ice: remove unnecessary &array[0] and just use array

[platform/kernel/linux-starfive.git] / drivers / net / ethernet / intel / ice / ice_sriov.c

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

#include "ice.h"
#include "ice_vf_lib_private.h"
#include "ice_base.h"
#include "ice_lib.h"
#include "ice_fltr.h"
#include "ice_dcb_lib.h"
#include "ice_flow.h"
#include "ice_eswitch.h"
#include "ice_virtchnl_allowlist.h"
#include "ice_flex_pipe.h"
#include "ice_vf_vsi_vlan_ops.h"
#include "ice_vlan.h"

/**
 * ice_free_vf_entries - Free all VF entries from the hash table
 * @pf: pointer to the PF structure
 *
 * Iterate over the VF hash table, removing and releasing all VF entries.
 * Called during VF teardown or as cleanup during failed VF initialization.
 */
static void ice_free_vf_entries(struct ice_pf *pf)
{
        struct ice_vfs *vfs = &pf->vfs;
        struct hlist_node *tmp;
        struct ice_vf *vf;
        unsigned int bkt;

        /* Remove all VFs from the hash table and release their main
         * reference. Once all references to the VF are dropped, ice_put_vf()
         * will call ice_release_vf which will remove the VF memory.
         */
        lockdep_assert_held(&vfs->table_lock);

        hash_for_each_safe(vfs->table, bkt, tmp, vf, entry) {
                hash_del_rcu(&vf->entry);
                ice_put_vf(vf);
        }
}

/**
 * ice_free_vf_res - Free a VF's resources
 * @vf: pointer to the VF info
 */
static void ice_free_vf_res(struct ice_vf *vf)
{
        struct ice_pf *pf = vf->pf;
        int i, last_vector_idx;

        /* First, disable VF's configuration API to prevent OS from
         * accessing the VF's VSI after it's freed or invalidated.
         */
        clear_bit(ICE_VF_STATE_INIT, vf->vf_states);
        ice_vf_fdir_exit(vf);
        /* free VF control VSI */
        if (vf->ctrl_vsi_idx != ICE_NO_VSI)
                ice_vf_ctrl_vsi_release(vf);

        /* free VSI and disconnect it from the parent uplink */
        if (vf->lan_vsi_idx != ICE_NO_VSI) {
                ice_vf_vsi_release(vf);
                vf->num_mac = 0;
        }

        last_vector_idx = vf->first_vector_idx + pf->vfs.num_msix_per - 1;

        /* clear VF MDD event information */
        memset(&vf->mdd_tx_events, 0, sizeof(vf->mdd_tx_events));
        memset(&vf->mdd_rx_events, 0, sizeof(vf->mdd_rx_events));

        /* Disable interrupts so that VF starts in a known state */
        for (i = vf->first_vector_idx; i <= last_vector_idx; i++) {
                wr32(&pf->hw, GLINT_DYN_CTL(i), GLINT_DYN_CTL_CLEARPBA_M);
                ice_flush(&pf->hw);
        }
        /* reset some of the state variables keeping track of the resources */
        clear_bit(ICE_VF_STATE_MC_PROMISC, vf->vf_states);
        clear_bit(ICE_VF_STATE_UC_PROMISC, vf->vf_states);
}

/**
 * ice_dis_vf_mappings
 * @vf: pointer to the VF structure
 */
static void ice_dis_vf_mappings(struct ice_vf *vf)
{
        struct ice_pf *pf = vf->pf;
        struct ice_vsi *vsi;
        struct device *dev;
        int first, last, v;
        struct ice_hw *hw;

        hw = &pf->hw;
        vsi = ice_get_vf_vsi(vf);
        if (WARN_ON(!vsi))
                return;

        dev = ice_pf_to_dev(pf);
        wr32(hw, VPINT_ALLOC(vf->vf_id), 0);
        wr32(hw, VPINT_ALLOC_PCI(vf->vf_id), 0);

        first = vf->first_vector_idx;
        last = first + pf->vfs.num_msix_per - 1;
        for (v = first; v <= last; v++) {
                u32 reg;

                reg = (((1 << GLINT_VECT2FUNC_IS_PF_S) &
                        GLINT_VECT2FUNC_IS_PF_M) |
                       ((hw->pf_id << GLINT_VECT2FUNC_PF_NUM_S) &
                        GLINT_VECT2FUNC_PF_NUM_M));
                wr32(hw, GLINT_VECT2FUNC(v), reg);
        }

        if (vsi->tx_mapping_mode == ICE_VSI_MAP_CONTIG)
                wr32(hw, VPLAN_TX_QBASE(vf->vf_id), 0);
        else
                dev_err(dev, "Scattered mode for VF Tx queues is not yet implemented\n");

        if (vsi->rx_mapping_mode == ICE_VSI_MAP_CONTIG)
                wr32(hw, VPLAN_RX_QBASE(vf->vf_id), 0);
        else
                dev_err(dev, "Scattered mode for VF Rx queues is not yet implemented\n");
}

/**
 * ice_sriov_free_msix_res - Reset/free any used MSIX resources
 * @pf: pointer to the PF structure
 *
 * Since no MSIX entries are taken from the pf->irq_tracker then just clear
 * the pf->sriov_base_vector.
 *
 * Returns 0 on success, and -EINVAL on error.
 */
static int ice_sriov_free_msix_res(struct ice_pf *pf)
{
        struct ice_res_tracker *res;

        if (!pf)
                return -EINVAL;

        res = pf->irq_tracker;
        if (!res)
                return -EINVAL;

        /* give back irq_tracker resources used */
        WARN_ON(pf->sriov_base_vector < res->num_entries);

        pf->sriov_base_vector = 0;

        return 0;
}

/**
 * ice_free_vfs - Free all VFs
 * @pf: pointer to the PF structure
 */
void ice_free_vfs(struct ice_pf *pf)
{
        struct device *dev = ice_pf_to_dev(pf);
        struct ice_vfs *vfs = &pf->vfs;
        struct ice_hw *hw = &pf->hw;
        struct ice_vf *vf;
        unsigned int bkt;

        if (!ice_has_vfs(pf))
                return;

        while (test_and_set_bit(ICE_VF_DIS, pf->state))
                usleep_range(1000, 2000);

        /* 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(dev, "VFs are assigned - not disabling SR-IOV\n");

        mutex_lock(&vfs->table_lock);

        ice_eswitch_release(pf);

        ice_for_each_vf(pf, bkt, vf) {
                mutex_lock(&vf->cfg_lock);

                ice_dis_vf_qs(vf);

                if (test_bit(ICE_VF_STATE_INIT, vf->vf_states)) {
                        /* disable VF qp mappings and set VF disable state */
                        ice_dis_vf_mappings(vf);
                        set_bit(ICE_VF_STATE_DIS, vf->vf_states);
                        ice_free_vf_res(vf);
                }

                if (!pci_vfs_assigned(pf->pdev)) {
                        u32 reg_idx, bit_idx;

                        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, GLGEN_VFLRSTAT(reg_idx), BIT(bit_idx));
                }

                /* clear malicious info since the VF is getting released */
                list_del(&vf->mbx_info.list_entry);

                mutex_unlock(&vf->cfg_lock);
        }

        if (ice_sriov_free_msix_res(pf))
                dev_err(dev, "Failed to free MSIX resources used by SR-IOV\n");

        vfs->num_qps_per = 0;
        ice_free_vf_entries(pf);

        mutex_unlock(&vfs->table_lock);

        clear_bit(ICE_VF_DIS, pf->state);
        clear_bit(ICE_FLAG_SRIOV_ENA, pf->flags);
}

/**
 * ice_vf_vsi_setup - Set up a VF VSI
 * @vf: VF to setup VSI for
 *
 * Returns pointer to the successfully allocated VSI struct on success,
 * otherwise returns NULL on failure.
 */
static struct ice_vsi *ice_vf_vsi_setup(struct ice_vf *vf)
{
        struct ice_vsi_cfg_params params = {};
        struct ice_pf *pf = vf->pf;
        struct ice_vsi *vsi;

        params.type = ICE_VSI_VF;
        params.pi = ice_vf_get_port_info(vf);
        params.vf = vf;
        params.flags = ICE_VSI_FLAG_INIT;

        vsi = ice_vsi_setup(pf, &params);

        if (!vsi) {
                dev_err(ice_pf_to_dev(pf), "Failed to create VF VSI\n");
                ice_vf_invalidate_vsi(vf);
                return NULL;
        }

        vf->lan_vsi_idx = vsi->idx;
        vf->lan_vsi_num = vsi->vsi_num;

        return vsi;
}

/**
 * ice_calc_vf_first_vector_idx - Calculate MSIX vector index in the PF space
 * @pf: pointer to PF structure
 * @vf: pointer to VF that the first MSIX vector index is being calculated for
 *
 * This returns the first MSIX vector index in PF space that is used by this VF.
 * This index is used when accessing PF relative registers such as
 * GLINT_VECT2FUNC and GLINT_DYN_CTL.
 * This will always be the OICR index in the AVF driver so any functionality
 * using vf->first_vector_idx for queue configuration will have to increment by
 * 1 to avoid meddling with the OICR index.
 */
static int ice_calc_vf_first_vector_idx(struct ice_pf *pf, struct ice_vf *vf)
{
        return pf->sriov_base_vector + vf->vf_id * pf->vfs.num_msix_per;
}

/**
 * ice_ena_vf_msix_mappings - enable VF MSIX mappings in hardware
 * @vf: VF to enable MSIX mappings for
 *
 * Some of the registers need to be indexed/configured using hardware global
 * device values and other registers need 0-based values, which represent PF
 * based values.
 */
static void ice_ena_vf_msix_mappings(struct ice_vf *vf)
{
        int device_based_first_msix, device_based_last_msix;
        int pf_based_first_msix, pf_based_last_msix, v;
        struct ice_pf *pf = vf->pf;
        int device_based_vf_id;
        struct ice_hw *hw;
        u32 reg;

        hw = &pf->hw;
        pf_based_first_msix = vf->first_vector_idx;
        pf_based_last_msix = (pf_based_first_msix + pf->vfs.num_msix_per) - 1;

        device_based_first_msix = pf_based_first_msix +
                pf->hw.func_caps.common_cap.msix_vector_first_id;
        device_based_last_msix =
                (device_based_first_msix + pf->vfs.num_msix_per) - 1;
        device_based_vf_id = vf->vf_id + hw->func_caps.vf_base_id;

        reg = (((device_based_first_msix << VPINT_ALLOC_FIRST_S) &
                VPINT_ALLOC_FIRST_M) |
               ((device_based_last_msix << VPINT_ALLOC_LAST_S) &
                VPINT_ALLOC_LAST_M) | VPINT_ALLOC_VALID_M);
        wr32(hw, VPINT_ALLOC(vf->vf_id), reg);

        reg = (((device_based_first_msix << VPINT_ALLOC_PCI_FIRST_S)
                 & VPINT_ALLOC_PCI_FIRST_M) |
               ((device_based_last_msix << VPINT_ALLOC_PCI_LAST_S) &
                VPINT_ALLOC_PCI_LAST_M) | VPINT_ALLOC_PCI_VALID_M);
        wr32(hw, VPINT_ALLOC_PCI(vf->vf_id), reg);

        /* map the interrupts to its functions */
        for (v = pf_based_first_msix; v <= pf_based_last_msix; v++) {
                reg = (((device_based_vf_id << GLINT_VECT2FUNC_VF_NUM_S) &
                        GLINT_VECT2FUNC_VF_NUM_M) |
                       ((hw->pf_id << GLINT_VECT2FUNC_PF_NUM_S) &
                        GLINT_VECT2FUNC_PF_NUM_M));
                wr32(hw, GLINT_VECT2FUNC(v), reg);
        }

        /* Map mailbox interrupt to VF MSI-X vector 0 */
        wr32(hw, VPINT_MBX_CTL(device_based_vf_id), VPINT_MBX_CTL_CAUSE_ENA_M);
}

/**
 * ice_ena_vf_q_mappings - enable Rx/Tx queue mappings for a VF
 * @vf: VF to enable the mappings for
 * @max_txq: max Tx queues allowed on the VF's VSI
 * @max_rxq: max Rx queues allowed on the VF's VSI
 */
static void ice_ena_vf_q_mappings(struct ice_vf *vf, u16 max_txq, u16 max_rxq)
{
        struct device *dev = ice_pf_to_dev(vf->pf);
        struct ice_vsi *vsi = ice_get_vf_vsi(vf);
        struct ice_hw *hw = &vf->pf->hw;
        u32 reg;

        if (WARN_ON(!vsi))
                return;

        /* set regardless of mapping mode */
        wr32(hw, VPLAN_TXQ_MAPENA(vf->vf_id), VPLAN_TXQ_MAPENA_TX_ENA_M);

        /* VF Tx queues allocation */
        if (vsi->tx_mapping_mode == ICE_VSI_MAP_CONTIG) {
                /* set the VF PF Tx queue range
                 * VFNUMQ value should be set to (number of queues - 1). A value
                 * of 0 means 1 queue and a value of 255 means 256 queues
                 */
                reg = (((vsi->txq_map[0] << VPLAN_TX_QBASE_VFFIRSTQ_S) &
                        VPLAN_TX_QBASE_VFFIRSTQ_M) |
                       (((max_txq - 1) << VPLAN_TX_QBASE_VFNUMQ_S) &
                        VPLAN_TX_QBASE_VFNUMQ_M));
                wr32(hw, VPLAN_TX_QBASE(vf->vf_id), reg);
        } else {
                dev_err(dev, "Scattered mode for VF Tx queues is not yet implemented\n");
        }

        /* set regardless of mapping mode */
        wr32(hw, VPLAN_RXQ_MAPENA(vf->vf_id), VPLAN_RXQ_MAPENA_RX_ENA_M);

        /* VF Rx queues allocation */
        if (vsi->rx_mapping_mode == ICE_VSI_MAP_CONTIG) {
                /* set the VF PF Rx queue range
                 * VFNUMQ value should be set to (number of queues - 1). A value
                 * of 0 means 1 queue and a value of 255 means 256 queues
                 */
                reg = (((vsi->rxq_map[0] << VPLAN_RX_QBASE_VFFIRSTQ_S) &
                        VPLAN_RX_QBASE_VFFIRSTQ_M) |
                       (((max_rxq - 1) << VPLAN_RX_QBASE_VFNUMQ_S) &
                        VPLAN_RX_QBASE_VFNUMQ_M));
                wr32(hw, VPLAN_RX_QBASE(vf->vf_id), reg);
        } else {
                dev_err(dev, "Scattered mode for VF Rx queues is not yet implemented\n");
        }
}

/**
 * ice_ena_vf_mappings - enable VF MSIX and queue mapping
 * @vf: pointer to the VF structure
 */
static void ice_ena_vf_mappings(struct ice_vf *vf)
{
        struct ice_vsi *vsi = ice_get_vf_vsi(vf);

        if (WARN_ON(!vsi))
                return;

        ice_ena_vf_msix_mappings(vf);
        ice_ena_vf_q_mappings(vf, vsi->alloc_txq, vsi->alloc_rxq);
}

/**
 * ice_calc_vf_reg_idx - Calculate the VF's register index in the PF space
 * @vf: VF to calculate the register index for
 * @q_vector: a q_vector associated to the VF
 */
int ice_calc_vf_reg_idx(struct ice_vf *vf, struct ice_q_vector *q_vector)
{
        struct ice_pf *pf;

        if (!vf || !q_vector)
                return -EINVAL;

        pf = vf->pf;

        /* always add one to account for the OICR being the first MSIX */
        return pf->sriov_base_vector + pf->vfs.num_msix_per * vf->vf_id +
                q_vector->v_idx + 1;
}

/**
 * ice_get_max_valid_res_idx - Get the max valid resource index
 * @res: pointer to the resource to find the max valid index for
 *
 * Start from the end of the ice_res_tracker and return right when we find the
 * first res->list entry with the ICE_RES_VALID_BIT set. This function is only
 * valid for SR-IOV because it is the only consumer that manipulates the
 * res->end and this is always called when res->end is set to res->num_entries.
 */
static int ice_get_max_valid_res_idx(struct ice_res_tracker *res)
{
        int i;

        if (!res)
                return -EINVAL;

        for (i = res->num_entries - 1; i >= 0; i--)
                if (res->list[i] & ICE_RES_VALID_BIT)
                        return i;

        return 0;
}

/**
 * ice_sriov_set_msix_res - Set any used MSIX resources
 * @pf: pointer to PF structure
 * @num_msix_needed: number of MSIX vectors needed for all SR-IOV VFs
 *
 * This function allows SR-IOV resources to be taken from the end of the PF's
 * allowed HW MSIX vectors so that the irq_tracker will not be affected. We
 * just set the pf->sriov_base_vector and return success.
 *
 * If there are not enough resources available, return an error. This should
 * always be caught by ice_set_per_vf_res().
 *
 * Return 0 on success, and -EINVAL when there are not enough MSIX vectors
 * in the PF's space available for SR-IOV.
 */
static int ice_sriov_set_msix_res(struct ice_pf *pf, u16 num_msix_needed)
{
        u16 total_vectors = pf->hw.func_caps.common_cap.num_msix_vectors;
        int vectors_used = pf->irq_tracker->num_entries;
        int sriov_base_vector;

        sriov_base_vector = total_vectors - num_msix_needed;

        /* make sure we only grab irq_tracker entries from the list end and
         * that we have enough available MSIX vectors
         */
        if (sriov_base_vector < vectors_used)
                return -EINVAL;

        pf->sriov_base_vector = sriov_base_vector;

        return 0;
}

/**
 * ice_set_per_vf_res - check if vectors and queues are available
 * @pf: pointer to the PF structure
 * @num_vfs: the number of SR-IOV VFs being configured
 *
 * First, determine HW interrupts from common pool. If we allocate fewer VFs, we
 * get more vectors and can enable more queues per VF. Note that this does not
 * grab any vectors from the SW pool already allocated. Also note, that all
 * vector counts include one for each VF's miscellaneous interrupt vector
 * (i.e. OICR).
 *
 * Minimum VFs - 2 vectors, 1 queue pair
 * Small VFs - 5 vectors, 4 queue pairs
 * Medium VFs - 17 vectors, 16 queue pairs
 *
 * Second, determine number of queue pairs per VF by starting with a pre-defined
 * maximum each VF supports. If this is not possible, then we adjust based on
 * queue pairs available on the device.
 *
 * Lastly, set queue and MSI-X VF variables tracked by the PF so it can be used
 * by each VF during VF initialization and reset.
 */
static int ice_set_per_vf_res(struct ice_pf *pf, u16 num_vfs)
{
        int max_valid_res_idx = ice_get_max_valid_res_idx(pf->irq_tracker);
        u16 num_msix_per_vf, num_txq, num_rxq, avail_qs;
        int msix_avail_per_vf, msix_avail_for_sriov;
        struct device *dev = ice_pf_to_dev(pf);
        int err;

        lockdep_assert_held(&pf->vfs.table_lock);

        if (!num_vfs)
                return -EINVAL;

        if (max_valid_res_idx < 0)
                return -ENOSPC;

        /* determine MSI-X resources per VF */
        msix_avail_for_sriov = pf->hw.func_caps.common_cap.num_msix_vectors -
                pf->irq_tracker->num_entries;
        msix_avail_per_vf = msix_avail_for_sriov / num_vfs;
        if (msix_avail_per_vf >= ICE_NUM_VF_MSIX_MED) {
                num_msix_per_vf = ICE_NUM_VF_MSIX_MED;
        } else if (msix_avail_per_vf >= ICE_NUM_VF_MSIX_SMALL) {
                num_msix_per_vf = ICE_NUM_VF_MSIX_SMALL;
        } else if (msix_avail_per_vf >= ICE_NUM_VF_MSIX_MULTIQ_MIN) {
                num_msix_per_vf = ICE_NUM_VF_MSIX_MULTIQ_MIN;
        } else if (msix_avail_per_vf >= ICE_MIN_INTR_PER_VF) {
                num_msix_per_vf = ICE_MIN_INTR_PER_VF;
        } else {
                dev_err(dev, "Only %d MSI-X interrupts available for SR-IOV. Not enough to support minimum of %d MSI-X interrupts per VF for %d VFs\n",
                        msix_avail_for_sriov, ICE_MIN_INTR_PER_VF,
                        num_vfs);
                return -ENOSPC;
        }

        num_txq = min_t(u16, num_msix_per_vf - ICE_NONQ_VECS_VF,
                        ICE_MAX_RSS_QS_PER_VF);
        avail_qs = ice_get_avail_txq_count(pf) / num_vfs;
        if (!avail_qs)
                num_txq = 0;
        else if (num_txq > avail_qs)
                num_txq = rounddown_pow_of_two(avail_qs);

        num_rxq = min_t(u16, num_msix_per_vf - ICE_NONQ_VECS_VF,
                        ICE_MAX_RSS_QS_PER_VF);
        avail_qs = ice_get_avail_rxq_count(pf) / num_vfs;
        if (!avail_qs)
                num_rxq = 0;
        else if (num_rxq > avail_qs)
                num_rxq = rounddown_pow_of_two(avail_qs);

        if (num_txq < ICE_MIN_QS_PER_VF || num_rxq < ICE_MIN_QS_PER_VF) {
                dev_err(dev, "Not enough queues to support minimum of %d queue pairs per VF for %d VFs\n",
                        ICE_MIN_QS_PER_VF, num_vfs);
                return -ENOSPC;
        }

        err = ice_sriov_set_msix_res(pf, num_msix_per_vf * num_vfs);
        if (err) {
                dev_err(dev, "Unable to set MSI-X resources for %d VFs, err %d\n",
                        num_vfs, err);
                return err;
        }

        /* only allow equal Tx/Rx queue count (i.e. queue pairs) */
        pf->vfs.num_qps_per = min_t(int, num_txq, num_rxq);
        pf->vfs.num_msix_per = num_msix_per_vf;
        dev_info(dev, "Enabling %d VFs with %d vectors and %d queues per VF\n",
                 num_vfs, pf->vfs.num_msix_per, pf->vfs.num_qps_per);

        return 0;
}

/**
 * ice_init_vf_vsi_res - initialize/setup VF VSI resources
 * @vf: VF to initialize/setup the VSI for
 *
 * This function creates a VSI for the VF, adds a VLAN 0 filter, and sets up the
 * VF VSI's broadcast filter and is only used during initial VF creation.
 */
static int ice_init_vf_vsi_res(struct ice_vf *vf)
{
        struct ice_pf *pf = vf->pf;
        struct ice_vsi *vsi;
        int err;

        vf->first_vector_idx = ice_calc_vf_first_vector_idx(pf, vf);

        vsi = ice_vf_vsi_setup(vf);
        if (!vsi)
                return -ENOMEM;

        err = ice_vf_init_host_cfg(vf, vsi);
        if (err)
                goto release_vsi;

        return 0;

release_vsi:
        ice_vf_vsi_release(vf);
        return err;
}

/**
 * ice_start_vfs - start VFs so they are ready to be used by SR-IOV
 * @pf: PF the VFs are associated with
 */
static int ice_start_vfs(struct ice_pf *pf)
{
        struct ice_hw *hw = &pf->hw;
        unsigned int bkt, it_cnt;
        struct ice_vf *vf;
        int retval;

        lockdep_assert_held(&pf->vfs.table_lock);

        it_cnt = 0;
        ice_for_each_vf(pf, bkt, vf) {
                vf->vf_ops->clear_reset_trigger(vf);

                retval = ice_init_vf_vsi_res(vf);
                if (retval) {
                        dev_err(ice_pf_to_dev(pf), "Failed to initialize VSI resources for VF %d, error %d\n",
                                vf->vf_id, retval);
                        goto teardown;
                }

                set_bit(ICE_VF_STATE_INIT, vf->vf_states);
                ice_ena_vf_mappings(vf);
                wr32(hw, VFGEN_RSTAT(vf->vf_id), VIRTCHNL_VFR_VFACTIVE);
                it_cnt++;
        }

        ice_flush(hw);
        return 0;

teardown:
        ice_for_each_vf(pf, bkt, vf) {
                if (it_cnt == 0)
                        break;

                ice_dis_vf_mappings(vf);
                ice_vf_vsi_release(vf);
                it_cnt--;
        }

        return retval;
}

/**
 * ice_sriov_free_vf - Free VF memory after all references are dropped
 * @vf: pointer to VF to free
 *
 * Called by ice_put_vf through ice_release_vf once the last reference to a VF
 * structure has been dropped.
 */
static void ice_sriov_free_vf(struct ice_vf *vf)
{
        mutex_destroy(&vf->cfg_lock);

        kfree_rcu(vf, rcu);
}

/**
 * ice_sriov_clear_reset_state - clears VF Reset status register
 * @vf: the vf to configure
 */
static void ice_sriov_clear_reset_state(struct ice_vf *vf)
{
        struct ice_hw *hw = &vf->pf->hw;

        /* Clear the reset status register so that VF immediately sees that
         * the device is resetting, even if hardware hasn't yet gotten around
         * to clearing VFGEN_RSTAT for us.
         */
        wr32(hw, VFGEN_RSTAT(vf->vf_id), VIRTCHNL_VFR_INPROGRESS);
}

/**
 * ice_sriov_clear_mbx_register - clears SRIOV VF's mailbox registers
 * @vf: the vf to configure
 */
static void ice_sriov_clear_mbx_register(struct ice_vf *vf)
{
        struct ice_pf *pf = vf->pf;

        wr32(&pf->hw, VF_MBX_ARQLEN(vf->vf_id), 0);
        wr32(&pf->hw, VF_MBX_ATQLEN(vf->vf_id), 0);
}

/**
 * ice_sriov_trigger_reset_register - trigger VF reset for SRIOV VF
 * @vf: pointer to VF structure
 * @is_vflr: true if reset occurred due to VFLR
 *
 * Trigger and cleanup after a VF reset for a SR-IOV VF.
 */
static void ice_sriov_trigger_reset_register(struct ice_vf *vf, bool is_vflr)
{
        struct ice_pf *pf = vf->pf;
        u32 reg, reg_idx, bit_idx;
        unsigned int vf_abs_id, i;
        struct device *dev;
        struct ice_hw *hw;

        dev = ice_pf_to_dev(pf);
        hw = &pf->hw;
        vf_abs_id = vf->vf_id + hw->func_caps.vf_base_id;

        /* In the case of a VFLR, HW has already reset the VF and we just need
         * to clean up. Otherwise we must first trigger the reset using the
         * VFRTRIG register.
         */
        if (!is_vflr) {
                reg = rd32(hw, VPGEN_VFRTRIG(vf->vf_id));
                reg |= VPGEN_VFRTRIG_VFSWR_M;
                wr32(hw, VPGEN_VFRTRIG(vf->vf_id), reg);
        }

        /* clear the VFLR bit in GLGEN_VFLRSTAT */
        reg_idx = (vf_abs_id) / 32;
        bit_idx = (vf_abs_id) % 32;
        wr32(hw, GLGEN_VFLRSTAT(reg_idx), BIT(bit_idx));
        ice_flush(hw);

        wr32(hw, PF_PCI_CIAA,
             VF_DEVICE_STATUS | (vf_abs_id << PF_PCI_CIAA_VF_NUM_S));
        for (i = 0; i < ICE_PCI_CIAD_WAIT_COUNT; i++) {
                reg = rd32(hw, PF_PCI_CIAD);
                /* no transactions pending so stop polling */
                if ((reg & VF_TRANS_PENDING_M) == 0)
                        break;

                dev_err(dev, "VF %u PCI transactions stuck\n", vf->vf_id);
                udelay(ICE_PCI_CIAD_WAIT_DELAY_US);
        }
}

/**
 * ice_sriov_poll_reset_status - poll SRIOV VF reset status
 * @vf: pointer to VF structure
 *
 * Returns true when reset is successful, else returns false
 */
static bool ice_sriov_poll_reset_status(struct ice_vf *vf)
{
        struct ice_pf *pf = vf->pf;
        unsigned int i;
        u32 reg;

        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.
                 */
                reg = rd32(&pf->hw, VPGEN_VFRSTAT(vf->vf_id));
                if (reg & VPGEN_VFRSTAT_VFRD_M)
                        return true;

                /* only sleep if the reset is not done */
                usleep_range(10, 20);
        }
        return false;
}

/**
 * ice_sriov_clear_reset_trigger - enable VF to access hardware
 * @vf: VF to enabled hardware access for
 */
static void ice_sriov_clear_reset_trigger(struct ice_vf *vf)
{
        struct ice_hw *hw = &vf->pf->hw;
        u32 reg;

        reg = rd32(hw, VPGEN_VFRTRIG(vf->vf_id));
        reg &= ~VPGEN_VFRTRIG_VFSWR_M;
        wr32(hw, VPGEN_VFRTRIG(vf->vf_id), reg);
        ice_flush(hw);
}

/**
 * ice_sriov_create_vsi - Create a new VSI for a VF
 * @vf: VF to create the VSI for
 *
 * This is called by ice_vf_recreate_vsi to create the new VSI after the old
 * VSI has been released.
 */
static int ice_sriov_create_vsi(struct ice_vf *vf)
{
        struct ice_vsi *vsi;

        vsi = ice_vf_vsi_setup(vf);
        if (!vsi)
                return -ENOMEM;

        return 0;
}

/**
 * ice_sriov_post_vsi_rebuild - tasks to do after the VF's VSI have been rebuilt
 * @vf: VF to perform tasks on
 */
static void ice_sriov_post_vsi_rebuild(struct ice_vf *vf)
{
        ice_ena_vf_mappings(vf);
        wr32(&vf->pf->hw, VFGEN_RSTAT(vf->vf_id), VIRTCHNL_VFR_VFACTIVE);
}

static const struct ice_vf_ops ice_sriov_vf_ops = {
        .reset_type = ICE_VF_RESET,
        .free = ice_sriov_free_vf,
        .clear_reset_state = ice_sriov_clear_reset_state,
        .clear_mbx_register = ice_sriov_clear_mbx_register,
        .trigger_reset_register = ice_sriov_trigger_reset_register,
        .poll_reset_status = ice_sriov_poll_reset_status,
        .clear_reset_trigger = ice_sriov_clear_reset_trigger,
        .irq_close = NULL,
        .create_vsi = ice_sriov_create_vsi,
        .post_vsi_rebuild = ice_sriov_post_vsi_rebuild,
};

/**
 * ice_create_vf_entries - Allocate and insert VF entries
 * @pf: pointer to the PF structure
 * @num_vfs: the number of VFs to allocate
 *
 * Allocate new VF entries and insert them into the hash table. Set some
 * basic default fields for initializing the new VFs.
 *
 * After this function exits, the hash table will have num_vfs entries
 * inserted.
 *
 * Returns 0 on success or an integer error code on failure.
 */
static int ice_create_vf_entries(struct ice_pf *pf, u16 num_vfs)
{
        struct ice_vfs *vfs = &pf->vfs;
        struct ice_vf *vf;
        u16 vf_id;
        int err;

        lockdep_assert_held(&vfs->table_lock);

        for (vf_id = 0; vf_id < num_vfs; vf_id++) {
                vf = kzalloc(sizeof(*vf), GFP_KERNEL);
                if (!vf) {
                        err = -ENOMEM;
                        goto err_free_entries;
                }
                kref_init(&vf->refcnt);

                vf->pf = pf;
                vf->vf_id = vf_id;

                /* set sriov vf ops for VFs created during SRIOV flow */
                vf->vf_ops = &ice_sriov_vf_ops;

                ice_initialize_vf_entry(vf);

                vf->vf_sw_id = pf->first_sw;

                hash_add_rcu(vfs->table, &vf->entry, vf_id);
        }

        return 0;

err_free_entries:
        ice_free_vf_entries(pf);
        return err;
}

/**
 * ice_ena_vfs - enable VFs so they are ready to be used
 * @pf: pointer to the PF structure
 * @num_vfs: number of VFs to enable
 */
static int ice_ena_vfs(struct ice_pf *pf, u16 num_vfs)
{
        struct device *dev = ice_pf_to_dev(pf);
        struct ice_hw *hw = &pf->hw;
        int ret;

        /* Disable global interrupt 0 so we don't try to handle the VFLR. */
        wr32(hw, GLINT_DYN_CTL(pf->oicr_idx),
             ICE_ITR_NONE << GLINT_DYN_CTL_ITR_INDX_S);
        set_bit(ICE_OICR_INTR_DIS, pf->state);
        ice_flush(hw);

        ret = pci_enable_sriov(pf->pdev, num_vfs);
        if (ret)
                goto err_unroll_intr;

        mutex_lock(&pf->vfs.table_lock);

        ret = ice_set_per_vf_res(pf, num_vfs);
        if (ret) {
                dev_err(dev, "Not enough resources for %d VFs, err %d. Try with fewer number of VFs\n",
                        num_vfs, ret);
                goto err_unroll_sriov;
        }

        ret = ice_create_vf_entries(pf, num_vfs);
        if (ret) {
                dev_err(dev, "Failed to allocate VF entries for %d VFs\n",
                        num_vfs);
                goto err_unroll_sriov;
        }

        ret = ice_start_vfs(pf);
        if (ret) {
                dev_err(dev, "Failed to start %d VFs, err %d\n", num_vfs, ret);
                ret = -EAGAIN;
                goto err_unroll_vf_entries;
        }

        clear_bit(ICE_VF_DIS, pf->state);

        ret = ice_eswitch_configure(pf);
        if (ret) {
                dev_err(dev, "Failed to configure eswitch, err %d\n", ret);
                goto err_unroll_sriov;
        }

        /* rearm global interrupts */
        if (test_and_clear_bit(ICE_OICR_INTR_DIS, pf->state))
                ice_irq_dynamic_ena(hw, NULL, NULL);

        mutex_unlock(&pf->vfs.table_lock);

        return 0;

err_unroll_vf_entries:
        ice_free_vf_entries(pf);
err_unroll_sriov:
        mutex_unlock(&pf->vfs.table_lock);
        pci_disable_sriov(pf->pdev);
err_unroll_intr:
        /* rearm interrupts here */
        ice_irq_dynamic_ena(hw, NULL, NULL);
        clear_bit(ICE_OICR_INTR_DIS, pf->state);
        return ret;
}

/**
 * ice_pci_sriov_ena - Enable or change number of VFs
 * @pf: pointer to the PF structure
 * @num_vfs: number of VFs to allocate
 *
 * Returns 0 on success and negative on failure
 */
static int ice_pci_sriov_ena(struct ice_pf *pf, int num_vfs)
{
        int pre_existing_vfs = pci_num_vf(pf->pdev);
        struct device *dev = ice_pf_to_dev(pf);
        int err;

        if (pre_existing_vfs && pre_existing_vfs != num_vfs)
                ice_free_vfs(pf);
        else if (pre_existing_vfs && pre_existing_vfs == num_vfs)
                return 0;

        if (num_vfs > pf->vfs.num_supported) {
                dev_err(dev, "Can't enable %d VFs, max VFs supported is %d\n",
                        num_vfs, pf->vfs.num_supported);
                return -EOPNOTSUPP;
        }

        dev_info(dev, "Enabling %d VFs\n", num_vfs);
        err = ice_ena_vfs(pf, num_vfs);
        if (err) {
                dev_err(dev, "Failed to enable SR-IOV: %d\n", err);
                return err;
        }

        set_bit(ICE_FLAG_SRIOV_ENA, pf->flags);
        return 0;
}

/**
 * ice_check_sriov_allowed - check if SR-IOV is allowed based on various checks
 * @pf: PF to enabled SR-IOV on
 */
static int ice_check_sriov_allowed(struct ice_pf *pf)
{
        struct device *dev = ice_pf_to_dev(pf);

        if (!test_bit(ICE_FLAG_SRIOV_CAPABLE, pf->flags)) {
                dev_err(dev, "This device is not capable of SR-IOV\n");
                return -EOPNOTSUPP;
        }

        if (ice_is_safe_mode(pf)) {
                dev_err(dev, "SR-IOV cannot be configured - Device is in Safe Mode\n");
                return -EOPNOTSUPP;
        }

        if (!ice_pf_state_is_nominal(pf)) {
                dev_err(dev, "Cannot enable SR-IOV, device not ready\n");
                return -EBUSY;
        }

        return 0;
}

/**
 * ice_sriov_configure - Enable or change number of VFs via sysfs
 * @pdev: pointer to a pci_dev structure
 * @num_vfs: number of VFs to allocate or 0 to free VFs
 *
 * This function is called when the user updates the number of VFs in sysfs. On
 * success return whatever num_vfs was set to by the caller. Return negative on
 * failure.
 */
int ice_sriov_configure(struct pci_dev *pdev, int num_vfs)
{
        struct ice_pf *pf = pci_get_drvdata(pdev);
        struct device *dev = ice_pf_to_dev(pf);
        int err;

        err = ice_check_sriov_allowed(pf);
        if (err)
                return err;

        if (!num_vfs) {
                if (!pci_vfs_assigned(pdev)) {
                        ice_free_vfs(pf);
                        if (pf->lag)
                                ice_enable_lag(pf->lag);
                        return 0;
                }

                dev_err(dev, "can't free VFs because some are assigned to VMs.\n");
                return -EBUSY;
        }

        err = ice_pci_sriov_ena(pf, num_vfs);
        if (err)
                return err;

        if (pf->lag)
                ice_disable_lag(pf->lag);
        return num_vfs;
}

/**
 * ice_process_vflr_event - Free VF resources via IRQ calls
 * @pf: pointer to the PF structure
 *
 * called from the VFLR IRQ handler to
 * free up VF resources and state variables
 */
void ice_process_vflr_event(struct ice_pf *pf)
{
        struct ice_hw *hw = &pf->hw;
        struct ice_vf *vf;
        unsigned int bkt;
        u32 reg;

        if (!test_and_clear_bit(ICE_VFLR_EVENT_PENDING, pf->state) ||
            !ice_has_vfs(pf))
                return;

        mutex_lock(&pf->vfs.table_lock);
        ice_for_each_vf(pf, bkt, vf) {
                u32 reg_idx, bit_idx;

                reg_idx = (hw->func_caps.vf_base_id + vf->vf_id) / 32;
                bit_idx = (hw->func_caps.vf_base_id + vf->vf_id) % 32;
                /* read GLGEN_VFLRSTAT register to find out the flr VFs */
                reg = rd32(hw, GLGEN_VFLRSTAT(reg_idx));
                if (reg & BIT(bit_idx))
                        /* GLGEN_VFLRSTAT bit will be cleared in ice_reset_vf */
                        ice_reset_vf(vf, ICE_VF_RESET_VFLR | ICE_VF_RESET_LOCK);
        }
        mutex_unlock(&pf->vfs.table_lock);
}

/**
 * ice_get_vf_from_pfq - get the VF who owns the PF space queue passed in
 * @pf: PF used to index all VFs
 * @pfq: queue index relative to the PF's function space
 *
 * If no VF is found who owns the pfq then return NULL, otherwise return a
 * pointer to the VF who owns the pfq
 *
 * If this function returns non-NULL, it acquires a reference count of the VF
 * structure. The caller is responsible for calling ice_put_vf() to drop this
 * reference.
 */
static struct ice_vf *ice_get_vf_from_pfq(struct ice_pf *pf, u16 pfq)
{
        struct ice_vf *vf;
        unsigned int bkt;

        rcu_read_lock();
        ice_for_each_vf_rcu(pf, bkt, vf) {
                struct ice_vsi *vsi;
                u16 rxq_idx;

                vsi = ice_get_vf_vsi(vf);
                if (!vsi)
                        continue;

                ice_for_each_rxq(vsi, rxq_idx)
                        if (vsi->rxq_map[rxq_idx] == pfq) {
                                struct ice_vf *found;

                                if (kref_get_unless_zero(&vf->refcnt))
                                        found = vf;
                                else
                                        found = NULL;
                                rcu_read_unlock();
                                return found;
                        }
        }
        rcu_read_unlock();

        return NULL;
}

/**
 * ice_globalq_to_pfq - convert from global queue index to PF space queue index
 * @pf: PF used for conversion
 * @globalq: global queue index used to convert to PF space queue index
 */
static u32 ice_globalq_to_pfq(struct ice_pf *pf, u32 globalq)
{
        return globalq - pf->hw.func_caps.common_cap.rxq_first_id;
}

/**
 * ice_vf_lan_overflow_event - handle LAN overflow event for a VF
 * @pf: PF that the LAN overflow event happened on
 * @event: structure holding the event information for the LAN overflow event
 *
 * Determine if the LAN overflow event was caused by a VF queue. If it was not
 * caused by a VF, do nothing. If a VF caused this LAN overflow event trigger a
 * reset on the offending VF.
 */
void
ice_vf_lan_overflow_event(struct ice_pf *pf, struct ice_rq_event_info *event)
{
        u32 gldcb_rtctq, queue;
        struct ice_vf *vf;

        gldcb_rtctq = le32_to_cpu(event->desc.params.lan_overflow.prtdcb_ruptq);
        dev_dbg(ice_pf_to_dev(pf), "GLDCB_RTCTQ: 0x%08x\n", gldcb_rtctq);

        /* event returns device global Rx queue number */
        queue = (gldcb_rtctq & GLDCB_RTCTQ_RXQNUM_M) >>
                GLDCB_RTCTQ_RXQNUM_S;

        vf = ice_get_vf_from_pfq(pf, ice_globalq_to_pfq(pf, queue));
        if (!vf)
                return;

        ice_reset_vf(vf, ICE_VF_RESET_NOTIFY | ICE_VF_RESET_LOCK);
        ice_put_vf(vf);
}

/**
 * ice_set_vf_spoofchk
 * @netdev: network interface device structure
 * @vf_id: VF identifier
 * @ena: flag to enable or disable feature
 *
 * Enable or disable VF spoof checking
 */
int ice_set_vf_spoofchk(struct net_device *netdev, int vf_id, bool ena)
{
        struct ice_netdev_priv *np = netdev_priv(netdev);
        struct ice_pf *pf = np->vsi->back;
        struct ice_vsi *vf_vsi;
        struct device *dev;
        struct ice_vf *vf;
        int ret;

        dev = ice_pf_to_dev(pf);

        vf = ice_get_vf_by_id(pf, vf_id);
        if (!vf)
                return -EINVAL;

        ret = ice_check_vf_ready_for_cfg(vf);
        if (ret)
                goto out_put_vf;

        vf_vsi = ice_get_vf_vsi(vf);
        if (!vf_vsi) {
                netdev_err(netdev, "VSI %d for VF %d is null\n",
                           vf->lan_vsi_idx, vf->vf_id);
                ret = -EINVAL;
                goto out_put_vf;
        }

        if (vf_vsi->type != ICE_VSI_VF) {
                netdev_err(netdev, "Type %d of VSI %d for VF %d is no ICE_VSI_VF\n",
                           vf_vsi->type, vf_vsi->vsi_num, vf->vf_id);
                ret = -ENODEV;
                goto out_put_vf;
        }

        if (ena == vf->spoofchk) {
                dev_dbg(dev, "VF spoofchk already %s\n", ena ? "ON" : "OFF");
                ret = 0;
                goto out_put_vf;
        }

        ret = ice_vsi_apply_spoofchk(vf_vsi, ena);
        if (ret)
                dev_err(dev, "Failed to set spoofchk %s for VF %d VSI %d\n error %d\n",
                        ena ? "ON" : "OFF", vf->vf_id, vf_vsi->vsi_num, ret);
        else
                vf->spoofchk = ena;

out_put_vf:
        ice_put_vf(vf);
        return ret;
}

/**
 * ice_get_vf_cfg
 * @netdev: network interface device structure
 * @vf_id: VF identifier
 * @ivi: VF configuration structure
 *
 * return VF configuration
 */
int
ice_get_vf_cfg(struct net_device *netdev, int vf_id, struct ifla_vf_info *ivi)
{
        struct ice_pf *pf = ice_netdev_to_pf(netdev);
        struct ice_vf *vf;
        int ret;

        vf = ice_get_vf_by_id(pf, vf_id);
        if (!vf)
                return -EINVAL;

        ret = ice_check_vf_ready_for_cfg(vf);
        if (ret)
                goto out_put_vf;

        ivi->vf = vf_id;
        ether_addr_copy(ivi->mac, vf->hw_lan_addr);

        /* VF configuration for VLAN and applicable QoS */
        ivi->vlan = ice_vf_get_port_vlan_id(vf);
        ivi->qos = ice_vf_get_port_vlan_prio(vf);
        if (ice_vf_is_port_vlan_ena(vf))
                ivi->vlan_proto = cpu_to_be16(ice_vf_get_port_vlan_tpid(vf));

        ivi->trusted = vf->trusted;
        ivi->spoofchk = vf->spoofchk;
        if (!vf->link_forced)
                ivi->linkstate = IFLA_VF_LINK_STATE_AUTO;
        else if (vf->link_up)
                ivi->linkstate = IFLA_VF_LINK_STATE_ENABLE;
        else
                ivi->linkstate = IFLA_VF_LINK_STATE_DISABLE;
        ivi->max_tx_rate = vf->max_tx_rate;
        ivi->min_tx_rate = vf->min_tx_rate;

out_put_vf:
        ice_put_vf(vf);
        return ret;
}

/**
 * ice_set_vf_mac
 * @netdev: network interface device structure
 * @vf_id: VF identifier
 * @mac: MAC address
 *
 * program VF MAC address
 */
int ice_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac)
{
        struct ice_pf *pf = ice_netdev_to_pf(netdev);
        struct ice_vf *vf;
        int ret;

        if (is_multicast_ether_addr(mac)) {
                netdev_err(netdev, "%pM not a valid unicast address\n", mac);
                return -EINVAL;
        }

        vf = ice_get_vf_by_id(pf, vf_id);
        if (!vf)
                return -EINVAL;

        /* nothing left to do, unicast MAC already set */
        if (ether_addr_equal(vf->dev_lan_addr, mac) &&
            ether_addr_equal(vf->hw_lan_addr, mac)) {
                ret = 0;
                goto out_put_vf;
        }

        ret = ice_check_vf_ready_for_cfg(vf);
        if (ret)
                goto out_put_vf;

        mutex_lock(&vf->cfg_lock);

        /* VF is notified of its new MAC via the PF's response to the
         * VIRTCHNL_OP_GET_VF_RESOURCES message after the VF has been reset
         */
        ether_addr_copy(vf->dev_lan_addr, mac);
        ether_addr_copy(vf->hw_lan_addr, mac);
        if (is_zero_ether_addr(mac)) {
                /* VF will send VIRTCHNL_OP_ADD_ETH_ADDR message with its MAC */
                vf->pf_set_mac = false;
                netdev_info(netdev, "Removing MAC on VF %d. VF driver will be reinitialized\n",
                            vf->vf_id);
        } else {
                /* PF will add MAC rule for the VF */
                vf->pf_set_mac = true;
                netdev_info(netdev, "Setting MAC %pM on VF %d. VF driver will be reinitialized\n",
                            mac, vf_id);
        }

        ice_reset_vf(vf, ICE_VF_RESET_NOTIFY);
        mutex_unlock(&vf->cfg_lock);

out_put_vf:
        ice_put_vf(vf);
        return ret;
}

/**
 * ice_set_vf_trust
 * @netdev: network interface device structure
 * @vf_id: VF identifier
 * @trusted: Boolean value to enable/disable trusted VF
 *
 * Enable or disable a given VF as trusted
 */
int ice_set_vf_trust(struct net_device *netdev, int vf_id, bool trusted)
{
        struct ice_pf *pf = ice_netdev_to_pf(netdev);
        struct ice_vf *vf;
        int ret;

        if (ice_is_eswitch_mode_switchdev(pf)) {
                dev_info(ice_pf_to_dev(pf), "Trusted VF is forbidden in switchdev mode\n");
                return -EOPNOTSUPP;
        }

        vf = ice_get_vf_by_id(pf, vf_id);
        if (!vf)
                return -EINVAL;

        ret = ice_check_vf_ready_for_cfg(vf);
        if (ret)
                goto out_put_vf;

        /* Check if already trusted */
        if (trusted == vf->trusted) {
                ret = 0;
                goto out_put_vf;
        }

        mutex_lock(&vf->cfg_lock);

        vf->trusted = trusted;
        ice_reset_vf(vf, ICE_VF_RESET_NOTIFY);
        dev_info(ice_pf_to_dev(pf), "VF %u is now %strusted\n",
                 vf_id, trusted ? "" : "un");

        mutex_unlock(&vf->cfg_lock);

out_put_vf:
        ice_put_vf(vf);
        return ret;
}

/**
 * ice_set_vf_link_state
 * @netdev: network interface device structure
 * @vf_id: VF identifier
 * @link_state: required link state
 *
 * Set VF's link state, irrespective of physical link state status
 */
int ice_set_vf_link_state(struct net_device *netdev, int vf_id, int link_state)
{
        struct ice_pf *pf = ice_netdev_to_pf(netdev);
        struct ice_vf *vf;
        int ret;

        vf = ice_get_vf_by_id(pf, vf_id);
        if (!vf)
                return -EINVAL;

        ret = ice_check_vf_ready_for_cfg(vf);
        if (ret)
                goto out_put_vf;

        switch (link_state) {
        case IFLA_VF_LINK_STATE_AUTO:
                vf->link_forced = false;
                break;
        case IFLA_VF_LINK_STATE_ENABLE:
                vf->link_forced = true;
                vf->link_up = true;
                break;
        case IFLA_VF_LINK_STATE_DISABLE:
                vf->link_forced = true;
                vf->link_up = false;
                break;
        default:
                ret = -EINVAL;
                goto out_put_vf;
        }

        ice_vc_notify_vf_link_state(vf);

out_put_vf:
        ice_put_vf(vf);
        return ret;
}

/**
 * ice_calc_all_vfs_min_tx_rate - calculate cumulative min Tx rate on all VFs
 * @pf: PF associated with VFs
 */
static int ice_calc_all_vfs_min_tx_rate(struct ice_pf *pf)
{
        struct ice_vf *vf;
        unsigned int bkt;
        int rate = 0;

        rcu_read_lock();
        ice_for_each_vf_rcu(pf, bkt, vf)
                rate += vf->min_tx_rate;
        rcu_read_unlock();

        return rate;
}

/**
 * ice_min_tx_rate_oversubscribed - check if min Tx rate causes oversubscription
 * @vf: VF trying to configure min_tx_rate
 * @min_tx_rate: min Tx rate in Mbps
 *
 * Check if the min_tx_rate being passed in will cause oversubscription of total
 * min_tx_rate based on the current link speed and all other VFs configured
 * min_tx_rate
 *
 * Return true if the passed min_tx_rate would cause oversubscription, else
 * return false
 */
static bool
ice_min_tx_rate_oversubscribed(struct ice_vf *vf, int min_tx_rate)
{
        struct ice_vsi *vsi = ice_get_vf_vsi(vf);
        int all_vfs_min_tx_rate;
        int link_speed_mbps;

        if (WARN_ON(!vsi))
                return false;

        link_speed_mbps = ice_get_link_speed_mbps(vsi);
        all_vfs_min_tx_rate = ice_calc_all_vfs_min_tx_rate(vf->pf);

        /* this VF's previous rate is being overwritten */
        all_vfs_min_tx_rate -= vf->min_tx_rate;

        if (all_vfs_min_tx_rate + min_tx_rate > link_speed_mbps) {
                dev_err(ice_pf_to_dev(vf->pf), "min_tx_rate of %d Mbps on VF %u would cause oversubscription of %d Mbps based on the current link speed %d Mbps\n",
                        min_tx_rate, vf->vf_id,
                        all_vfs_min_tx_rate + min_tx_rate - link_speed_mbps,
                        link_speed_mbps);
                return true;
        }

        return false;
}

/**
 * ice_set_vf_bw - set min/max VF bandwidth
 * @netdev: network interface device structure
 * @vf_id: VF identifier
 * @min_tx_rate: Minimum Tx rate in Mbps
 * @max_tx_rate: Maximum Tx rate in Mbps
 */
int
ice_set_vf_bw(struct net_device *netdev, int vf_id, int min_tx_rate,
              int max_tx_rate)
{
        struct ice_pf *pf = ice_netdev_to_pf(netdev);
        struct ice_vsi *vsi;
        struct device *dev;
        struct ice_vf *vf;
        int ret;

        dev = ice_pf_to_dev(pf);

        vf = ice_get_vf_by_id(pf, vf_id);
        if (!vf)
                return -EINVAL;

        ret = ice_check_vf_ready_for_cfg(vf);
        if (ret)
                goto out_put_vf;

        vsi = ice_get_vf_vsi(vf);
        if (!vsi) {
                ret = -EINVAL;
                goto out_put_vf;
        }

        if (min_tx_rate && ice_is_dcb_active(pf)) {
                dev_err(dev, "DCB on PF is currently enabled. VF min Tx rate limiting not allowed on this PF.\n");
                ret = -EOPNOTSUPP;
                goto out_put_vf;
        }

        if (ice_min_tx_rate_oversubscribed(vf, min_tx_rate)) {
                ret = -EINVAL;
                goto out_put_vf;
        }

        if (vf->min_tx_rate != (unsigned int)min_tx_rate) {
                ret = ice_set_min_bw_limit(vsi, (u64)min_tx_rate * 1000);
                if (ret) {
                        dev_err(dev, "Unable to set min-tx-rate for VF %d\n",
                                vf->vf_id);
                        goto out_put_vf;
                }

                vf->min_tx_rate = min_tx_rate;
        }

        if (vf->max_tx_rate != (unsigned int)max_tx_rate) {
                ret = ice_set_max_bw_limit(vsi, (u64)max_tx_rate * 1000);
                if (ret) {
                        dev_err(dev, "Unable to set max-tx-rate for VF %d\n",
                                vf->vf_id);
                        goto out_put_vf;
                }

                vf->max_tx_rate = max_tx_rate;
        }

out_put_vf:
        ice_put_vf(vf);
        return ret;
}

/**
 * ice_get_vf_stats - populate some stats for the VF
 * @netdev: the netdev of the PF
 * @vf_id: the host OS identifier (0-255)
 * @vf_stats: pointer to the OS memory to be initialized
 */
int ice_get_vf_stats(struct net_device *netdev, int vf_id,
                     struct ifla_vf_stats *vf_stats)
{
        struct ice_pf *pf = ice_netdev_to_pf(netdev);
        struct ice_eth_stats *stats;
        struct ice_vsi *vsi;
        struct ice_vf *vf;
        int ret;

        vf = ice_get_vf_by_id(pf, vf_id);
        if (!vf)
                return -EINVAL;

        ret = ice_check_vf_ready_for_cfg(vf);
        if (ret)
                goto out_put_vf;

        vsi = ice_get_vf_vsi(vf);
        if (!vsi) {
                ret = -EINVAL;
                goto out_put_vf;
        }

        ice_update_eth_stats(vsi);
        stats = &vsi->eth_stats;

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

        vf_stats->rx_packets = stats->rx_unicast + stats->rx_broadcast +
                stats->rx_multicast;
        vf_stats->tx_packets = stats->tx_unicast + stats->tx_broadcast +
                stats->tx_multicast;
        vf_stats->rx_bytes   = stats->rx_bytes;
        vf_stats->tx_bytes   = stats->tx_bytes;
        vf_stats->broadcast  = stats->rx_broadcast;
        vf_stats->multicast  = stats->rx_multicast;
        vf_stats->rx_dropped = stats->rx_discards;
        vf_stats->tx_dropped = stats->tx_discards;

out_put_vf:
        ice_put_vf(vf);
        return ret;
}

/**
 * ice_is_supported_port_vlan_proto - make sure the vlan_proto is supported
 * @hw: hardware structure used to check the VLAN mode
 * @vlan_proto: VLAN TPID being checked
 *
 * If the device is configured in Double VLAN Mode (DVM), then both ETH_P_8021Q
 * and ETH_P_8021AD are supported. If the device is configured in Single VLAN
 * Mode (SVM), then only ETH_P_8021Q is supported.
 */
static bool
ice_is_supported_port_vlan_proto(struct ice_hw *hw, u16 vlan_proto)
{
        bool is_supported = false;

        switch (vlan_proto) {
        case ETH_P_8021Q:
                is_supported = true;
                break;
        case ETH_P_8021AD:
                if (ice_is_dvm_ena(hw))
                        is_supported = true;
                break;
        }

        return is_supported;
}

/**
 * ice_set_vf_port_vlan
 * @netdev: network interface device structure
 * @vf_id: VF identifier
 * @vlan_id: VLAN ID being set
 * @qos: priority setting
 * @vlan_proto: VLAN protocol
 *
 * program VF Port VLAN ID and/or QoS
 */
int
ice_set_vf_port_vlan(struct net_device *netdev, int vf_id, u16 vlan_id, u8 qos,
                     __be16 vlan_proto)
{
        struct ice_pf *pf = ice_netdev_to_pf(netdev);
        u16 local_vlan_proto = ntohs(vlan_proto);
        struct device *dev;
        struct ice_vf *vf;
        int ret;

        dev = ice_pf_to_dev(pf);

        if (vlan_id >= VLAN_N_VID || qos > 7) {
                dev_err(dev, "Invalid Port VLAN parameters for VF %d, ID %d, QoS %d\n",
                        vf_id, vlan_id, qos);
                return -EINVAL;
        }

        if (!ice_is_supported_port_vlan_proto(&pf->hw, local_vlan_proto)) {
                dev_err(dev, "VF VLAN protocol 0x%04x is not supported\n",
                        local_vlan_proto);
                return -EPROTONOSUPPORT;
        }

        vf = ice_get_vf_by_id(pf, vf_id);
        if (!vf)
                return -EINVAL;

        ret = ice_check_vf_ready_for_cfg(vf);
        if (ret)
                goto out_put_vf;

        if (ice_vf_get_port_vlan_prio(vf) == qos &&
            ice_vf_get_port_vlan_tpid(vf) == local_vlan_proto &&
            ice_vf_get_port_vlan_id(vf) == vlan_id) {
                /* duplicate request, so just return success */
                dev_dbg(dev, "Duplicate port VLAN %u, QoS %u, TPID 0x%04x request\n",
                        vlan_id, qos, local_vlan_proto);
                ret = 0;
                goto out_put_vf;
        }

        mutex_lock(&vf->cfg_lock);

        vf->port_vlan_info = ICE_VLAN(local_vlan_proto, vlan_id, qos);
        if (ice_vf_is_port_vlan_ena(vf))
                dev_info(dev, "Setting VLAN %u, QoS %u, TPID 0x%04x on VF %d\n",
                         vlan_id, qos, local_vlan_proto, vf_id);
        else
                dev_info(dev, "Clearing port VLAN on VF %d\n", vf_id);

        ice_reset_vf(vf, ICE_VF_RESET_NOTIFY);
        mutex_unlock(&vf->cfg_lock);

out_put_vf:
        ice_put_vf(vf);
        return ret;
}

/**
 * ice_print_vf_rx_mdd_event - print VF Rx malicious driver detect event
 * @vf: pointer to the VF structure
 */
void ice_print_vf_rx_mdd_event(struct ice_vf *vf)
{
        struct ice_pf *pf = vf->pf;
        struct device *dev;

        dev = ice_pf_to_dev(pf);

        dev_info(dev, "%d Rx Malicious Driver Detection events detected on PF %d VF %d MAC %pM. mdd-auto-reset-vfs=%s\n",
                 vf->mdd_rx_events.count, pf->hw.pf_id, vf->vf_id,
                 vf->dev_lan_addr,
                 test_bit(ICE_FLAG_MDD_AUTO_RESET_VF, pf->flags)
                          ? "on" : "off");
}

/**
 * ice_print_vfs_mdd_events - print VFs malicious driver detect event
 * @pf: pointer to the PF structure
 *
 * Called from ice_handle_mdd_event to rate limit and print VFs MDD events.
 */
void ice_print_vfs_mdd_events(struct ice_pf *pf)
{
        struct device *dev = ice_pf_to_dev(pf);
        struct ice_hw *hw = &pf->hw;
        struct ice_vf *vf;
        unsigned int bkt;

        /* check that there are pending MDD events to print */
        if (!test_and_clear_bit(ICE_MDD_VF_PRINT_PENDING, pf->state))
                return;

        /* VF MDD event logs are rate limited to one second intervals */
        if (time_is_after_jiffies(pf->vfs.last_printed_mdd_jiffies + HZ * 1))
                return;

        pf->vfs.last_printed_mdd_jiffies = jiffies;

        mutex_lock(&pf->vfs.table_lock);
        ice_for_each_vf(pf, bkt, vf) {
                /* only print Rx MDD event message if there are new events */
                if (vf->mdd_rx_events.count != vf->mdd_rx_events.last_printed) {
                        vf->mdd_rx_events.last_printed =
                                                        vf->mdd_rx_events.count;
                        ice_print_vf_rx_mdd_event(vf);
                }

                /* only print Tx MDD event message if there are new events */
                if (vf->mdd_tx_events.count != vf->mdd_tx_events.last_printed) {
                        vf->mdd_tx_events.last_printed =
                                                        vf->mdd_tx_events.count;

                        dev_info(dev, "%d Tx Malicious Driver Detection events detected on PF %d VF %d MAC %pM.\n",
                                 vf->mdd_tx_events.count, hw->pf_id, vf->vf_id,
                                 vf->dev_lan_addr);
                }
        }
        mutex_unlock(&pf->vfs.table_lock);
}

/**
 * ice_restore_all_vfs_msi_state - restore VF MSI state after PF FLR
 * @pdev: pointer to a pci_dev structure
 *
 * Called when recovering from a PF FLR to restore interrupt capability to
 * the VFs.
 */
void ice_restore_all_vfs_msi_state(struct pci_dev *pdev)
{
        u16 vf_id;
        int pos;

        if (!pci_num_vf(pdev))
                return;

        pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
        if (pos) {
                struct pci_dev *vfdev;

                pci_read_config_word(pdev, pos + PCI_SRIOV_VF_DID,
                                     &vf_id);
                vfdev = pci_get_device(pdev->vendor, vf_id, NULL);
                while (vfdev) {
                        if (vfdev->is_virtfn && vfdev->physfn == pdev)
                                pci_restore_msi_state(vfdev);
                        vfdev = pci_get_device(pdev->vendor, vf_id,
                                               vfdev);
                }
        }
}

/**
 * ice_is_malicious_vf - helper function to detect a malicious VF
 * @pf: ptr to struct ice_pf
 * @event: pointer to the AQ event
 * @num_msg_proc: the number of messages processed so far
 * @num_msg_pending: the number of messages peinding in admin queue
 */
bool
ice_is_malicious_vf(struct ice_pf *pf, struct ice_rq_event_info *event,
                    u16 num_msg_proc, u16 num_msg_pending)
{
        s16 vf_id = le16_to_cpu(event->desc.retval);
        struct device *dev = ice_pf_to_dev(pf);
        struct ice_mbx_data mbxdata;
        bool report_malvf = false;
        struct ice_vf *vf;
        int status;

        vf = ice_get_vf_by_id(pf, vf_id);
        if (!vf)
                return false;

        if (test_bit(ICE_VF_STATE_DIS, vf->vf_states))
                goto out_put_vf;

        mbxdata.num_msg_proc = num_msg_proc;
        mbxdata.num_pending_arq = num_msg_pending;
        mbxdata.max_num_msgs_mbx = pf->hw.mailboxq.num_rq_entries;
#define ICE_MBX_OVERFLOW_WATERMARK 64
        mbxdata.async_watermark_val = ICE_MBX_OVERFLOW_WATERMARK;

        /* check to see if we have a newly malicious VF */
        status = ice_mbx_vf_state_handler(&pf->hw, &mbxdata, &vf->mbx_info,
                                          &report_malvf);
        if (status)
                goto out_put_vf;

        if (report_malvf) {
                struct ice_vsi *pf_vsi = ice_get_main_vsi(pf);
                u8 zero_addr[ETH_ALEN] = {};

                dev_warn(dev, "VF MAC %pM on PF MAC %pM is generating asynchronous messages and may be overflowing the PF message queue. Please see the Adapter User Guide for more information\n",
                         vf->dev_lan_addr,
                         pf_vsi ? pf_vsi->netdev->dev_addr : zero_addr);
        }

out_put_vf:
        ice_put_vf(vf);

        return vf->mbx_info.malicious;
}