1 files changed, 1103 insertions, 0 deletions

diff --git a/src/spdk/dpdk/drivers/net/sfc/sfc.c b/src/spdk/dpdk/drivers/net/sfc/sfc.c
new file mode 100644
index 00000000..6690053f
--- /dev/null
+++ b/src/spdk/dpdk/drivers/net/sfc/sfc.c
@@ -0,0 +1,1103 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 2016-2018 Solarflare Communications Inc.
+ * All rights reserved.
+ *
+ * This software was jointly developed between OKTET Labs (under contract
+ * for Solarflare) and Solarflare Communications, Inc.
+ */
+
+/* sysconf() */
+#include <unistd.h>
+
+#include <rte_errno.h>
+#include <rte_alarm.h>
+
+#include "efx.h"
+
+#include "sfc.h"
+#include "sfc_log.h"
+#include "sfc_ev.h"
+#include "sfc_rx.h"
+#include "sfc_tx.h"
+#include "sfc_kvargs.h"
+#include "sfc_tweak.h"
+
+
+int
+sfc_dma_alloc(const struct sfc_adapter *sa, const char *name, uint16_t id,
+	      size_t len, int socket_id, efsys_mem_t *esmp)
+{
+	const struct rte_memzone *mz;
+
+	sfc_log_init(sa, "name=%s id=%u len=%lu socket_id=%d",
+		     name, id, len, socket_id);
+
+	mz = rte_eth_dma_zone_reserve(sa->eth_dev, name, id, len,
+				      sysconf(_SC_PAGESIZE), socket_id);
+	if (mz == NULL) {
+		sfc_err(sa, "cannot reserve DMA zone for %s:%u %#x@%d: %s",
+			name, (unsigned int)id, (unsigned int)len, socket_id,
+			rte_strerror(rte_errno));
+		return ENOMEM;
+	}
+
+	esmp->esm_addr = mz->iova;
+	if (esmp->esm_addr == RTE_BAD_IOVA) {
+		(void)rte_memzone_free(mz);
+		return EFAULT;
+	}
+
+	esmp->esm_mz = mz;
+	esmp->esm_base = mz->addr;
+
+	return 0;
+}
+
+void
+sfc_dma_free(const struct sfc_adapter *sa, efsys_mem_t *esmp)
+{
+	int rc;
+
+	sfc_log_init(sa, "name=%s", esmp->esm_mz->name);
+
+	rc = rte_memzone_free(esmp->esm_mz);
+	if (rc != 0)
+		sfc_err(sa, "rte_memzone_free(() failed: %d", rc);
+
+	memset(esmp, 0, sizeof(*esmp));
+}
+
+static uint32_t
+sfc_phy_cap_from_link_speeds(uint32_t speeds)
+{
+	uint32_t phy_caps = 0;
+
+	if (~speeds & ETH_LINK_SPEED_FIXED) {
+		phy_caps |= (1 << EFX_PHY_CAP_AN);
+		/*
+		 * If no speeds are specified in the mask, any supported
+		 * may be negotiated
+		 */
+		if (speeds == ETH_LINK_SPEED_AUTONEG)
+			phy_caps |=
+				(1 << EFX_PHY_CAP_1000FDX) |
+				(1 << EFX_PHY_CAP_10000FDX) |
+				(1 << EFX_PHY_CAP_25000FDX) |
+				(1 << EFX_PHY_CAP_40000FDX) |
+				(1 << EFX_PHY_CAP_50000FDX) |
+				(1 << EFX_PHY_CAP_100000FDX);
+	}
+	if (speeds & ETH_LINK_SPEED_1G)
+		phy_caps |= (1 << EFX_PHY_CAP_1000FDX);
+	if (speeds & ETH_LINK_SPEED_10G)
+		phy_caps |= (1 << EFX_PHY_CAP_10000FDX);
+	if (speeds & ETH_LINK_SPEED_25G)
+		phy_caps |= (1 << EFX_PHY_CAP_25000FDX);
+	if (speeds & ETH_LINK_SPEED_40G)
+		phy_caps |= (1 << EFX_PHY_CAP_40000FDX);
+	if (speeds & ETH_LINK_SPEED_50G)
+		phy_caps |= (1 << EFX_PHY_CAP_50000FDX);
+	if (speeds & ETH_LINK_SPEED_100G)
+		phy_caps |= (1 << EFX_PHY_CAP_100000FDX);
+
+	return phy_caps;
+}
+
+/*
+ * Check requested device level configuration.
+ * Receive and transmit configuration is checked in corresponding
+ * modules.
+ */
+static int
+sfc_check_conf(struct sfc_adapter *sa)
+{
+	const struct rte_eth_conf *conf = &sa->eth_dev->data->dev_conf;
+	int rc = 0;
+
+	sa->port.phy_adv_cap =
+		sfc_phy_cap_from_link_speeds(conf->link_speeds) &
+		sa->port.phy_adv_cap_mask;
+	if ((sa->port.phy_adv_cap & ~(1 << EFX_PHY_CAP_AN)) == 0) {
+		sfc_err(sa, "No link speeds from mask %#x are supported",
+			conf->link_speeds);
+		rc = EINVAL;
+	}
+
+#if !EFSYS_OPT_LOOPBACK
+	if (conf->lpbk_mode != 0) {
+		sfc_err(sa, "Loopback not supported");
+		rc = EINVAL;
+	}
+#endif
+
+	if (conf->dcb_capability_en != 0) {
+		sfc_err(sa, "Priority-based flow control not supported");
+		rc = EINVAL;
+	}
+
+	if (conf->fdir_conf.mode != RTE_FDIR_MODE_NONE) {
+		sfc_err(sa, "Flow Director not supported");
+		rc = EINVAL;
+	}
+
+	if ((conf->intr_conf.lsc != 0) &&
+	    (sa->intr.type != EFX_INTR_LINE) &&
+	    (sa->intr.type != EFX_INTR_MESSAGE)) {
+		sfc_err(sa, "Link status change interrupt not supported");
+		rc = EINVAL;
+	}
+
+	if (conf->intr_conf.rxq != 0) {
+		sfc_err(sa, "Receive queue interrupt not supported");
+		rc = EINVAL;
+	}
+
+	return rc;
+}
+
+/*
+ * Find out maximum number of receive and transmit queues which could be
+ * advertised.
+ *
+ * NIC is kept initialized on success to allow other modules acquire
+ * defaults and capabilities.
+ */
+static int
+sfc_estimate_resource_limits(struct sfc_adapter *sa)
+{
+	const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
+	efx_drv_limits_t limits;
+	int rc;
+	uint32_t evq_allocated;
+	uint32_t rxq_allocated;
+	uint32_t txq_allocated;
+
+	memset(&limits, 0, sizeof(limits));
+
+	/* Request at least one Rx and Tx queue */
+	limits.edl_min_rxq_count = 1;
+	limits.edl_min_txq_count = 1;
+	/* Management event queue plus event queue for each Tx and Rx queue */
+	limits.edl_min_evq_count =
+		1 + limits.edl_min_rxq_count + limits.edl_min_txq_count;
+
+	/* Divide by number of functions to guarantee that all functions
+	 * will get promised resources
+	 */
+	/* FIXME Divide by number of functions (not 2) below */
+	limits.edl_max_evq_count = encp->enc_evq_limit / 2;
+	SFC_ASSERT(limits.edl_max_evq_count >= limits.edl_min_rxq_count);
+
+	/* Split equally between receive and transmit */
+	limits.edl_max_rxq_count =
+		MIN(encp->enc_rxq_limit, (limits.edl_max_evq_count - 1) / 2);
+	SFC_ASSERT(limits.edl_max_rxq_count >= limits.edl_min_rxq_count);
+
+	limits.edl_max_txq_count =
+		MIN(encp->enc_txq_limit,
+		    limits.edl_max_evq_count - 1 - limits.edl_max_rxq_count);
+
+	if (sa->tso)
+		limits.edl_max_txq_count =
+			MIN(limits.edl_max_txq_count,
+			    encp->enc_fw_assisted_tso_v2_n_contexts /
+			    encp->enc_hw_pf_count);
+
+	SFC_ASSERT(limits.edl_max_txq_count >= limits.edl_min_rxq_count);
+
+	/* Configure the minimum required resources needed for the
+	 * driver to operate, and the maximum desired resources that the
+	 * driver is capable of using.
+	 */
+	efx_nic_set_drv_limits(sa->nic, &limits);
+
+	sfc_log_init(sa, "init nic");
+	rc = efx_nic_init(sa->nic);
+	if (rc != 0)
+		goto fail_nic_init;
+
+	/* Find resource dimensions assigned by firmware to this function */
+	rc = efx_nic_get_vi_pool(sa->nic, &evq_allocated, &rxq_allocated,
+				 &txq_allocated);
+	if (rc != 0)
+		goto fail_get_vi_pool;
+
+	/* It still may allocate more than maximum, ensure limit */
+	evq_allocated = MIN(evq_allocated, limits.edl_max_evq_count);
+	rxq_allocated = MIN(rxq_allocated, limits.edl_max_rxq_count);
+	txq_allocated = MIN(txq_allocated, limits.edl_max_txq_count);
+
+	/* Subtract management EVQ not used for traffic */
+	SFC_ASSERT(evq_allocated > 0);
+	evq_allocated--;
+
+	/* Right now we use separate EVQ for Rx and Tx */
+	sa->rxq_max = MIN(rxq_allocated, evq_allocated / 2);
+	sa->txq_max = MIN(txq_allocated, evq_allocated - sa->rxq_max);
+
+	/* Keep NIC initialized */
+	return 0;
+
+fail_get_vi_pool:
+fail_nic_init:
+	efx_nic_fini(sa->nic);
+	return rc;
+}
+
+static int
+sfc_set_drv_limits(struct sfc_adapter *sa)
+{
+	const struct rte_eth_dev_data *data = sa->eth_dev->data;
+	efx_drv_limits_t lim;
+
+	memset(&lim, 0, sizeof(lim));
+
+	/* Limits are strict since take into account initial estimation */
+	lim.edl_min_evq_count = lim.edl_max_evq_count =
+		1 + data->nb_rx_queues + data->nb_tx_queues;
+	lim.edl_min_rxq_count = lim.edl_max_rxq_count = data->nb_rx_queues;
+	lim.edl_min_txq_count = lim.edl_max_txq_count = data->nb_tx_queues;
+
+	return efx_nic_set_drv_limits(sa->nic, &lim);
+}
+
+static int
+sfc_set_fw_subvariant(struct sfc_adapter *sa)
+{
+	const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
+	uint64_t tx_offloads = sa->eth_dev->data->dev_conf.txmode.offloads;
+	unsigned int txq_index;
+	efx_nic_fw_subvariant_t req_fw_subvariant;
+	efx_nic_fw_subvariant_t cur_fw_subvariant;
+	int rc;
+
+	if (!encp->enc_fw_subvariant_no_tx_csum_supported) {
+		sfc_info(sa, "no-Tx-checksum subvariant not supported");
+		return 0;
+	}
+
+	for (txq_index = 0; txq_index < sa->txq_count; ++txq_index) {
+		struct sfc_txq_info *txq_info = &sa->txq_info[txq_index];
+
+		if (txq_info->txq != NULL)
+			tx_offloads |= txq_info->txq->offloads;
+	}
+
+	if (tx_offloads & (DEV_TX_OFFLOAD_IPV4_CKSUM |
+			   DEV_TX_OFFLOAD_TCP_CKSUM |
+			   DEV_TX_OFFLOAD_UDP_CKSUM |
+			   DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM))
+		req_fw_subvariant = EFX_NIC_FW_SUBVARIANT_DEFAULT;
+	else
+		req_fw_subvariant = EFX_NIC_FW_SUBVARIANT_NO_TX_CSUM;
+
+	rc = efx_nic_get_fw_subvariant(sa->nic, &cur_fw_subvariant);
+	if (rc != 0) {
+		sfc_err(sa, "failed to get FW subvariant: %d", rc);
+		return rc;
+	}
+	sfc_info(sa, "FW subvariant is %u vs required %u",
+		 cur_fw_subvariant, req_fw_subvariant);
+
+	if (cur_fw_subvariant == req_fw_subvariant)
+		return 0;
+
+	rc = efx_nic_set_fw_subvariant(sa->nic, req_fw_subvariant);
+	if (rc != 0) {
+		sfc_err(sa, "failed to set FW subvariant %u: %d",
+			req_fw_subvariant, rc);
+		return rc;
+	}
+	sfc_info(sa, "FW subvariant set to %u", req_fw_subvariant);
+
+	return 0;
+}
+
+static int
+sfc_try_start(struct sfc_adapter *sa)
+{
+	const efx_nic_cfg_t *encp;
+	int rc;
+
+	sfc_log_init(sa, "entry");
+
+	SFC_ASSERT(sfc_adapter_is_locked(sa));
+	SFC_ASSERT(sa->state == SFC_ADAPTER_STARTING);
+
+	sfc_log_init(sa, "set FW subvariant");
+	rc = sfc_set_fw_subvariant(sa);
+	if (rc != 0)
+		goto fail_set_fw_subvariant;
+
+	sfc_log_init(sa, "set resource limits");
+	rc = sfc_set_drv_limits(sa);
+	if (rc != 0)
+		goto fail_set_drv_limits;
+
+	sfc_log_init(sa, "init nic");
+	rc = efx_nic_init(sa->nic);
+	if (rc != 0)
+		goto fail_nic_init;
+
+	encp = efx_nic_cfg_get(sa->nic);
+	if (encp->enc_tunnel_encapsulations_supported != 0) {
+		sfc_log_init(sa, "apply tunnel config");
+		rc = efx_tunnel_reconfigure(sa->nic);
+		if (rc != 0)
+			goto fail_tunnel_reconfigure;
+	}
+
+	rc = sfc_intr_start(sa);
+	if (rc != 0)
+		goto fail_intr_start;
+
+	rc = sfc_ev_start(sa);
+	if (rc != 0)
+		goto fail_ev_start;
+
+	rc = sfc_port_start(sa);
+	if (rc != 0)
+		goto fail_port_start;
+
+	rc = sfc_rx_start(sa);
+	if (rc != 0)
+		goto fail_rx_start;
+
+	rc = sfc_tx_start(sa);
+	if (rc != 0)
+		goto fail_tx_start;
+
+	rc = sfc_flow_start(sa);
+	if (rc != 0)
+		goto fail_flows_insert;
+
+	sfc_log_init(sa, "done");
+	return 0;
+
+fail_flows_insert:
+	sfc_tx_stop(sa);
+
+fail_tx_start:
+	sfc_rx_stop(sa);
+
+fail_rx_start:
+	sfc_port_stop(sa);
+
+fail_port_start:
+	sfc_ev_stop(sa);
+
+fail_ev_start:
+	sfc_intr_stop(sa);
+
+fail_intr_start:
+fail_tunnel_reconfigure:
+	efx_nic_fini(sa->nic);
+
+fail_nic_init:
+fail_set_drv_limits:
+fail_set_fw_subvariant:
+	sfc_log_init(sa, "failed %d", rc);
+	return rc;
+}
+
+int
+sfc_start(struct sfc_adapter *sa)
+{
+	unsigned int start_tries = 3;
+	int rc;
+
+	sfc_log_init(sa, "entry");
+
+	SFC_ASSERT(sfc_adapter_is_locked(sa));
+
+	switch (sa->state) {
+	case SFC_ADAPTER_CONFIGURED:
+		break;
+	case SFC_ADAPTER_STARTED:
+		sfc_notice(sa, "already started");
+		return 0;
+	default:
+		rc = EINVAL;
+		goto fail_bad_state;
+	}
+
+	sa->state = SFC_ADAPTER_STARTING;
+
+	do {
+		rc = sfc_try_start(sa);
+	} while ((--start_tries > 0) &&
+		 (rc == EIO || rc == EAGAIN || rc == ENOENT || rc == EINVAL));
+
+	if (rc != 0)
+		goto fail_try_start;
+
+	sa->state = SFC_ADAPTER_STARTED;
+	sfc_log_init(sa, "done");
+	return 0;
+
+fail_try_start:
+	sa->state = SFC_ADAPTER_CONFIGURED;
+fail_bad_state:
+	sfc_log_init(sa, "failed %d", rc);
+	return rc;
+}
+
+void
+sfc_stop(struct sfc_adapter *sa)
+{
+	sfc_log_init(sa, "entry");
+
+	SFC_ASSERT(sfc_adapter_is_locked(sa));
+
+	switch (sa->state) {
+	case SFC_ADAPTER_STARTED:
+		break;
+	case SFC_ADAPTER_CONFIGURED:
+		sfc_notice(sa, "already stopped");
+		return;
+	default:
+		sfc_err(sa, "stop in unexpected state %u", sa->state);
+		SFC_ASSERT(B_FALSE);
+		return;
+	}
+
+	sa->state = SFC_ADAPTER_STOPPING;
+
+	sfc_flow_stop(sa);
+	sfc_tx_stop(sa);
+	sfc_rx_stop(sa);
+	sfc_port_stop(sa);
+	sfc_ev_stop(sa);
+	sfc_intr_stop(sa);
+	efx_nic_fini(sa->nic);
+
+	sa->state = SFC_ADAPTER_CONFIGURED;
+	sfc_log_init(sa, "done");
+}
+
+static int
+sfc_restart(struct sfc_adapter *sa)
+{
+	int rc;
+
+	SFC_ASSERT(sfc_adapter_is_locked(sa));
+
+	if (sa->state != SFC_ADAPTER_STARTED)
+		return EINVAL;
+
+	sfc_stop(sa);
+
+	rc = sfc_start(sa);
+	if (rc != 0)
+		sfc_err(sa, "restart failed");
+
+	return rc;
+}
+
+static void
+sfc_restart_if_required(void *arg)
+{
+	struct sfc_adapter *sa = arg;
+
+	/* If restart is scheduled, clear the flag and do it */
+	if (rte_atomic32_cmpset((volatile uint32_t *)&sa->restart_required,
+				1, 0)) {
+		sfc_adapter_lock(sa);
+		if (sa->state == SFC_ADAPTER_STARTED)
+			(void)sfc_restart(sa);
+		sfc_adapter_unlock(sa);
+	}
+}
+
+void
+sfc_schedule_restart(struct sfc_adapter *sa)
+{
+	int rc;
+
+	/* Schedule restart alarm if it is not scheduled yet */
+	if (!rte_atomic32_test_and_set(&sa->restart_required))
+		return;
+
+	rc = rte_eal_alarm_set(1, sfc_restart_if_required, sa);
+	if (rc == -ENOTSUP)
+		sfc_warn(sa, "alarms are not supported, restart is pending");
+	else if (rc != 0)
+		sfc_err(sa, "cannot arm restart alarm (rc=%d)", rc);
+	else
+		sfc_notice(sa, "restart scheduled");
+}
+
+int
+sfc_configure(struct sfc_adapter *sa)
+{
+	int rc;
+
+	sfc_log_init(sa, "entry");
+
+	SFC_ASSERT(sfc_adapter_is_locked(sa));
+
+	SFC_ASSERT(sa->state == SFC_ADAPTER_INITIALIZED ||
+		   sa->state == SFC_ADAPTER_CONFIGURED);
+	sa->state = SFC_ADAPTER_CONFIGURING;
+
+	rc = sfc_check_conf(sa);
+	if (rc != 0)
+		goto fail_check_conf;
+
+	rc = sfc_intr_configure(sa);
+	if (rc != 0)
+		goto fail_intr_configure;
+
+	rc = sfc_port_configure(sa);
+	if (rc != 0)
+		goto fail_port_configure;
+
+	rc = sfc_rx_configure(sa);
+	if (rc != 0)
+		goto fail_rx_configure;
+
+	rc = sfc_tx_configure(sa);
+	if (rc != 0)
+		goto fail_tx_configure;
+
+	sa->state = SFC_ADAPTER_CONFIGURED;
+	sfc_log_init(sa, "done");
+	return 0;
+
+fail_tx_configure:
+	sfc_rx_close(sa);
+
+fail_rx_configure:
+	sfc_port_close(sa);
+
+fail_port_configure:
+	sfc_intr_close(sa);
+
+fail_intr_configure:
+fail_check_conf:
+	sa->state = SFC_ADAPTER_INITIALIZED;
+	sfc_log_init(sa, "failed %d", rc);
+	return rc;
+}
+
+void
+sfc_close(struct sfc_adapter *sa)
+{
+	sfc_log_init(sa, "entry");
+
+	SFC_ASSERT(sfc_adapter_is_locked(sa));
+
+	SFC_ASSERT(sa->state == SFC_ADAPTER_CONFIGURED);
+	sa->state = SFC_ADAPTER_CLOSING;
+
+	sfc_tx_close(sa);
+	sfc_rx_close(sa);
+	sfc_port_close(sa);
+	sfc_intr_close(sa);
+
+	sa->state = SFC_ADAPTER_INITIALIZED;
+	sfc_log_init(sa, "done");
+}
+
+static int
+sfc_mem_bar_init(struct sfc_adapter *sa, unsigned int membar)
+{
+	struct rte_eth_dev *eth_dev = sa->eth_dev;
+	struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
+	efsys_bar_t *ebp = &sa->mem_bar;
+	struct rte_mem_resource *res = &pci_dev->mem_resource[membar];
+
+	SFC_BAR_LOCK_INIT(ebp, eth_dev->data->name);
+	ebp->esb_rid = membar;
+	ebp->esb_dev = pci_dev;
+	ebp->esb_base = res->addr;
+	return 0;
+}
+
+static void
+sfc_mem_bar_fini(struct sfc_adapter *sa)
+{
+	efsys_bar_t *ebp = &sa->mem_bar;
+
+	SFC_BAR_LOCK_DESTROY(ebp);
+	memset(ebp, 0, sizeof(*ebp));
+}
+
+/*
+ * A fixed RSS key which has a property of being symmetric
+ * (symmetrical flows are distributed to the same CPU)
+ * and also known to give a uniform distribution
+ * (a good distribution of traffic between different CPUs)
+ */
+static const uint8_t default_rss_key[EFX_RSS_KEY_SIZE] = {
+	0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a,
+	0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a,
+	0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a,
+	0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a,
+	0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a,
+};
+
+static int
+sfc_rss_attach(struct sfc_adapter *sa)
+{
+	struct sfc_rss *rss = &sa->rss;
+	int rc;
+
+	rc = efx_intr_init(sa->nic, sa->intr.type, NULL);
+	if (rc != 0)
+		goto fail_intr_init;
+
+	rc = efx_ev_init(sa->nic);
+	if (rc != 0)
+		goto fail_ev_init;
+
+	rc = efx_rx_init(sa->nic);
+	if (rc != 0)
+		goto fail_rx_init;
+
+	rc = efx_rx_scale_default_support_get(sa->nic, &rss->context_type);
+	if (rc != 0)
+		goto fail_scale_support_get;
+
+	rc = efx_rx_hash_default_support_get(sa->nic, &rss->hash_support);
+	if (rc != 0)
+		goto fail_hash_support_get;
+
+	rc = sfc_rx_hash_init(sa);
+	if (rc != 0)
+		goto fail_rx_hash_init;
+
+	efx_rx_fini(sa->nic);
+	efx_ev_fini(sa->nic);
+	efx_intr_fini(sa->nic);
+
+	rte_memcpy(rss->key, default_rss_key, sizeof(rss->key));
+
+	return 0;
+
+fail_rx_hash_init:
+fail_hash_support_get:
+fail_scale_support_get:
+	efx_rx_fini(sa->nic);
+
+fail_rx_init:
+	efx_ev_fini(sa->nic);
+
+fail_ev_init:
+	efx_intr_fini(sa->nic);
+
+fail_intr_init:
+	return rc;
+}
+
+static void
+sfc_rss_detach(struct sfc_adapter *sa)
+{
+	sfc_rx_hash_fini(sa);
+}
+
+int
+sfc_attach(struct sfc_adapter *sa)
+{
+	const efx_nic_cfg_t *encp;
+	efx_nic_t *enp = sa->nic;
+	int rc;
+
+	sfc_log_init(sa, "entry");
+
+	SFC_ASSERT(sfc_adapter_is_locked(sa));
+
+	efx_mcdi_new_epoch(enp);
+
+	sfc_log_init(sa, "reset nic");
+	rc = efx_nic_reset(enp);
+	if (rc != 0)
+		goto fail_nic_reset;
+
+	/*
+	 * Probed NIC is sufficient for tunnel init.
+	 * Initialize tunnel support to be able to use libefx
+	 * efx_tunnel_config_udp_{add,remove}() in any state and
+	 * efx_tunnel_reconfigure() on start up.
+	 */
+	rc = efx_tunnel_init(enp);
+	if (rc != 0)
+		goto fail_tunnel_init;
+
+	encp = efx_nic_cfg_get(sa->nic);
+
+	if (sa->dp_tx->features & SFC_DP_TX_FEAT_TSO) {
+		sa->tso = encp->enc_fw_assisted_tso_v2_enabled;
+		if (!sa->tso)
+			sfc_warn(sa,
+				 "TSO support isn't available on this adapter");
+	}
+
+	sfc_log_init(sa, "estimate resource limits");
+	rc = sfc_estimate_resource_limits(sa);
+	if (rc != 0)
+		goto fail_estimate_rsrc_limits;
+
+	sa->txq_max_entries = encp->enc_txq_max_ndescs;
+	SFC_ASSERT(rte_is_power_of_2(sa->txq_max_entries));
+
+	rc = sfc_intr_attach(sa);
+	if (rc != 0)
+		goto fail_intr_attach;
+
+	rc = sfc_ev_attach(sa);
+	if (rc != 0)
+		goto fail_ev_attach;
+
+	rc = sfc_port_attach(sa);
+	if (rc != 0)
+		goto fail_port_attach;
+
+	rc = sfc_rss_attach(sa);
+	if (rc != 0)
+		goto fail_rss_attach;
+
+	rc = sfc_filter_attach(sa);
+	if (rc != 0)
+		goto fail_filter_attach;
+
+	sfc_log_init(sa, "fini nic");
+	efx_nic_fini(enp);
+
+	sfc_flow_init(sa);
+
+	sa->state = SFC_ADAPTER_INITIALIZED;
+
+	sfc_log_init(sa, "done");
+	return 0;
+
+fail_filter_attach:
+	sfc_rss_detach(sa);
+
+fail_rss_attach:
+	sfc_port_detach(sa);
+
+fail_port_attach:
+	sfc_ev_detach(sa);
+
+fail_ev_attach:
+	sfc_intr_detach(sa);
+
+fail_intr_attach:
+	efx_nic_fini(sa->nic);
+
+fail_estimate_rsrc_limits:
+fail_tunnel_init:
+	efx_tunnel_fini(sa->nic);
+
+fail_nic_reset:
+
+	sfc_log_init(sa, "failed %d", rc);
+	return rc;
+}
+
+void
+sfc_detach(struct sfc_adapter *sa)
+{
+	sfc_log_init(sa, "entry");
+
+	SFC_ASSERT(sfc_adapter_is_locked(sa));
+
+	sfc_flow_fini(sa);
+
+	sfc_filter_detach(sa);
+	sfc_rss_detach(sa);
+	sfc_port_detach(sa);
+	sfc_ev_detach(sa);
+	sfc_intr_detach(sa);
+	efx_tunnel_fini(sa->nic);
+
+	sa->state = SFC_ADAPTER_UNINITIALIZED;
+}
+
+static int
+sfc_kvarg_fv_variant_handler(__rte_unused const char *key,
+			     const char *value_str, void *opaque)
+{
+	uint32_t *value = opaque;
+
+	if (strcasecmp(value_str, SFC_KVARG_FW_VARIANT_DONT_CARE) == 0)
+		*value = EFX_FW_VARIANT_DONT_CARE;
+	else if (strcasecmp(value_str, SFC_KVARG_FW_VARIANT_FULL_FEATURED) == 0)
+		*value = EFX_FW_VARIANT_FULL_FEATURED;
+	else if (strcasecmp(value_str, SFC_KVARG_FW_VARIANT_LOW_LATENCY) == 0)
+		*value = EFX_FW_VARIANT_LOW_LATENCY;
+	else if (strcasecmp(value_str, SFC_KVARG_FW_VARIANT_PACKED_STREAM) == 0)
+		*value = EFX_FW_VARIANT_PACKED_STREAM;
+	else if (strcasecmp(value_str, SFC_KVARG_FW_VARIANT_DPDK) == 0)
+		*value = EFX_FW_VARIANT_DPDK;
+	else
+		return -EINVAL;
+
+	return 0;
+}
+
+static int
+sfc_get_fw_variant(struct sfc_adapter *sa, efx_fw_variant_t *efv)
+{
+	efx_nic_fw_info_t enfi;
+	int rc;
+
+	rc = efx_nic_get_fw_version(sa->nic, &enfi);
+	if (rc != 0)
+		return rc;
+	else if (!enfi.enfi_dpcpu_fw_ids_valid)
+		return ENOTSUP;
+
+	/*
+	 * Firmware variant can be uniquely identified by the RxDPCPU
+	 * firmware id
+	 */
+	switch (enfi.enfi_rx_dpcpu_fw_id) {
+	case EFX_RXDP_FULL_FEATURED_FW_ID:
+		*efv = EFX_FW_VARIANT_FULL_FEATURED;
+		break;
+
+	case EFX_RXDP_LOW_LATENCY_FW_ID:
+		*efv = EFX_FW_VARIANT_LOW_LATENCY;
+		break;
+
+	case EFX_RXDP_PACKED_STREAM_FW_ID:
+		*efv = EFX_FW_VARIANT_PACKED_STREAM;
+		break;
+
+	case EFX_RXDP_DPDK_FW_ID:
+		*efv = EFX_FW_VARIANT_DPDK;
+		break;
+
+	default:
+		/*
+		 * Other firmware variants are not considered, since they are
+		 * not supported in the device parameters
+		 */
+		*efv = EFX_FW_VARIANT_DONT_CARE;
+		break;
+	}
+
+	return 0;
+}
+
+static const char *
+sfc_fw_variant2str(efx_fw_variant_t efv)
+{
+	switch (efv) {
+	case EFX_RXDP_FULL_FEATURED_FW_ID:
+		return SFC_KVARG_FW_VARIANT_FULL_FEATURED;
+	case EFX_RXDP_LOW_LATENCY_FW_ID:
+		return SFC_KVARG_FW_VARIANT_LOW_LATENCY;
+	case EFX_RXDP_PACKED_STREAM_FW_ID:
+		return SFC_KVARG_FW_VARIANT_PACKED_STREAM;
+	case EFX_RXDP_DPDK_FW_ID:
+		return SFC_KVARG_FW_VARIANT_DPDK;
+	default:
+		return "unknown";
+	}
+}
+
+static int
+sfc_kvarg_rxd_wait_timeout_ns(struct sfc_adapter *sa)
+{
+	int rc;
+	long value;
+
+	value = SFC_RXD_WAIT_TIMEOUT_NS_DEF;
+
+	rc = sfc_kvargs_process(sa, SFC_KVARG_RXD_WAIT_TIMEOUT_NS,
+				sfc_kvarg_long_handler, &value);
+	if (rc != 0)
+		return rc;
+
+	if (value < 0 ||
+	    (unsigned long)value > EFX_RXQ_ES_SUPER_BUFFER_HOL_BLOCK_MAX) {
+		sfc_err(sa, "wrong '" SFC_KVARG_RXD_WAIT_TIMEOUT_NS "' "
+			    "was set (%ld);", value);
+		sfc_err(sa, "it must not be less than 0 or greater than %u",
+			    EFX_RXQ_ES_SUPER_BUFFER_HOL_BLOCK_MAX);
+		return EINVAL;
+	}
+
+	sa->rxd_wait_timeout_ns = value;
+	return 0;
+}
+
+static int
+sfc_nic_probe(struct sfc_adapter *sa)
+{
+	efx_nic_t *enp = sa->nic;
+	efx_fw_variant_t preferred_efv;
+	efx_fw_variant_t efv;
+	int rc;
+
+	preferred_efv = EFX_FW_VARIANT_DONT_CARE;
+	rc = sfc_kvargs_process(sa, SFC_KVARG_FW_VARIANT,
+				sfc_kvarg_fv_variant_handler,
+				&preferred_efv);
+	if (rc != 0) {
+		sfc_err(sa, "invalid %s parameter value", SFC_KVARG_FW_VARIANT);
+		return rc;
+	}
+
+	rc = sfc_kvarg_rxd_wait_timeout_ns(sa);
+	if (rc != 0)
+		return rc;
+
+	rc = efx_nic_probe(enp, preferred_efv);
+	if (rc == EACCES) {
+		/* Unprivileged functions cannot set FW variant */
+		rc = efx_nic_probe(enp, EFX_FW_VARIANT_DONT_CARE);
+	}
+	if (rc != 0)
+		return rc;
+
+	rc = sfc_get_fw_variant(sa, &efv);
+	if (rc == ENOTSUP) {
+		sfc_warn(sa, "FW variant can not be obtained");
+		return 0;
+	}
+	if (rc != 0)
+		return rc;
+
+	/* Check that firmware variant was changed to the requested one */
+	if (preferred_efv != EFX_FW_VARIANT_DONT_CARE && preferred_efv != efv) {
+		sfc_warn(sa, "FW variant has not changed to the requested %s",
+			 sfc_fw_variant2str(preferred_efv));
+	}
+
+	sfc_notice(sa, "running FW variant is %s", sfc_fw_variant2str(efv));
+
+	return 0;
+}
+
+int
+sfc_probe(struct sfc_adapter *sa)
+{
+	struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(sa->eth_dev);
+	unsigned int membar;
+	efx_nic_t *enp;
+	int rc;
+
+	sfc_log_init(sa, "entry");
+
+	SFC_ASSERT(sfc_adapter_is_locked(sa));
+
+	sa->socket_id = rte_socket_id();
+	rte_atomic32_init(&sa->restart_required);
+
+	sfc_log_init(sa, "get family");
+	rc = efx_family(pci_dev->id.vendor_id, pci_dev->id.device_id,
+			&sa->family, &membar);
+	if (rc != 0)
+		goto fail_family;
+	sfc_log_init(sa, "family is %u, membar is %u", sa->family, membar);
+
+	sfc_log_init(sa, "init mem bar");
+	rc = sfc_mem_bar_init(sa, membar);
+	if (rc != 0)
+		goto fail_mem_bar_init;
+
+	sfc_log_init(sa, "create nic");
+	rte_spinlock_init(&sa->nic_lock);
+	rc = efx_nic_create(sa->family, (efsys_identifier_t *)sa,
+			    &sa->mem_bar, &sa->nic_lock, &enp);
+	if (rc != 0)
+		goto fail_nic_create;
+	sa->nic = enp;
+
+	rc = sfc_mcdi_init(sa);
+	if (rc != 0)
+		goto fail_mcdi_init;
+
+	sfc_log_init(sa, "probe nic");
+	rc = sfc_nic_probe(sa);
+	if (rc != 0)
+		goto fail_nic_probe;
+
+	sfc_log_init(sa, "done");
+	return 0;
+
+fail_nic_probe:
+	sfc_mcdi_fini(sa);
+
+fail_mcdi_init:
+	sfc_log_init(sa, "destroy nic");
+	sa->nic = NULL;
+	efx_nic_destroy(enp);
+
+fail_nic_create:
+	sfc_mem_bar_fini(sa);
+
+fail_mem_bar_init:
+fail_family:
+	sfc_log_init(sa, "failed %d", rc);
+	return rc;
+}
+
+void
+sfc_unprobe(struct sfc_adapter *sa)
+{
+	efx_nic_t *enp = sa->nic;
+
+	sfc_log_init(sa, "entry");
+
+	SFC_ASSERT(sfc_adapter_is_locked(sa));
+
+	sfc_log_init(sa, "unprobe nic");
+	efx_nic_unprobe(enp);
+
+	sfc_mcdi_fini(sa);
+
+	/*
+	 * Make sure there is no pending alarm to restart since we are
+	 * going to free device private which is passed as the callback
+	 * opaque data. A new alarm cannot be scheduled since MCDI is
+	 * shut down.
+	 */
+	rte_eal_alarm_cancel(sfc_restart_if_required, sa);
+
+	sfc_log_init(sa, "destroy nic");
+	sa->nic = NULL;
+	efx_nic_destroy(enp);
+
+	sfc_mem_bar_fini(sa);
+
+	sfc_flow_fini(sa);
+	sa->state = SFC_ADAPTER_UNINITIALIZED;
+}
+
+uint32_t
+sfc_register_logtype(struct sfc_adapter *sa, const char *lt_prefix_str,
+		     uint32_t ll_default)
+{
+	size_t lt_prefix_str_size = strlen(lt_prefix_str);
+	size_t lt_str_size_max;
+	char *lt_str = NULL;
+	int ret;
+
+	if (SIZE_MAX - PCI_PRI_STR_SIZE - 1 > lt_prefix_str_size) {
+		++lt_prefix_str_size; /* Reserve space for prefix separator */
+		lt_str_size_max = lt_prefix_str_size + PCI_PRI_STR_SIZE + 1;
+	} else {
+		return RTE_LOGTYPE_PMD;
+	}
+
+	lt_str = rte_zmalloc("logtype_str", lt_str_size_max, 0);
+	if (lt_str == NULL)
+		return RTE_LOGTYPE_PMD;
+
+	strncpy(lt_str, lt_prefix_str, lt_prefix_str_size);
+	lt_str[lt_prefix_str_size - 1] = '.';
+	rte_pci_device_name(&sa->pci_addr, lt_str + lt_prefix_str_size,
+			    lt_str_size_max - lt_prefix_str_size);
+	lt_str[lt_str_size_max - 1] = '\0';
+
+	ret = rte_log_register_type_and_pick_level(lt_str, ll_default);
+	rte_free(lt_str);
+
+	return (ret < 0) ? RTE_LOGTYPE_PMD : ret;
+}