// SPDX-License-Identifier: GPL-2.0
/* Marvell RVU Admin Function driver
 *
 * Copyright (C) 2018 Marvell.
 *
 */

#include <linux/types.h>
#include <linux/module.h>
#include <linux/pci.h>

#include "rvu.h"
#include "cgx.h"
#include "lmac_common.h"
#include "rvu_reg.h"
#include "rvu_trace.h"

struct cgx_evq_entry {
        struct list_head evq_node;
        struct cgx_link_event link_event;
};

#define M(_name, _id, _fn_name, _req_type, _rsp_type)                   \
static struct _req_type __maybe_unused                                  \
*otx2_mbox_alloc_msg_ ## _fn_name(struct rvu *rvu, int devid)           \
{                                                                       \
        struct _req_type *req;                                          \
                                                                        \
        req = (struct _req_type *)otx2_mbox_alloc_msg_rsp(              \
                &rvu->afpf_wq_info.mbox_up, devid, sizeof(struct _req_type), \
                sizeof(struct _rsp_type));                              \
        if (!req)                                                       \
                return NULL;                                            \
        req->hdr.sig = OTX2_MBOX_REQ_SIG;                               \
        req->hdr.id = _id;                                              \
        trace_otx2_msg_alloc(rvu->pdev, _id, sizeof(*req));             \
        return req;                                                     \
}

MBOX_UP_CGX_MESSAGES
#undef M

bool is_mac_feature_supported(struct rvu *rvu, int pf, int feature)
{
        u8 cgx_id, lmac_id;
        void *cgxd;

        if (!is_pf_cgxmapped(rvu, pf))
                return 0;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
        cgxd = rvu_cgx_pdata(cgx_id, rvu);

        return  (cgx_features_get(cgxd) & feature);
}

/* Returns bitmap of mapped PFs */
static u16 cgxlmac_to_pfmap(struct rvu *rvu, u8 cgx_id, u8 lmac_id)
{
        return rvu->cgxlmac2pf_map[CGX_OFFSET(cgx_id) + lmac_id];
}

int cgxlmac_to_pf(struct rvu *rvu, int cgx_id, int lmac_id)
{
        unsigned long pfmap;

        pfmap = cgxlmac_to_pfmap(rvu, cgx_id, lmac_id);

        /* Assumes only one pf mapped to a cgx lmac port */
        if (!pfmap)
                return -ENODEV;
        else
                return find_first_bit(&pfmap, 16);
}

static u8 cgxlmac_id_to_bmap(u8 cgx_id, u8 lmac_id)
{
        return ((cgx_id & 0xF) << 4) | (lmac_id & 0xF);
}

void *rvu_cgx_pdata(u8 cgx_id, struct rvu *rvu)
{
        if (cgx_id >= rvu->cgx_cnt_max)
                return NULL;

        return rvu->cgx_idmap[cgx_id];
}

/* Return first enabled CGX instance if none are enabled then return NULL */
void *rvu_first_cgx_pdata(struct rvu *rvu)
{
        int first_enabled_cgx = 0;
        void *cgxd = NULL;

        for (; first_enabled_cgx < rvu->cgx_cnt_max; first_enabled_cgx++) {
                cgxd = rvu_cgx_pdata(first_enabled_cgx, rvu);
                if (cgxd)
                        break;
        }

        return cgxd;
}

/* Based on P2X connectivity find mapped NIX block for a PF */
static void rvu_map_cgx_nix_block(struct rvu *rvu, int pf,
                                  int cgx_id, int lmac_id)
{
        struct rvu_pfvf *pfvf = &rvu->pf[pf];
        u8 p2x;

        p2x = cgx_lmac_get_p2x(cgx_id, lmac_id);
        /* Firmware sets P2X_SELECT as either NIX0 or NIX1 */
        pfvf->nix_blkaddr = BLKADDR_NIX0;
        if (p2x == CMR_P2X_SEL_NIX1)
                pfvf->nix_blkaddr = BLKADDR_NIX1;
}

static int rvu_map_cgx_lmac_pf(struct rvu *rvu)
{
        struct npc_pkind *pkind = &rvu->hw->pkind;
        int cgx_cnt_max = rvu->cgx_cnt_max;
        int pf = PF_CGXMAP_BASE;
        unsigned long lmac_bmap;
        int size, free_pkind;
        int cgx, lmac, iter;
        int numvfs, hwvfs;

        if (!cgx_cnt_max)
                return 0;

        if (cgx_cnt_max > 0xF || MAX_LMAC_PER_CGX > 0xF)
                return -EINVAL;

        /* Alloc map table
         * An additional entry is required since PF id starts from 1 and
         * hence entry at offset 0 is invalid.
         */
        size = (cgx_cnt_max * MAX_LMAC_PER_CGX + 1) * sizeof(u8);
        rvu->pf2cgxlmac_map = devm_kmalloc(rvu->dev, size, GFP_KERNEL);
        if (!rvu->pf2cgxlmac_map)
                return -ENOMEM;

        /* Initialize all entries with an invalid cgx and lmac id */
        memset(rvu->pf2cgxlmac_map, 0xFF, size);

        /* Reverse map table */
        rvu->cgxlmac2pf_map = devm_kzalloc(rvu->dev,
                                  cgx_cnt_max * MAX_LMAC_PER_CGX * sizeof(u16),
                                  GFP_KERNEL);
        if (!rvu->cgxlmac2pf_map)
                return -ENOMEM;

        rvu->cgx_mapped_pfs = 0;
        for (cgx = 0; cgx < cgx_cnt_max; cgx++) {
                if (!rvu_cgx_pdata(cgx, rvu))
                        continue;
                lmac_bmap = cgx_get_lmac_bmap(rvu_cgx_pdata(cgx, rvu));
                for_each_set_bit(iter, &lmac_bmap, MAX_LMAC_PER_CGX) {
                        lmac = cgx_get_lmacid(rvu_cgx_pdata(cgx, rvu),
                                              iter);
                        rvu->pf2cgxlmac_map[pf] = cgxlmac_id_to_bmap(cgx, lmac);
                        rvu->cgxlmac2pf_map[CGX_OFFSET(cgx) + lmac] = 1 << pf;
                        free_pkind = rvu_alloc_rsrc(&pkind->rsrc);
                        pkind->pfchan_map[free_pkind] = ((pf) & 0x3F) << 16;
                        rvu_map_cgx_nix_block(rvu, pf, cgx, lmac);
                        rvu->cgx_mapped_pfs++;
                        rvu_get_pf_numvfs(rvu, pf, &numvfs, &hwvfs);
                        rvu->cgx_mapped_vfs += numvfs;
                        pf++;
                }
        }
        return 0;
}

static int rvu_cgx_send_link_info(int cgx_id, int lmac_id, struct rvu *rvu)
{
        struct cgx_evq_entry *qentry;
        unsigned long flags;
        int err;

        qentry = kmalloc(sizeof(*qentry), GFP_KERNEL);
        if (!qentry)
                return -ENOMEM;

        /* Lock the event queue before we read the local link status */
        spin_lock_irqsave(&rvu->cgx_evq_lock, flags);
        err = cgx_get_link_info(rvu_cgx_pdata(cgx_id, rvu), lmac_id,
                                &qentry->link_event.link_uinfo);
        qentry->link_event.cgx_id = cgx_id;
        qentry->link_event.lmac_id = lmac_id;
        if (err) {
                kfree(qentry);
                goto skip_add;
        }
        list_add_tail(&qentry->evq_node, &rvu->cgx_evq_head);
skip_add:
        spin_unlock_irqrestore(&rvu->cgx_evq_lock, flags);

        /* start worker to process the events */
        queue_work(rvu->cgx_evh_wq, &rvu->cgx_evh_work);

        return 0;
}

/* This is called from interrupt context and is expected to be atomic */
static int cgx_lmac_postevent(struct cgx_link_event *event, void *data)
{
        struct cgx_evq_entry *qentry;
        struct rvu *rvu = data;

        /* post event to the event queue */
        qentry = kmalloc(sizeof(*qentry), GFP_ATOMIC);
        if (!qentry)
                return -ENOMEM;
        qentry->link_event = *event;
        spin_lock(&rvu->cgx_evq_lock);
        list_add_tail(&qentry->evq_node, &rvu->cgx_evq_head);
        spin_unlock(&rvu->cgx_evq_lock);

        /* start worker to process the events */
        queue_work(rvu->cgx_evh_wq, &rvu->cgx_evh_work);

        return 0;
}

static void cgx_notify_pfs(struct cgx_link_event *event, struct rvu *rvu)
{
        struct cgx_link_user_info *linfo;
        struct cgx_link_info_msg *msg;
        unsigned long pfmap;
        int err, pfid;

        linfo = &event->link_uinfo;
        pfmap = cgxlmac_to_pfmap(rvu, event->cgx_id, event->lmac_id);

        do {
                pfid = find_first_bit(&pfmap, 16);
                clear_bit(pfid, &pfmap);

                /* check if notification is enabled */
                if (!test_bit(pfid, &rvu->pf_notify_bmap)) {
                        dev_info(rvu->dev, "cgx %d: lmac %d Link status %s\n",
                                 event->cgx_id, event->lmac_id,
                                 linfo->link_up ? "UP" : "DOWN");
                        continue;
                }

                /* Send mbox message to PF */
                msg = otx2_mbox_alloc_msg_cgx_link_event(rvu, pfid);
                if (!msg)
                        continue;
                msg->link_info = *linfo;
                otx2_mbox_msg_send(&rvu->afpf_wq_info.mbox_up, pfid);
                err = otx2_mbox_wait_for_rsp(&rvu->afpf_wq_info.mbox_up, pfid);
                if (err)
                        dev_warn(rvu->dev, "notification to pf %d failed\n",
                                 pfid);
        } while (pfmap);
}

static void cgx_evhandler_task(struct work_struct *work)
{
        struct rvu *rvu = container_of(work, struct rvu, cgx_evh_work);
        struct cgx_evq_entry *qentry;
        struct cgx_link_event *event;
        unsigned long flags;

        do {
                /* Dequeue an event */
                spin_lock_irqsave(&rvu->cgx_evq_lock, flags);
                qentry = list_first_entry_or_null(&rvu->cgx_evq_head,
                                                  struct cgx_evq_entry,
                                                  evq_node);
                if (qentry)
                        list_del(&qentry->evq_node);
                spin_unlock_irqrestore(&rvu->cgx_evq_lock, flags);
                if (!qentry)
                        break; /* nothing more to process */

                event = &qentry->link_event;

                /* process event */
                cgx_notify_pfs(event, rvu);
                kfree(qentry);
        } while (1);
}

static int cgx_lmac_event_handler_init(struct rvu *rvu)
{
        unsigned long lmac_bmap;
        struct cgx_event_cb cb;
        int cgx, lmac, err;
        void *cgxd;

        spin_lock_init(&rvu->cgx_evq_lock);
        INIT_LIST_HEAD(&rvu->cgx_evq_head);
        INIT_WORK(&rvu->cgx_evh_work, cgx_evhandler_task);
        rvu->cgx_evh_wq = alloc_workqueue("rvu_evh_wq", 0, 0);
        if (!rvu->cgx_evh_wq) {
                dev_err(rvu->dev, "alloc workqueue failed");
                return -ENOMEM;
        }

        cb.notify_link_chg = cgx_lmac_postevent; /* link change call back */
        cb.data = rvu;

        for (cgx = 0; cgx <= rvu->cgx_cnt_max; cgx++) {
                cgxd = rvu_cgx_pdata(cgx, rvu);
                if (!cgxd)
                        continue;
                lmac_bmap = cgx_get_lmac_bmap(cgxd);
                for_each_set_bit(lmac, &lmac_bmap, MAX_LMAC_PER_CGX) {
                        err = cgx_lmac_evh_register(&cb, cgxd, lmac);
                        if (err)
                                dev_err(rvu->dev,
                                        "%d:%d handler register failed\n",
                                        cgx, lmac);
                }
        }

        return 0;
}

static void rvu_cgx_wq_destroy(struct rvu *rvu)
{
        if (rvu->cgx_evh_wq) {
                destroy_workqueue(rvu->cgx_evh_wq);
                rvu->cgx_evh_wq = NULL;
        }
}

int rvu_cgx_init(struct rvu *rvu)
{
        int cgx, err;
        void *cgxd;

        /* CGX port id starts from 0 and are not necessarily contiguous
         * Hence we allocate resources based on the maximum port id value.
         */
        rvu->cgx_cnt_max = cgx_get_cgxcnt_max();
        if (!rvu->cgx_cnt_max) {
                dev_info(rvu->dev, "No CGX devices found!\n");
                return -ENODEV;
        }

        rvu->cgx_idmap = devm_kzalloc(rvu->dev, rvu->cgx_cnt_max *
                                      sizeof(void *), GFP_KERNEL);
        if (!rvu->cgx_idmap)
                return -ENOMEM;

        /* Initialize the cgxdata table */
        for (cgx = 0; cgx < rvu->cgx_cnt_max; cgx++)
                rvu->cgx_idmap[cgx] = cgx_get_pdata(cgx);

        /* Map CGX LMAC interfaces to RVU PFs */
        err = rvu_map_cgx_lmac_pf(rvu);
        if (err)
                return err;

        /* Register for CGX events */
        err = cgx_lmac_event_handler_init(rvu);
        if (err)
                return err;

        mutex_init(&rvu->cgx_cfg_lock);

        /* Ensure event handler registration is completed, before
         * we turn on the links
         */
        mb();

        /* Do link up for all CGX ports */
        for (cgx = 0; cgx <= rvu->cgx_cnt_max; cgx++) {
                cgxd = rvu_cgx_pdata(cgx, rvu);
                if (!cgxd)
                        continue;
                err = cgx_lmac_linkup_start(cgxd);
                if (err)
                        dev_err(rvu->dev,
                                "Link up process failed to start on cgx %d\n",
                                cgx);
        }

        return 0;
}

int rvu_cgx_exit(struct rvu *rvu)
{
        unsigned long lmac_bmap;
        int cgx, lmac;
        void *cgxd;

        for (cgx = 0; cgx <= rvu->cgx_cnt_max; cgx++) {
                cgxd = rvu_cgx_pdata(cgx, rvu);
                if (!cgxd)
                        continue;
                lmac_bmap = cgx_get_lmac_bmap(cgxd);
                for_each_set_bit(lmac, &lmac_bmap, MAX_LMAC_PER_CGX)
                        cgx_lmac_evh_unregister(cgxd, lmac);
        }

        /* Ensure event handler unregister is completed */
        mb();

        rvu_cgx_wq_destroy(rvu);
        return 0;
}

/* Most of the CGX configuration is restricted to the mapped PF only,
 * VF's of mapped PF and other PFs are not allowed. This fn() checks
 * whether a PFFUNC is permitted to do the config or not.
 */
inline bool is_cgx_config_permitted(struct rvu *rvu, u16 pcifunc)
{
        if ((pcifunc & RVU_PFVF_FUNC_MASK) ||
            !is_pf_cgxmapped(rvu, rvu_get_pf(pcifunc)))
                return false;
        return true;
}

void rvu_cgx_enadis_rx_bp(struct rvu *rvu, int pf, bool enable)
{
        struct mac_ops *mac_ops;
        u8 cgx_id, lmac_id;
        void *cgxd;

        if (!is_pf_cgxmapped(rvu, pf))
                return;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
        cgxd = rvu_cgx_pdata(cgx_id, rvu);

        mac_ops = get_mac_ops(cgxd);
        /* Set / clear CTL_BCK to control pause frame forwarding to NIX */
        if (enable)
                mac_ops->mac_enadis_rx_pause_fwding(cgxd, lmac_id, true);
        else
                mac_ops->mac_enadis_rx_pause_fwding(cgxd, lmac_id, false);
}

int rvu_cgx_config_rxtx(struct rvu *rvu, u16 pcifunc, bool start)
{
        int pf = rvu_get_pf(pcifunc);
        struct mac_ops *mac_ops;
        u8 cgx_id, lmac_id;
        void *cgxd;

        if (!is_cgx_config_permitted(rvu, pcifunc))
                return LMAC_AF_ERR_PERM_DENIED;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
        cgxd = rvu_cgx_pdata(cgx_id, rvu);
        mac_ops = get_mac_ops(cgxd);

        return mac_ops->mac_rx_tx_enable(cgxd, lmac_id, start);
}

int rvu_cgx_config_tx(void *cgxd, int lmac_id, bool enable)
{
        struct mac_ops *mac_ops;

        mac_ops = get_mac_ops(cgxd);
        return mac_ops->mac_tx_enable(cgxd, lmac_id, enable);
}

void rvu_cgx_disable_dmac_entries(struct rvu *rvu, u16 pcifunc)
{
        int pf = rvu_get_pf(pcifunc);
        int i = 0, lmac_count = 0;
        u8 max_dmac_filters;
        u8 cgx_id, lmac_id;
        void *cgx_dev;

        if (!is_cgx_config_permitted(rvu, pcifunc))
                return;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
        cgx_dev = cgx_get_pdata(cgx_id);
        lmac_count = cgx_get_lmac_cnt(cgx_dev);
        max_dmac_filters = MAX_DMAC_ENTRIES_PER_CGX / lmac_count;

        for (i = 0; i < max_dmac_filters; i++)
                cgx_lmac_addr_del(cgx_id, lmac_id, i);

        /* As cgx_lmac_addr_del does not clear entry for index 0
         * so it needs to be done explicitly
         */
        cgx_lmac_addr_reset(cgx_id, lmac_id);
}

int rvu_mbox_handler_cgx_start_rxtx(struct rvu *rvu, struct msg_req *req,
                                    struct msg_rsp *rsp)
{
        rvu_cgx_config_rxtx(rvu, req->hdr.pcifunc, true);
        return 0;
}

int rvu_mbox_handler_cgx_stop_rxtx(struct rvu *rvu, struct msg_req *req,
                                   struct msg_rsp *rsp)
{
        rvu_cgx_config_rxtx(rvu, req->hdr.pcifunc, false);
        return 0;
}

static int rvu_lmac_get_stats(struct rvu *rvu, struct msg_req *req,
                              void *rsp)
{
        int pf = rvu_get_pf(req->hdr.pcifunc);
        struct mac_ops *mac_ops;
        int stat = 0, err = 0;
        u64 tx_stat, rx_stat;
        u8 cgx_idx, lmac;
        void *cgxd;

        if (!is_cgx_config_permitted(rvu, req->hdr.pcifunc))
                return LMAC_AF_ERR_PERM_DENIED;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_idx, &lmac);
        cgxd = rvu_cgx_pdata(cgx_idx, rvu);
        mac_ops = get_mac_ops(cgxd);

        /* Rx stats */
        while (stat < mac_ops->rx_stats_cnt) {
                err = mac_ops->mac_get_rx_stats(cgxd, lmac, stat, &rx_stat);
                if (err)
                        return err;
                if (mac_ops->rx_stats_cnt == RPM_RX_STATS_COUNT)
                        ((struct rpm_stats_rsp *)rsp)->rx_stats[stat] = rx_stat;
                else
                        ((struct cgx_stats_rsp *)rsp)->rx_stats[stat] = rx_stat;
                stat++;
        }

        /* Tx stats */
        stat = 0;
        while (stat < mac_ops->tx_stats_cnt) {
                err = mac_ops->mac_get_tx_stats(cgxd, lmac, stat, &tx_stat);
                if (err)
                        return err;
                if (mac_ops->tx_stats_cnt == RPM_TX_STATS_COUNT)
                        ((struct rpm_stats_rsp *)rsp)->tx_stats[stat] = tx_stat;
                else
                        ((struct cgx_stats_rsp *)rsp)->tx_stats[stat] = tx_stat;
                stat++;
        }
        return 0;
}

int rvu_mbox_handler_cgx_stats(struct rvu *rvu, struct msg_req *req,
                               struct cgx_stats_rsp *rsp)
{
        return rvu_lmac_get_stats(rvu, req, (void *)rsp);
}

int rvu_mbox_handler_rpm_stats(struct rvu *rvu, struct msg_req *req,
                               struct rpm_stats_rsp *rsp)
{
        return rvu_lmac_get_stats(rvu, req, (void *)rsp);
}

int rvu_mbox_handler_cgx_fec_stats(struct rvu *rvu,
                                   struct msg_req *req,
                                   struct cgx_fec_stats_rsp *rsp)
{
        int pf = rvu_get_pf(req->hdr.pcifunc);
        u8 cgx_idx, lmac;
        void *cgxd;

        if (!is_cgx_config_permitted(rvu, req->hdr.pcifunc))
                return LMAC_AF_ERR_PERM_DENIED;
        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_idx, &lmac);

        cgxd = rvu_cgx_pdata(cgx_idx, rvu);
        return cgx_get_fec_stats(cgxd, lmac, rsp);
}

int rvu_mbox_handler_cgx_mac_addr_set(struct rvu *rvu,
                                      struct cgx_mac_addr_set_or_get *req,
                                      struct cgx_mac_addr_set_or_get *rsp)
{
        int pf = rvu_get_pf(req->hdr.pcifunc);
        u8 cgx_id, lmac_id;

        if (!is_cgx_config_permitted(rvu, req->hdr.pcifunc))
                return -EPERM;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);

        cgx_lmac_addr_set(cgx_id, lmac_id, req->mac_addr);

        return 0;
}

int rvu_mbox_handler_cgx_mac_addr_add(struct rvu *rvu,
                                      struct cgx_mac_addr_add_req *req,
                                      struct cgx_mac_addr_add_rsp *rsp)
{
        int pf = rvu_get_pf(req->hdr.pcifunc);
        u8 cgx_id, lmac_id;
        int rc = 0;

        if (!is_cgx_config_permitted(rvu, req->hdr.pcifunc))
                return -EPERM;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
        rc = cgx_lmac_addr_add(cgx_id, lmac_id, req->mac_addr);
        if (rc >= 0) {
                rsp->index = rc;
                return 0;
        }

        return rc;
}

int rvu_mbox_handler_cgx_mac_addr_del(struct rvu *rvu,
                                      struct cgx_mac_addr_del_req *req,
                                      struct msg_rsp *rsp)
{
        int pf = rvu_get_pf(req->hdr.pcifunc);
        u8 cgx_id, lmac_id;

        if (!is_cgx_config_permitted(rvu, req->hdr.pcifunc))
                return -EPERM;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
        return cgx_lmac_addr_del(cgx_id, lmac_id, req->index);
}

int rvu_mbox_handler_cgx_mac_max_entries_get(struct rvu *rvu,
                                             struct msg_req *req,
                                             struct cgx_max_dmac_entries_get_rsp
                                             *rsp)
{
        int pf = rvu_get_pf(req->hdr.pcifunc);
        u8 cgx_id, lmac_id;

        /* If msg is received from PFs(which are not mapped to CGX LMACs)
         * or VF then no entries are allocated for DMAC filters at CGX level.
         * So returning zero.
         */
        if (!is_cgx_config_permitted(rvu, req->hdr.pcifunc)) {
                rsp->max_dmac_filters = 0;
                return 0;
        }

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
        rsp->max_dmac_filters = cgx_lmac_addr_max_entries_get(cgx_id, lmac_id);
        return 0;
}

int rvu_mbox_handler_cgx_mac_addr_get(struct rvu *rvu,
                                      struct cgx_mac_addr_set_or_get *req,
                                      struct cgx_mac_addr_set_or_get *rsp)
{
        int pf = rvu_get_pf(req->hdr.pcifunc);
        u8 cgx_id, lmac_id;
        int rc = 0, i;
        u64 cfg;

        if (!is_cgx_config_permitted(rvu, req->hdr.pcifunc))
                return -EPERM;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);

        rsp->hdr.rc = rc;
        cfg = cgx_lmac_addr_get(cgx_id, lmac_id);
        /* copy 48 bit mac address to req->mac_addr */
        for (i = 0; i < ETH_ALEN; i++)
                rsp->mac_addr[i] = cfg >> (ETH_ALEN - 1 - i) * 8;
        return 0;
}

int rvu_mbox_handler_cgx_promisc_enable(struct rvu *rvu, struct msg_req *req,
                                        struct msg_rsp *rsp)
{
        u16 pcifunc = req->hdr.pcifunc;
        int pf = rvu_get_pf(pcifunc);
        u8 cgx_id, lmac_id;

        if (!is_cgx_config_permitted(rvu, req->hdr.pcifunc))
                return -EPERM;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);

        cgx_lmac_promisc_config(cgx_id, lmac_id, true);
        return 0;
}

int rvu_mbox_handler_cgx_promisc_disable(struct rvu *rvu, struct msg_req *req,
                                         struct msg_rsp *rsp)
{
        int pf = rvu_get_pf(req->hdr.pcifunc);
        u8 cgx_id, lmac_id;

        if (!is_cgx_config_permitted(rvu, req->hdr.pcifunc))
                return -EPERM;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);

        cgx_lmac_promisc_config(cgx_id, lmac_id, false);
        return 0;
}

static int rvu_cgx_ptp_rx_cfg(struct rvu *rvu, u16 pcifunc, bool enable)
{
        struct rvu_pfvf *pfvf = rvu_get_pfvf(rvu, pcifunc);
        int pf = rvu_get_pf(pcifunc);
        struct mac_ops *mac_ops;
        u8 cgx_id, lmac_id;
        void *cgxd;

        if (!is_mac_feature_supported(rvu, pf, RVU_LMAC_FEAT_PTP))
                return 0;

        /* This msg is expected only from PFs that are mapped to CGX LMACs,
         * if received from other PF/VF simply ACK, nothing to do.
         */
        if ((pcifunc & RVU_PFVF_FUNC_MASK) ||
            !is_pf_cgxmapped(rvu, pf))
                return -ENODEV;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
        cgxd = rvu_cgx_pdata(cgx_id, rvu);

        mac_ops = get_mac_ops(cgxd);
        mac_ops->mac_enadis_ptp_config(cgxd, lmac_id, true);
        /* If PTP is enabled then inform NPC that packets to be
         * parsed by this PF will have their data shifted by 8 bytes
         * and if PTP is disabled then no shift is required
         */
        if (npc_config_ts_kpuaction(rvu, pf, pcifunc, enable))
                return -EINVAL;
        /* This flag is required to clean up CGX conf if app gets killed */
        pfvf->hw_rx_tstamp_en = enable;

        return 0;
}

int rvu_mbox_handler_cgx_ptp_rx_enable(struct rvu *rvu, struct msg_req *req,
                                       struct msg_rsp *rsp)
{
        if (!is_pf_cgxmapped(rvu, rvu_get_pf(req->hdr.pcifunc)))
                return -EPERM;

        return rvu_cgx_ptp_rx_cfg(rvu, req->hdr.pcifunc, true);
}

int rvu_mbox_handler_cgx_ptp_rx_disable(struct rvu *rvu, struct msg_req *req,
                                        struct msg_rsp *rsp)
{
        return rvu_cgx_ptp_rx_cfg(rvu, req->hdr.pcifunc, false);
}

static int rvu_cgx_config_linkevents(struct rvu *rvu, u16 pcifunc, bool en)
{
        int pf = rvu_get_pf(pcifunc);
        u8 cgx_id, lmac_id;

        if (!is_cgx_config_permitted(rvu, pcifunc))
                return -EPERM;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);

        if (en) {
                set_bit(pf, &rvu->pf_notify_bmap);
                /* Send the current link status to PF */
                rvu_cgx_send_link_info(cgx_id, lmac_id, rvu);
        } else {
                clear_bit(pf, &rvu->pf_notify_bmap);
        }

        return 0;
}

int rvu_mbox_handler_cgx_start_linkevents(struct rvu *rvu, struct msg_req *req,
                                          struct msg_rsp *rsp)
{
        rvu_cgx_config_linkevents(rvu, req->hdr.pcifunc, true);
        return 0;
}

int rvu_mbox_handler_cgx_stop_linkevents(struct rvu *rvu, struct msg_req *req,
                                         struct msg_rsp *rsp)
{
        rvu_cgx_config_linkevents(rvu, req->hdr.pcifunc, false);
        return 0;
}

int rvu_mbox_handler_cgx_get_linkinfo(struct rvu *rvu, struct msg_req *req,
                                      struct cgx_link_info_msg *rsp)
{
        u8 cgx_id, lmac_id;
        int pf, err;

        pf = rvu_get_pf(req->hdr.pcifunc);

        if (!is_pf_cgxmapped(rvu, pf))
                return -ENODEV;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);

        err = cgx_get_link_info(rvu_cgx_pdata(cgx_id, rvu), lmac_id,
                                &rsp->link_info);
        return err;
}

int rvu_mbox_handler_cgx_features_get(struct rvu *rvu,
                                      struct msg_req *req,
                                      struct cgx_features_info_msg *rsp)
{
        int pf = rvu_get_pf(req->hdr.pcifunc);
        u8 cgx_idx, lmac;
        void *cgxd;

        if (!is_pf_cgxmapped(rvu, pf))
                return 0;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_idx, &lmac);
        cgxd = rvu_cgx_pdata(cgx_idx, rvu);
        rsp->lmac_features = cgx_features_get(cgxd);

        return 0;
}

u32 rvu_cgx_get_fifolen(struct rvu *rvu)
{
        struct mac_ops *mac_ops;
        u32 fifo_len;

        mac_ops = get_mac_ops(rvu_first_cgx_pdata(rvu));
        fifo_len = mac_ops ? mac_ops->fifo_len : 0;

        return fifo_len;
}

static int rvu_cgx_config_intlbk(struct rvu *rvu, u16 pcifunc, bool en)
{
        int pf = rvu_get_pf(pcifunc);
        struct mac_ops *mac_ops;
        u8 cgx_id, lmac_id;

        if (!is_cgx_config_permitted(rvu, pcifunc))
                return -EPERM;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
        mac_ops = get_mac_ops(rvu_cgx_pdata(cgx_id, rvu));

        return mac_ops->mac_lmac_intl_lbk(rvu_cgx_pdata(cgx_id, rvu),
                                          lmac_id, en);
}

int rvu_mbox_handler_cgx_intlbk_enable(struct rvu *rvu, struct msg_req *req,
                                       struct msg_rsp *rsp)
{
        rvu_cgx_config_intlbk(rvu, req->hdr.pcifunc, true);
        return 0;
}

int rvu_mbox_handler_cgx_intlbk_disable(struct rvu *rvu, struct msg_req *req,
                                        struct msg_rsp *rsp)
{
        rvu_cgx_config_intlbk(rvu, req->hdr.pcifunc, false);
        return 0;
}

int rvu_cgx_cfg_pause_frm(struct rvu *rvu, u16 pcifunc, u8 tx_pause, u8 rx_pause)
{
        int pf = rvu_get_pf(pcifunc);
        u8 rx_pfc = 0, tx_pfc = 0;
        struct mac_ops *mac_ops;
        u8 cgx_id, lmac_id;
        void *cgxd;

        if (!is_mac_feature_supported(rvu, pf, RVU_LMAC_FEAT_FC))
                return 0;

        /* This msg is expected only from PF/VFs that are mapped to CGX LMACs,
         * if received from other PF/VF simply ACK, nothing to do.
         */
        if (!is_pf_cgxmapped(rvu, pf))
                return LMAC_AF_ERR_PF_NOT_MAPPED;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
        cgxd = rvu_cgx_pdata(cgx_id, rvu);
        mac_ops = get_mac_ops(cgxd);

        mac_ops->mac_get_pfc_frm_cfg(cgxd, lmac_id, &tx_pfc, &rx_pfc);
        if (tx_pfc || rx_pfc) {
                dev_warn(rvu->dev,
                         "Can not configure 802.3X flow control as PFC frames are enabled");
                return LMAC_AF_ERR_8023PAUSE_ENADIS_PERM_DENIED;
        }

        mutex_lock(&rvu->rsrc_lock);
        if (verify_lmac_fc_cfg(cgxd, lmac_id, tx_pause, rx_pause,
                               pcifunc & RVU_PFVF_FUNC_MASK)) {
                mutex_unlock(&rvu->rsrc_lock);
                return LMAC_AF_ERR_PERM_DENIED;
        }
        mutex_unlock(&rvu->rsrc_lock);

        return mac_ops->mac_enadis_pause_frm(cgxd, lmac_id, tx_pause, rx_pause);
}

int rvu_mbox_handler_cgx_cfg_pause_frm(struct rvu *rvu,
                                       struct cgx_pause_frm_cfg *req,
                                       struct cgx_pause_frm_cfg *rsp)
{
        int pf = rvu_get_pf(req->hdr.pcifunc);
        struct mac_ops *mac_ops;
        u8 cgx_id, lmac_id;
        int err = 0;
        void *cgxd;

        /* This msg is expected only from PF/VFs that are mapped to CGX LMACs,
         * if received from other PF/VF simply ACK, nothing to do.
         */
        if (!is_pf_cgxmapped(rvu, pf))
                return -ENODEV;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
        cgxd = rvu_cgx_pdata(cgx_id, rvu);
        mac_ops = get_mac_ops(cgxd);

        if (req->set)
                err = rvu_cgx_cfg_pause_frm(rvu, req->hdr.pcifunc, req->tx_pause, req->rx_pause);
        else
                mac_ops->mac_get_pause_frm_status(cgxd, lmac_id, &rsp->tx_pause, &rsp->rx_pause);

        return err;
}

int rvu_mbox_handler_cgx_get_phy_fec_stats(struct rvu *rvu, struct msg_req *req,
                                           struct msg_rsp *rsp)
{
        int pf = rvu_get_pf(req->hdr.pcifunc);
        u8 cgx_id, lmac_id;

        if (!is_pf_cgxmapped(rvu, pf))
                return LMAC_AF_ERR_PF_NOT_MAPPED;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
        return cgx_get_phy_fec_stats(rvu_cgx_pdata(cgx_id, rvu), lmac_id);
}

/* Finds cumulative status of NIX rx/tx counters from LF of a PF and those
 * from its VFs as well. ie. NIX rx/tx counters at the CGX port level
 */
int rvu_cgx_nix_cuml_stats(struct rvu *rvu, void *cgxd, int lmac_id,
                           int index, int rxtxflag, u64 *stat)
{
        struct rvu_block *block;
        int blkaddr;
        u16 pcifunc;
        int pf, lf;

        *stat = 0;

        if (!cgxd || !rvu)
                return -EINVAL;

        pf = cgxlmac_to_pf(rvu, cgx_get_cgxid(cgxd), lmac_id);
        if (pf < 0)
                return pf;

        /* Assumes LF of a PF and all of its VF belongs to the same
         * NIX block
         */
        pcifunc = pf << RVU_PFVF_PF_SHIFT;
        blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NIX, pcifunc);
        if (blkaddr < 0)
                return 0;
        block = &rvu->hw->block[blkaddr];

        for (lf = 0; lf < block->lf.max; lf++) {
                /* Check if a lf is attached to this PF or one of its VFs */
                if (!((block->fn_map[lf] & ~RVU_PFVF_FUNC_MASK) == (pcifunc &
                         ~RVU_PFVF_FUNC_MASK)))
                        continue;
                if (rxtxflag == NIX_STATS_RX)
                        *stat += rvu_read64(rvu, blkaddr,
                                            NIX_AF_LFX_RX_STATX(lf, index));
                else
                        *stat += rvu_read64(rvu, blkaddr,
                                            NIX_AF_LFX_TX_STATX(lf, index));
        }

        return 0;
}

int rvu_cgx_start_stop_io(struct rvu *rvu, u16 pcifunc, bool start)
{
        struct rvu_pfvf *parent_pf, *pfvf;
        int cgx_users, err = 0;

        if (!is_pf_cgxmapped(rvu, rvu_get_pf(pcifunc)))
                return 0;

        parent_pf = &rvu->pf[rvu_get_pf(pcifunc)];
        pfvf = rvu_get_pfvf(rvu, pcifunc);

        mutex_lock(&rvu->cgx_cfg_lock);

        if (start && pfvf->cgx_in_use)
                goto exit;  /* CGX is already started hence nothing to do */
        if (!start && !pfvf->cgx_in_use)
                goto exit; /* CGX is already stopped hence nothing to do */

        if (start) {
                cgx_users = parent_pf->cgx_users;
                parent_pf->cgx_users++;
        } else {
                parent_pf->cgx_users--;
                cgx_users = parent_pf->cgx_users;
        }

        /* Start CGX when first of all NIXLFs is started.
         * Stop CGX when last of all NIXLFs is stopped.
         */
        if (!cgx_users) {
                err = rvu_cgx_config_rxtx(rvu, pcifunc & ~RVU_PFVF_FUNC_MASK,
                                          start);
                if (err) {
                        dev_err(rvu->dev, "Unable to %s CGX\n",
                                start ? "start" : "stop");
                        /* Revert the usage count in case of error */
                        parent_pf->cgx_users = start ? parent_pf->cgx_users  - 1
                                               : parent_pf->cgx_users  + 1;
                        goto exit;
                }
        }
        pfvf->cgx_in_use = start;
exit:
        mutex_unlock(&rvu->cgx_cfg_lock);
        return err;
}

int rvu_mbox_handler_cgx_set_fec_param(struct rvu *rvu,
                                       struct fec_mode *req,
                                       struct fec_mode *rsp)
{
        int pf = rvu_get_pf(req->hdr.pcifunc);
        u8 cgx_id, lmac_id;

        if (!is_pf_cgxmapped(rvu, pf))
                return -EPERM;

        if (req->fec == OTX2_FEC_OFF)
                req->fec = OTX2_FEC_NONE;
        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
        rsp->fec = cgx_set_fec(req->fec, cgx_id, lmac_id);
        return 0;
}

int rvu_mbox_handler_cgx_get_aux_link_info(struct rvu *rvu, struct msg_req *req,
                                           struct cgx_fw_data *rsp)
{
        int pf = rvu_get_pf(req->hdr.pcifunc);
        u8 cgx_id, lmac_id;

        if (!rvu->fwdata)
                return -ENXIO;

        if (!is_pf_cgxmapped(rvu, pf))
                return -EPERM;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);

        memcpy(&rsp->fwdata, &rvu->fwdata->cgx_fw_data[cgx_id][lmac_id],
               sizeof(struct cgx_lmac_fwdata_s));
        return 0;
}

int rvu_mbox_handler_cgx_set_link_mode(struct rvu *rvu,
                                       struct cgx_set_link_mode_req *req,
                                       struct cgx_set_link_mode_rsp *rsp)
{
        int pf = rvu_get_pf(req->hdr.pcifunc);
        u8 cgx_idx, lmac;
        void *cgxd;

        if (!is_cgx_config_permitted(rvu, req->hdr.pcifunc))
                return -EPERM;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_idx, &lmac);
        cgxd = rvu_cgx_pdata(cgx_idx, rvu);
        rsp->status = cgx_set_link_mode(cgxd, req->args, cgx_idx, lmac);
        return 0;
}

int rvu_mbox_handler_cgx_mac_addr_reset(struct rvu *rvu, struct msg_req *req,
                                        struct msg_rsp *rsp)
{
        int pf = rvu_get_pf(req->hdr.pcifunc);
        u8 cgx_id, lmac_id;

        if (!is_cgx_config_permitted(rvu, req->hdr.pcifunc))
                return LMAC_AF_ERR_PERM_DENIED;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
        return cgx_lmac_addr_reset(cgx_id, lmac_id);
}

int rvu_mbox_handler_cgx_mac_addr_update(struct rvu *rvu,
                                         struct cgx_mac_addr_update_req *req,
                                         struct msg_rsp *rsp)
{
        int pf = rvu_get_pf(req->hdr.pcifunc);
        u8 cgx_id, lmac_id;

        if (!is_cgx_config_permitted(rvu, req->hdr.pcifunc))
                return LMAC_AF_ERR_PERM_DENIED;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
        return cgx_lmac_addr_update(cgx_id, lmac_id, req->mac_addr, req->index);
}

int rvu_cgx_prio_flow_ctrl_cfg(struct rvu *rvu, u16 pcifunc, u8 tx_pause,
                               u8 rx_pause, u16 pfc_en)
{
        int pf = rvu_get_pf(pcifunc);
        u8 rx_8023 = 0, tx_8023 = 0;
        struct mac_ops *mac_ops;
        u8 cgx_id, lmac_id;
        void *cgxd;

        /* This msg is expected only from PF/VFs that are mapped to CGX LMACs,
         * if received from other PF/VF simply ACK, nothing to do.
         */
        if (!is_pf_cgxmapped(rvu, pf))
                return -ENODEV;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
        cgxd = rvu_cgx_pdata(cgx_id, rvu);
        mac_ops = get_mac_ops(cgxd);

        mac_ops->mac_get_pause_frm_status(cgxd, lmac_id, &tx_8023, &rx_8023);
        if (tx_8023 || rx_8023) {
                dev_warn(rvu->dev,
                         "Can not configure PFC as 802.3X pause frames are enabled");
                return LMAC_AF_ERR_PFC_ENADIS_PERM_DENIED;
        }

        mutex_lock(&rvu->rsrc_lock);
        if (verify_lmac_fc_cfg(cgxd, lmac_id, tx_pause, rx_pause,
                               pcifunc & RVU_PFVF_FUNC_MASK)) {
                mutex_unlock(&rvu->rsrc_lock);
                return LMAC_AF_ERR_PERM_DENIED;
        }
        mutex_unlock(&rvu->rsrc_lock);

        return mac_ops->pfc_config(cgxd, lmac_id, tx_pause, rx_pause, pfc_en);
}

int rvu_mbox_handler_cgx_prio_flow_ctrl_cfg(struct rvu *rvu,
                                            struct cgx_pfc_cfg *req,
                                            struct cgx_pfc_rsp *rsp)
{
        int pf = rvu_get_pf(req->hdr.pcifunc);
        struct mac_ops *mac_ops;
        u8 cgx_id, lmac_id;
        void *cgxd;
        int err;

        /* This msg is expected only from PF/VFs that are mapped to CGX LMACs,
         * if received from other PF/VF simply ACK, nothing to do.
         */
        if (!is_pf_cgxmapped(rvu, pf))
                return -ENODEV;

        rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
        cgxd = rvu_cgx_pdata(cgx_id, rvu);
        mac_ops = get_mac_ops(cgxd);

        err = rvu_cgx_prio_flow_ctrl_cfg(rvu, req->hdr.pcifunc, req->tx_pause,
                                         req->rx_pause, req->pfc_en);

        mac_ops->mac_get_pfc_frm_cfg(cgxd, lmac_id, &rsp->tx_pause, &rsp->rx_pause);
        return err;
}