mlx5/windows/mlx5_os.c

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright 2020 Mellanox Technologies, Ltd
 */

#include <errno.h>
#include <stdalign.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>

#include <rte_windows.h>
#include <ethdev_pci.h>

#include <mlx5_glue.h>
#include <mlx5_devx_cmds.h>
#include <mlx5_common.h>
#include <mlx5_common_mp.h>
#include <mlx5_common_mr.h>
#include <mlx5_malloc.h>

#include "mlx5_defs.h"
#include "mlx5.h"
#include "mlx5_common_os.h"
#include "mlx5_utils.h"
#include "mlx5_rxtx.h"
#include "mlx5_rx.h"
#include "mlx5_tx.h"
#include "mlx5_autoconf.h"
#include "mlx5_flow.h"
#include "mlx5_devx.h"

static const char *MZ_MLX5_PMD_SHARED_DATA = "mlx5_pmd_shared_data";

/* Spinlock for mlx5_shared_data allocation. */
static rte_spinlock_t mlx5_shared_data_lock = RTE_SPINLOCK_INITIALIZER;

/* rte flow indexed pool configuration. */
static struct mlx5_indexed_pool_config icfg[] = {
	{
		.size = sizeof(struct rte_flow),
		.trunk_size = 64,
		.need_lock = 1,
		.release_mem_en = 0,
		.malloc = mlx5_malloc,
		.free = mlx5_free,
		.per_core_cache = 0,
		.type = "ctl_flow_ipool",
	},
	{
		.size = sizeof(struct rte_flow),
		.trunk_size = 64,
		.grow_trunk = 3,
		.grow_shift = 2,
		.need_lock = 1,
		.release_mem_en = 0,
		.malloc = mlx5_malloc,
		.free = mlx5_free,
		.per_core_cache = 1 << 14,
		.type = "rte_flow_ipool",
	},
	{
		.size = sizeof(struct rte_flow),
		.trunk_size = 64,
		.grow_trunk = 3,
		.grow_shift = 2,
		.need_lock = 1,
		.release_mem_en = 0,
		.malloc = mlx5_malloc,
		.free = mlx5_free,
		.per_core_cache = 0,
		.type = "mcp_flow_ipool",
	},
};

static void
mlx5_queue_counter_id_prepare(struct rte_eth_dev *dev)
{
	struct mlx5_priv *priv = dev->data->dev_private;
	void *ctx = priv->sh->cdev->ctx;

	priv->q_counters = mlx5_devx_cmd_queue_counter_alloc(ctx);
	if (!priv->q_counters) {
		DRV_LOG(ERR, "Port %d queue counter object cannot be created "
			"by DevX - imissed counter will be unavailable",
			dev->data->port_id);
		return;
	}
	priv->counter_set_id = priv->q_counters->id;
}

/**
 * Initialize shared data between primary and secondary process.
 *
 * A memzone is reserved by primary process and secondary processes attach to
 * the memzone.
 *
 * @return
 *   0 on success, a negative errno value otherwise and rte_errno is set.
 */
static int
mlx5_init_shared_data(void)
{
	const struct rte_memzone *mz;
	int ret = 0;

	rte_spinlock_lock(&mlx5_shared_data_lock);
	if (mlx5_shared_data == NULL) {
		/* Allocate shared memory. */
		mz = rte_memzone_reserve(MZ_MLX5_PMD_SHARED_DATA,
					 sizeof(*mlx5_shared_data),
					 SOCKET_ID_ANY, 0);
		if (mz == NULL) {
			DRV_LOG(ERR,
				"Cannot allocate mlx5 shared data");
			ret = -rte_errno;
			goto error;
		}
		mlx5_shared_data = mz->addr;
		memset(mlx5_shared_data, 0, sizeof(*mlx5_shared_data));
		rte_spinlock_init(&mlx5_shared_data->lock);
	}
error:
	rte_spinlock_unlock(&mlx5_shared_data_lock);
	return ret;
}

/**
 * PMD global initialization.
 *
 * Independent from individual device, this function initializes global
 * per-PMD data structures distinguishing primary and secondary processes.
 * Hence, each initialization is called once per a process.
 *
 * @return
 *   0 on success, a negative errno value otherwise and rte_errno is set.
 */
static int
mlx5_init_once(void)
{
	if (mlx5_init_shared_data())
		return -rte_errno;
	return 0;
}

/**
 * Get mlx5 device capabilities.
 *
 * @param sh
 *   Pointer to shared device context.
 *
 * @return
 *   0 on success, a negative errno value otherwise and rte_errno is set.
 */
int
mlx5_os_capabilities_prepare(struct mlx5_dev_ctx_shared *sh)
{
	struct mlx5_hca_attr *hca_attr = &sh->cdev->config.hca_attr;
	struct mlx5_context *mlx5_ctx = sh->cdev->ctx;
	void *pv_iseg = NULL;
	u32 cb_iseg = 0;

	MLX5_ASSERT(sh->cdev->config.devx);
	MLX5_ASSERT(mlx5_dev_is_pci(sh->cdev->dev));
	pv_iseg = mlx5_glue->query_hca_iseg(mlx5_ctx, &cb_iseg);
	if (pv_iseg == NULL) {
		DRV_LOG(ERR, "Failed to get device hca_iseg.");
		rte_errno = errno;
		return -rte_errno;
	}
	memset(&sh->dev_cap, 0, sizeof(struct mlx5_dev_cap));
	sh->dev_cap.vf = mlx5_dev_is_vf_pci(RTE_DEV_TO_PCI(sh->cdev->dev));
	sh->dev_cap.max_cq = 1 << hca_attr->log_max_cq;
	sh->dev_cap.max_qp = 1 << hca_attr->log_max_qp;
	sh->dev_cap.max_qp_wr = 1 << hca_attr->log_max_qp_sz;
	sh->dev_cap.dv_flow_en = 1;
	DRV_LOG(DEBUG, "MPW isn't supported.");
	DRV_LOG(DEBUG, "MPLS over GRE/UDP tunnel offloading is no supported.");
	sh->dev_cap.hw_csum = hca_attr->csum_cap;
	DRV_LOG(DEBUG, "Checksum offloading is %ssupported.",
		(sh->dev_cap.hw_csum ? "" : "not "));
	sh->dev_cap.hw_vlan_strip = hca_attr->vlan_cap;
	DRV_LOG(DEBUG, "VLAN stripping is %ssupported.",
		(sh->dev_cap.hw_vlan_strip ? "" : "not "));
	sh->dev_cap.hw_fcs_strip = hca_attr->scatter_fcs;
	sh->dev_cap.tso = ((1 << hca_attr->max_lso_cap) > 0);
	if (sh->dev_cap.tso)
		sh->dev_cap.tso_max_payload_sz = 1 << hca_attr->max_lso_cap;
	DRV_LOG(DEBUG, "Counters are not supported.");
	if (hca_attr->striding_rq) {
		sh->dev_cap.mprq.enabled = 1;
		sh->dev_cap.mprq.log_min_stride_size =
			MLX5_MIN_SINGLE_STRIDE_LOG_NUM_BYTES;
		sh->dev_cap.mprq.log_max_stride_size =
			MLX5_MAX_SINGLE_STRIDE_LOG_NUM_BYTES;
		if (hca_attr->ext_stride_num_range)
			sh->dev_cap.mprq.log_min_stride_num =
				MLX5_EXT_MIN_SINGLE_WQE_LOG_NUM_STRIDES;
		else
			sh->dev_cap.mprq.log_min_stride_num =
				MLX5_MIN_SINGLE_WQE_LOG_NUM_STRIDES;
		sh->dev_cap.mprq.log_max_stride_num =
			MLX5_MAX_SINGLE_WQE_LOG_NUM_STRIDES;
		DRV_LOG(DEBUG, "\tmin_single_stride_log_num_of_bytes: %u",
			sh->dev_cap.mprq.log_min_stride_size);
		DRV_LOG(DEBUG, "\tmax_single_stride_log_num_of_bytes: %u",
			sh->dev_cap.mprq.log_max_stride_size);
		DRV_LOG(DEBUG, "\tmin_single_wqe_log_num_of_strides: %u",
			sh->dev_cap.mprq.log_min_stride_num);
		DRV_LOG(DEBUG, "\tmax_single_wqe_log_num_of_strides: %u",
			sh->dev_cap.mprq.log_max_stride_num);
		DRV_LOG(DEBUG, "\tmin_stride_wqe_log_size: %u",
			sh->dev_cap.mprq.log_min_stride_wqe_size);
		DRV_LOG(DEBUG, "Device supports Multi-Packet RQ.");
	}
	if (hca_attr->rss_ind_tbl_cap) {
		/*
		 * DPDK doesn't support larger/variable indirection tables.
		 * Once DPDK supports it, take max size from device attr.
		 */
		sh->dev_cap.ind_table_max_size =
			RTE_MIN((uint32_t)1 << hca_attr->rss_ind_tbl_cap,
				(uint32_t)RTE_ETH_RSS_RETA_SIZE_512);
		DRV_LOG(DEBUG, "Maximum Rx indirection table size is %u",
			sh->dev_cap.ind_table_max_size);
	}
	if (hca_attr->enhanced_multi_pkt_send_wqe)
		sh->dev_cap.mps = MLX5_MPW_ENHANCED;
	else if (hca_attr->multi_pkt_send_wqe &&
		 sh->dev_cap.mps != MLX5_ARG_UNSET)
		sh->dev_cap.mps = MLX5_MPW;
	else
		sh->dev_cap.mps = MLX5_MPW_DISABLED;
	sh->dev_cap.swp = mlx5_get_supported_sw_parsing_offloads(hca_attr);
	sh->dev_cap.tunnel_en = mlx5_get_supported_tunneling_offloads(hca_attr);
	if (sh->dev_cap.tunnel_en) {
		DRV_LOG(DEBUG, "Tunnel offloading is supported for %s%s%s",
			sh->dev_cap.tunnel_en &
			MLX5_TUNNELED_OFFLOADS_VXLAN_CAP ? "[VXLAN]" : "",
			sh->dev_cap.tunnel_en &
			MLX5_TUNNELED_OFFLOADS_GRE_CAP ? "[GRE]" : "",
			sh->dev_cap.tunnel_en &
			MLX5_TUNNELED_OFFLOADS_GENEVE_CAP ? "[GENEVE]" : "");
	} else {
		DRV_LOG(DEBUG, "Tunnel offloading is not supported.");
	}
	sh->dev_cap.cqe_comp = 0;
#if (RTE_CACHE_LINE_SIZE == 128)
	if (hca_attr->cqe_compression_128)
		sh->dev_cap.cqe_comp = 1;
	DRV_LOG(DEBUG, "Rx CQE 128B compression is %ssupported.",
		sh->dev_cap.cqe_comp ? "" : "not ");
#else
	if (hca_attr->cqe_compression)
		sh->dev_cap.cqe_comp = 1;
	DRV_LOG(DEBUG, "Rx CQE compression is %ssupported.",
		sh->dev_cap.cqe_comp ? "" : "not ");
#endif
	snprintf(sh->dev_cap.fw_ver, 64, "%x.%x.%04x",
		 MLX5_GET(initial_seg, pv_iseg, fw_rev_major),
		 MLX5_GET(initial_seg, pv_iseg, fw_rev_minor),
		 MLX5_GET(initial_seg, pv_iseg, fw_rev_subminor));
	DRV_LOG(DEBUG, "Packet pacing is not supported.");
	mlx5_rt_timestamp_config(sh, hca_attr);
	return 0;
}

/**
 * Initialize DR related data within private structure.
 * Routine checks the reference counter and does actual
 * resources creation/initialization only if counter is zero.
 *
 * @param[in] priv
 *   Pointer to the private device data structure.
 *
 * @return
 *   Zero on success, positive error code otherwise.
 */
static int
mlx5_alloc_shared_dr(struct mlx5_priv *priv)
{
	struct mlx5_dev_ctx_shared *sh = priv->sh;
	int err = 0;

	if (!sh->flow_tbls)
		err = mlx5_alloc_table_hash_list(priv);
	else
		DRV_LOG(DEBUG, "sh->flow_tbls[%p] already created, reuse",
			(void *)sh->flow_tbls);
	return err;
}
/**
 * Destroy DR related data within private structure.
 *
 * @param[in] priv
 *   Pointer to the private device data structure.
 */
void
mlx5_os_free_shared_dr(struct mlx5_priv *priv)
{
	mlx5_free_table_hash_list(priv);
}

/**
 * Set the completion channel file descriptor interrupt as non-blocking.
 * Currently it has no support under Windows.
 *
 * @param[in] rxq_obj
 *   Pointer to RQ channel object, which includes the channel fd
 *
 * @param[out] fd
 *   The file descriptor (representing the interrupt) used in this channel.
 *
 * @return
 *   0 on successfully setting the fd to non-blocking, non-zero otherwise.
 */
int
mlx5_os_set_nonblock_channel_fd(int fd)
{
	(void)fd;
	DRV_LOG(WARNING, "%s: is not supported", __func__);
	return -ENOTSUP;
}

/**
 * Spawn an Ethernet device from DevX information.
 *
 * @param dpdk_dev
 *   Backing DPDK device.
 * @param spawn
 *   Verbs device parameters (name, port, switch_info) to spawn.
 * @param mkvlist
 *   Pointer to mlx5 kvargs control, can be NULL if there is no devargs.
 *
 * @return
 *   A valid Ethernet device object on success, NULL otherwise and rte_errno
 *   is set. The following errors are defined:
 *
 *   EEXIST: device is already spawned
 */
static struct rte_eth_dev *
mlx5_dev_spawn(struct rte_device *dpdk_dev,
	       struct mlx5_dev_spawn_data *spawn,
	       struct mlx5_kvargs_ctrl *mkvlist)
{
	const struct mlx5_switch_info *switch_info = &spawn->info;
	struct mlx5_dev_ctx_shared *sh = NULL;
	struct rte_eth_dev *eth_dev = NULL;
	struct mlx5_priv *priv = NULL;
	int err = 0;
	struct rte_ether_addr mac;
	char name[RTE_ETH_NAME_MAX_LEN];
	int own_domain_id = 0;
	uint16_t port_id;
	int i;

	/* Build device name. */
	strlcpy(name, dpdk_dev->name, sizeof(name));
	/* check if the device is already spawned */
	if (rte_eth_dev_get_port_by_name(name, &port_id) == 0) {
		rte_errno = EEXIST;
		return NULL;
	}
	DRV_LOG(DEBUG, "naming Ethernet device \"%s\"", name);
	sh = mlx5_alloc_shared_dev_ctx(spawn, mkvlist);
	if (!sh)
		return NULL;
	if (!sh->config.dv_flow_en) {
		DRV_LOG(ERR, "Windows flow mode must be DV flow enable.");
		err = ENOTSUP;
		goto error;
	}
	if (sh->config.vf_nl_en) {
		DRV_LOG(DEBUG, "VF netlink isn't supported.");
		sh->config.vf_nl_en = 0;
	}
	/* Initialize the shutdown event in mlx5_dev_spawn to
	 * support mlx5_is_removed for Windows.
	 */
	err = mlx5_glue->devx_init_showdown_event(sh->cdev->ctx);
	if (err) {
		DRV_LOG(ERR, "failed to init showdown event: %s",
			strerror(errno));
		goto error;
	}
	/* Allocate private eth device data. */
	priv = mlx5_malloc(MLX5_MEM_ZERO | MLX5_MEM_RTE,
			   sizeof(*priv),
			   RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY);
	if (priv == NULL) {
		DRV_LOG(ERR, "priv allocation failure");
		err = ENOMEM;
		goto error;
	}
	priv->sh = sh;
	priv->dev_port = spawn->phys_port;
	priv->pci_dev = spawn->pci_dev;
	priv->mtu = RTE_ETHER_MTU;
	priv->mp_id.port_id = port_id;
	strlcpy(priv->mp_id.name, MLX5_MP_NAME, RTE_MP_MAX_NAME_LEN);
	priv->representor = !!switch_info->representor;
	priv->master = !!switch_info->master;
	priv->domain_id = RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID;
	priv->vport_meta_tag = 0;
	priv->vport_meta_mask = 0;
	priv->pf_bond = spawn->pf_bond;
	priv->vport_id = -1;
	/* representor_id field keeps the unmodified VF index. */
	priv->representor_id = -1;
	/*
	 * Look for sibling devices in order to reuse their switch domain
	 * if any, otherwise allocate one.
	 */
	MLX5_ETH_FOREACH_DEV(port_id, dpdk_dev) {
		const struct mlx5_priv *opriv =
			rte_eth_devices[port_id].data->dev_private;

		if (!opriv ||
		    opriv->sh != priv->sh ||
			opriv->domain_id ==
			RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID)
			continue;
		priv->domain_id = opriv->domain_id;
		break;
	}
	if (priv->domain_id == RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID) {
		err = rte_eth_switch_domain_alloc(&priv->domain_id);
		if (err) {
			err = rte_errno;
			DRV_LOG(ERR, "unable to allocate switch domain: %s",
				strerror(rte_errno));
			goto error;
		}
		own_domain_id = 1;
	}
	/* Process parameters and store port configuration on priv structure. */
	err = mlx5_port_args_config(priv, mkvlist, &priv->config);
	if (err) {
		err = rte_errno;
		DRV_LOG(ERR, "Failed to process port configure: %s",
			strerror(rte_errno));
		goto error;
	}
	eth_dev = rte_eth_dev_allocate(name);
	if (eth_dev == NULL) {
		DRV_LOG(ERR, "can not allocate rte ethdev");
		err = ENOMEM;
		goto error;
	}
	if (priv->representor) {
		eth_dev->data->dev_flags |= RTE_ETH_DEV_REPRESENTOR;
		eth_dev->data->representor_id = priv->representor_id;
		MLX5_ETH_FOREACH_DEV(port_id, dpdk_dev) {
			struct mlx5_priv *opriv =
				rte_eth_devices[port_id].data->dev_private;
			if (opriv &&
			    opriv->master &&
			    opriv->domain_id == priv->domain_id &&
			    opriv->sh == priv->sh) {
				eth_dev->data->backer_port_id = port_id;
				break;
			}
		}
		if (port_id >= RTE_MAX_ETHPORTS)
			eth_dev->data->backer_port_id = eth_dev->data->port_id;
	}
	/*
	 * Store associated network device interface index. This index
	 * is permanent throughout the lifetime of device. So, we may store
	 * the ifindex here and use the cached value further.
	 */
	MLX5_ASSERT(spawn->ifindex);
	priv->if_index = spawn->ifindex;
	eth_dev->data->dev_private = priv;
	priv->dev_data = eth_dev->data;
	eth_dev->data->mac_addrs = priv->mac;
	eth_dev->device = dpdk_dev;
	eth_dev->data->dev_flags |= RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
	/* Configure the first MAC address by default. */
	if (mlx5_get_mac(eth_dev, &mac.addr_bytes)) {
		DRV_LOG(ERR,
			"port %u cannot get MAC address, is mlx5_en"
			" loaded? (errno: %s).",
			eth_dev->data->port_id, strerror(rte_errno));
		err = ENODEV;
		goto error;
	}
	DRV_LOG(INFO,
		"port %u MAC address is " RTE_ETHER_ADDR_PRT_FMT,
		eth_dev->data->port_id, RTE_ETHER_ADDR_BYTES(&mac));
#ifdef RTE_LIBRTE_MLX5_DEBUG
	{
		char ifname[MLX5_NAMESIZE];

		if (mlx5_get_ifname(eth_dev, &ifname) == 0)
			DRV_LOG(DEBUG, "port %u ifname is \"%s\"",
				eth_dev->data->port_id, ifname);
		else
			DRV_LOG(DEBUG, "port %u ifname is unknown.",
				eth_dev->data->port_id);
	}
#endif
	/* Get actual MTU if possible. */
	err = mlx5_get_mtu(eth_dev, &priv->mtu);
	if (err) {
		err = rte_errno;
		goto error;
	}
	DRV_LOG(DEBUG, "port %u MTU is %u.", eth_dev->data->port_id,
		priv->mtu);
	/* Initialize burst functions to prevent crashes before link-up. */
	eth_dev->rx_pkt_burst = rte_eth_pkt_burst_dummy;
	eth_dev->tx_pkt_burst = rte_eth_pkt_burst_dummy;
	eth_dev->dev_ops = &mlx5_dev_ops;
	eth_dev->rx_descriptor_status = mlx5_rx_descriptor_status;
	eth_dev->tx_descriptor_status = mlx5_tx_descriptor_status;
	eth_dev->rx_queue_count = mlx5_rx_queue_count;
	/* Register MAC address. */
	claim_zero(mlx5_mac_addr_add(eth_dev, &mac, 0, 0));
	priv->ctrl_flows = 0;
	TAILQ_INIT(&priv->flow_meters);
	priv->mtr_profile_tbl = mlx5_l3t_create(MLX5_L3T_TYPE_PTR);
	if (!priv->mtr_profile_tbl)
		goto error;
	/* Bring Ethernet device up. */
	DRV_LOG(DEBUG, "port %u forcing Ethernet interface up.",
		eth_dev->data->port_id);
	/* nl calls are unsupported - set to -1 not to fail on release */
	priv->nl_socket_rdma = -1;
	priv->nl_socket_route = -1;
	mlx5_set_link_up(eth_dev);
	/*
	 * Even though the interrupt handler is not installed yet,
	 * interrupts will still trigger on the async_fd from
	 * Verbs context returned by ibv_open_device().
	 */
	mlx5_link_update(eth_dev, 0);
	for (i = 0; i < MLX5_FLOW_TYPE_MAXI; i++) {
		icfg[i].release_mem_en = !!sh->config.reclaim_mode;
		if (sh->config.reclaim_mode)
			icfg[i].per_core_cache = 0;
		priv->flows[i] = mlx5_ipool_create(&icfg[i]);
		if (!priv->flows[i])
			goto error;
	}
	/* Create context for virtual machine VLAN workaround. */
	priv->vmwa_context = NULL;
	if (sh->config.dv_flow_en) {
		err = mlx5_alloc_shared_dr(priv);
		if (err)
			goto error;
	}
	/* No supported flow priority number detection. */
	priv->sh->flow_max_priority = -1;
	mlx5_set_metadata_mask(eth_dev);
	if (sh->config.dv_xmeta_en != MLX5_XMETA_MODE_LEGACY &&
	    !priv->sh->dv_regc0_mask) {
		DRV_LOG(ERR, "metadata mode %u is not supported "
			     "(no metadata reg_c[0] is available).",
			     sh->config.dv_xmeta_en);
			err = ENOTSUP;
			goto error;
	}
	priv->hrxqs = mlx5_list_create("hrxq", eth_dev, true,
		mlx5_hrxq_create_cb, mlx5_hrxq_match_cb,
		mlx5_hrxq_remove_cb, mlx5_hrxq_clone_cb,
		mlx5_hrxq_clone_free_cb);
	/* Query availability of metadata reg_c's. */
	if (!priv->sh->metadata_regc_check_flag) {
		err = mlx5_flow_discover_mreg_c(eth_dev);
		if (err < 0) {
			err = -err;
			goto error;
		}
	}
	if (!mlx5_flow_ext_mreg_supported(eth_dev)) {
		DRV_LOG(DEBUG,
			"port %u extensive metadata register is not supported.",
			eth_dev->data->port_id);
		if (sh->config.dv_xmeta_en != MLX5_XMETA_MODE_LEGACY) {
			DRV_LOG(ERR, "metadata mode %u is not supported "
				     "(no metadata registers available).",
				     sh->config.dv_xmeta_en);
			err = ENOTSUP;
			goto error;
		}
	}
	if (sh->cdev->config.devx) {
		priv->obj_ops = devx_obj_ops;
	} else {
		DRV_LOG(ERR, "Windows flow must be DevX.");
		err = ENOTSUP;
		goto error;
	}
	mlx5_flow_counter_mode_config(eth_dev);
	mlx5_queue_counter_id_prepare(eth_dev);
	return eth_dev;
error:
	if (priv) {
		if (priv->mtr_profile_tbl)
			mlx5_l3t_destroy(priv->mtr_profile_tbl);
		if (own_domain_id)
			claim_zero(rte_eth_switch_domain_free(priv->domain_id));
		mlx5_free(priv);
		if (eth_dev != NULL)
			eth_dev->data->dev_private = NULL;
	}
	if (eth_dev != NULL) {
		/* mac_addrs must not be freed alone because part of
		 * dev_private
		 **/
		eth_dev->data->mac_addrs = NULL;
		rte_eth_dev_release_port(eth_dev);
	}
	if (sh)
		mlx5_free_shared_dev_ctx(sh);
	MLX5_ASSERT(err > 0);
	rte_errno = err;
	return NULL;
}

/**
 * This function should share events between multiple ports of single IB
 * device.  Currently it has no support under Windows.
 *
 * @param sh
 *   Pointer to mlx5_dev_ctx_shared object.
 */
void
mlx5_os_dev_shared_handler_install(struct mlx5_dev_ctx_shared *sh)
{
	(void)sh;
	DRV_LOG(WARNING, "%s: is not supported", __func__);
}

/**
 * This function should share events between multiple ports of single IB
 * device.  Currently it has no support under Windows.
 *
 * @param dev
 *   Pointer to mlx5_dev_ctx_shared object.
 */
void
mlx5_os_dev_shared_handler_uninstall(struct mlx5_dev_ctx_shared *sh)
{
	(void)sh;
	DRV_LOG(WARNING, "%s: is not supported", __func__);
}

/**
 * Read statistics by a named counter.
 *
 * @param[in] priv
 *   Pointer to the private device data structure.
 * @param[in] ctr_name
 *   Pointer to the name of the statistic counter to read
 * @param[out] stat
 *   Pointer to read statistic value.
 * @return
 *   0 on success and stat is valid, non-zero if failed to read the value
 *   or counter is not supported.
 *   rte_errno is set.
 *
 */
int
mlx5_os_read_dev_stat(struct mlx5_priv *priv, const char *ctr_name,
		      uint64_t *stat)
{
	if (priv->q_counters != NULL && strcmp(ctr_name, "out_of_buffer") == 0)
		return mlx5_devx_cmd_queue_counter_query
				(priv->q_counters, 0, (uint32_t *)stat);
	DRV_LOG(WARNING, "%s: is not supported for the %s counter",
		__func__, ctr_name);
	return -ENOTSUP;
}

/**
 * Flush device MAC addresses
 * Currently it has no support under Windows.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 *
 */
void
mlx5_os_mac_addr_flush(struct rte_eth_dev *dev)
{
	(void)dev;
	DRV_LOG(WARNING, "%s: is not supported", __func__);
}

/**
 * Remove a MAC address from device
 * Currently it has no support under Windows.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param index
 *   MAC address index.
 */
void
mlx5_os_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
{
	(void)dev;
	(void)(index);
	DRV_LOG(WARNING, "%s: is not supported", __func__);
}

/**
 * Adds a MAC address to the device
 * Currently it has no support under Windows.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param mac_addr
 *   MAC address to register.
 * @param index
 *   MAC address index.
 *
 * @return
 *   0 on success, a negative errno value otherwise
 */
int
mlx5_os_mac_addr_add(struct rte_eth_dev *dev, struct rte_ether_addr *mac,
		     uint32_t index)
{
	(void)index;
	struct rte_ether_addr lmac;

	if (mlx5_get_mac(dev, &lmac.addr_bytes)) {
		DRV_LOG(ERR,
			"port %u cannot get MAC address, is mlx5_en"
			" loaded? (errno: %s)",
			dev->data->port_id, strerror(rte_errno));
		return rte_errno;
	}
	if (!rte_is_same_ether_addr(&lmac, mac)) {
		DRV_LOG(ERR,
			"adding new mac address to device is unsupported");
		return -ENOTSUP;
	}
	return 0;
}

/**
 * Modify a VF MAC address
 * Currently it has no support under Windows.
 *
 * @param priv
 *   Pointer to device private data.
 * @param mac_addr
 *   MAC address to modify into.
 * @param iface_idx
 *   Net device interface index
 * @param vf_index
 *   VF index
 *
 * @return
 *   0 on success, a negative errno value otherwise
 */
int
mlx5_os_vf_mac_addr_modify(struct mlx5_priv *priv,
			   unsigned int iface_idx,
			   struct rte_ether_addr *mac_addr,
			   int vf_index)
{
	(void)priv;
	(void)iface_idx;
	(void)mac_addr;
	(void)vf_index;
	DRV_LOG(WARNING, "%s: is not supported", __func__);
	return -ENOTSUP;
}

/**
 * Set device promiscuous mode
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param enable
 *   0 - promiscuous is disabled, otherwise - enabled
 *
 * @return
 *   0 on success, a negative error value otherwise
 */
int
mlx5_os_set_promisc(struct rte_eth_dev *dev, int enable)
{
	struct mlx5_priv *priv = dev->data->dev_private;

	return mlx5_glue->devx_set_promisc_vport(priv->sh->cdev->ctx, ALL_PROMISC, enable);
}

/**
 * Set device allmulti mode
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param enable
 *   0 - all multicase is disabled, otherwise - enabled
 *
 * @return
 *   0 on success, a negative error value otherwise
 */
int
mlx5_os_set_allmulti(struct rte_eth_dev *dev, int enable)
{
	struct mlx5_priv *priv = dev->data->dev_private;

	return mlx5_glue->devx_set_promisc_vport(priv->sh->cdev->ctx, MC_PROMISC, enable);
}

/**
 * DPDK callback to register a PCI device.
 *
 * This function spawns Ethernet devices out of a given device.
 *
 * @param[in] cdev
 *   Pointer to the common device.
 * @param[in, out] mkvlist
 *   Pointer to mlx5 kvargs control, can be NULL if there is no devargs.
 *
 * @return
 *   0 on success, a negative errno value otherwise and rte_errno is set.
 */
int
mlx5_os_net_probe(struct mlx5_common_device *cdev,
		  struct mlx5_kvargs_ctrl *mkvlist)
{
	struct rte_pci_device *pci_dev = RTE_DEV_TO_PCI(cdev->dev);
	struct mlx5_dev_spawn_data spawn = {
		.pf_bond = -1,
		.max_port = 1,
		.phys_port = 1,
		.phys_dev_name = mlx5_os_get_ctx_device_name(cdev->ctx),
		.pci_dev = pci_dev,
		.cdev = cdev,
		.ifindex = -1, /* Spawn will assign */
		.info = (struct mlx5_switch_info){
			.name_type = MLX5_PHYS_PORT_NAME_TYPE_UPLINK,
		},
	};
	int ret;
	uint32_t restore;

	if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
		DRV_LOG(ERR, "Secondary process is not supported on Windows.");
		return -ENOTSUP;
	}
	ret = mlx5_init_once();
	if (ret) {
		DRV_LOG(ERR, "unable to init PMD global data: %s",
			strerror(rte_errno));
		return -rte_errno;
	}
	spawn.eth_dev = mlx5_dev_spawn(cdev->dev, &spawn, mkvlist);
	if (!spawn.eth_dev)
		return -rte_errno;
	restore = spawn.eth_dev->data->dev_flags;
	rte_eth_copy_pci_info(spawn.eth_dev, pci_dev);
	/* Restore non-PCI flags cleared by the above call. */
	spawn.eth_dev->data->dev_flags |= restore;
	rte_eth_dev_probing_finish(spawn.eth_dev);
	return 0;
}

/**
 * Cleanup resources when the last device is closed.
 */
void
mlx5_os_net_cleanup(void)
{
}

const struct mlx5_flow_driver_ops mlx5_flow_verbs_drv_ops = {0};