rate limit was not set */
        if (!adapter->vf_rate_link_speed)
                return;

        if (ixgbe_link_mbps(adapter) != adapter->vf_rate_link_speed) {
                adapter->vf_rate_link_speed = 0;
                dev_info(&adapter->pdev->dev,
                         "Link speed has been changed. VF Transmit rate is disabled\n");
        }

        for (i = 0; i < adapter->num_vfs; i++) {
                if (!adapter->vf_rate_link_speed)
                        adapter->vfinfo[i].tx_rate = 0;

                ixgbe_set_vf_rate_limit(adapter, i);
        }
}

int ixgbe_ndo_set_vf_bw(struct net_device *netdev, int vf, int min_tx_rate,
                        int max_tx_rate)
{
        struct ixgbe_adapter *adapter = ixgbe_from_netdev(netdev);
        int link_speed;

        /* verify VF is active */
        if (vf >= adapter->num_vfs)
                return -EINVAL;

        /* verify link is up */
        if (!adapter->link_up)
                return -EINVAL;

        /* verify we are linked at 10Gbps */
        link_speed = ixgbe_link_mbps(adapter);
        if (link_speed != 10000)
                return -EINVAL;

        if (min_tx_rate)
                return -EINVAL;

        /* rate limit cannot be less than 10Mbs or greater than link speed */
        if (max_tx_rate && ((max_tx_rate <= 10) || (max_tx_rate > link_speed)))
                return -EINVAL;

        /* store values */
        adapter->vf_rate_link_speed = link_speed;
        adapter->vfinfo[vf].tx_rate = max_tx_rate;

        /* update hardware configuration */
        ixgbe_set_vf_rate_limit(adapter, vf);

        return 0;
}

int ixgbe_ndo_set_vf_spoofchk(struct net_device *netdev, int vf, bool setting)
{
        struct ixgbe_adapter *adapter = ixgbe_from_netdev(netdev);
        struct ixgbe_hw *hw = &adapter->hw;

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

        adapter->vfinfo[vf].spoofchk_enabled = setting;

        /* configure MAC spoofing */
        hw->mac.ops.set_mac_anti_spoofing(hw, setting, vf);

        /* configure VLAN spoofing */
        hw->mac.ops.set_vlan_anti_spoofing(hw, setting, vf);

        /* Ensure LLDP and FC is set for Ethertype Antispoofing if we will be
         * calling set_ethertype_anti_spoofing for each VF in loop below
         */
        if (hw->mac.ops.set_ethertype_anti_spoofing) {
                IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_LLDP),
                                (IXGBE_ETQF_FILTER_EN    |
                                 IXGBE_ETQF_TX_ANTISPOOF |
                                 ETH_P_LLDP));

                IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FC),
                                (IXGBE_ETQF_FILTER_EN |
                                 IXGBE_ETQF_TX_ANTISPOOF |
                                 ETH_P_PAUSE));

                hw->mac.ops.set_ethertype_anti_spoofing(hw, setting, vf);
        }

        return 0;
}

/**
 * ixgbe_set_vf_link_state - Set link state
 * @adapter: Pointer to adapter struct
 * @vf: VF identifier
 * @state: required link state
 *
 * Set a link force state on/off a single vf
 **/
void ixgbe_set_vf_link_state(struct ixgbe_adapter *adapter, int vf, int state)
{
        adapter->vfinfo[vf].link_state = state;

        switch (state) {
        case IFLA_VF_LINK_STATE_AUTO:
                if (test_bit(__IXGBE_DOWN, &adapter->state))
                        adapter->vfinfo[vf].link_enable = false;
                else
                        adapter->vfinfo[vf].link_enable = true;
                break;
        case IFLA_VF_LINK_STATE_ENABLE:
                adapter->vfinfo[vf].link_enable = true;
                break;
        case IFLA_VF_LINK_STATE_DISABLE:
                adapter->vfinfo[vf].link_enable = false;
                break;
        }

        ixgbe_set_vf_rx_tx(adapter, vf);

        /* restart the VF */
        adapter->vfinfo[vf].clear_to_send = false;
        ixgbe_ping_vf(adapter, vf);
}

/**
 * ixgbe_ndo_set_vf_link_state - Set link state
 * @netdev: network interface device structure
 * @vf: VF identifier
 * @state: required link state
 *
 * Set the link state of a specified VF, regardless of physical link state
 **/
int ixgbe_ndo_set_vf_link_state(struct net_device *netdev, int vf, int state)
{
        struct ixgbe_adapter *adapter = ixgbe_from_netdev(netdev);
        int ret = 0;

        if (vf < 0 || vf >= adapter->num_vfs) {
                dev_err(&adapter->pdev->dev,
                        "NDO set VF link - invalid VF identifier %d\n", vf);
                return -EINVAL;
        }

        switch (state) {
        case IFLA_VF_LINK_STATE_ENABLE:
                dev_info(&adapter->pdev->dev,
                         "NDO set VF %d link state %d - not supported\n",
                        vf, state);
                break;
        case IFLA_VF_LINK_STATE_DISABLE:
                dev_info(&adapter->pdev->dev,
                         "NDO set VF %d link state disable\n", vf);
                ixgbe_set_vf_link_state(adapter, vf, state);
                break;
        case IFLA_VF_LINK_STATE_AUTO:
                dev_info(&adapter->pdev->dev,
                         "NDO set VF %d link state auto\n", vf);
                ixgbe_set_vf_link_state(adapter, vf, state);
                break;
        default:
                dev_err(&adapter->pdev->dev,
                        "NDO set VF %d - invalid link state %d\n", vf, state);
                ret = -EINVAL;
        }

        return ret;
}

int ixgbe_ndo_set_vf_rss_query_en(struct net_device *netdev, int vf,
                                  bool setting)
{
        struct ixgbe_adapter *adapter = ixgbe_from_netdev(netdev);

        /* This operation is currently supported only for 82599 and x540
         * devices.
         */
        if (adapter->hw.mac.type < ixgbe_mac_82599EB ||
            adapter->hw.mac.type >= ixgbe_mac_X550)
                return -EOPNOTSUPP;

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

        adapter->vfinfo[vf].rss_query_enabled = setting;

        return 0;
}

int ixgbe_ndo_set_vf_trust(struct net_device *netdev, int vf, bool setting)
{
        struct ixgbe_adapter *adapter = ixgbe_from_netdev(netdev);

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

        /* nothing to do */
        if (adapter->vfinfo[vf].trusted == setting)
                return 0;

        adapter->vfinfo[vf].trusted = setting;

        /* reset VF to reconfigure features */
        adapter->vfinfo[vf].clear_to_send = false;
        ixgbe_ping_vf(adapter, vf);

        e_info(drv, "VF %u is %strusted\n", vf, setting ? "" : "not ");

        return 0;
}

int ixgbe_ndo_get_vf_config(struct net_device *netdev,
                            int vf, struct ifla_vf_info *ivi)
{
        struct ixgbe_adapter *adapter = ixgbe_from_netdev(netdev);
        if (vf >= adapter->num_vfs)
                return -EINVAL;
        ivi->vf = vf;
        memcpy(&ivi->mac, adapter->vfinfo[vf].vf_mac_addresses, ETH_ALEN);
        ivi->max_tx_rate = adapter->vfinfo[vf].tx_rate;
        ivi->min_tx_rate = 0;
        ivi->vlan = adapter->vfinfo[vf].pf_vlan;
        ivi->qos = adapter->vfinfo[vf].pf_qos;
        ivi->spoofchk = adapter->vfinfo[vf].spoofchk_enabled;
        ivi->rss_query_en = adapter->vfinfo[vf].rss_query_enabled;
        ivi->trusted = adapter->vfinfo[vf].trusted;
        ivi->linkstate = adapter->vfinfo[vf].link_state;
        return 0;
}