/*
 * Copyright (c) 2016~2017 Hisilicon Limited.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/dma-mapping.h>
#include <linux/etherdevice.h>
#include <linux/interrupt.h>
#include <linux/if_vlan.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/skbuff.h>
#include <linux/sctp.h>
#include <linux/vermagic.h>
#include <net/gre.h>
#include <net/vxlan.h>

#include "hnae3.h"
#include "hns3_enet.h"

const char hns3_driver_name[] = "hns3";
const char hns3_driver_version[] = VERMAGIC_STRING;
static const char hns3_driver_string[] =
                        "Hisilicon Ethernet Network Driver for Hip08 Family";
static const char hns3_copyright[] = "Copyright (c) 2017 Huawei Corporation.";
static struct hnae3_client client;

/* hns3_pci_tbl - PCI Device ID Table
 *
 * Last entry must be all 0s
 *
 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
 *   Class, Class Mask, private data (not used) }
 */
static const struct pci_device_id hns3_pci_tbl[] = {
        {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_GE), 0},
        {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_25GE), 0},
        {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_25GE_RDMA),
         HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
        {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_25GE_RDMA_MACSEC),
         HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
        {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_50GE_RDMA),
         HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
        {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_50GE_RDMA_MACSEC),
         HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
        {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_100G_RDMA_MACSEC),
         HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
        /* required last entry */
        {0, }
};
MODULE_DEVICE_TABLE(pci, hns3_pci_tbl);

static irqreturn_t hns3_irq_handle(int irq, void *dev)
{
        struct hns3_enet_tqp_vector *tqp_vector = dev;

        napi_schedule(&tqp_vector->napi);

        return IRQ_HANDLED;
}

static void hns3_nic_uninit_irq(struct hns3_nic_priv *priv)
{
        struct hns3_enet_tqp_vector *tqp_vectors;
        unsigned int i;

        for (i = 0; i < priv->vector_num; i++) {
                tqp_vectors = &priv->tqp_vector[i];

                if (tqp_vectors->irq_init_flag != HNS3_VECTOR_INITED)
                        continue;

                /* release the irq resource */
                free_irq(tqp_vectors->vector_irq, tqp_vectors);
                tqp_vectors->irq_init_flag = HNS3_VECTOR_NOT_INITED;
        }
}

static int hns3_nic_init_irq(struct hns3_nic_priv *priv)
{
        struct hns3_enet_tqp_vector *tqp_vectors;
        int txrx_int_idx = 0;
        int rx_int_idx = 0;
        int tx_int_idx = 0;
        unsigned int i;
        int ret;

        for (i = 0; i < priv->vector_num; i++) {
                tqp_vectors = &priv->tqp_vector[i];

                if (tqp_vectors->irq_init_flag == HNS3_VECTOR_INITED)
                        continue;

                if (tqp_vectors->tx_group.ring && tqp_vectors->rx_group.ring) {
                        snprintf(tqp_vectors->name, HNAE3_INT_NAME_LEN - 1,
                                 "%s-%s-%d", priv->netdev->name, "TxRx",
                                 txrx_int_idx++);
                        txrx_int_idx++;
                } else if (tqp_vectors->rx_group.ring) {
                        snprintf(tqp_vectors->name, HNAE3_INT_NAME_LEN - 1,
                                 "%s-%s-%d", priv->netdev->name, "Rx",
                                 rx_int_idx++);
                } else if (tqp_vectors->tx_group.ring) {
                        snprintf(tqp_vectors->name, HNAE3_INT_NAME_LEN - 1,
                                 "%s-%s-%d", priv->netdev->name, "Tx",
                                 tx_int_idx++);
                } else {
                        /* Skip this unused q_vector */
                        continue;
                }

                tqp_vectors->name[HNAE3_INT_NAME_LEN - 1] = '\0';

                ret = request_irq(tqp_vectors->vector_irq, hns3_irq_handle, 0,
                                  tqp_vectors->name,
                                       tqp_vectors);
                if (ret) {
                        netdev_err(priv->netdev, "request irq(%d) fail\n",
                                   tqp_vectors->vector_irq);
                        return ret;
                }

                tqp_vectors->irq_init_flag = HNS3_VECTOR_INITED;
        }

        return 0;
}

static void hns3_mask_vector_irq(struct hns3_enet_tqp_vector *tqp_vector,
                                 u32 mask_en)
{
        writel(mask_en, tqp_vector->mask_addr);
}

static void hns3_vector_enable(struct hns3_enet_tqp_vector *tqp_vector)
{
        napi_enable(&tqp_vector->napi);

        /* enable vector */
        hns3_mask_vector_irq(tqp_vector, 1);
}

static void hns3_vector_disable(struct hns3_enet_tqp_vector *tqp_vector)
{
        /* disable vector */
        hns3_mask_vector_irq(tqp_vector, 0);

        disable_irq(tqp_vector->vector_irq);
        napi_disable(&tqp_vector->napi);
}

static void hns3_set_vector_coalesc_gl(struct hns3_enet_tqp_vector *tqp_vector,
                                       u32 gl_value)
{
        /* this defines the configuration for GL (Interrupt Gap Limiter)
         * GL defines inter interrupt gap.
         * GL and RL(Rate Limiter) are 2 ways to acheive interrupt coalescing
         */
        writel(gl_value, tqp_vector->mask_addr + HNS3_VECTOR_GL0_OFFSET);
        writel(gl_value, tqp_vector->mask_addr + HNS3_VECTOR_GL1_OFFSET);
        writel(gl_value, tqp_vector->mask_addr + HNS3_VECTOR_GL2_OFFSET);
}

static void hns3_set_vector_coalesc_rl(struct hns3_enet_tqp_vector *tqp_vector,
                                       u32 rl_value)
{
        /* this defines the configuration for RL (Interrupt Rate Limiter).
         * Rl defines rate of interrupts i.e. number of interrupts-per-second
         * GL and RL(Rate Limiter) are 2 ways to acheive interrupt coalescing
         */
        writel(rl_value, tqp_vector->mask_addr + HNS3_VECTOR_RL_OFFSET);
}

static void hns3_vector_gl_rl_init(struct hns3_enet_tqp_vector *tqp_vector)
{
        /* initialize the configuration for interrupt coalescing.
         * 1. GL (Interrupt Gap Limiter)
         * 2. RL (Interrupt Rate Limiter)
         */

        /* Default :enable interrupt coalesce */
        tqp_vector->rx_group.int_gl = HNS3_INT_GL_50K;
        tqp_vector->tx_group.int_gl = HNS3_INT_GL_50K;
        hns3_set_vector_coalesc_gl(tqp_vector, HNS3_INT_GL_50K);
        /* for now we are disabling Interrupt RL - we
         * will re-enable later
         */
        hns3_set_vector_coalesc_rl(tqp_vector, 0);
        tqp_vector->rx_group.flow_level = HNS3_FLOW_LOW;
        tqp_vector->tx_group.flow_level = HNS3_FLOW_LOW;
}

static int hns3_nic_net_up(struct net_device *netdev)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        struct hnae3_handle *h = priv->ae_handle;
        int i, j;
        int ret;

        /* get irq resource for all vectors */
        ret = hns3_nic_init_irq(priv);
        if (ret) {
                netdev_err(netdev, "hns init irq failed! ret=%d\n", ret);
                return ret;
        }

        /* enable the vectors */
        for (i = 0; i < priv->vector_num; i++)
                hns3_vector_enable(&priv->tqp_vector[i]);

        /* start the ae_dev */
        ret = h->ae_algo->ops->start ? h->ae_algo->ops->start(h) : 0;
        if (ret)
                goto out_start_err;

        return 0;

out_start_err:
        for (j = i - 1; j >= 0; j--)
                hns3_vector_disable(&priv->tqp_vector[j]);

        hns3_nic_uninit_irq(priv);

        return ret;
}

static int hns3_nic_net_open(struct net_device *netdev)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        struct hnae3_handle *h = priv->ae_handle;
        int ret;

        netif_carrier_off(netdev);

        ret = netif_set_real_num_tx_queues(netdev, h->kinfo.num_tqps);
        if (ret) {
                netdev_err(netdev,
                           "netif_set_real_num_tx_queues fail, ret=%d!\n",
                           ret);
                return ret;
        }

        ret = netif_set_real_num_rx_queues(netdev, h->kinfo.num_tqps);
        if (ret) {
                netdev_err(netdev,
                           "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
                return ret;
        }

        ret = hns3_nic_net_up(netdev);
        if (ret) {
                netdev_err(netdev,
                           "hns net up fail, ret=%d!\n", ret);
                return ret;
        }

        return 0;
}

static void hns3_nic_net_down(struct net_device *netdev)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        const struct hnae3_ae_ops *ops;
        int i;

        /* stop ae_dev */
        ops = priv->ae_handle->ae_algo->ops;
        if (ops->stop)
                ops->stop(priv->ae_handle);

        /* disable vectors */
        for (i = 0; i < priv->vector_num; i++)
                hns3_vector_disable(&priv->tqp_vector[i]);

        /* free irq resources */
        hns3_nic_uninit_irq(priv);
}

static int hns3_nic_net_stop(struct net_device *netdev)
{
        netif_tx_stop_all_queues(netdev);
        netif_carrier_off(netdev);

        hns3_nic_net_down(netdev);

        return 0;
}

void hns3_set_multicast_list(struct net_device *netdev)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        struct hnae3_handle *h = priv->ae_handle;
        struct netdev_hw_addr *ha = NULL;

        if (h->ae_algo->ops->set_mc_addr) {
                netdev_for_each_mc_addr(ha, netdev)
                        if (h->ae_algo->ops->set_mc_addr(h, ha->addr))
                                netdev_err(netdev, "set multicast fail\n");
        }
}

static int hns3_nic_uc_sync(struct net_device *netdev,
                            const unsigned char *addr)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        struct hnae3_handle *h = priv->ae_handle;

        if (h->ae_algo->ops->add_uc_addr)
                return h->ae_algo->ops->add_uc_addr(h, addr);

        return 0;
}

static int hns3_nic_uc_unsync(struct net_device *netdev,
                              const unsigned char *addr)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        struct hnae3_handle *h = priv->ae_handle;

        if (h->ae_algo->ops->rm_uc_addr)
                return h->ae_algo->ops->rm_uc_addr(h, addr);

        return 0;
}

static int hns3_nic_mc_sync(struct net_device *netdev,
                            const unsigned char *addr)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        struct hnae3_handle *h = priv->ae_handle;

        if (h->ae_algo->ops->add_mc_addr)
                return h->ae_algo->ops->add_mc_addr(h, addr);

        return 0;
}

static int hns3_nic_mc_unsync(struct net_device *netdev,
                              const unsigned char *addr)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        struct hnae3_handle *h = priv->ae_handle;

        if (h->ae_algo->ops->rm_mc_addr)
                return h->ae_algo->ops->rm_mc_addr(h, addr);

        return 0;
}

void hns3_nic_set_rx_mode(struct net_device *netdev)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        struct hnae3_handle *h = priv->ae_handle;

        if (h->ae_algo->ops->set_promisc_mode) {
                if (netdev->flags & IFF_PROMISC)
                        h->ae_algo->ops->set_promisc_mode(h, 1);
                else
                        h->ae_algo->ops->set_promisc_mode(h, 0);
        }
        if (__dev_uc_sync(netdev, hns3_nic_uc_sync, hns3_nic_uc_unsync))
                netdev_err(netdev, "sync uc address fail\n");
        if (netdev->flags & IFF_MULTICAST)
                if (__dev_mc_sync(netdev, hns3_nic_mc_sync, hns3_nic_mc_unsync))
                        netdev_err(netdev, "sync mc address fail\n");
}

static int hns3_set_tso(struct sk_buff *skb, u32 *paylen,
                        u16 *mss, u32 *type_cs_vlan_tso)
{
        u32 l4_offset, hdr_len;
        union l3_hdr_info l3;
        union l4_hdr_info l4;
        u32 l4_paylen;
        int ret;

        if (!skb_is_gso(skb))
                return 0;

        ret = skb_cow_head(skb, 0);
        if (ret)
                return ret;

        l3.hdr = skb_network_header(skb);
        l4.hdr = skb_transport_header(skb);

        /* Software should clear the IPv4's checksum field when tso is
         * needed.
         */
        if (l3.v4->version == 4)
                l3.v4->check = 0;

        /* tunnel packet.*/
        if (skb_shinfo(skb)->gso_type & (SKB_GSO_GRE |
                                         SKB_GSO_GRE_CSUM |
                                         SKB_GSO_UDP_TUNNEL |
                                         SKB_GSO_UDP_TUNNEL_CSUM)) {
                if ((!(skb_shinfo(skb)->gso_type &
                    SKB_GSO_PARTIAL)) &&
                    (skb_shinfo(skb)->gso_type &
                    SKB_GSO_UDP_TUNNEL_CSUM)) {
                        /* Software should clear the udp's checksum
                         * field when tso is needed.
                         */
                        l4.udp->check = 0;
                }
                /* reset l3&l4 pointers from outer to inner headers */
                l3.hdr = skb_inner_network_header(skb);
                l4.hdr = skb_inner_transport_header(skb);

                /* Software should clear the IPv4's checksum field when
                 * tso is needed.
                 */
                if (l3.v4->version == 4)
                        l3.v4->check = 0;
        }

        /* normal or tunnel packet*/
        l4_offset = l4.hdr - skb->data;
        hdr_len = (l4.tcp->doff * 4) + l4_offset;

        /* remove payload length from inner pseudo checksum when tso*/
        l4_paylen = skb->len - l4_offset;
        csum_replace_by_diff(&l4.tcp->check,
                             (__force __wsum)htonl(l4_paylen));

        /* find the txbd field values */
        *paylen = skb->len - hdr_len;
        hnae_set_bit(*type_cs_vlan_tso,
                     HNS3_TXD_TSO_B, 1);

        /* get MSS for TSO */
        *mss = skb_shinfo(skb)->gso_size;

        return 0;
}

static int hns3_get_l4_protocol(struct sk_buff *skb, u8 *ol4_proto,
                                u8 *il4_proto)
{
        union {
                struct iphdr *v4;
                struct ipv6hdr *v6;
                unsigned char *hdr;
        } l3;
        unsigned char *l4_hdr;
        unsigned char *exthdr;
        u8 l4_proto_tmp;
        __be16 frag_off;

        /* find outer header point */
        l3.hdr = skb_network_header(skb);
        l4_hdr = skb_inner_transport_header(skb);

        if (skb->protocol == htons(ETH_P_IPV6)) {
                exthdr = l3.hdr + sizeof(*l3.v6);
                l4_proto_tmp = l3.v6->nexthdr;
                if (l4_hdr != exthdr)
                        ipv6_skip_exthdr(skb, exthdr - skb->data,
                                         &l4_proto_tmp, &frag_off);
        } else if (skb->protocol == htons(ETH_P_IP)) {
                l4_proto_tmp = l3.v4->protocol;
        } else {
                return -EINVAL;
        }

        *ol4_proto = l4_proto_tmp;

        /* tunnel packet */
        if (!skb->encapsulation) {
                *il4_proto = 0;
                return 0;
        }

        /* find inner header point */
        l3.hdr = skb_inner_network_header(skb);
        l4_hdr = skb_inner_transport_header(skb);

        if (l3.v6->version == 6) {
                exthdr = l3.hdr + sizeof(*l3.v6);
                l4_proto_tmp = l3.v6->nexthdr;
                if (l4_hdr != exthdr)
                        ipv6_skip_exthdr(skb, exthdr - skb->data,
                                         &l4_proto_tmp, &frag_off);
        } else if (l3.v4->version == 4) {
                l4_proto_tmp = l3.v4->protocol;
        }

        *il4_proto = l4_proto_tmp;

        return 0;
}

static void hns3_set_l2l3l4_len(struct sk_buff *skb, u8 ol4_proto,
                                u8 il4_proto, u32 *type_cs_vlan_tso,
                                u32 *ol_type_vlan_len_msec)
{
        union {
                struct iphdr *v4;
                struct ipv6hdr *v6;
                unsigned char *hdr;
        } l3;
        union {
                struct tcphdr *tcp;
                struct udphdr *udp;
                struct gre_base_hdr *gre;
                unsigned char *hdr;
        } l4;
        unsigned char *l2_hdr;
        u8 l4_proto = ol4_proto;
        u32 ol2_len;
        u32 ol3_len;
        u32 ol4_len;
        u32 l2_len;
        u32 l3_len;

        l3.hdr = skb_network_header(skb);
        l4.hdr = skb_transport_header(skb);

        /* compute L2 header size for normal packet, defined in 2 Bytes */
        l2_len = l3.hdr - skb->data;
        hnae_set_field(*type_cs_vlan_tso, HNS3_TXD_L2LEN_M,
                       HNS3_TXD_L2LEN_S, l2_len >> 1);

        /* tunnel packet*/
        if (skb->encapsulation) {
                /* compute OL2 header size, defined in 2 Bytes */
                ol2_len = l2_len;
                hnae_set_field(*ol_type_vlan_len_msec,
                               HNS3_TXD_L2LEN_M,
                               HNS3_TXD_L2LEN_S, ol2_len >> 1);

                /* compute OL3 header size, defined in 4 Bytes */
                ol3_len = l4.hdr - l3.hdr;
                hnae_set_field(*ol_type_vlan_len_msec, HNS3_TXD_L3LEN_M,
                               HNS3_TXD_L3LEN_S, ol3_len >> 2);

                /* MAC in UDP, MAC in GRE (0x6558)*/
                if ((ol4_proto == IPPROTO_UDP) || (ol4_proto == IPPROTO_GRE)) {
                        /* switch MAC header ptr from outer to inner header.*/
                        l2_hdr = skb_inner_mac_header(skb);

                        /* compute OL4 header size, defined in 4 Bytes. */
                        ol4_len = l2_hdr - l4.hdr;
                        hnae_set_field(*ol_type_vlan_len_msec, HNS3_TXD_L4LEN_M,
                                       HNS3_TXD_L4LEN_S, ol4_len >> 2);

                        /* switch IP header ptr from outer to inner header */
                        l3.hdr = skb_inner_network_header(skb);

                        /* compute inner l2 header size, defined in 2 Bytes. */
                        l2_len = l3.hdr - l2_hdr;
                        hnae_set_field(*type_cs_vlan_tso, HNS3_TXD_L2LEN_M,
                                       HNS3_TXD_L2LEN_S, l2_len >> 1);
                } else {
                        /* skb packet types not supported by hardware,
                         * txbd len fild doesn't be filled.
                         */
                        return;
                }

                /* switch L4 header pointer from outer to inner */
                l4.hdr = skb_inner_transport_header(skb);

                l4_proto = il4_proto;
        }

        /* compute inner(/normal) L3 header size, defined in 4 Bytes */
        l3_len = l4.hdr - l3.hdr;
        hnae_set_field(*type_cs_vlan_tso, HNS3_TXD_L3LEN_M,
                       HNS3_TXD_L3LEN_S, l3_len >> 2);

        /* compute inner(/normal) L4 header size, defined in 4 Bytes */
        switch (l4_proto) {
        case IPPROTO_TCP:
                hnae_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_M,
                               HNS3_TXD_L4LEN_S, l4.tcp->doff);
                break;
        case IPPROTO_SCTP:
                hnae_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_M,
                               HNS3_TXD_L4LEN_S, (sizeof(struct sctphdr) >> 2));
                break;
        case IPPROTO_UDP:
                hnae_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_M,
                               HNS3_TXD_L4LEN_S, (sizeof(struct udphdr) >> 2));
                break;
        default:
                /* skb packet types not supported by hardware,
                 * txbd len fild doesn't be filled.
                 */
                return;
        }
}

static int hns3_set_l3l4_type_csum(struct sk_buff *skb, u8 ol4_proto,
                                   u8 il4_proto, u32 *type_cs_vlan_tso,
                                   u32 *ol_type_vlan_len_msec)
{
        union {
                struct iphdr *v4;
                struct ipv6hdr *v6;
                unsigned char *hdr;
        } l3;
        u32 l4_proto = ol4_proto;

        l3.hdr = skb_network_header(skb);

        /* define OL3 type and tunnel type(OL4).*/
        if (skb->encapsulation) {
                /* define outer network header type.*/
                if (skb->protocol == htons(ETH_P_IP)) {
                        if (skb_is_gso(skb))
                                hnae_set_field(*ol_type_vlan_len_msec,
                                               HNS3_TXD_OL3T_M, HNS3_TXD_OL3T_S,
                                               HNS3_OL3T_IPV4_CSUM);
                        else
                                hnae_set_field(*ol_type_vlan_len_msec,
                                               HNS3_TXD_OL3T_M, HNS3_TXD_OL3T_S,
                                               HNS3_OL3T_IPV4_NO_CSUM);

                } else if (skb->protocol == htons(ETH_P_IPV6)) {
                        hnae_set_field(*ol_type_vlan_len_msec, HNS3_TXD_OL3T_M,
                                       HNS3_TXD_OL3T_S, HNS3_OL3T_IPV6);
                }

                /* define tunnel type(OL4).*/
                switch (l4_proto) {
                case IPPROTO_UDP:
                        hnae_set_field(*ol_type_vlan_len_msec,
                                       HNS3_TXD_TUNTYPE_M,
                                       HNS3_TXD_TUNTYPE_S,
                                       HNS3_TUN_MAC_IN_UDP);
                        break;
                case IPPROTO_GRE:
                        hnae_set_field(*ol_type_vlan_len_msec,
                                       HNS3_TXD_TUNTYPE_M,
                                       HNS3_TXD_TUNTYPE_S,
                                       HNS3_TUN_NVGRE);
                        break;
                default:
                        /* drop the skb tunnel packet if hardware don't support,
                         * because hardware can't calculate csum when TSO.
                         */
                        if (skb_is_gso(skb))
                                return -EDOM;

                        /* the stack computes the IP header already,
                         * driver calculate l4 checksum when not TSO.
                         */
                        skb_checksum_help(skb);
                        return 0;
                }

                l3.hdr = skb_inner_network_header(skb);
                l4_proto = il4_proto;
        }

        if (l3.v4->version == 4) {
                hnae_set_field(*type_cs_vlan_tso, HNS3_TXD_L3T_M,
                               HNS3_TXD_L3T_S, HNS3_L3T_IPV4);

                /* the stack computes the IP header already, the only time we
                 * need the hardware to recompute it is in the case of TSO.
                 */
                if (skb_is_gso(skb))
                        hnae_set_bit(*type_cs_vlan_tso, HNS3_TXD_L3CS_B, 1);

                hnae_set_bit(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
        } else if (l3.v6->version == 6) {
                hnae_set_field(*type_cs_vlan_tso, HNS3_TXD_L3T_M,
                               HNS3_TXD_L3T_S, HNS3_L3T_IPV6);
                hnae_set_bit(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
        }

        switch (l4_proto) {
        case IPPROTO_TCP:
                hnae_set_field(*type_cs_vlan_tso,
                               HNS3_TXD_L4T_M,
                               HNS3_TXD_L4T_S,
                               HNS3_L4T_TCP);
                break;
        case IPPROTO_UDP:
                hnae_set_field(*type_cs_vlan_tso,
                               HNS3_TXD_L4T_M,
                               HNS3_TXD_L4T_S,
                               HNS3_L4T_UDP);
                break;
        case IPPROTO_SCTP:
                hnae_set_field(*type_cs_vlan_tso,
                               HNS3_TXD_L4T_M,
                               HNS3_TXD_L4T_S,
                               HNS3_L4T_SCTP);
                break;
        default:
                /* drop the skb tunnel packet if hardware don't support,
                 * because hardware can't calculate csum when TSO.
                 */
                if (skb_is_gso(skb))
                        return -EDOM;

                /* the stack computes the IP header already,
                 * driver calculate l4 checksum when not TSO.
                 */
                skb_checksum_help(skb);
                return 0;
        }

        return 0;
}

static void hns3_set_txbd_baseinfo(u16 *bdtp_fe_sc_vld_ra_ri, int frag_end)
{
        /* Config bd buffer end */
        hnae_set_field(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_BDTYPE_M,
                       HNS3_TXD_BDTYPE_M, 0);
        hnae_set_bit(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_FE_B, !!frag_end);
        hnae_set_bit(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_VLD_B, 1);
        hnae_set_field(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_SC_M, HNS3_TXD_SC_S, 1);
}

static int hns3_fill_desc(struct hns3_enet_ring *ring, void *priv,
                          int size, dma_addr_t dma, int frag_end,
                          enum hns_desc_type type)
{
        struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
        struct hns3_desc *desc = &ring->desc[ring->next_to_use];
        u32 ol_type_vlan_len_msec = 0;
        u16 bdtp_fe_sc_vld_ra_ri = 0;
        u32 type_cs_vlan_tso = 0;
        struct sk_buff *skb;
        u32 paylen = 0;
        u16 mss = 0;
        __be16 protocol;
        u8 ol4_proto;
        u8 il4_proto;
        int ret;

        /* The txbd's baseinfo of DESC_TYPE_PAGE & DESC_TYPE_SKB */
        desc_cb->priv = priv;
        desc_cb->length = size;
        desc_cb->dma = dma;
        desc_cb->type = type;

        /* now, fill the descriptor */
        desc->addr = cpu_to_le64(dma);
        desc->tx.send_size = cpu_to_le16((u16)size);
        hns3_set_txbd_baseinfo(&bdtp_fe_sc_vld_ra_ri, frag_end);
        desc->tx.bdtp_fe_sc_vld_ra_ri = cpu_to_le16(bdtp_fe_sc_vld_ra_ri);

        if (type == DESC_TYPE_SKB) {
                skb = (struct sk_buff *)priv;
                paylen = cpu_to_le16(skb->len);

                if (skb->ip_summed == CHECKSUM_PARTIAL) {
                        skb_reset_mac_len(skb);
                        protocol = skb->protocol;

                        /* vlan packet*/
                        if (protocol == htons(ETH_P_8021Q)) {
                                protocol = vlan_get_protocol(skb);
                                skb->protocol = protocol;
                        }
                        ret = hns3_get_l4_protocol(skb, &ol4_proto, &il4_proto);
                        if (ret)
                                return ret;
                        hns3_set_l2l3l4_len(skb, ol4_proto, il4_proto,
                                            &type_cs_vlan_tso,
                                            &ol_type_vlan_len_msec);
                        ret = hns3_set_l3l4_type_csum(skb, ol4_proto, il4_proto,
                                                      &type_cs_vlan_tso,
                                                      &ol_type_vlan_len_msec);
                        if (ret)
                                return ret;

                        ret = hns3_set_tso(skb, &paylen, &mss,
                                           &type_cs_vlan_tso);
                        if (ret)
                                return ret;
                }

                /* Set txbd */
                desc->tx.ol_type_vlan_len_msec =
                        cpu_to_le32(ol_type_vlan_len_msec);
                desc->tx.type_cs_vlan_tso_len =
                        cpu_to_le32(type_cs_vlan_tso);
                desc->tx.paylen = cpu_to_le16(paylen);
                desc->tx.mss = cpu_to_le16(mss);
        }

        /* move ring pointer to next.*/
        ring_ptr_move_fw(ring, next_to_use);

        return 0;
}

static int hns3_fill_desc_tso(struct hns3_enet_ring *ring, void *priv,
                              int size, dma_addr_t dma, int frag_end,
                              enum hns_desc_type type)
{
        unsigned int frag_buf_num;
        unsigned int k;
        int sizeoflast;
        int ret;

        frag_buf_num = (size + HNS3_MAX_BD_SIZE - 1) / HNS3_MAX_BD_SIZE;
        sizeoflast = size % HNS3_MAX_BD_SIZE;
        sizeoflast = sizeoflast ? sizeoflast : HNS3_MAX_BD_SIZE;

        /* When the frag size is bigger than hardware, split this frag */
        for (k = 0; k < frag_buf_num; k++) {
                ret = hns3_fill_desc(ring, priv,
                                     (k == frag_buf_num - 1) ?
                                sizeoflast : HNS3_MAX_BD_SIZE,
                                dma + HNS3_MAX_BD_SIZE * k,
                                frag_end && (k == frag_buf_num - 1) ? 1 : 0,
                                (type == DESC_TYPE_SKB && !k) ?
                                        DESC_TYPE_SKB : DESC_TYPE_PAGE);
                if (ret)
                        return ret;
        }

        return 0;
}

static int hns3_nic_maybe_stop_tso(struct sk_buff **out_skb, int *bnum,
                                   struct hns3_enet_ring *ring)
{
        struct sk_buff *skb = *out_skb;
        struct skb_frag_struct *frag;
        int bdnum_for_frag;
        int frag_num;
        int buf_num;
        int size;
        int i;

        size = skb_headlen(skb);
        buf_num = (size + HNS3_MAX_BD_SIZE - 1) / HNS3_MAX_BD_SIZE;

        frag_num = skb_shinfo(skb)->nr_frags;
        for (i = 0; i < frag_num; i++) {
                frag = &skb_shinfo(skb)->frags[i];
                size = skb_frag_size(frag);
                bdnum_for_frag =
                        (size + HNS3_MAX_BD_SIZE - 1) / HNS3_MAX_BD_SIZE;
                if (bdnum_for_frag > HNS3_MAX_BD_PER_FRAG)
                        return -ENOMEM;

                buf_num += bdnum_for_frag;
        }

        if (buf_num > ring_space(ring))
                return -EBUSY;

        *bnum = buf_num;
        return 0;
}

static int hns3_nic_maybe_stop_tx(struct sk_buff **out_skb, int *bnum,
                                  struct hns3_enet_ring *ring)
{
        struct sk_buff *skb = *out_skb;
        int buf_num;

        /* No. of segments (plus a header) */
        buf_num = skb_shinfo(skb)->nr_frags + 1;

        if (buf_num > ring_space(ring))
                return -EBUSY;

        *bnum = buf_num;

        return 0;
}

static void hns_nic_dma_unmap(struct hns3_enet_ring *ring, int next_to_use_orig)
{
        struct device *dev = ring_to_dev(ring);
        unsigned int i;

        for (i = 0; i < ring->desc_num; i++) {
                /* check if this is where we started */
                if (ring->next_to_use == next_to_use_orig)
                        break;

                /* unmap the descriptor dma address */
                if (ring->desc_cb[ring->next_to_use].type == DESC_TYPE_SKB)
                        dma_unmap_single(dev,
                                         ring->desc_cb[ring->next_to_use].dma,
                                        ring->desc_cb[ring->next_to_use].length,
                                        DMA_TO_DEVICE);
                else
                        dma_unmap_page(dev,
                                       ring->desc_cb[ring->next_to_use].dma,
                                       ring->desc_cb[ring->next_to_use].length,
                                       DMA_TO_DEVICE);

                /* rollback one */
                ring_ptr_move_bw(ring, next_to_use);
        }
}

static netdev_tx_t hns3_nic_net_xmit(struct sk_buff *skb,
                                     struct net_device *netdev)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        struct hns3_nic_ring_data *ring_data =
                &tx_ring_data(priv, skb->queue_mapping);
        struct hns3_enet_ring *ring = ring_data->ring;
        struct device *dev = priv->dev;
        struct netdev_queue *dev_queue;
        struct skb_frag_struct *frag;
        int next_to_use_head;
        int next_to_use_frag;
        dma_addr_t dma;
        int buf_num;
        int seg_num;
        int size;
        int ret;
        int i;

        /* Prefetch the data used later */
        prefetch(skb->data);

        switch (priv->ops.maybe_stop_tx(&skb, &buf_num, ring)) {
        case -EBUSY:
                u64_stats_update_begin(&ring->syncp);
                ring->stats.tx_busy++;
                u64_stats_update_end(&ring->syncp);

                goto out_net_tx_busy;
        case -ENOMEM:
                u64_stats_update_begin(&ring->syncp);
                ring->stats.sw_err_cnt++;
                u64_stats_update_end(&ring->syncp);
                netdev_err(netdev, "no memory to xmit!\n");

                goto out_err_tx_ok;
        default:
                break;
        }

        /* No. of segments (plus a header) */
        seg_num = skb_shinfo(skb)->nr_frags + 1;
        /* Fill the first part */
        size = skb_headlen(skb);

        next_to_use_head = ring->next_to_use;

        dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
        if (dma_mapping_error(dev, dma)) {
                netdev_err(netdev, "TX head DMA map failed\n");
                ring->stats.sw_err_cnt++;
                goto out_err_tx_ok;
        }

        ret = priv->ops.fill_desc(ring, skb, size, dma, seg_num == 1 ? 1 : 0,
                           DESC_TYPE_SKB);
        if (ret)
                goto head_dma_map_err;

        next_to_use_frag = ring->next_to_use;
        /* Fill the fragments */
        for (i = 1; i < seg_num; i++) {
                frag = &skb_shinfo(skb)->frags[i - 1];
                size = skb_frag_size(frag);
                dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
                if (dma_mapping_error(dev, dma)) {
                        netdev_err(netdev, "TX frag(%d) DMA map failed\n", i);
                        ring->stats.sw_err_cnt++;
                        goto frag_dma_map_err;
                }
                ret = priv->ops.fill_desc(ring, skb_frag_page(frag), size, dma,
                                    seg_num - 1 == i ? 1 : 0,
                                    DESC_TYPE_PAGE);

                if (ret)
                        goto frag_dma_map_err;
        }

        /* Complete translate all packets */
        dev_queue = netdev_get_tx_queue(netdev, ring_data->queue_index);
        netdev_tx_sent_queue(dev_queue, skb->len);

        wmb(); /* Commit all data before submit */

        hnae_queue_xmit(ring->tqp, buf_num);

        return NETDEV_TX_OK;

frag_dma_map_err:
        hns_nic_dma_unmap(ring, next_to_use_frag);

head_dma_map_err:
        hns_nic_dma_unmap(ring, next_to_use_head);

out_err_tx_ok:
        dev_kfree_skb_any(skb);
        return NETDEV_TX_OK;

out_net_tx_busy:
        netif_stop_subqueue(netdev, ring_data->queue_index);
        smp_mb(); /* Commit all data before submit */

        return NETDEV_TX_BUSY;
}

static int hns3_nic_net_set_mac_address(struct net_device *netdev, void *p)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        struct hnae3_handle *h = priv->ae_handle;
        struct sockaddr *mac_addr = p;
        int ret;

        if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
                return -EADDRNOTAVAIL;

        ret = h->ae_algo->ops->set_mac_addr(h, mac_addr->sa_data);
        if (ret) {
                netdev_err(netdev, "set_mac_address fail, ret=%d!\n", ret);
                return ret;
        }

        ether_addr_copy(netdev->dev_addr, mac_addr->sa_data);

        return 0;
}

static int hns3_nic_set_features(struct net_device *netdev,
                                 netdev_features_t features)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);

        if (features & (NETIF_F_TSO | NETIF_F_TSO6)) {
                priv->ops.fill_desc = hns3_fill_desc_tso;
                priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tso;
        } else {
                priv->ops.fill_desc = hns3_fill_desc;
                priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tx;
        }

        netdev->features = features;
        return 0;
}

static void
hns3_nic_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        int queue_num = priv->ae_handle->kinfo.num_tqps;
        struct hns3_enet_ring *ring;
        unsigned int start;
        unsigned int idx;
        u64 tx_bytes = 0;
        u64 rx_bytes = 0;
        u64 tx_pkts = 0;
        u64 rx_pkts = 0;

        for (idx = 0; idx < queue_num; idx++) {
                /* fetch the tx stats */
                ring = priv->ring_data[idx].ring;
                do {
                        start = u64_stats_fetch_begin_irq(&ring->syncp);
                        tx_bytes += ring->stats.tx_bytes;
                        tx_pkts += ring->stats.tx_pkts;
                } while (u64_stats_fetch_retry_irq(&ring->syncp, start));

                /* fetch the rx stats */
                ring = priv->ring_data[idx + queue_num].ring;
                do {
                        start = u64_stats_fetch_begin_irq(&ring->syncp);
                        rx_bytes += ring->stats.rx_bytes;
                        rx_pkts += ring->stats.rx_pkts;
                } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
        }

        stats->tx_bytes = tx_bytes;
        stats->tx_packets = tx_pkts;
        stats->rx_bytes = rx_bytes;
        stats->rx_packets = rx_pkts;

        stats->rx_errors = netdev->stats.rx_errors;
        stats->multicast = netdev->stats.multicast;
        stats->rx_length_errors = netdev->stats.rx_length_errors;
        stats->rx_crc_errors = netdev->stats.rx_crc_errors;
        stats->rx_missed_errors = netdev->stats.rx_missed_errors;

        stats->tx_errors = netdev->stats.tx_errors;
        stats->rx_dropped = netdev->stats.rx_dropped;
        stats->tx_dropped = netdev->stats.tx_dropped;
        stats->collisions = netdev->stats.collisions;
        stats->rx_over_errors = netdev->stats.rx_over_errors;
        stats->rx_frame_errors = netdev->stats.rx_frame_errors;
        stats->rx_fifo_errors = netdev->stats.rx_fifo_errors;
        stats->tx_aborted_errors = netdev->stats.tx_aborted_errors;
        stats->tx_carrier_errors = netdev->stats.tx_carrier_errors;
        stats->tx_fifo_errors = netdev->stats.tx_fifo_errors;
        stats->tx_heartbeat_errors = netdev->stats.tx_heartbeat_errors;
        stats->tx_window_errors = netdev->stats.tx_window_errors;
        stats->rx_compressed = netdev->stats.rx_compressed;
        stats->tx_compressed = netdev->stats.tx_compressed;
}

static void hns3_add_tunnel_port(struct net_device *netdev, u16 port,
                                 enum hns3_udp_tnl_type type)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        struct hns3_udp_tunnel *udp_tnl = &priv->udp_tnl[type];
        struct hnae3_handle *h = priv->ae_handle;

        if (udp_tnl->used && udp_tnl->dst_port == port) {
                udp_tnl->used++;
                return;
        }

        if (udp_tnl->used) {
                netdev_warn(netdev,
                            "UDP tunnel [%d], port [%d] offload\n", type, port);
                return;
        }

        udp_tnl->dst_port = port;
        udp_tnl->used = 1;
        /* TBD send command to hardware to add port */
        if (h->ae_algo->ops->add_tunnel_udp)
                h->ae_algo->ops->add_tunnel_udp(h, port);
}

static void hns3_del_tunnel_port(struct net_device *netdev, u16 port,
                                 enum hns3_udp_tnl_type type)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        struct hns3_udp_tunnel *udp_tnl = &priv->udp_tnl[type];
        struct hnae3_handle *h = priv->ae_handle;

        if (!udp_tnl->used || udp_tnl->dst_port != port) {
                netdev_warn(netdev,
                            "Invalid UDP tunnel port %d\n", port);
                return;
        }

        udp_tnl->used--;
        if (udp_tnl->used)
                return;

        udp_tnl->dst_port = 0;
        /* TBD send command to hardware to del port  */
        if (h->ae_algo->ops->del_tunnel_udp)
                h->ae_algo->ops->del_tunnel_udp(h, port);
}

/* hns3_nic_udp_tunnel_add - Get notifiacetion about UDP tunnel ports
 * @netdev: This physical ports's netdev
 * @ti: Tunnel information
 */
static void hns3_nic_udp_tunnel_add(struct net_device *netdev,
                                    struct udp_tunnel_info *ti)
{
        u16 port_n = ntohs(ti->port);

        switch (ti->type) {
        case UDP_TUNNEL_TYPE_VXLAN:
                hns3_add_tunnel_port(netdev, port_n, HNS3_UDP_TNL_VXLAN);
                break;
        case UDP_TUNNEL_TYPE_GENEVE:
                hns3_add_tunnel_port(netdev, port_n, HNS3_UDP_TNL_GENEVE);
                break;
        default:
                netdev_err(netdev, "unsupported tunnel type %d\n", ti->type);
                break;
        }
}

static void hns3_nic_udp_tunnel_del(struct net_device *netdev,
                                    struct udp_tunnel_info *ti)
{
        u16 port_n = ntohs(ti->port);

        switch (ti->type) {
        case UDP_TUNNEL_TYPE_VXLAN:
                hns3_del_tunnel_port(netdev, port_n, HNS3_UDP_TNL_VXLAN);
                break;
        case UDP_TUNNEL_TYPE_GENEVE:
                hns3_del_tunnel_port(netdev, port_n, HNS3_UDP_TNL_GENEVE);
                break;
        default:
                break;
        }
}

static int hns3_setup_tc(struct net_device *netdev, u8 tc)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        struct hnae3_handle *h = priv->ae_handle;
        struct hnae3_knic_private_info *kinfo = &h->kinfo;
        unsigned int i;
        int ret;

        if (tc > HNAE3_MAX_TC)
                return -EINVAL;

        if (kinfo->num_tc == tc)
                return 0;

        if (!netdev)
                return -EINVAL;

        if (!tc) {
                netdev_reset_tc(netdev);
                return 0;
        }

        /* Set num_tc for netdev */
        ret = netdev_set_num_tc(netdev, tc);
        if (ret)
                return ret;

        /* Set per TC queues for the VSI */
        for (i = 0; i < HNAE3_MAX_TC; i++) {
                if (kinfo->tc_info[i].enable)
                        netdev_set_tc_queue(netdev,
                                            kinfo->tc_info[i].tc,
                                            kinfo->tc_info[i].tqp_count,
                                            kinfo->tc_info[i].tqp_offset);
        }

        return 0;
}

static int hns3_nic_setup_tc(struct net_device *dev, enum tc_setup_type type,
                             void *type_data)
{
        struct tc_mqprio_qopt *mqprio = type_data;

        if (type != TC_SETUP_MQPRIO)
                return -EOPNOTSUPP;

        return hns3_setup_tc(dev, mqprio->num_tc);
}

static int hns3_vlan_rx_add_vid(struct net_device *netdev,
                                __be16 proto, u16 vid)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        struct hnae3_handle *h = priv->ae_handle;
        int ret = -EIO;

        if (h->ae_algo->ops->set_vlan_filter)
                ret = h->ae_algo->ops->set_vlan_filter(h, proto, vid, false);

        return ret;
}

static int hns3_vlan_rx_kill_vid(struct net_device *netdev,
                                 __be16 proto, u16 vid)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        struct hnae3_handle *h = priv->ae_handle;
        int ret = -EIO;

        if (h->ae_algo->ops->set_vlan_filter)
                ret = h->ae_algo->ops->set_vlan_filter(h, proto, vid, true);

        return ret;
}

static int hns3_ndo_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan,
                                u8 qos, __be16 vlan_proto)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        struct hnae3_handle *h = priv->ae_handle;
        int ret = -EIO;

        if (h->ae_algo->ops->set_vf_vlan_filter)
                ret = h->ae_algo->ops->set_vf_vlan_filter(h, vf, vlan,
                                                   qos, vlan_proto);

        return ret;
}

static int hns3_nic_change_mtu(struct net_device *netdev, int new_mtu)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        struct hnae3_handle *h = priv->ae_handle;
        bool if_running = netif_running(netdev);
        int ret;

        if (!h->ae_algo->ops->set_mtu)
                return -EOPNOTSUPP;

        /* if this was called with netdev up then bring netdevice down */
        if (if_running) {
                (void)hns3_nic_net_stop(netdev);
                msleep(100);
        }

        ret = h->ae_algo->ops->set_mtu(h, new_mtu);
        if (ret) {
                netdev_err(netdev, "failed to change MTU in hardware %d\n",
                           ret);
                return ret;
        }

        /* if the netdev was running earlier, bring it up again */
        if (if_running && hns3_nic_net_open(netdev))
                ret = -EINVAL;

        return ret;
}

static const struct net_device_ops hns3_nic_netdev_ops = {
        .ndo_open               = hns3_nic_net_open,
        .ndo_stop               = hns3_nic_net_stop,
        .ndo_start_xmit         = hns3_nic_net_xmit,
        .ndo_set_mac_address    = hns3_nic_net_set_mac_address,
        .ndo_change_mtu         = hns3_nic_change_mtu,
        .ndo_set_features       = hns3_nic_set_features,
        .ndo_get_stats64        = hns3_nic_get_stats64,
        .ndo_setup_tc           = hns3_nic_setup_tc,
        .ndo_set_rx_mode        = hns3_nic_set_rx_mode,
        .ndo_udp_tunnel_add     = hns3_nic_udp_tunnel_add,
        .ndo_udp_tunnel_del     = hns3_nic_udp_tunnel_del,
        .ndo_vlan_rx_add_vid    = hns3_vlan_rx_add_vid,
        .ndo_vlan_rx_kill_vid   = hns3_vlan_rx_kill_vid,
        .ndo_set_vf_vlan        = hns3_ndo_set_vf_vlan,
};

/* hns3_probe - Device initialization routine
 * @pdev: PCI device information struct
 * @ent: entry in hns3_pci_tbl
 *
 * hns3_probe initializes a PF identified by a pci_dev structure.
 * The OS initialization, configuring of the PF private structure,
 * and a hardware reset occur.
 *
 * Returns 0 on success, negative on failure
 */
static int hns3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
        struct hnae3_ae_dev *ae_dev;
        int ret;

        ae_dev = devm_kzalloc(&pdev->dev, sizeof(*ae_dev),
                              GFP_KERNEL);
        if (!ae_dev) {
                ret = -ENOMEM;
                return ret;
        }

        ae_dev->pdev = pdev;
        ae_dev->flag = ent->driver_data;
        ae_dev->dev_type = HNAE3_DEV_KNIC;
        pci_set_drvdata(pdev, ae_dev);

        return hnae3_register_ae_dev(ae_dev);
}

/* hns3_remove - Device removal routine
 * @pdev: PCI device information struct
 */
static void hns3_remove(struct pci_dev *pdev)
{
        struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);

        hnae3_unregister_ae_dev(ae_dev);

        devm_kfree(&pdev->dev, ae_dev);

        pci_set_drvdata(pdev, NULL);
}

static struct pci_driver hns3_driver = {
        .name     = hns3_driver_name,
        .id_table = hns3_pci_tbl,
        .probe    = hns3_probe,
        .remove   = hns3_remove,
};

/* set default feature to hns3 */
static void hns3_set_default_feature(struct net_device *netdev)
{
        netdev->priv_flags |= IFF_UNICAST_FLT;

        netdev->hw_enc_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
                NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
                NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
                NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
                NETIF_F_GSO_UDP_TUNNEL_CSUM;

        netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;

        netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;

        netdev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
                NETIF_F_HW_VLAN_CTAG_FILTER |
                NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
                NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
                NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
                NETIF_F_GSO_UDP_TUNNEL_CSUM;

        netdev->vlan_features |=
                NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM |
                NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO |
                NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
                NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
                NETIF_F_GSO_UDP_TUNNEL_CSUM;

        netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
                NETIF_F_HW_VLAN_CTAG_FILTER |
                NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
                NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
                NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
                NETIF_F_GSO_UDP_TUNNEL_CSUM;
}

static int hns3_alloc_buffer(struct hns3_enet_ring *ring,
                             struct hns3_desc_cb *cb)
{
        unsigned int order = hnae_page_order(ring);
        struct page *p;

        p = dev_alloc_pages(order);
        if (!p)
                return -ENOMEM;

        cb->priv = p;
        cb->page_offset = 0;
        cb->reuse_flag = 0;
        cb->buf  = page_address(p);
        cb->length = hnae_page_size(ring);
        cb->type = DESC_TYPE_PAGE;

        memset(cb->buf, 0, cb->length);

        return 0;
}

static void hns3_free_buffer(struct hns3_enet_ring *ring,
                             struct hns3_desc_cb *cb)
{
        if (cb->type == DESC_TYPE_SKB)
                dev_kfree_skb_any((struct sk_buff *)cb->priv);
        else if (!HNAE3_IS_TX_RING(ring))
                put_page((struct page *)cb->priv);
        memset(cb, 0, sizeof(*cb));
}

static int hns3_map_buffer(struct hns3_enet_ring *ring, struct hns3_desc_cb *cb)
{
        cb->dma = dma_map_page(ring_to_dev(ring), cb->priv, 0,
                               cb->length, ring_to_dma_dir(ring));

        if (dma_mapping_error(ring_to_dev(ring), cb->dma))
                return -EIO;

        return 0;
}

static void hns3_unmap_buffer(struct hns3_enet_ring *ring,
                              struct hns3_desc_cb *cb)
{
        if (cb->type == DESC_TYPE_SKB)
                dma_unmap_single(ring_to_dev(ring), cb->dma, cb->length,
                                 ring_to_dma_dir(ring));
        else
                dma_unmap_page(ring_to_dev(ring), cb->dma, cb->length,
                               ring_to_dma_dir(ring));
}

static void hns3_buffer_detach(struct hns3_enet_ring *ring, int i)
{
        hns3_unmap_buffer(ring, &ring->desc_cb[i]);
        ring->desc[i].addr = 0;
}

static void hns3_free_buffer_detach(struct hns3_enet_ring *ring, int i)
{
        struct hns3_desc_cb *cb = &ring->desc_cb[i];

        if (!ring->desc_cb[i].dma)
                return;

        hns3_buffer_detach(ring, i);
        hns3_free_buffer(ring, cb);
}

static void hns3_free_buffers(struct hns3_enet_ring *ring)
{
        int i;

        for (i = 0; i < ring->desc_num; i++)
                hns3_free_buffer_detach(ring, i);
}

/* free desc along with its attached buffer */
static void hns3_free_desc(struct hns3_enet_ring *ring)
{
        hns3_free_buffers(ring);

        dma_unmap_single(ring_to_dev(ring), ring->desc_dma_addr,
                         ring->desc_num * sizeof(ring->desc[0]),
                         DMA_BIDIRECTIONAL);
        ring->desc_dma_addr = 0;
        kfree(ring->desc);
        ring->desc = NULL;
}

static int hns3_alloc_desc(struct hns3_enet_ring *ring)
{
        int size = ring->desc_num * sizeof(ring->desc[0]);

        ring->desc = kzalloc(size, GFP_KERNEL);
        if (!ring->desc)
                return -ENOMEM;

        ring->desc_dma_addr = dma_map_single(ring_to_dev(ring), ring->desc,
                                             size, DMA_BIDIRECTIONAL);
        if (dma_mapping_error(ring_to_dev(ring), ring->desc_dma_addr)) {
                ring->desc_dma_addr = 0;
                kfree(ring->desc);
                ring->desc = NULL;
                return -ENOMEM;
        }

        return 0;
}

static int hns3_reserve_buffer_map(struct hns3_enet_ring *ring,
                                   struct hns3_desc_cb *cb)
{
        int ret;

        ret = hns3_alloc_buffer(ring, cb);
        if (ret)
                goto out;

        ret = hns3_map_buffer(ring, cb);
        if (ret)
                goto out_with_buf;

        return 0;

out_with_buf:
        hns3_free_buffers(ring);
out:
        return ret;
}

static int hns3_alloc_buffer_attach(struct hns3_enet_ring *ring, int i)
{
        int ret = hns3_reserve_buffer_map(ring, &ring->desc_cb[i]);

        if (ret)
                return ret;

        ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);

        return 0;
}

/* Allocate memory for raw pkg, and map with dma */
static int hns3_alloc_ring_buffers(struct hns3_enet_ring *ring)
{
        int i, j, ret;

        for (i = 0; i < ring->desc_num; i++) {
                ret = hns3_alloc_buffer_attach(ring, i);
                if (ret)
                        goto out_buffer_fail;
        }

        return 0;

out_buffer_fail:
        for (j = i - 1; j >= 0; j--)
                hns3_free_buffer_detach(ring, j);
        return ret;
}

/* detach a in-used buffer and replace with a reserved one  */
static void hns3_replace_buffer(struct hns3_enet_ring *ring, int i,
                                struct hns3_desc_cb *res_cb)
{
        hns3_map_buffer(ring, &ring->desc_cb[i]);
        ring->desc_cb[i] = *res_cb;
        ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
}

static void hns3_reuse_buffer(struct hns3_enet_ring *ring, int i)
{
        ring->desc_cb[i].reuse_flag = 0;
        ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma
                + ring->desc_cb[i].page_offset);
}

static void hns3_nic_reclaim_one_desc(struct hns3_enet_ring *ring, int *bytes,
                                      int *pkts)
{
        struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];

        (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
        (*bytes) += desc_cb->length;
        /* desc_cb will be cleaned, after hnae_free_buffer_detach*/
        hns3_free_buffer_detach(ring, ring->next_to_clean);

        ring_ptr_move_fw(ring, next_to_clean);
}

static int is_valid_clean_head(struct hns3_enet_ring *ring, int h)
{
        int u = ring->next_to_use;
        int c = ring->next_to_clean;

        if (unlikely(h > ring->desc_num))
                return 0;

        return u > c ? (h > c && h <= u) : (h > c || h <= u);
}

int hns3_clean_tx_ring(struct hns3_enet_ring *ring, int budget)
{
        struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
        struct netdev_queue *dev_queue;
        int bytes, pkts;
        int head;

        head = readl_relaxed(ring->tqp->io_base + HNS3_RING_TX_RING_HEAD_REG);
        rmb(); /* Make sure head is ready before touch any data */

        if (is_ring_empty(ring) || head == ring->next_to_clean)
                return 0; /* no data to poll */

        if (!is_valid_clean_head(ring, head)) {
                netdev_err(netdev, "wrong head (%d, %d-%d)\n", head,
                           ring->next_to_use, ring->next_to_clean);

                u64_stats_update_begin(&ring->syncp);
                ring->stats.io_err_cnt++;
                u64_stats_update_end(&ring->syncp);
                return -EIO;
        }

        bytes = 0;
        pkts = 0;
        while (head != ring->next_to_clean && budget) {
                hns3_nic_reclaim_one_desc(ring, &bytes, &pkts);
                /* Issue prefetch for next Tx descriptor */
                prefetch(&ring->desc_cb[ring->next_to_clean]);
                budget--;
        }

        ring->tqp_vector->tx_group.total_bytes += bytes;
        ring->tqp_vector->tx_group.total_packets += pkts;

        u64_stats_update_begin(&ring->syncp);
        ring->stats.tx_bytes += bytes;
        ring->stats.tx_pkts += pkts;
        u64_stats_update_end(&ring->syncp);

        dev_queue = netdev_get_tx_queue(netdev, ring->tqp->tqp_index);
        netdev_tx_completed_queue(dev_queue, pkts, bytes);

        if (unlikely(pkts && netif_carrier_ok(netdev) &&
                     (ring_space(ring) > HNS3_MAX_BD_PER_PKT))) {
                /* Make sure that anybody stopping the queue after this
                 * sees the new next_to_clean.
                 */
                smp_mb();
                if (netif_tx_queue_stopped(dev_queue)) {
                        netif_tx_wake_queue(dev_queue);
                        ring->stats.restart_queue++;
                }
        }

        return !!budget;
}

static int hns3_desc_unused(struct hns3_enet_ring *ring)
{
        int ntc = ring->next_to_clean;
        int ntu = ring->next_to_use;

        return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
}

static void
hns3_nic_alloc_rx_buffers(struct hns3_enet_ring *ring, int cleand_count)
{
        struct hns3_desc_cb *desc_cb;
        struct hns3_desc_cb res_cbs;
        int i, ret;

        for (i = 0; i < cleand_count; i++) {
                desc_cb = &ring->desc_cb[ring->next_to_use];
                if (desc_cb->reuse_flag) {
                        u64_stats_update_begin(&ring->syncp);
                        ring->stats.reuse_pg_cnt++;
                        u64_stats_update_end(&ring->syncp);

                        hns3_reuse_buffer(ring, ring->next_to_use);
                } else {
                        ret = hns3_reserve_buffer_map(ring, &res_cbs);
                        if (ret) {
                                u64_stats_update_begin(&ring->syncp);
                                ring->stats.sw_err_cnt++;
                                u64_stats_update_end(&ring->syncp);

                                netdev_err(ring->tqp->handle->kinfo.netdev,
                                           "hnae reserve buffer map failed.\n");
                                break;
                        }
                        hns3_replace_buffer(ring, ring->next_to_use, &res_cbs);
                }

                ring_ptr_move_fw(ring, next_to_use);
        }

        wmb(); /* Make all data has been write before submit */
        writel_relaxed(i, ring->tqp->io_base + HNS3_RING_RX_RING_HEAD_REG);
}

/* hns3_nic_get_headlen - determine size of header for LRO/GRO
 * @data: pointer to the start of the headers
 * @max: total length of section to find headers in
 *
 * This function is meant to determine the length of headers that will
 * be recognized by hardware for LRO, GRO, and RSC offloads.  The main
 * motivation of doing this is to only perform one pull for IPv4 TCP
 * packets so that we can do basic things like calculating the gso_size
 * based on the average data per packet.
 */
static unsigned int hns3_nic_get_headlen(unsigned char *data, u32 flag,
                                         unsigned int max_size)
{
        unsigned char *network;
        u8 hlen;

        /* This should never happen, but better safe than sorry */
        if (max_size < ETH_HLEN)
                return max_size;

        /* Initialize network frame pointer */
        network = data;

        /* Set first protocol and move network header forward */
        network += ETH_HLEN;

        /* Handle any vlan tag if present */
        if (hnae_get_field(flag, HNS3_RXD_VLAN_M, HNS3_RXD_VLAN_S)
                == HNS3_RX_FLAG_VLAN_PRESENT) {
                if ((typeof(max_size))(network - data) > (max_size - VLAN_HLEN))
                        return max_size;

                network += VLAN_HLEN;
        }

        /* Handle L3 protocols */
        if (hnae_get_field(flag, HNS3_RXD_L3ID_M, HNS3_RXD_L3ID_S)
                == HNS3_RX_FLAG_L3ID_IPV4) {
                if ((typeof(max_size))(network - data) >
                    (max_size - sizeof(struct iphdr)))
                        return max_size;

                /* Access ihl as a u8 to avoid unaligned access on ia64 */
                hlen = (network[0] & 0x0F) << 2;

                /* Verify hlen meets minimum size requirements */
                if (hlen < sizeof(struct iphdr))
                        return network - data;

                /* Record next protocol if header is present */
        } else if (hnae_get_field(flag, HNS3_RXD_L3ID_M, HNS3_RXD_L3ID_S)
                == HNS3_RX_FLAG_L3ID_IPV6) {
                if ((typeof(max_size))(network - data) >
                    (max_size - sizeof(struct ipv6hdr)))
                        return max_size;

                /* Record next protocol */
                hlen = sizeof(struct ipv6hdr);
        } else {
                return network - data;
        }

        /* Relocate pointer to start of L4 header */
        network += hlen;

        /* Finally sort out TCP/UDP */
        if (hnae_get_field(flag, HNS3_RXD_L4ID_M, HNS3_RXD_L4ID_S)
                == HNS3_RX_FLAG_L4ID_TCP) {
                if ((typeof(max_size))(network - data) >
                    (max_size - sizeof(struct tcphdr)))
                        return max_size;

                /* Access doff as a u8 to avoid unaligned access on ia64 */
                hlen = (network[12] & 0xF0) >> 2;

                /* Verify hlen meets minimum size requirements */
                if (hlen < sizeof(struct tcphdr))
                        return network - data;

                network += hlen;
        } else if (hnae_get_field(flag, HNS3_RXD_L4ID_M, HNS3_RXD_L4ID_S)
                == HNS3_RX_FLAG_L4ID_UDP) {
                if ((typeof(max_size))(network - data) >
                    (max_size - sizeof(struct udphdr)))
                        return max_size;

                network += sizeof(struct udphdr);
        }

        /* If everything has gone correctly network should be the
         * data section of the packet and will be the end of the header.
         * If not then it probably represents the end of the last recognized
         * header.
         */
        if ((typeof(max_size))(network - data) < max_size)
                return network - data;
        else
                return max_size;
}

static void hns3_nic_reuse_page(struct sk_buff *skb, int i,
                                struct hns3_enet_ring *ring, int pull_len,
                                struct hns3_desc_cb *desc_cb)
{
        struct hns3_desc *desc;
        int truesize, size;
        int last_offset;
        bool twobufs;

        twobufs = ((PAGE_SIZE < 8192) &&
                hnae_buf_size(ring) == HNS3_BUFFER_SIZE_2048);

        desc = &ring->desc[ring->next_to_clean];
        size = le16_to_cpu(desc->rx.size);

        if (twobufs) {
                truesize = hnae_buf_size(ring);
        } else {
                truesize = ALIGN(size, L1_CACHE_BYTES);
                last_offset = hnae_page_size(ring) - hnae_buf_size(ring);
        }

        skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
                        size - pull_len, truesize - pull_len);

         /* Avoid re-using remote pages,flag default unreuse */
        if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id()))
                return;

        if (twobufs) {
                /* If we are only owner of page we can reuse it */
                if (likely(page_count(desc_cb->priv) == 1)) {
                        /* Flip page offset to other buffer */
                        desc_cb->page_offset ^= truesize;

                        desc_cb->reuse_flag = 1;
                        /* bump ref count on page before it is given*/
                        get_page(desc_cb->priv);
                }
                return;
        }

        /* Move offset up to the next cache line */
        desc_cb->page_offset += truesize;

        if (desc_cb->page_offset <= last_offset) {
                desc_cb->reuse_flag = 1;
                /* Bump ref count on page before it is given*/
                get_page(desc_cb->priv);
        }
}

static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb,
                             struct hns3_desc *desc)
{
        struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
        int l3_type, l4_type;
        u32 bd_base_info;
        int ol4_type;
        u32 l234info;

        bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
        l234info = le32_to_cpu(desc->rx.l234_info);

        skb->ip_summed = CHECKSUM_NONE;

        skb_checksum_none_assert(skb);

        if (!(netdev->features & NETIF_F_RXCSUM))
                return;

        /* check if hardware has done checksum */
        if (!hnae_get_bit(bd_base_info, HNS3_RXD_L3L4P_B))
                return;

        if (unlikely(hnae_get_bit(l234info, HNS3_RXD_L3E_B) ||
                     hnae_get_bit(l234info, HNS3_RXD_L4E_B) ||
                     hnae_get_bit(l234info, HNS3_RXD_OL3E_B) ||
                     hnae_get_bit(l234info, HNS3_RXD_OL4E_B))) {
                netdev_err(netdev, "L3/L4 error pkt\n");
                u64_stats_update_begin(&ring->syncp);
                ring->stats.l3l4_csum_err++;
                u64_stats_update_end(&ring->syncp);

                return;
        }

        l3_type = hnae_get_field(l234info, HNS3_RXD_L3ID_M,
                                 HNS3_RXD_L3ID_S);
        l4_type = hnae_get_field(l234info, HNS3_RXD_L4ID_M,
                                 HNS3_RXD_L4ID_S);

        ol4_type = hnae_get_field(l234info, HNS3_RXD_OL4ID_M, HNS3_RXD_OL4ID_S);
        switch (ol4_type) {
        case HNS3_OL4_TYPE_MAC_IN_UDP:
        case HNS3_OL4_TYPE_NVGRE:
                skb->csum_level = 1;
        case HNS3_OL4_TYPE_NO_TUN:
                /* Can checksum ipv4 or ipv6 + UDP/TCP/SCTP packets */
                if (l3_type == HNS3_L3_TYPE_IPV4 ||
                    (l3_type == HNS3_L3_TYPE_IPV6 &&
                     (l4_type == HNS3_L4_TYPE_UDP ||
                      l4_type == HNS3_L4_TYPE_TCP ||
                      l4_type == HNS3_L4_TYPE_SCTP)))
                        skb->ip_summed = CHECKSUM_UNNECESSARY;
                break;
        }
}

static int hns3_handle_rx_bd(struct hns3_enet_ring *ring,
                             struct sk_buff **out_skb, int *out_bnum)
{
        struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
        struct hns3_desc_cb *desc_cb;
        struct hns3_desc *desc;
        struct sk_buff *skb;
        unsigned char *va;
        u32 bd_base_info;
        int pull_len;
        u32 l234info;
        int length;
        int bnum;

        desc = &ring->desc[ring->next_to_clean];
        desc_cb = &ring->desc_cb[ring->next_to_clean];

        prefetch(desc);

        length = le16_to_cpu(desc->rx.pkt_len);
        bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
        l234info = le32_to_cpu(desc->rx.l234_info);

        /* Check valid BD */
        if (!hnae_get_bit(bd_base_info, HNS3_RXD_VLD_B))
                return -EFAULT;

        va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;

        /* Prefetch first cache line of first page
         * Idea is to cache few bytes of the header of the packet. Our L1 Cache
         * line size is 64B so need to prefetch twice to make it 128B. But in
         * actual we can have greater size of caches with 128B Level 1 cache
         * lines. In such a case, single fetch would suffice to cache in the
         * relevant part of the header.
         */
        prefetch(va);
#if L1_CACHE_BYTES < 128
        prefetch(va + L1_CACHE_BYTES);
#endif

        skb = *out_skb = napi_alloc_skb(&ring->tqp_vector->napi,
                                        HNS3_RX_HEAD_SIZE);
        if (unlikely(!skb)) {
                netdev_err(netdev, "alloc rx skb fail\n");

                u64_stats_update_begin(&ring->syncp);
                ring->stats.sw_err_cnt++;
                u64_stats_update_end(&ring->syncp);

                return -ENOMEM;
        }

        prefetchw(skb->data);

        bnum = 1;
        if (length <= HNS3_RX_HEAD_SIZE) {
                memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));

                /* We can reuse buffer as-is, just make sure it is local */
                if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
                        desc_cb->reuse_flag = 1;
                else /* This page cannot be reused so discard it */
                        put_page(desc_cb->priv);

                ring_ptr_move_fw(ring, next_to_clean);
        } else {
                u64_stats_update_begin(&ring->syncp);
                ring->stats.seg_pkt_cnt++;
                u64_stats_update_end(&ring->syncp);

                pull_len = hns3_nic_get_headlen(va, l234info,
                                                HNS3_RX_HEAD_SIZE);
                memcpy(__skb_put(skb, pull_len), va,
                       ALIGN(pull_len, sizeof(long)));

                hns3_nic_reuse_page(skb, 0, ring, pull_len, desc_cb);
                ring_ptr_move_fw(ring, next_to_clean);

                while (!hnae_get_bit(bd_base_info, HNS3_RXD_FE_B)) {
                        desc = &ring->desc[ring->next_to_clean];
                        desc_cb = &ring->desc_cb[ring->next_to_clean];
                        bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
                        hns3_nic_reuse_page(skb, bnum, ring, 0, desc_cb);
                        ring_ptr_move_fw(ring, next_to_clean);
                        bnum++;
                }
        }

        *out_bnum = bnum;

        if (unlikely(!hnae_get_bit(bd_base_info, HNS3_RXD_VLD_B))) {
                netdev_err(netdev, "no valid bd,%016llx,%016llx\n",
                           ((u64 *)desc)[0], ((u64 *)desc)[1]);
                u64_stats_update_begin(&ring->syncp);
                ring->stats.non_vld_descs++;
                u64_stats_update_end(&ring->syncp);

                dev_kfree_skb_any(skb);
                return -EINVAL;
        }

        if (unlikely((!desc->rx.pkt_len) ||
                     hnae_get_bit(l234info, HNS3_RXD_TRUNCAT_B))) {
                netdev_err(netdev, "truncated pkt\n");
                u64_stats_update_begin(&ring->syncp);
                ring->stats.err_pkt_len++;
                u64_stats_update_end(&ring->syncp);

                dev_kfree_skb_any(skb);
                return -EFAULT;
        }

        if (unlikely(hnae_get_bit(l234info, HNS3_RXD_L2E_B))) {
                netdev_err(netdev, "L2 error pkt\n");
                u64_stats_update_begin(&ring->syncp);
                ring->stats.l2_err++;
                u64_stats_update_end(&ring->syncp);

                dev_kfree_skb_any(skb);
                return -EFAULT;
        }

        u64_stats_update_begin(&ring->syncp);
        ring->stats.rx_pkts++;
        ring->stats.rx_bytes += skb->len;
        u64_stats_update_end(&ring->syncp);

        ring->tqp_vector->rx_group.total_bytes += skb->len;

        hns3_rx_checksum(ring, skb, desc);
        return 0;
}

static int hns3_clean_rx_ring(struct hns3_enet_ring *ring, int budget)
{
#define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
        struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
        int recv_pkts, recv_bds, clean_count, err;
        int unused_count = hns3_desc_unused(ring);
        struct sk_buff *skb = NULL;
        int num, bnum = 0;

        num = readl_relaxed(ring->tqp->io_base + HNS3_RING_RX_RING_FBDNUM_REG);
        rmb(); /* Make sure num taken effect before the other data is touched */

        recv_pkts = 0, recv_bds = 0, clean_count = 0;
        num -= unused_count;

        while (recv_pkts < budget && recv_bds < num) {
                /* Reuse or realloc buffers */
                if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
                        hns3_nic_alloc_rx_buffers(ring,
                                                  clean_count + unused_count);
                        clean_count = 0;
                        unused_count = hns3_desc_unused(ring);
                }

                /* Poll one pkt */
                err = hns3_handle_rx_bd(ring, &skb, &bnum);
                if (unlikely(!skb)) /* This fault cannot be repaired */
                        goto out;

                recv_bds += bnum;
                clean_count += bnum;
                if (unlikely(err)) {  /* Do jump the err */
                        recv_pkts++;
                        continue;
                }

                /* Do update ip stack process */
                skb->protocol = eth_type_trans(skb, netdev);
                (void)napi_gro_receive(&ring->tqp_vector->napi, skb);

                recv_pkts++;
        }

out:
        /* Make all data has been write before submit */
        if (clean_count + unused_count > 0)
                hns3_nic_alloc_rx_buffers(ring,
                                          clean_count + unused_count);

        return recv_pkts;
}

static bool hns3_get_new_int_gl(struct hns3_enet_ring_group *ring_group)
{
#define HNS3_RX_ULTRA_PACKET_RATE 40000
        enum hns3_flow_level_range new_flow_level;
        struct hns3_enet_tqp_vector *tqp_vector;
        int packets_per_secs;
        int bytes_per_usecs;
        u16 new_int_gl;
        int usecs;

        if (!ring_group->int_gl)
                return false;

        if (ring_group->total_packets == 0) {
                ring_group->int_gl = HNS3_INT_GL_50K;
                ring_group->flow_level = HNS3_FLOW_LOW;
                return true;
        }

        /* Simple throttlerate management
         * 0-10MB/s   lower     (50000 ints/s)
         * 10-20MB/s   middle    (20000 ints/s)
         * 20-1249MB/s high      (18000 ints/s)
         * > 40000pps  ultra     (8000 ints/s)
         */
        new_flow_level = ring_group->flow_level;
        new_int_gl = ring_group->int_gl;
        tqp_vector = ring_group->ring->tqp_vector;
        usecs = (ring_group->int_gl << 1);
        bytes_per_usecs = ring_group->total_bytes / usecs;
        /* 1000000 microseconds */
        packets_per_secs = ring_group->total_packets * 1000000 / usecs;

        switch (new_flow_level) {
        case HNS3_FLOW_LOW:
                if (bytes_per_usecs > 10)
                        new_flow_level = HNS3_FLOW_MID;
                break;
        case HNS3_FLOW_MID:
                if (bytes_per_usecs > 20)
                        new_flow_level = HNS3_FLOW_HIGH;
                else if (bytes_per_usecs <= 10)
                        new_flow_level = HNS3_FLOW_LOW;
                break;
        case HNS3_FLOW_HIGH:
        case HNS3_FLOW_ULTRA:
        default:
                if (bytes_per_usecs <= 20)
                        new_flow_level = HNS3_FLOW_MID;
                break;
        }

        if ((packets_per_secs > HNS3_RX_ULTRA_PACKET_RATE) &&
            (&tqp_vector->rx_group == ring_group))
                new_flow_level = HNS3_FLOW_ULTRA;

        switch (new_flow_level) {
        case HNS3_FLOW_LOW:
                new_int_gl = HNS3_INT_GL_50K;
                break;
        case HNS3_FLOW_MID:
                new_int_gl = HNS3_INT_GL_20K;
                break;
        case HNS3_FLOW_HIGH:
                new_int_gl = HNS3_INT_GL_18K;
                break;
        case HNS3_FLOW_ULTRA:
                new_int_gl = HNS3_INT_GL_8K;
                break;
        default:
                break;
        }

        ring_group->total_bytes = 0;
        ring_group->total_packets = 0;
        ring_group->flow_level = new_flow_level;
        if (new_int_gl != ring_group->int_gl) {
                ring_group->int_gl = new_int_gl;
                return true;
        }
        return false;
}

static void hns3_update_new_int_gl(struct hns3_enet_tqp_vector *tqp_vector)
{
        u16 rx_int_gl, tx_int_gl;
        bool rx, tx;

        rx = hns3_get_new_int_gl(&tqp_vector->rx_group);
        tx = hns3_get_new_int_gl(&tqp_vector->tx_group);
        rx_int_gl = tqp_vector->rx_group.int_gl;
        tx_int_gl = tqp_vector->tx_group.int_gl;
        if (rx && tx) {
                if (rx_int_gl > tx_int_gl) {
                        tqp_vector->tx_group.int_gl = rx_int_gl;
                        tqp_vector->tx_group.flow_level =
                                tqp_vector->rx_group.flow_level;
                        hns3_set_vector_coalesc_gl(tqp_vector, rx_int_gl);
                } else {
                        tqp_vector->rx_group.int_gl = tx_int_gl;
                        tqp_vector->rx_group.flow_level =
                                tqp_vector->tx_group.flow_level;
                        hns3_set_vector_coalesc_gl(tqp_vector, tx_int_gl);
                }
        }
}

static int hns3_nic_common_poll(struct napi_struct *napi, int budget)
{
        struct hns3_enet_ring *ring;
        int rx_pkt_total = 0;

        struct hns3_enet_tqp_vector *tqp_vector =
                container_of(napi, struct hns3_enet_tqp_vector, napi);
        bool clean_complete = true;
        int rx_budget;

        /* Since the actual Tx work is minimal, we can give the Tx a larger
         * budget and be more aggressive about cleaning up the Tx descriptors.
         */
        hns3_for_each_ring(ring, tqp_vector->tx_group) {
                if (!hns3_clean_tx_ring(ring, budget))
                        clean_complete = false;
        }

        /* make sure rx ring budget not smaller than 1 */
        rx_budget = max(budget / tqp_vector->num_tqps, 1);

        hns3_for_each_ring(ring, tqp_vector->rx_group) {
                int rx_cleaned = hns3_clean_rx_ring(ring, rx_budget);

                if (rx_cleaned >= rx_budget)
                        clean_complete = false;

                rx_pkt_total += rx_cleaned;
        }

        tqp_vector->rx_group.total_packets += rx_pkt_total;

        if (!clean_complete)
                return budget;

        napi_complete(napi);
        hns3_update_new_int_gl(tqp_vector);
        hns3_mask_vector_irq(tqp_vector, 1);

        return rx_pkt_total;
}

static int hns3_get_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
                                      struct hnae3_ring_chain_node *head)
{
        struct pci_dev *pdev = tqp_vector->handle->pdev;
        struct hnae3_ring_chain_node *cur_chain = head;
        struct hnae3_ring_chain_node *chain;
        struct hns3_enet_ring *tx_ring;
        struct hns3_enet_ring *rx_ring;

        tx_ring = tqp_vector->tx_group.ring;
        if (tx_ring) {
                cur_chain->tqp_index = tx_ring->tqp->tqp_index;
                hnae_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
                             HNAE3_RING_TYPE_TX);

                cur_chain->next = NULL;

                while (tx_ring->next) {
                        tx_ring = tx_ring->next;

                        chain = devm_kzalloc(&pdev->dev, sizeof(*chain),
                                             GFP_KERNEL);
                        if (!chain)
                                return -ENOMEM;

                        cur_chain->next = chain;
                        chain->tqp_index = tx_ring->tqp->tqp_index;
                        hnae_set_bit(chain->flag, HNAE3_RING_TYPE_B,
                                     HNAE3_RING_TYPE_TX);

                        cur_chain = chain;
                }
        }

        rx_ring = tqp_vector->rx_group.ring;
        if (!tx_ring && rx_ring) {
                cur_chain->next = NULL;
                cur_chain->tqp_index = rx_ring->tqp->tqp_index;
                hnae_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
                             HNAE3_RING_TYPE_RX);

                rx_ring = rx_ring->next;
        }

        while (rx_ring) {
                chain = devm_kzalloc(&pdev->dev, sizeof(*chain), GFP_KERNEL);
                if (!chain)
                        return -ENOMEM;

                cur_chain->next = chain;
                chain->tqp_index = rx_ring->tqp->tqp_index;
                hnae_set_bit(chain->flag, HNAE3_RING_TYPE_B,
                             HNAE3_RING_TYPE_RX);
                cur_chain = chain;

                rx_ring = rx_ring->next;
        }

        return 0;
}

static void hns3_free_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
                                        struct hnae3_ring_chain_node *head)
{
        struct pci_dev *pdev = tqp_vector->handle->pdev;
        struct hnae3_ring_chain_node *chain_tmp, *chain;

        chain = head->next;

        while (chain) {
                chain_tmp = chain->next;
                devm_kfree(&pdev->dev, chain);
                chain = chain_tmp;
        }
}

static void hns3_add_ring_to_group(struct hns3_enet_ring_group *group,
                                   struct hns3_enet_ring *ring)
{
        ring->next = group->ring;
        group->ring = ring;

        group->count++;
}

static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv)
{
        struct hnae3_ring_chain_node vector_ring_chain;
        struct hnae3_handle *h = priv->ae_handle;
        struct hns3_enet_tqp_vector *tqp_vector;
        struct hnae3_vector_info *vector;
        struct pci_dev *pdev = h->pdev;
        u16 tqp_num = h->kinfo.num_tqps;
        u16 vector_num;
        int ret = 0;
        u16 i;

        /* RSS size, cpu online and vector_num should be the same */
        /* Should consider 2p/4p later */
        vector_num = min_t(u16, num_online_cpus(), tqp_num);
        vector = devm_kcalloc(&pdev->dev, vector_num, sizeof(*vector),
                              GFP_KERNEL);
        if (!vector)
                return -ENOMEM;

        vector_num = h->ae_algo->ops->get_vector(h, vector_num, vector);

        priv->vector_num = vector_num;
        priv->tqp_vector = (struct hns3_enet_tqp_vector *)
                devm_kcalloc(&pdev->dev, vector_num, sizeof(*priv->tqp_vector),
                             GFP_KERNEL);
        if (!priv->tqp_vector)
                return -ENOMEM;

        for (i = 0; i < tqp_num; i++) {
                u16 vector_i = i % vector_num;

                tqp_vector = &priv->tqp_vector[vector_i];

                hns3_add_ring_to_group(&tqp_vector->tx_group,
                                       priv->ring_data[i].ring);

                hns3_add_ring_to_group(&tqp_vector->rx_group,
                                       priv->ring_data[i + tqp_num].ring);

                tqp_vector->idx = vector_i;
                tqp_vector->mask_addr = vector[vector_i].io_addr;
                tqp_vector->vector_irq = vector[vector_i].vector;
                tqp_vector->num_tqps++;

                priv->ring_data[i].ring->tqp_vector = tqp_vector;
                priv->ring_data[i + tqp_num].ring->tqp_vector = tqp_vector;
        }

        for (i = 0; i < vector_num; i++) {
                tqp_vector = &priv->tqp_vector[i];

                tqp_vector->rx_group.total_bytes = 0;
                tqp_vector->rx_group.total_packets = 0;
                tqp_vector->tx_group.total_bytes = 0;
                tqp_vector->tx_group.total_packets = 0;
                hns3_vector_gl_rl_init(tqp_vector);
                tqp_vector->handle = h;

                ret = hns3_get_vector_ring_chain(tqp_vector,
                                                 &vector_ring_chain);
                if (ret)
                        goto out;

                ret = h->ae_algo->ops->map_ring_to_vector(h,
                        tqp_vector->vector_irq, &vector_ring_chain);
                if (ret)
                        goto out;

                hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);

                netif_napi_add(priv->netdev, &tqp_vector->napi,
                               hns3_nic_common_poll, NAPI_POLL_WEIGHT);
        }

out:
        devm_kfree(&pdev->dev, vector);
        return ret;
}

static int hns3_nic_uninit_vector_data(struct hns3_nic_priv *priv)
{
        struct hnae3_ring_chain_node vector_ring_chain;
        struct hnae3_handle *h = priv->ae_handle;
        struct hns3_enet_tqp_vector *tqp_vector;
        struct pci_dev *pdev = h->pdev;
        int i, ret;

        for (i = 0; i < priv->vector_num; i++) {
                tqp_vector = &priv->tqp_vector[i];

                ret = hns3_get_vector_ring_chain(tqp_vector,
                                                 &vector_ring_chain);
                if (ret)
                        return ret;

                ret = h->ae_algo->ops->unmap_ring_from_vector(h,
                        tqp_vector->vector_irq, &vector_ring_chain);
                if (ret)
                        return ret;

                hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);

                if (priv->tqp_vector[i].irq_init_flag == HNS3_VECTOR_INITED) {
                        (void)irq_set_affinity_hint(
                                priv->tqp_vector[i].vector_irq,
                                                    NULL);
                        devm_free_irq(&pdev->dev,
                                      priv->tqp_vector[i].vector_irq,
                                      &priv->tqp_vector[i]);
                }

                priv->ring_data[i].ring->irq_init_flag = HNS3_VECTOR_NOT_INITED;

                netif_napi_del(&priv->tqp_vector[i].napi);
        }

        devm_kfree(&pdev->dev, priv->tqp_vector);

        return 0;
}

static int hns3_ring_get_cfg(struct hnae3_queue *q, struct hns3_nic_priv *priv,
                             int ring_type)
{
        struct hns3_nic_ring_data *ring_data = priv->ring_data;
        int queue_num = priv->ae_handle->kinfo.num_tqps;
        struct pci_dev *pdev = priv->ae_handle->pdev;
        struct hns3_enet_ring *ring;

        ring = devm_kzalloc(&pdev->dev, sizeof(*ring), GFP_KERNEL);
        if (!ring)
                return -ENOMEM;

        if (ring_type == HNAE3_RING_TYPE_TX) {
                ring_data[q->tqp_index].ring = ring;
                ring->io_base = (u8 __iomem *)q->io_base + HNS3_TX_REG_OFFSET;
        } else {
                ring_data[q->tqp_index + queue_num].ring = ring;
                ring->io_base = q->io_base;
        }

        hnae_set_bit(ring->flag, HNAE3_RING_TYPE_B, ring_type);

        ring_data[q->tqp_index].queue_index = q->tqp_index;

        ring->tqp = q;
        ring->desc = NULL;
        ring->desc_cb = NULL;
        ring->dev = priv->dev;
        ring->desc_dma_addr = 0;
        ring->buf_size = q->buf_size;
        ring->desc_num = q->desc_num;
        ring->next_to_use = 0;
        ring->next_to_clean = 0;

        return 0;
}

static int hns3_queue_to_ring(struct hnae3_queue *tqp,
                              struct hns3_nic_priv *priv)
{
        int ret;

        ret = hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_TX);
        if (ret)
                return ret;

        ret = hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_RX);
        if (ret)
                return ret;

        return 0;
}

static int hns3_get_ring_config(struct hns3_nic_priv *priv)
{
        struct hnae3_handle *h = priv->ae_handle;
        struct pci_dev *pdev = h->pdev;
        int i, ret;

        priv->ring_data =  devm_kzalloc(&pdev->dev, h->kinfo.num_tqps *
                                        sizeof(*priv->ring_data) * 2,
                                        GFP_KERNEL);
        if (!priv->ring_data)
                return -ENOMEM;

        for (i = 0; i < h->kinfo.num_tqps; i++) {
                ret = hns3_queue_to_ring(h->kinfo.tqp[i], priv);
                if (ret)
                        goto err;
        }

        return 0;
err:
        devm_kfree(&pdev->dev, priv->ring_data);
        return ret;
}

static int hns3_alloc_ring_memory(struct hns3_enet_ring *ring)
{
        int ret;

        if (ring->desc_num <= 0 || ring->buf_size <= 0)
                return -EINVAL;

        ring->desc_cb = kcalloc(ring->desc_num, sizeof(ring->desc_cb[0]),
                                GFP_KERNEL);
        if (!ring->desc_cb) {
                ret = -ENOMEM;
                goto out;
        }

        ret = hns3_alloc_desc(ring);
        if (ret)
                goto out_with_desc_cb;

        if (!HNAE3_IS_TX_RING(ring)) {
                ret = hns3_alloc_ring_buffers(ring);
                if (ret)
                        goto out_with_desc;
        }

        return 0;

out_with_desc:
        hns3_free_desc(ring);
out_with_desc_cb:
        kfree(ring->desc_cb);
        ring->desc_cb = NULL;
out:
        return ret;
}

static void hns3_fini_ring(struct hns3_enet_ring *ring)
{
        hns3_free_desc(ring);
        kfree(ring->desc_cb);
        ring->desc_cb = NULL;
        ring->next_to_clean = 0;
        ring->next_to_use = 0;
}

int hns3_buf_size2type(u32 buf_size)
{
        int bd_size_type;

        switch (buf_size) {
        case 512:
                bd_size_type = HNS3_BD_SIZE_512_TYPE;
                break;
        case 1024:
                bd_size_type = HNS3_BD_SIZE_1024_TYPE;
                break;
        case 2048:
                bd_size_type = HNS3_BD_SIZE_2048_TYPE;
                break;
        case 4096:
                bd_size_type = HNS3_BD_SIZE_4096_TYPE;
                break;
        default:
                bd_size_type = HNS3_BD_SIZE_2048_TYPE;
        }

        return bd_size_type;
}

static void hns3_init_ring_hw(struct hns3_enet_ring *ring)
{
        dma_addr_t dma = ring->desc_dma_addr;
        struct hnae3_queue *q = ring->tqp;

        if (!HNAE3_IS_TX_RING(ring)) {
                hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_L_REG,
                               (u32)dma);
                hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_H_REG,
                               (u32)((dma >> 31) >> 1));

                hns3_write_dev(q, HNS3_RING_RX_RING_BD_LEN_REG,
                               hns3_buf_size2type(ring->buf_size));
                hns3_write_dev(q, HNS3_RING_RX_RING_BD_NUM_REG,
                               ring->desc_num / 8 - 1);

        } else {
                hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_L_REG,
                               (u32)dma);
                hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_H_REG,
                               (u32)((dma >> 31) >> 1));

                hns3_write_dev(q, HNS3_RING_TX_RING_BD_LEN_REG,
                               hns3_buf_size2type(ring->buf_size));
                hns3_write_dev(q, HNS3_RING_TX_RING_BD_NUM_REG,
                               ring->desc_num / 8 - 1);
        }
}

static int hns3_init_all_ring(struct hns3_nic_priv *priv)
{
        struct hnae3_handle *h = priv->ae_handle;
        int ring_num = h->kinfo.num_tqps * 2;
        int i, j;
        int ret;

        for (i = 0; i < ring_num; i++) {
                ret = hns3_alloc_ring_memory(priv->ring_data[i].ring);
                if (ret) {
                        dev_err(priv->dev,
                                "Alloc ring memory fail! ret=%d\n", ret);
                        goto out_when_alloc_ring_memory;
                }

                hns3_init_ring_hw(priv->ring_data[i].ring);

                u64_stats_init(&priv->ring_data[i].ring->syncp);
        }

        return 0;

out_when_alloc_ring_memory:
        for (j = i - 1; j >= 0; j--)
                hns3_fini_ring(priv->ring_data[i].ring);

        return -ENOMEM;
}

static int hns3_uninit_all_ring(struct hns3_nic_priv *priv)
{
        struct hnae3_handle *h = priv->ae_handle;
        int i;

        for (i = 0; i < h->kinfo.num_tqps; i++) {
                if (h->ae_algo->ops->reset_queue)
                        h->ae_algo->ops->reset_queue(h, i);

                hns3_fini_ring(priv->ring_data[i].ring);
                hns3_fini_ring(priv->ring_data[i + h->kinfo.num_tqps].ring);
        }

        return 0;
}

/* Set mac addr if it is configured. or leave it to the AE driver */
static void hns3_init_mac_addr(struct net_device *netdev)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        struct hnae3_handle *h = priv->ae_handle;
        u8 mac_addr_temp[ETH_ALEN];

        if (h->ae_algo->ops->get_mac_addr) {
                h->ae_algo->ops->get_mac_addr(h, mac_addr_temp);
                ether_addr_copy(netdev->dev_addr, mac_addr_temp);
        }

        /* Check if the MAC address is valid, if not get a random one */
        if (!is_valid_ether_addr(netdev->dev_addr)) {
                eth_hw_addr_random(netdev);
                dev_warn(priv->dev, "using random MAC address %pM\n",
                         netdev->dev_addr);
        }

        if (h->ae_algo->ops->set_mac_addr)
                h->ae_algo->ops->set_mac_addr(h, netdev->dev_addr);

}

static void hns3_nic_set_priv_ops(struct net_device *netdev)
{
        struct hns3_nic_priv *priv = netdev_priv(netdev);

        if ((netdev->features & NETIF_F_TSO) ||
            (netdev->features & NETIF_F_TSO6)) {
                priv->ops.fill_desc = hns3_fill_desc_tso;
                priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tso;
        } else {
                priv->ops.fill_desc = hns3_fill_desc;
                priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tx;
        }
}

static int hns3_client_init(struct hnae3_handle *handle)
{
        struct pci_dev *pdev = handle->pdev;
        struct hns3_nic_priv *priv;
        struct net_device *netdev;
        int ret;

        netdev = alloc_etherdev_mq(sizeof(struct hns3_nic_priv),
                                   handle->kinfo.num_tqps);
        if (!netdev)
                return -ENOMEM;

        priv = netdev_priv(netdev);
        priv->dev = &pdev->dev;
        priv->netdev = netdev;
        priv->ae_handle = handle;

        handle->kinfo.netdev = netdev;
        handle->priv = (void *)priv;

        hns3_init_mac_addr(netdev);

        hns3_set_default_feature(netdev);

        netdev->watchdog_timeo = HNS3_TX_TIMEOUT;
        netdev->priv_flags |= IFF_UNICAST_FLT;
        netdev->netdev_ops = &hns3_nic_netdev_ops;
        SET_NETDEV_DEV(netdev, &pdev->dev);
        hns3_ethtool_set_ops(netdev);
        hns3_nic_set_priv_ops(netdev);

        /* Carrier off reporting is important to ethtool even BEFORE open */
        netif_carrier_off(netdev);

        ret = hns3_get_ring_config(priv);
        if (ret) {
                ret = -ENOMEM;
                goto out_get_ring_cfg;
        }

        ret = hns3_nic_init_vector_data(priv);
        if (ret) {
                ret = -ENOMEM;
                goto out_init_vector_data;
        }

        ret = hns3_init_all_ring(priv);
        if (ret) {
                ret = -ENOMEM;
                goto out_init_ring_data;
        }

        ret = register_netdev(netdev);
        if (ret) {
                dev_err(priv->dev, "probe register netdev fail!\n");
                goto out_reg_netdev_fail;
        }

        /* MTU range: (ETH_MIN_MTU(kernel default) - 9706) */
        netdev->max_mtu = HNS3_MAX_MTU - (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);

        return ret;

out_reg_netdev_fail:
out_init_ring_data:
        (void)hns3_nic_uninit_vector_data(priv);
        priv->ring_data = NULL;
out_init_vector_data:
out_get_ring_cfg:
        priv->ae_handle = NULL;
        free_netdev(netdev);
        return ret;
}

static void hns3_client_uninit(struct hnae3_handle *handle, bool reset)
{
        struct net_device *netdev = handle->kinfo.netdev;
        struct hns3_nic_priv *priv = netdev_priv(netdev);
        int ret;

        if (netdev->reg_state != NETREG_UNINITIALIZED)
                unregister_netdev(netdev);

        ret = hns3_nic_uninit_vector_data(priv);
        if (ret)
                netdev_err(netdev, "uninit vector error\n");

        ret = hns3_uninit_all_ring(priv);
        if (ret)
                netdev_err(netdev, "uninit ring error\n");

        priv->ring_data = NULL;

        free_netdev(netdev);
}

static void hns3_link_status_change(struct hnae3_handle *handle, bool linkup)
{
        struct net_device *netdev = handle->kinfo.netdev;

        if (!netdev)
                return;

        if (linkup) {
                netif_carrier_on(netdev);
                netif_tx_wake_all_queues(netdev);
                netdev_info(netdev, "link up\n");
        } else {
                netif_carrier_off(netdev);
                netif_tx_stop_all_queues(netdev);
                netdev_info(netdev, "link down\n");
        }
}

const struct hnae3_client_ops client_ops = {
        .init_instance = hns3_client_init,
        .uninit_instance = hns3_client_uninit,
        .link_status_change = hns3_link_status_change,
};

/* hns3_init_module - Driver registration routine
 * hns3_init_module is the first routine called when the driver is
 * loaded. All it does is register with the PCI subsystem.
 */
static int __init hns3_init_module(void)
{
        int ret;

        pr_info("%s: %s - version\n", hns3_driver_name, hns3_driver_string);
        pr_info("%s: %s\n", hns3_driver_name, hns3_copyright);

        client.type = HNAE3_CLIENT_KNIC;
        snprintf(client.name, HNAE3_CLIENT_NAME_LENGTH - 1, "%s",
                 hns3_driver_name);

        client.ops = &client_ops;

        ret = hnae3_register_client(&client);
        if (ret)
                return ret;

        ret = pci_register_driver(&hns3_driver);
        if (ret)
                hnae3_unregister_client(&client);

        return ret;
}
module_init(hns3_init_module);

/* hns3_exit_module - Driver exit cleanup routine
 * hns3_exit_module is called just before the driver is removed
 * from memory.
 */
static void __exit hns3_exit_module(void)
{
        pci_unregister_driver(&hns3_driver);
        hnae3_unregister_client(&client);
}
module_exit(hns3_exit_module);

MODULE_DESCRIPTION("HNS3: Hisilicon Ethernet Driver");
MODULE_AUTHOR("Huawei Tech. Co., Ltd.");
MODULE_LICENSE("GPL");
MODULE_ALIAS("pci:hns-nic");