/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2018-2021 HiSilicon Limited.
 */

#include <linux/pci_regs.h>
#include <rte_alarm.h>
#include <ethdev_pci.h>
#include <rte_io.h>
#include <rte_pci.h>
#include <rte_vfio.h>

#include "hns3_ethdev.h"
#include "hns3_common.h"
#include "hns3_logs.h"
#include "hns3_rxtx.h"
#include "hns3_regs.h"
#include "hns3_intr.h"
#include "hns3_dcb.h"
#include "hns3_mp.h"
#include "hns3_flow.h"

#define HNS3VF_KEEP_ALIVE_INTERVAL      2000000 /* us */
#define HNS3VF_SERVICE_INTERVAL         1000000 /* us */

#define HNS3VF_RESET_WAIT_MS    20
#define HNS3VF_RESET_WAIT_CNT   2000

/* Reset related Registers */
#define HNS3_GLOBAL_RESET_BIT           0
#define HNS3_CORE_RESET_BIT             1
#define HNS3_IMP_RESET_BIT              2
#define HNS3_FUN_RST_ING_B              0

enum hns3vf_evt_cause {
        HNS3VF_VECTOR0_EVENT_RST,
        HNS3VF_VECTOR0_EVENT_MBX,
        HNS3VF_VECTOR0_EVENT_OTHER,
};

static enum hns3_reset_level hns3vf_get_reset_level(struct hns3_hw *hw,
                                                    uint64_t *levels);
static int hns3vf_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu);
static int hns3vf_dev_configure_vlan(struct rte_eth_dev *dev);

static int hns3vf_add_mc_mac_addr(struct hns3_hw *hw,
                                  struct rte_ether_addr *mac_addr);
static int hns3vf_remove_mc_mac_addr(struct hns3_hw *hw,
                                     struct rte_ether_addr *mac_addr);
static int hns3vf_dev_link_update(struct rte_eth_dev *eth_dev,
                                   __rte_unused int wait_to_complete);

/* set PCI bus mastering */
static int
hns3vf_set_bus_master(const struct rte_pci_device *device, bool op)
{
        uint16_t reg;
        int ret;

        ret = rte_pci_read_config(device, &reg, sizeof(reg), PCI_COMMAND);
        if (ret < 0) {
                PMD_INIT_LOG(ERR, "Failed to read PCI offset 0x%x",
                             PCI_COMMAND);
                return ret;
        }

        if (op)
                /* set the master bit */
                reg |= PCI_COMMAND_MASTER;
        else
                reg &= ~(PCI_COMMAND_MASTER);

        return rte_pci_write_config(device, &reg, sizeof(reg), PCI_COMMAND);
}

/**
 * hns3vf_find_pci_capability - lookup a capability in the PCI capability list
 * @cap: the capability
 *
 * Return the address of the given capability within the PCI capability list.
 */
static int
hns3vf_find_pci_capability(const struct rte_pci_device *device, int cap)
{
#define MAX_PCIE_CAPABILITY 48
        uint16_t status;
        uint8_t pos;
        uint8_t id;
        int ttl;
        int ret;

        ret = rte_pci_read_config(device, &status, sizeof(status), PCI_STATUS);
        if (ret < 0) {
                PMD_INIT_LOG(ERR, "Failed to read PCI offset 0x%x", PCI_STATUS);
                return 0;
        }

        if (!(status & PCI_STATUS_CAP_LIST))
                return 0;

        ttl = MAX_PCIE_CAPABILITY;
        ret = rte_pci_read_config(device, &pos, sizeof(pos),
                                  PCI_CAPABILITY_LIST);
        if (ret < 0) {
                PMD_INIT_LOG(ERR, "Failed to read PCI offset 0x%x",
                             PCI_CAPABILITY_LIST);
                return 0;
        }

        while (ttl-- && pos >= PCI_STD_HEADER_SIZEOF) {
                ret = rte_pci_read_config(device, &id, sizeof(id),
                                          (pos + PCI_CAP_LIST_ID));
                if (ret < 0) {
                        PMD_INIT_LOG(ERR, "Failed to read PCI offset 0x%x",
                                     (pos + PCI_CAP_LIST_ID));
                        break;
                }

                if (id == 0xFF)
                        break;

                if (id == cap)
                        return (int)pos;

                ret = rte_pci_read_config(device, &pos, sizeof(pos),
                                          (pos + PCI_CAP_LIST_NEXT));
                if (ret < 0) {
                        PMD_INIT_LOG(ERR, "Failed to read PCI offset 0x%x",
                                     (pos + PCI_CAP_LIST_NEXT));
                        break;
                }
        }
        return 0;
}

static int
hns3vf_enable_msix(const struct rte_pci_device *device, bool op)
{
        uint16_t control;
        int pos;
        int ret;

        pos = hns3vf_find_pci_capability(device, PCI_CAP_ID_MSIX);
        if (pos) {
                ret = rte_pci_read_config(device, &control, sizeof(control),
                                    (pos + PCI_MSIX_FLAGS));
                if (ret < 0) {
                        PMD_INIT_LOG(ERR, "Failed to read PCI offset 0x%x",
                                     (pos + PCI_MSIX_FLAGS));
                        return -ENXIO;
                }

                if (op)
                        control |= PCI_MSIX_FLAGS_ENABLE;
                else
                        control &= ~PCI_MSIX_FLAGS_ENABLE;
                ret = rte_pci_write_config(device, &control, sizeof(control),
                                          (pos + PCI_MSIX_FLAGS));
                if (ret < 0) {
                        PMD_INIT_LOG(ERR, "failed to write PCI offset 0x%x",
                                    (pos + PCI_MSIX_FLAGS));
                        return -ENXIO;
                }

                return 0;
        }

        return -ENXIO;
}

static int
hns3vf_add_uc_mac_addr(struct hns3_hw *hw, struct rte_ether_addr *mac_addr)
{
        /* mac address was checked by upper level interface */
        char mac_str[RTE_ETHER_ADDR_FMT_SIZE];
        int ret;

        ret = hns3_send_mbx_msg(hw, HNS3_MBX_SET_UNICAST,
                                HNS3_MBX_MAC_VLAN_UC_ADD, mac_addr->addr_bytes,
                                RTE_ETHER_ADDR_LEN, false, NULL, 0);
        if (ret) {
                hns3_ether_format_addr(mac_str, RTE_ETHER_ADDR_FMT_SIZE,
                                      mac_addr);
                hns3_err(hw, "failed to add uc mac addr(%s), ret = %d",
                         mac_str, ret);
        }
        return ret;
}

static int
hns3vf_remove_uc_mac_addr(struct hns3_hw *hw, struct rte_ether_addr *mac_addr)
{
        /* mac address was checked by upper level interface */
        char mac_str[RTE_ETHER_ADDR_FMT_SIZE];
        int ret;

        ret = hns3_send_mbx_msg(hw, HNS3_MBX_SET_UNICAST,
                                HNS3_MBX_MAC_VLAN_UC_REMOVE,
                                mac_addr->addr_bytes, RTE_ETHER_ADDR_LEN,
                                false, NULL, 0);
        if (ret) {
                hns3_ether_format_addr(mac_str, RTE_ETHER_ADDR_FMT_SIZE,
                                      mac_addr);
                hns3_err(hw, "failed to add uc mac addr(%s), ret = %d",
                         mac_str, ret);
        }
        return ret;
}

static int
hns3vf_set_default_mac_addr(struct rte_eth_dev *dev,
                            struct rte_ether_addr *mac_addr)
{
#define HNS3_TWO_ETHER_ADDR_LEN (RTE_ETHER_ADDR_LEN * 2)
        struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
        struct rte_ether_addr *old_addr;
        uint8_t addr_bytes[HNS3_TWO_ETHER_ADDR_LEN]; /* for 2 MAC addresses */
        char mac_str[RTE_ETHER_ADDR_FMT_SIZE];
        int ret;

        /*
         * It has been guaranteed that input parameter named mac_addr is valid
         * address in the rte layer of DPDK framework.
         */
        old_addr = (struct rte_ether_addr *)hw->mac.mac_addr;
        rte_spinlock_lock(&hw->lock);
        memcpy(addr_bytes, mac_addr->addr_bytes, RTE_ETHER_ADDR_LEN);
        memcpy(&addr_bytes[RTE_ETHER_ADDR_LEN], old_addr->addr_bytes,
               RTE_ETHER_ADDR_LEN);

        ret = hns3_send_mbx_msg(hw, HNS3_MBX_SET_UNICAST,
                                HNS3_MBX_MAC_VLAN_UC_MODIFY, addr_bytes,
                                HNS3_TWO_ETHER_ADDR_LEN, true, NULL, 0);
        if (ret) {
                /*
                 * The hns3 VF PMD depends on the hns3 PF kernel ethdev
                 * driver. When user has configured a MAC address for VF device
                 * by "ip link set ..." command based on the PF device, the hns3
                 * PF kernel ethdev driver does not allow VF driver to request
                 * reconfiguring a different default MAC address, and return
                 * -EPREM to VF driver through mailbox.
                 */
                if (ret == -EPERM) {
                        hns3_ether_format_addr(mac_str, RTE_ETHER_ADDR_FMT_SIZE,
                                              old_addr);
                        hns3_warn(hw, "Has permanet mac addr(%s) for vf",
                                  mac_str);
                } else {
                        hns3_ether_format_addr(mac_str, RTE_ETHER_ADDR_FMT_SIZE,
                                              mac_addr);
                        hns3_err(hw, "Failed to set mac addr(%s) for vf: %d",
                                 mac_str, ret);
                }
        }

        rte_ether_addr_copy(mac_addr,
                            (struct rte_ether_addr *)hw->mac.mac_addr);
        rte_spinlock_unlock(&hw->lock);

        return ret;
}

static int
hns3vf_add_mc_mac_addr(struct hns3_hw *hw,
                       struct rte_ether_addr *mac_addr)
{
        char mac_str[RTE_ETHER_ADDR_FMT_SIZE];
        int ret;

        ret = hns3_send_mbx_msg(hw, HNS3_MBX_SET_MULTICAST,
                                HNS3_MBX_MAC_VLAN_MC_ADD,
                                mac_addr->addr_bytes, RTE_ETHER_ADDR_LEN, false,
                                NULL, 0);
        if (ret) {
                hns3_ether_format_addr(mac_str, RTE_ETHER_ADDR_FMT_SIZE,
                                      mac_addr);
                hns3_err(hw, "Failed to add mc mac addr(%s) for vf: %d",
                         mac_str, ret);
        }

        return ret;
}

static int
hns3vf_remove_mc_mac_addr(struct hns3_hw *hw,
                          struct rte_ether_addr *mac_addr)
{
        char mac_str[RTE_ETHER_ADDR_FMT_SIZE];
        int ret;

        ret = hns3_send_mbx_msg(hw, HNS3_MBX_SET_MULTICAST,
                                HNS3_MBX_MAC_VLAN_MC_REMOVE,
                                mac_addr->addr_bytes, RTE_ETHER_ADDR_LEN, false,
                                NULL, 0);
        if (ret) {
                hns3_ether_format_addr(mac_str, RTE_ETHER_ADDR_FMT_SIZE,
                                      mac_addr);
                hns3_err(hw, "Failed to remove mc mac addr(%s) for vf: %d",
                         mac_str, ret);
        }

        return ret;
}

static int
hns3vf_set_promisc_mode(struct hns3_hw *hw, bool en_bc_pmc,
                        bool en_uc_pmc, bool en_mc_pmc)
{
        struct hns3_mbx_vf_to_pf_cmd *req;
        struct hns3_cmd_desc desc;
        int ret;

        req = (struct hns3_mbx_vf_to_pf_cmd *)desc.data;

        /*
         * The hns3 VF PMD depends on the hns3 PF kernel ethdev driver,
         * so there are some features for promiscuous/allmulticast mode in hns3
         * VF PMD as below:
         * 1. The promiscuous/allmulticast mode can be configured successfully
         *    only based on the trusted VF device. If based on the non trusted
         *    VF device, configuring promiscuous/allmulticast mode will fail.
         *    The hns3 VF device can be confiruged as trusted device by hns3 PF
         *    kernel ethdev driver on the host by the following command:
         *      "ip link set <eth num> vf <vf id> turst on"
         * 2. After the promiscuous mode is configured successfully, hns3 VF PMD
         *    can receive the ingress and outgoing traffic. This includes
         *    all the ingress packets, all the packets sent from the PF and
         *    other VFs on the same physical port.
         * 3. Note: Because of the hardware constraints, By default vlan filter
         *    is enabled and couldn't be turned off based on VF device, so vlan
         *    filter is still effective even in promiscuous mode. If upper
         *    applications don't call rte_eth_dev_vlan_filter API function to
         *    set vlan based on VF device, hns3 VF PMD will can't receive
         *    the packets with vlan tag in promiscuoue mode.
         */
        hns3_cmd_setup_basic_desc(&desc, HNS3_OPC_MBX_VF_TO_PF, false);
        req->msg[0] = HNS3_MBX_SET_PROMISC_MODE;
        req->msg[1] = en_bc_pmc ? 1 : 0;
        req->msg[2] = en_uc_pmc ? 1 : 0;
        req->msg[3] = en_mc_pmc ? 1 : 0;
        req->msg[4] = hw->promisc_mode == HNS3_LIMIT_PROMISC_MODE ? 1 : 0;

        ret = hns3_cmd_send(hw, &desc, 1);
        if (ret)
                hns3_err(hw, "Set promisc mode fail, ret = %d", ret);

        return ret;
}

static int
hns3vf_dev_promiscuous_enable(struct rte_eth_dev *dev)
{
        struct hns3_adapter *hns = dev->data->dev_private;
        struct hns3_hw *hw = &hns->hw;
        int ret;

        ret = hns3vf_set_promisc_mode(hw, true, true, true);
        if (ret)
                hns3_err(hw, "Failed to enable promiscuous mode, ret = %d",
                        ret);
        return ret;
}

static int
hns3vf_dev_promiscuous_disable(struct rte_eth_dev *dev)
{
        bool allmulti = dev->data->all_multicast ? true : false;
        struct hns3_adapter *hns = dev->data->dev_private;
        struct hns3_hw *hw = &hns->hw;
        int ret;

        ret = hns3vf_set_promisc_mode(hw, true, false, allmulti);
        if (ret)
                hns3_err(hw, "Failed to disable promiscuous mode, ret = %d",
                        ret);
        return ret;
}

static int
hns3vf_dev_allmulticast_enable(struct rte_eth_dev *dev)
{
        struct hns3_adapter *hns = dev->data->dev_private;
        struct hns3_hw *hw = &hns->hw;
        int ret;

        if (dev->data->promiscuous)
                return 0;

        ret = hns3vf_set_promisc_mode(hw, true, false, true);
        if (ret)
                hns3_err(hw, "Failed to enable allmulticast mode, ret = %d",
                        ret);
        return ret;
}

static int
hns3vf_dev_allmulticast_disable(struct rte_eth_dev *dev)
{
        struct hns3_adapter *hns = dev->data->dev_private;
        struct hns3_hw *hw = &hns->hw;
        int ret;

        if (dev->data->promiscuous)
                return 0;

        ret = hns3vf_set_promisc_mode(hw, true, false, false);
        if (ret)
                hns3_err(hw, "Failed to disable allmulticast mode, ret = %d",
                        ret);
        return ret;
}

static int
hns3vf_restore_promisc(struct hns3_adapter *hns)
{
        struct hns3_hw *hw = &hns->hw;
        bool allmulti = hw->data->all_multicast ? true : false;

        if (hw->data->promiscuous)
                return hns3vf_set_promisc_mode(hw, true, true, true);

        return hns3vf_set_promisc_mode(hw, true, false, allmulti);
}

static int
hns3vf_bind_ring_with_vector(struct hns3_hw *hw, uint16_t vector_id,
                             bool mmap, enum hns3_ring_type queue_type,
                             uint16_t queue_id)
{
        struct hns3_vf_bind_vector_msg bind_msg;
        const char *op_str;
        uint16_t code;
        int ret;

        memset(&bind_msg, 0, sizeof(bind_msg));
        code = mmap ? HNS3_MBX_MAP_RING_TO_VECTOR :
                HNS3_MBX_UNMAP_RING_TO_VECTOR;
        bind_msg.vector_id = (uint8_t)vector_id;

        if (queue_type == HNS3_RING_TYPE_RX)
                bind_msg.param[0].int_gl_index = HNS3_RING_GL_RX;
        else
                bind_msg.param[0].int_gl_index = HNS3_RING_GL_TX;

        bind_msg.param[0].ring_type = queue_type;
        bind_msg.ring_num = 1;
        bind_msg.param[0].tqp_index = queue_id;
        op_str = mmap ? "Map" : "Unmap";
        ret = hns3_send_mbx_msg(hw, code, 0, (uint8_t *)&bind_msg,
                                sizeof(bind_msg), false, NULL, 0);
        if (ret)
                hns3_err(hw, "%s TQP %u fail, vector_id is %u, ret is %d.",
                         op_str, queue_id, bind_msg.vector_id, ret);

        return ret;
}

static int
hns3vf_dev_configure(struct rte_eth_dev *dev)
{
        struct hns3_adapter *hns = dev->data->dev_private;
        struct hns3_hw *hw = &hns->hw;
        struct rte_eth_conf *conf = &dev->data->dev_conf;
        enum rte_eth_rx_mq_mode mq_mode = conf->rxmode.mq_mode;
        uint16_t nb_rx_q = dev->data->nb_rx_queues;
        uint16_t nb_tx_q = dev->data->nb_tx_queues;
        struct rte_eth_rss_conf rss_conf;
        bool gro_en;
        int ret;

        hw->cfg_max_queues = RTE_MAX(nb_rx_q, nb_tx_q);

        /*
         * Some versions of hardware network engine does not support
         * individually enable/disable/reset the Tx or Rx queue. These devices
         * must enable/disable/reset Tx and Rx queues at the same time. When the
         * numbers of Tx queues allocated by upper applications are not equal to
         * the numbers of Rx queues, driver needs to setup fake Tx or Rx queues
         * to adjust numbers of Tx/Rx queues. otherwise, network engine can not
         * work as usual. But these fake queues are imperceptible, and can not
         * be used by upper applications.
         */
        ret = hns3_set_fake_rx_or_tx_queues(dev, nb_rx_q, nb_tx_q);
        if (ret) {
                hns3_err(hw, "fail to set Rx/Tx fake queues, ret = %d.", ret);
                hw->cfg_max_queues = 0;
                return ret;
        }

        hw->adapter_state = HNS3_NIC_CONFIGURING;
        if (conf->link_speeds & RTE_ETH_LINK_SPEED_FIXED) {
                hns3_err(hw, "setting link speed/duplex not supported");
                ret = -EINVAL;
                goto cfg_err;
        }

        /* When RSS is not configured, redirect the packet queue 0 */
        if ((uint32_t)mq_mode & RTE_ETH_MQ_RX_RSS_FLAG) {
                conf->rxmode.offloads |= RTE_ETH_RX_OFFLOAD_RSS_HASH;
                hw->rss_dis_flag = false;
                rss_conf = conf->rx_adv_conf.rss_conf;
                ret = hns3_dev_rss_hash_update(dev, &rss_conf);
                if (ret)
                        goto cfg_err;
        }

        ret = hns3vf_dev_mtu_set(dev, conf->rxmode.mtu);
        if (ret != 0)
                goto cfg_err;

        ret = hns3vf_dev_configure_vlan(dev);
        if (ret)
                goto cfg_err;

        /* config hardware GRO */
        gro_en = conf->rxmode.offloads & RTE_ETH_RX_OFFLOAD_TCP_LRO ? true : false;
        ret = hns3_config_gro(hw, gro_en);
        if (ret)
                goto cfg_err;

        hns3_init_rx_ptype_tble(dev);

        hw->adapter_state = HNS3_NIC_CONFIGURED;
        return 0;

cfg_err:
        hw->cfg_max_queues = 0;
        (void)hns3_set_fake_rx_or_tx_queues(dev, 0, 0);
        hw->adapter_state = HNS3_NIC_INITIALIZED;

        return ret;
}

static int
hns3vf_config_mtu(struct hns3_hw *hw, uint16_t mtu)
{
        int ret;

        ret = hns3_send_mbx_msg(hw, HNS3_MBX_SET_MTU, 0, (const uint8_t *)&mtu,
                                sizeof(mtu), true, NULL, 0);
        if (ret)
                hns3_err(hw, "Failed to set mtu (%u) for vf: %d", mtu, ret);

        return ret;
}

static int
hns3vf_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
{
        struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
        uint32_t frame_size = mtu + HNS3_ETH_OVERHEAD;
        int ret;

        /*
         * The hns3 PF/VF devices on the same port share the hardware MTU
         * configuration. Currently, we send mailbox to inform hns3 PF kernel
         * ethdev driver to finish hardware MTU configuration in hns3 VF PMD,
         * there is no need to stop the port for hns3 VF device, and the
         * MTU value issued by hns3 VF PMD must be less than or equal to
         * PF's MTU.
         */
        if (__atomic_load_n(&hw->reset.resetting, __ATOMIC_RELAXED)) {
                hns3_err(hw, "Failed to set mtu during resetting");
                return -EIO;
        }

        /*
         * when Rx of scattered packets is off, we have some possibility of
         * using vector Rx process function or simple Rx functions in hns3 PMD.
         * If the input MTU is increased and the maximum length of
         * received packets is greater than the length of a buffer for Rx
         * packet, the hardware network engine needs to use multiple BDs and
         * buffers to store these packets. This will cause problems when still
         * using vector Rx process function or simple Rx function to receiving
         * packets. So, when Rx of scattered packets is off and device is
         * started, it is not permitted to increase MTU so that the maximum
         * length of Rx packets is greater than Rx buffer length.
         */
        if (dev->data->dev_started && !dev->data->scattered_rx &&
            frame_size > hw->rx_buf_len) {
                hns3_err(hw, "failed to set mtu because current is "
                        "not scattered rx mode");
                return -EOPNOTSUPP;
        }

        rte_spinlock_lock(&hw->lock);
        ret = hns3vf_config_mtu(hw, mtu);
        if (ret) {
                rte_spinlock_unlock(&hw->lock);
                return ret;
        }
        rte_spinlock_unlock(&hw->lock);

        return 0;
}

static void
hns3vf_clear_event_cause(struct hns3_hw *hw, uint32_t regclr)
{
        hns3_write_dev(hw, HNS3_VECTOR0_CMDQ_SRC_REG, regclr);
}

static void
hns3vf_disable_irq0(struct hns3_hw *hw)
{
        hns3_write_dev(hw, HNS3_MISC_VECTOR_REG_BASE, 0);
}

static void
hns3vf_enable_irq0(struct hns3_hw *hw)
{
        hns3_write_dev(hw, HNS3_MISC_VECTOR_REG_BASE, 1);
}

static enum hns3vf_evt_cause
hns3vf_check_event_cause(struct hns3_adapter *hns, uint32_t *clearval)
{
        struct hns3_hw *hw = &hns->hw;
        enum hns3vf_evt_cause ret;
        uint32_t cmdq_stat_reg;
        uint32_t rst_ing_reg;
        uint32_t val;

        /* Fetch the events from their corresponding regs */
        cmdq_stat_reg = hns3_read_dev(hw, HNS3_VECTOR0_CMDQ_STAT_REG);
        if (BIT(HNS3_VECTOR0_RST_INT_B) & cmdq_stat_reg) {
                rst_ing_reg = hns3_read_dev(hw, HNS3_FUN_RST_ING);
                hns3_warn(hw, "resetting reg: 0x%x", rst_ing_reg);
                hns3_atomic_set_bit(HNS3_VF_RESET, &hw->reset.pending);
                __atomic_store_n(&hw->reset.disable_cmd, 1, __ATOMIC_RELAXED);
                val = hns3_read_dev(hw, HNS3_VF_RST_ING);
                hns3_write_dev(hw, HNS3_VF_RST_ING, val | HNS3_VF_RST_ING_BIT);
                val = cmdq_stat_reg & ~BIT(HNS3_VECTOR0_RST_INT_B);
                if (clearval) {
                        hw->reset.stats.global_cnt++;
                        hns3_warn(hw, "Global reset detected, clear reset status");
                } else {
                        hns3_schedule_delayed_reset(hns);
                        hns3_warn(hw, "Global reset detected, don't clear reset status");
                }

                ret = HNS3VF_VECTOR0_EVENT_RST;
                goto out;
        }

        /* Check for vector0 mailbox(=CMDQ RX) event source */
        if (BIT(HNS3_VECTOR0_RX_CMDQ_INT_B) & cmdq_stat_reg) {
                val = cmdq_stat_reg & ~BIT(HNS3_VECTOR0_RX_CMDQ_INT_B);
                ret = HNS3VF_VECTOR0_EVENT_MBX;
                goto out;
        }

        val = 0;
        ret = HNS3VF_VECTOR0_EVENT_OTHER;
out:
        if (clearval)
                *clearval = val;
        return ret;
}

static void
hns3vf_interrupt_handler(void *param)
{
        struct rte_eth_dev *dev = (struct rte_eth_dev *)param;
        struct hns3_adapter *hns = dev->data->dev_private;
        struct hns3_hw *hw = &hns->hw;
        enum hns3vf_evt_cause event_cause;
        uint32_t clearval;

        /* Disable interrupt */
        hns3vf_disable_irq0(hw);

        /* Read out interrupt causes */
        event_cause = hns3vf_check_event_cause(hns, &clearval);
        /* Clear interrupt causes */
        hns3vf_clear_event_cause(hw, clearval);

        switch (event_cause) {
        case HNS3VF_VECTOR0_EVENT_RST:
                hns3_schedule_reset(hns);
                break;
        case HNS3VF_VECTOR0_EVENT_MBX:
                hns3_dev_handle_mbx_msg(hw);
                break;
        default:
                break;
        }

        /* Enable interrupt */
        hns3vf_enable_irq0(hw);
}

static void
hns3vf_set_default_dev_specifications(struct hns3_hw *hw)
{
        hw->max_non_tso_bd_num = HNS3_MAX_NON_TSO_BD_PER_PKT;
        hw->rss_ind_tbl_size = HNS3_RSS_IND_TBL_SIZE;
        hw->rss_key_size = HNS3_RSS_KEY_SIZE;
        hw->intr.int_ql_max = HNS3_INTR_QL_NONE;
}

static void
hns3vf_parse_dev_specifications(struct hns3_hw *hw, struct hns3_cmd_desc *desc)
{
        struct hns3_dev_specs_0_cmd *req0;

        req0 = (struct hns3_dev_specs_0_cmd *)desc[0].data;

        hw->max_non_tso_bd_num = req0->max_non_tso_bd_num;
        hw->rss_ind_tbl_size = rte_le_to_cpu_16(req0->rss_ind_tbl_size);
        hw->rss_key_size = rte_le_to_cpu_16(req0->rss_key_size);
        hw->intr.int_ql_max = rte_le_to_cpu_16(req0->intr_ql_max);
}

static int
hns3vf_check_dev_specifications(struct hns3_hw *hw)
{
        if (hw->rss_ind_tbl_size == 0 ||
            hw->rss_ind_tbl_size > HNS3_RSS_IND_TBL_SIZE_MAX) {
                hns3_warn(hw, "the size of hash lookup table configured (%u)"
                              " exceeds the maximum(%u)", hw->rss_ind_tbl_size,
                              HNS3_RSS_IND_TBL_SIZE_MAX);
                return -EINVAL;
        }

        return 0;
}

static int
hns3vf_query_dev_specifications(struct hns3_hw *hw)
{
        struct hns3_cmd_desc desc[HNS3_QUERY_DEV_SPECS_BD_NUM];
        int ret;
        int i;

        for (i = 0; i < HNS3_QUERY_DEV_SPECS_BD_NUM - 1; i++) {
                hns3_cmd_setup_basic_desc(&desc[i], HNS3_OPC_QUERY_DEV_SPECS,
                                          true);
                desc[i].flag |= rte_cpu_to_le_16(HNS3_CMD_FLAG_NEXT);
        }
        hns3_cmd_setup_basic_desc(&desc[i], HNS3_OPC_QUERY_DEV_SPECS, true);

        ret = hns3_cmd_send(hw, desc, HNS3_QUERY_DEV_SPECS_BD_NUM);
        if (ret)
                return ret;

        hns3vf_parse_dev_specifications(hw, desc);

        return hns3vf_check_dev_specifications(hw);
}

void
hns3vf_update_push_lsc_cap(struct hns3_hw *hw, bool supported)
{
        uint16_t val = supported ? HNS3_PF_PUSH_LSC_CAP_SUPPORTED :
                                   HNS3_PF_PUSH_LSC_CAP_NOT_SUPPORTED;
        uint16_t exp = HNS3_PF_PUSH_LSC_CAP_UNKNOWN;
        struct hns3_vf *vf = HNS3_DEV_HW_TO_VF(hw);

        if (vf->pf_push_lsc_cap == HNS3_PF_PUSH_LSC_CAP_UNKNOWN)
                __atomic_compare_exchange(&vf->pf_push_lsc_cap, &exp, &val, 0,
                                          __ATOMIC_ACQUIRE, __ATOMIC_ACQUIRE);
}

static void
hns3vf_get_push_lsc_cap(struct hns3_hw *hw)
{
#define HNS3_CHECK_PUSH_LSC_CAP_TIMEOUT_MS      500

        struct rte_eth_dev *dev = &rte_eth_devices[hw->data->port_id];
        int32_t remain_ms = HNS3_CHECK_PUSH_LSC_CAP_TIMEOUT_MS;
        uint16_t val = HNS3_PF_PUSH_LSC_CAP_NOT_SUPPORTED;
        uint16_t exp = HNS3_PF_PUSH_LSC_CAP_UNKNOWN;
        struct hns3_vf *vf = HNS3_DEV_HW_TO_VF(hw);

        __atomic_store_n(&vf->pf_push_lsc_cap, HNS3_PF_PUSH_LSC_CAP_UNKNOWN,
                         __ATOMIC_RELEASE);

        (void)hns3_send_mbx_msg(hw, HNS3_MBX_GET_LINK_STATUS, 0, NULL, 0, false,
                                NULL, 0);

        while (remain_ms > 0) {
                rte_delay_ms(HNS3_POLL_RESPONE_MS);
                if (__atomic_load_n(&vf->pf_push_lsc_cap, __ATOMIC_ACQUIRE) !=
                        HNS3_PF_PUSH_LSC_CAP_UNKNOWN)
                        break;
                remain_ms--;
        }

        /*
         * When exit above loop, the pf_push_lsc_cap could be one of the three
         * state: unknown (means pf not ack), not_supported, supported.
         * Here config it as 'not_supported' when it's 'unknown' state.
         */
        __atomic_compare_exchange(&vf->pf_push_lsc_cap, &exp, &val, 0,
                                  __ATOMIC_ACQUIRE, __ATOMIC_ACQUIRE);

        if (__atomic_load_n(&vf->pf_push_lsc_cap, __ATOMIC_ACQUIRE) ==
                HNS3_PF_PUSH_LSC_CAP_SUPPORTED) {
                hns3_info(hw, "detect PF support push link status change!");
        } else {
                /*
                 * Framework already set RTE_ETH_DEV_INTR_LSC bit because driver
                 * declared RTE_PCI_DRV_INTR_LSC in drv_flags. So here cleared
                 * the RTE_ETH_DEV_INTR_LSC capability.
                 */
                dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
        }
}

static int
hns3vf_get_capability(struct hns3_hw *hw)
{
        struct rte_pci_device *pci_dev;
        struct rte_eth_dev *eth_dev;
        uint8_t revision;
        int ret;

        eth_dev = &rte_eth_devices[hw->data->port_id];
        pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);

        /* Get PCI revision id */
        ret = rte_pci_read_config(pci_dev, &revision, HNS3_PCI_REVISION_ID_LEN,
                                  HNS3_PCI_REVISION_ID);
        if (ret != HNS3_PCI_REVISION_ID_LEN) {
                PMD_INIT_LOG(ERR, "failed to read pci revision id, ret = %d",
                             ret);
                return -EIO;
        }
        hw->revision = revision;

        if (revision < PCI_REVISION_ID_HIP09_A) {
                hns3vf_set_default_dev_specifications(hw);
                hw->intr.mapping_mode = HNS3_INTR_MAPPING_VEC_RSV_ONE;
                hw->intr.gl_unit = HNS3_INTR_COALESCE_GL_UINT_2US;
                hw->tso_mode = HNS3_TSO_SW_CAL_PSEUDO_H_CSUM;
                hw->drop_stats_mode = HNS3_PKTS_DROP_STATS_MODE1;
                hw->min_tx_pkt_len = HNS3_HIP08_MIN_TX_PKT_LEN;
                hw->rss_info.ipv6_sctp_offload_supported = false;
                hw->promisc_mode = HNS3_UNLIMIT_PROMISC_MODE;
                return 0;
        }

        ret = hns3vf_query_dev_specifications(hw);
        if (ret) {
                PMD_INIT_LOG(ERR,
                             "failed to query dev specifications, ret = %d",
                             ret);
                return ret;
        }

        hw->intr.mapping_mode = HNS3_INTR_MAPPING_VEC_ALL;
        hw->intr.gl_unit = HNS3_INTR_COALESCE_GL_UINT_1US;
        hw->tso_mode = HNS3_TSO_HW_CAL_PSEUDO_H_CSUM;
        hw->drop_stats_mode = HNS3_PKTS_DROP_STATS_MODE2;
        hw->min_tx_pkt_len = HNS3_HIP09_MIN_TX_PKT_LEN;
        hw->rss_info.ipv6_sctp_offload_supported = true;
        hw->promisc_mode = HNS3_LIMIT_PROMISC_MODE;

        return 0;
}

static int
hns3vf_check_tqp_info(struct hns3_hw *hw)
{
        if (hw->tqps_num == 0) {
                PMD_INIT_LOG(ERR, "Get invalid tqps_num(0) from PF.");
                return -EINVAL;
        }

        if (hw->rss_size_max == 0) {
                PMD_INIT_LOG(ERR, "Get invalid rss_size_max(0) from PF.");
                return -EINVAL;
        }

        hw->tqps_num = RTE_MIN(hw->rss_size_max, hw->tqps_num);

        return 0;
}

static int
hns3vf_get_port_base_vlan_filter_state(struct hns3_hw *hw)
{
        uint8_t resp_msg;
        int ret;

        ret = hns3_send_mbx_msg(hw, HNS3_MBX_SET_VLAN,
                                HNS3_MBX_GET_PORT_BASE_VLAN_STATE, NULL, 0,
                                true, &resp_msg, sizeof(resp_msg));
        if (ret) {
                if (ret == -ETIME) {
                        /*
                         * Getting current port based VLAN state from PF driver
                         * will not affect VF driver's basic function. Because
                         * the VF driver relies on hns3 PF kernel ether driver,
                         * to avoid introducing compatibility issues with older
                         * version of PF driver, no failure will be returned
                         * when the return value is ETIME. This return value has
                         * the following scenarios:
                         * 1) Firmware didn't return the results in time
                         * 2) the result return by firmware is timeout
                         * 3) the older version of kernel side PF driver does
                         *    not support this mailbox message.
                         * For scenarios 1 and 2, it is most likely that a
                         * hardware error has occurred, or a hardware reset has
                         * occurred. In this case, these errors will be caught
                         * by other functions.
                         */
                        PMD_INIT_LOG(WARNING,
                                "failed to get PVID state for timeout, maybe "
                                "kernel side PF driver doesn't support this "
                                "mailbox message, or firmware didn't respond.");
                        resp_msg = HNS3_PORT_BASE_VLAN_DISABLE;
                } else {
                        PMD_INIT_LOG(ERR, "failed to get port based VLAN state,"
                                " ret = %d", ret);
                        return ret;
                }
        }
        hw->port_base_vlan_cfg.state = resp_msg ?
                HNS3_PORT_BASE_VLAN_ENABLE : HNS3_PORT_BASE_VLAN_DISABLE;
        return 0;
}

static int
hns3vf_get_queue_info(struct hns3_hw *hw)
{
#define HNS3VF_TQPS_RSS_INFO_LEN        6
        uint8_t resp_msg[HNS3VF_TQPS_RSS_INFO_LEN];
        int ret;

        ret = hns3_send_mbx_msg(hw, HNS3_MBX_GET_QINFO, 0, NULL, 0, true,
                                resp_msg, HNS3VF_TQPS_RSS_INFO_LEN);
        if (ret) {
                PMD_INIT_LOG(ERR, "Failed to get tqp info from PF: %d", ret);
                return ret;
        }

        memcpy(&hw->tqps_num, &resp_msg[0], sizeof(uint16_t));
        memcpy(&hw->rss_size_max, &resp_msg[2], sizeof(uint16_t));

        return hns3vf_check_tqp_info(hw);
}

static int
hns3vf_get_queue_depth(struct hns3_hw *hw)
{
#define HNS3VF_TQPS_DEPTH_INFO_LEN      4
        uint8_t resp_msg[HNS3VF_TQPS_DEPTH_INFO_LEN];
        int ret;

        ret = hns3_send_mbx_msg(hw, HNS3_MBX_GET_QDEPTH, 0, NULL, 0, true,
                                resp_msg, HNS3VF_TQPS_DEPTH_INFO_LEN);
        if (ret) {
                PMD_INIT_LOG(ERR, "Failed to get tqp depth info from PF: %d",
                             ret);
                return ret;
        }

        memcpy(&hw->num_tx_desc, &resp_msg[0], sizeof(uint16_t));
        memcpy(&hw->num_rx_desc, &resp_msg[2], sizeof(uint16_t));

        return 0;
}

static void
hns3vf_update_caps(struct hns3_hw *hw, uint32_t caps)
{
        if (hns3_get_bit(caps, HNS3VF_CAPS_VLAN_FLT_MOD_B))
                hns3_set_bit(hw->capability,
                                HNS3_DEV_SUPPORT_VF_VLAN_FLT_MOD_B, 1);
}

static int
hns3vf_get_num_tc(struct hns3_hw *hw)
{
        uint8_t num_tc = 0;
        uint32_t i;

        for (i = 0; i < HNS3_MAX_TC_NUM; i++) {
                if (hw->hw_tc_map & BIT(i))
                        num_tc++;
        }
        return num_tc;
}

static int
hns3vf_get_basic_info(struct hns3_hw *hw)
{
        uint8_t resp_msg[HNS3_MBX_MAX_RESP_DATA_SIZE];
        struct hns3_basic_info *basic_info;
        int ret;

        ret = hns3_send_mbx_msg(hw, HNS3_MBX_GET_BASIC_INFO, 0, NULL, 0,
                                true, resp_msg, sizeof(resp_msg));
        if (ret) {
                hns3_err(hw, "failed to get basic info from PF, ret = %d.",
                                ret);
                return ret;
        }

        basic_info = (struct hns3_basic_info *)resp_msg;
        hw->hw_tc_map = basic_info->hw_tc_map;
        hw->num_tc = hns3vf_get_num_tc(hw);
        hw->pf_vf_if_version = basic_info->pf_vf_if_version;
        hns3vf_update_caps(hw, basic_info->caps);

        return 0;
}

static int
hns3vf_get_host_mac_addr(struct hns3_hw *hw)
{
        uint8_t host_mac[RTE_ETHER_ADDR_LEN];
        int ret;

        ret = hns3_send_mbx_msg(hw, HNS3_MBX_GET_MAC_ADDR, 0, NULL, 0,
                                true, host_mac, RTE_ETHER_ADDR_LEN);
        if (ret) {
                hns3_err(hw, "Failed to get mac addr from PF: %d", ret);
                return ret;
        }

        memcpy(hw->mac.mac_addr, host_mac, RTE_ETHER_ADDR_LEN);

        return 0;
}

static int
hns3vf_get_configuration(struct hns3_hw *hw)
{
        int ret;

        hw->mac.media_type = HNS3_MEDIA_TYPE_NONE;
        hw->rss_dis_flag = false;

        /* Get device capability */
        ret = hns3vf_get_capability(hw);
        if (ret) {
                PMD_INIT_LOG(ERR, "failed to get device capability: %d.", ret);
                return ret;
        }

        hns3vf_get_push_lsc_cap(hw);

        /* Get basic info from PF */
        ret = hns3vf_get_basic_info(hw);
        if (ret)
                return ret;

        /* Get queue configuration from PF */
        ret = hns3vf_get_queue_info(hw);
        if (ret)
                return ret;

        /* Get queue depth info from PF */
        ret = hns3vf_get_queue_depth(hw);
        if (ret)
                return ret;

        /* Get user defined VF MAC addr from PF */
        ret = hns3vf_get_host_mac_addr(hw);
        if (ret)
                return ret;

        return hns3vf_get_port_base_vlan_filter_state(hw);
}

static int
hns3vf_set_tc_queue_mapping(struct hns3_adapter *hns, uint16_t nb_rx_q,
                            uint16_t nb_tx_q)
{
        struct hns3_hw *hw = &hns->hw;

        return hns3_queue_to_tc_mapping(hw, nb_rx_q, nb_tx_q);
}

static void
hns3vf_request_link_info(struct hns3_hw *hw)
{
        struct hns3_vf *vf = HNS3_DEV_HW_TO_VF(hw);
        bool send_req;
        int ret;

        if (__atomic_load_n(&hw->reset.resetting, __ATOMIC_RELAXED))
                return;

        send_req = vf->pf_push_lsc_cap == HNS3_PF_PUSH_LSC_CAP_NOT_SUPPORTED ||
                   vf->req_link_info_cnt > 0;
        if (!send_req)
                return;

        ret = hns3_send_mbx_msg(hw, HNS3_MBX_GET_LINK_STATUS, 0, NULL, 0, false,
                                NULL, 0);
        if (ret) {
                hns3_err(hw, "failed to fetch link status, ret = %d", ret);
                return;
        }

        if (vf->req_link_info_cnt > 0)
                vf->req_link_info_cnt--;
}

void
hns3vf_update_link_status(struct hns3_hw *hw, uint8_t link_status,
                          uint32_t link_speed, uint8_t link_duplex)
{
        struct rte_eth_dev *dev = &rte_eth_devices[hw->data->port_id];
        struct hns3_vf *vf = HNS3_DEV_HW_TO_VF(hw);
        struct hns3_mac *mac = &hw->mac;
        int ret;

        /*
         * PF kernel driver may push link status when VF driver is in resetting,
         * driver will stop polling job in this case, after resetting done
         * driver will start polling job again.
         * When polling job started, driver will get initial link status by
         * sending request to PF kernel driver, then could update link status by
         * process PF kernel driver's link status mailbox message.
         */
        if (!__atomic_load_n(&vf->poll_job_started, __ATOMIC_RELAXED))
                return;

        if (hw->adapter_state != HNS3_NIC_STARTED)
                return;

        mac->link_status = link_status;
        mac->link_speed = link_speed;
        mac->link_duplex = link_duplex;
        ret = hns3vf_dev_link_update(dev, 0);
        if (ret == 0 && dev->data->dev_conf.intr_conf.lsc != 0)
                hns3_start_report_lse(dev);
}

static int
hns3vf_vlan_filter_configure(struct hns3_adapter *hns, uint16_t vlan_id, int on)
{
#define HNS3VF_VLAN_MBX_MSG_LEN 5
        struct hns3_hw *hw = &hns->hw;
        uint8_t msg_data[HNS3VF_VLAN_MBX_MSG_LEN];
        uint16_t proto = htons(RTE_ETHER_TYPE_VLAN);
        uint8_t is_kill = on ? 0 : 1;

        msg_data[0] = is_kill;
        memcpy(&msg_data[1], &vlan_id, sizeof(vlan_id));
        memcpy(&msg_data[3], &proto, sizeof(proto));

        return hns3_send_mbx_msg(hw, HNS3_MBX_SET_VLAN, HNS3_MBX_VLAN_FILTER,
                                 msg_data, HNS3VF_VLAN_MBX_MSG_LEN, true, NULL,
                                 0);
}

static int
hns3vf_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
{
        struct hns3_adapter *hns = dev->data->dev_private;
        struct hns3_hw *hw = &hns->hw;
        int ret;

        if (__atomic_load_n(&hw->reset.resetting, __ATOMIC_RELAXED)) {
                hns3_err(hw,
                         "vf set vlan id failed during resetting, vlan_id =%u",
                         vlan_id);
                return -EIO;
        }
        rte_spinlock_lock(&hw->lock);
        ret = hns3vf_vlan_filter_configure(hns, vlan_id, on);
        rte_spinlock_unlock(&hw->lock);
        if (ret)
                hns3_err(hw, "vf set vlan id failed, vlan_id =%u, ret =%d",
                         vlan_id, ret);

        return ret;
}

static int
hns3vf_en_vlan_filter(struct hns3_hw *hw, bool enable)
{
        uint8_t msg_data;
        int ret;

        if (!hns3_dev_get_support(hw, VF_VLAN_FLT_MOD))
                return 0;

        msg_data = enable ? 1 : 0;
        ret = hns3_send_mbx_msg(hw, HNS3_MBX_SET_VLAN,
                        HNS3_MBX_ENABLE_VLAN_FILTER, &msg_data,
                        sizeof(msg_data), true, NULL, 0);
        if (ret)
                hns3_err(hw, "%s vlan filter failed, ret = %d.",
                                enable ? "enable" : "disable", ret);

        return ret;
}

static int
hns3vf_en_hw_strip_rxvtag(struct hns3_hw *hw, bool enable)
{
        uint8_t msg_data;
        int ret;

        msg_data = enable ? 1 : 0;
        ret = hns3_send_mbx_msg(hw, HNS3_MBX_SET_VLAN, HNS3_MBX_VLAN_RX_OFF_CFG,
                                &msg_data, sizeof(msg_data), false, NULL, 0);
        if (ret)
                hns3_err(hw, "vf %s strip failed, ret = %d.",
                                enable ? "enable" : "disable", ret);

        return ret;
}

static int
hns3vf_vlan_offload_set(struct rte_eth_dev *dev, int mask)
{
        struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
        struct rte_eth_conf *dev_conf = &dev->data->dev_conf;
        unsigned int tmp_mask;
        int ret = 0;

        if (__atomic_load_n(&hw->reset.resetting, __ATOMIC_RELAXED)) {
                hns3_err(hw, "vf set vlan offload failed during resetting, "
                             "mask = 0x%x", mask);
                return -EIO;
        }

        tmp_mask = (unsigned int)mask;

        if (tmp_mask & RTE_ETH_VLAN_FILTER_MASK) {
                rte_spinlock_lock(&hw->lock);
                /* Enable or disable VLAN filter */
                if (dev_conf->rxmode.offloads & RTE_ETH_RX_OFFLOAD_VLAN_FILTER)
                        ret = hns3vf_en_vlan_filter(hw, true);
                else
                        ret = hns3vf_en_vlan_filter(hw, false);
                rte_spinlock_unlock(&hw->lock);
                if (ret)
                        return ret;
        }

        /* Vlan stripping setting */
        if (tmp_mask & RTE_ETH_VLAN_STRIP_MASK) {
                rte_spinlock_lock(&hw->lock);
                /* Enable or disable VLAN stripping */
                if (dev_conf->rxmode.offloads & RTE_ETH_RX_OFFLOAD_VLAN_STRIP)
                        ret = hns3vf_en_hw_strip_rxvtag(hw, true);
                else
                        ret = hns3vf_en_hw_strip_rxvtag(hw, false);
                rte_spinlock_unlock(&hw->lock);
        }

        return ret;
}

static int
hns3vf_handle_all_vlan_table(struct hns3_adapter *hns, int on)
{
        struct rte_vlan_filter_conf *vfc;
        struct hns3_hw *hw = &hns->hw;
        uint16_t vlan_id;
        uint64_t vbit;
        uint64_t ids;
        int ret = 0;
        uint32_t i;

        vfc = &hw->data->vlan_filter_conf;
        for (i = 0; i < RTE_DIM(vfc->ids); i++) {
                if (vfc->ids[i] == 0)
                        continue;
                ids = vfc->ids[i];
                while (ids) {
                        /*
                         * 64 means the num bits of ids, one bit corresponds to
                         * one vlan id
                         */
                        vlan_id = 64 * i;
                        /* count trailing zeroes */
                        vbit = ~ids & (ids - 1);
                        /* clear least significant bit set */
                        ids ^= (ids ^ (ids - 1)) ^ vbit;
                        for (; vbit;) {
                                vbit >>= 1;
                                vlan_id++;
                        }
                        ret = hns3vf_vlan_filter_configure(hns, vlan_id, on);
                        if (ret) {
                                hns3_err(hw,
                                         "VF handle vlan table failed, ret =%d, on = %d",
                                         ret, on);
                                return ret;
                        }
                }
        }

        return ret;
}

static int
hns3vf_remove_all_vlan_table(struct hns3_adapter *hns)
{
        return hns3vf_handle_all_vlan_table(hns, 0);
}

static int
hns3vf_restore_vlan_conf(struct hns3_adapter *hns)
{
        struct hns3_hw *hw = &hns->hw;
        struct rte_eth_conf *dev_conf;
        bool en;
        int ret;

        dev_conf = &hw->data->dev_conf;
        en = dev_conf->rxmode.offloads & RTE_ETH_RX_OFFLOAD_VLAN_STRIP ? true
                                                                   : false;
        ret = hns3vf_en_hw_strip_rxvtag(hw, en);
        if (ret)
                hns3_err(hw, "VF restore vlan conf fail, en =%d, ret =%d", en,
                         ret);
        return ret;
}

static int
hns3vf_dev_configure_vlan(struct rte_eth_dev *dev)
{
        struct hns3_adapter *hns = dev->data->dev_private;
        struct rte_eth_dev_data *data = dev->data;
        struct hns3_hw *hw = &hns->hw;
        int ret;

        if (data->dev_conf.txmode.hw_vlan_reject_tagged ||
            data->dev_conf.txmode.hw_vlan_reject_untagged ||
            data->dev_conf.txmode.hw_vlan_insert_pvid) {
                hns3_warn(hw, "hw_vlan_reject_tagged, hw_vlan_reject_untagged "
                              "or hw_vlan_insert_pvid is not support!");
        }

        /* Apply vlan offload setting */
        ret = hns3vf_vlan_offload_set(dev, RTE_ETH_VLAN_STRIP_MASK |
                                        RTE_ETH_VLAN_FILTER_MASK);
        if (ret)
                hns3_err(hw, "dev config vlan offload failed, ret = %d.", ret);

        return ret;
}

static int
hns3vf_set_alive(struct hns3_hw *hw, bool alive)
{
        uint8_t msg_data;

        msg_data = alive ? 1 : 0;
        return hns3_send_mbx_msg(hw, HNS3_MBX_SET_ALIVE, 0, &msg_data,
                                 sizeof(msg_data), false, NULL, 0);
}

static void
hns3vf_keep_alive_handler(void *param)
{
        struct rte_eth_dev *eth_dev = (struct rte_eth_dev *)param;
        struct hns3_adapter *hns = eth_dev->data->dev_private;
        struct hns3_hw *hw = &hns->hw;
        int ret;

        ret = hns3_send_mbx_msg(hw, HNS3_MBX_KEEP_ALIVE, 0, NULL, 0,
                                false, NULL, 0);
        if (ret)
                hns3_err(hw, "VF sends keeping alive cmd failed(=%d)",
                         ret);

        rte_eal_alarm_set(HNS3VF_KEEP_ALIVE_INTERVAL, hns3vf_keep_alive_handler,
                          eth_dev);
}

static void
hns3vf_service_handler(void *param)
{
        struct rte_eth_dev *eth_dev = (struct rte_eth_dev *)param;
        struct hns3_adapter *hns = eth_dev->data->dev_private;
        struct hns3_hw *hw = &hns->hw;

        /*
         * The query link status and reset processing are executed in the
         * interrupt thread. When the IMP reset occurs, IMP will not respond,
         * and the query operation will timeout after 30ms. In the case of
         * multiple PF/VFs, each query failure timeout causes the IMP reset
         * interrupt to fail to respond within 100ms.
         * Before querying the link status, check whether there is a reset
         * pending, and if so, abandon the query.
         */
        if (!hns3vf_is_reset_pending(hns))
                hns3vf_request_link_info(hw);
        else
                hns3_warn(hw, "Cancel the query when reset is pending");

        rte_eal_alarm_set(HNS3VF_SERVICE_INTERVAL, hns3vf_service_handler,
                          eth_dev);
}

static void
hns3vf_start_poll_job(struct rte_eth_dev *dev)
{
#define HNS3_REQUEST_LINK_INFO_REMAINS_CNT      3

        struct hns3_vf *vf = HNS3_DEV_PRIVATE_TO_VF(dev->data->dev_private);

        if (vf->pf_push_lsc_cap == HNS3_PF_PUSH_LSC_CAP_SUPPORTED)
                vf->req_link_info_cnt = HNS3_REQUEST_LINK_INFO_REMAINS_CNT;

        __atomic_store_n(&vf->poll_job_started, 1, __ATOMIC_RELAXED);

        hns3vf_service_handler(dev);
}

static void
hns3vf_stop_poll_job(struct rte_eth_dev *dev)
{
        struct hns3_vf *vf = HNS3_DEV_PRIVATE_TO_VF(dev->data->dev_private);

        rte_eal_alarm_cancel(hns3vf_service_handler, dev);

        __atomic_store_n(&vf->poll_job_started, 0, __ATOMIC_RELAXED);
}

static int
hns3_query_vf_resource(struct hns3_hw *hw)
{
        struct hns3_vf_res_cmd *req;
        struct hns3_cmd_desc desc;
        uint16_t num_msi;
        int ret;

        hns3_cmd_setup_basic_desc(&desc, HNS3_OPC_QUERY_VF_RSRC, true);
        ret = hns3_cmd_send(hw, &desc, 1);
        if (ret) {
                hns3_err(hw, "query vf resource failed, ret = %d", ret);
                return ret;
        }

        req = (struct hns3_vf_res_cmd *)desc.data;
        num_msi = hns3_get_field(rte_le_to_cpu_16(req->vf_intr_vector_number),
                                 HNS3_VF_VEC_NUM_M, HNS3_VF_VEC_NUM_S);
        if (num_msi < HNS3_MIN_VECTOR_NUM) {
                hns3_err(hw, "Just %u msi resources, not enough for vf(min:%d)",
                         num_msi, HNS3_MIN_VECTOR_NUM);
                return -EINVAL;
        }

        hw->num_msi = num_msi;

        return 0;
}

static int
hns3vf_init_hardware(struct hns3_adapter *hns)
{
        struct hns3_hw *hw = &hns->hw;
        uint16_t mtu = hw->data->mtu;
        int ret;

        ret = hns3vf_set_promisc_mode(hw, true, false, false);
        if (ret)
                return ret;

        ret = hns3vf_config_mtu(hw, mtu);
        if (ret)
                goto err_init_hardware;

        ret = hns3vf_vlan_filter_configure(hns, 0, 1);
        if (ret) {
                PMD_INIT_LOG(ERR, "Failed to initialize VLAN config: %d", ret);
                goto err_init_hardware;
        }

        ret = hns3_config_gro(hw, false);
        if (ret) {
                PMD_INIT_LOG(ERR, "Failed to config gro: %d", ret);
                goto err_init_hardware;
        }

        /*
         * In the initialization clearing the all hardware mapping relationship
         * configurations between queues and interrupt vectors is needed, so
         * some error caused by the residual configurations, such as the
         * unexpected interrupt, can be avoid.
         */
        ret = hns3_init_ring_with_vector(hw);
        if (ret) {
                PMD_INIT_LOG(ERR, "Failed to init ring intr vector: %d", ret);
                goto err_init_hardware;
        }

        return 0;

err_init_hardware:
        (void)hns3vf_set_promisc_mode(hw, false, false, false);
        return ret;
}

static int
hns3vf_clear_vport_list(struct hns3_hw *hw)
{
        return hns3_send_mbx_msg(hw, HNS3_MBX_HANDLE_VF_TBL,
                                 HNS3_MBX_VPORT_LIST_CLEAR, NULL, 0, false,
                                 NULL, 0);
}

static int
hns3vf_init_vf(struct rte_eth_dev *eth_dev)
{
        struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
        struct hns3_adapter *hns = eth_dev->data->dev_private;
        struct hns3_hw *hw = &hns->hw;
        int ret;

        PMD_INIT_FUNC_TRACE();

        /* Get hardware io base address from pcie BAR2 IO space */
        hw->io_base = pci_dev->mem_resource[2].addr;

        /* Firmware command queue initialize */
        ret = hns3_cmd_init_queue(hw);
        if (ret) {
                PMD_INIT_LOG(ERR, "Failed to init cmd queue: %d", ret);
                goto err_cmd_init_queue;
        }

        /* Firmware command initialize */
        ret = hns3_cmd_init(hw);
        if (ret) {
                PMD_INIT_LOG(ERR, "Failed to init cmd: %d", ret);
                goto err_cmd_init;
        }

        hns3_tx_push_init(eth_dev);

        /* Get VF resource */
        ret = hns3_query_vf_resource(hw);
        if (ret)
                goto err_cmd_init;

        rte_spinlock_init(&hw->mbx_resp.lock);

        hns3vf_clear_event_cause(hw, 0);

        ret = rte_intr_callback_register(pci_dev->intr_handle,
                                         hns3vf_interrupt_handler, eth_dev);
        if (ret) {
                PMD_INIT_LOG(ERR, "Failed to register intr: %d", ret);
                goto err_intr_callback_register;
        }

        /* Enable interrupt */
        rte_intr_enable(pci_dev->intr_handle);
        hns3vf_enable_irq0(hw);

        /* Get configuration from PF */
        ret = hns3vf_get_configuration(hw);
        if (ret) {
                PMD_INIT_LOG(ERR, "Failed to fetch configuration: %d", ret);
                goto err_get_config;
        }

        ret = hns3_tqp_stats_init(hw);
        if (ret)
                goto err_get_config;

        /* Hardware statistics of imissed registers cleared. */
        ret = hns3_update_imissed_stats(hw, true);
        if (ret) {
                hns3_err(hw, "clear imissed stats failed, ret = %d", ret);
                goto err_set_tc_queue;
        }

        ret = hns3vf_set_tc_queue_mapping(hns, hw->tqps_num, hw->tqps_num);
        if (ret) {
                PMD_INIT_LOG(ERR, "failed to set tc info, ret = %d.", ret);
                goto err_set_tc_queue;
        }

        ret = hns3vf_clear_vport_list(hw);
        if (ret) {
                PMD_INIT_LOG(ERR, "Failed to clear tbl list: %d", ret);
                goto err_set_tc_queue;
        }

        ret = hns3vf_init_hardware(hns);
        if (ret)
                goto err_set_tc_queue;

        hns3_rss_set_default_args(hw);

        ret = hns3vf_set_alive(hw, true);
        if (ret) {
                PMD_INIT_LOG(ERR, "Failed to VF send alive to PF: %d", ret);
                goto err_set_tc_queue;
        }

        return 0;

err_set_tc_queue:
        hns3_tqp_stats_uninit(hw);

err_get_config:
        hns3vf_disable_irq0(hw);
        rte_intr_disable(pci_dev->intr_handle);
        hns3_intr_unregister(pci_dev->intr_handle, hns3vf_interrupt_handler,
                             eth_dev);
err_intr_callback_register:
err_cmd_init:
        hns3_cmd_uninit(hw);
        hns3_cmd_destroy_queue(hw);
err_cmd_init_queue:
        hw->io_base = NULL;

        return ret;
}

static void
hns3vf_uninit_vf(struct rte_eth_dev *eth_dev)
{
        struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
        struct hns3_adapter *hns = eth_dev->data->dev_private;
        struct hns3_hw *hw = &hns->hw;

        PMD_INIT_FUNC_TRACE();

        hns3_rss_uninit(hns);
        (void)hns3_config_gro(hw, false);
        (void)hns3vf_set_alive(hw, false);
        (void)hns3vf_set_promisc_mode(hw, false, false, false);
        hns3_flow_uninit(eth_dev);
        hns3_tqp_stats_uninit(hw);
        hns3vf_disable_irq0(hw);
        rte_intr_disable(pci_dev->intr_handle);
        hns3_intr_unregister(pci_dev->intr_handle, hns3vf_interrupt_handler,
                             eth_dev);
        hns3_cmd_uninit(hw);
        hns3_cmd_destroy_queue(hw);
        hw->io_base = NULL;
}

static int
hns3vf_do_stop(struct hns3_adapter *hns)
{
        struct hns3_hw *hw = &hns->hw;
        int ret;

        hw->mac.link_status = RTE_ETH_LINK_DOWN;

        /*
         * The "hns3vf_do_stop" function will also be called by .stop_service to
         * prepare reset. At the time of global or IMP reset, the command cannot
         * be sent to stop the tx/rx queues. The mbuf in Tx/Rx queues may be
         * accessed during the reset process. So the mbuf can not be released
         * during reset and is required to be released after the reset is
         * completed.
         */
        if (__atomic_load_n(&hw->reset.resetting,  __ATOMIC_RELAXED) == 0)
                hns3_dev_release_mbufs(hns);

        if (__atomic_load_n(&hw->reset.disable_cmd, __ATOMIC_RELAXED) == 0) {
                hns3_configure_all_mac_addr(hns, true);
                ret = hns3_reset_all_tqps(hns);
                if (ret) {
                        hns3_err(hw, "failed to reset all queues ret = %d",
                                 ret);
                        return ret;
                }
        }
        return 0;
}

static int
hns3vf_dev_stop(struct rte_eth_dev *dev)
{
        struct hns3_adapter *hns = dev->data->dev_private;
        struct hns3_hw *hw = &hns->hw;

        PMD_INIT_FUNC_TRACE();
        dev->data->dev_started = 0;

        hw->adapter_state = HNS3_NIC_STOPPING;
        hns3_set_rxtx_function(dev);
        rte_wmb();
        /* Disable datapath on secondary process. */
        hns3_mp_req_stop_rxtx(dev);
        /* Prevent crashes when queues are still in use. */
        rte_delay_ms(hw->cfg_max_queues);

        rte_spinlock_lock(&hw->lock);
        if (__atomic_load_n(&hw->reset.resetting, __ATOMIC_RELAXED) == 0) {
                hns3_stop_tqps(hw);
                hns3vf_do_stop(hns);
                hns3_unmap_rx_interrupt(dev);
                hw->adapter_state = HNS3_NIC_CONFIGURED;
        }
        hns3_rx_scattered_reset(dev);
        hns3vf_stop_poll_job(dev);
        hns3_stop_report_lse(dev);
        rte_spinlock_unlock(&hw->lock);

        return 0;
}

static int
hns3vf_dev_close(struct rte_eth_dev *eth_dev)
{
        struct hns3_adapter *hns = eth_dev->data->dev_private;
        struct hns3_hw *hw = &hns->hw;
        int ret = 0;

        if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
                hns3_mp_uninit(eth_dev);
                return 0;
        }

        if (hw->adapter_state == HNS3_NIC_STARTED)
                ret = hns3vf_dev_stop(eth_dev);

        hw->adapter_state = HNS3_NIC_CLOSING;
        hns3_reset_abort(hns);
        hw->adapter_state = HNS3_NIC_CLOSED;
        rte_eal_alarm_cancel(hns3vf_keep_alive_handler, eth_dev);
        hns3_configure_all_mc_mac_addr(hns, true);
        hns3vf_remove_all_vlan_table(hns);
        hns3vf_uninit_vf(eth_dev);
        hns3_free_all_queues(eth_dev);
        rte_free(hw->reset.wait_data);
        hns3_mp_uninit(eth_dev);
        hns3_warn(hw, "Close port %u finished", hw->data->port_id);

        return ret;
}

static int
hns3vf_dev_link_update(struct rte_eth_dev *eth_dev,
                       __rte_unused int wait_to_complete)
{
        struct hns3_adapter *hns = eth_dev->data->dev_private;
        struct hns3_hw *hw = &hns->hw;
        struct hns3_mac *mac = &hw->mac;
        struct rte_eth_link new_link;

        memset(&new_link, 0, sizeof(new_link));
        switch (mac->link_speed) {
        case RTE_ETH_SPEED_NUM_10M:
        case RTE_ETH_SPEED_NUM_100M:
        case RTE_ETH_SPEED_NUM_1G:
        case RTE_ETH_SPEED_NUM_10G:
        case RTE_ETH_SPEED_NUM_25G:
        case RTE_ETH_SPEED_NUM_40G:
        case RTE_ETH_SPEED_NUM_50G:
        case RTE_ETH_SPEED_NUM_100G:
        case RTE_ETH_SPEED_NUM_200G:
                if (mac->link_status)
                        new_link.link_speed = mac->link_speed;
                break;
        default:
                if (mac->link_status)
                        new_link.link_speed = RTE_ETH_SPEED_NUM_UNKNOWN;
                break;
        }

        if (!mac->link_status)
                new_link.link_speed = RTE_ETH_SPEED_NUM_NONE;

        new_link.link_duplex = mac->link_duplex;
        new_link.link_status = mac->link_status ? RTE_ETH_LINK_UP : RTE_ETH_LINK_DOWN;
        new_link.link_autoneg =
            !(eth_dev->data->dev_conf.link_speeds & RTE_ETH_LINK_SPEED_FIXED);

        return rte_eth_linkstatus_set(eth_dev, &new_link);
}

static int
hns3vf_do_start(struct hns3_adapter *hns, bool reset_queue)
{
        struct hns3_hw *hw = &hns->hw;
        uint16_t nb_rx_q = hw->data->nb_rx_queues;
        uint16_t nb_tx_q = hw->data->nb_tx_queues;
        int ret;

        ret = hns3vf_set_tc_queue_mapping(hns, nb_rx_q, nb_tx_q);
        if (ret)
                return ret;

        hns3_enable_rxd_adv_layout(hw);

        ret = hns3_init_queues(hns, reset_queue);
        if (ret)
                hns3_err(hw, "failed to init queues, ret = %d.", ret);

        return ret;
}

static void
hns3vf_restore_filter(struct rte_eth_dev *dev)
{
        hns3_restore_rss_filter(dev);
}

static int
hns3vf_dev_start(struct rte_eth_dev *dev)
{
        struct hns3_adapter *hns = dev->data->dev_private;
        struct hns3_hw *hw = &hns->hw;
        int ret;

        PMD_INIT_FUNC_TRACE();
        if (__atomic_load_n(&hw->reset.resetting, __ATOMIC_RELAXED))
                return -EBUSY;

        rte_spinlock_lock(&hw->lock);
        hw->adapter_state = HNS3_NIC_STARTING;
        ret = hns3vf_do_start(hns, true);
        if (ret) {
                hw->adapter_state = HNS3_NIC_CONFIGURED;
                rte_spinlock_unlock(&hw->lock);
                return ret;
        }
        ret = hns3_map_rx_interrupt(dev);
        if (ret)
                goto map_rx_inter_err;

        /*
         * There are three register used to control the status of a TQP
         * (contains a pair of Tx queue and Rx queue) in the new version network
         * engine. One is used to control the enabling of Tx queue, the other is
         * used to control the enabling of Rx queue, and the last is the master
         * switch used to control the enabling of the tqp. The Tx register and
         * TQP register must be enabled at the same time to enable a Tx queue.
         * The same applies to the Rx queue. For the older network enginem, this
         * function only refresh the enabled flag, and it is used to update the
         * status of queue in the dpdk framework.
         */
        ret = hns3_start_all_txqs(dev);
        if (ret)
                goto map_rx_inter_err;

        ret = hns3_start_all_rxqs(dev);
        if (ret)
                goto start_all_rxqs_fail;

        hw->adapter_state = HNS3_NIC_STARTED;
        rte_spinlock_unlock(&hw->lock);

        hns3_rx_scattered_calc(dev);
        hns3_set_rxtx_function(dev);
        hns3_mp_req_start_rxtx(dev);

        hns3vf_restore_filter(dev);

        /* Enable interrupt of all rx queues before enabling queues */
        hns3_dev_all_rx_queue_intr_enable(hw, true);
        hns3_start_tqps(hw);

        if (dev->data->dev_conf.intr_conf.lsc != 0)
                hns3vf_dev_link_update(dev, 0);
        hns3vf_start_poll_job(dev);

        return ret;

start_all_rxqs_fail:
        hns3_stop_all_txqs(dev);
map_rx_inter_err:
        (void)hns3vf_do_stop(hns);
        hw->adapter_state = HNS3_NIC_CONFIGURED;
        rte_spinlock_unlock(&hw->lock);

        return ret;
}

static bool
is_vf_reset_done(struct hns3_hw *hw)
{
#define HNS3_FUN_RST_ING_BITS \
        (BIT(HNS3_VECTOR0_GLOBALRESET_INT_B) | \
         BIT(HNS3_VECTOR0_CORERESET_INT_B) | \
         BIT(HNS3_VECTOR0_IMPRESET_INT_B) | \
         BIT(HNS3_VECTOR0_FUNCRESET_INT_B))

        uint32_t val;

        if (hw->reset.level == HNS3_VF_RESET) {
                val = hns3_read_dev(hw, HNS3_VF_RST_ING);
                if (val & HNS3_VF_RST_ING_BIT)
                        return false;
        } else {
                val = hns3_read_dev(hw, HNS3_FUN_RST_ING);
                if (val & HNS3_FUN_RST_ING_BITS)
                        return false;
        }
        return true;
}

bool
hns3vf_is_reset_pending(struct hns3_adapter *hns)
{
        struct hns3_hw *hw = &hns->hw;
        enum hns3_reset_level reset;

        /*
         * According to the protocol of PCIe, FLR to a PF device resets the PF
         * state as well as the SR-IOV extended capability including VF Enable
         * which means that VFs no longer exist.
         *
         * HNS3_VF_FULL_RESET means PF device is in FLR reset. when PF device
         * is in FLR stage, the register state of VF device is not reliable,
         * so register states detection can not be carried out. In this case,
         * we just ignore the register states and return false to indicate that
         * there are no other reset states that need to be processed by driver.
         */
        if (hw->reset.level == HNS3_VF_FULL_RESET)
                return false;

        /* Check the registers to confirm whether there is reset pending */
        hns3vf_check_event_cause(hns, NULL);
        reset = hns3vf_get_reset_level(hw, &hw->reset.pending);
        if (hw->reset.level != HNS3_NONE_RESET && reset != HNS3_NONE_RESET &&
            hw->reset.level < reset) {
                hns3_warn(hw, "High level reset %d is pending", reset);
                return true;
        }
        return false;
}

static int
hns3vf_wait_hardware_ready(struct hns3_adapter *hns)
{
        struct hns3_hw *hw = &hns->hw;
        struct hns3_wait_data *wait_data = hw->reset.wait_data;
        struct timeval tv;

        if (wait_data->result == HNS3_WAIT_SUCCESS) {
                /*
                 * After vf reset is ready, the PF may not have completed
                 * the reset processing. The vf sending mbox to PF may fail
                 * during the pf reset, so it is better to add extra delay.
                 */
                if (hw->reset.level == HNS3_VF_FUNC_RESET ||
                    hw->reset.level == HNS3_FLR_RESET)
                        return 0;
                /* Reset retry process, no need to add extra delay. */
                if (hw->reset.attempts)
                        return 0;
                if (wait_data->check_completion == NULL)
                        return 0;

                wait_data->check_completion = NULL;
                wait_data->interval = 1 * MSEC_PER_SEC * USEC_PER_MSEC;
                wait_data->count = 1;
                wait_data->result = HNS3_WAIT_REQUEST;
                rte_eal_alarm_set(wait_data->interval, hns3_wait_callback,
                                  wait_data);
                hns3_warn(hw, "hardware is ready, delay 1 sec for PF reset complete");
                return -EAGAIN;
        } else if (wait_data->result == HNS3_WAIT_TIMEOUT) {
                hns3_clock_gettime(&tv);
                hns3_warn(hw, "Reset step4 hardware not ready after reset time=%ld.%.6ld",
                          tv.tv_sec, tv.tv_usec);
                return -ETIME;
        } else if (wait_data->result == HNS3_WAIT_REQUEST)
                return -EAGAIN;

        wait_data->hns = hns;
        wait_data->check_completion = is_vf_reset_done;
        wait_data->end_ms = (uint64_t)HNS3VF_RESET_WAIT_CNT *
                                HNS3VF_RESET_WAIT_MS + hns3_clock_gettime_ms();
        wait_data->interval = HNS3VF_RESET_WAIT_MS * USEC_PER_MSEC;
        wait_data->count = HNS3VF_RESET_WAIT_CNT;
        wait_data->result = HNS3_WAIT_REQUEST;
        rte_eal_alarm_set(wait_data->interval, hns3_wait_callback, wait_data);
        return -EAGAIN;
}

static int
hns3vf_prepare_reset(struct hns3_adapter *hns)
{
        struct hns3_hw *hw = &hns->hw;
        int ret;

        if (hw->reset.level == HNS3_VF_FUNC_RESET) {
                ret = hns3_send_mbx_msg(hw, HNS3_MBX_RESET, 0, NULL,
                                        0, true, NULL, 0);
                if (ret)
                        return ret;
        }
        __atomic_store_n(&hw->reset.disable_cmd, 1, __ATOMIC_RELAXED);

        return 0;
}

static int
hns3vf_stop_service(struct hns3_adapter *hns)
{
        struct hns3_hw *hw = &hns->hw;
        struct rte_eth_dev *eth_dev;

        eth_dev = &rte_eth_devices[hw->data->port_id];
        if (hw->adapter_state == HNS3_NIC_STARTED) {
                /*
                 * Make sure call update link status before hns3vf_stop_poll_job

                 * because update link status depend on polling job exist.
                 */
                hns3vf_update_link_status(hw, RTE_ETH_LINK_DOWN, hw->mac.link_speed,
                                          hw->mac.link_duplex);
                hns3vf_stop_poll_job(eth_dev);
        }
        hw->mac.link_status = RTE_ETH_LINK_DOWN;

        hns3_set_rxtx_function(eth_dev);
        rte_wmb();
        /* Disable datapath on secondary process. */
        hns3_mp_req_stop_rxtx(eth_dev);
        rte_delay_ms(hw->cfg_max_queues);

        rte_spinlock_lock(&hw->lock);
        if (hw->adapter_state == HNS3_NIC_STARTED ||
            hw->adapter_state == HNS3_NIC_STOPPING) {
                hns3_enable_all_queues(hw, false);
                hns3vf_do_stop(hns);
                hw->reset.mbuf_deferred_free = true;
        } else
                hw->reset.mbuf_deferred_free = false;

        /*
         * It is cumbersome for hardware to pick-and-choose entries for deletion
         * from table space. Hence, for function reset software intervention is
         * required to delete the entries.
         */
        if (__atomic_load_n(&hw->reset.disable_cmd, __ATOMIC_RELAXED) == 0)
                hns3_configure_all_mc_mac_addr(hns, true);
        rte_spinlock_unlock(&hw->lock);

        return 0;
}

static int
hns3vf_start_service(struct hns3_adapter *hns)
{
        struct hns3_hw *hw = &hns->hw;
        struct rte_eth_dev *eth_dev;

        eth_dev = &rte_eth_devices[hw->data->port_id];
        hns3_set_rxtx_function(eth_dev);
        hns3_mp_req_start_rxtx(eth_dev);
        if (hw->adapter_state == HNS3_NIC_STARTED) {
                hns3vf_start_poll_job(eth_dev);

                /* Enable interrupt of all rx queues before enabling queues */
                hns3_dev_all_rx_queue_intr_enable(hw, true);
                /*
                 * Enable state of each rxq and txq will be recovered after
                 * reset, so we need to restore them before enable all tqps;
                 */
                hns3_restore_tqp_enable_state(hw);
                /*
                 * When finished the initialization, enable queues to receive
                 * and transmit packets.
                 */
                hns3_enable_all_queues(hw, true);
        }

        return 0;
}

static int
hns3vf_check_default_mac_change(struct hns3_hw *hw)
{
        char mac_str[RTE_ETHER_ADDR_FMT_SIZE];
        struct rte_ether_addr *hw_mac;
        int ret;

        /*
         * The hns3 PF ethdev driver in kernel support setting VF MAC address
         * on the host by "ip link set ..." command. If the hns3 PF kernel
         * ethdev driver sets the MAC address for VF device after the
         * initialization of the related VF device, the PF driver will notify
         * VF driver to reset VF device to make the new MAC address effective
         * immediately. The hns3 VF PMD should check whether the MAC
         * address has been changed by the PF kernel ethdev driver, if changed
         * VF driver should configure hardware using the new MAC address in the
         * recovering hardware configuration stage of the reset process.
         */
        ret = hns3vf_get_host_mac_addr(hw);
        if (ret)
                return ret;

        hw_mac = (struct rte_ether_addr *)hw->mac.mac_addr;
        ret = rte_is_zero_ether_addr(hw_mac);
        if (ret) {
                rte_ether_addr_copy(&hw->data->mac_addrs[0], hw_mac);
        } else {
                ret = rte_is_same_ether_addr(&hw->data->mac_addrs[0], hw_mac);
                if (!ret) {
                        rte_ether_addr_copy(hw_mac, &hw->data->mac_addrs[0]);
                        hns3_ether_format_addr(mac_str, RTE_ETHER_ADDR_FMT_SIZE,
                                              &hw->data->mac_addrs[0]);
                        hns3_warn(hw, "Default MAC address has been changed to:"
                                  " %s by the host PF kernel ethdev driver",
                                  mac_str);
                }
        }

        return 0;
}

static int
hns3vf_restore_conf(struct hns3_adapter *hns)
{
        struct hns3_hw *hw = &hns->hw;
        int ret;

        ret = hns3vf_check_default_mac_change(hw);
        if (ret)
                return ret;

        ret = hns3_configure_all_mac_addr(hns, false);
        if (ret)
                return ret;

        ret = hns3_configure_all_mc_mac_addr(hns, false);
        if (ret)
                goto err_mc_mac;

        ret = hns3vf_restore_promisc(hns);
        if (ret)
                goto err_vlan_table;

        ret = hns3vf_restore_vlan_conf(hns);
        if (ret)
                goto err_vlan_table;

        ret = hns3vf_get_port_base_vlan_filter_state(hw);
        if (ret)
                goto err_vlan_table;

        ret = hns3_restore_rx_interrupt(hw);
        if (ret)
                goto err_vlan_table;

        ret = hns3_restore_gro_conf(hw);
        if (ret)
                goto err_vlan_table;

        if (hw->adapter_state == HNS3_NIC_STARTED) {
                ret = hns3vf_do_start(hns, false);
                if (ret)
                        goto err_vlan_table;
                hns3_info(hw, "hns3vf dev restart successful!");
        } else if (hw->adapter_state == HNS3_NIC_STOPPING)
                hw->adapter_state = HNS3_NIC_CONFIGURED;

        ret = hns3vf_set_alive(hw, true);
        if (ret) {
                hns3_err(hw, "failed to VF send alive to PF: %d", ret);
                goto err_vlan_table;
        }

        return 0;

err_vlan_table:
        hns3_configure_all_mc_mac_addr(hns, true);
err_mc_mac:
        hns3_configure_all_mac_addr(hns, true);
        return ret;
}

static enum hns3_reset_level
hns3vf_get_reset_level(struct hns3_hw *hw, uint64_t *levels)
{
        enum hns3_reset_level reset_level;

        /* return the highest priority reset level amongst all */
        if (hns3_atomic_test_bit(HNS3_VF_RESET, levels))
                reset_level = HNS3_VF_RESET;
        else if (hns3_atomic_test_bit(HNS3_VF_FULL_RESET, levels))
                reset_level = HNS3_VF_FULL_RESET;
        else if (hns3_atomic_test_bit(HNS3_VF_PF_FUNC_RESET, levels))
                reset_level = HNS3_VF_PF_FUNC_RESET;
        else if (hns3_atomic_test_bit(HNS3_VF_FUNC_RESET, levels))
                reset_level = HNS3_VF_FUNC_RESET;
        else if (hns3_atomic_test_bit(HNS3_FLR_RESET, levels))
                reset_level = HNS3_FLR_RESET;
        else
                reset_level = HNS3_NONE_RESET;

        if (hw->reset.level != HNS3_NONE_RESET && reset_level < hw->reset.level)
                return HNS3_NONE_RESET;

        return reset_level;
}

static void
hns3vf_reset_service(void *param)
{
        struct hns3_adapter *hns = (struct hns3_adapter *)param;
        struct hns3_hw *hw = &hns->hw;
        enum hns3_reset_level reset_level;
        struct timeval tv_delta;
        struct timeval tv_start;
        struct timeval tv;
        uint64_t msec;

        /*
         * The interrupt is not triggered within the delay time.
         * The interrupt may have been lost. It is necessary to handle
         * the interrupt to recover from the error.
         */
        if (__atomic_load_n(&hw->reset.schedule, __ATOMIC_RELAXED) ==
                            SCHEDULE_DEFERRED) {
                __atomic_store_n(&hw->reset.schedule, SCHEDULE_REQUESTED,
                                 __ATOMIC_RELAXED);
                hns3_err(hw, "Handling interrupts in delayed tasks");
                hns3vf_interrupt_handler(&rte_eth_devices[hw->data->port_id]);
                reset_level = hns3vf_get_reset_level(hw, &hw->reset.pending);
                if (reset_level == HNS3_NONE_RESET) {
                        hns3_err(hw, "No reset level is set, try global reset");
                        hns3_atomic_set_bit(HNS3_VF_RESET, &hw->reset.pending);
                }
        }
        __atomic_store_n(&hw->reset.schedule, SCHEDULE_NONE, __ATOMIC_RELAXED);

        /*
         * Hardware reset has been notified, we now have to poll & check if
         * hardware has actually completed the reset sequence.
         */
        reset_level = hns3vf_get_reset_level(hw, &hw->reset.pending);
        if (reset_level != HNS3_NONE_RESET) {
                hns3_clock_gettime(&tv_start);
                hns3_reset_process(hns, reset_level);
                hns3_clock_gettime(&tv);
                timersub(&tv, &tv_start, &tv_delta);
                msec = hns3_clock_calctime_ms(&tv_delta);
                if (msec > HNS3_RESET_PROCESS_MS)
                        hns3_err(hw, "%d handle long time delta %" PRIu64
                                 " ms time=%ld.%.6ld",
                                 hw->reset.level, msec, tv.tv_sec, tv.tv_usec);
        }
}

static int
hns3vf_reinit_dev(struct hns3_adapter *hns)
{
        struct rte_eth_dev *eth_dev = &rte_eth_devices[hns->hw.data->port_id];
        struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
        struct hns3_hw *hw = &hns->hw;
        int ret;

        if (hw->reset.level == HNS3_VF_FULL_RESET) {
                rte_intr_disable(pci_dev->intr_handle);
                ret = hns3vf_set_bus_master(pci_dev, true);
                if (ret < 0) {
                        hns3_err(hw, "failed to set pci bus, ret = %d", ret);
                        return ret;
                }
        }

        /* Firmware command initialize */
        ret = hns3_cmd_init(hw);
        if (ret) {
                hns3_err(hw, "Failed to init cmd: %d", ret);
                return ret;
        }

        if (hw->reset.level == HNS3_VF_FULL_RESET) {
                /*
                 * UIO enables msix by writing the pcie configuration space
                 * vfio_pci enables msix in rte_intr_enable.
                 */
                if (pci_dev->kdrv == RTE_PCI_KDRV_IGB_UIO ||
                    pci_dev->kdrv == RTE_PCI_KDRV_UIO_GENERIC) {
                        if (hns3vf_enable_msix(pci_dev, true))
                                hns3_err(hw, "Failed to enable msix");
                }

                rte_intr_enable(pci_dev->intr_handle);
        }

        ret = hns3_reset_all_tqps(hns);
        if (ret) {
                hns3_err(hw, "Failed to reset all queues: %d", ret);
                return ret;
        }

        ret = hns3vf_init_hardware(hns);
        if (ret) {
                hns3_err(hw, "Failed to init hardware: %d", ret);
                return ret;
        }

        return 0;
}

static const struct eth_dev_ops hns3vf_eth_dev_ops = {
        .dev_configure      = hns3vf_dev_configure,
        .dev_start          = hns3vf_dev_start,
        .dev_stop           = hns3vf_dev_stop,
        .dev_close          = hns3vf_dev_close,
        .mtu_set            = hns3vf_dev_mtu_set,
        .promiscuous_enable = hns3vf_dev_promiscuous_enable,
        .promiscuous_disable = hns3vf_dev_promiscuous_disable,
        .allmulticast_enable = hns3vf_dev_allmulticast_enable,
        .allmulticast_disable = hns3vf_dev_allmulticast_disable,
        .stats_get          = hns3_stats_get,
        .stats_reset        = hns3_stats_reset,
        .xstats_get         = hns3_dev_xstats_get,
        .xstats_get_names   = hns3_dev_xstats_get_names,
        .xstats_reset       = hns3_dev_xstats_reset,
        .xstats_get_by_id   = hns3_dev_xstats_get_by_id,
        .xstats_get_names_by_id = hns3_dev_xstats_get_names_by_id,
        .dev_infos_get      = hns3_dev_infos_get,
        .fw_version_get     = hns3_fw_version_get,
        .rx_queue_setup     = hns3_rx_queue_setup,
        .tx_queue_setup     = hns3_tx_queue_setup,
        .rx_queue_release   = hns3_dev_rx_queue_release,
        .tx_queue_release   = hns3_dev_tx_queue_release,
        .rx_queue_start     = hns3_dev_rx_queue_start,
        .rx_queue_stop      = hns3_dev_rx_queue_stop,
        .tx_queue_start     = hns3_dev_tx_queue_start,
        .tx_queue_stop      = hns3_dev_tx_queue_stop,
        .rx_queue_intr_enable   = hns3_dev_rx_queue_intr_enable,
        .rx_queue_intr_disable  = hns3_dev_rx_queue_intr_disable,
        .rxq_info_get       = hns3_rxq_info_get,
        .txq_info_get       = hns3_txq_info_get,
        .rx_burst_mode_get  = hns3_rx_burst_mode_get,
        .tx_burst_mode_get  = hns3_tx_burst_mode_get,
        .mac_addr_add       = hns3_add_mac_addr,
        .mac_addr_remove    = hns3_remove_mac_addr,
        .mac_addr_set       = hns3vf_set_default_mac_addr,
        .set_mc_addr_list   = hns3_set_mc_mac_addr_list,
        .link_update        = hns3vf_dev_link_update,
        .rss_hash_update    = hns3_dev_rss_hash_update,
        .rss_hash_conf_get  = hns3_dev_rss_hash_conf_get,
        .reta_update        = hns3_dev_rss_reta_update,
        .reta_query         = hns3_dev_rss_reta_query,
        .flow_ops_get       = hns3_dev_flow_ops_get,
        .vlan_filter_set    = hns3vf_vlan_filter_set,
        .vlan_offload_set   = hns3vf_vlan_offload_set,
        .get_reg            = hns3_get_regs,
        .dev_supported_ptypes_get = hns3_dev_supported_ptypes_get,
        .tx_done_cleanup    = hns3_tx_done_cleanup,
};

static const struct hns3_reset_ops hns3vf_reset_ops = {
        .reset_service       = hns3vf_reset_service,
        .stop_service        = hns3vf_stop_service,
        .prepare_reset       = hns3vf_prepare_reset,
        .wait_hardware_ready = hns3vf_wait_hardware_ready,
        .reinit_dev          = hns3vf_reinit_dev,
        .restore_conf        = hns3vf_restore_conf,
        .start_service       = hns3vf_start_service,
};

static void
hns3vf_init_hw_ops(struct hns3_hw *hw)
{
        hw->ops.add_mc_mac_addr = hns3vf_add_mc_mac_addr;
        hw->ops.del_mc_mac_addr = hns3vf_remove_mc_mac_addr;
        hw->ops.add_uc_mac_addr = hns3vf_add_uc_mac_addr;
        hw->ops.del_uc_mac_addr = hns3vf_remove_uc_mac_addr;
        hw->ops.bind_ring_with_vector = hns3vf_bind_ring_with_vector;
}

static int
hns3vf_dev_init(struct rte_eth_dev *eth_dev)
{
        struct hns3_adapter *hns = eth_dev->data->dev_private;
        struct hns3_hw *hw = &hns->hw;
        int ret;

        PMD_INIT_FUNC_TRACE();

        hns3_flow_init(eth_dev);

        hns3_set_rxtx_function(eth_dev);
        eth_dev->dev_ops = &hns3vf_eth_dev_ops;
        eth_dev->rx_queue_count = hns3_rx_queue_count;
        ret = hns3_mp_init(eth_dev);
        if (ret)
                goto err_mp_init;

        if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
                hns3_tx_push_init(eth_dev);
                return 0;
        }

        hw->adapter_state = HNS3_NIC_UNINITIALIZED;
        hns->is_vf = true;
        hw->data = eth_dev->data;
        hns3_parse_devargs(eth_dev);

        ret = hns3_reset_init(hw);
        if (ret)
                goto err_init_reset;
        hw->reset.ops = &hns3vf_reset_ops;

        hns3vf_init_hw_ops(hw);
        ret = hns3vf_init_vf(eth_dev);
        if (ret) {
                PMD_INIT_LOG(ERR, "Failed to init vf: %d", ret);
                goto err_init_vf;
        }

        /* Allocate memory for storing MAC addresses */
        eth_dev->data->mac_addrs = rte_zmalloc("hns3vf-mac",
                                               sizeof(struct rte_ether_addr) *
                                               HNS3_VF_UC_MACADDR_NUM, 0);
        if (eth_dev->data->mac_addrs == NULL) {
                PMD_INIT_LOG(ERR, "Failed to allocate %zx bytes needed "
                             "to store MAC addresses",
                             sizeof(struct rte_ether_addr) *
                             HNS3_VF_UC_MACADDR_NUM);
                ret = -ENOMEM;
                goto err_rte_zmalloc;
        }

        /*
         * The hns3 PF ethdev driver in kernel support setting VF MAC address
         * on the host by "ip link set ..." command. To avoid some incorrect
         * scenes, for example, hns3 VF PMD fails to receive and send
         * packets after user configure the MAC address by using the
         * "ip link set ..." command, hns3 VF PMD keep the same MAC
         * address strategy as the hns3 kernel ethdev driver in the
         * initialization. If user configure a MAC address by the ip command
         * for VF device, then hns3 VF PMD will start with it, otherwise
         * start with a random MAC address in the initialization.
         */
        if (rte_is_zero_ether_addr((struct rte_ether_addr *)hw->mac.mac_addr))
                rte_eth_random_addr(hw->mac.mac_addr);
        rte_ether_addr_copy((struct rte_ether_addr *)hw->mac.mac_addr,
                            &eth_dev->data->mac_addrs[0]);

        hw->adapter_state = HNS3_NIC_INITIALIZED;

        if (__atomic_load_n(&hw->reset.schedule, __ATOMIC_RELAXED) ==
                            SCHEDULE_PENDING) {
                hns3_err(hw, "Reschedule reset service after dev_init");
                hns3_schedule_reset(hns);
        } else {
                /* IMP will wait ready flag before reset */
                hns3_notify_reset_ready(hw, false);
        }
        rte_eal_alarm_set(HNS3VF_KEEP_ALIVE_INTERVAL, hns3vf_keep_alive_handler,
                          eth_dev);
        return 0;

err_rte_zmalloc:
        hns3vf_uninit_vf(eth_dev);

err_init_vf:
        rte_free(hw->reset.wait_data);

err_init_reset:
        hns3_mp_uninit(eth_dev);

err_mp_init:
        eth_dev->dev_ops = NULL;
        eth_dev->rx_pkt_burst = NULL;
        eth_dev->rx_descriptor_status = NULL;
        eth_dev->tx_pkt_burst = NULL;
        eth_dev->tx_pkt_prepare = NULL;
        eth_dev->tx_descriptor_status = NULL;

        return ret;
}

static int
hns3vf_dev_uninit(struct rte_eth_dev *eth_dev)
{
        struct hns3_adapter *hns = eth_dev->data->dev_private;
        struct hns3_hw *hw = &hns->hw;

        PMD_INIT_FUNC_TRACE();

        if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
                __atomic_fetch_sub(&hw->secondary_cnt, 1, __ATOMIC_RELAXED);
                hns3_mp_uninit(eth_dev);
                return 0;
        }

        if (hw->adapter_state < HNS3_NIC_CLOSING)
                hns3vf_dev_close(eth_dev);

        hw->adapter_state = HNS3_NIC_REMOVED;
        return 0;
}

static int
eth_hns3vf_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
                     struct rte_pci_device *pci_dev)
{
        return rte_eth_dev_pci_generic_probe(pci_dev,
                                             sizeof(struct hns3_adapter),
                                             hns3vf_dev_init);
}

static int
eth_hns3vf_pci_remove(struct rte_pci_device *pci_dev)
{
        return rte_eth_dev_pci_generic_remove(pci_dev, hns3vf_dev_uninit);
}

static const struct rte_pci_id pci_id_hns3vf_map[] = {
        { RTE_PCI_DEVICE(PCI_VENDOR_ID_HUAWEI, HNS3_DEV_ID_100G_VF) },
        { RTE_PCI_DEVICE(PCI_VENDOR_ID_HUAWEI, HNS3_DEV_ID_100G_RDMA_PFC_VF) },
        { .vendor_id = 0, }, /* sentinel */
};

static struct rte_pci_driver rte_hns3vf_pmd = {
        .id_table = pci_id_hns3vf_map,
        .drv_flags = RTE_PCI_DRV_NEED_MAPPING | RTE_PCI_DRV_INTR_LSC,
        .probe = eth_hns3vf_pci_probe,
        .remove = eth_hns3vf_pci_remove,
};

RTE_PMD_REGISTER_PCI(net_hns3_vf, rte_hns3vf_pmd);
RTE_PMD_REGISTER_PCI_TABLE(net_hns3_vf, pci_id_hns3vf_map);
RTE_PMD_REGISTER_KMOD_DEP(net_hns3_vf, "* igb_uio | vfio-pci");
RTE_PMD_REGISTER_PARAM_STRING(net_hns3_vf,
                HNS3_DEVARG_RX_FUNC_HINT "=vec|sve|simple|common "
                HNS3_DEVARG_TX_FUNC_HINT "=vec|sve|simple|common "
                HNS3_DEVARG_DEV_CAPS_MASK "=<1-65535> "
                HNS3_DEVARG_MBX_TIME_LIMIT_MS "=<uint16_t> ");