// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019, Intel Corporation. */

#include <net/xdp_sock_drv.h>
#include <linux/net/intel/libie/rx.h>
#include "ice_base.h"
#include "ice_lib.h"
#include "ice_dcb_lib.h"
#include "ice_sriov.h"

/**
 * __ice_vsi_get_qs_contig - Assign a contiguous chunk of queues to VSI
 * @qs_cfg: gathered variables needed for PF->VSI queues assignment
 *
 * Return 0 on success and -ENOMEM in case of no left space in PF queue bitmap
 */
static int __ice_vsi_get_qs_contig(struct ice_qs_cfg *qs_cfg)
{
        unsigned int offset, i;

        mutex_lock(qs_cfg->qs_mutex);
        offset = bitmap_find_next_zero_area(qs_cfg->pf_map, qs_cfg->pf_map_size,
                                            0, qs_cfg->q_count, 0);
        if (offset >= qs_cfg->pf_map_size) {
                mutex_unlock(qs_cfg->qs_mutex);
                return -ENOMEM;
        }

        bitmap_set(qs_cfg->pf_map, offset, qs_cfg->q_count);
        for (i = 0; i < qs_cfg->q_count; i++)
                qs_cfg->vsi_map[i + qs_cfg->vsi_map_offset] = (u16)(i + offset);
        mutex_unlock(qs_cfg->qs_mutex);

        return 0;
}

/**
 * __ice_vsi_get_qs_sc - Assign a scattered queues from PF to VSI
 * @qs_cfg: gathered variables needed for pf->vsi queues assignment
 *
 * Return 0 on success and -ENOMEM in case of no left space in PF queue bitmap
 */
static int __ice_vsi_get_qs_sc(struct ice_qs_cfg *qs_cfg)
{
        unsigned int i, index = 0;

        mutex_lock(qs_cfg->qs_mutex);
        for (i = 0; i < qs_cfg->q_count; i++) {
                index = find_next_zero_bit(qs_cfg->pf_map,
                                           qs_cfg->pf_map_size, index);
                if (index >= qs_cfg->pf_map_size)
                        goto err_scatter;
                set_bit(index, qs_cfg->pf_map);
                qs_cfg->vsi_map[i + qs_cfg->vsi_map_offset] = (u16)index;
        }
        mutex_unlock(qs_cfg->qs_mutex);

        return 0;
err_scatter:
        for (index = 0; index < i; index++) {
                clear_bit(qs_cfg->vsi_map[index], qs_cfg->pf_map);
                qs_cfg->vsi_map[index + qs_cfg->vsi_map_offset] = 0;
        }
        mutex_unlock(qs_cfg->qs_mutex);

        return -ENOMEM;
}

/**
 * ice_pf_rxq_wait - Wait for a PF's Rx queue to be enabled or disabled
 * @pf: the PF being configured
 * @pf_q: the PF queue
 * @ena: enable or disable state of the queue
 *
 * This routine will wait for the given Rx queue of the PF to reach the
 * enabled or disabled state.
 * Returns -ETIMEDOUT in case of failing to reach the requested state after
 * multiple retries; else will return 0 in case of success.
 */
static int ice_pf_rxq_wait(struct ice_pf *pf, int pf_q, bool ena)
{
        int i;

        for (i = 0; i < ICE_Q_WAIT_MAX_RETRY; i++) {
                if (ena == !!(rd32(&pf->hw, QRX_CTRL(pf_q)) &
                              QRX_CTRL_QENA_STAT_M))
                        return 0;

                usleep_range(20, 40);
        }

        return -ETIMEDOUT;
}

/**
 * ice_vsi_alloc_q_vector - Allocate memory for a single interrupt vector
 * @vsi: the VSI being configured
 * @v_idx: index of the vector in the VSI struct
 *
 * We allocate one q_vector and set default value for ITR setting associated
 * with this q_vector. If allocation fails we return -ENOMEM.
 */
static int ice_vsi_alloc_q_vector(struct ice_vsi *vsi, u16 v_idx)
{
        struct ice_pf *pf = vsi->back;
        struct ice_q_vector *q_vector;
        int err;

        /* allocate q_vector */
        q_vector = kzalloc_obj(*q_vector);
        if (!q_vector)
                return -ENOMEM;

        q_vector->vsi = vsi;
        q_vector->v_idx = v_idx;
        q_vector->tx.itr_setting = ICE_DFLT_TX_ITR;
        q_vector->rx.itr_setting = ICE_DFLT_RX_ITR;
        q_vector->tx.itr_mode = ITR_DYNAMIC;
        q_vector->rx.itr_mode = ITR_DYNAMIC;
        q_vector->tx.type = ICE_TX_CONTAINER;
        q_vector->rx.type = ICE_RX_CONTAINER;
        q_vector->irq.index = -ENOENT;

        if (vsi->type == ICE_VSI_VF) {
                ice_calc_vf_reg_idx(vsi->vf, q_vector);
                goto out;
        } else if (vsi->type == ICE_VSI_LB) {
                goto skip_alloc;
        } else if (vsi->type == ICE_VSI_CTRL && vsi->vf) {
                struct ice_vsi *ctrl_vsi = ice_get_vf_ctrl_vsi(pf, vsi);

                if (ctrl_vsi) {
                        if (unlikely(!ctrl_vsi->q_vectors)) {
                                err = -ENOENT;
                                goto err_free_q_vector;
                        }

                        q_vector->irq = ctrl_vsi->q_vectors[0]->irq;
                        goto skip_alloc;
                }
        }

        q_vector->irq = ice_alloc_irq(pf, vsi->irq_dyn_alloc);
        if (q_vector->irq.index < 0) {
                err = -ENOMEM;
                goto err_free_q_vector;
        }

skip_alloc:
        q_vector->reg_idx = q_vector->irq.index;
        q_vector->vf_reg_idx = q_vector->irq.index;

        /* This will not be called in the driver load path because the netdev
         * will not be created yet. All other cases with register the NAPI
         * handler here (i.e. resume, reset/rebuild, etc.)
         */
        if (vsi->netdev)
                netif_napi_add_config(vsi->netdev, &q_vector->napi,
                                      ice_napi_poll, v_idx);

out:
        /* tie q_vector and VSI together */
        vsi->q_vectors[v_idx] = q_vector;

        return 0;

err_free_q_vector:
        kfree(q_vector);

        return err;
}

/**
 * ice_free_q_vector - Free memory allocated for a specific interrupt vector
 * @vsi: VSI having the memory freed
 * @v_idx: index of the vector to be freed
 */
static void ice_free_q_vector(struct ice_vsi *vsi, int v_idx)
{
        struct ice_q_vector *q_vector;
        struct ice_pf *pf = vsi->back;
        struct ice_tx_ring *tx_ring;
        struct ice_rx_ring *rx_ring;
        struct device *dev;

        dev = ice_pf_to_dev(pf);
        if (!vsi->q_vectors[v_idx]) {
                dev_dbg(dev, "Queue vector at index %d not found\n", v_idx);
                return;
        }
        q_vector = vsi->q_vectors[v_idx];

        ice_for_each_tx_ring(tx_ring, vsi->q_vectors[v_idx]->tx)
                tx_ring->q_vector = NULL;

        ice_for_each_rx_ring(rx_ring, vsi->q_vectors[v_idx]->rx)
                rx_ring->q_vector = NULL;

        /* only VSI with an associated netdev is set up with NAPI */
        if (vsi->netdev)
                netif_napi_del(&q_vector->napi);

        /* release MSIX interrupt if q_vector had interrupt allocated */
        if (q_vector->irq.index < 0)
                goto free_q_vector;

        /* only free last VF ctrl vsi interrupt */
        if (vsi->type == ICE_VSI_CTRL && vsi->vf &&
            ice_get_vf_ctrl_vsi(pf, vsi))
                goto free_q_vector;

        ice_free_irq(pf, q_vector->irq);

free_q_vector:
        kfree(q_vector);
        vsi->q_vectors[v_idx] = NULL;
}

/**
 * ice_cfg_itr_gran - set the ITR granularity to 2 usecs if not already set
 * @hw: board specific structure
 */
static void ice_cfg_itr_gran(struct ice_hw *hw)
{
        u32 regval = rd32(hw, GLINT_CTL);

        /* no need to update global register if ITR gran is already set */
        if (!(regval & GLINT_CTL_DIS_AUTOMASK_M) &&
            (FIELD_GET(GLINT_CTL_ITR_GRAN_200_M, regval) == ICE_ITR_GRAN_US) &&
            (FIELD_GET(GLINT_CTL_ITR_GRAN_100_M, regval) == ICE_ITR_GRAN_US) &&
            (FIELD_GET(GLINT_CTL_ITR_GRAN_50_M, regval) == ICE_ITR_GRAN_US) &&
            (FIELD_GET(GLINT_CTL_ITR_GRAN_25_M, regval) == ICE_ITR_GRAN_US))
                return;

        regval = FIELD_PREP(GLINT_CTL_ITR_GRAN_200_M, ICE_ITR_GRAN_US) |
                 FIELD_PREP(GLINT_CTL_ITR_GRAN_100_M, ICE_ITR_GRAN_US) |
                 FIELD_PREP(GLINT_CTL_ITR_GRAN_50_M, ICE_ITR_GRAN_US) |
                 FIELD_PREP(GLINT_CTL_ITR_GRAN_25_M, ICE_ITR_GRAN_US);
        wr32(hw, GLINT_CTL, regval);
}

/**
 * ice_calc_txq_handle - calculate the queue handle
 * @vsi: VSI that ring belongs to
 * @ring: ring to get the absolute queue index
 * @tc: traffic class number
 */
static u16
ice_calc_txq_handle(const struct ice_vsi *vsi, struct ice_tx_ring *ring, u8 tc)
{
        WARN_ONCE(ice_ring_is_xdp(ring) && tc, "XDP ring can't belong to TC other than 0\n");

        if (ring->ch)
                return ring->q_index - ring->ch->base_q;

        /* Idea here for calculation is that we subtract the number of queue
         * count from TC that ring belongs to from its absolute queue index
         * and as a result we get the queue's index within TC.
         */
        return ring->q_index - vsi->tc_cfg.tc_info[tc].qoffset;
}

/**
 * ice_cfg_xps_tx_ring - Configure XPS for a Tx ring
 * @ring: The Tx ring to configure
 *
 * This enables/disables XPS for a given Tx descriptor ring
 * based on the TCs enabled for the VSI that ring belongs to.
 */
static void ice_cfg_xps_tx_ring(struct ice_tx_ring *ring)
{
        if (!ring->q_vector || !ring->netdev)
                return;

        /* We only initialize XPS once, so as not to overwrite user settings */
        if (test_and_set_bit(ICE_TX_XPS_INIT_DONE, ring->xps_state))
                return;

        netif_set_xps_queue(ring->netdev,
                            &ring->q_vector->napi.config->affinity_mask,
                            ring->q_index);
}

/**
 * ice_set_txq_ctx_vmvf - set queue context VM/VF type and number by VSI type
 * @ring: the Tx ring to configure
 * @vmvf_type: VM/VF type
 * @vmvf_num: VM/VF number
 *
 * Return: 0 on success and a negative value on error.
 */
static int
ice_set_txq_ctx_vmvf(struct ice_tx_ring *ring, u8 *vmvf_type, u16 *vmvf_num)
{
        struct ice_vsi *vsi = ring->vsi;
        struct ice_hw *hw;

        hw = &vsi->back->hw;

        /* queue belongs to a specific VSI type
         * VF / VM index should be programmed per vmvf_type setting:
         * for vmvf_type = VF, it is VF number between 0-256
         * for vmvf_type = VM, it is VM number between 0-767
         * for PF or EMP this field should be set to zero
         */
        switch (vsi->type) {
        case ICE_VSI_LB:
        case ICE_VSI_CTRL:
        case ICE_VSI_PF:
                if (ring->ch)
                        *vmvf_type = ICE_TLAN_CTX_VMVF_TYPE_VMQ;
                else
                        *vmvf_type = ICE_TLAN_CTX_VMVF_TYPE_PF;
                break;
        case ICE_VSI_VF:
                /* Firmware expects vmvf_num to be absolute VF ID */
                *vmvf_num = hw->func_caps.vf_base_id + vsi->vf->vf_id;
                *vmvf_type = ICE_TLAN_CTX_VMVF_TYPE_VF;
                break;
        case ICE_VSI_SF:
                *vmvf_type = ICE_TLAN_CTX_VMVF_TYPE_VMQ;
                break;
        default:
                dev_info(ice_pf_to_dev(vsi->back),
                         "Unable to set VMVF type for VSI type %d\n",
                         vsi->type);
                return -EINVAL;
        }
        return 0;
}

/**
 * ice_setup_tx_ctx - setup a struct ice_tlan_ctx instance
 * @ring: the Tx ring to configure
 * @tlan_ctx: pointer to the Tx LAN queue context structure to be initialized
 * @pf_q: queue index in the PF space
 *
 * Configure the Tx descriptor ring in TLAN context.
 *
 * Return: 0 on success and a negative value on error.
 */
static int
ice_setup_tx_ctx(struct ice_tx_ring *ring, struct ice_tlan_ctx *tlan_ctx, u16 pf_q)
{
        struct ice_vsi *vsi = ring->vsi;
        struct ice_hw *hw;
        int err;

        hw = &vsi->back->hw;
        tlan_ctx->base = ring->dma >> ICE_TLAN_CTX_BASE_S;
        tlan_ctx->port_num = vsi->port_info->lport;

        /* Transmit Queue Length */
        tlan_ctx->qlen = ring->count;

        ice_set_cgd_num(tlan_ctx, ring->dcb_tc);

        /* PF number */
        tlan_ctx->pf_num = hw->pf_id;

        err = ice_set_txq_ctx_vmvf(ring, &tlan_ctx->vmvf_type,
                                   &tlan_ctx->vmvf_num);
        if (err)
                return err;

        /* make sure the context is associated with the right VSI */
        if (ring->ch)
                tlan_ctx->src_vsi = ring->ch->vsi_num;
        else
                tlan_ctx->src_vsi = ice_get_hw_vsi_num(hw, vsi->idx);

        /* Restrict Tx timestamps to the PF VSI */
        switch (vsi->type) {
        case ICE_VSI_PF:
                tlan_ctx->tsyn_ena = 1;
                break;
        default:
                break;
        }

        tlan_ctx->quanta_prof_idx = ring->quanta_prof_id;

        tlan_ctx->tso_ena = ICE_TX_LEGACY;
        tlan_ctx->tso_qnum = pf_q;

        /* Legacy or Advanced Host Interface:
         * 0: Advanced Host Interface
         * 1: Legacy Host Interface
         */
        tlan_ctx->legacy_int = ICE_TX_LEGACY;

        return 0;
}

/**
 * ice_setup_txtime_ctx - setup a struct ice_txtime_ctx instance
 * @ring: the tstamp ring to configure
 * @txtime_ctx: pointer to the Tx time queue context structure to be initialized
 *
 * Return: 0 on success and a negative value on error.
 */
static int
ice_setup_txtime_ctx(const struct ice_tstamp_ring *ring,
                     struct ice_txtime_ctx *txtime_ctx)
{
        struct ice_tx_ring *tx_ring = ring->tx_ring;
        struct ice_vsi *vsi = tx_ring->vsi;
        struct ice_hw *hw = &vsi->back->hw;
        int err;

        txtime_ctx->base = ring->dma >> ICE_TXTIME_CTX_BASE_S;

        /* Tx time Queue Length */
        txtime_ctx->qlen = ring->count;
        txtime_ctx->txtime_ena_q = 1;

        /* PF number */
        txtime_ctx->pf_num = hw->pf_id;

        err = ice_set_txq_ctx_vmvf(tx_ring, &txtime_ctx->vmvf_type,
                                   &txtime_ctx->vmvf_num);
        if (err)
                return err;

        /* make sure the context is associated with the right VSI */
        if (tx_ring->ch)
                txtime_ctx->src_vsi = tx_ring->ch->vsi_num;
        else
                txtime_ctx->src_vsi = ice_get_hw_vsi_num(hw, vsi->idx);

        txtime_ctx->ts_res = ICE_TXTIME_CTX_RESOLUTION_128NS;
        txtime_ctx->drbell_mode_32 = ICE_TXTIME_CTX_DRBELL_MODE_32;
        txtime_ctx->ts_fetch_prof_id = ICE_TXTIME_CTX_FETCH_PROF_ID_0;

        return 0;
}

/**
 * ice_calc_ts_ring_count - calculate the number of Tx time stamp descriptors
 * @tx_ring: Tx ring to calculate the count for
 *
 * Return: the number of Tx time stamp descriptors.
 */
u16 ice_calc_ts_ring_count(struct ice_tx_ring *tx_ring)
{
        u16 prof = ICE_TXTIME_CTX_FETCH_PROF_ID_0;
        struct ice_vsi *vsi = tx_ring->vsi;
        struct ice_hw *hw = &vsi->back->hw;
        u16 max_fetch_desc = 0, fetch, i;
        u32 reg;

        for (i = 0; i < ICE_TXTIME_FETCH_PROFILE_CNT; i++) {
                reg = rd32(hw, E830_GLTXTIME_FETCH_PROFILE(prof, 0));
                fetch = FIELD_GET(E830_GLTXTIME_FETCH_PROFILE_FETCH_TS_DESC_M,
                                  reg);
                max_fetch_desc = max(fetch, max_fetch_desc);
        }

        if (!max_fetch_desc)
                max_fetch_desc = ICE_TXTIME_FETCH_TS_DESC_DFLT;

        max_fetch_desc = ALIGN(max_fetch_desc, ICE_REQ_DESC_MULTIPLE);

        return tx_ring->count + max_fetch_desc;
}

/**
 * ice_setup_rx_ctx - Configure a receive ring context
 * @ring: The Rx ring to configure
 *
 * Configure the Rx descriptor ring in RLAN context.
 */
static int ice_setup_rx_ctx(struct ice_rx_ring *ring)
{
        struct ice_vsi *vsi = ring->vsi;
        u32 rxdid = ICE_RXDID_FLEX_NIC;
        struct ice_rlan_ctx rlan_ctx;
        struct ice_hw *hw;
        u16 pf_q;
        int err;

        hw = &vsi->back->hw;

        /* what is Rx queue number in global space of 2K Rx queues */
        pf_q = vsi->rxq_map[ring->q_index];

        /* clear the context structure first */
        memset(&rlan_ctx, 0, sizeof(rlan_ctx));

        /* Receive Queue Base Address.
         * Indicates the starting address of the descriptor queue defined in
         * 128 Byte units.
         */
        rlan_ctx.base = ring->dma >> ICE_RLAN_BASE_S;

        rlan_ctx.qlen = ring->count;

        /* Receive Packet Data Buffer Size.
         * The Packet Data Buffer Size is defined in 128 byte units.
         */
        rlan_ctx.dbuf = DIV_ROUND_UP(ring->rx_buf_len,
                                     BIT_ULL(ICE_RLAN_CTX_DBUF_S));

        /* use 32 byte descriptors */
        rlan_ctx.dsize = 1;

        /* Strip the Ethernet CRC bytes before the packet is posted to host
         * memory.
         */
        rlan_ctx.crcstrip = !(ring->flags & ICE_RX_FLAGS_CRC_STRIP_DIS);

        /* L2TSEL flag defines the reported L2 Tags in the receive descriptor
         * and it needs to remain 1 for non-DVM capable configurations to not
         * break backward compatibility for VF drivers. Setting this field to 0
         * will cause the single/outer VLAN tag to be stripped to the L2TAG2_2ND
         * field in the Rx descriptor. Setting it to 1 allows the VLAN tag to
         * be stripped in L2TAG1 of the Rx descriptor, which is where VFs will
         * check for the tag
         */
        if (ice_is_dvm_ena(hw))
                if (vsi->type == ICE_VSI_VF &&
                    ice_vf_is_port_vlan_ena(vsi->vf))
                        rlan_ctx.l2tsel = 1;
                else
                        rlan_ctx.l2tsel = 0;
        else
                rlan_ctx.l2tsel = 1;

        if (ring->hdr_pp) {
                rlan_ctx.hbuf = ring->rx_hdr_len >> ICE_RLAN_CTX_HBUF_S;
                rlan_ctx.dtype = ICE_RX_DTYPE_HEADER_SPLIT;

                /*
                 * If the frame is TCP/UDP/SCTP, it will be split by the
                 * payload.
                 * If not, but it's an IPv4/IPv6 frame, it will be split by
                 * the IP header.
                 * If not IP, it will be split by the Ethernet header.
                 *
                 * In any case, the header buffer will never be left empty.
                 */
                rlan_ctx.hsplit_0 = ICE_RLAN_RX_HSPLIT_0_SPLIT_L2 |
                                    ICE_RLAN_RX_HSPLIT_0_SPLIT_IP |
                                    ICE_RLAN_RX_HSPLIT_0_SPLIT_TCP_UDP |
                                    ICE_RLAN_RX_HSPLIT_0_SPLIT_SCTP;
        } else {
                rlan_ctx.hbuf = 0;
                rlan_ctx.dtype = ICE_RX_DTYPE_NO_SPLIT;
                rlan_ctx.hsplit_0 = ICE_RLAN_RX_HSPLIT_0_NO_SPLIT;
        }

        rlan_ctx.hsplit_1 = ICE_RLAN_RX_HSPLIT_1_NO_SPLIT;

        /* This controls whether VLAN is stripped from inner headers
         * The VLAN in the inner L2 header is stripped to the receive
         * descriptor if enabled by this flag.
         */
        rlan_ctx.showiv = 0;

        /* Max packet size for this queue - must not be set to a larger value
         * than 5 x DBUF
         */
        rlan_ctx.rxmax = min_t(u32, vsi->max_frame,
                               ICE_MAX_CHAINED_RX_BUFS * ring->rx_buf_len);

        /* Rx queue threshold in units of 64 */
        rlan_ctx.lrxqthresh = 1;

        /* Enable descriptor prefetch */
        rlan_ctx.prefena = 1;

        /* PF acts as uplink for switchdev; set flex descriptor with src_vsi
         * metadata and flags to allow redirecting to PR netdev
         */
        if (ice_is_eswitch_mode_switchdev(vsi->back)) {
                ring->flags |= ICE_RX_FLAGS_MULTIDEV;
                rxdid = ICE_RXDID_FLEX_NIC_2;
        }

        /* Enable Flexible Descriptors in the queue context which
         * allows this driver to select a specific receive descriptor format
         * increasing context priority to pick up profile ID; default is 0x01;
         * setting to 0x03 to ensure profile is programming if prev context is
         * of same priority
         */
        if (vsi->type != ICE_VSI_VF)
                ice_write_qrxflxp_cntxt(hw, pf_q, rxdid, 0x3, true);

        /* Absolute queue number out of 2K needs to be passed */
        err = ice_write_rxq_ctx(hw, &rlan_ctx, pf_q);
        if (err) {
                dev_err(ice_pf_to_dev(vsi->back), "Failed to set LAN Rx queue context for absolute Rx queue %d error: %d\n",
                        pf_q, err);
                return -EIO;
        }

        if (vsi->type == ICE_VSI_VF)
                return 0;

        /* init queue specific tail register */
        ring->tail = hw->hw_addr + QRX_TAIL(pf_q);
        writel(0, ring->tail);

        return 0;
}

static int ice_rxq_pp_create(struct ice_rx_ring *rq)
{
        struct libeth_fq fq = {
                .count          = rq->count,
                .nid            = NUMA_NO_NODE,
                .hsplit         = rq->vsi->hsplit,
                .xdp            = ice_is_xdp_ena_vsi(rq->vsi),
                .buf_len        = LIBIE_MAX_RX_BUF_LEN,
        };
        int err;

        err = libeth_rx_fq_create(&fq, &rq->q_vector->napi);
        if (err)
                return err;

        rq->pp = fq.pp;
        rq->rx_fqes = fq.fqes;
        rq->truesize = fq.truesize;
        rq->rx_buf_len = fq.buf_len;

        if (!fq.hsplit)
                return 0;

        fq = (struct libeth_fq){
                .count          = rq->count,
                .type           = LIBETH_FQE_HDR,
                .nid            = NUMA_NO_NODE,
                .xdp            = ice_is_xdp_ena_vsi(rq->vsi),
        };

        err = libeth_rx_fq_create(&fq, &rq->q_vector->napi);
        if (err)
                goto destroy;

        rq->hdr_pp = fq.pp;
        rq->hdr_fqes = fq.fqes;
        rq->hdr_truesize = fq.truesize;
        rq->rx_hdr_len = fq.buf_len;

        return 0;

destroy:
        ice_rxq_pp_destroy(rq);

        return err;
}

/**
 * ice_vsi_cfg_rxq - Configure an Rx queue
 * @ring: the ring being configured
 *
 * Return 0 on success and a negative value on error.
 */
static int ice_vsi_cfg_rxq(struct ice_rx_ring *ring)
{
        struct device *dev = ice_pf_to_dev(ring->vsi->back);
        u32 num_bufs = ICE_DESC_UNUSED(ring);
        int err;

        if (ring->vsi->type == ICE_VSI_PF || ring->vsi->type == ICE_VSI_SF ||
            ring->vsi->type == ICE_VSI_LB) {
                ice_rx_xsk_pool(ring);
                err = ice_realloc_rx_xdp_bufs(ring, ring->xsk_pool);
                if (err)
                        return err;

                if (ring->xsk_pool) {
                        u32 frag_size =
                                xsk_pool_get_rx_frag_step(ring->xsk_pool);
                        err = __xdp_rxq_info_reg(&ring->xdp_rxq, ring->netdev,
                                                 ring->q_index,
                                                 ring->q_vector->napi.napi_id,
                                                 frag_size);
                        if (err)
                                return err;
                        err = xdp_rxq_info_reg_mem_model(&ring->xdp_rxq,
                                                         MEM_TYPE_XSK_BUFF_POOL,
                                                         NULL);
                        if (err)
                                return err;
                        xsk_pool_set_rxq_info(ring->xsk_pool, &ring->xdp_rxq);

                        dev_info(dev, "Registered XDP mem model MEM_TYPE_XSK_BUFF_POOL on Rx ring %d\n",
                                 ring->q_index);
                } else {
                        err = ice_rxq_pp_create(ring);
                        if (err)
                                return err;

                        err = __xdp_rxq_info_reg(&ring->xdp_rxq, ring->netdev,
                                                 ring->q_index,
                                                 ring->q_vector->napi.napi_id,
                                                 ring->truesize);
                        if (err)
                                goto err_destroy_fq;

                        xdp_rxq_info_attach_page_pool(&ring->xdp_rxq,
                                                      ring->pp);
                }
        }

        ring->xdp.data = NULL;
        err = ice_setup_rx_ctx(ring);
        if (err) {
                dev_err(dev, "ice_setup_rx_ctx failed for RxQ %d, err %d\n",
                        ring->q_index, err);
                goto err_destroy_fq;
        }

        if (ring->xsk_pool) {
                bool ok;

                if (!xsk_buff_can_alloc(ring->xsk_pool, num_bufs)) {
                        dev_warn(dev, "XSK buffer pool does not provide enough addresses to fill %d buffers on Rx ring %d\n",
                                 num_bufs, ring->q_index);
                        dev_warn(dev, "Change Rx ring/fill queue size to avoid performance issues\n");

                        return 0;
                }

                ok = ice_alloc_rx_bufs_zc(ring, ring->xsk_pool, num_bufs);
                if (!ok) {
                        u16 pf_q = ring->vsi->rxq_map[ring->q_index];

                        dev_info(dev, "Failed to allocate some buffers on XSK buffer pool enabled Rx ring %d (pf_q %d)\n",
                                 ring->q_index, pf_q);
                }

                return 0;
        }

        if (ring->vsi->type == ICE_VSI_CTRL)
                ice_init_ctrl_rx_descs(ring, num_bufs);
        else
                err = ice_alloc_rx_bufs(ring, num_bufs);

        if (err)
                goto err_destroy_fq;

        return 0;

err_destroy_fq:
        ice_rxq_pp_destroy(ring);

        return err;
}

int ice_vsi_cfg_single_rxq(struct ice_vsi *vsi, u16 q_idx)
{
        if (q_idx >= vsi->num_rxq)
                return -EINVAL;

        return ice_vsi_cfg_rxq(vsi->rx_rings[q_idx]);
}

/**
 * ice_vsi_cfg_frame_size - setup max frame size and Rx buffer length
 * @vsi: VSI
 * @ring: Rx ring to configure
 *
 * Determine the maximum frame size and Rx buffer length to use for a PF VSI.
 * Set these in the associated Rx ring structure.
 */
static void ice_vsi_cfg_frame_size(struct ice_vsi *vsi, struct ice_rx_ring *ring)
{
        if (!vsi->netdev) {
                vsi->max_frame = ICE_MAX_FRAME_LEGACY_RX;
        } else {
                vsi->max_frame = ICE_AQ_SET_MAC_FRAME_SIZE_MAX;
        }
}

/**
 * ice_vsi_cfg_rxqs - Configure the VSI for Rx
 * @vsi: the VSI being configured
 *
 * Return 0 on success and a negative value on error
 * Configure the Rx VSI for operation.
 */
int ice_vsi_cfg_rxqs(struct ice_vsi *vsi)
{
        u16 i;

        /* set up individual rings */
        ice_for_each_rxq(vsi, i) {
                struct ice_rx_ring *ring = vsi->rx_rings[i];
                int err;

                if (vsi->type != ICE_VSI_VF)
                        ice_vsi_cfg_frame_size(vsi, ring);

                err = ice_vsi_cfg_rxq(ring);
                if (err)
                        return err;
        }

        return 0;
}

/**
 * __ice_vsi_get_qs - helper function for assigning queues from PF to VSI
 * @qs_cfg: gathered variables needed for pf->vsi queues assignment
 *
 * This function first tries to find contiguous space. If it is not successful,
 * it tries with the scatter approach.
 *
 * Return 0 on success and -ENOMEM in case of no left space in PF queue bitmap
 */
int __ice_vsi_get_qs(struct ice_qs_cfg *qs_cfg)
{
        int ret = 0;

        ret = __ice_vsi_get_qs_contig(qs_cfg);
        if (ret) {
                /* contig failed, so try with scatter approach */
                qs_cfg->mapping_mode = ICE_VSI_MAP_SCATTER;
                qs_cfg->q_count = min_t(unsigned int, qs_cfg->q_count,
                                        qs_cfg->scatter_count);
                ret = __ice_vsi_get_qs_sc(qs_cfg);
        }
        return ret;
}

/**
 * ice_vsi_ctrl_one_rx_ring - start/stop VSI's Rx ring with no busy wait
 * @vsi: the VSI being configured
 * @ena: start or stop the Rx ring
 * @rxq_idx: 0-based Rx queue index for the VSI passed in
 * @wait: wait or don't wait for configuration to finish in hardware
 *
 * Return 0 on success and negative on error.
 */
int
ice_vsi_ctrl_one_rx_ring(struct ice_vsi *vsi, bool ena, u16 rxq_idx, bool wait)
{
        int pf_q = vsi->rxq_map[rxq_idx];
        struct ice_pf *pf = vsi->back;
        struct ice_hw *hw = &pf->hw;
        u32 rx_reg;

        rx_reg = rd32(hw, QRX_CTRL(pf_q));

        /* Skip if the queue is already in the requested state */
        if (ena == !!(rx_reg & QRX_CTRL_QENA_STAT_M))
                return 0;

        /* turn on/off the queue */
        if (ena)
                rx_reg |= QRX_CTRL_QENA_REQ_M;
        else
                rx_reg &= ~QRX_CTRL_QENA_REQ_M;
        wr32(hw, QRX_CTRL(pf_q), rx_reg);

        if (!wait)
                return 0;

        ice_flush(hw);
        return ice_pf_rxq_wait(pf, pf_q, ena);
}

/**
 * ice_vsi_wait_one_rx_ring - wait for a VSI's Rx ring to be stopped/started
 * @vsi: the VSI being configured
 * @ena: true/false to verify Rx ring has been enabled/disabled respectively
 * @rxq_idx: 0-based Rx queue index for the VSI passed in
 *
 * This routine will wait for the given Rx queue of the VSI to reach the
 * enabled or disabled state. Returns -ETIMEDOUT in case of failing to reach
 * the requested state after multiple retries; else will return 0 in case of
 * success.
 */
int ice_vsi_wait_one_rx_ring(struct ice_vsi *vsi, bool ena, u16 rxq_idx)
{
        int pf_q = vsi->rxq_map[rxq_idx];
        struct ice_pf *pf = vsi->back;

        return ice_pf_rxq_wait(pf, pf_q, ena);
}

/**
 * ice_vsi_alloc_q_vectors - Allocate memory for interrupt vectors
 * @vsi: the VSI being configured
 *
 * We allocate one q_vector per queue interrupt. If allocation fails we
 * return -ENOMEM.
 */
int ice_vsi_alloc_q_vectors(struct ice_vsi *vsi)
{
        struct device *dev = ice_pf_to_dev(vsi->back);
        u16 v_idx;
        int err;

        if (vsi->q_vectors[0]) {
                dev_dbg(dev, "VSI %d has existing q_vectors\n", vsi->vsi_num);
                return -EEXIST;
        }

        for (v_idx = 0; v_idx < vsi->num_q_vectors; v_idx++) {
                err = ice_vsi_alloc_q_vector(vsi, v_idx);
                if (err)
                        goto err_out;
        }

        return 0;

err_out:

        dev_info(dev, "Failed to allocate %d q_vectors for VSI %d, new value %d",
                 vsi->num_q_vectors, vsi->vsi_num, v_idx);
        vsi->num_q_vectors = v_idx;
        return v_idx ? 0 : err;
}

/**
 * ice_vsi_map_rings_to_vectors - Map VSI rings to interrupt vectors
 * @vsi: the VSI being configured
 *
 * This function maps descriptor rings to the queue-specific vectors allotted
 * through the MSI-X enabling code. On a constrained vector budget, we map Tx
 * and Rx rings to the vector as "efficiently" as possible.
 */
void ice_vsi_map_rings_to_vectors(struct ice_vsi *vsi)
{
        int q_vectors = vsi->num_q_vectors;
        u16 tx_rings_rem, rx_rings_rem;
        int v_id;

        /* initially assigning remaining rings count to VSIs num queue value */
        tx_rings_rem = vsi->num_txq;
        rx_rings_rem = vsi->num_rxq;

        for (v_id = 0; v_id < q_vectors; v_id++) {
                struct ice_q_vector *q_vector = vsi->q_vectors[v_id];
                u8 tx_rings_per_v, rx_rings_per_v;
                u16 q_id, q_base;

                /* Tx rings mapping to vector */
                tx_rings_per_v = (u8)DIV_ROUND_UP(tx_rings_rem,
                                                  q_vectors - v_id);
                q_vector->num_ring_tx = tx_rings_per_v;
                q_vector->tx.tx_ring = NULL;
                q_vector->tx.itr_idx = ICE_TX_ITR;
                q_base = vsi->num_txq - tx_rings_rem;

                for (q_id = q_base; q_id < (q_base + tx_rings_per_v); q_id++) {
                        struct ice_tx_ring *tx_ring = vsi->tx_rings[q_id];

                        tx_ring->q_vector = q_vector;
                        tx_ring->next = q_vector->tx.tx_ring;
                        q_vector->tx.tx_ring = tx_ring;
                }
                tx_rings_rem -= tx_rings_per_v;

                /* Rx rings mapping to vector */
                rx_rings_per_v = (u8)DIV_ROUND_UP(rx_rings_rem,
                                                  q_vectors - v_id);
                q_vector->num_ring_rx = rx_rings_per_v;
                q_vector->rx.rx_ring = NULL;
                q_vector->rx.itr_idx = ICE_RX_ITR;
                q_base = vsi->num_rxq - rx_rings_rem;

                for (q_id = q_base; q_id < (q_base + rx_rings_per_v); q_id++) {
                        struct ice_rx_ring *rx_ring = vsi->rx_rings[q_id];

                        rx_ring->q_vector = q_vector;
                        rx_ring->next = q_vector->rx.rx_ring;
                        q_vector->rx.rx_ring = rx_ring;
                }
                rx_rings_rem -= rx_rings_per_v;
        }

        if (ice_is_xdp_ena_vsi(vsi))
                ice_map_xdp_rings(vsi);
}

/**
 * ice_vsi_free_q_vectors - Free memory allocated for interrupt vectors
 * @vsi: the VSI having memory freed
 */
void ice_vsi_free_q_vectors(struct ice_vsi *vsi)
{
        int v_idx;

        ice_for_each_q_vector(vsi, v_idx)
                ice_free_q_vector(vsi, v_idx);

        vsi->num_q_vectors = 0;
}

/**
 * ice_cfg_tstamp - Configure Tx time stamp queue
 * @tx_ring: Tx ring to be configured with timestamping
 *
 * Return: 0 on success and a negative value on error.
 */
static int
ice_cfg_tstamp(struct ice_tx_ring *tx_ring)
{
        DEFINE_RAW_FLEX(struct ice_aqc_set_txtime_qgrp, txtime_qg_buf,
                        txtimeqs, 1);
        u8 txtime_buf_len = struct_size(txtime_qg_buf, txtimeqs, 1);
        struct ice_tstamp_ring *tstamp_ring = tx_ring->tstamp_ring;
        struct ice_txtime_ctx txtime_ctx = {};
        struct ice_vsi *vsi = tx_ring->vsi;
        struct ice_pf *pf = vsi->back;
        struct ice_hw *hw = &pf->hw;
        u16 pf_q = tx_ring->reg_idx;
        int err;

        err = ice_setup_txtime_ctx(tstamp_ring, &txtime_ctx);
        if (err) {
                dev_err(ice_pf_to_dev(pf), "Failed to setup Tx time queue context for queue %d, error: %d\n",
                        pf_q, err);
                return err;
        }
        ice_pack_txtime_ctx(&txtime_ctx,
                            &txtime_qg_buf->txtimeqs[0].txtime_ctx);

        tstamp_ring->tail = hw->hw_addr + E830_GLQTX_TXTIME_DBELL_LSB(pf_q);
        return ice_aq_set_txtimeq(hw, pf_q, 1, txtime_qg_buf,
                                  txtime_buf_len, NULL);
}

/**
 * ice_vsi_cfg_txq - Configure single Tx queue
 * @vsi: the VSI that queue belongs to
 * @ring: Tx ring to be configured
 * @qg_buf: queue group buffer
 *
 * Return: 0 on success and a negative value on error.
 */
static int
ice_vsi_cfg_txq(const struct ice_vsi *vsi, struct ice_tx_ring *ring,
                struct ice_aqc_add_tx_qgrp *qg_buf)
{
        u8 buf_len = struct_size(qg_buf, txqs, 1);
        struct ice_tlan_ctx tlan_ctx = { 0 };
        struct ice_aqc_add_txqs_perq *txq;
        struct ice_channel *ch = ring->ch;
        struct ice_pf *pf = vsi->back;
        struct ice_hw *hw = &pf->hw;
        u32 pf_q, vsi_idx;
        int status;
        u8 tc;

        /* Configure XPS */
        ice_cfg_xps_tx_ring(ring);

        pf_q = ring->reg_idx;
        status = ice_setup_tx_ctx(ring, &tlan_ctx, pf_q);
        if (status) {
                dev_err(ice_pf_to_dev(pf), "Failed to setup Tx context for queue %d, error: %d\n",
                        pf_q, status);
                return status;
        }
        /* copy context contents into the qg_buf */
        qg_buf->txqs[0].txq_id = cpu_to_le16(pf_q);
        ice_pack_txq_ctx(&tlan_ctx, &qg_buf->txqs[0].txq_ctx);

        /* init queue specific tail reg. It is referred as
         * transmit comm scheduler queue doorbell.
         */
        ring->tail = hw->hw_addr + QTX_COMM_DBELL(pf_q);

        if (IS_ENABLED(CONFIG_DCB))
                tc = ring->dcb_tc;
        else
                tc = 0;

        /* Add unique software queue handle of the Tx queue per
         * TC into the VSI Tx ring
         */
        ring->q_handle = ice_calc_txq_handle(vsi, ring, tc);

        if (ch) {
                tc = 0;
                vsi_idx = ch->ch_vsi->idx;
        } else {
                vsi_idx = vsi->idx;
        }

        status = ice_ena_vsi_txq(vsi->port_info, vsi_idx, tc, ring->q_handle,
                                 1, qg_buf, buf_len, NULL);
        if (status) {
                dev_err(ice_pf_to_dev(pf), "Failed to set LAN Tx queue context, error: %d\n",
                        status);
                return status;
        }

        /* Add Tx Queue TEID into the VSI Tx ring from the
         * response. This will complete configuring and
         * enabling the queue.
         */
        txq = &qg_buf->txqs[0];
        if (pf_q == le16_to_cpu(txq->txq_id))
                ring->txq_teid = le32_to_cpu(txq->q_teid);

        if (ice_is_txtime_ena(ring)) {
                status = ice_alloc_setup_tstamp_ring(ring);
                if (status) {
                        dev_err(ice_pf_to_dev(pf),
                                "Failed to allocate Tx timestamp ring, error: %d\n",
                                status);
                        goto err_setup_tstamp;
                }

                status = ice_cfg_tstamp(ring);
                if (status) {
                        dev_err(ice_pf_to_dev(pf), "Failed to set Tx Time queue context, error: %d\n",
                                status);
                        goto err_cfg_tstamp;
                }
        }
        return 0;

err_cfg_tstamp:
        ice_free_tx_tstamp_ring(ring);
err_setup_tstamp:
        ice_dis_vsi_txq(vsi->port_info, vsi_idx, tc, 1, &ring->q_handle,
                        &ring->reg_idx, &ring->txq_teid, ICE_NO_RESET,
                        tlan_ctx.vmvf_num, NULL);

        return status;
}

int ice_vsi_cfg_single_txq(struct ice_vsi *vsi, struct ice_tx_ring **tx_rings,
                           u16 q_idx)
{
        DEFINE_RAW_FLEX(struct ice_aqc_add_tx_qgrp, qg_buf, txqs, 1);

        if (q_idx >= vsi->alloc_txq || !tx_rings || !tx_rings[q_idx])
                return -EINVAL;

        qg_buf->num_txqs = 1;

        return ice_vsi_cfg_txq(vsi, tx_rings[q_idx], qg_buf);
}

/**
 * ice_vsi_cfg_txqs - Configure the VSI for Tx
 * @vsi: the VSI being configured
 * @rings: Tx ring array to be configured
 * @count: number of Tx ring array elements
 *
 * Return 0 on success and a negative value on error
 * Configure the Tx VSI for operation.
 */
static int
ice_vsi_cfg_txqs(struct ice_vsi *vsi, struct ice_tx_ring **rings, u16 count)
{
        DEFINE_RAW_FLEX(struct ice_aqc_add_tx_qgrp, qg_buf, txqs, 1);
        int err = 0;
        u16 q_idx;

        qg_buf->num_txqs = 1;

        for (q_idx = 0; q_idx < count; q_idx++) {
                err = ice_vsi_cfg_txq(vsi, rings[q_idx], qg_buf);
                if (err)
                        break;
        }

        return err;
}

/**
 * ice_vsi_cfg_lan_txqs - Configure the VSI for Tx
 * @vsi: the VSI being configured
 *
 * Return 0 on success and a negative value on error
 * Configure the Tx VSI for operation.
 */
int ice_vsi_cfg_lan_txqs(struct ice_vsi *vsi)
{
        return ice_vsi_cfg_txqs(vsi, vsi->tx_rings, vsi->num_txq);
}

/**
 * ice_vsi_cfg_xdp_txqs - Configure Tx queues dedicated for XDP in given VSI
 * @vsi: the VSI being configured
 *
 * Return 0 on success and a negative value on error
 * Configure the Tx queues dedicated for XDP in given VSI for operation.
 */
int ice_vsi_cfg_xdp_txqs(struct ice_vsi *vsi)
{
        int ret;
        int i;

        ret = ice_vsi_cfg_txqs(vsi, vsi->xdp_rings, vsi->num_xdp_txq);
        if (ret)
                return ret;

        ice_for_each_rxq(vsi, i)
                ice_tx_xsk_pool(vsi, i);

        return 0;
}

/**
 * ice_cfg_itr - configure the initial interrupt throttle values
 * @hw: pointer to the HW structure
 * @q_vector: interrupt vector that's being configured
 *
 * Configure interrupt throttling values for the ring containers that are
 * associated with the interrupt vector passed in.
 */
void ice_cfg_itr(struct ice_hw *hw, struct ice_q_vector *q_vector)
{
        ice_cfg_itr_gran(hw);

        if (q_vector->num_ring_rx)
                ice_write_itr(&q_vector->rx, q_vector->rx.itr_setting);

        if (q_vector->num_ring_tx)
                ice_write_itr(&q_vector->tx, q_vector->tx.itr_setting);

        ice_write_intrl(q_vector, q_vector->intrl);
}

/**
 * ice_cfg_txq_interrupt - configure interrupt on Tx queue
 * @vsi: the VSI being configured
 * @txq: Tx queue being mapped to MSI-X vector
 * @msix_idx: MSI-X vector index within the function
 * @itr_idx: ITR index of the interrupt cause
 *
 * Configure interrupt on Tx queue by associating Tx queue to MSI-X vector
 * within the function space.
 */
void
ice_cfg_txq_interrupt(struct ice_vsi *vsi, u16 txq, u16 msix_idx, u16 itr_idx)
{
        struct ice_pf *pf = vsi->back;
        struct ice_hw *hw = &pf->hw;
        u32 val;

        itr_idx = FIELD_PREP(QINT_TQCTL_ITR_INDX_M, itr_idx);

        val = QINT_TQCTL_CAUSE_ENA_M | itr_idx |
              FIELD_PREP(QINT_TQCTL_MSIX_INDX_M, msix_idx);

        wr32(hw, QINT_TQCTL(vsi->txq_map[txq]), val);
        if (ice_is_xdp_ena_vsi(vsi)) {
                u32 xdp_txq = txq + vsi->num_xdp_txq;

                wr32(hw, QINT_TQCTL(vsi->txq_map[xdp_txq]),
                     val);
        }
        ice_flush(hw);
}

/**
 * ice_cfg_rxq_interrupt - configure interrupt on Rx queue
 * @vsi: the VSI being configured
 * @rxq: Rx queue being mapped to MSI-X vector
 * @msix_idx: MSI-X vector index within the function
 * @itr_idx: ITR index of the interrupt cause
 *
 * Configure interrupt on Rx queue by associating Rx queue to MSI-X vector
 * within the function space.
 */
void
ice_cfg_rxq_interrupt(struct ice_vsi *vsi, u16 rxq, u16 msix_idx, u16 itr_idx)
{
        struct ice_pf *pf = vsi->back;
        struct ice_hw *hw = &pf->hw;
        u32 val;

        itr_idx = FIELD_PREP(QINT_RQCTL_ITR_INDX_M, itr_idx);

        val = QINT_RQCTL_CAUSE_ENA_M | itr_idx |
              FIELD_PREP(QINT_RQCTL_MSIX_INDX_M, msix_idx);

        wr32(hw, QINT_RQCTL(vsi->rxq_map[rxq]), val);

        ice_flush(hw);
}

/**
 * ice_trigger_sw_intr - trigger a software interrupt
 * @hw: pointer to the HW structure
 * @q_vector: interrupt vector to trigger the software interrupt for
 */
void ice_trigger_sw_intr(struct ice_hw *hw, const struct ice_q_vector *q_vector)
{
        wr32(hw, GLINT_DYN_CTL(q_vector->reg_idx),
             (ICE_ITR_NONE << GLINT_DYN_CTL_ITR_INDX_S) |
             GLINT_DYN_CTL_SWINT_TRIG_M |
             GLINT_DYN_CTL_INTENA_M);
}

/**
 * ice_vsi_stop_tx_ring - Disable single Tx ring
 * @vsi: the VSI being configured
 * @rst_src: reset source
 * @rel_vmvf_num: Relative ID of VF/VM
 * @ring: Tx ring to be stopped
 * @txq_meta: Meta data of Tx ring to be stopped
 */
int
ice_vsi_stop_tx_ring(struct ice_vsi *vsi, enum ice_disq_rst_src rst_src,
                     u16 rel_vmvf_num, struct ice_tx_ring *ring,
                     struct ice_txq_meta *txq_meta)
{
        struct ice_pf *pf = vsi->back;
        struct ice_q_vector *q_vector;
        struct ice_hw *hw = &pf->hw;
        int status;
        u32 val;

        /* clear cause_ena bit for disabled queues */
        val = rd32(hw, QINT_TQCTL(ring->reg_idx));
        val &= ~QINT_TQCTL_CAUSE_ENA_M;
        wr32(hw, QINT_TQCTL(ring->reg_idx), val);

        /* software is expected to wait for 100 ns */
        ndelay(100);

        /* trigger a software interrupt for the vector
         * associated to the queue to schedule NAPI handler
         */
        q_vector = ring->q_vector;
        if (q_vector && !(vsi->vf && ice_is_vf_disabled(vsi->vf)))
                ice_trigger_sw_intr(hw, q_vector);

        status = ice_dis_vsi_txq(vsi->port_info, txq_meta->vsi_idx,
                                 txq_meta->tc, 1, &txq_meta->q_handle,
                                 &txq_meta->q_id, &txq_meta->q_teid, rst_src,
                                 rel_vmvf_num, NULL);

        /* if the disable queue command was exercised during an
         * active reset flow, -EBUSY is returned.
         * This is not an error as the reset operation disables
         * queues at the hardware level anyway.
         */
        if (status == -EBUSY) {
                dev_dbg(ice_pf_to_dev(vsi->back), "Reset in progress. LAN Tx queues already disabled\n");
        } else if (status == -ENOENT) {
                dev_dbg(ice_pf_to_dev(vsi->back), "LAN Tx queues do not exist, nothing to disable\n");
        } else if (status) {
                dev_dbg(ice_pf_to_dev(vsi->back), "Failed to disable LAN Tx queues, error: %d\n",
                        status);
                return status;
        }

        return 0;
}

/**
 * ice_fill_txq_meta - Prepare the Tx queue's meta data
 * @vsi: VSI that ring belongs to
 * @ring: ring that txq_meta will be based on
 * @txq_meta: a helper struct that wraps Tx queue's information
 *
 * Set up a helper struct that will contain all the necessary fields that
 * are needed for stopping Tx queue
 */
void
ice_fill_txq_meta(const struct ice_vsi *vsi, struct ice_tx_ring *ring,
                  struct ice_txq_meta *txq_meta)
{
        struct ice_channel *ch = ring->ch;
        u8 tc;

        if (IS_ENABLED(CONFIG_DCB))
                tc = ring->dcb_tc;
        else
                tc = 0;

        txq_meta->q_id = ring->reg_idx;
        txq_meta->q_teid = ring->txq_teid;
        txq_meta->q_handle = ring->q_handle;
        if (ch) {
                txq_meta->vsi_idx = ch->ch_vsi->idx;
                txq_meta->tc = 0;
        } else {
                txq_meta->vsi_idx = vsi->idx;
                txq_meta->tc = tc;
        }
}

/**
 * ice_qp_reset_stats - Resets all stats for rings of given index
 * @vsi: VSI that contains rings of interest
 * @q_idx: ring index in array
 */
static void ice_qp_reset_stats(struct ice_vsi *vsi, u16 q_idx)
{
        struct ice_vsi_stats *vsi_stat;
        struct ice_pf *pf;

        pf = vsi->back;
        if (!pf->vsi_stats)
                return;

        vsi_stat = pf->vsi_stats[vsi->idx];
        if (!vsi_stat)
                return;

        memset(&vsi_stat->rx_ring_stats[q_idx]->stats, 0,
               sizeof(vsi_stat->rx_ring_stats[q_idx]->stats));
        memset(&vsi_stat->tx_ring_stats[q_idx]->stats, 0,
               sizeof(vsi_stat->tx_ring_stats[q_idx]->stats));
        if (vsi->xdp_rings)
                memset(&vsi->xdp_rings[q_idx]->ring_stats->stats, 0,
                       sizeof(vsi->xdp_rings[q_idx]->ring_stats->stats));
}

/**
 * ice_qp_clean_rings - Cleans all the rings of a given index
 * @vsi: VSI that contains rings of interest
 * @q_idx: ring index in array
 */
static void ice_qp_clean_rings(struct ice_vsi *vsi, u16 q_idx)
{
        ice_clean_tx_ring(vsi->tx_rings[q_idx]);
        if (vsi->xdp_rings)
                ice_clean_tx_ring(vsi->xdp_rings[q_idx]);
        ice_clean_rx_ring(vsi->rx_rings[q_idx]);
}

/**
 * ice_qp_dis - Disables a queue pair
 * @vsi: VSI of interest
 * @q_idx: ring index in array
 *
 * Returns 0 on success, negative on failure.
 */
int ice_qp_dis(struct ice_vsi *vsi, u16 q_idx)
{
        struct ice_txq_meta txq_meta = { };
        struct ice_q_vector *q_vector;
        struct ice_tx_ring *tx_ring;
        struct ice_rx_ring *rx_ring;
        int fail = 0;
        int err;

        if (q_idx >= vsi->num_rxq || q_idx >= vsi->num_txq)
                return -EINVAL;

        tx_ring = vsi->tx_rings[q_idx];
        rx_ring = vsi->rx_rings[q_idx];
        q_vector = rx_ring->q_vector;

        synchronize_net();
        netif_carrier_off(vsi->netdev);
        netif_tx_stop_queue(netdev_get_tx_queue(vsi->netdev, q_idx));

        ice_qvec_dis_irq(vsi, rx_ring, q_vector);
        ice_qvec_toggle_napi(vsi, q_vector, false);

        ice_fill_txq_meta(vsi, tx_ring, &txq_meta);
        err = ice_vsi_stop_tx_ring(vsi, ICE_NO_RESET, 0, tx_ring, &txq_meta);
        if (!fail)
                fail = err;
        if (vsi->xdp_rings) {
                struct ice_tx_ring *xdp_ring = vsi->xdp_rings[q_idx];

                memset(&txq_meta, 0, sizeof(txq_meta));
                ice_fill_txq_meta(vsi, xdp_ring, &txq_meta);
                err = ice_vsi_stop_tx_ring(vsi, ICE_NO_RESET, 0, xdp_ring,
                                           &txq_meta);
                if (!fail)
                        fail = err;
        }

        ice_vsi_ctrl_one_rx_ring(vsi, false, q_idx, false);
        ice_qp_clean_rings(vsi, q_idx);
        ice_qp_reset_stats(vsi, q_idx);

        return fail;
}

/**
 * ice_qp_ena - Enables a queue pair
 * @vsi: VSI of interest
 * @q_idx: ring index in array
 *
 * Returns 0 on success, negative on failure.
 */
int ice_qp_ena(struct ice_vsi *vsi, u16 q_idx)
{
        struct ice_q_vector *q_vector;
        int fail = 0;
        bool link_up;
        int err;

        err = ice_vsi_cfg_single_txq(vsi, vsi->tx_rings, q_idx);
        if (!fail)
                fail = err;

        if (ice_is_xdp_ena_vsi(vsi)) {
                struct ice_tx_ring *xdp_ring = vsi->xdp_rings[q_idx];

                err = ice_vsi_cfg_single_txq(vsi, vsi->xdp_rings, q_idx);
                if (!fail)
                        fail = err;
                ice_set_ring_xdp(xdp_ring);
                ice_tx_xsk_pool(vsi, q_idx);
        }

        err = ice_vsi_cfg_single_rxq(vsi, q_idx);
        if (!fail)
                fail = err;

        q_vector = vsi->rx_rings[q_idx]->q_vector;
        ice_qvec_cfg_msix(vsi, q_vector, q_idx);

        err = ice_vsi_ctrl_one_rx_ring(vsi, true, q_idx, true);
        if (!fail)
                fail = err;

        ice_qvec_toggle_napi(vsi, q_vector, true);
        ice_qvec_ena_irq(vsi, q_vector);

        /* make sure NAPI sees updated ice_{t,x}_ring::xsk_pool */
        synchronize_net();
        ice_get_link_status(vsi->port_info, &link_up);
        if (link_up) {
                netif_tx_start_queue(netdev_get_tx_queue(vsi->netdev, q_idx));
                netif_carrier_on(vsi->netdev);
        }

        return fail;
}