/*******************************************************************************
 *
 * Intel Ethernet Controller XL710 Family Linux Driver
 * Copyright(c) 2013 - 2016 Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * The full GNU General Public License is included in this distribution in
 * the file called "COPYING".
 *
 * Contact Information:
 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 ******************************************************************************/

#include "i40e.h"

/*********************notification routines***********************/

/**
 * i40e_vc_vf_broadcast
 * @pf: pointer to the PF structure
 * @opcode: operation code
 * @retval: return value
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * send a message to all VFs on a given PF
 **/
static void i40e_vc_vf_broadcast(struct i40e_pf *pf,
                                 enum virtchnl_ops v_opcode,
                                 i40e_status v_retval, u8 *msg,
                                 u16 msglen)
{
        struct i40e_hw *hw = &pf->hw;
        struct i40e_vf *vf = pf->vf;
        int i;

        for (i = 0; i < pf->num_alloc_vfs; i++, vf++) {
                int abs_vf_id = vf->vf_id + (int)hw->func_caps.vf_base_id;
                /* Not all vfs are enabled so skip the ones that are not */
                if (!test_bit(I40E_VF_STATE_INIT, &vf->vf_states) &&
                    !test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states))
                        continue;

                /* Ignore return value on purpose - a given VF may fail, but
                 * we need to keep going and send to all of them
                 */
                i40e_aq_send_msg_to_vf(hw, abs_vf_id, v_opcode, v_retval,
                                       msg, msglen, NULL);
        }
}

/**
 * i40e_vc_notify_vf_link_state
 * @vf: pointer to the VF structure
 *
 * send a link status message to a single VF
 **/
static void i40e_vc_notify_vf_link_state(struct i40e_vf *vf)
{
        struct virtchnl_pf_event pfe;
        struct i40e_pf *pf = vf->pf;
        struct i40e_hw *hw = &pf->hw;
        struct i40e_link_status *ls = &pf->hw.phy.link_info;
        int abs_vf_id = vf->vf_id + (int)hw->func_caps.vf_base_id;

        pfe.event = VIRTCHNL_EVENT_LINK_CHANGE;
        pfe.severity = PF_EVENT_SEVERITY_INFO;
        if (vf->link_forced) {
                pfe.event_data.link_event.link_status = vf->link_up;
                pfe.event_data.link_event.link_speed =
                        (vf->link_up ? I40E_LINK_SPEED_40GB : 0);
        } else {
                pfe.event_data.link_event.link_status =
                        ls->link_info & I40E_AQ_LINK_UP;
                pfe.event_data.link_event.link_speed =
                        (enum virtchnl_link_speed)ls->link_speed;
        }
        i40e_aq_send_msg_to_vf(hw, abs_vf_id, VIRTCHNL_OP_EVENT,
                               0, (u8 *)&pfe, sizeof(pfe), NULL);
}

/**
 * i40e_vc_notify_link_state
 * @pf: pointer to the PF structure
 *
 * send a link status message to all VFs on a given PF
 **/
void i40e_vc_notify_link_state(struct i40e_pf *pf)
{
        int i;

        for (i = 0; i < pf->num_alloc_vfs; i++)
                i40e_vc_notify_vf_link_state(&pf->vf[i]);
}

/**
 * i40e_vc_notify_reset
 * @pf: pointer to the PF structure
 *
 * indicate a pending reset to all VFs on a given PF
 **/
void i40e_vc_notify_reset(struct i40e_pf *pf)
{
        struct virtchnl_pf_event pfe;

        pfe.event = VIRTCHNL_EVENT_RESET_IMPENDING;
        pfe.severity = PF_EVENT_SEVERITY_CERTAIN_DOOM;
        i40e_vc_vf_broadcast(pf, VIRTCHNL_OP_EVENT, 0,
                             (u8 *)&pfe, sizeof(struct virtchnl_pf_event));
}

/**
 * i40e_vc_notify_vf_reset
 * @vf: pointer to the VF structure
 *
 * indicate a pending reset to the given VF
 **/
void i40e_vc_notify_vf_reset(struct i40e_vf *vf)
{
        struct virtchnl_pf_event pfe;
        int abs_vf_id;

        /* validate the request */
        if (!vf || vf->vf_id >= vf->pf->num_alloc_vfs)
                return;

        /* verify if the VF is in either init or active before proceeding */
        if (!test_bit(I40E_VF_STATE_INIT, &vf->vf_states) &&
            !test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states))
                return;

        abs_vf_id = vf->vf_id + (int)vf->pf->hw.func_caps.vf_base_id;

        pfe.event = VIRTCHNL_EVENT_RESET_IMPENDING;
        pfe.severity = PF_EVENT_SEVERITY_CERTAIN_DOOM;
        i40e_aq_send_msg_to_vf(&vf->pf->hw, abs_vf_id, VIRTCHNL_OP_EVENT,
                               0, (u8 *)&pfe,
                               sizeof(struct virtchnl_pf_event), NULL);
}
/***********************misc routines*****************************/

/**
 * i40e_vc_disable_vf
 * @pf: pointer to the PF info
 * @vf: pointer to the VF info
 *
 * Disable the VF through a SW reset
 **/
static inline void i40e_vc_disable_vf(struct i40e_pf *pf, struct i40e_vf *vf)
{
        i40e_vc_notify_vf_reset(vf);
        i40e_reset_vf(vf, false);
}

/**
 * i40e_vc_isvalid_vsi_id
 * @vf: pointer to the VF info
 * @vsi_id: VF relative VSI id
 *
 * check for the valid VSI id
 **/
static inline bool i40e_vc_isvalid_vsi_id(struct i40e_vf *vf, u16 vsi_id)
{
        struct i40e_pf *pf = vf->pf;
        struct i40e_vsi *vsi = i40e_find_vsi_from_id(pf, vsi_id);

        return (vsi && (vsi->vf_id == vf->vf_id));
}

/**
 * i40e_vc_isvalid_queue_id
 * @vf: pointer to the VF info
 * @vsi_id: vsi id
 * @qid: vsi relative queue id
 *
 * check for the valid queue id
 **/
static inline bool i40e_vc_isvalid_queue_id(struct i40e_vf *vf, u16 vsi_id,
                                            u8 qid)
{
        struct i40e_pf *pf = vf->pf;
        struct i40e_vsi *vsi = i40e_find_vsi_from_id(pf, vsi_id);

        return (vsi && (qid < vsi->alloc_queue_pairs));
}

/**
 * i40e_vc_isvalid_vector_id
 * @vf: pointer to the VF info
 * @vector_id: VF relative vector id
 *
 * check for the valid vector id
 **/
static inline bool i40e_vc_isvalid_vector_id(struct i40e_vf *vf, u8 vector_id)
{
        struct i40e_pf *pf = vf->pf;

        return vector_id < pf->hw.func_caps.num_msix_vectors_vf;
}

/***********************vf resource mgmt routines*****************/

/**
 * i40e_vc_get_pf_queue_id
 * @vf: pointer to the VF info
 * @vsi_id: id of VSI as provided by the FW
 * @vsi_queue_id: vsi relative queue id
 *
 * return PF relative queue id
 **/
static u16 i40e_vc_get_pf_queue_id(struct i40e_vf *vf, u16 vsi_id,
                                   u8 vsi_queue_id)
{
        struct i40e_pf *pf = vf->pf;
        struct i40e_vsi *vsi = i40e_find_vsi_from_id(pf, vsi_id);
        u16 pf_queue_id = I40E_QUEUE_END_OF_LIST;

        if (!vsi)
                return pf_queue_id;

        if (le16_to_cpu(vsi->info.mapping_flags) &
            I40E_AQ_VSI_QUE_MAP_NONCONTIG)
                pf_queue_id =
                        le16_to_cpu(vsi->info.queue_mapping[vsi_queue_id]);
        else
                pf_queue_id = le16_to_cpu(vsi->info.queue_mapping[0]) +
                              vsi_queue_id;

        return pf_queue_id;
}

/**
 * i40e_config_irq_link_list
 * @vf: pointer to the VF info
 * @vsi_id: id of VSI as given by the FW
 * @vecmap: irq map info
 *
 * configure irq link list from the map
 **/
static void i40e_config_irq_link_list(struct i40e_vf *vf, u16 vsi_id,
                                      struct virtchnl_vector_map *vecmap)
{
        unsigned long linklistmap = 0, tempmap;
        struct i40e_pf *pf = vf->pf;
        struct i40e_hw *hw = &pf->hw;
        u16 vsi_queue_id, pf_queue_id;
        enum i40e_queue_type qtype;
        u16 next_q, vector_id;
        u32 reg, reg_idx;
        u16 itr_idx = 0;

        vector_id = vecmap->vector_id;
        /* setup the head */
        if (0 == vector_id)
                reg_idx = I40E_VPINT_LNKLST0(vf->vf_id);
        else
                reg_idx = I40E_VPINT_LNKLSTN(
                     ((pf->hw.func_caps.num_msix_vectors_vf - 1) * vf->vf_id) +
                     (vector_id - 1));

        if (vecmap->rxq_map == 0 && vecmap->txq_map == 0) {
                /* Special case - No queues mapped on this vector */
                wr32(hw, reg_idx, I40E_VPINT_LNKLST0_FIRSTQ_INDX_MASK);
                goto irq_list_done;
        }
        tempmap = vecmap->rxq_map;
        for_each_set_bit(vsi_queue_id, &tempmap, I40E_MAX_VSI_QP) {
                linklistmap |= (BIT(I40E_VIRTCHNL_SUPPORTED_QTYPES *
                                    vsi_queue_id));
        }

        tempmap = vecmap->txq_map;
        for_each_set_bit(vsi_queue_id, &tempmap, I40E_MAX_VSI_QP) {
                linklistmap |= (BIT(I40E_VIRTCHNL_SUPPORTED_QTYPES *
                                     vsi_queue_id + 1));
        }

        next_q = find_first_bit(&linklistmap,
                                (I40E_MAX_VSI_QP *
                                 I40E_VIRTCHNL_SUPPORTED_QTYPES));
        vsi_queue_id = next_q / I40E_VIRTCHNL_SUPPORTED_QTYPES;
        qtype = next_q % I40E_VIRTCHNL_SUPPORTED_QTYPES;
        pf_queue_id = i40e_vc_get_pf_queue_id(vf, vsi_id, vsi_queue_id);
        reg = ((qtype << I40E_VPINT_LNKLSTN_FIRSTQ_TYPE_SHIFT) | pf_queue_id);

        wr32(hw, reg_idx, reg);

        while (next_q < (I40E_MAX_VSI_QP * I40E_VIRTCHNL_SUPPORTED_QTYPES)) {
                switch (qtype) {
                case I40E_QUEUE_TYPE_RX:
                        reg_idx = I40E_QINT_RQCTL(pf_queue_id);
                        itr_idx = vecmap->rxitr_idx;
                        break;
                case I40E_QUEUE_TYPE_TX:
                        reg_idx = I40E_QINT_TQCTL(pf_queue_id);
                        itr_idx = vecmap->txitr_idx;
                        break;
                default:
                        break;
                }

                next_q = find_next_bit(&linklistmap,
                                       (I40E_MAX_VSI_QP *
                                        I40E_VIRTCHNL_SUPPORTED_QTYPES),
                                       next_q + 1);
                if (next_q <
                    (I40E_MAX_VSI_QP * I40E_VIRTCHNL_SUPPORTED_QTYPES)) {
                        vsi_queue_id = next_q / I40E_VIRTCHNL_SUPPORTED_QTYPES;
                        qtype = next_q % I40E_VIRTCHNL_SUPPORTED_QTYPES;
                        pf_queue_id = i40e_vc_get_pf_queue_id(vf, vsi_id,
                                                              vsi_queue_id);
                } else {
                        pf_queue_id = I40E_QUEUE_END_OF_LIST;
                        qtype = 0;
                }

                /* format for the RQCTL & TQCTL regs is same */
                reg = (vector_id) |
                    (qtype << I40E_QINT_RQCTL_NEXTQ_TYPE_SHIFT) |
                    (pf_queue_id << I40E_QINT_RQCTL_NEXTQ_INDX_SHIFT) |
                    BIT(I40E_QINT_RQCTL_CAUSE_ENA_SHIFT) |
                    (itr_idx << I40E_QINT_RQCTL_ITR_INDX_SHIFT);
                wr32(hw, reg_idx, reg);
        }

        /* if the vf is running in polling mode and using interrupt zero,
         * need to disable auto-mask on enabling zero interrupt for VFs.
         */
        if ((vf->driver_caps & VIRTCHNL_VF_OFFLOAD_RX_POLLING) &&
            (vector_id == 0)) {
                reg = rd32(hw, I40E_GLINT_CTL);
                if (!(reg & I40E_GLINT_CTL_DIS_AUTOMASK_VF0_MASK)) {
                        reg |= I40E_GLINT_CTL_DIS_AUTOMASK_VF0_MASK;
                        wr32(hw, I40E_GLINT_CTL, reg);
                }
        }

irq_list_done:
        i40e_flush(hw);
}

/**
 * i40e_release_iwarp_qvlist
 * @vf: pointer to the VF.
 *
 **/
static void i40e_release_iwarp_qvlist(struct i40e_vf *vf)
{
        struct i40e_pf *pf = vf->pf;
        struct virtchnl_iwarp_qvlist_info *qvlist_info = vf->qvlist_info;
        u32 msix_vf;
        u32 i;

        if (!vf->qvlist_info)
                return;

        msix_vf = pf->hw.func_caps.num_msix_vectors_vf;
        for (i = 0; i < qvlist_info->num_vectors; i++) {
                struct virtchnl_iwarp_qv_info *qv_info;
                u32 next_q_index, next_q_type;
                struct i40e_hw *hw = &pf->hw;
                u32 v_idx, reg_idx, reg;

                qv_info = &qvlist_info->qv_info[i];
                if (!qv_info)
                        continue;
                v_idx = qv_info->v_idx;
                if (qv_info->ceq_idx != I40E_QUEUE_INVALID_IDX) {
                        /* Figure out the queue after CEQ and make that the
                         * first queue.
                         */
                        reg_idx = (msix_vf - 1) * vf->vf_id + qv_info->ceq_idx;
                        reg = rd32(hw, I40E_VPINT_CEQCTL(reg_idx));
                        next_q_index = (reg & I40E_VPINT_CEQCTL_NEXTQ_INDX_MASK)
                                        >> I40E_VPINT_CEQCTL_NEXTQ_INDX_SHIFT;
                        next_q_type = (reg & I40E_VPINT_CEQCTL_NEXTQ_TYPE_MASK)
                                        >> I40E_VPINT_CEQCTL_NEXTQ_TYPE_SHIFT;

                        reg_idx = ((msix_vf - 1) * vf->vf_id) + (v_idx - 1);
                        reg = (next_q_index &
                               I40E_VPINT_LNKLSTN_FIRSTQ_INDX_MASK) |
                               (next_q_type <<
                               I40E_VPINT_LNKLSTN_FIRSTQ_TYPE_SHIFT);

                        wr32(hw, I40E_VPINT_LNKLSTN(reg_idx), reg);
                }
        }
        kfree(vf->qvlist_info);
        vf->qvlist_info = NULL;
}

/**
 * i40e_config_iwarp_qvlist
 * @vf: pointer to the VF info
 * @qvlist_info: queue and vector list
 *
 * Return 0 on success or < 0 on error
 **/
static int i40e_config_iwarp_qvlist(struct i40e_vf *vf,
                                    struct virtchnl_iwarp_qvlist_info *qvlist_info)
{
        struct i40e_pf *pf = vf->pf;
        struct i40e_hw *hw = &pf->hw;
        struct virtchnl_iwarp_qv_info *qv_info;
        u32 v_idx, i, reg_idx, reg;
        u32 next_q_idx, next_q_type;
        u32 msix_vf, size;

        size = sizeof(struct virtchnl_iwarp_qvlist_info) +
               (sizeof(struct virtchnl_iwarp_qv_info) *
                                                (qvlist_info->num_vectors - 1));
        vf->qvlist_info = kzalloc(size, GFP_KERNEL);
        vf->qvlist_info->num_vectors = qvlist_info->num_vectors;

        msix_vf = pf->hw.func_caps.num_msix_vectors_vf;
        for (i = 0; i < qvlist_info->num_vectors; i++) {
                qv_info = &qvlist_info->qv_info[i];
                if (!qv_info)
                        continue;
                v_idx = qv_info->v_idx;

                /* Validate vector id belongs to this vf */
                if (!i40e_vc_isvalid_vector_id(vf, v_idx))
                        goto err;

                vf->qvlist_info->qv_info[i] = *qv_info;

                reg_idx = ((msix_vf - 1) * vf->vf_id) + (v_idx - 1);
                /* We might be sharing the interrupt, so get the first queue
                 * index and type, push it down the list by adding the new
                 * queue on top. Also link it with the new queue in CEQCTL.
                 */
                reg = rd32(hw, I40E_VPINT_LNKLSTN(reg_idx));
                next_q_idx = ((reg & I40E_VPINT_LNKLSTN_FIRSTQ_INDX_MASK) >>
                                I40E_VPINT_LNKLSTN_FIRSTQ_INDX_SHIFT);
                next_q_type = ((reg & I40E_VPINT_LNKLSTN_FIRSTQ_TYPE_MASK) >>
                                I40E_VPINT_LNKLSTN_FIRSTQ_TYPE_SHIFT);

                if (qv_info->ceq_idx != I40E_QUEUE_INVALID_IDX) {
                        reg_idx = (msix_vf - 1) * vf->vf_id + qv_info->ceq_idx;
                        reg = (I40E_VPINT_CEQCTL_CAUSE_ENA_MASK |
                        (v_idx << I40E_VPINT_CEQCTL_MSIX_INDX_SHIFT) |
                        (qv_info->itr_idx << I40E_VPINT_CEQCTL_ITR_INDX_SHIFT) |
                        (next_q_type << I40E_VPINT_CEQCTL_NEXTQ_TYPE_SHIFT) |
                        (next_q_idx << I40E_VPINT_CEQCTL_NEXTQ_INDX_SHIFT));
                        wr32(hw, I40E_VPINT_CEQCTL(reg_idx), reg);

                        reg_idx = ((msix_vf - 1) * vf->vf_id) + (v_idx - 1);
                        reg = (qv_info->ceq_idx &
                               I40E_VPINT_LNKLSTN_FIRSTQ_INDX_MASK) |
                               (I40E_QUEUE_TYPE_PE_CEQ <<
                               I40E_VPINT_LNKLSTN_FIRSTQ_TYPE_SHIFT);
                        wr32(hw, I40E_VPINT_LNKLSTN(reg_idx), reg);
                }

                if (qv_info->aeq_idx != I40E_QUEUE_INVALID_IDX) {
                        reg = (I40E_VPINT_AEQCTL_CAUSE_ENA_MASK |
                        (v_idx << I40E_VPINT_AEQCTL_MSIX_INDX_SHIFT) |
                        (qv_info->itr_idx << I40E_VPINT_AEQCTL_ITR_INDX_SHIFT));

                        wr32(hw, I40E_VPINT_AEQCTL(vf->vf_id), reg);
                }
        }

        return 0;
err:
        kfree(vf->qvlist_info);
        vf->qvlist_info = NULL;
        return -EINVAL;
}

/**
 * i40e_config_vsi_tx_queue
 * @vf: pointer to the VF info
 * @vsi_id: id of VSI as provided by the FW
 * @vsi_queue_id: vsi relative queue index
 * @info: config. info
 *
 * configure tx queue
 **/
static int i40e_config_vsi_tx_queue(struct i40e_vf *vf, u16 vsi_id,
                                    u16 vsi_queue_id,
                                    struct virtchnl_txq_info *info)
{
        struct i40e_pf *pf = vf->pf;
        struct i40e_hw *hw = &pf->hw;
        struct i40e_hmc_obj_txq tx_ctx;
        struct i40e_vsi *vsi;
        u16 pf_queue_id;
        u32 qtx_ctl;
        int ret = 0;

        if (!i40e_vc_isvalid_vsi_id(vf, info->vsi_id)) {
                ret = -ENOENT;
                goto error_context;
        }
        pf_queue_id = i40e_vc_get_pf_queue_id(vf, vsi_id, vsi_queue_id);
        vsi = i40e_find_vsi_from_id(pf, vsi_id);
        if (!vsi) {
                ret = -ENOENT;
                goto error_context;
        }

        /* clear the context structure first */
        memset(&tx_ctx, 0, sizeof(struct i40e_hmc_obj_txq));

        /* only set the required fields */
        tx_ctx.base = info->dma_ring_addr / 128;
        tx_ctx.qlen = info->ring_len;
        tx_ctx.rdylist = le16_to_cpu(vsi->info.qs_handle[0]);
        tx_ctx.rdylist_act = 0;
        tx_ctx.head_wb_ena = info->headwb_enabled;
        tx_ctx.head_wb_addr = info->dma_headwb_addr;

        /* clear the context in the HMC */
        ret = i40e_clear_lan_tx_queue_context(hw, pf_queue_id);
        if (ret) {
                dev_err(&pf->pdev->dev,
                        "Failed to clear VF LAN Tx queue context %d, error: %d\n",
                        pf_queue_id, ret);
                ret = -ENOENT;
                goto error_context;
        }

        /* set the context in the HMC */
        ret = i40e_set_lan_tx_queue_context(hw, pf_queue_id, &tx_ctx);
        if (ret) {
                dev_err(&pf->pdev->dev,
                        "Failed to set VF LAN Tx queue context %d error: %d\n",
                        pf_queue_id, ret);
                ret = -ENOENT;
                goto error_context;
        }

        /* associate this queue with the PCI VF function */
        qtx_ctl = I40E_QTX_CTL_VF_QUEUE;
        qtx_ctl |= ((hw->pf_id << I40E_QTX_CTL_PF_INDX_SHIFT)
                    & I40E_QTX_CTL_PF_INDX_MASK);
        qtx_ctl |= (((vf->vf_id + hw->func_caps.vf_base_id)
                     << I40E_QTX_CTL_VFVM_INDX_SHIFT)
                    & I40E_QTX_CTL_VFVM_INDX_MASK);
        wr32(hw, I40E_QTX_CTL(pf_queue_id), qtx_ctl);
        i40e_flush(hw);

error_context:
        return ret;
}

/**
 * i40e_config_vsi_rx_queue
 * @vf: pointer to the VF info
 * @vsi_id: id of VSI  as provided by the FW
 * @vsi_queue_id: vsi relative queue index
 * @info: config. info
 *
 * configure rx queue
 **/
static int i40e_config_vsi_rx_queue(struct i40e_vf *vf, u16 vsi_id,
                                    u16 vsi_queue_id,
                                    struct virtchnl_rxq_info *info)
{
        struct i40e_pf *pf = vf->pf;
        struct i40e_hw *hw = &pf->hw;
        struct i40e_hmc_obj_rxq rx_ctx;
        u16 pf_queue_id;
        int ret = 0;

        pf_queue_id = i40e_vc_get_pf_queue_id(vf, vsi_id, vsi_queue_id);

        /* clear the context structure first */
        memset(&rx_ctx, 0, sizeof(struct i40e_hmc_obj_rxq));

        /* only set the required fields */
        rx_ctx.base = info->dma_ring_addr / 128;
        rx_ctx.qlen = info->ring_len;

        if (info->splithdr_enabled) {
                rx_ctx.hsplit_0 = I40E_RX_SPLIT_L2      |
                                  I40E_RX_SPLIT_IP      |
                                  I40E_RX_SPLIT_TCP_UDP |
                                  I40E_RX_SPLIT_SCTP;
                /* header length validation */
                if (info->hdr_size > ((2 * 1024) - 64)) {
                        ret = -EINVAL;
                        goto error_param;
                }
                rx_ctx.hbuff = info->hdr_size >> I40E_RXQ_CTX_HBUFF_SHIFT;

                /* set split mode 10b */
                rx_ctx.dtype = I40E_RX_DTYPE_HEADER_SPLIT;
        }

        /* databuffer length validation */
        if (info->databuffer_size > ((16 * 1024) - 128)) {
                ret = -EINVAL;
                goto error_param;
        }
        rx_ctx.dbuff = info->databuffer_size >> I40E_RXQ_CTX_DBUFF_SHIFT;

        /* max pkt. length validation */
        if (info->max_pkt_size >= (16 * 1024) || info->max_pkt_size < 64) {
                ret = -EINVAL;
                goto error_param;
        }
        rx_ctx.rxmax = info->max_pkt_size;

        /* enable 32bytes desc always */
        rx_ctx.dsize = 1;

        /* default values */
        rx_ctx.lrxqthresh = 2;
        rx_ctx.crcstrip = 1;
        rx_ctx.prefena = 1;
        rx_ctx.l2tsel = 1;

        /* clear the context in the HMC */
        ret = i40e_clear_lan_rx_queue_context(hw, pf_queue_id);
        if (ret) {
                dev_err(&pf->pdev->dev,
                        "Failed to clear VF LAN Rx queue context %d, error: %d\n",
                        pf_queue_id, ret);
                ret = -ENOENT;
                goto error_param;
        }

        /* set the context in the HMC */
        ret = i40e_set_lan_rx_queue_context(hw, pf_queue_id, &rx_ctx);
        if (ret) {
                dev_err(&pf->pdev->dev,
                        "Failed to set VF LAN Rx queue context %d error: %d\n",
                        pf_queue_id, ret);
                ret = -ENOENT;
                goto error_param;
        }

error_param:
        return ret;
}

/**
 * i40e_alloc_vsi_res
 * @vf: pointer to the VF info
 * @type: type of VSI to allocate
 *
 * alloc VF vsi context & resources
 **/
static int i40e_alloc_vsi_res(struct i40e_vf *vf, enum i40e_vsi_type type)
{
        struct i40e_mac_filter *f = NULL;
        struct i40e_pf *pf = vf->pf;
        struct i40e_vsi *vsi;
        int ret = 0;

        vsi = i40e_vsi_setup(pf, type, pf->vsi[pf->lan_vsi]->seid, vf->vf_id);

        if (!vsi) {
                dev_err(&pf->pdev->dev,
                        "add vsi failed for VF %d, aq_err %d\n",
                        vf->vf_id, pf->hw.aq.asq_last_status);
                ret = -ENOENT;
                goto error_alloc_vsi_res;
        }
        if (type == I40E_VSI_SRIOV) {
                u64 hena = i40e_pf_get_default_rss_hena(pf);
                u8 broadcast[ETH_ALEN];

                vf->lan_vsi_idx = vsi->idx;
                vf->lan_vsi_id = vsi->id;
                /* If the port VLAN has been configured and then the
                 * VF driver was removed then the VSI port VLAN
                 * configuration was destroyed.  Check if there is
                 * a port VLAN and restore the VSI configuration if
                 * needed.
                 */
                if (vf->port_vlan_id)
                        i40e_vsi_add_pvid(vsi, vf->port_vlan_id);

                spin_lock_bh(&vsi->mac_filter_hash_lock);
                if (is_valid_ether_addr(vf->default_lan_addr.addr)) {
                        f = i40e_add_mac_filter(vsi,
                                                vf->default_lan_addr.addr);
                        if (!f)
                                dev_info(&pf->pdev->dev,
                                         "Could not add MAC filter %pM for VF %d\n",
                                        vf->default_lan_addr.addr, vf->vf_id);
                }
                eth_broadcast_addr(broadcast);
                f = i40e_add_mac_filter(vsi, broadcast);
                if (!f)
                        dev_info(&pf->pdev->dev,
                                 "Could not allocate VF broadcast filter\n");
                spin_unlock_bh(&vsi->mac_filter_hash_lock);
                wr32(&pf->hw, I40E_VFQF_HENA1(0, vf->vf_id), (u32)hena);
                wr32(&pf->hw, I40E_VFQF_HENA1(1, vf->vf_id), (u32)(hena >> 32));
        }

        /* program mac filter */
        ret = i40e_sync_vsi_filters(vsi);
        if (ret)
                dev_err(&pf->pdev->dev, "Unable to program ucast filters\n");

        /* Set VF bandwidth if specified */
        if (vf->tx_rate) {
                ret = i40e_aq_config_vsi_bw_limit(&pf->hw, vsi->seid,
                                                  vf->tx_rate / 50, 0, NULL);
                if (ret)
                        dev_err(&pf->pdev->dev, "Unable to set tx rate, VF %d, error code %d.\n",
                                vf->vf_id, ret);
        }

error_alloc_vsi_res:
        return ret;
}

/**
 * i40e_enable_vf_mappings
 * @vf: pointer to the VF info
 *
 * enable VF mappings
 **/
static void i40e_enable_vf_mappings(struct i40e_vf *vf)
{
        struct i40e_pf *pf = vf->pf;
        struct i40e_hw *hw = &pf->hw;
        u32 reg, total_queue_pairs = 0;
        int j;

        /* Tell the hardware we're using noncontiguous mapping. HW requires
         * that VF queues be mapped using this method, even when they are
         * contiguous in real life
         */
        i40e_write_rx_ctl(hw, I40E_VSILAN_QBASE(vf->lan_vsi_id),
                          I40E_VSILAN_QBASE_VSIQTABLE_ENA_MASK);

        /* enable VF vplan_qtable mappings */
        reg = I40E_VPLAN_MAPENA_TXRX_ENA_MASK;
        wr32(hw, I40E_VPLAN_MAPENA(vf->vf_id), reg);

        /* map PF queues to VF queues */
        for (j = 0; j < pf->vsi[vf->lan_vsi_idx]->alloc_queue_pairs; j++) {
                u16 qid = i40e_vc_get_pf_queue_id(vf, vf->lan_vsi_id, j);

                reg = (qid & I40E_VPLAN_QTABLE_QINDEX_MASK);
                wr32(hw, I40E_VPLAN_QTABLE(total_queue_pairs, vf->vf_id), reg);
                total_queue_pairs++;
        }

        /* map PF queues to VSI */
        for (j = 0; j < 7; j++) {
                if (j * 2 >= pf->vsi[vf->lan_vsi_idx]->alloc_queue_pairs) {
                        reg = 0x07FF07FF;       /* unused */
                } else {
                        u16 qid = i40e_vc_get_pf_queue_id(vf, vf->lan_vsi_id,
                                                          j * 2);
                        reg = qid;
                        qid = i40e_vc_get_pf_queue_id(vf, vf->lan_vsi_id,
                                                      (j * 2) + 1);
                        reg |= qid << 16;
                }
                i40e_write_rx_ctl(hw, I40E_VSILAN_QTABLE(j, vf->lan_vsi_id),
                                  reg);
        }

        i40e_flush(hw);
}

/**
 * i40e_disable_vf_mappings
 * @vf: pointer to the VF info
 *
 * disable VF mappings
 **/
static void i40e_disable_vf_mappings(struct i40e_vf *vf)
{
        struct i40e_pf *pf = vf->pf;
        struct i40e_hw *hw = &pf->hw;
        int i;

        /* disable qp mappings */
        wr32(hw, I40E_VPLAN_MAPENA(vf->vf_id), 0);
        for (i = 0; i < I40E_MAX_VSI_QP; i++)
                wr32(hw, I40E_VPLAN_QTABLE(i, vf->vf_id),
                     I40E_QUEUE_END_OF_LIST);
        i40e_flush(hw);
}

/**
 * i40e_free_vf_res
 * @vf: pointer to the VF info
 *
 * free VF resources
 **/
static void i40e_free_vf_res(struct i40e_vf *vf)
{
        struct i40e_pf *pf = vf->pf;
        struct i40e_hw *hw = &pf->hw;
        u32 reg_idx, reg;
        int i, msix_vf;

        /* Start by disabling VF's configuration API to prevent the OS from
         * accessing the VF's VSI after it's freed / invalidated.
         */
        clear_bit(I40E_VF_STATE_INIT, &vf->vf_states);

        /* free vsi & disconnect it from the parent uplink */
        if (vf->lan_vsi_idx) {
                i40e_vsi_release(pf->vsi[vf->lan_vsi_idx]);
                vf->lan_vsi_idx = 0;
                vf->lan_vsi_id = 0;
                vf->num_mac = 0;
        }
        msix_vf = pf->hw.func_caps.num_msix_vectors_vf;

        /* disable interrupts so the VF starts in a known state */
        for (i = 0; i < msix_vf; i++) {
                /* format is same for both registers */
                if (0 == i)
                        reg_idx = I40E_VFINT_DYN_CTL0(vf->vf_id);
                else
                        reg_idx = I40E_VFINT_DYN_CTLN(((msix_vf - 1) *
                                                      (vf->vf_id))
                                                     + (i - 1));
                wr32(hw, reg_idx, I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
                i40e_flush(hw);
        }

        /* clear the irq settings */
        for (i = 0; i < msix_vf; i++) {
                /* format is same for both registers */
                if (0 == i)
                        reg_idx = I40E_VPINT_LNKLST0(vf->vf_id);
                else
                        reg_idx = I40E_VPINT_LNKLSTN(((msix_vf - 1) *
                                                      (vf->vf_id))
                                                     + (i - 1));
                reg = (I40E_VPINT_LNKLSTN_FIRSTQ_TYPE_MASK |
                       I40E_VPINT_LNKLSTN_FIRSTQ_INDX_MASK);
                wr32(hw, reg_idx, reg);
                i40e_flush(hw);
        }
        /* reset some of the state variables keeping track of the resources */
        vf->num_queue_pairs = 0;
        vf->vf_states = 0;
}

/**
 * i40e_alloc_vf_res
 * @vf: pointer to the VF info
 *
 * allocate VF resources
 **/
static int i40e_alloc_vf_res(struct i40e_vf *vf)
{
        struct i40e_pf *pf = vf->pf;
        int total_queue_pairs = 0;
        int ret;

        /* allocate hw vsi context & associated resources */
        ret = i40e_alloc_vsi_res(vf, I40E_VSI_SRIOV);
        if (ret)
                goto error_alloc;
        total_queue_pairs += pf->vsi[vf->lan_vsi_idx]->alloc_queue_pairs;

        if (vf->trusted)
                set_bit(I40E_VIRTCHNL_VF_CAP_PRIVILEGE, &vf->vf_caps);
        else
                clear_bit(I40E_VIRTCHNL_VF_CAP_PRIVILEGE, &vf->vf_caps);

        /* store the total qps number for the runtime
         * VF req validation
         */
        vf->num_queue_pairs = total_queue_pairs;

        /* VF is now completely initialized */
        set_bit(I40E_VF_STATE_INIT, &vf->vf_states);

error_alloc:
        if (ret)
                i40e_free_vf_res(vf);

        return ret;
}

#define VF_DEVICE_STATUS 0xAA
#define VF_TRANS_PENDING_MASK 0x20
/**
 * i40e_quiesce_vf_pci
 * @vf: pointer to the VF structure
 *
 * Wait for VF PCI transactions to be cleared after reset. Returns -EIO
 * if the transactions never clear.
 **/
static int i40e_quiesce_vf_pci(struct i40e_vf *vf)
{
        struct i40e_pf *pf = vf->pf;
        struct i40e_hw *hw = &pf->hw;
        int vf_abs_id, i;
        u32 reg;

        vf_abs_id = vf->vf_id + hw->func_caps.vf_base_id;

        wr32(hw, I40E_PF_PCI_CIAA,
             VF_DEVICE_STATUS | (vf_abs_id << I40E_PF_PCI_CIAA_VF_NUM_SHIFT));
        for (i = 0; i < 100; i++) {
                reg = rd32(hw, I40E_PF_PCI_CIAD);
                if ((reg & VF_TRANS_PENDING_MASK) == 0)
                        return 0;
                udelay(1);
        }
        return -EIO;
}

/**
 * i40e_trigger_vf_reset
 * @vf: pointer to the VF structure
 * @flr: VFLR was issued or not
 *
 * Trigger hardware to start a reset for a particular VF. Expects the caller
 * to wait the proper amount of time to allow hardware to reset the VF before
 * it cleans up and restores VF functionality.
 **/
static void i40e_trigger_vf_reset(struct i40e_vf *vf, bool flr)
{
        struct i40e_pf *pf = vf->pf;
        struct i40e_hw *hw = &pf->hw;
        u32 reg, reg_idx, bit_idx;

        /* warn the VF */
        clear_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states);

        /* Disable VF's configuration API during reset. The flag is re-enabled
         * in i40e_alloc_vf_res(), when it's safe again to access VF's VSI.
         * It's normally disabled in i40e_free_vf_res(), but it's safer
         * to do it earlier to give some time to finish to any VF config
         * functions that may still be running at this point.
         */
        clear_bit(I40E_VF_STATE_INIT, &vf->vf_states);

        /* In the case of a VFLR, the HW has already reset the VF and we
         * just need to clean up, so don't hit the VFRTRIG register.
         */
        if (!flr) {
                /* reset VF using VPGEN_VFRTRIG reg */
                reg = rd32(hw, I40E_VPGEN_VFRTRIG(vf->vf_id));
                reg |= I40E_VPGEN_VFRTRIG_VFSWR_MASK;
                wr32(hw, I40E_VPGEN_VFRTRIG(vf->vf_id), reg);
                i40e_flush(hw);
        }
        /* clear the VFLR bit in GLGEN_VFLRSTAT */
        reg_idx = (hw->func_caps.vf_base_id + vf->vf_id) / 32;
        bit_idx = (hw->func_caps.vf_base_id + vf->vf_id) % 32;
        wr32(hw, I40E_GLGEN_VFLRSTAT(reg_idx), BIT(bit_idx));
        i40e_flush(hw);

        if (i40e_quiesce_vf_pci(vf))
                dev_err(&pf->pdev->dev, "VF %d PCI transactions stuck\n",
                        vf->vf_id);
}

/**
 * i40e_cleanup_reset_vf
 * @vf: pointer to the VF structure
 *
 * Cleanup a VF after the hardware reset is finished. Expects the caller to
 * have verified whether the reset is finished properly, and ensure the
 * minimum amount of wait time has passed.
 **/
static void i40e_cleanup_reset_vf(struct i40e_vf *vf)
{
        struct i40e_pf *pf = vf->pf;
        struct i40e_hw *hw = &pf->hw;
        u32 reg;

        /* free VF resources to begin resetting the VSI state */
        i40e_free_vf_res(vf);

        /* Enable hardware by clearing the reset bit in the VPGEN_VFRTRIG reg.
         * By doing this we allow HW to access VF memory at any point. If we
         * did it any sooner, HW could access memory while it was being freed
         * in i40e_free_vf_res(), causing an IOMMU fault.
         *
         * On the other hand, this needs to be done ASAP, because the VF driver
         * is waiting for this to happen and may report a timeout. It's
         * harmless, but it gets logged into Guest OS kernel log, so best avoid
         * it.
         */
        reg = rd32(hw, I40E_VPGEN_VFRTRIG(vf->vf_id));

        reg &= ~I40E_VPGEN_VFRTRIG_VFSWR_MASK;
        wr32(hw, I40E_VPGEN_VFRTRIG(vf->vf_id), reg);

        /* reallocate VF resources to finish resetting the VSI state */
        if (!i40e_alloc_vf_res(vf)) {
                int abs_vf_id = vf->vf_id + hw->func_caps.vf_base_id;
                i40e_enable_vf_mappings(vf);
                set_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states);
                clear_bit(I40E_VF_STATE_DISABLED, &vf->vf_states);
                /* Do not notify the client during VF init */
                if (test_and_clear_bit(I40E_VF_STATE_PRE_ENABLE,
                                       &vf->vf_states))
                        i40e_notify_client_of_vf_reset(pf, abs_vf_id);
                vf->num_vlan = 0;
        }

        /* Tell the VF driver the reset is done. This needs to be done only
         * after VF has been fully initialized, because the VF driver may
         * request resources immediately after setting this flag.
         */
        wr32(hw, I40E_VFGEN_RSTAT1(vf->vf_id), VIRTCHNL_VFR_VFACTIVE);
}

/**
 * i40e_reset_vf
 * @vf: pointer to the VF structure
 * @flr: VFLR was issued or not
 *
 * reset the VF
 **/
void i40e_reset_vf(struct i40e_vf *vf, bool flr)
{
        struct i40e_pf *pf = vf->pf;
        struct i40e_hw *hw = &pf->hw;
        bool rsd = false;
        u32 reg;
        int i;

        /* If VFs have been disabled, there is no need to reset */
        if (test_and_set_bit(__I40E_VF_DISABLE, pf->state))
                return;

        i40e_trigger_vf_reset(vf, flr);

        /* poll VPGEN_VFRSTAT reg to make sure
         * that reset is complete
         */
        for (i = 0; i < 10; i++) {
                /* VF reset requires driver to first reset the VF and then
                 * poll the status register to make sure that the reset
                 * completed successfully. Due to internal HW FIFO flushes,
                 * we must wait 10ms before the register will be valid.
                 */
                usleep_range(10000, 20000);
                reg = rd32(hw, I40E_VPGEN_VFRSTAT(vf->vf_id));
                if (reg & I40E_VPGEN_VFRSTAT_VFRD_MASK) {
                        rsd = true;
                        break;
                }
        }

        if (flr)
                usleep_range(10000, 20000);

        if (!rsd)
                dev_err(&pf->pdev->dev, "VF reset check timeout on VF %d\n",
                        vf->vf_id);
        usleep_range(10000, 20000);

        /* On initial reset, we don't have any queues to disable */
        if (vf->lan_vsi_idx != 0)
                i40e_vsi_stop_rings(pf->vsi[vf->lan_vsi_idx]);

        i40e_cleanup_reset_vf(vf);

        i40e_flush(hw);
        clear_bit(__I40E_VF_DISABLE, pf->state);
}

/**
 * i40e_reset_all_vfs
 * @pf: pointer to the PF structure
 * @flr: VFLR was issued or not
 *
 * Reset all allocated VFs in one go. First, tell the hardware to reset each
 * VF, then do all the waiting in one chunk, and finally finish restoring each
 * VF after the wait. This is useful during PF routines which need to reset
 * all VFs, as otherwise it must perform these resets in a serialized fashion.
 **/
void i40e_reset_all_vfs(struct i40e_pf *pf, bool flr)
{
        struct i40e_hw *hw = &pf->hw;
        struct i40e_vf *vf;
        int i, v;
        u32 reg;

        /* If we don't have any VFs, then there is nothing to reset */
        if (!pf->num_alloc_vfs)
                return;

        /* If VFs have been disabled, there is no need to reset */
        if (test_and_set_bit(__I40E_VF_DISABLE, pf->state))
                return;

        /* Begin reset on all VFs at once */
        for (v = 0; v < pf->num_alloc_vfs; v++)
                i40e_trigger_vf_reset(&pf->vf[v], flr);

        /* HW requires some time to make sure it can flush the FIFO for a VF
         * when it resets it. Poll the VPGEN_VFRSTAT register for each VF in
         * sequence to make sure that it has completed. We'll keep track of
         * the VFs using a simple iterator that increments once that VF has
         * finished resetting.
         */
        for (i = 0, v = 0; i < 10 && v < pf->num_alloc_vfs; i++) {
                usleep_range(10000, 20000);

                /* Check each VF in sequence, beginning with the VF to fail
                 * the previous check.
                 */
                while (v < pf->num_alloc_vfs) {
                        vf = &pf->vf[v];
                        reg = rd32(hw, I40E_VPGEN_VFRSTAT(vf->vf_id));
                        if (!(reg & I40E_VPGEN_VFRSTAT_VFRD_MASK))
                                break;

                        /* If the current VF has finished resetting, move on
                         * to the next VF in sequence.
                         */
                        v++;
                }
        }

        if (flr)
                usleep_range(10000, 20000);

        /* Display a warning if at least one VF didn't manage to reset in
         * time, but continue on with the operation.
         */
        if (v < pf->num_alloc_vfs)
                dev_err(&pf->pdev->dev, "VF reset check timeout on VF %d\n",
                        pf->vf[v].vf_id);
        usleep_range(10000, 20000);

        /* Begin disabling all the rings associated with VFs, but do not wait
         * between each VF.
         */
        for (v = 0; v < pf->num_alloc_vfs; v++) {
                /* On initial reset, we don't have any queues to disable */
                if (pf->vf[v].lan_vsi_idx == 0)
                        continue;

                i40e_vsi_stop_rings_no_wait(pf->vsi[pf->vf[v].lan_vsi_idx]);
        }

        /* Now that we've notified HW to disable all of the VF rings, wait
         * until they finish.
         */
        for (v = 0; v < pf->num_alloc_vfs; v++) {
                /* On initial reset, we don't have any queues to disable */
                if (pf->vf[v].lan_vsi_idx == 0)
                        continue;

                i40e_vsi_wait_queues_disabled(pf->vsi[pf->vf[v].lan_vsi_idx]);
        }

        /* Hw may need up to 50ms to finish disabling the RX queues. We
         * minimize the wait by delaying only once for all VFs.
         */
        mdelay(50);

        /* Finish the reset on each VF */
        for (v = 0; v < pf->num_alloc_vfs; v++)
                i40e_cleanup_reset_vf(&pf->vf[v]);

        i40e_flush(hw);
        clear_bit(__I40E_VF_DISABLE, pf->state);
}

/**
 * i40e_free_vfs
 * @pf: pointer to the PF structure
 *
 * free VF resources
 **/
void i40e_free_vfs(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        u32 reg_idx, bit_idx;
        int i, tmp, vf_id;

        if (!pf->vf)
                return;
        while (test_and_set_bit(__I40E_VF_DISABLE, pf->state))
                usleep_range(1000, 2000);

        i40e_notify_client_of_vf_enable(pf, 0);

        /* Amortize wait time by stopping all VFs at the same time */
        for (i = 0; i < pf->num_alloc_vfs; i++) {
                if (test_bit(I40E_VF_STATE_INIT, &pf->vf[i].vf_states))
                        continue;

                i40e_vsi_stop_rings_no_wait(pf->vsi[pf->vf[i].lan_vsi_idx]);
        }

        for (i = 0; i < pf->num_alloc_vfs; i++) {
                if (test_bit(I40E_VF_STATE_INIT, &pf->vf[i].vf_states))
                        continue;

                i40e_vsi_wait_queues_disabled(pf->vsi[pf->vf[i].lan_vsi_idx]);
        }

        /* Disable IOV before freeing resources. This lets any VF drivers
         * running in the host get themselves cleaned up before we yank
         * the carpet out from underneath their feet.
         */
        if (!pci_vfs_assigned(pf->pdev))
                pci_disable_sriov(pf->pdev);
        else
                dev_warn(&pf->pdev->dev, "VFs are assigned - not disabling SR-IOV\n");

        /* free up VF resources */
        tmp = pf->num_alloc_vfs;
        pf->num_alloc_vfs = 0;
        for (i = 0; i < tmp; i++) {
                if (test_bit(I40E_VF_STATE_INIT, &pf->vf[i].vf_states))
                        i40e_free_vf_res(&pf->vf[i]);
                /* disable qp mappings */
                i40e_disable_vf_mappings(&pf->vf[i]);
        }

        kfree(pf->vf);
        pf->vf = NULL;

        /* This check is for when the driver is unloaded while VFs are
         * assigned. Setting the number of VFs to 0 through sysfs is caught
         * before this function ever gets called.
         */
        if (!pci_vfs_assigned(pf->pdev)) {
                /* Acknowledge VFLR for all VFS. Without this, VFs will fail to
                 * work correctly when SR-IOV gets re-enabled.
                 */
                for (vf_id = 0; vf_id < tmp; vf_id++) {
                        reg_idx = (hw->func_caps.vf_base_id + vf_id) / 32;
                        bit_idx = (hw->func_caps.vf_base_id + vf_id) % 32;
                        wr32(hw, I40E_GLGEN_VFLRSTAT(reg_idx), BIT(bit_idx));
                }
        }
        clear_bit(__I40E_VF_DISABLE, pf->state);
}

#ifdef CONFIG_PCI_IOV
/**
 * i40e_alloc_vfs
 * @pf: pointer to the PF structure
 * @num_alloc_vfs: number of VFs to allocate
 *
 * allocate VF resources
 **/
int i40e_alloc_vfs(struct i40e_pf *pf, u16 num_alloc_vfs)
{
        struct i40e_vf *vfs;
        int i, ret = 0;

        /* Disable interrupt 0 so we don't try to handle the VFLR. */
        i40e_irq_dynamic_disable_icr0(pf);

        /* Check to see if we're just allocating resources for extant VFs */
        if (pci_num_vf(pf->pdev) != num_alloc_vfs) {
                ret = pci_enable_sriov(pf->pdev, num_alloc_vfs);
                if (ret) {
                        pf->flags &= ~I40E_FLAG_VEB_MODE_ENABLED;
                        pf->num_alloc_vfs = 0;
                        goto err_iov;
                }
        }
        /* allocate memory */
        vfs = kcalloc(num_alloc_vfs, sizeof(struct i40e_vf), GFP_KERNEL);
        if (!vfs) {
                ret = -ENOMEM;
                goto err_alloc;
        }
        pf->vf = vfs;

        /* apply default profile */
        for (i = 0; i < num_alloc_vfs; i++) {
                vfs[i].pf = pf;
                vfs[i].parent_type = I40E_SWITCH_ELEMENT_TYPE_VEB;
                vfs[i].vf_id = i;

                /* assign default capabilities */
                set_bit(I40E_VIRTCHNL_VF_CAP_L2, &vfs[i].vf_caps);
                vfs[i].spoofchk = true;

                set_bit(I40E_VF_STATE_PRE_ENABLE, &vfs[i].vf_states);

        }
        pf->num_alloc_vfs = num_alloc_vfs;

        /* VF resources get allocated during reset */
        i40e_reset_all_vfs(pf, false);

        i40e_notify_client_of_vf_enable(pf, num_alloc_vfs);

err_alloc:
        if (ret)
                i40e_free_vfs(pf);
err_iov:
        /* Re-enable interrupt 0. */
        i40e_irq_dynamic_enable_icr0(pf, false);
        return ret;
}

#endif
/**
 * i40e_pci_sriov_enable
 * @pdev: pointer to a pci_dev structure
 * @num_vfs: number of VFs to allocate
 *
 * Enable or change the number of VFs
 **/
static int i40e_pci_sriov_enable(struct pci_dev *pdev, int num_vfs)
{
#ifdef CONFIG_PCI_IOV
        struct i40e_pf *pf = pci_get_drvdata(pdev);
        int pre_existing_vfs = pci_num_vf(pdev);
        int err = 0;

        if (test_bit(__I40E_TESTING, pf->state)) {
                dev_warn(&pdev->dev,
                         "Cannot enable SR-IOV virtual functions while the device is undergoing diagnostic testing\n");
                err = -EPERM;
                goto err_out;
        }

        if (pre_existing_vfs && pre_existing_vfs != num_vfs)
                i40e_free_vfs(pf);
        else if (pre_existing_vfs && pre_existing_vfs == num_vfs)
                goto out;

        if (num_vfs > pf->num_req_vfs) {
                dev_warn(&pdev->dev, "Unable to enable %d VFs. Limited to %d VFs due to device resource constraints.\n",
                         num_vfs, pf->num_req_vfs);
                err = -EPERM;
                goto err_out;
        }

        dev_info(&pdev->dev, "Allocating %d VFs.\n", num_vfs);
        err = i40e_alloc_vfs(pf, num_vfs);
        if (err) {
                dev_warn(&pdev->dev, "Failed to enable SR-IOV: %d\n", err);
                goto err_out;
        }

out:
        return num_vfs;

err_out:
        return err;
#endif
        return 0;
}

/**
 * i40e_pci_sriov_configure
 * @pdev: pointer to a pci_dev structure
 * @num_vfs: number of VFs to allocate
 *
 * Enable or change the number of VFs. Called when the user updates the number
 * of VFs in sysfs.
 **/
int i40e_pci_sriov_configure(struct pci_dev *pdev, int num_vfs)
{
        struct i40e_pf *pf = pci_get_drvdata(pdev);

        if (num_vfs) {
                if (!(pf->flags & I40E_FLAG_VEB_MODE_ENABLED)) {
                        pf->flags |= I40E_FLAG_VEB_MODE_ENABLED;
                        i40e_do_reset_safe(pf,
                                           BIT_ULL(__I40E_PF_RESET_REQUESTED));
                }
                return i40e_pci_sriov_enable(pdev, num_vfs);
        }

        if (!pci_vfs_assigned(pf->pdev)) {
                i40e_free_vfs(pf);
                pf->flags &= ~I40E_FLAG_VEB_MODE_ENABLED;
                i40e_do_reset_safe(pf, BIT_ULL(__I40E_PF_RESET_REQUESTED));
        } else {
                dev_warn(&pdev->dev, "Unable to free VFs because some are assigned to VMs.\n");
                return -EINVAL;
        }
        return 0;
}

/***********************virtual channel routines******************/

/**
 * i40e_vc_send_msg_to_vf
 * @vf: pointer to the VF info
 * @v_opcode: virtual channel opcode
 * @v_retval: virtual channel return value
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * send msg to VF
 **/
static int i40e_vc_send_msg_to_vf(struct i40e_vf *vf, u32 v_opcode,
                                  u32 v_retval, u8 *msg, u16 msglen)
{
        struct i40e_pf *pf;
        struct i40e_hw *hw;
        int abs_vf_id;
        i40e_status aq_ret;

        /* validate the request */
        if (!vf || vf->vf_id >= vf->pf->num_alloc_vfs)
                return -EINVAL;

        pf = vf->pf;
        hw = &pf->hw;
        abs_vf_id = vf->vf_id + hw->func_caps.vf_base_id;

        /* single place to detect unsuccessful return values */
        if (v_retval) {
                vf->num_invalid_msgs++;
                dev_info(&pf->pdev->dev, "VF %d failed opcode %d, retval: %d\n",
                         vf->vf_id, v_opcode, v_retval);
                if (vf->num_invalid_msgs >
                    I40E_DEFAULT_NUM_INVALID_MSGS_ALLOWED) {
                        dev_err(&pf->pdev->dev,
                                "Number of invalid messages exceeded for VF %d\n",
                                vf->vf_id);
                        dev_err(&pf->pdev->dev, "Use PF Control I/F to enable the VF\n");
                        set_bit(I40E_VF_STATE_DISABLED, &vf->vf_states);
                }
        } else {
                vf->num_valid_msgs++;
                /* reset the invalid counter, if a valid message is received. */
                vf->num_invalid_msgs = 0;
        }

        aq_ret = i40e_aq_send_msg_to_vf(hw, abs_vf_id,  v_opcode, v_retval,
                                        msg, msglen, NULL);
        if (aq_ret) {
                dev_info(&pf->pdev->dev,
                         "Unable to send the message to VF %d aq_err %d\n",
                         vf->vf_id, pf->hw.aq.asq_last_status);
                return -EIO;
        }

        return 0;
}

/**
 * i40e_vc_send_resp_to_vf
 * @vf: pointer to the VF info
 * @opcode: operation code
 * @retval: return value
 *
 * send resp msg to VF
 **/
static int i40e_vc_send_resp_to_vf(struct i40e_vf *vf,
                                   enum virtchnl_ops opcode,
                                   i40e_status retval)
{
        return i40e_vc_send_msg_to_vf(vf, opcode, retval, NULL, 0);
}

/**
 * i40e_vc_get_version_msg
 * @vf: pointer to the VF info
 *
 * called from the VF to request the API version used by the PF
 **/
static int i40e_vc_get_version_msg(struct i40e_vf *vf, u8 *msg)
{
        struct virtchnl_version_info info = {
                VIRTCHNL_VERSION_MAJOR, VIRTCHNL_VERSION_MINOR
        };

        vf->vf_ver = *(struct virtchnl_version_info *)msg;
        /* VFs running the 1.0 API expect to get 1.0 back or they will cry. */
        if (VF_IS_V10(&vf->vf_ver))
                info.minor = VIRTCHNL_VERSION_MINOR_NO_VF_CAPS;
        return i40e_vc_send_msg_to_vf(vf, VIRTCHNL_OP_VERSION,
                                      I40E_SUCCESS, (u8 *)&info,
                                      sizeof(struct virtchnl_version_info));
}

/**
 * i40e_vc_get_vf_resources_msg
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * called from the VF to request its resources
 **/
static int i40e_vc_get_vf_resources_msg(struct i40e_vf *vf, u8 *msg)
{
        struct virtchnl_vf_resource *vfres = NULL;
        struct i40e_pf *pf = vf->pf;
        i40e_status aq_ret = 0;
        struct i40e_vsi *vsi;
        int num_vsis = 1;
        int len = 0;
        int ret;

        if (!test_bit(I40E_VF_STATE_INIT, &vf->vf_states)) {
                aq_ret = I40E_ERR_PARAM;
                goto err;
        }

        len = (sizeof(struct virtchnl_vf_resource) +
               sizeof(struct virtchnl_vsi_resource) * num_vsis);

        vfres = kzalloc(len, GFP_KERNEL);
        if (!vfres) {
                aq_ret = I40E_ERR_NO_MEMORY;
                len = 0;
                goto err;
        }
        if (VF_IS_V11(&vf->vf_ver))
                vf->driver_caps = *(u32 *)msg;
        else
                vf->driver_caps = VIRTCHNL_VF_OFFLOAD_L2 |
                                  VIRTCHNL_VF_OFFLOAD_RSS_REG |
                                  VIRTCHNL_VF_OFFLOAD_VLAN;

        vfres->vf_cap_flags = VIRTCHNL_VF_OFFLOAD_L2;
        vsi = pf->vsi[vf->lan_vsi_idx];
        if (!vsi->info.pvid)
                vfres->vf_cap_flags |= VIRTCHNL_VF_OFFLOAD_VLAN;

        if (i40e_vf_client_capable(pf, vf->vf_id) &&
            (vf->driver_caps & VIRTCHNL_VF_OFFLOAD_IWARP)) {
                vfres->vf_cap_flags |= VIRTCHNL_VF_OFFLOAD_IWARP;
                set_bit(I40E_VF_STATE_IWARPENA, &vf->vf_states);
        }

        if (vf->driver_caps & VIRTCHNL_VF_OFFLOAD_RSS_PF) {
                vfres->vf_cap_flags |= VIRTCHNL_VF_OFFLOAD_RSS_PF;
        } else {
                if ((pf->hw_features & I40E_HW_RSS_AQ_CAPABLE) &&
                    (vf->driver_caps & VIRTCHNL_VF_OFFLOAD_RSS_AQ))
                        vfres->vf_cap_flags |= VIRTCHNL_VF_OFFLOAD_RSS_AQ;
                else
                        vfres->vf_cap_flags |= VIRTCHNL_VF_OFFLOAD_RSS_REG;
        }

        if (pf->hw_features & I40E_HW_MULTIPLE_TCP_UDP_RSS_PCTYPE) {
                if (vf->driver_caps & VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2)
                        vfres->vf_cap_flags |=
                                VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2;
        }

        if (vf->driver_caps & VIRTCHNL_VF_OFFLOAD_ENCAP)
                vfres->vf_cap_flags |= VIRTCHNL_VF_OFFLOAD_ENCAP;

        if ((pf->hw_features & I40E_HW_OUTER_UDP_CSUM_CAPABLE) &&
            (vf->driver_caps & VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM))
                vfres->vf_cap_flags |= VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM;

        if (vf->driver_caps & VIRTCHNL_VF_OFFLOAD_RX_POLLING) {
                if (pf->flags & I40E_FLAG_MFP_ENABLED) {
                        dev_err(&pf->pdev->dev,
                                "VF %d requested polling mode: this feature is supported only when the device is running in single function per port (SFP) mode\n",
                                 vf->vf_id);
                        aq_ret = I40E_ERR_PARAM;
                        goto err;
                }
                vfres->vf_cap_flags |= VIRTCHNL_VF_OFFLOAD_RX_POLLING;
        }

        if (pf->hw_features & I40E_HW_WB_ON_ITR_CAPABLE) {
                if (vf->driver_caps & VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
                        vfres->vf_cap_flags |=
                                        VIRTCHNL_VF_OFFLOAD_WB_ON_ITR;
        }

        vfres->num_vsis = num_vsis;
        vfres->num_queue_pairs = vf->num_queue_pairs;
        vfres->max_vectors = pf->hw.func_caps.num_msix_vectors_vf;
        vfres->rss_key_size = I40E_HKEY_ARRAY_SIZE;
        vfres->rss_lut_size = I40E_VF_HLUT_ARRAY_SIZE;

        if (vf->lan_vsi_idx) {
                vfres->vsi_res[0].vsi_id = vf->lan_vsi_id;
                vfres->vsi_res[0].vsi_type = VIRTCHNL_VSI_SRIOV;
                vfres->vsi_res[0].num_queue_pairs = vsi->alloc_queue_pairs;
                /* VFs only use TC 0 */
                vfres->vsi_res[0].qset_handle
                                          = le16_to_cpu(vsi->info.qs_handle[0]);
                ether_addr_copy(vfres->vsi_res[0].default_mac_addr,
                                vf->default_lan_addr.addr);
        }
        set_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states);

err:
        /* send the response back to the VF */
        ret = i40e_vc_send_msg_to_vf(vf, VIRTCHNL_OP_GET_VF_RESOURCES,
                                     aq_ret, (u8 *)vfres, len);

        kfree(vfres);
        return ret;
}

/**
 * i40e_vc_reset_vf_msg
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * called from the VF to reset itself,
 * unlike other virtchnl messages, PF driver
 * doesn't send the response back to the VF
 **/
static void i40e_vc_reset_vf_msg(struct i40e_vf *vf)
{
        if (test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states))
                i40e_reset_vf(vf, false);
}

/**
 * i40e_getnum_vf_vsi_vlan_filters
 * @vsi: pointer to the vsi
 *
 * called to get the number of VLANs offloaded on this VF
 **/
static inline int i40e_getnum_vf_vsi_vlan_filters(struct i40e_vsi *vsi)
{
        struct i40e_mac_filter *f;
        int num_vlans = 0, bkt;

        hash_for_each(vsi->mac_filter_hash, bkt, f, hlist) {
                if (f->vlan >= 0 && f->vlan <= I40E_MAX_VLANID)
                        num_vlans++;
        }

        return num_vlans;
}

/**
 * i40e_vc_config_promiscuous_mode_msg
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * called from the VF to configure the promiscuous mode of
 * VF vsis
 **/
static int i40e_vc_config_promiscuous_mode_msg(struct i40e_vf *vf,
                                               u8 *msg, u16 msglen)
{
        struct virtchnl_promisc_info *info =
            (struct virtchnl_promisc_info *)msg;
        struct i40e_pf *pf = vf->pf;
        struct i40e_hw *hw = &pf->hw;
        struct i40e_mac_filter *f;
        i40e_status aq_ret = 0;
        bool allmulti = false;
        struct i40e_vsi *vsi;
        bool alluni = false;
        int aq_err = 0;
        int bkt;

        vsi = i40e_find_vsi_from_id(pf, info->vsi_id);
        if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states) ||
            !i40e_vc_isvalid_vsi_id(vf, info->vsi_id) ||
            !vsi) {
                aq_ret = I40E_ERR_PARAM;
                goto error_param;
        }
        if (!test_bit(I40E_VIRTCHNL_VF_CAP_PRIVILEGE, &vf->vf_caps)) {
                dev_err(&pf->pdev->dev,
                        "Unprivileged VF %d is attempting to configure promiscuous mode\n",
                        vf->vf_id);
                /* Lie to the VF on purpose. */
                aq_ret = 0;
                goto error_param;
        }
        /* Multicast promiscuous handling*/
        if (info->flags & FLAG_VF_MULTICAST_PROMISC)
                allmulti = true;

        if (vf->port_vlan_id) {
                aq_ret = i40e_aq_set_vsi_mc_promisc_on_vlan(hw, vsi->seid,
                                                            allmulti,
                                                            vf->port_vlan_id,
                                                            NULL);
        } else if (i40e_getnum_vf_vsi_vlan_filters(vsi)) {
                hash_for_each(vsi->mac_filter_hash, bkt, f, hlist) {
                        if (f->vlan < 0 || f->vlan > I40E_MAX_VLANID)
                                continue;
                        aq_ret = i40e_aq_set_vsi_mc_promisc_on_vlan(hw,
                                                                    vsi->seid,
                                                                    allmulti,
                                                                    f->vlan,
                                                                    NULL);
                        aq_err = pf->hw.aq.asq_last_status;
                        if (aq_ret) {
                                dev_err(&pf->pdev->dev,
                                        "Could not add VLAN %d to multicast promiscuous domain err %s aq_err %s\n",
                                        f->vlan,
                                        i40e_stat_str(&pf->hw, aq_ret),
                                        i40e_aq_str(&pf->hw, aq_err));
                                break;
                        }
                }
        } else {
                aq_ret = i40e_aq_set_vsi_multicast_promiscuous(hw, vsi->seid,
                                                               allmulti, NULL);
                aq_err = pf->hw.aq.asq_last_status;
                if (aq_ret) {
                        dev_err(&pf->pdev->dev,
                                "VF %d failed to set multicast promiscuous mode err %s aq_err %s\n",
                                vf->vf_id,
                                i40e_stat_str(&pf->hw, aq_ret),
                                i40e_aq_str(&pf->hw, aq_err));
                        goto error_param;
                }
        }

        if (!aq_ret) {
                dev_info(&pf->pdev->dev,
                         "VF %d successfully set multicast promiscuous mode\n",
                         vf->vf_id);
                if (allmulti)
                        set_bit(I40E_VF_STATE_MC_PROMISC, &vf->vf_states);
                else
                        clear_bit(I40E_VF_STATE_MC_PROMISC, &vf->vf_states);
        }

        if (info->flags & FLAG_VF_UNICAST_PROMISC)
                alluni = true;
        if (vf->port_vlan_id) {
                aq_ret = i40e_aq_set_vsi_uc_promisc_on_vlan(hw, vsi->seid,
                                                            alluni,
                                                            vf->port_vlan_id,
                                                            NULL);
        } else if (i40e_getnum_vf_vsi_vlan_filters(vsi)) {
                hash_for_each(vsi->mac_filter_hash, bkt, f, hlist) {
                        if (f->vlan < 0 || f->vlan > I40E_MAX_VLANID)
                                continue;
                        aq_ret = i40e_aq_set_vsi_uc_promisc_on_vlan(hw,
                                                                    vsi->seid,
                                                                    alluni,
                                                                    f->vlan,
                                                                    NULL);
                        aq_err = pf->hw.aq.asq_last_status;
                        if (aq_ret)
                                dev_err(&pf->pdev->dev,
                                        "Could not add VLAN %d to Unicast promiscuous domain err %s aq_err %s\n",
                                        f->vlan,
                                        i40e_stat_str(&pf->hw, aq_ret),
                                        i40e_aq_str(&pf->hw, aq_err));
                }
        } else {
                aq_ret = i40e_aq_set_vsi_unicast_promiscuous(hw, vsi->seid,
                                                             alluni, NULL,
                                                             true);
                aq_err = pf->hw.aq.asq_last_status;
                if (aq_ret) {
                        dev_err(&pf->pdev->dev,
                                "VF %d failed to set unicast promiscuous mode %8.8x err %s aq_err %s\n",
                                vf->vf_id, info->flags,
                                i40e_stat_str(&pf->hw, aq_ret),
                                i40e_aq_str(&pf->hw, aq_err));
                        goto error_param;
                }
        }

        if (!aq_ret) {
                dev_info(&pf->pdev->dev,
                         "VF %d successfully set unicast promiscuous mode\n",
                         vf->vf_id);
                if (alluni)
                        set_bit(I40E_VF_STATE_UC_PROMISC, &vf->vf_states);
                else
                        clear_bit(I40E_VF_STATE_UC_PROMISC, &vf->vf_states);
        }

error_param:
        /* send the response to the VF */
        return i40e_vc_send_resp_to_vf(vf,
                                       VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE,
                                       aq_ret);
}

/**
 * i40e_vc_config_queues_msg
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * called from the VF to configure the rx/tx
 * queues
 **/
static int i40e_vc_config_queues_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
{
        struct virtchnl_vsi_queue_config_info *qci =
            (struct virtchnl_vsi_queue_config_info *)msg;
        struct virtchnl_queue_pair_info *qpi;
        struct i40e_pf *pf = vf->pf;
        u16 vsi_id, vsi_queue_id;
        i40e_status aq_ret = 0;
        int i;

        if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states)) {
                aq_ret = I40E_ERR_PARAM;
                goto error_param;
        }

        vsi_id = qci->vsi_id;
        if (!i40e_vc_isvalid_vsi_id(vf, vsi_id)) {
                aq_ret = I40E_ERR_PARAM;
                goto error_param;
        }
        for (i = 0; i < qci->num_queue_pairs; i++) {
                qpi = &qci->qpair[i];
                vsi_queue_id = qpi->txq.queue_id;
                if ((qpi->txq.vsi_id != vsi_id) ||
                    (qpi->rxq.vsi_id != vsi_id) ||
                    (qpi->rxq.queue_id != vsi_queue_id) ||
                    !i40e_vc_isvalid_queue_id(vf, vsi_id, vsi_queue_id)) {
                        aq_ret = I40E_ERR_PARAM;
                        goto error_param;
                }

                if (i40e_config_vsi_rx_queue(vf, vsi_id, vsi_queue_id,
                                             &qpi->rxq) ||
                    i40e_config_vsi_tx_queue(vf, vsi_id, vsi_queue_id,
                                             &qpi->txq)) {
                        aq_ret = I40E_ERR_PARAM;
                        goto error_param;
                }
        }
        /* set vsi num_queue_pairs in use to num configured by VF */
        pf->vsi[vf->lan_vsi_idx]->num_queue_pairs = qci->num_queue_pairs;

error_param:
        /* send the response to the VF */
        return i40e_vc_send_resp_to_vf(vf, VIRTCHNL_OP_CONFIG_VSI_QUEUES,
                                       aq_ret);
}

/**
 * i40e_vc_config_irq_map_msg
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * called from the VF to configure the irq to
 * queue map
 **/
static int i40e_vc_config_irq_map_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
{
        struct virtchnl_irq_map_info *irqmap_info =
            (struct virtchnl_irq_map_info *)msg;
        struct virtchnl_vector_map *map;
        u16 vsi_id, vsi_queue_id, vector_id;
        i40e_status aq_ret = 0;
        unsigned long tempmap;
        int i;

        if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states)) {
                aq_ret = I40E_ERR_PARAM;
                goto error_param;
        }

        for (i = 0; i < irqmap_info->num_vectors; i++) {
                map = &irqmap_info->vecmap[i];

                vector_id = map->vector_id;
                vsi_id = map->vsi_id;
                /* validate msg params */
                if (!i40e_vc_isvalid_vector_id(vf, vector_id) ||
                    !i40e_vc_isvalid_vsi_id(vf, vsi_id)) {
                        aq_ret = I40E_ERR_PARAM;
                        goto error_param;
                }

                /* lookout for the invalid queue index */
                tempmap = map->rxq_map;
                for_each_set_bit(vsi_queue_id, &tempmap, I40E_MAX_VSI_QP) {
                        if (!i40e_vc_isvalid_queue_id(vf, vsi_id,
                                                      vsi_queue_id)) {
                                aq_ret = I40E_ERR_PARAM;
                                goto error_param;
                        }
                }

                tempmap = map->txq_map;
                for_each_set_bit(vsi_queue_id, &tempmap, I40E_MAX_VSI_QP) {
                        if (!i40e_vc_isvalid_queue_id(vf, vsi_id,
                                                      vsi_queue_id)) {
                                aq_ret = I40E_ERR_PARAM;
                                goto error_param;
                        }
                }

                i40e_config_irq_link_list(vf, vsi_id, map);
        }
error_param:
        /* send the response to the VF */
        return i40e_vc_send_resp_to_vf(vf, VIRTCHNL_OP_CONFIG_IRQ_MAP,
                                       aq_ret);
}

/**
 * i40e_vc_enable_queues_msg
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * called from the VF to enable all or specific queue(s)
 **/
static int i40e_vc_enable_queues_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
{
        struct virtchnl_queue_select *vqs =
            (struct virtchnl_queue_select *)msg;
        struct i40e_pf *pf = vf->pf;
        u16 vsi_id = vqs->vsi_id;
        i40e_status aq_ret = 0;

        if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states)) {
                aq_ret = I40E_ERR_PARAM;
                goto error_param;
        }

        if (!i40e_vc_isvalid_vsi_id(vf, vsi_id)) {
                aq_ret = I40E_ERR_PARAM;
                goto error_param;
        }

        if ((0 == vqs->rx_queues) && (0 == vqs->tx_queues)) {
                aq_ret = I40E_ERR_PARAM;
                goto error_param;
        }

        if (i40e_vsi_start_rings(pf->vsi[vf->lan_vsi_idx]))
                aq_ret = I40E_ERR_TIMEOUT;
error_param:
        /* send the response to the VF */
        return i40e_vc_send_resp_to_vf(vf, VIRTCHNL_OP_ENABLE_QUEUES,
                                       aq_ret);
}

/**
 * i40e_vc_disable_queues_msg
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * called from the VF to disable all or specific
 * queue(s)
 **/
static int i40e_vc_disable_queues_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
{
        struct virtchnl_queue_select *vqs =
            (struct virtchnl_queue_select *)msg;
        struct i40e_pf *pf = vf->pf;
        i40e_status aq_ret = 0;

        if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states)) {
                aq_ret = I40E_ERR_PARAM;
                goto error_param;
        }

        if (!i40e_vc_isvalid_vsi_id(vf, vqs->vsi_id)) {
                aq_ret = I40E_ERR_PARAM;
                goto error_param;
        }

        if ((0 == vqs->rx_queues) && (0 == vqs->tx_queues)) {
                aq_ret = I40E_ERR_PARAM;
                goto error_param;
        }

        i40e_vsi_stop_rings(pf->vsi[vf->lan_vsi_idx]);

error_param:
        /* send the response to the VF */
        return i40e_vc_send_resp_to_vf(vf, VIRTCHNL_OP_DISABLE_QUEUES,
                                       aq_ret);
}

/**
 * i40e_vc_get_stats_msg
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * called from the VF to get vsi stats
 **/
static int i40e_vc_get_stats_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
{
        struct virtchnl_queue_select *vqs =
            (struct virtchnl_queue_select *)msg;

        struct i40e_pf *pf = vf->pf;
        struct i40e_eth_stats stats;
        i40e_status aq_ret = 0;
        struct i40e_vsi *vsi;

        memset(&stats, 0, sizeof(struct i40e_eth_stats));

        if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states)) {
                aq_ret = I40E_ERR_PARAM;
                goto error_param;
        }

        if (!i40e_vc_isvalid_vsi_id(vf, vqs->vsi_id)) {
                aq_ret = I40E_ERR_PARAM;
                goto error_param;
        }

        vsi = pf->vsi[vf->lan_vsi_idx];
        if (!vsi) {
                aq_ret = I40E_ERR_PARAM;
                goto error_param;
        }
        i40e_update_eth_stats(vsi);
        stats = vsi->eth_stats;

error_param:
        /* send the response back to the VF */
        return i40e_vc_send_msg_to_vf(vf, VIRTCHNL_OP_GET_STATS, aq_ret,
                                      (u8 *)&stats, sizeof(stats));
}

/* If the VF is not trusted restrict the number of MAC/VLAN it can program */
#define I40E_VC_MAX_MAC_ADDR_PER_VF 12
#define I40E_VC_MAX_VLAN_PER_VF 8

/**
 * i40e_check_vf_permission
 * @vf: pointer to the VF info
 * @macaddr: pointer to the MAC Address being checked
 *
 * Check if the VF has permission to add or delete unicast MAC address
 * filters and return error code -EPERM if not.  Then check if the
 * address filter requested is broadcast or zero and if so return
 * an invalid MAC address error code.
 **/
static inline int i40e_check_vf_permission(struct i40e_vf *vf, u8 *macaddr)
{
        struct i40e_pf *pf = vf->pf;
        int ret = 0;

        if (is_broadcast_ether_addr(macaddr) ||
                   is_zero_ether_addr(macaddr)) {
                dev_err(&pf->pdev->dev, "invalid VF MAC addr %pM\n", macaddr);
                ret = I40E_ERR_INVALID_MAC_ADDR;
        } else if (vf->pf_set_mac && !is_multicast_ether_addr(macaddr) &&
                   !test_bit(I40E_VIRTCHNL_VF_CAP_PRIVILEGE, &vf->vf_caps) &&
                   !ether_addr_equal(macaddr, vf->default_lan_addr.addr)) {
                /* If the host VMM administrator has set the VF MAC address
                 * administratively via the ndo_set_vf_mac command then deny
                 * permission to the VF to add or delete unicast MAC addresses.
                 * Unless the VF is privileged and then it can do whatever.
                 * The VF may request to set the MAC address filter already
                 * assigned to it so do not return an error in that case.
                 */
                dev_err(&pf->pdev->dev,
                        "VF attempting to override administratively set MAC address, reload the VF driver to resume normal operation\n");
                ret = -EPERM;
        } else if ((vf->num_mac >= I40E_VC_MAX_MAC_ADDR_PER_VF) &&
                   !test_bit(I40E_VIRTCHNL_VF_CAP_PRIVILEGE, &vf->vf_caps)) {
                dev_err(&pf->pdev->dev,
                        "VF is not trusted, switch the VF to trusted to add more functionality\n");
                ret = -EPERM;
        }
        return ret;
}

/**
 * i40e_vc_add_mac_addr_msg
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * add guest mac address filter
 **/
static int i40e_vc_add_mac_addr_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
{
        struct virtchnl_ether_addr_list *al =
            (struct virtchnl_ether_addr_list *)msg;
        struct i40e_pf *pf = vf->pf;
        struct i40e_vsi *vsi = NULL;
        u16 vsi_id = al->vsi_id;
        i40e_status ret = 0;
        int i;

        if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states) ||
            !i40e_vc_isvalid_vsi_id(vf, vsi_id)) {
                ret = I40E_ERR_PARAM;
                goto error_param;
        }

        for (i = 0; i < al->num_elements; i++) {
                ret = i40e_check_vf_permission(vf, al->list[i].addr);
                if (ret)
                        goto error_param;
        }
        vsi = pf->vsi[vf->lan_vsi_idx];

        /* Lock once, because all function inside for loop accesses VSI's
         * MAC filter list which needs to be protected using same lock.
         */
        spin_lock_bh(&vsi->mac_filter_hash_lock);

        /* add new addresses to the list */
        for (i = 0; i < al->num_elements; i++) {
                struct i40e_mac_filter *f;

                f = i40e_find_mac(vsi, al->list[i].addr);
                if (!f)
                        f = i40e_add_mac_filter(vsi, al->list[i].addr);

                if (!f) {
                        dev_err(&pf->pdev->dev,
                                "Unable to add MAC filter %pM for VF %d\n",
                                 al->list[i].addr, vf->vf_id);
                        ret = I40E_ERR_PARAM;
                        spin_unlock_bh(&vsi->mac_filter_hash_lock);
                        goto error_param;
                } else {
                        vf->num_mac++;
                }
        }
        spin_unlock_bh(&vsi->mac_filter_hash_lock);

        /* program the updated filter list */
        ret = i40e_sync_vsi_filters(vsi);
        if (ret)
                dev_err(&pf->pdev->dev, "Unable to program VF %d MAC filters, error %d\n",
                        vf->vf_id, ret);

error_param:
        /* send the response to the VF */
        return i40e_vc_send_resp_to_vf(vf, VIRTCHNL_OP_ADD_ETH_ADDR,
                                       ret);
}

/**
 * i40e_vc_del_mac_addr_msg
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * remove guest mac address filter
 **/
static int i40e_vc_del_mac_addr_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
{
        struct virtchnl_ether_addr_list *al =
            (struct virtchnl_ether_addr_list *)msg;
        struct i40e_pf *pf = vf->pf;
        struct i40e_vsi *vsi = NULL;
        u16 vsi_id = al->vsi_id;
        i40e_status ret = 0;
        int i;

        if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states) ||
            !i40e_vc_isvalid_vsi_id(vf, vsi_id)) {
                ret = I40E_ERR_PARAM;
                goto error_param;
        }

        for (i = 0; i < al->num_elements; i++) {
                if (is_broadcast_ether_addr(al->list[i].addr) ||
                    is_zero_ether_addr(al->list[i].addr)) {
                        dev_err(&pf->pdev->dev, "Invalid MAC addr %pM for VF %d\n",
                                al->list[i].addr, vf->vf_id);
                        ret = I40E_ERR_INVALID_MAC_ADDR;
                        goto error_param;
                }
        }
        vsi = pf->vsi[vf->lan_vsi_idx];

        spin_lock_bh(&vsi->mac_filter_hash_lock);
        /* delete addresses from the list */
        for (i = 0; i < al->num_elements; i++)
                if (i40e_del_mac_filter(vsi, al->list[i].addr)) {
                        ret = I40E_ERR_INVALID_MAC_ADDR;
                        spin_unlock_bh(&vsi->mac_filter_hash_lock);
                        goto error_param;
                } else {
                        vf->num_mac--;
                }

        spin_unlock_bh(&vsi->mac_filter_hash_lock);

        /* program the updated filter list */
        ret = i40e_sync_vsi_filters(vsi);
        if (ret)
                dev_err(&pf->pdev->dev, "Unable to program VF %d MAC filters, error %d\n",
                        vf->vf_id, ret);

error_param:
        /* send the response to the VF */
        return i40e_vc_send_resp_to_vf(vf, VIRTCHNL_OP_DEL_ETH_ADDR,
                                       ret);
}

/**
 * i40e_vc_add_vlan_msg
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * program guest vlan id
 **/
static int i40e_vc_add_vlan_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
{
        struct virtchnl_vlan_filter_list *vfl =
            (struct virtchnl_vlan_filter_list *)msg;
        struct i40e_pf *pf = vf->pf;
        struct i40e_vsi *vsi = NULL;
        u16 vsi_id = vfl->vsi_id;
        i40e_status aq_ret = 0;
        int i;

        if ((vf->num_vlan >= I40E_VC_MAX_VLAN_PER_VF) &&
            !test_bit(I40E_VIRTCHNL_VF_CAP_PRIVILEGE, &vf->vf_caps)) {
                dev_err(&pf->pdev->dev,
                        "VF is not trusted, switch the VF to trusted to add more VLAN addresses\n");
                goto error_param;
        }
        if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states) ||
            !i40e_vc_isvalid_vsi_id(vf, vsi_id)) {
                aq_ret = I40E_ERR_PARAM;
                goto error_param;
        }

        for (i = 0; i < vfl->num_elements; i++) {
                if (vfl->vlan_id[i] > I40E_MAX_VLANID) {
                        aq_ret = I40E_ERR_PARAM;
                        dev_err(&pf->pdev->dev,
                                "invalid VF VLAN id %d\n", vfl->vlan_id[i]);
                        goto error_param;
                }
        }
        vsi = pf->vsi[vf->lan_vsi_idx];
        if (vsi->info.pvid) {
                aq_ret = I40E_ERR_PARAM;
                goto error_param;
        }

        i40e_vlan_stripping_enable(vsi);
        for (i = 0; i < vfl->num_elements; i++) {
                /* add new VLAN filter */
                int ret = i40e_vsi_add_vlan(vsi, vfl->vlan_id[i]);
                if (!ret)
                        vf->num_vlan++;

                if (test_bit(I40E_VF_STATE_UC_PROMISC, &vf->vf_states))
                        i40e_aq_set_vsi_uc_promisc_on_vlan(&pf->hw, vsi->seid,
                                                           true,
                                                           vfl->vlan_id[i],
                                                           NULL);
                if (test_bit(I40E_VF_STATE_MC_PROMISC, &vf->vf_states))
                        i40e_aq_set_vsi_mc_promisc_on_vlan(&pf->hw, vsi->seid,
                                                           true,
                                                           vfl->vlan_id[i],
                                                           NULL);

                if (ret)
                        dev_err(&pf->pdev->dev,
                                "Unable to add VLAN filter %d for VF %d, error %d\n",
                                vfl->vlan_id[i], vf->vf_id, ret);
        }

error_param:
        /* send the response to the VF */
        return i40e_vc_send_resp_to_vf(vf, VIRTCHNL_OP_ADD_VLAN, aq_ret);
}

/**
 * i40e_vc_remove_vlan_msg
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * remove programmed guest vlan id
 **/
static int i40e_vc_remove_vlan_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
{
        struct virtchnl_vlan_filter_list *vfl =
            (struct virtchnl_vlan_filter_list *)msg;
        struct i40e_pf *pf = vf->pf;
        struct i40e_vsi *vsi = NULL;
        u16 vsi_id = vfl->vsi_id;
        i40e_status aq_ret = 0;
        int i;

        if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states) ||
            !i40e_vc_isvalid_vsi_id(vf, vsi_id)) {
                aq_ret = I40E_ERR_PARAM;
                goto error_param;
        }

        for (i = 0; i < vfl->num_elements; i++) {
                if (vfl->vlan_id[i] > I40E_MAX_VLANID) {
                        aq_ret = I40E_ERR_PARAM;
                        goto error_param;
                }
        }

        vsi = pf->vsi[vf->lan_vsi_idx];
        if (vsi->info.pvid) {
                aq_ret = I40E_ERR_PARAM;
                goto error_param;
        }

        for (i = 0; i < vfl->num_elements; i++) {
                i40e_vsi_kill_vlan(vsi, vfl->vlan_id[i]);
                vf->num_vlan--;

                if (test_bit(I40E_VF_STATE_UC_PROMISC, &vf->vf_states))
                        i40e_aq_set_vsi_uc_promisc_on_vlan(&pf->hw, vsi->seid,
                                                           false,
                                                           vfl->vlan_id[i],
                                                           NULL);
                if (test_bit(I40E_VF_STATE_MC_PROMISC, &vf->vf_states))
                        i40e_aq_set_vsi_mc_promisc_on_vlan(&pf->hw, vsi->seid,
                                                           false,
                                                           vfl->vlan_id[i],
                                                           NULL);
        }

error_param:
        /* send the response to the VF */
        return i40e_vc_send_resp_to_vf(vf, VIRTCHNL_OP_DEL_VLAN, aq_ret);
}

/**
 * i40e_vc_iwarp_msg
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * called from the VF for the iwarp msgs
 **/
static int i40e_vc_iwarp_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
{
        struct i40e_pf *pf = vf->pf;
        int abs_vf_id = vf->vf_id + pf->hw.func_caps.vf_base_id;
        i40e_status aq_ret = 0;

        if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states) ||
            !test_bit(I40E_VF_STATE_IWARPENA, &vf->vf_states)) {
                aq_ret = I40E_ERR_PARAM;
                goto error_param;
        }

        i40e_notify_client_of_vf_msg(pf->vsi[pf->lan_vsi], abs_vf_id,
                                     msg, msglen);

error_param:
        /* send the response to the VF */
        return i40e_vc_send_resp_to_vf(vf, VIRTCHNL_OP_IWARP,
                                       aq_ret);
}

/**
 * i40e_vc_iwarp_qvmap_msg
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 * @config: config qvmap or release it
 *
 * called from the VF for the iwarp msgs
 **/
static int i40e_vc_iwarp_qvmap_msg(struct i40e_vf *vf, u8 *msg, u16 msglen,
                                   bool config)
{
        struct virtchnl_iwarp_qvlist_info *qvlist_info =
                                (struct virtchnl_iwarp_qvlist_info *)msg;
        i40e_status aq_ret = 0;

        if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states) ||
            !test_bit(I40E_VF_STATE_IWARPENA, &vf->vf_states)) {
                aq_ret = I40E_ERR_PARAM;
                goto error_param;
        }

        if (config) {
                if (i40e_config_iwarp_qvlist(vf, qvlist_info))
                        aq_ret = I40E_ERR_PARAM;
        } else {
                i40e_release_iwarp_qvlist(vf);
        }

error_param:
        /* send the response to the VF */
        return i40e_vc_send_resp_to_vf(vf,
                               config ? VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP :
                               VIRTCHNL_OP_RELEASE_IWARP_IRQ_MAP,
                               aq_ret);
}

/**
 * i40e_vc_config_rss_key
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * Configure the VF's RSS key
 **/
static int i40e_vc_config_rss_key(struct i40e_vf *vf, u8 *msg, u16 msglen)
{
        struct virtchnl_rss_key *vrk =
                (struct virtchnl_rss_key *)msg;
        struct i40e_pf *pf = vf->pf;
        struct i40e_vsi *vsi = NULL;
        u16 vsi_id = vrk->vsi_id;
        i40e_status aq_ret = 0;

        if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states) ||
            !i40e_vc_isvalid_vsi_id(vf, vsi_id) ||
            (vrk->key_len != I40E_HKEY_ARRAY_SIZE)) {
                aq_ret = I40E_ERR_PARAM;
                goto err;
        }

        vsi = pf->vsi[vf->lan_vsi_idx];
        aq_ret = i40e_config_rss(vsi, vrk->key, NULL, 0);
err:
        /* send the response to the VF */
        return i40e_vc_send_resp_to_vf(vf, VIRTCHNL_OP_CONFIG_RSS_KEY,
                                       aq_ret);
}

/**
 * i40e_vc_config_rss_lut
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * Configure the VF's RSS LUT
 **/
static int i40e_vc_config_rss_lut(struct i40e_vf *vf, u8 *msg, u16 msglen)
{
        struct virtchnl_rss_lut *vrl =
                (struct virtchnl_rss_lut *)msg;
        struct i40e_pf *pf = vf->pf;
        struct i40e_vsi *vsi = NULL;
        u16 vsi_id = vrl->vsi_id;
        i40e_status aq_ret = 0;

        if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states) ||
            !i40e_vc_isvalid_vsi_id(vf, vsi_id) ||
            (vrl->lut_entries != I40E_VF_HLUT_ARRAY_SIZE)) {
                aq_ret = I40E_ERR_PARAM;
                goto err;
        }

        vsi = pf->vsi[vf->lan_vsi_idx];
        aq_ret = i40e_config_rss(vsi, NULL, vrl->lut, I40E_VF_HLUT_ARRAY_SIZE);
        /* send the response to the VF */
err:
        return i40e_vc_send_resp_to_vf(vf, VIRTCHNL_OP_CONFIG_RSS_LUT,
                                       aq_ret);
}

/**
 * i40e_vc_get_rss_hena
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * Return the RSS HENA bits allowed by the hardware
 **/
static int i40e_vc_get_rss_hena(struct i40e_vf *vf, u8 *msg, u16 msglen)
{
        struct virtchnl_rss_hena *vrh = NULL;
        struct i40e_pf *pf = vf->pf;
        i40e_status aq_ret = 0;
        int len = 0;

        if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states)) {
                aq_ret = I40E_ERR_PARAM;
                goto err;
        }
        len = sizeof(struct virtchnl_rss_hena);

        vrh = kzalloc(len, GFP_KERNEL);
        if (!vrh) {
                aq_ret = I40E_ERR_NO_MEMORY;
                len = 0;
                goto err;
        }
        vrh->hena = i40e_pf_get_default_rss_hena(pf);
err:
        /* send the response back to the VF */
        aq_ret = i40e_vc_send_msg_to_vf(vf, VIRTCHNL_OP_GET_RSS_HENA_CAPS,
                                        aq_ret, (u8 *)vrh, len);
        kfree(vrh);
        return aq_ret;
}

/**
 * i40e_vc_set_rss_hena
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * Set the RSS HENA bits for the VF
 **/
static int i40e_vc_set_rss_hena(struct i40e_vf *vf, u8 *msg, u16 msglen)
{
        struct virtchnl_rss_hena *vrh =
                (struct virtchnl_rss_hena *)msg;
        struct i40e_pf *pf = vf->pf;
        struct i40e_hw *hw = &pf->hw;
        i40e_status aq_ret = 0;

        if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states)) {
                aq_ret = I40E_ERR_PARAM;
                goto err;
        }
        i40e_write_rx_ctl(hw, I40E_VFQF_HENA1(0, vf->vf_id), (u32)vrh->hena);
        i40e_write_rx_ctl(hw, I40E_VFQF_HENA1(1, vf->vf_id),
                          (u32)(vrh->hena >> 32));

        /* send the response to the VF */
err:
        return i40e_vc_send_resp_to_vf(vf, VIRTCHNL_OP_SET_RSS_HENA, aq_ret);
}

/**
 * i40e_vc_enable_vlan_stripping
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * Enable vlan header stripping for the VF
 **/
static int i40e_vc_enable_vlan_stripping(struct i40e_vf *vf, u8 *msg,
                                         u16 msglen)
{
        struct i40e_vsi *vsi = vf->pf->vsi[vf->lan_vsi_idx];
        i40e_status aq_ret = 0;

        if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states)) {
                aq_ret = I40E_ERR_PARAM;
                goto err;
        }

        i40e_vlan_stripping_enable(vsi);

        /* send the response to the VF */
err:
        return i40e_vc_send_resp_to_vf(vf, VIRTCHNL_OP_ENABLE_VLAN_STRIPPING,
                                       aq_ret);
}

/**
 * i40e_vc_disable_vlan_stripping
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * Disable vlan header stripping for the VF
 **/
static int i40e_vc_disable_vlan_stripping(struct i40e_vf *vf, u8 *msg,
                                          u16 msglen)
{
        struct i40e_vsi *vsi = vf->pf->vsi[vf->lan_vsi_idx];
        i40e_status aq_ret = 0;

        if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states)) {
                aq_ret = I40E_ERR_PARAM;
                goto err;
        }

        i40e_vlan_stripping_disable(vsi);

        /* send the response to the VF */
err:
        return i40e_vc_send_resp_to_vf(vf, VIRTCHNL_OP_DISABLE_VLAN_STRIPPING,
                                       aq_ret);
}

/**
 * i40e_vc_process_vf_msg
 * @pf: pointer to the PF structure
 * @vf_id: source VF id
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 * @msghndl: msg handle
 *
 * called from the common aeq/arq handler to
 * process request from VF
 **/
int i40e_vc_process_vf_msg(struct i40e_pf *pf, s16 vf_id, u32 v_opcode,
                           u32 v_retval, u8 *msg, u16 msglen)
{
        struct i40e_hw *hw = &pf->hw;
        int local_vf_id = vf_id - (s16)hw->func_caps.vf_base_id;
        struct i40e_vf *vf;
        int ret;

        pf->vf_aq_requests++;
        if (local_vf_id >= pf->num_alloc_vfs)
                return -EINVAL;
        vf = &(pf->vf[local_vf_id]);

        /* Check if VF is disabled. */
        if (test_bit(I40E_VF_STATE_DISABLED, &vf->vf_states))
                return I40E_ERR_PARAM;

        /* perform basic checks on the msg */
        ret = virtchnl_vc_validate_vf_msg(&vf->vf_ver, v_opcode, msg, msglen);

        /* perform additional checks specific to this driver */
        if (v_opcode == VIRTCHNL_OP_CONFIG_RSS_KEY) {
                struct virtchnl_rss_key *vrk = (struct virtchnl_rss_key *)msg;

                if (vrk->key_len != I40E_HKEY_ARRAY_SIZE)
                        ret = -EINVAL;
        } else if (v_opcode == VIRTCHNL_OP_CONFIG_RSS_LUT) {
                struct virtchnl_rss_lut *vrl = (struct virtchnl_rss_lut *)msg;

                if (vrl->lut_entries != I40E_VF_HLUT_ARRAY_SIZE)
                        ret = -EINVAL;
        }

        if (ret) {
                i40e_vc_send_resp_to_vf(vf, v_opcode, I40E_ERR_PARAM);
                dev_err(&pf->pdev->dev, "Invalid message from VF %d, opcode %d, len %d\n",
                        local_vf_id, v_opcode, msglen);
                switch (ret) {
                case VIRTCHNL_ERR_PARAM:
                        return -EPERM;
                default:
                        return -EINVAL;
                }
        }

        switch (v_opcode) {
        case VIRTCHNL_OP_VERSION:
                ret = i40e_vc_get_version_msg(vf, msg);
                break;
        case VIRTCHNL_OP_GET_VF_RESOURCES:
                ret = i40e_vc_get_vf_resources_msg(vf, msg);
                break;
        case VIRTCHNL_OP_RESET_VF:
                i40e_vc_reset_vf_msg(vf);
                ret = 0;
                break;
        case VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE:
                ret = i40e_vc_config_promiscuous_mode_msg(vf, msg, msglen);
                break;
        case VIRTCHNL_OP_CONFIG_VSI_QUEUES:
                ret = i40e_vc_config_queues_msg(vf, msg, msglen);
                break;
        case VIRTCHNL_OP_CONFIG_IRQ_MAP:
                ret = i40e_vc_config_irq_map_msg(vf, msg, msglen);
                break;
        case VIRTCHNL_OP_ENABLE_QUEUES:
                ret = i40e_vc_enable_queues_msg(vf, msg, msglen);
                i40e_vc_notify_vf_link_state(vf);
                break;
        case VIRTCHNL_OP_DISABLE_QUEUES:
                ret = i40e_vc_disable_queues_msg(vf, msg, msglen);
                break;
        case VIRTCHNL_OP_ADD_ETH_ADDR:
                ret = i40e_vc_add_mac_addr_msg(vf, msg, msglen);
                break;
        case VIRTCHNL_OP_DEL_ETH_ADDR:
                ret = i40e_vc_del_mac_addr_msg(vf, msg, msglen);
                break;
        case VIRTCHNL_OP_ADD_VLAN:
                ret = i40e_vc_add_vlan_msg(vf, msg, msglen);
                break;
        case VIRTCHNL_OP_DEL_VLAN:
                ret = i40e_vc_remove_vlan_msg(vf, msg, msglen);
                break;
        case VIRTCHNL_OP_GET_STATS:
                ret = i40e_vc_get_stats_msg(vf, msg, msglen);
                break;
        case VIRTCHNL_OP_IWARP:
                ret = i40e_vc_iwarp_msg(vf, msg, msglen);
                break;
        case VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP:
                ret = i40e_vc_iwarp_qvmap_msg(vf, msg, msglen, true);
                break;
        case VIRTCHNL_OP_RELEASE_IWARP_IRQ_MAP:
                ret = i40e_vc_iwarp_qvmap_msg(vf, msg, msglen, false);
                break;
        case VIRTCHNL_OP_CONFIG_RSS_KEY:
                ret = i40e_vc_config_rss_key(vf, msg, msglen);
                break;
        case VIRTCHNL_OP_CONFIG_RSS_LUT:
                ret = i40e_vc_config_rss_lut(vf, msg, msglen);
                break;
        case VIRTCHNL_OP_GET_RSS_HENA_CAPS:
                ret = i40e_vc_get_rss_hena(vf, msg, msglen);
                break;
        case VIRTCHNL_OP_SET_RSS_HENA:
                ret = i40e_vc_set_rss_hena(vf, msg, msglen);
                break;
        case VIRTCHNL_OP_ENABLE_VLAN_STRIPPING:
                ret = i40e_vc_enable_vlan_stripping(vf, msg, msglen);
                break;
        case VIRTCHNL_OP_DISABLE_VLAN_STRIPPING:
                ret = i40e_vc_disable_vlan_stripping(vf, msg, msglen);
                break;

        case VIRTCHNL_OP_UNKNOWN:
        default:
                dev_err(&pf->pdev->dev, "Unsupported opcode %d from VF %d\n",
                        v_opcode, local_vf_id);
                ret = i40e_vc_send_resp_to_vf(vf, v_opcode,
                                              I40E_ERR_NOT_IMPLEMENTED);
                break;
        }

        return ret;
}

/**
 * i40e_vc_process_vflr_event
 * @pf: pointer to the PF structure
 *
 * called from the vlfr irq handler to
 * free up VF resources and state variables
 **/
int i40e_vc_process_vflr_event(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        u32 reg, reg_idx, bit_idx;
        struct i40e_vf *vf;
        int vf_id;

        if (!test_bit(__I40E_VFLR_EVENT_PENDING, pf->state))
                return 0;

        /* Re-enable the VFLR interrupt cause here, before looking for which
         * VF got reset. Otherwise, if another VF gets a reset while the
         * first one is being processed, that interrupt will be lost, and
         * that VF will be stuck in reset forever.
         */
        reg = rd32(hw, I40E_PFINT_ICR0_ENA);
        reg |= I40E_PFINT_ICR0_ENA_VFLR_MASK;
        wr32(hw, I40E_PFINT_ICR0_ENA, reg);
        i40e_flush(hw);

        clear_bit(__I40E_VFLR_EVENT_PENDING, pf->state);
        for (vf_id = 0; vf_id < pf->num_alloc_vfs; vf_id++) {
                reg_idx = (hw->func_caps.vf_base_id + vf_id) / 32;
                bit_idx = (hw->func_caps.vf_base_id + vf_id) % 32;
                /* read GLGEN_VFLRSTAT register to find out the flr VFs */
                vf = &pf->vf[vf_id];
                reg = rd32(hw, I40E_GLGEN_VFLRSTAT(reg_idx));
                if (reg & BIT(bit_idx))
                        /* i40e_reset_vf will clear the bit in GLGEN_VFLRSTAT */
                        i40e_reset_vf(vf, true);
        }

        return 0;
}

/**
 * i40e_ndo_set_vf_mac
 * @netdev: network interface device structure
 * @vf_id: VF identifier
 * @mac: mac address
 *
 * program VF mac address
 **/
int i40e_ndo_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        struct i40e_mac_filter *f;
        struct i40e_vf *vf;
        int ret = 0;
        int bkt;

        /* validate the request */
        if (vf_id >= pf->num_alloc_vfs) {
                dev_err(&pf->pdev->dev,
                        "Invalid VF Identifier %d\n", vf_id);
                ret = -EINVAL;
                goto error_param;
        }

        vf = &(pf->vf[vf_id]);
        vsi = pf->vsi[vf->lan_vsi_idx];
        if (!test_bit(I40E_VF_STATE_INIT, &vf->vf_states)) {
                dev_err(&pf->pdev->dev, "VF %d still in reset. Try again.\n",
                        vf_id);
                ret = -EAGAIN;
                goto error_param;
        }

        if (is_multicast_ether_addr(mac)) {
                dev_err(&pf->pdev->dev,
                        "Invalid Ethernet address %pM for VF %d\n", mac, vf_id);
                ret = -EINVAL;
                goto error_param;
        }

        /* Lock once because below invoked function add/del_filter requires
         * mac_filter_hash_lock to be held
         */
        spin_lock_bh(&vsi->mac_filter_hash_lock);

        /* delete the temporary mac address */
        if (!is_zero_ether_addr(vf->default_lan_addr.addr))
                i40e_del_mac_filter(vsi, vf->default_lan_addr.addr);

        /* Delete all the filters for this VSI - we're going to kill it
         * anyway.
         */
        hash_for_each(vsi->mac_filter_hash, bkt, f, hlist)
                __i40e_del_filter(vsi, f);

        spin_unlock_bh(&vsi->mac_filter_hash_lock);

        /* program mac filter */
        if (i40e_sync_vsi_filters(vsi)) {
                dev_err(&pf->pdev->dev, "Unable to program ucast filters\n");
                ret = -EIO;
                goto error_param;
        }
        ether_addr_copy(vf->default_lan_addr.addr, mac);

        if (is_zero_ether_addr(mac)) {
                vf->pf_set_mac = false;
                dev_info(&pf->pdev->dev, "Removing MAC on VF %d\n", vf_id);
        } else {
                vf->pf_set_mac = true;
                dev_info(&pf->pdev->dev, "Setting MAC %pM on VF %d\n",
                         mac, vf_id);
        }

        /* Force the VF driver stop so it has to reload with new MAC address */
        i40e_vc_disable_vf(pf, vf);
        dev_info(&pf->pdev->dev, "Reload the VF driver to make this change effective.\n");

error_param:
        return ret;
}

/**
 * i40e_ndo_set_vf_port_vlan
 * @netdev: network interface device structure
 * @vf_id: VF identifier
 * @vlan_id: mac address
 * @qos: priority setting
 * @vlan_proto: vlan protocol
 *
 * program VF vlan id and/or qos
 **/
int i40e_ndo_set_vf_port_vlan(struct net_device *netdev, int vf_id,
                              u16 vlan_id, u8 qos, __be16 vlan_proto)
{
        u16 vlanprio = vlan_id | (qos << I40E_VLAN_PRIORITY_SHIFT);
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_pf *pf = np->vsi->back;
        struct i40e_vsi *vsi;
        struct i40e_vf *vf;
        int ret = 0;

        /* validate the request */
        if (vf_id >= pf->num_alloc_vfs) {
                dev_err(&pf->pdev->dev, "Invalid VF Identifier %d\n", vf_id);
                ret = -EINVAL;
                goto error_pvid;
        }

        if ((vlan_id > I40E_MAX_VLANID) || (qos > 7)) {
                dev_err(&pf->pdev->dev, "Invalid VF Parameters\n");
                ret = -EINVAL;
                goto error_pvid;
        }

        if (vlan_proto != htons(ETH_P_8021Q)) {
                dev_err(&pf->pdev->dev, "VF VLAN protocol is not supported\n");
                ret = -EPROTONOSUPPORT;
                goto error_pvid;
        }

        vf = &(pf->vf[vf_id]);
        vsi = pf->vsi[vf->lan_vsi_idx];
        if (!test_bit(I40E_VF_STATE_INIT, &vf->vf_states)) {
                dev_err(&pf->pdev->dev, "VF %d still in reset. Try again.\n",
                        vf_id);
                ret = -EAGAIN;
                goto error_pvid;
        }

        if (le16_to_cpu(vsi->info.pvid) == vlanprio)
                /* duplicate request, so just return success */
                goto error_pvid;

        /* Locked once because multiple functions below iterate list */
        spin_lock_bh(&vsi->mac_filter_hash_lock);

        if (le16_to_cpu(vsi->info.pvid) == 0 && i40e_is_vsi_in_vlan(vsi)) {
                dev_err(&pf->pdev->dev,
                        "VF %d has already configured VLAN filters and the administrator is requesting a port VLAN override.\nPlease unload and reload the VF driver for this change to take effect.\n",
                        vf_id);
                /* Administrator Error - knock the VF offline until he does
                 * the right thing by reconfiguring his network correctly
                 * and then reloading the VF driver.
                 */
                i40e_vc_disable_vf(pf, vf);
                /* During reset the VF got a new VSI, so refresh the pointer. */
                vsi = pf->vsi[vf->lan_vsi_idx];
        }

        /* Check for condition where there was already a port VLAN ID
         * filter set and now it is being deleted by setting it to zero.
         * Additionally check for the condition where there was a port
         * VLAN but now there is a new and different port VLAN being set.
         * Before deleting all the old VLAN filters we must add new ones
         * with -1 (I40E_VLAN_ANY) or otherwise we're left with all our
         * MAC addresses deleted.
         */
        if ((!(vlan_id || qos) ||
            vlanprio != le16_to_cpu(vsi->info.pvid)) &&
            vsi->info.pvid) {
                ret = i40e_add_vlan_all_mac(vsi, I40E_VLAN_ANY);
                if (ret) {
                        dev_info(&vsi->back->pdev->dev,
                                 "add VF VLAN failed, ret=%d aq_err=%d\n", ret,
                                 vsi->back->hw.aq.asq_last_status);
                        spin_unlock_bh(&vsi->mac_filter_hash_lock);
                        goto error_pvid;
                }
        }

        if (vsi->info.pvid) {
                /* remove all filters on the old VLAN */
                i40e_rm_vlan_all_mac(vsi, (le16_to_cpu(vsi->info.pvid) &
                                           VLAN_VID_MASK));
        }

        spin_unlock_bh(&vsi->mac_filter_hash_lock);
        if (vlan_id || qos)
                ret = i40e_vsi_add_pvid(vsi, vlanprio);
        else
                i40e_vsi_remove_pvid(vsi);
        spin_lock_bh(&vsi->mac_filter_hash_lock);

        if (vlan_id) {
                dev_info(&pf->pdev->dev, "Setting VLAN %d, QOS 0x%x on VF %d\n",
                         vlan_id, qos, vf_id);

                /* add new VLAN filter for each MAC */
                ret = i40e_add_vlan_all_mac(vsi, vlan_id);
                if (ret) {
                        dev_info(&vsi->back->pdev->dev,
                                 "add VF VLAN failed, ret=%d aq_err=%d\n", ret,
                                 vsi->back->hw.aq.asq_last_status);
                        spin_unlock_bh(&vsi->mac_filter_hash_lock);
                        goto error_pvid;
                }

                /* remove the previously added non-VLAN MAC filters */
                i40e_rm_vlan_all_mac(vsi, I40E_VLAN_ANY);
        }

        spin_unlock_bh(&vsi->mac_filter_hash_lock);

        /* Schedule the worker thread to take care of applying changes */
        i40e_service_event_schedule(vsi->back);

        if (ret) {
                dev_err(&pf->pdev->dev, "Unable to update VF vsi context\n");
                goto error_pvid;
        }

        /* The Port VLAN needs to be saved across resets the same as the
         * default LAN MAC address.
         */
        vf->port_vlan_id = le16_to_cpu(vsi->info.pvid);
        ret = 0;

error_pvid:
        return ret;
}

#define I40E_BW_CREDIT_DIVISOR 50     /* 50Mbps per BW credit */
#define I40E_MAX_BW_INACTIVE_ACCUM 4  /* device can accumulate 4 credits max */
/**
 * i40e_ndo_set_vf_bw
 * @netdev: network interface device structure
 * @vf_id: VF identifier
 * @tx_rate: Tx rate
 *
 * configure VF Tx rate
 **/
int i40e_ndo_set_vf_bw(struct net_device *netdev, int vf_id, int min_tx_rate,