drivers/net/ethernet/intel/iavf/iavf_main.c

root/drivers/net/ethernet/intel/iavf/iavf_main.c
// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2013 - 2018 Intel Corporation. */

#include <linux/net/intel/libie/rx.h>
#include <net/netdev_lock.h>

#include "iavf.h"
#include "iavf_ptp.h"
#include "iavf_prototype.h"
/* All iavf tracepoints are defined by the include below, which must
 * be included exactly once across the whole kernel with
 * CREATE_TRACE_POINTS defined
 */
#define CREATE_TRACE_POINTS
#include "iavf_trace.h"

static int iavf_setup_all_tx_resources(struct iavf_adapter *adapter);
static int iavf_setup_all_rx_resources(struct iavf_adapter *adapter);
static int iavf_close(struct net_device *netdev);
static void iavf_init_get_resources(struct iavf_adapter *adapter);
static int iavf_check_reset_complete(struct iavf_hw *hw);

char iavf_driver_name[] = "iavf";
static const char iavf_driver_string[] =
        "Intel(R) Ethernet Adaptive Virtual Function Network Driver";

static const char iavf_copyright[] =
        "Copyright (c) 2013 - 2018 Intel Corporation.";

/* iavf_pci_tbl - PCI Device ID Table
 *
 * Wildcard entries (PCI_ANY_ID) should come last
 * Last entry must be all 0s
 *
 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
 *   Class, Class Mask, private data (not used) }
 */
static const struct pci_device_id iavf_pci_tbl[] = {
        {PCI_VDEVICE(INTEL, IAVF_DEV_ID_VF), 0},
        {PCI_VDEVICE(INTEL, IAVF_DEV_ID_VF_HV), 0},
        {PCI_VDEVICE(INTEL, IAVF_DEV_ID_X722_VF), 0},
        {PCI_VDEVICE(INTEL, IAVF_DEV_ID_ADAPTIVE_VF), 0},
        /* required last entry */
        {0, }
};

MODULE_DEVICE_TABLE(pci, iavf_pci_tbl);

MODULE_ALIAS("i40evf");
MODULE_DESCRIPTION("Intel(R) Ethernet Adaptive Virtual Function Network Driver");
MODULE_IMPORT_NS("LIBETH");
MODULE_IMPORT_NS("LIBIE");
MODULE_IMPORT_NS("LIBIE_ADMINQ");
MODULE_LICENSE("GPL v2");

static const struct net_device_ops iavf_netdev_ops;

int iavf_status_to_errno(enum iavf_status status)
{
        switch (status) {
        case IAVF_SUCCESS:
                return 0;
        case IAVF_ERR_PARAM:
        case IAVF_ERR_MAC_TYPE:
        case IAVF_ERR_INVALID_MAC_ADDR:
        case IAVF_ERR_INVALID_LINK_SETTINGS:
        case IAVF_ERR_INVALID_PD_ID:
        case IAVF_ERR_INVALID_QP_ID:
        case IAVF_ERR_INVALID_CQ_ID:
        case IAVF_ERR_INVALID_CEQ_ID:
        case IAVF_ERR_INVALID_AEQ_ID:
        case IAVF_ERR_INVALID_SIZE:
        case IAVF_ERR_INVALID_ARP_INDEX:
        case IAVF_ERR_INVALID_FPM_FUNC_ID:
        case IAVF_ERR_QP_INVALID_MSG_SIZE:
        case IAVF_ERR_INVALID_FRAG_COUNT:
        case IAVF_ERR_INVALID_ALIGNMENT:
        case IAVF_ERR_INVALID_PUSH_PAGE_INDEX:
        case IAVF_ERR_INVALID_IMM_DATA_SIZE:
        case IAVF_ERR_INVALID_VF_ID:
        case IAVF_ERR_INVALID_HMCFN_ID:
        case IAVF_ERR_INVALID_PBLE_INDEX:
        case IAVF_ERR_INVALID_SD_INDEX:
        case IAVF_ERR_INVALID_PAGE_DESC_INDEX:
        case IAVF_ERR_INVALID_SD_TYPE:
        case IAVF_ERR_INVALID_HMC_OBJ_INDEX:
        case IAVF_ERR_INVALID_HMC_OBJ_COUNT:
        case IAVF_ERR_INVALID_SRQ_ARM_LIMIT:
                return -EINVAL;
        case IAVF_ERR_NVM:
        case IAVF_ERR_NVM_CHECKSUM:
        case IAVF_ERR_PHY:
        case IAVF_ERR_CONFIG:
        case IAVF_ERR_UNKNOWN_PHY:
        case IAVF_ERR_LINK_SETUP:
        case IAVF_ERR_ADAPTER_STOPPED:
        case IAVF_ERR_PRIMARY_REQUESTS_PENDING:
        case IAVF_ERR_AUTONEG_NOT_COMPLETE:
        case IAVF_ERR_RESET_FAILED:
        case IAVF_ERR_BAD_PTR:
        case IAVF_ERR_SWFW_SYNC:
        case IAVF_ERR_QP_TOOMANY_WRS_POSTED:
        case IAVF_ERR_QUEUE_EMPTY:
        case IAVF_ERR_FLUSHED_QUEUE:
        case IAVF_ERR_OPCODE_MISMATCH:
        case IAVF_ERR_CQP_COMPL_ERROR:
        case IAVF_ERR_BACKING_PAGE_ERROR:
        case IAVF_ERR_NO_PBLCHUNKS_AVAILABLE:
        case IAVF_ERR_MEMCPY_FAILED:
        case IAVF_ERR_SRQ_ENABLED:
        case IAVF_ERR_ADMIN_QUEUE_ERROR:
        case IAVF_ERR_ADMIN_QUEUE_FULL:
        case IAVF_ERR_BAD_RDMA_CQE:
        case IAVF_ERR_NVM_BLANK_MODE:
        case IAVF_ERR_PE_DOORBELL_NOT_ENABLED:
        case IAVF_ERR_DIAG_TEST_FAILED:
        case IAVF_ERR_FIRMWARE_API_VERSION:
        case IAVF_ERR_ADMIN_QUEUE_CRITICAL_ERROR:
                return -EIO;
        case IAVF_ERR_DEVICE_NOT_SUPPORTED:
                return -ENODEV;
        case IAVF_ERR_NO_AVAILABLE_VSI:
        case IAVF_ERR_RING_FULL:
                return -ENOSPC;
        case IAVF_ERR_NO_MEMORY:
                return -ENOMEM;
        case IAVF_ERR_TIMEOUT:
        case IAVF_ERR_ADMIN_QUEUE_TIMEOUT:
                return -ETIMEDOUT;
        case IAVF_ERR_NOT_IMPLEMENTED:
        case IAVF_NOT_SUPPORTED:
                return -EOPNOTSUPP;
        case IAVF_ERR_ADMIN_QUEUE_NO_WORK:
                return -EALREADY;
        case IAVF_ERR_NOT_READY:
                return -EBUSY;
        case IAVF_ERR_BUF_TOO_SHORT:
                return -EMSGSIZE;
        }

        return -EIO;
}

int virtchnl_status_to_errno(enum virtchnl_status_code v_status)
{
        switch (v_status) {
        case VIRTCHNL_STATUS_SUCCESS:
                return 0;
        case VIRTCHNL_STATUS_ERR_PARAM:
        case VIRTCHNL_STATUS_ERR_INVALID_VF_ID:
                return -EINVAL;
        case VIRTCHNL_STATUS_ERR_NO_MEMORY:
                return -ENOMEM;
        case VIRTCHNL_STATUS_ERR_OPCODE_MISMATCH:
        case VIRTCHNL_STATUS_ERR_CQP_COMPL_ERROR:
        case VIRTCHNL_STATUS_ERR_ADMIN_QUEUE_ERROR:
                return -EIO;
        case VIRTCHNL_STATUS_ERR_NOT_SUPPORTED:
                return -EOPNOTSUPP;
        }

        return -EIO;
}

/**
 * iavf_pdev_to_adapter - go from pci_dev to adapter
 * @pdev: pci_dev pointer
 */
static struct iavf_adapter *iavf_pdev_to_adapter(struct pci_dev *pdev)
{
        return netdev_priv(pci_get_drvdata(pdev));
}

/**
 * iavf_is_reset_in_progress - Check if a reset is in progress
 * @adapter: board private structure
 */
static bool iavf_is_reset_in_progress(struct iavf_adapter *adapter)
{
        if (adapter->state == __IAVF_RESETTING ||
            adapter->flags & (IAVF_FLAG_RESET_PENDING |
                              IAVF_FLAG_RESET_NEEDED))
                return true;

        return false;
}

/**
 * iavf_allocate_dma_mem_d - OS specific memory alloc for shared code
 * @hw:   pointer to the HW structure
 * @mem:  ptr to mem struct to fill out
 * @size: size of memory requested
 * @alignment: what to align the allocation to
 **/
enum iavf_status iavf_allocate_dma_mem_d(struct iavf_hw *hw,
                                         struct iavf_dma_mem *mem,
                                         u64 size, u32 alignment)
{
        struct iavf_adapter *adapter = (struct iavf_adapter *)hw->back;

        if (!mem)
                return IAVF_ERR_PARAM;

        mem->size = ALIGN(size, alignment);
        mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
                                     (dma_addr_t *)&mem->pa, GFP_KERNEL);
        if (mem->va)
                return 0;
        else
                return IAVF_ERR_NO_MEMORY;
}

/**
 * iavf_free_dma_mem - wrapper for DMA memory freeing
 * @hw:   pointer to the HW structure
 * @mem:  ptr to mem struct to free
 **/
enum iavf_status iavf_free_dma_mem(struct iavf_hw *hw, struct iavf_dma_mem *mem)
{
        struct iavf_adapter *adapter = (struct iavf_adapter *)hw->back;

        if (!mem || !mem->va)
                return IAVF_ERR_PARAM;
        dma_free_coherent(&adapter->pdev->dev, mem->size,
                          mem->va, (dma_addr_t)mem->pa);
        return 0;
}

/**
 * iavf_allocate_virt_mem - virt memory alloc wrapper
 * @hw:   pointer to the HW structure
 * @mem:  ptr to mem struct to fill out
 * @size: size of memory requested
 **/
enum iavf_status iavf_allocate_virt_mem(struct iavf_hw *hw,
                                        struct iavf_virt_mem *mem, u32 size)
{
        if (!mem)
                return IAVF_ERR_PARAM;

        mem->size = size;
        mem->va = kzalloc(size, GFP_KERNEL);

        if (mem->va)
                return 0;
        else
                return IAVF_ERR_NO_MEMORY;
}

/**
 * iavf_free_virt_mem - virt memory free wrapper
 * @hw:   pointer to the HW structure
 * @mem:  ptr to mem struct to free
 **/
void iavf_free_virt_mem(struct iavf_hw *hw, struct iavf_virt_mem *mem)
{
        kfree(mem->va);
}

/**
 * iavf_schedule_reset - Set the flags and schedule a reset event
 * @adapter: board private structure
 * @flags: IAVF_FLAG_RESET_PENDING or IAVF_FLAG_RESET_NEEDED
 **/
void iavf_schedule_reset(struct iavf_adapter *adapter, u64 flags)
{
        if (!test_bit(__IAVF_IN_REMOVE_TASK, &adapter->crit_section) &&
            !(adapter->flags &
            (IAVF_FLAG_RESET_PENDING | IAVF_FLAG_RESET_NEEDED))) {
                adapter->flags |= flags;
                queue_work(adapter->wq, &adapter->reset_task);
        }
}

/**
 * iavf_schedule_aq_request - Set the flags and schedule aq request
 * @adapter: board private structure
 * @flags: requested aq flags
 **/
void iavf_schedule_aq_request(struct iavf_adapter *adapter, u64 flags)
{
        adapter->aq_required |= flags;
        mod_delayed_work(adapter->wq, &adapter->watchdog_task, 0);
}

/**
 * iavf_tx_timeout - Respond to a Tx Hang
 * @netdev: network interface device structure
 * @txqueue: queue number that is timing out
 **/
static void iavf_tx_timeout(struct net_device *netdev, unsigned int txqueue)
{
        struct iavf_adapter *adapter = netdev_priv(netdev);

        adapter->tx_timeout_count++;
        iavf_schedule_reset(adapter, IAVF_FLAG_RESET_NEEDED);
}

/**
 * iavf_misc_irq_disable - Mask off interrupt generation on the NIC
 * @adapter: board private structure
 **/
static void iavf_misc_irq_disable(struct iavf_adapter *adapter)
{
        struct iavf_hw *hw = &adapter->hw;

        if (!adapter->msix_entries)
                return;

        wr32(hw, IAVF_VFINT_DYN_CTL01, 0);

        iavf_flush(hw);

        synchronize_irq(adapter->msix_entries[0].vector);
}

/**
 * iavf_misc_irq_enable - Enable default interrupt generation settings
 * @adapter: board private structure
 **/
static void iavf_misc_irq_enable(struct iavf_adapter *adapter)
{
        struct iavf_hw *hw = &adapter->hw;

        wr32(hw, IAVF_VFINT_DYN_CTL01, IAVF_VFINT_DYN_CTL01_INTENA_MASK |
                                       IAVF_VFINT_DYN_CTL01_ITR_INDX_MASK);
        wr32(hw, IAVF_VFINT_ICR0_ENA1, IAVF_VFINT_ICR0_ENA1_ADMINQ_MASK);

        iavf_flush(hw);
}

/**
 * iavf_irq_disable - Mask off interrupt generation on the NIC
 * @adapter: board private structure
 **/
static void iavf_irq_disable(struct iavf_adapter *adapter)
{
        int i;
        struct iavf_hw *hw = &adapter->hw;

        if (!adapter->msix_entries)
                return;

        for (i = 1; i < adapter->num_msix_vectors; i++) {
                wr32(hw, IAVF_VFINT_DYN_CTLN1(i - 1), 0);
                synchronize_irq(adapter->msix_entries[i].vector);
        }
        iavf_flush(hw);
}

/**
 * iavf_irq_enable_queues - Enable interrupt for all queues
 * @adapter: board private structure
 **/
static void iavf_irq_enable_queues(struct iavf_adapter *adapter)
{
        struct iavf_hw *hw = &adapter->hw;
        int i;

        for (i = 1; i < adapter->num_msix_vectors; i++) {
                wr32(hw, IAVF_VFINT_DYN_CTLN1(i - 1),
                     IAVF_VFINT_DYN_CTLN1_INTENA_MASK |
                     IAVF_VFINT_DYN_CTLN1_ITR_INDX_MASK);
        }
}

/**
 * iavf_irq_enable - Enable default interrupt generation settings
 * @adapter: board private structure
 * @flush: boolean value whether to run rd32()
 **/
void iavf_irq_enable(struct iavf_adapter *adapter, bool flush)
{
        struct iavf_hw *hw = &adapter->hw;

        iavf_misc_irq_enable(adapter);
        iavf_irq_enable_queues(adapter);

        if (flush)
                iavf_flush(hw);
}

/**
 * iavf_msix_aq - Interrupt handler for vector 0
 * @irq: interrupt number
 * @data: pointer to netdev
 **/
static irqreturn_t iavf_msix_aq(int irq, void *data)
{
        struct net_device *netdev = data;
        struct iavf_adapter *adapter = netdev_priv(netdev);
        struct iavf_hw *hw = &adapter->hw;

        /* handle non-queue interrupts, these reads clear the registers */
        rd32(hw, IAVF_VFINT_ICR01);
        rd32(hw, IAVF_VFINT_ICR0_ENA1);

        if (adapter->state != __IAVF_REMOVE)
                /* schedule work on the private workqueue */
                queue_work(adapter->wq, &adapter->adminq_task);

        return IRQ_HANDLED;
}

/**
 * iavf_msix_clean_rings - MSIX mode Interrupt Handler
 * @irq: interrupt number
 * @data: pointer to a q_vector
 **/
static irqreturn_t iavf_msix_clean_rings(int irq, void *data)
{
        struct iavf_q_vector *q_vector = data;

        if (!q_vector->tx.ring && !q_vector->rx.ring)
                return IRQ_HANDLED;

        napi_schedule_irqoff(&q_vector->napi);

        return IRQ_HANDLED;
}

/**
 * iavf_map_vector_to_rxq - associate irqs with rx queues
 * @adapter: board private structure
 * @v_idx: interrupt number
 * @r_idx: queue number
 **/
static void
iavf_map_vector_to_rxq(struct iavf_adapter *adapter, int v_idx, int r_idx)
{
        struct iavf_q_vector *q_vector = &adapter->q_vectors[v_idx];
        struct iavf_ring *rx_ring = &adapter->rx_rings[r_idx];
        struct iavf_hw *hw = &adapter->hw;

        rx_ring->q_vector = q_vector;
        rx_ring->next = q_vector->rx.ring;
        rx_ring->vsi = &adapter->vsi;
        q_vector->rx.ring = rx_ring;
        q_vector->rx.count++;
        q_vector->rx.next_update = jiffies + 1;
        q_vector->rx.target_itr = ITR_TO_REG(rx_ring->itr_setting);
        q_vector->ring_mask |= BIT(r_idx);
        wr32(hw, IAVF_VFINT_ITRN1(IAVF_RX_ITR, q_vector->reg_idx),
             q_vector->rx.current_itr >> 1);
        q_vector->rx.current_itr = q_vector->rx.target_itr;
}

/**
 * iavf_map_vector_to_txq - associate irqs with tx queues
 * @adapter: board private structure
 * @v_idx: interrupt number
 * @t_idx: queue number
 **/
static void
iavf_map_vector_to_txq(struct iavf_adapter *adapter, int v_idx, int t_idx)
{
        struct iavf_q_vector *q_vector = &adapter->q_vectors[v_idx];
        struct iavf_ring *tx_ring = &adapter->tx_rings[t_idx];
        struct iavf_hw *hw = &adapter->hw;

        tx_ring->q_vector = q_vector;
        tx_ring->next = q_vector->tx.ring;
        tx_ring->vsi = &adapter->vsi;
        q_vector->tx.ring = tx_ring;
        q_vector->tx.count++;
        q_vector->tx.next_update = jiffies + 1;
        q_vector->tx.target_itr = ITR_TO_REG(tx_ring->itr_setting);
        q_vector->num_ringpairs++;
        wr32(hw, IAVF_VFINT_ITRN1(IAVF_TX_ITR, q_vector->reg_idx),
             q_vector->tx.target_itr >> 1);
        q_vector->tx.current_itr = q_vector->tx.target_itr;
}

/**
 * iavf_map_rings_to_vectors - Maps descriptor rings to vectors
 * @adapter: board private structure to initialize
 *
 * This function maps descriptor rings to the queue-specific vectors
 * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 * one vector per ring/queue, but on a constrained vector budget, we
 * group the rings as "efficiently" as possible.  You would add new
 * mapping configurations in here.
 **/
static void iavf_map_rings_to_vectors(struct iavf_adapter *adapter)
{
        int rings_remaining = adapter->num_active_queues;
        int ridx = 0, vidx = 0;
        int q_vectors;

        q_vectors = adapter->num_msix_vectors - NONQ_VECS;

        for (; ridx < rings_remaining; ridx++) {
                iavf_map_vector_to_rxq(adapter, vidx, ridx);
                iavf_map_vector_to_txq(adapter, vidx, ridx);

                /* In the case where we have more queues than vectors, continue
                 * round-robin on vectors until all queues are mapped.
                 */
                if (++vidx >= q_vectors)
                        vidx = 0;
        }

        adapter->aq_required |= IAVF_FLAG_AQ_MAP_VECTORS;
}

/**
 * iavf_request_traffic_irqs - Initialize MSI-X interrupts
 * @adapter: board private structure
 * @basename: device basename
 *
 * Allocates MSI-X vectors for tx and rx handling, and requests
 * interrupts from the kernel.
 **/
static int
iavf_request_traffic_irqs(struct iavf_adapter *adapter, char *basename)
{
        unsigned int vector, q_vectors;
        unsigned int rx_int_idx = 0, tx_int_idx = 0;
        int irq_num, err;

        iavf_irq_disable(adapter);
        /* Decrement for Other and TCP Timer vectors */
        q_vectors = adapter->num_msix_vectors - NONQ_VECS;

        for (vector = 0; vector < q_vectors; vector++) {
                struct iavf_q_vector *q_vector = &adapter->q_vectors[vector];

                irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;

                if (q_vector->tx.ring && q_vector->rx.ring) {
                        snprintf(q_vector->name, sizeof(q_vector->name),
                                 "iavf-%s-TxRx-%u", basename, rx_int_idx++);
                        tx_int_idx++;
                } else if (q_vector->rx.ring) {
                        snprintf(q_vector->name, sizeof(q_vector->name),
                                 "iavf-%s-rx-%u", basename, rx_int_idx++);
                } else if (q_vector->tx.ring) {
                        snprintf(q_vector->name, sizeof(q_vector->name),
                                 "iavf-%s-tx-%u", basename, tx_int_idx++);
                } else {
                        /* skip this unused q_vector */
                        continue;
                }
                err = request_irq(irq_num,
                                  iavf_msix_clean_rings,
                                  0,
                                  q_vector->name,
                                  q_vector);
                if (err) {
                        dev_info(&adapter->pdev->dev,
                                 "Request_irq failed, error: %d\n", err);
                        goto free_queue_irqs;
                }
        }

        return 0;

free_queue_irqs:
        while (vector) {
                vector--;
                irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
                free_irq(irq_num, &adapter->q_vectors[vector]);
        }
        return err;
}

/**
 * iavf_request_misc_irq - Initialize MSI-X interrupts
 * @adapter: board private structure
 *
 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 * vector is only for the admin queue, and stays active even when the netdev
 * is closed.
 **/
static int iavf_request_misc_irq(struct iavf_adapter *adapter)
{
        struct net_device *netdev = adapter->netdev;
        int err;

        snprintf(adapter->misc_vector_name,
                 sizeof(adapter->misc_vector_name) - 1, "iavf-%s:mbx",
                 dev_name(&adapter->pdev->dev));
        err = request_irq(adapter->msix_entries[0].vector,
                          &iavf_msix_aq, 0,
                          adapter->misc_vector_name, netdev);
        if (err) {
                dev_err(&adapter->pdev->dev,
                        "request_irq for %s failed: %d\n",
                        adapter->misc_vector_name, err);
                free_irq(adapter->msix_entries[0].vector, netdev);
        }
        return err;
}

/**
 * iavf_free_traffic_irqs - Free MSI-X interrupts
 * @adapter: board private structure
 *
 * Frees all MSI-X vectors other than 0.
 **/
static void iavf_free_traffic_irqs(struct iavf_adapter *adapter)
{
        struct iavf_q_vector *q_vector;
        int vector, irq_num, q_vectors;

        if (!adapter->msix_entries)
                return;

        q_vectors = adapter->num_msix_vectors - NONQ_VECS;

        for (vector = 0; vector < q_vectors; vector++) {
                q_vector = &adapter->q_vectors[vector];
                netif_napi_set_irq_locked(&q_vector->napi, -1);
                irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
                free_irq(irq_num, q_vector);
        }
}

/**
 * iavf_free_misc_irq - Free MSI-X miscellaneous vector
 * @adapter: board private structure
 *
 * Frees MSI-X vector 0.
 **/
static void iavf_free_misc_irq(struct iavf_adapter *adapter)
{
        struct net_device *netdev = adapter->netdev;

        if (!adapter->msix_entries)
                return;

        free_irq(adapter->msix_entries[0].vector, netdev);
}

/**
 * iavf_configure_tx - Configure Transmit Unit after Reset
 * @adapter: board private structure
 *
 * Configure the Tx unit of the MAC after a reset.
 **/
static void iavf_configure_tx(struct iavf_adapter *adapter)
{
        struct iavf_hw *hw = &adapter->hw;
        int i;

        for (i = 0; i < adapter->num_active_queues; i++)
                adapter->tx_rings[i].tail = hw->hw_addr + IAVF_QTX_TAIL1(i);
}

/**
 * iavf_select_rx_desc_format - Select Rx descriptor format
 * @adapter: adapter private structure
 *
 * Select what Rx descriptor format based on availability and enabled
 * features.
 *
 * Return: the desired RXDID to select for a given Rx queue, as defined by
 *         enum virtchnl_rxdid_format.
 */
static u8 iavf_select_rx_desc_format(const struct iavf_adapter *adapter)
{
        u64 rxdids = adapter->supp_rxdids;

        /* If we did not negotiate VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC, we must
         * stick with the default value of the legacy 32 byte format.
         */
        if (!IAVF_RXDID_ALLOWED(adapter))
                return VIRTCHNL_RXDID_1_32B_BASE;

        /* Rx timestamping requires the use of flexible NIC descriptors */
        if (iavf_ptp_cap_supported(adapter, VIRTCHNL_1588_PTP_CAP_RX_TSTAMP)) {
                if (rxdids & BIT(VIRTCHNL_RXDID_2_FLEX_SQ_NIC))
                        return VIRTCHNL_RXDID_2_FLEX_SQ_NIC;

                pci_warn(adapter->pdev,
                         "Unable to negotiate flexible descriptor format\n");
        }

        /* Warn if the PF does not list support for the default legacy
         * descriptor format. This shouldn't happen, as this is the format
         * used if VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC is not supported. It is
         * likely caused by a bug in the PF implementation failing to indicate
         * support for the format.
         */
        if (!(rxdids & VIRTCHNL_RXDID_1_32B_BASE_M))
                netdev_warn(adapter->netdev, "PF does not list support for default Rx descriptor format\n");

        return VIRTCHNL_RXDID_1_32B_BASE;
}

/**
 * iavf_configure_rx - Configure Receive Unit after Reset
 * @adapter: board private structure
 *
 * Configure the Rx unit of the MAC after a reset.
 **/
static void iavf_configure_rx(struct iavf_adapter *adapter)
{
        struct iavf_hw *hw = &adapter->hw;

        adapter->rxdid = iavf_select_rx_desc_format(adapter);

        for (u32 i = 0; i < adapter->num_active_queues; i++) {
                adapter->rx_rings[i].tail = hw->hw_addr + IAVF_QRX_TAIL1(i);
                adapter->rx_rings[i].rxdid = adapter->rxdid;
        }
}

/**
 * iavf_find_vlan - Search filter list for specific vlan filter
 * @adapter: board private structure
 * @vlan: vlan tag
 *
 * Returns ptr to the filter object or NULL. Must be called while holding the
 * mac_vlan_list_lock.
 **/
static struct
iavf_vlan_filter *iavf_find_vlan(struct iavf_adapter *adapter,
                                 struct iavf_vlan vlan)
{
        struct iavf_vlan_filter *f;

        list_for_each_entry(f, &adapter->vlan_filter_list, list) {
                if (f->vlan.vid == vlan.vid &&
                    f->vlan.tpid == vlan.tpid)
                        return f;
        }

        return NULL;
}

/**
 * iavf_add_vlan - Add a vlan filter to the list
 * @adapter: board private structure
 * @vlan: VLAN tag
 *
 * Returns ptr to the filter object or NULL when no memory available.
 **/
static struct
iavf_vlan_filter *iavf_add_vlan(struct iavf_adapter *adapter,
                                struct iavf_vlan vlan)
{
        struct iavf_vlan_filter *f = NULL;

        spin_lock_bh(&adapter->mac_vlan_list_lock);

        f = iavf_find_vlan(adapter, vlan);
        if (!f) {
                f = kzalloc_obj(*f, GFP_ATOMIC);
                if (!f)
                        goto clearout;

                f->vlan = vlan;

                list_add_tail(&f->list, &adapter->vlan_filter_list);
                f->state = IAVF_VLAN_ADD;
                adapter->num_vlan_filters++;
                iavf_schedule_aq_request(adapter, IAVF_FLAG_AQ_ADD_VLAN_FILTER);
        } else if (f->state == IAVF_VLAN_REMOVE) {
                /* Re-add the filter since we cannot tell whether the
                 * pending delete has already been processed by the PF.
                 * A duplicate add is harmless.
                 */
                f->state = IAVF_VLAN_ADD;
                iavf_schedule_aq_request(adapter,
                                         IAVF_FLAG_AQ_ADD_VLAN_FILTER);
        }

clearout:
        spin_unlock_bh(&adapter->mac_vlan_list_lock);
        return f;
}

/**
 * iavf_del_vlan - Remove a vlan filter from the list
 * @adapter: board private structure
 * @vlan: VLAN tag
 **/
static void iavf_del_vlan(struct iavf_adapter *adapter, struct iavf_vlan vlan)
{
        struct iavf_vlan_filter *f;

        spin_lock_bh(&adapter->mac_vlan_list_lock);

        f = iavf_find_vlan(adapter, vlan);
        if (f) {
                /* IAVF_ADD_VLAN means that VLAN wasn't even added yet.
                 * Remove it from the list.
                 */
                if (f->state == IAVF_VLAN_ADD) {
                        list_del(&f->list);
                        kfree(f);
                        adapter->num_vlan_filters--;
                } else {
                        f->state = IAVF_VLAN_REMOVE;
                        iavf_schedule_aq_request(adapter,
                                                 IAVF_FLAG_AQ_DEL_VLAN_FILTER);
                }
        }

        spin_unlock_bh(&adapter->mac_vlan_list_lock);
}

/**
 * iavf_restore_filters
 * @adapter: board private structure
 *
 * Restore existing non MAC filters when VF netdev comes back up
 **/
static void iavf_restore_filters(struct iavf_adapter *adapter)
{
        struct iavf_vlan_filter *f;

        /* re-add all VLAN filters */
        spin_lock_bh(&adapter->mac_vlan_list_lock);

        list_for_each_entry(f, &adapter->vlan_filter_list, list) {
                if (f->state == IAVF_VLAN_INACTIVE)
                        f->state = IAVF_VLAN_ADD;
        }

        spin_unlock_bh(&adapter->mac_vlan_list_lock);
        adapter->aq_required |= IAVF_FLAG_AQ_ADD_VLAN_FILTER;
}

/**
 * iavf_get_num_vlans_added - get number of VLANs added
 * @adapter: board private structure
 */
u16 iavf_get_num_vlans_added(struct iavf_adapter *adapter)
{
        return adapter->num_vlan_filters;
}

/**
 * iavf_get_max_vlans_allowed - get maximum VLANs allowed for this VF
 * @adapter: board private structure
 *
 * This depends on the negotiated VLAN capability. For VIRTCHNL_VF_OFFLOAD_VLAN,
 * do not impose a limit as that maintains current behavior and for
 * VIRTCHNL_VF_OFFLOAD_VLAN_V2, use the maximum allowed sent from the PF.
 **/
static u16 iavf_get_max_vlans_allowed(struct iavf_adapter *adapter)
{
        /* don't impose any limit for VIRTCHNL_VF_OFFLOAD_VLAN since there has
         * never been a limit on the VF driver side
         */
        if (VLAN_ALLOWED(adapter))
                return VLAN_N_VID;
        else if (VLAN_V2_ALLOWED(adapter))
                return adapter->vlan_v2_caps.filtering.max_filters;

        return 0;
}

/**
 * iavf_max_vlans_added - check if maximum VLANs allowed already exist
 * @adapter: board private structure
 **/
static bool iavf_max_vlans_added(struct iavf_adapter *adapter)
{
        if (iavf_get_num_vlans_added(adapter) <
            iavf_get_max_vlans_allowed(adapter))
                return false;

        return true;
}

/**
 * iavf_vlan_rx_add_vid - Add a VLAN filter to a device
 * @netdev: network device struct
 * @proto: unused protocol data
 * @vid: VLAN tag
 **/
static int iavf_vlan_rx_add_vid(struct net_device *netdev,
                                __always_unused __be16 proto, u16 vid)
{
        struct iavf_adapter *adapter = netdev_priv(netdev);

        /* Do not track VLAN 0 filter, always added by the PF on VF init */
        if (!vid)
                return 0;

        if (!VLAN_FILTERING_ALLOWED(adapter))
                return -EIO;

        if (iavf_max_vlans_added(adapter)) {
                netdev_err(netdev, "Max allowed VLAN filters %u. Remove existing VLANs or disable filtering via Ethtool if supported.\n",
                           iavf_get_max_vlans_allowed(adapter));
                return -EIO;
        }

        if (!iavf_add_vlan(adapter, IAVF_VLAN(vid, be16_to_cpu(proto))))
                return -ENOMEM;

        return 0;
}

/**
 * iavf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 * @netdev: network device struct
 * @proto: unused protocol data
 * @vid: VLAN tag
 **/
static int iavf_vlan_rx_kill_vid(struct net_device *netdev,
                                 __always_unused __be16 proto, u16 vid)
{
        struct iavf_adapter *adapter = netdev_priv(netdev);

        /* We do not track VLAN 0 filter */
        if (!vid)
                return 0;

        iavf_del_vlan(adapter, IAVF_VLAN(vid, be16_to_cpu(proto)));
        return 0;
}

/**
 * iavf_find_filter - Search filter list for specific mac filter
 * @adapter: board private structure
 * @macaddr: the MAC address
 *
 * Returns ptr to the filter object or NULL. Must be called while holding the
 * mac_vlan_list_lock.
 **/
static struct
iavf_mac_filter *iavf_find_filter(struct iavf_adapter *adapter,
                                  const u8 *macaddr)
{
        struct iavf_mac_filter *f;

        if (!macaddr)
                return NULL;

        list_for_each_entry(f, &adapter->mac_filter_list, list) {
                if (ether_addr_equal(macaddr, f->macaddr))
                        return f;
        }
        return NULL;
}

/**
 * iavf_add_filter - Add a mac filter to the filter list
 * @adapter: board private structure
 * @macaddr: the MAC address
 *
 * Returns ptr to the filter object or NULL when no memory available.
 **/
struct iavf_mac_filter *iavf_add_filter(struct iavf_adapter *adapter,
                                        const u8 *macaddr)
{
        struct iavf_mac_filter *f;

        if (!macaddr)
                return NULL;

        f = iavf_find_filter(adapter, macaddr);
        if (!f) {
                f = kzalloc_obj(*f, GFP_ATOMIC);
                if (!f)
                        return f;

                ether_addr_copy(f->macaddr, macaddr);

                list_add_tail(&f->list, &adapter->mac_filter_list);
                f->add = true;
                f->add_handled = false;
                f->is_new_mac = true;
                f->is_primary = ether_addr_equal(macaddr, adapter->hw.mac.addr);
                adapter->aq_required |= IAVF_FLAG_AQ_ADD_MAC_FILTER;
        } else {
                f->remove = false;
        }

        return f;
}

/**
 * iavf_replace_primary_mac - Replace current primary address
 * @adapter: board private structure
 * @new_mac: new MAC address to be applied
 *
 * Replace current dev_addr and send request to PF for removal of previous
 * primary MAC address filter and addition of new primary MAC filter.
 * Return 0 for success, -ENOMEM for failure.
 *
 * Do not call this with mac_vlan_list_lock!
 **/
static int iavf_replace_primary_mac(struct iavf_adapter *adapter,
                                    const u8 *new_mac)
{
        struct iavf_hw *hw = &adapter->hw;
        struct iavf_mac_filter *new_f;
        struct iavf_mac_filter *old_f;

        spin_lock_bh(&adapter->mac_vlan_list_lock);

        new_f = iavf_add_filter(adapter, new_mac);
        if (!new_f) {
                spin_unlock_bh(&adapter->mac_vlan_list_lock);
                return -ENOMEM;
        }

        old_f = iavf_find_filter(adapter, hw->mac.addr);
        if (old_f) {
                old_f->is_primary = false;
                old_f->remove = true;
                adapter->aq_required |= IAVF_FLAG_AQ_DEL_MAC_FILTER;
        }
        /* Always send the request to add if changing primary MAC,
         * even if filter is already present on the list
         */
        new_f->is_primary = true;
        new_f->add = true;
        ether_addr_copy(hw->mac.addr, new_mac);

        spin_unlock_bh(&adapter->mac_vlan_list_lock);

        /* schedule the watchdog task to immediately process the request */
        iavf_schedule_aq_request(adapter, IAVF_FLAG_AQ_ADD_MAC_FILTER);
        return 0;
}

/**
 * iavf_is_mac_set_handled - wait for a response to set MAC from PF
 * @netdev: network interface device structure
 * @macaddr: MAC address to set
 *
 * Returns true on success, false on failure
 */
static bool iavf_is_mac_set_handled(struct net_device *netdev,
                                    const u8 *macaddr)
{
        struct iavf_adapter *adapter = netdev_priv(netdev);
        struct iavf_mac_filter *f;
        bool ret = false;

        spin_lock_bh(&adapter->mac_vlan_list_lock);

        f = iavf_find_filter(adapter, macaddr);

        if (!f || (!f->add && f->add_handled))
                ret = true;

        spin_unlock_bh(&adapter->mac_vlan_list_lock);

        return ret;
}

/**
 * iavf_set_mac - NDO callback to set port MAC address
 * @netdev: network interface device structure
 * @p: pointer to an address structure
 *
 * Returns 0 on success, negative on failure
 */
static int iavf_set_mac(struct net_device *netdev, void *p)
{
        struct iavf_adapter *adapter = netdev_priv(netdev);
        struct sockaddr *addr = p;
        int ret;

        if (!is_valid_ether_addr(addr->sa_data))
                return -EADDRNOTAVAIL;

        ret = iavf_replace_primary_mac(adapter, addr->sa_data);

        if (ret)
                return ret;

        ret = wait_event_interruptible_timeout(adapter->vc_waitqueue,
                                               iavf_is_mac_set_handled(netdev, addr->sa_data),
                                               msecs_to_jiffies(2500));

        /* If ret < 0 then it means wait was interrupted.
         * If ret == 0 then it means we got a timeout.
         * else it means we got response for set MAC from PF,
         * check if netdev MAC was updated to requested MAC,
         * if yes then set MAC succeeded otherwise it failed return -EACCES
         */
        if (ret < 0)
                return ret;

        if (!ret)
                return -EAGAIN;

        if (!ether_addr_equal(netdev->dev_addr, addr->sa_data))
                return -EACCES;

        return 0;
}

/**
 * iavf_addr_sync - Callback for dev_(mc|uc)_sync to add address
 * @netdev: the netdevice
 * @addr: address to add
 *
 * Called by __dev_(mc|uc)_sync when an address needs to be added. We call
 * __dev_(uc|mc)_sync from .set_rx_mode and guarantee to hold the hash lock.
 */
static int iavf_addr_sync(struct net_device *netdev, const u8 *addr)
{
        struct iavf_adapter *adapter = netdev_priv(netdev);

        if (iavf_add_filter(adapter, addr))
                return 0;
        else
                return -ENOMEM;
}

/**
 * iavf_addr_unsync - Callback for dev_(mc|uc)_sync to remove address
 * @netdev: the netdevice
 * @addr: address to add
 *
 * Called by __dev_(mc|uc)_sync when an address needs to be removed. We call
 * __dev_(uc|mc)_sync from .set_rx_mode and guarantee to hold the hash lock.
 */
static int iavf_addr_unsync(struct net_device *netdev, const u8 *addr)
{
        struct iavf_adapter *adapter = netdev_priv(netdev);
        struct iavf_mac_filter *f;

        /* Under some circumstances, we might receive a request to delete
         * our own device address from our uc list. Because we store the
         * device address in the VSI's MAC/VLAN filter list, we need to ignore
         * such requests and not delete our device address from this list.
         */
        if (ether_addr_equal(addr, netdev->dev_addr))
                return 0;

        f = iavf_find_filter(adapter, addr);
        if (f) {
                f->remove = true;
                adapter->aq_required |= IAVF_FLAG_AQ_DEL_MAC_FILTER;
        }
        return 0;
}

/**
 * iavf_promiscuous_mode_changed - check if promiscuous mode bits changed
 * @adapter: device specific adapter
 */
bool iavf_promiscuous_mode_changed(struct iavf_adapter *adapter)
{
        return (adapter->current_netdev_promisc_flags ^ adapter->netdev->flags) &
                (IFF_PROMISC | IFF_ALLMULTI);
}

/**
 * iavf_set_rx_mode - NDO callback to set the netdev filters
 * @netdev: network interface device structure
 **/
static void iavf_set_rx_mode(struct net_device *netdev)
{
        struct iavf_adapter *adapter = netdev_priv(netdev);

        spin_lock_bh(&adapter->mac_vlan_list_lock);
        __dev_uc_sync(netdev, iavf_addr_sync, iavf_addr_unsync);
        __dev_mc_sync(netdev, iavf_addr_sync, iavf_addr_unsync);
        spin_unlock_bh(&adapter->mac_vlan_list_lock);

        spin_lock_bh(&adapter->current_netdev_promisc_flags_lock);
        if (iavf_promiscuous_mode_changed(adapter))
                adapter->aq_required |= IAVF_FLAG_AQ_CONFIGURE_PROMISC_MODE;
        spin_unlock_bh(&adapter->current_netdev_promisc_flags_lock);
}

/**
 * iavf_napi_enable_all - enable NAPI on all queue vectors
 * @adapter: board private structure
 **/
static void iavf_napi_enable_all(struct iavf_adapter *adapter)
{
        int q_idx;
        struct iavf_q_vector *q_vector;
        int q_vectors = adapter->num_msix_vectors - NONQ_VECS;

        for (q_idx = 0; q_idx < q_vectors; q_idx++) {
                struct napi_struct *napi;

                q_vector = &adapter->q_vectors[q_idx];
                napi = &q_vector->napi;
                napi_enable_locked(napi);
        }
}

/**
 * iavf_napi_disable_all - disable NAPI on all queue vectors
 * @adapter: board private structure
 **/
static void iavf_napi_disable_all(struct iavf_adapter *adapter)
{
        int q_idx;
        struct iavf_q_vector *q_vector;
        int q_vectors = adapter->num_msix_vectors - NONQ_VECS;

        for (q_idx = 0; q_idx < q_vectors; q_idx++) {
                q_vector = &adapter->q_vectors[q_idx];
                napi_disable_locked(&q_vector->napi);
        }
}

/**
 * iavf_configure - set up transmit and receive data structures
 * @adapter: board private structure
 **/
static void iavf_configure(struct iavf_adapter *adapter)
{
        struct net_device *netdev = adapter->netdev;
        int i;

        iavf_set_rx_mode(netdev);

        iavf_configure_tx(adapter);
        iavf_configure_rx(adapter);
        adapter->aq_required |= IAVF_FLAG_AQ_CONFIGURE_QUEUES;

        for (i = 0; i < adapter->num_active_queues; i++) {
                struct iavf_ring *ring = &adapter->rx_rings[i];

                iavf_alloc_rx_buffers(ring, IAVF_DESC_UNUSED(ring));
        }
}

/**
 * iavf_up_complete - Finish the last steps of bringing up a connection
 * @adapter: board private structure
 */
static void iavf_up_complete(struct iavf_adapter *adapter)
{
        netdev_assert_locked(adapter->netdev);

        iavf_change_state(adapter, __IAVF_RUNNING);
        clear_bit(__IAVF_VSI_DOWN, adapter->vsi.state);

        iavf_napi_enable_all(adapter);

        iavf_schedule_aq_request(adapter, IAVF_FLAG_AQ_ENABLE_QUEUES);
}

/**
 * iavf_clear_mac_vlan_filters - Remove mac and vlan filters not sent to PF
 * yet and mark other to be removed.
 * @adapter: board private structure
 **/
static void iavf_clear_mac_vlan_filters(struct iavf_adapter *adapter)
{
        struct iavf_vlan_filter *vlf, *vlftmp;
        struct iavf_mac_filter *f, *ftmp;

        spin_lock_bh(&adapter->mac_vlan_list_lock);
        /* clear the sync flag on all filters */
        __dev_uc_unsync(adapter->netdev, NULL);
        __dev_mc_unsync(adapter->netdev, NULL);

        /* remove all MAC filters */
        list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
                                 list) {
                if (f->add) {
                        list_del(&f->list);
                        kfree(f);
                } else {
                        f->remove = true;
                }
        }

        /* disable all VLAN filters */
        list_for_each_entry_safe(vlf, vlftmp, &adapter->vlan_filter_list,
                                 list)
                vlf->state = IAVF_VLAN_DISABLE;

        spin_unlock_bh(&adapter->mac_vlan_list_lock);
}

/**
 * iavf_clear_cloud_filters - Remove cloud filters not sent to PF yet and
 * mark other to be removed.
 * @adapter: board private structure
 **/
static void iavf_clear_cloud_filters(struct iavf_adapter *adapter)
{
        struct iavf_cloud_filter *cf, *cftmp;

        /* remove all cloud filters */
        spin_lock_bh(&adapter->cloud_filter_list_lock);
        list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list,
                                 list) {
                if (cf->add) {
                        list_del(&cf->list);
                        kfree(cf);
                        adapter->num_cloud_filters--;
                } else {
                        cf->del = true;
                }
        }
        spin_unlock_bh(&adapter->cloud_filter_list_lock);
}

/**
 * iavf_clear_fdir_filters - Remove fdir filters not sent to PF yet and mark
 * other to be removed.
 * @adapter: board private structure
 **/
static void iavf_clear_fdir_filters(struct iavf_adapter *adapter)
{
        struct iavf_fdir_fltr *fdir;

        /* remove all Flow Director filters */
        spin_lock_bh(&adapter->fdir_fltr_lock);
        list_for_each_entry(fdir, &adapter->fdir_list_head, list) {
                if (fdir->state == IAVF_FDIR_FLTR_ADD_REQUEST) {
                        /* Cancel a request, keep filter as inactive */
                        fdir->state = IAVF_FDIR_FLTR_INACTIVE;
                } else if (fdir->state == IAVF_FDIR_FLTR_ADD_PENDING ||
                         fdir->state == IAVF_FDIR_FLTR_ACTIVE) {
                        /* Disable filters which are active or have a pending
                         * request to PF to be added
                         */
                        fdir->state = IAVF_FDIR_FLTR_DIS_REQUEST;
                }
        }
        spin_unlock_bh(&adapter->fdir_fltr_lock);
}

/**
 * iavf_clear_adv_rss_conf - Remove adv rss conf not sent to PF yet and mark
 * other to be removed.
 * @adapter: board private structure
 **/
static void iavf_clear_adv_rss_conf(struct iavf_adapter *adapter)
{
        struct iavf_adv_rss *rss, *rsstmp;

        /* remove all advance RSS configuration */
        spin_lock_bh(&adapter->adv_rss_lock);
        list_for_each_entry_safe(rss, rsstmp, &adapter->adv_rss_list_head,
                                 list) {
                if (rss->state == IAVF_ADV_RSS_ADD_REQUEST) {
                        list_del(&rss->list);
                        kfree(rss);
                } else {
                        rss->state = IAVF_ADV_RSS_DEL_REQUEST;
                }
        }
        spin_unlock_bh(&adapter->adv_rss_lock);
}

/**
 * iavf_down - Shutdown the connection processing
 * @adapter: board private structure
 */
void iavf_down(struct iavf_adapter *adapter)
{
        struct net_device *netdev = adapter->netdev;

        netdev_assert_locked(netdev);

        if (adapter->state <= __IAVF_DOWN_PENDING)
                return;

        netif_carrier_off(netdev);
        netif_tx_disable(netdev);
        adapter->link_up = false;
        iavf_napi_disable_all(adapter);
        iavf_irq_disable(adapter);

        iavf_clear_mac_vlan_filters(adapter);
        iavf_clear_cloud_filters(adapter);
        iavf_clear_fdir_filters(adapter);
        iavf_clear_adv_rss_conf(adapter);

        if (adapter->flags & IAVF_FLAG_PF_COMMS_FAILED)
                return;

        if (!test_bit(__IAVF_IN_REMOVE_TASK, &adapter->crit_section)) {
                /* cancel any current operation */
                adapter->current_op = VIRTCHNL_OP_UNKNOWN;
                /* Schedule operations to close down the HW. Don't wait
                 * here for this to complete. The watchdog is still running
                 * and it will take care of this.
                 */
                if (!list_empty(&adapter->mac_filter_list))
                        adapter->aq_required |= IAVF_FLAG_AQ_DEL_MAC_FILTER;
                if (!list_empty(&adapter->vlan_filter_list))
                        adapter->aq_required |= IAVF_FLAG_AQ_DEL_VLAN_FILTER;
                if (!list_empty(&adapter->cloud_filter_list))
                        adapter->aq_required |= IAVF_FLAG_AQ_DEL_CLOUD_FILTER;
                if (!list_empty(&adapter->fdir_list_head))
                        adapter->aq_required |= IAVF_FLAG_AQ_DEL_FDIR_FILTER;
                if (!list_empty(&adapter->adv_rss_list_head))
                        adapter->aq_required |= IAVF_FLAG_AQ_DEL_ADV_RSS_CFG;
        }

        iavf_schedule_aq_request(adapter, IAVF_FLAG_AQ_DISABLE_QUEUES);
}

/**
 * iavf_acquire_msix_vectors - Setup the MSIX capability
 * @adapter: board private structure
 * @vectors: number of vectors to request
 *
 * Work with the OS to set up the MSIX vectors needed.
 *
 * Returns 0 on success, negative on failure
 **/
static int
iavf_acquire_msix_vectors(struct iavf_adapter *adapter, int vectors)
{
        int err, vector_threshold;

        /* We'll want at least 3 (vector_threshold):
         * 0) Other (Admin Queue and link, mostly)
         * 1) TxQ[0] Cleanup
         * 2) RxQ[0] Cleanup
         */
        vector_threshold = MIN_MSIX_COUNT;

        /* The more we get, the more we will assign to Tx/Rx Cleanup
         * for the separate queues...where Rx Cleanup >= Tx Cleanup.
         * Right now, we simply care about how many we'll get; we'll
         * set them up later while requesting irq's.
         */
        err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
                                    vector_threshold, vectors);
        if (err < 0) {
                dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
                kfree(adapter->msix_entries);
                adapter->msix_entries = NULL;
                return err;
        }

        /* Adjust for only the vectors we'll use, which is minimum
         * of max_msix_q_vectors + NONQ_VECS, or the number of
         * vectors we were allocated.
         */
        adapter->num_msix_vectors = err;
        return 0;
}

/**
 * iavf_free_queues - Free memory for all rings
 * @adapter: board private structure to initialize
 *
 * Free all of the memory associated with queue pairs.
 **/
static void iavf_free_queues(struct iavf_adapter *adapter)
{
        if (!adapter->vsi_res)
                return;
        adapter->num_active_queues = 0;
        kfree(adapter->tx_rings);
        adapter->tx_rings = NULL;
        kfree(adapter->rx_rings);
        adapter->rx_rings = NULL;
}

/**
 * iavf_set_queue_vlan_tag_loc - set location for VLAN tag offload
 * @adapter: board private structure
 *
 * Based on negotiated capabilities, the VLAN tag needs to be inserted and/or
 * stripped in certain descriptor fields. Instead of checking the offload
 * capability bits in the hot path, cache the location the ring specific
 * flags.
 */
void iavf_set_queue_vlan_tag_loc(struct iavf_adapter *adapter)
{
        int i;

        for (i = 0; i < adapter->num_active_queues; i++) {
                struct iavf_ring *tx_ring = &adapter->tx_rings[i];
                struct iavf_ring *rx_ring = &adapter->rx_rings[i];

                /* prevent multiple L2TAG bits being set after VFR */
                tx_ring->flags &=
                        ~(IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1 |
                          IAVF_TXR_FLAGS_VLAN_TAG_LOC_L2TAG2);
                rx_ring->flags &=
                        ~(IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1 |
                          IAVF_RXR_FLAGS_VLAN_TAG_LOC_L2TAG2_2);

                if (VLAN_ALLOWED(adapter)) {
                        tx_ring->flags |= IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1;
                        rx_ring->flags |= IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1;
                } else if (VLAN_V2_ALLOWED(adapter)) {
                        struct virtchnl_vlan_supported_caps *stripping_support;
                        struct virtchnl_vlan_supported_caps *insertion_support;

                        stripping_support =
                                &adapter->vlan_v2_caps.offloads.stripping_support;
                        insertion_support =
                                &adapter->vlan_v2_caps.offloads.insertion_support;

                        if (stripping_support->outer) {
                                if (stripping_support->outer &
                                    VIRTCHNL_VLAN_TAG_LOCATION_L2TAG1)
                                        rx_ring->flags |=
                                                IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1;
                                else if (stripping_support->outer &
                                         VIRTCHNL_VLAN_TAG_LOCATION_L2TAG2_2)
                                        rx_ring->flags |=
                                                IAVF_RXR_FLAGS_VLAN_TAG_LOC_L2TAG2_2;
                        } else if (stripping_support->inner) {
                                if (stripping_support->inner &
                                    VIRTCHNL_VLAN_TAG_LOCATION_L2TAG1)
                                        rx_ring->flags |=
                                                IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1;
                                else if (stripping_support->inner &
                                         VIRTCHNL_VLAN_TAG_LOCATION_L2TAG2_2)
                                        rx_ring->flags |=
                                                IAVF_RXR_FLAGS_VLAN_TAG_LOC_L2TAG2_2;
                        }

                        if (insertion_support->outer) {
                                if (insertion_support->outer &
                                    VIRTCHNL_VLAN_TAG_LOCATION_L2TAG1)
                                        tx_ring->flags |=
                                                IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1;
                                else if (insertion_support->outer &
                                         VIRTCHNL_VLAN_TAG_LOCATION_L2TAG2)
                                        tx_ring->flags |=
                                                IAVF_TXR_FLAGS_VLAN_TAG_LOC_L2TAG2;
                        } else if (insertion_support->inner) {
                                if (insertion_support->inner &
                                    VIRTCHNL_VLAN_TAG_LOCATION_L2TAG1)
                                        tx_ring->flags |=
                                                IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1;
                                else if (insertion_support->inner &
                                         VIRTCHNL_VLAN_TAG_LOCATION_L2TAG2)
                                        tx_ring->flags |=
                                                IAVF_TXR_FLAGS_VLAN_TAG_LOC_L2TAG2;
                        }
                }
        }
}

/**
 * iavf_alloc_queues - Allocate memory for all rings
 * @adapter: board private structure to initialize
 *
 * We allocate one ring per queue at run-time since we don't know the
 * number of queues at compile-time.  The polling_netdev array is
 * intended for Multiqueue, but should work fine with a single queue.
 **/
static int iavf_alloc_queues(struct iavf_adapter *adapter)
{
        int i, num_active_queues;

        /* If we're in reset reallocating queues we don't actually know yet for
         * certain the PF gave us the number of queues we asked for but we'll
         * assume it did.  Once basic reset is finished we'll confirm once we
         * start negotiating config with PF.
         */
        if (adapter->num_req_queues)
                num_active_queues = adapter->num_req_queues;
        else if ((adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) &&
                 adapter->num_tc)
                num_active_queues = adapter->ch_config.total_qps;
        else
                num_active_queues = min_t(int,
                                          adapter->vsi_res->num_queue_pairs,
                                          (int)(num_online_cpus()));


        adapter->tx_rings = kzalloc_objs(struct iavf_ring, num_active_queues);
        if (!adapter->tx_rings)
                goto err_out;
        adapter->rx_rings = kzalloc_objs(struct iavf_ring, num_active_queues);
        if (!adapter->rx_rings)
                goto err_out;

        for (i = 0; i < num_active_queues; i++) {
                struct iavf_ring *tx_ring;
                struct iavf_ring *rx_ring;

                tx_ring = &adapter->tx_rings[i];

                tx_ring->queue_index = i;
                tx_ring->netdev = adapter->netdev;
                tx_ring->dev = &adapter->pdev->dev;
                tx_ring->count = adapter->tx_desc_count;
                tx_ring->itr_setting = IAVF_ITR_TX_DEF;
                if (adapter->flags & IAVF_FLAG_WB_ON_ITR_CAPABLE)
                        tx_ring->flags |= IAVF_TXR_FLAGS_WB_ON_ITR;

                rx_ring = &adapter->rx_rings[i];
                rx_ring->queue_index = i;
                rx_ring->netdev = adapter->netdev;
                rx_ring->count = adapter->rx_desc_count;
                rx_ring->itr_setting = IAVF_ITR_RX_DEF;
        }

        adapter->num_active_queues = num_active_queues;

        iavf_set_queue_vlan_tag_loc(adapter);

        return 0;

err_out:
        iavf_free_queues(adapter);
        return -ENOMEM;
}

/**
 * iavf_set_interrupt_capability - set MSI-X or FAIL if not supported
 * @adapter: board private structure to initialize
 *
 * Attempt to configure the interrupts using the best available
 * capabilities of the hardware and the kernel.
 **/
static int iavf_set_interrupt_capability(struct iavf_adapter *adapter)
{
        int vector, v_budget;
        int pairs = 0;
        int err = 0;

        if (!adapter->vsi_res) {
                err = -EIO;
                goto out;
        }
        pairs = adapter->num_active_queues;

        /* It's easy to be greedy for MSI-X vectors, but it really doesn't do
         * us much good if we have more vectors than CPUs. However, we already
         * limit the total number of queues by the number of CPUs so we do not
         * need any further limiting here.
         */
        v_budget = min_t(int, pairs + NONQ_VECS,
                         (int)adapter->vf_res->max_vectors);

        adapter->msix_entries = kzalloc_objs(struct msix_entry, v_budget);
        if (!adapter->msix_entries) {
                err = -ENOMEM;
                goto out;
        }

        for (vector = 0; vector < v_budget; vector++)
                adapter->msix_entries[vector].entry = vector;

        err = iavf_acquire_msix_vectors(adapter, v_budget);
        if (!err)
                iavf_schedule_finish_config(adapter);

out:
        return err;
}

/**
 * iavf_config_rss_aq - Configure RSS keys and lut by using AQ commands
 * @adapter: board private structure
 *
 * Return 0 on success, negative on failure
 **/
static int iavf_config_rss_aq(struct iavf_adapter *adapter)
{
        struct iavf_aqc_get_set_rss_key_data *rss_key =
                (struct iavf_aqc_get_set_rss_key_data *)adapter->rss_key;
        struct iavf_hw *hw = &adapter->hw;
        enum iavf_status status;

        if (adapter->current_op != VIRTCHNL_OP_UNKNOWN) {
                /* bail because we already have a command pending */
                dev_err(&adapter->pdev->dev, "Cannot configure RSS, command %d pending\n",
                        adapter->current_op);
                return -EBUSY;
        }

        status = iavf_aq_set_rss_key(hw, adapter->vsi.id, rss_key);
        if (status) {
                dev_err(&adapter->pdev->dev, "Cannot set RSS key, err %s aq_err %s\n",
                        iavf_stat_str(hw, status),
                        libie_aq_str(hw->aq.asq_last_status));
                return iavf_status_to_errno(status);

        }

        status = iavf_aq_set_rss_lut(hw, adapter->vsi.id, false,
                                     adapter->rss_lut, adapter->rss_lut_size);
        if (status) {
                dev_err(&adapter->pdev->dev, "Cannot set RSS lut, err %s aq_err %s\n",
                        iavf_stat_str(hw, status),
                        libie_aq_str(hw->aq.asq_last_status));
                return iavf_status_to_errno(status);
        }

        return 0;

}

/**
 * iavf_config_rss_reg - Configure RSS keys and lut by writing registers
 * @adapter: board private structure
 *
 * Returns 0 on success, negative on failure
 **/
static int iavf_config_rss_reg(struct iavf_adapter *adapter)
{
        struct iavf_hw *hw = &adapter->hw;
        u32 *dw;
        u16 i;

        dw = (u32 *)adapter->rss_key;
        for (i = 0; i < adapter->rss_key_size / 4; i++)
                wr32(hw, IAVF_VFQF_HKEY(i), dw[i]);

        dw = (u32 *)adapter->rss_lut;
        for (i = 0; i < adapter->rss_lut_size / 4; i++)
                wr32(hw, IAVF_VFQF_HLUT(i), dw[i]);

        iavf_flush(hw);

        return 0;
}

/**
 * iavf_config_rss - Configure RSS keys and lut
 * @adapter: board private structure
 *
 * Returns 0 on success, negative on failure
 **/
int iavf_config_rss(struct iavf_adapter *adapter)
{

        if (RSS_PF(adapter)) {
                adapter->aq_required |= IAVF_FLAG_AQ_SET_RSS_LUT |
                                        IAVF_FLAG_AQ_SET_RSS_KEY;
                return 0;
        } else if (RSS_AQ(adapter)) {
                return iavf_config_rss_aq(adapter);
        } else {
                return iavf_config_rss_reg(adapter);
        }
}

/**
 * iavf_fill_rss_lut - Fill the lut with default values
 * @adapter: board private structure
 **/
static void iavf_fill_rss_lut(struct iavf_adapter *adapter)
{
        u16 i;

        for (i = 0; i < adapter->rss_lut_size; i++)
                adapter->rss_lut[i] = i % adapter->num_active_queues;
}

/**
 * iavf_init_rss - Prepare for RSS
 * @adapter: board private structure
 *
 * Return 0 on success, negative on failure
 **/
static int iavf_init_rss(struct iavf_adapter *adapter)
{
        struct iavf_hw *hw = &adapter->hw;

        if (!RSS_PF(adapter)) {
                /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
                if (adapter->vf_res->vf_cap_flags &
                    VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2)
                        adapter->rss_hashcfg =
                                IAVF_DEFAULT_RSS_HASHCFG_EXPANDED;
                else
                        adapter->rss_hashcfg = IAVF_DEFAULT_RSS_HASHCFG;

                wr32(hw, IAVF_VFQF_HENA(0), (u32)adapter->rss_hashcfg);
                wr32(hw, IAVF_VFQF_HENA(1), (u32)(adapter->rss_hashcfg >> 32));
        }

        iavf_fill_rss_lut(adapter);
        netdev_rss_key_fill((void *)adapter->rss_key, adapter->rss_key_size);

        return iavf_config_rss(adapter);
}

/**
 * iavf_alloc_q_vectors - Allocate memory for interrupt vectors
 * @adapter: board private structure to initialize
 *
 * We allocate one q_vector per queue interrupt.  If allocation fails we
 * return -ENOMEM.
 **/
static int iavf_alloc_q_vectors(struct iavf_adapter *adapter)
{
        int q_idx = 0, num_q_vectors, irq_num;
        struct iavf_q_vector *q_vector;

        num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
        adapter->q_vectors = kzalloc_objs(*q_vector, num_q_vectors);
        if (!adapter->q_vectors)
                return -ENOMEM;

        for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
                irq_num = adapter->msix_entries[q_idx + NONQ_VECS].vector;
                q_vector = &adapter->q_vectors[q_idx];
                q_vector->adapter = adapter;
                q_vector->vsi = &adapter->vsi;
                q_vector->v_idx = q_idx;
                q_vector->reg_idx = q_idx;
                netif_napi_add_config_locked(adapter->netdev, &q_vector->napi,
                                             iavf_napi_poll, q_idx);
                netif_napi_set_irq_locked(&q_vector->napi, irq_num);
        }

        return 0;
}

/**
 * iavf_free_q_vectors - Free memory allocated for interrupt vectors
 * @adapter: board private structure to initialize
 *
 * This function frees the memory allocated to the q_vectors.  In addition if
 * NAPI is enabled it will delete any references to the NAPI struct prior
 * to freeing the q_vector.
 **/
static void iavf_free_q_vectors(struct iavf_adapter *adapter)
{
        int q_idx, num_q_vectors;

        if (!adapter->q_vectors)
                return;

        num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;

        for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
                struct iavf_q_vector *q_vector = &adapter->q_vectors[q_idx];

                netif_napi_del_locked(&q_vector->napi);
        }
        kfree(adapter->q_vectors);
        adapter->q_vectors = NULL;
}

/**
 * iavf_reset_interrupt_capability - Reset MSIX setup
 * @adapter: board private structure
 *
 **/
static void iavf_reset_interrupt_capability(struct iavf_adapter *adapter)
{
        if (!adapter->msix_entries)
                return;

        pci_disable_msix(adapter->pdev);
        kfree(adapter->msix_entries);
        adapter->msix_entries = NULL;
}

/**
 * iavf_init_interrupt_scheme - Determine if MSIX is supported and init
 * @adapter: board private structure to initialize
 *
 **/
static int iavf_init_interrupt_scheme(struct iavf_adapter *adapter)
{
        int err;

        err = iavf_alloc_queues(adapter);
        if (err) {
                dev_err(&adapter->pdev->dev,
                        "Unable to allocate memory for queues\n");
                goto err_alloc_queues;
        }

        err = iavf_set_interrupt_capability(adapter);
        if (err) {
                dev_err(&adapter->pdev->dev,
                        "Unable to setup interrupt capabilities\n");
                goto err_set_interrupt;
        }

        err = iavf_alloc_q_vectors(adapter);
        if (err) {
                dev_err(&adapter->pdev->dev,
                        "Unable to allocate memory for queue vectors\n");
                goto err_alloc_q_vectors;
        }

        /* If we've made it so far while ADq flag being ON, then we haven't
         * bailed out anywhere in middle. And ADq isn't just enabled but actual
         * resources have been allocated in the reset path.
         * Now we can truly claim that ADq is enabled.
         */
        if ((adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) &&
            adapter->num_tc)
                dev_info(&adapter->pdev->dev, "ADq Enabled, %u TCs created",
                         adapter->num_tc);

        dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
                 (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
                 adapter->num_active_queues);

        return 0;
err_alloc_q_vectors:
        iavf_reset_interrupt_capability(adapter);
err_set_interrupt:
        iavf_free_queues(adapter);
err_alloc_queues:
        return err;
}

/**
 * iavf_free_interrupt_scheme - Undo what iavf_init_interrupt_scheme does
 * @adapter: board private structure
 **/
static void iavf_free_interrupt_scheme(struct iavf_adapter *adapter)
{
        iavf_free_q_vectors(adapter);
        iavf_reset_interrupt_capability(adapter);
        iavf_free_queues(adapter);
}

/**
 * iavf_free_rss - Free memory used by RSS structs
 * @adapter: board private structure
 **/
static void iavf_free_rss(struct iavf_adapter *adapter)
{
        kfree(adapter->rss_key);
        adapter->rss_key = NULL;

        kfree(adapter->rss_lut);
        adapter->rss_lut = NULL;
}

/**
 * iavf_reinit_interrupt_scheme - Reallocate queues and vectors
 * @adapter: board private structure
 * @running: true if adapter->state == __IAVF_RUNNING
 *
 * Returns 0 on success, negative on failure
 **/
static int iavf_reinit_interrupt_scheme(struct iavf_adapter *adapter, bool running)
{
        struct net_device *netdev = adapter->netdev;
        int err;

        if (running)
                iavf_free_traffic_irqs(adapter);
        iavf_free_misc_irq(adapter);
        iavf_free_interrupt_scheme(adapter);

        err = iavf_init_interrupt_scheme(adapter);
        if (err)
                goto err;

        netif_tx_stop_all_queues(netdev);

        err = iavf_request_misc_irq(adapter);
        if (err)
                goto err;

        set_bit(__IAVF_VSI_DOWN, adapter->vsi.state);

        iavf_map_rings_to_vectors(adapter);
err:
        return err;
}

/**
 * iavf_finish_config - do all netdev work that needs RTNL
 * @work: our work_struct
 *
 * Do work that needs RTNL.
 */
static void iavf_finish_config(struct work_struct *work)
{
        struct iavf_adapter *adapter;
        bool netdev_released = false;
        int pairs, err;

        adapter = container_of(work, struct iavf_adapter, finish_config);

        /* Always take RTNL first to prevent circular lock dependency;
         * the dev->lock (== netdev lock) is needed to update the queue number.
         */
        rtnl_lock();
        netdev_lock(adapter->netdev);

        if ((adapter->flags & IAVF_FLAG_SETUP_NETDEV_FEATURES) &&
            adapter->netdev->reg_state == NETREG_REGISTERED &&
            !test_bit(__IAVF_IN_REMOVE_TASK, &adapter->crit_section)) {
                netdev_update_features(adapter->netdev);
                adapter->flags &= ~IAVF_FLAG_SETUP_NETDEV_FEATURES;
        }

        switch (adapter->state) {
        case __IAVF_DOWN:
                /* Set the real number of queues when reset occurs while
                 * state == __IAVF_DOWN
                 */
                pairs = adapter->num_active_queues;
                netif_set_real_num_rx_queues(adapter->netdev, pairs);
                netif_set_real_num_tx_queues(adapter->netdev, pairs);

                if (adapter->netdev->reg_state != NETREG_REGISTERED) {
                        netdev_unlock(adapter->netdev);
                        netdev_released = true;
                        err = register_netdevice(adapter->netdev);
                        if (err) {
                                dev_err(&adapter->pdev->dev, "Unable to register netdev (%d)\n",
                                        err);

                                /* go back and try again.*/
                                netdev_lock(adapter->netdev);
                                iavf_free_rss(adapter);
                                iavf_free_misc_irq(adapter);
                                iavf_reset_interrupt_capability(adapter);
                                iavf_change_state(adapter,
                                                  __IAVF_INIT_CONFIG_ADAPTER);
                                netdev_unlock(adapter->netdev);
                                goto out;
                        }
                }
                break;
        case __IAVF_RUNNING:
                pairs = adapter->num_active_queues;
                netif_set_real_num_rx_queues(adapter->netdev, pairs);
                netif_set_real_num_tx_queues(adapter->netdev, pairs);
                break;

        default:
                break;
        }

out:
        if (!netdev_released)
                netdev_unlock(adapter->netdev);
        rtnl_unlock();
}

/**
 * iavf_schedule_finish_config - Set the flags and schedule a reset event
 * @adapter: board private structure
 **/
void iavf_schedule_finish_config(struct iavf_adapter *adapter)
{
        if (!test_bit(__IAVF_IN_REMOVE_TASK, &adapter->crit_section))
                queue_work(adapter->wq, &adapter->finish_config);
}

/**
 * iavf_process_aq_command - process aq_required flags
 * and sends aq command
 * @adapter: pointer to iavf adapter structure
 *
 * Returns 0 on success
 * Returns error code if no command was sent
 * or error code if the command failed.
 **/
static int iavf_process_aq_command(struct iavf_adapter *adapter)
{
        if (adapter->aq_required & IAVF_FLAG_AQ_GET_CONFIG)
                return iavf_send_vf_config_msg(adapter);
        if (adapter->aq_required & IAVF_FLAG_AQ_GET_OFFLOAD_VLAN_V2_CAPS)
                return iavf_send_vf_offload_vlan_v2_msg(adapter);
        if (adapter->aq_required & IAVF_FLAG_AQ_GET_SUPPORTED_RXDIDS)
                return iavf_send_vf_supported_rxdids_msg(adapter);
        if (adapter->aq_required & IAVF_FLAG_AQ_GET_PTP_CAPS)
                return iavf_send_vf_ptp_caps_msg(adapter);
        if (adapter->aq_required & IAVF_FLAG_AQ_DISABLE_QUEUES) {
                iavf_disable_queues(adapter);
                return 0;
        }

        if (adapter->aq_required & IAVF_FLAG_AQ_MAP_VECTORS) {
                iavf_map_queues(adapter);
                return 0;
        }

        if (adapter->aq_required & IAVF_FLAG_AQ_ADD_MAC_FILTER) {
                iavf_add_ether_addrs(adapter);
                return 0;
        }

        if (adapter->aq_required & IAVF_FLAG_AQ_ADD_VLAN_FILTER) {
                iavf_add_vlans(adapter);
                return 0;
        }

        if (adapter->aq_required & IAVF_FLAG_AQ_DEL_MAC_FILTER) {
                iavf_del_ether_addrs(adapter);
                return 0;
        }

        if (adapter->aq_required & IAVF_FLAG_AQ_DEL_VLAN_FILTER) {
                iavf_del_vlans(adapter);
                return 0;
        }

        if (adapter->aq_required & IAVF_FLAG_AQ_ENABLE_VLAN_STRIPPING) {
                iavf_enable_vlan_stripping(adapter);
                return 0;
        }

        if (adapter->aq_required & IAVF_FLAG_AQ_DISABLE_VLAN_STRIPPING) {
                iavf_disable_vlan_stripping(adapter);
                return 0;
        }

        if (adapter->aq_required & IAVF_FLAG_AQ_CONFIGURE_QUEUES_BW) {
                iavf_cfg_queues_bw(adapter);
                return 0;
        }

        if (adapter->aq_required & IAVF_FLAG_AQ_GET_QOS_CAPS) {
                iavf_get_qos_caps(adapter);
                return 0;
        }

        if (adapter->aq_required & IAVF_FLAG_AQ_CFG_QUEUES_QUANTA_SIZE) {
                iavf_cfg_queues_quanta_size(adapter);
                return 0;
        }

        if (adapter->aq_required & IAVF_FLAG_AQ_CONFIGURE_QUEUES) {
                iavf_configure_queues(adapter);
                return 0;
        }

        if (adapter->aq_required & IAVF_FLAG_AQ_ENABLE_QUEUES) {
                iavf_enable_queues(adapter);
                return 0;
        }

        if (adapter->aq_required & IAVF_FLAG_AQ_CONFIGURE_RSS) {
                /* This message goes straight to the firmware, not the
                 * PF, so we don't have to set current_op as we will
                 * not get a response through the ARQ.
                 */
                adapter->aq_required &= ~IAVF_FLAG_AQ_CONFIGURE_RSS;
                return 0;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_GET_RSS_HASHCFG) {
                iavf_get_rss_hashcfg(adapter);
                return 0;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_SET_RSS_HASHCFG) {
                iavf_set_rss_hashcfg(adapter);
                return 0;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_SET_RSS_KEY) {
                iavf_set_rss_key(adapter);
                return 0;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_SET_RSS_LUT) {
                iavf_set_rss_lut(adapter);
                return 0;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_SET_RSS_HFUNC) {
                iavf_set_rss_hfunc(adapter);
                return 0;
        }

        if (adapter->aq_required & IAVF_FLAG_AQ_CONFIGURE_PROMISC_MODE) {
                iavf_set_promiscuous(adapter);
                return 0;
        }

        if (adapter->aq_required & IAVF_FLAG_AQ_ENABLE_CHANNELS) {
                iavf_enable_channels(adapter);
                return 0;
        }

        if (adapter->aq_required & IAVF_FLAG_AQ_DISABLE_CHANNELS) {
                iavf_disable_channels(adapter);
                return 0;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_ADD_CLOUD_FILTER) {
                iavf_add_cloud_filter(adapter);
                return 0;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_DEL_CLOUD_FILTER) {
                iavf_del_cloud_filter(adapter);
                return 0;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_ADD_FDIR_FILTER) {
                iavf_add_fdir_filter(adapter);
                return IAVF_SUCCESS;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_DEL_FDIR_FILTER) {
                iavf_del_fdir_filter(adapter);
                return IAVF_SUCCESS;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_ADD_ADV_RSS_CFG) {
                iavf_add_adv_rss_cfg(adapter);
                return 0;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_DEL_ADV_RSS_CFG) {
                iavf_del_adv_rss_cfg(adapter);
                return 0;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_DISABLE_CTAG_VLAN_STRIPPING) {
                iavf_disable_vlan_stripping_v2(adapter, ETH_P_8021Q);
                return 0;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_DISABLE_STAG_VLAN_STRIPPING) {
                iavf_disable_vlan_stripping_v2(adapter, ETH_P_8021AD);
                return 0;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_ENABLE_CTAG_VLAN_STRIPPING) {
                iavf_enable_vlan_stripping_v2(adapter, ETH_P_8021Q);
                return 0;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_ENABLE_STAG_VLAN_STRIPPING) {
                iavf_enable_vlan_stripping_v2(adapter, ETH_P_8021AD);
                return 0;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_DISABLE_CTAG_VLAN_INSERTION) {
                iavf_disable_vlan_insertion_v2(adapter, ETH_P_8021Q);
                return 0;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_DISABLE_STAG_VLAN_INSERTION) {
                iavf_disable_vlan_insertion_v2(adapter, ETH_P_8021AD);
                return 0;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_ENABLE_CTAG_VLAN_INSERTION) {
                iavf_enable_vlan_insertion_v2(adapter, ETH_P_8021Q);
                return 0;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_ENABLE_STAG_VLAN_INSERTION) {
                iavf_enable_vlan_insertion_v2(adapter, ETH_P_8021AD);
                return 0;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_SEND_PTP_CMD) {
                iavf_virtchnl_send_ptp_cmd(adapter);
                return IAVF_SUCCESS;
        }
        if (adapter->aq_required & IAVF_FLAG_AQ_REQUEST_STATS) {
                iavf_request_stats(adapter);
                return 0;
        }

        return -EAGAIN;
}

/**
 * iavf_set_vlan_offload_features - set VLAN offload configuration
 * @adapter: board private structure
 * @prev_features: previous features used for comparison
 * @features: updated features used for configuration
 *
 * Set the aq_required bit(s) based on the requested features passed in to
 * configure VLAN stripping and/or VLAN insertion if supported. Also, schedule
 * the watchdog if any changes are requested to expedite the request via
 * virtchnl.
 **/
static void
iavf_set_vlan_offload_features(struct iavf_adapter *adapter,
                               netdev_features_t prev_features,
                               netdev_features_t features)
{
        bool enable_stripping = true, enable_insertion = true;
        u16 vlan_ethertype = 0;
        u64 aq_required = 0;

        /* keep cases separate because one ethertype for offloads can be
         * disabled at the same time as another is disabled, so check for an
         * enabled ethertype first, then check for disabled. Default to
         * ETH_P_8021Q so an ethertype is specified if disabling insertion and
         * stripping.
         */
        if (features & (NETIF_F_HW_VLAN_STAG_RX | NETIF_F_HW_VLAN_STAG_TX))
                vlan_ethertype = ETH_P_8021AD;
        else if (features & (NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_TX))
                vlan_ethertype = ETH_P_8021Q;
        else if (prev_features & (NETIF_F_HW_VLAN_STAG_RX | NETIF_F_HW_VLAN_STAG_TX))
                vlan_ethertype = ETH_P_8021AD;
        else if (prev_features & (NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_TX))
                vlan_ethertype = ETH_P_8021Q;
        else
                vlan_ethertype = ETH_P_8021Q;

        if (!(features & (NETIF_F_HW_VLAN_STAG_RX | NETIF_F_HW_VLAN_CTAG_RX)))
                enable_stripping = false;
        if (!(features & (NETIF_F_HW_VLAN_STAG_TX | NETIF_F_HW_VLAN_CTAG_TX)))
                enable_insertion = false;

        if (VLAN_ALLOWED(adapter)) {
                /* VIRTCHNL_VF_OFFLOAD_VLAN only has support for toggling VLAN
                 * stripping via virtchnl. VLAN insertion can be toggled on the
                 * netdev, but it doesn't require a virtchnl message
                 */
                if (enable_stripping)
                        aq_required |= IAVF_FLAG_AQ_ENABLE_VLAN_STRIPPING;
                else
                        aq_required |= IAVF_FLAG_AQ_DISABLE_VLAN_STRIPPING;

        } else if (VLAN_V2_ALLOWED(adapter)) {
                switch (vlan_ethertype) {
                case ETH_P_8021Q:
                        if (enable_stripping)
                                aq_required |= IAVF_FLAG_AQ_ENABLE_CTAG_VLAN_STRIPPING;
                        else
                                aq_required |= IAVF_FLAG_AQ_DISABLE_CTAG_VLAN_STRIPPING;

                        if (enable_insertion)
                                aq_required |= IAVF_FLAG_AQ_ENABLE_CTAG_VLAN_INSERTION;
                        else
                                aq_required |= IAVF_FLAG_AQ_DISABLE_CTAG_VLAN_INSERTION;
                        break;
                case ETH_P_8021AD:
                        if (enable_stripping)
                                aq_required |= IAVF_FLAG_AQ_ENABLE_STAG_VLAN_STRIPPING;
                        else
                                aq_required |= IAVF_FLAG_AQ_DISABLE_STAG_VLAN_STRIPPING;

                        if (enable_insertion)
                                aq_required |= IAVF_FLAG_AQ_ENABLE_STAG_VLAN_INSERTION;
                        else
                                aq_required |= IAVF_FLAG_AQ_DISABLE_STAG_VLAN_INSERTION;
                        break;
                }
        }

        if (aq_required)
                iavf_schedule_aq_request(adapter, aq_required);
}

/**
 * iavf_startup - first step of driver startup
 * @adapter: board private structure
 *
 * Function process __IAVF_STARTUP driver state.
 * When success the state is changed to __IAVF_INIT_VERSION_CHECK
 * when fails the state is changed to __IAVF_INIT_FAILED
 **/
static void iavf_startup(struct iavf_adapter *adapter)
{
        struct pci_dev *pdev = adapter->pdev;
        struct iavf_hw *hw = &adapter->hw;
        enum iavf_status status;
        int ret;

        WARN_ON(adapter->state != __IAVF_STARTUP);

        /* driver loaded, probe complete */
        adapter->flags &= ~IAVF_FLAG_PF_COMMS_FAILED;
        adapter->flags &= ~IAVF_FLAG_RESET_PENDING;

        ret = iavf_check_reset_complete(hw);
        if (ret) {
                dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
                         ret);
                goto err;
        }
        hw->aq.num_arq_entries = IAVF_AQ_LEN;
        hw->aq.num_asq_entries = IAVF_AQ_LEN;
        hw->aq.arq_buf_size = IAVF_MAX_AQ_BUF_SIZE;
        hw->aq.asq_buf_size = IAVF_MAX_AQ_BUF_SIZE;

        status = iavf_init_adminq(hw);
        if (status) {
                dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
                        status);
                goto err;
        }
        ret = iavf_send_api_ver(adapter);
        if (ret) {
                dev_err(&pdev->dev, "Unable to send to PF (%d)\n", ret);
                iavf_shutdown_adminq(hw);
                goto err;
        }
        iavf_change_state(adapter, __IAVF_INIT_VERSION_CHECK);
        return;
err:
        iavf_change_state(adapter, __IAVF_INIT_FAILED);
}

/**
 * iavf_init_version_check - second step of driver startup
 * @adapter: board private structure
 *
 * Function process __IAVF_INIT_VERSION_CHECK driver state.
 * When success the state is changed to __IAVF_INIT_GET_RESOURCES
 * when fails the state is changed to __IAVF_INIT_FAILED
 **/
static void iavf_init_version_check(struct iavf_adapter *adapter)
{
        struct pci_dev *pdev = adapter->pdev;
        struct iavf_hw *hw = &adapter->hw;
        int err = -EAGAIN;

        WARN_ON(adapter->state != __IAVF_INIT_VERSION_CHECK);

        if (!iavf_asq_done(hw)) {
                dev_err(&pdev->dev, "Admin queue command never completed\n");
                iavf_shutdown_adminq(hw);
                iavf_change_state(adapter, __IAVF_STARTUP);
                goto err;
        }

        /* aq msg sent, awaiting reply */
        err = iavf_verify_api_ver(adapter);
        if (err) {
                if (err == -EALREADY)
                        err = iavf_send_api_ver(adapter);
                else
                        dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
                                adapter->pf_version.major,
                                adapter->pf_version.minor,
                                VIRTCHNL_VERSION_MAJOR,
                                VIRTCHNL_VERSION_MINOR);
                goto err;
        }
        err = iavf_send_vf_config_msg(adapter);
        if (err) {
                dev_err(&pdev->dev, "Unable to send config request (%d)\n",
                        err);
                goto err;
        }
        iavf_change_state(adapter, __IAVF_INIT_GET_RESOURCES);
        return;
err:
        iavf_change_state(adapter, __IAVF_INIT_FAILED);
}

/**
 * iavf_parse_vf_resource_msg - parse response from VIRTCHNL_OP_GET_VF_RESOURCES
 * @adapter: board private structure
 */
int iavf_parse_vf_resource_msg(struct iavf_adapter *adapter)
{
        int i, num_req_queues = adapter->num_req_queues;
        struct iavf_vsi *vsi = &adapter->vsi;

        for (i = 0; i < adapter->vf_res->num_vsis; i++) {
                if (adapter->vf_res->vsi_res[i].vsi_type == VIRTCHNL_VSI_SRIOV)
                        adapter->vsi_res = &adapter->vf_res->vsi_res[i];
        }
        if (!adapter->vsi_res) {
                dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
                return -ENODEV;
        }

        if (num_req_queues &&
            num_req_queues > adapter->vsi_res->num_queue_pairs) {
                /* Problem.  The PF gave us fewer queues than what we had
                 * negotiated in our request.  Need a reset to see if we can't
                 * get back to a working state.
                 */
                dev_err(&adapter->pdev->dev,
                        "Requested %d queues, but PF only gave us %d.\n",
                        num_req_queues,
                        adapter->vsi_res->num_queue_pairs);
                adapter->flags |= IAVF_FLAG_REINIT_MSIX_NEEDED;
                adapter->num_req_queues = adapter->vsi_res->num_queue_pairs;
                iavf_schedule_reset(adapter, IAVF_FLAG_RESET_NEEDED);

                return -EAGAIN;
        }
        adapter->num_req_queues = 0;
        adapter->vsi.id = adapter->vsi_res->vsi_id;

        adapter->vsi.back = adapter;
        adapter->vsi.base_vector = 1;
        vsi->netdev = adapter->netdev;
        vsi->qs_handle = adapter->vsi_res->qset_handle;
        if (adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_RSS_PF) {
                adapter->rss_key_size = adapter->vf_res->rss_key_size;
                adapter->rss_lut_size = adapter->vf_res->rss_lut_size;
        } else {
                adapter->rss_key_size = IAVF_HKEY_ARRAY_SIZE;
                adapter->rss_lut_size = IAVF_HLUT_ARRAY_SIZE;
        }

        return 0;
}

/**
 * iavf_init_get_resources - third step of driver startup
 * @adapter: board private structure
 *
 * Function process __IAVF_INIT_GET_RESOURCES driver state and
 * finishes driver initialization procedure.
 * When success the state is changed to __IAVF_DOWN
 * when fails the state is changed to __IAVF_INIT_FAILED
 **/
static void iavf_init_get_resources(struct iavf_adapter *adapter)
{
        struct pci_dev *pdev = adapter->pdev;
        struct iavf_hw *hw = &adapter->hw;
        int err;

        WARN_ON(adapter->state != __IAVF_INIT_GET_RESOURCES);
        /* aq msg sent, awaiting reply */
        if (!adapter->vf_res) {
                adapter->vf_res = kzalloc(IAVF_VIRTCHNL_VF_RESOURCE_SIZE,
                                          GFP_KERNEL);
                if (!adapter->vf_res) {
                        err = -ENOMEM;
                        goto err;
                }
        }
        err = iavf_get_vf_config(adapter);
        if (err == -EALREADY) {
                err = iavf_send_vf_config_msg(adapter);
                goto err;
        } else if (err == -EINVAL) {
                /* We only get -EINVAL if the device is in a very bad
                 * state or if we've been disabled for previous bad
                 * behavior. Either way, we're done now.
                 */
                iavf_shutdown_adminq(hw);
                dev_err(&pdev->dev, "Unable to get VF config due to PF error condition, not retrying\n");
                return;
        }
        if (err) {
                dev_err(&pdev->dev, "Unable to get VF config (%d)\n", err);
                goto err_alloc;
        }

        err = iavf_parse_vf_resource_msg(adapter);
        if (err) {
                dev_err(&pdev->dev, "Failed to parse VF resource message from PF (%d)\n",
                        err);
                goto err_alloc;
        }
        /* Some features require additional messages to negotiate extended
         * capabilities. These are processed in sequence by the
         * __IAVF_INIT_EXTENDED_CAPS driver state.
         */
        adapter->extended_caps = IAVF_EXTENDED_CAPS;

        iavf_change_state(adapter, __IAVF_INIT_EXTENDED_CAPS);
        return;

err_alloc:
        kfree(adapter->vf_res);
        adapter->vf_res = NULL;
err:
        iavf_change_state(adapter, __IAVF_INIT_FAILED);
}

/**
 * iavf_init_send_offload_vlan_v2_caps - part of initializing VLAN V2 caps
 * @adapter: board private structure
 *
 * Function processes send of the extended VLAN V2 capability message to the
 * PF. Must clear IAVF_EXTENDED_CAP_RECV_VLAN_V2 if the message is not sent,
 * e.g. due to PF not negotiating VIRTCHNL_VF_OFFLOAD_VLAN_V2.
 */
static void iavf_init_send_offload_vlan_v2_caps(struct iavf_adapter *adapter)
{
        int ret;

        WARN_ON(!(adapter->extended_caps & IAVF_EXTENDED_CAP_SEND_VLAN_V2));

        ret = iavf_send_vf_offload_vlan_v2_msg(adapter);
        if (ret && ret == -EOPNOTSUPP) {
                /* PF does not support VIRTCHNL_VF_OFFLOAD_V2. In this case,
                 * we did not send the capability exchange message and do not
                 * expect a response.
                 */
                adapter->extended_caps &= ~IAVF_EXTENDED_CAP_RECV_VLAN_V2;
        }

        /* We sent the message, so move on to the next step */
        adapter->extended_caps &= ~IAVF_EXTENDED_CAP_SEND_VLAN_V2;
}

/**
 * iavf_init_recv_offload_vlan_v2_caps - part of initializing VLAN V2 caps
 * @adapter: board private structure
 *
 * Function processes receipt of the extended VLAN V2 capability message from
 * the PF.
 **/
static void iavf_init_recv_offload_vlan_v2_caps(struct iavf_adapter *adapter)
{
        int ret;

        WARN_ON(!(adapter->extended_caps & IAVF_EXTENDED_CAP_RECV_VLAN_V2));

        memset(&adapter->vlan_v2_caps, 0, sizeof(adapter->vlan_v2_caps));

        ret = iavf_get_vf_vlan_v2_caps(adapter);
        if (ret)
                goto err;

        /* We've processed receipt of the VLAN V2 caps message */
        adapter->extended_caps &= ~IAVF_EXTENDED_CAP_RECV_VLAN_V2;
        return;
err:
        /* We didn't receive a reply. Make sure we try sending again when
         * __IAVF_INIT_FAILED attempts to recover.
         */
        adapter->extended_caps |= IAVF_EXTENDED_CAP_SEND_VLAN_V2;
        iavf_change_state(adapter, __IAVF_INIT_FAILED);
}

/**
 * iavf_init_send_supported_rxdids - part of querying for supported RXDID
 * formats
 * @adapter: board private structure
 *
 * Function processes send of the request for supported RXDIDs to the PF.
 * Must clear IAVF_EXTENDED_CAP_RECV_RXDID if the message is not sent, e.g.
 * due to the PF not negotiating VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC.
 */
static void iavf_init_send_supported_rxdids(struct iavf_adapter *adapter)
{
        int ret;

        ret = iavf_send_vf_supported_rxdids_msg(adapter);
        if (ret == -EOPNOTSUPP) {
                /* PF does not support VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC. In this
                 * case, we did not send the capability exchange message and
                 * do not expect a response.
                 */
                adapter->extended_caps &= ~IAVF_EXTENDED_CAP_RECV_RXDID;
        }

        /* We sent the message, so move on to the next step */
        adapter->extended_caps &= ~IAVF_EXTENDED_CAP_SEND_RXDID;
}

/**
 * iavf_init_recv_supported_rxdids - part of querying for supported RXDID
 * formats
 * @adapter: board private structure
 *
 * Function processes receipt of the supported RXDIDs message from the PF.
 **/
static void iavf_init_recv_supported_rxdids(struct iavf_adapter *adapter)
{
        int ret;

        memset(&adapter->supp_rxdids, 0, sizeof(adapter->supp_rxdids));

        ret = iavf_get_vf_supported_rxdids(adapter);
        if (ret)
                goto err;

        /* We've processed the PF response to the
         * VIRTCHNL_OP_GET_SUPPORTED_RXDIDS message we sent previously.
         */
        adapter->extended_caps &= ~IAVF_EXTENDED_CAP_RECV_RXDID;
        return;

err:
        /* We didn't receive a reply. Make sure we try sending again when
         * __IAVF_INIT_FAILED attempts to recover.
         */
        adapter->extended_caps |= IAVF_EXTENDED_CAP_SEND_RXDID;
        iavf_change_state(adapter, __IAVF_INIT_FAILED);
}

/**
 * iavf_init_send_ptp_caps - part of querying for extended PTP capabilities
 * @adapter: board private structure
 *
 * Function processes send of the request for 1588 PTP capabilities to the PF.
 * Must clear IAVF_EXTENDED_CAP_SEND_PTP if the message is not sent, e.g.
 * due to the PF not negotiating VIRTCHNL_VF_PTP_CAP
 */
static void iavf_init_send_ptp_caps(struct iavf_adapter *adapter)
{
        if (iavf_send_vf_ptp_caps_msg(adapter) == -EOPNOTSUPP) {
                /* PF does not support VIRTCHNL_VF_PTP_CAP. In this case, we
                 * did not send the capability exchange message and do not
                 * expect a response.
                 */
                adapter->extended_caps &= ~IAVF_EXTENDED_CAP_RECV_PTP;
        }

        /* We sent the message, so move on to the next step */
        adapter->extended_caps &= ~IAVF_EXTENDED_CAP_SEND_PTP;
}

/**
 * iavf_init_recv_ptp_caps - part of querying for supported PTP capabilities
 * @adapter: board private structure
 *
 * Function processes receipt of the PTP capabilities supported on this VF.
 **/
static void iavf_init_recv_ptp_caps(struct iavf_adapter *adapter)
{
        memset(&adapter->ptp.hw_caps, 0, sizeof(adapter->ptp.hw_caps));

        if (iavf_get_vf_ptp_caps(adapter))
                goto err;

        /* We've processed the PF response to the VIRTCHNL_OP_1588_PTP_GET_CAPS
         * message we sent previously.
         */
        adapter->extended_caps &= ~IAVF_EXTENDED_CAP_RECV_PTP;
        return;

err:
        /* We didn't receive a reply. Make sure we try sending again when
         * __IAVF_INIT_FAILED attempts to recover.
         */
        adapter->extended_caps |= IAVF_EXTENDED_CAP_SEND_PTP;
        iavf_change_state(adapter, __IAVF_INIT_FAILED);
}

/**
 * iavf_init_process_extended_caps - Part of driver startup
 * @adapter: board private structure
 *
 * Function processes __IAVF_INIT_EXTENDED_CAPS driver state. This state
 * handles negotiating capabilities for features which require an additional
 * message.
 *
 * Once all extended capabilities exchanges are finished, the driver will
 * transition into __IAVF_INIT_CONFIG_ADAPTER.
 */
static void iavf_init_process_extended_caps(struct iavf_adapter *adapter)
{
        WARN_ON(adapter->state != __IAVF_INIT_EXTENDED_CAPS);

        /* Process capability exchange for VLAN V2 */
        if (adapter->extended_caps & IAVF_EXTENDED_CAP_SEND_VLAN_V2) {
                iavf_init_send_offload_vlan_v2_caps(adapter);
                return;
        } else if (adapter->extended_caps & IAVF_EXTENDED_CAP_RECV_VLAN_V2) {
                iavf_init_recv_offload_vlan_v2_caps(adapter);
                return;
        }

        /* Process capability exchange for RXDID formats */
        if (adapter->extended_caps & IAVF_EXTENDED_CAP_SEND_RXDID) {
                iavf_init_send_supported_rxdids(adapter);
                return;
        } else if (adapter->extended_caps & IAVF_EXTENDED_CAP_RECV_RXDID) {
                iavf_init_recv_supported_rxdids(adapter);
                return;
        }

        /* Process capability exchange for PTP features */
        if (adapter->extended_caps & IAVF_EXTENDED_CAP_SEND_PTP) {
                iavf_init_send_ptp_caps(adapter);
                return;
        } else if (adapter->extended_caps & IAVF_EXTENDED_CAP_RECV_PTP) {
                iavf_init_recv_ptp_caps(adapter);
                return;
        }

        /* When we reach here, no further extended capabilities exchanges are
         * necessary, so we finally transition into __IAVF_INIT_CONFIG_ADAPTER
         */
        iavf_change_state(adapter, __IAVF_INIT_CONFIG_ADAPTER);
}

/**
 * iavf_init_config_adapter - last part of driver startup
 * @adapter: board private structure
 *
 * After all the supported capabilities are negotiated, then the
 * __IAVF_INIT_CONFIG_ADAPTER state will finish driver initialization.
 */
static void iavf_init_config_adapter(struct iavf_adapter *adapter)
{
        struct net_device *netdev = adapter->netdev;
        struct pci_dev *pdev = adapter->pdev;
        int err;

        WARN_ON(adapter->state != __IAVF_INIT_CONFIG_ADAPTER);

        if (iavf_process_config(adapter))
                goto err;

        adapter->current_op = VIRTCHNL_OP_UNKNOWN;

        adapter->flags |= IAVF_FLAG_RX_CSUM_ENABLED;

        netdev->netdev_ops = &iavf_netdev_ops;
        iavf_set_ethtool_ops(netdev);
        netdev->watchdog_timeo = 5 * HZ;

        netdev->min_mtu = ETH_MIN_MTU;

        /* PF/VF API: vf_res->max_mtu is max frame size (not MTU).
         * Convert to MTU.
         */
        if (!adapter->vf_res->max_mtu) {
                netdev->max_mtu = LIBIE_MAX_MTU;
        } else if (adapter->vf_res->max_mtu < LIBETH_RX_LL_LEN + ETH_MIN_MTU ||
                   adapter->vf_res->max_mtu >
                           LIBETH_RX_LL_LEN + LIBIE_MAX_MTU) {
                netdev_warn_once(adapter->netdev,
                                 "invalid max frame size %d from PF, using default MTU %d",
                                 adapter->vf_res->max_mtu, LIBIE_MAX_MTU);
                netdev->max_mtu = LIBIE_MAX_MTU;
        } else {
                netdev->max_mtu = adapter->vf_res->max_mtu - LIBETH_RX_LL_LEN;
        }

        if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
                dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
                         adapter->hw.mac.addr);
                eth_hw_addr_random(netdev);
                ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
        } else {
                eth_hw_addr_set(netdev, adapter->hw.mac.addr);
                ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
        }

        adapter->tx_desc_count = IAVF_DEFAULT_TXD;
        adapter->rx_desc_count = IAVF_DEFAULT_RXD;
        err = iavf_init_interrupt_scheme(adapter);
        if (err)
                goto err_sw_init;
        iavf_map_rings_to_vectors(adapter);
        if (adapter->vf_res->vf_cap_flags &
                VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
                adapter->flags |= IAVF_FLAG_WB_ON_ITR_CAPABLE;

        err = iavf_request_misc_irq(adapter);
        if (err)
                goto err_sw_init;

        netif_carrier_off(netdev);
        adapter->link_up = false;
        netif_tx_stop_all_queues(netdev);

        dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
        if (netdev->features & NETIF_F_GRO)
                dev_info(&pdev->dev, "GRO is enabled\n");

        iavf_change_state(adapter, __IAVF_DOWN);
        set_bit(__IAVF_VSI_DOWN, adapter->vsi.state);

        iavf_misc_irq_enable(adapter);
        wake_up(&adapter->down_waitqueue);

        adapter->rss_key = kzalloc(adapter->rss_key_size, GFP_KERNEL);
        adapter->rss_lut = kzalloc(adapter->rss_lut_size, GFP_KERNEL);
        if (!adapter->rss_key || !adapter->rss_lut) {
                err = -ENOMEM;
                goto err_mem;
        }
        if (RSS_AQ(adapter))
                adapter->aq_required |= IAVF_FLAG_AQ_CONFIGURE_RSS;
        else
                iavf_init_rss(adapter);

        if (VLAN_V2_ALLOWED(adapter))
                /* request initial VLAN offload settings */
                iavf_set_vlan_offload_features(adapter, 0, netdev->features);

        if (QOS_ALLOWED(adapter))
                adapter->aq_required |= IAVF_FLAG_AQ_GET_QOS_CAPS;

        /* Setup initial PTP configuration */
        iavf_ptp_init(adapter);

        iavf_schedule_finish_config(adapter);
        return;

err_mem:
        iavf_free_rss(adapter);
        iavf_free_misc_irq(adapter);
err_sw_init:
        iavf_reset_interrupt_capability(adapter);
err:
        iavf_change_state(adapter, __IAVF_INIT_FAILED);
}

static const int IAVF_NO_RESCHED = -1;

/* return: msec delay for requeueing itself */
static int iavf_watchdog_step(struct iavf_adapter *adapter)
{
        struct iavf_hw *hw = &adapter->hw;
        u32 reg_val;

        netdev_assert_locked(adapter->netdev);

        if (adapter->flags & IAVF_FLAG_PF_COMMS_FAILED)
                iavf_change_state(adapter, __IAVF_COMM_FAILED);

        switch (adapter->state) {
        case __IAVF_STARTUP:
                iavf_startup(adapter);
                return 30;
        case __IAVF_INIT_VERSION_CHECK:
                iavf_init_version_check(adapter);
                return 30;
        case __IAVF_INIT_GET_RESOURCES:
                iavf_init_get_resources(adapter);
                return 1;
        case __IAVF_INIT_EXTENDED_CAPS:
                iavf_init_process_extended_caps(adapter);
                return 1;
        case __IAVF_INIT_CONFIG_ADAPTER:
                iavf_init_config_adapter(adapter);
                return 1;
        case __IAVF_INIT_FAILED:
                if (test_bit(__IAVF_IN_REMOVE_TASK,
                             &adapter->crit_section)) {
                        /* Do not update the state and do not reschedule
                         * watchdog task, iavf_remove should handle this state
                         * as it can loop forever
                         */
                        return IAVF_NO_RESCHED;
                }
                if (++adapter->aq_wait_count > IAVF_AQ_MAX_ERR) {
                        dev_err(&adapter->pdev->dev,
                                "Failed to communicate with PF; waiting before retry\n");
                        adapter->flags |= IAVF_FLAG_PF_COMMS_FAILED;
                        iavf_shutdown_adminq(hw);
                        return 5000;
                }
                /* Try again from failed step*/
                iavf_change_state(adapter, adapter->last_state);
                return 1000;
        case __IAVF_COMM_FAILED:
                if (test_bit(__IAVF_IN_REMOVE_TASK,
                             &adapter->crit_section)) {
                        /* Set state to __IAVF_INIT_FAILED and perform remove
                         * steps. Remove IAVF_FLAG_PF_COMMS_FAILED so the task
                         * doesn't bring the state back to __IAVF_COMM_FAILED.
                         */
                        iavf_change_state(adapter, __IAVF_INIT_FAILED);
                        adapter->flags &= ~IAVF_FLAG_PF_COMMS_FAILED;
                        return IAVF_NO_RESCHED;
                }
                reg_val = rd32(hw, IAVF_VFGEN_RSTAT) &
                          IAVF_VFGEN_RSTAT_VFR_STATE_MASK;
                if (reg_val == VIRTCHNL_VFR_VFACTIVE ||
                    reg_val == VIRTCHNL_VFR_COMPLETED) {
                        /* A chance for redemption! */
                        dev_err(&adapter->pdev->dev,
                                "Hardware came out of reset. Attempting reinit.\n");
                        /* When init task contacts the PF and
                         * gets everything set up again, it'll restart the
                         * watchdog for us. Down, boy. Sit. Stay. Woof.
                         */
                        iavf_change_state(adapter, __IAVF_STARTUP);
                        adapter->flags &= ~IAVF_FLAG_PF_COMMS_FAILED;
                }
                adapter->aq_required = 0;
                adapter->current_op = VIRTCHNL_OP_UNKNOWN;
                return 10;
        case __IAVF_RESETTING:
                return 2000;
        case __IAVF_DOWN:
        case __IAVF_DOWN_PENDING:
        case __IAVF_TESTING:
        case __IAVF_RUNNING:
                if (adapter->current_op) {
                        if (!iavf_asq_done(hw)) {
                                dev_dbg(&adapter->pdev->dev,
                                        "Admin queue timeout\n");
                                iavf_send_api_ver(adapter);
                        }
                } else {
                        int ret = iavf_process_aq_command(adapter);

                        /* An error will be returned if no commands were
                         * processed; use this opportunity to update stats
                         * if the error isn't -ENOTSUPP
                         */
                        if (ret && ret != -EOPNOTSUPP &&
                            adapter->state == __IAVF_RUNNING)
                                iavf_request_stats(adapter);
                }
                if (adapter->state == __IAVF_RUNNING)
                        iavf_detect_recover_hung(&adapter->vsi);
                break;
        case __IAVF_REMOVE:
        default:
                return IAVF_NO_RESCHED;
        }

        /* check for hw reset */
        reg_val = rd32(hw, IAVF_VF_ARQLEN1) & IAVF_VF_ARQLEN1_ARQENABLE_MASK;
        if (!reg_val) {
                adapter->aq_required = 0;
                adapter->current_op = VIRTCHNL_OP_UNKNOWN;
                dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
                iavf_schedule_reset(adapter, IAVF_FLAG_RESET_PENDING);
        }

        return adapter->aq_required ? 20 : 2000;
}

static void iavf_watchdog_task(struct work_struct *work)
{
        struct iavf_adapter *adapter = container_of(work,
                                                    struct iavf_adapter,
                                                    watchdog_task.work);
        struct net_device *netdev = adapter->netdev;
        int msec_delay;

        netdev_lock(netdev);
        msec_delay = iavf_watchdog_step(adapter);
        /* note that we schedule a different task */
        if (adapter->state >= __IAVF_DOWN)
                queue_work(adapter->wq, &adapter->adminq_task);

        if (msec_delay != IAVF_NO_RESCHED)
                queue_delayed_work(adapter->wq, &adapter->watchdog_task,
                                   msecs_to_jiffies(msec_delay));
        netdev_unlock(netdev);
}

/**
 * iavf_disable_vf - disable VF
 * @adapter: board private structure
 *
 * Set communication failed flag and free all resources.
 */
static void iavf_disable_vf(struct iavf_adapter *adapter)
{
        struct iavf_mac_filter *f, *ftmp;
        struct iavf_vlan_filter *fv, *fvtmp;
        struct iavf_cloud_filter *cf, *cftmp;

        netdev_assert_locked(adapter->netdev);

        adapter->flags |= IAVF_FLAG_PF_COMMS_FAILED;

        iavf_ptp_release(adapter);

        /* We don't use netif_running() because it may be true prior to
         * ndo_open() returning, so we can't assume it means all our open
         * tasks have finished, since we're not holding the rtnl_lock here.
         */
        if (adapter->state == __IAVF_RUNNING) {
                set_bit(__IAVF_VSI_DOWN, adapter->vsi.state);
                netif_carrier_off(adapter->netdev);
                netif_tx_disable(adapter->netdev);
                adapter->link_up = false;
                iavf_napi_disable_all(adapter);
                iavf_irq_disable(adapter);
                iavf_free_traffic_irqs(adapter);
                iavf_free_all_tx_resources(adapter);
                iavf_free_all_rx_resources(adapter);
        }

        spin_lock_bh(&adapter->mac_vlan_list_lock);

        /* Delete all of the filters */
        list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
                list_del(&f->list);
                kfree(f);
        }

        list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list, list) {
                list_del(&fv->list);
                kfree(fv);
        }
        adapter->num_vlan_filters = 0;

        spin_unlock_bh(&adapter->mac_vlan_list_lock);

        spin_lock_bh(&adapter->cloud_filter_list_lock);
        list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list, list) {
                list_del(&cf->list);
                kfree(cf);
                adapter->num_cloud_filters--;
        }
        spin_unlock_bh(&adapter->cloud_filter_list_lock);

        iavf_free_misc_irq(adapter);
        iavf_free_interrupt_scheme(adapter);
        memset(adapter->vf_res, 0, IAVF_VIRTCHNL_VF_RESOURCE_SIZE);
        iavf_shutdown_adminq(&adapter->hw);
        adapter->flags &= ~IAVF_FLAG_RESET_PENDING;
        iavf_change_state(adapter, __IAVF_DOWN);
        wake_up(&adapter->down_waitqueue);
        dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
}

/**
 * iavf_reconfig_qs_bw - Call-back task to handle hardware reset
 * @adapter: board private structure
 *
 * After a reset, the shaper parameters of queues need to be replayed again.
 * Since the net_shaper object inside TX rings persists across reset,
 * set the update flag for all queues so that the virtchnl message is triggered
 * for all queues.
 **/
static void iavf_reconfig_qs_bw(struct iavf_adapter *adapter)
{
        int i, num = 0;

        for (i = 0; i < adapter->num_active_queues; i++)
                if (adapter->tx_rings[i].q_shaper.bw_min ||
                    adapter->tx_rings[i].q_shaper.bw_max) {
                        adapter->tx_rings[i].q_shaper_update = true;
                        num++;
                }

        if (num)
                adapter->aq_required |= IAVF_FLAG_AQ_CONFIGURE_QUEUES_BW;
}

/**
 * iavf_reset_step - Perform the VF reset sequence
 * @adapter: board private structure
 *
 * Requests a reset from PF, polls for completion, and reconfigures
 * the driver. Caller must hold the netdev instance lock.
 *
 * This can sleep for several seconds while polling HW registers.
 */
void iavf_reset_step(struct iavf_adapter *adapter)
{
        struct virtchnl_vf_resource *vfres = adapter->vf_res;
        struct net_device *netdev = adapter->netdev;
        struct iavf_hw *hw = &adapter->hw;
        struct iavf_mac_filter *f, *ftmp;
        struct iavf_cloud_filter *cf;
        enum iavf_status status;
        u32 reg_val;
        int i = 0, err;
        bool running;

        netdev_assert_locked(netdev);

        iavf_misc_irq_disable(adapter);
        if (adapter->flags & IAVF_FLAG_RESET_NEEDED) {
                adapter->flags &= ~IAVF_FLAG_RESET_NEEDED;
                /* Restart the AQ here. If we have been reset but didn't
                 * detect it, or if the PF had to reinit, our AQ will be hosed.
                 */
                iavf_shutdown_adminq(hw);
                iavf_init_adminq(hw);
                iavf_request_reset(adapter);
        }
        adapter->flags |= IAVF_FLAG_RESET_PENDING;

        /* poll until we see the reset actually happen */
        for (i = 0; i < IAVF_RESET_WAIT_DETECTED_COUNT; i++) {
                reg_val = rd32(hw, IAVF_VF_ARQLEN1) &
                          IAVF_VF_ARQLEN1_ARQENABLE_MASK;
                if (!reg_val)
                        break;
                usleep_range(5000, 10000);
        }
        if (i == IAVF_RESET_WAIT_DETECTED_COUNT) {
                dev_info(&adapter->pdev->dev, "Never saw reset\n");
                goto continue_reset; /* act like the reset happened */
        }

        /* wait until the reset is complete and the PF is responding to us */
        for (i = 0; i < IAVF_RESET_WAIT_COMPLETE_COUNT; i++) {
                /* sleep first to make sure a minimum wait time is met */
                msleep(IAVF_RESET_WAIT_MS);

                reg_val = rd32(hw, IAVF_VFGEN_RSTAT) &
                          IAVF_VFGEN_RSTAT_VFR_STATE_MASK;
                if (reg_val == VIRTCHNL_VFR_VFACTIVE)
                        break;
        }

        pci_set_master(adapter->pdev);
        pci_restore_msi_state(adapter->pdev);

        if (i == IAVF_RESET_WAIT_COMPLETE_COUNT) {
                dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
                        reg_val);
                iavf_disable_vf(adapter);
                return; /* Do not attempt to reinit. It's dead, Jim. */
        }

continue_reset:
        /* If we are still early in the state machine, just restart. */
        if (adapter->state <= __IAVF_INIT_FAILED) {
                iavf_shutdown_adminq(hw);
                iavf_change_state(adapter, __IAVF_STARTUP);
                iavf_startup(adapter);
                queue_delayed_work(adapter->wq, &adapter->watchdog_task,
                                   msecs_to_jiffies(30));
                return;
        }

        /* We don't use netif_running() because it may be true prior to
         * ndo_open() returning, so we can't assume it means all our open
         * tasks have finished, since we're not holding the rtnl_lock here.
         */
        running = adapter->state == __IAVF_RUNNING;

        if (running) {
                netif_carrier_off(netdev);
                netif_tx_stop_all_queues(netdev);
                adapter->link_up = false;
                iavf_napi_disable_all(adapter);
        }
        iavf_irq_disable(adapter);

        iavf_change_state(adapter, __IAVF_RESETTING);
        adapter->flags &= ~IAVF_FLAG_RESET_PENDING;

        iavf_ptp_release(adapter);

        /* free the Tx/Rx rings and descriptors, might be better to just
         * re-use them sometime in the future
         */
        iavf_free_all_rx_resources(adapter);
        iavf_free_all_tx_resources(adapter);

        adapter->flags |= IAVF_FLAG_QUEUES_DISABLED;
        /* kill and reinit the admin queue */
        iavf_shutdown_adminq(hw);
        adapter->current_op = VIRTCHNL_OP_UNKNOWN;
        status = iavf_init_adminq(hw);
        if (status) {
                dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
                         status);
                goto reset_err;
        }
        adapter->aq_required = 0;

        if ((adapter->flags & IAVF_FLAG_REINIT_MSIX_NEEDED) ||
            (adapter->flags & IAVF_FLAG_REINIT_ITR_NEEDED)) {
                err = iavf_reinit_interrupt_scheme(adapter, running);
                if (err)
                        goto reset_err;
        }

        if (RSS_AQ(adapter)) {
                adapter->aq_required |= IAVF_FLAG_AQ_CONFIGURE_RSS;
        } else {
                err = iavf_init_rss(adapter);
                if (err)
                        goto reset_err;
        }

        adapter->aq_required |= IAVF_FLAG_AQ_GET_CONFIG;
        adapter->aq_required |= IAVF_FLAG_AQ_MAP_VECTORS;

        /* Certain capabilities require an extended negotiation process using
         * extra messages that must be processed after getting the VF
         * configuration. The related checks such as VLAN_V2_ALLOWED() are not
         * reliable here, since the configuration has not yet been negotiated.
         *
         * Always set these flags, since them related VIRTCHNL messages won't
         * be sent until after VIRTCHNL_OP_GET_VF_RESOURCES.
         */
        adapter->aq_required |= IAVF_FLAG_AQ_EXTENDED_CAPS;

        spin_lock_bh(&adapter->mac_vlan_list_lock);

        /* Delete filter for the current MAC address, it could have
         * been changed by the PF via administratively set MAC.
         * Will be re-added via VIRTCHNL_OP_GET_VF_RESOURCES.
         */
        list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
                if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr)) {
                        list_del(&f->list);
                        kfree(f);
                }
        }
        /* re-add all MAC filters */
        list_for_each_entry(f, &adapter->mac_filter_list, list) {
                f->add = true;
        }
        spin_unlock_bh(&adapter->mac_vlan_list_lock);

        /* check if TCs are running and re-add all cloud filters */
        spin_lock_bh(&adapter->cloud_filter_list_lock);
        if ((vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) &&
            adapter->num_tc) {
                list_for_each_entry(cf, &adapter->cloud_filter_list, list) {
                        cf->add = true;
                }
        }
        spin_unlock_bh(&adapter->cloud_filter_list_lock);

        adapter->aq_required |= IAVF_FLAG_AQ_ADD_MAC_FILTER;
        adapter->aq_required |= IAVF_FLAG_AQ_ADD_CLOUD_FILTER;
        iavf_misc_irq_enable(adapter);

        mod_delayed_work(adapter->wq, &adapter->watchdog_task, 2);

        /* We were running when the reset started, so we need to restore some
         * state here.
         */
        if (running) {
                /* allocate transmit descriptors */
                err = iavf_setup_all_tx_resources(adapter);
                if (err)
                        goto reset_err;

                /* allocate receive descriptors */
                err = iavf_setup_all_rx_resources(adapter);
                if (err)
                        goto reset_err;

                if ((adapter->flags & IAVF_FLAG_REINIT_MSIX_NEEDED) ||
                    (adapter->flags & IAVF_FLAG_REINIT_ITR_NEEDED)) {
                        err = iavf_request_traffic_irqs(adapter, netdev->name);
                        if (err)
                                goto reset_err;

                        adapter->flags &= ~IAVF_FLAG_REINIT_MSIX_NEEDED;
                }

                iavf_configure(adapter);

                /* iavf_up_complete() will switch device back
                 * to __IAVF_RUNNING
                 */
                iavf_up_complete(adapter);

                iavf_irq_enable(adapter, true);

                iavf_reconfig_qs_bw(adapter);
        } else {
                iavf_change_state(adapter, __IAVF_DOWN);
                wake_up(&adapter->down_waitqueue);
        }

        adapter->flags &= ~IAVF_FLAG_REINIT_ITR_NEEDED;

        return;
reset_err:
        if (running) {
                set_bit(__IAVF_VSI_DOWN, adapter->vsi.state);
                iavf_free_traffic_irqs(adapter);
        }
        iavf_disable_vf(adapter);

        dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
}

static void iavf_reset_task(struct work_struct *work)
{
        struct iavf_adapter *adapter = container_of(work,
                                                      struct iavf_adapter,
                                                      reset_task);
        struct net_device *netdev = adapter->netdev;

        netdev_lock(netdev);
        iavf_reset_step(adapter);
        netdev_unlock(netdev);
}

/**
 * iavf_adminq_task - worker thread to clean the admin queue
 * @work: pointer to work_struct containing our data
 **/
static void iavf_adminq_task(struct work_struct *work)
{
        struct iavf_adapter *adapter =
                container_of(work, struct iavf_adapter, adminq_task);
        struct net_device *netdev = adapter->netdev;
        struct iavf_hw *hw = &adapter->hw;
        struct iavf_arq_event_info event;
        enum virtchnl_ops v_op;
        enum iavf_status ret, v_ret;
        u32 val, oldval;
        u16 pending;

        netdev_lock(netdev);

        if (adapter->flags & IAVF_FLAG_PF_COMMS_FAILED)
                goto unlock;

        event.buf_len = IAVF_MAX_AQ_BUF_SIZE;
        event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
        if (!event.msg_buf)
                goto unlock;

        do {
                ret = iavf_clean_arq_element(hw, &event, &pending);
                v_op = (enum virtchnl_ops)le32_to_cpu(event.desc.cookie_high);
                v_ret = (enum iavf_status)le32_to_cpu(event.desc.cookie_low);

                if (ret || !v_op)
                        break; /* No event to process or error cleaning ARQ */

                iavf_virtchnl_completion(adapter, v_op, v_ret, event.msg_buf,
                                         event.msg_len);
                if (pending != 0)
                        memset(event.msg_buf, 0, IAVF_MAX_AQ_BUF_SIZE);
        } while (pending);

        if (iavf_is_reset_in_progress(adapter))
                goto freedom;

        /* check for error indications */
        val = rd32(hw, IAVF_VF_ARQLEN1);
        if (val == 0xdeadbeef || val == 0xffffffff) /* device in reset */
                goto freedom;
        oldval = val;
        if (val & IAVF_VF_ARQLEN1_ARQVFE_MASK) {
                dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
                val &= ~IAVF_VF_ARQLEN1_ARQVFE_MASK;
        }
        if (val & IAVF_VF_ARQLEN1_ARQOVFL_MASK) {
                dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
                val &= ~IAVF_VF_ARQLEN1_ARQOVFL_MASK;
        }
        if (val & IAVF_VF_ARQLEN1_ARQCRIT_MASK) {
                dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
                val &= ~IAVF_VF_ARQLEN1_ARQCRIT_MASK;
        }
        if (oldval != val)
                wr32(hw, IAVF_VF_ARQLEN1, val);

        val = rd32(hw, IAVF_VF_ATQLEN1);
        oldval = val;
        if (val & IAVF_VF_ATQLEN1_ATQVFE_MASK) {
                dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
                val &= ~IAVF_VF_ATQLEN1_ATQVFE_MASK;
        }
        if (val & IAVF_VF_ATQLEN1_ATQOVFL_MASK) {
                dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
                val &= ~IAVF_VF_ATQLEN1_ATQOVFL_MASK;
        }
        if (val & IAVF_VF_ATQLEN1_ATQCRIT_MASK) {
                dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
                val &= ~IAVF_VF_ATQLEN1_ATQCRIT_MASK;
        }
        if (oldval != val)
                wr32(hw, IAVF_VF_ATQLEN1, val);

freedom:
        kfree(event.msg_buf);
unlock:
        netdev_unlock(netdev);
        /* re-enable Admin queue interrupt cause */
        iavf_misc_irq_enable(adapter);
}

/**
 * iavf_free_all_tx_resources - Free Tx Resources for All Queues
 * @adapter: board private structure
 *
 * Free all transmit software resources
 **/
void iavf_free_all_tx_resources(struct iavf_adapter *adapter)
{
        int i;

        if (!adapter->tx_rings)
                return;

        for (i = 0; i < adapter->num_active_queues; i++)
                if (adapter->tx_rings[i].desc)
                        iavf_free_tx_resources(&adapter->tx_rings[i]);
}

/**
 * iavf_setup_all_tx_resources - allocate all queues Tx resources
 * @adapter: board private structure
 *
 * If this function returns with an error, then it's possible one or
 * more of the rings is populated (while the rest are not).  It is the
 * callers duty to clean those orphaned rings.
 *
 * Return 0 on success, negative on failure
 **/
static int iavf_setup_all_tx_resources(struct iavf_adapter *adapter)
{
        int i, err = 0;

        for (i = 0; i < adapter->num_active_queues; i++) {
                adapter->tx_rings[i].count = adapter->tx_desc_count;
                err = iavf_setup_tx_descriptors(&adapter->tx_rings[i]);
                if (!err)
                        continue;
                dev_err(&adapter->pdev->dev,
                        "Allocation for Tx Queue %u failed\n", i);
                break;
        }

        return err;
}

/**
 * iavf_setup_all_rx_resources - allocate all queues Rx resources
 * @adapter: board private structure
 *
 * If this function returns with an error, then it's possible one or
 * more of the rings is populated (while the rest are not).  It is the
 * callers duty to clean those orphaned rings.
 *
 * Return 0 on success, negative on failure
 **/
static int iavf_setup_all_rx_resources(struct iavf_adapter *adapter)
{
        int i, err = 0;

        for (i = 0; i < adapter->num_active_queues; i++) {
                adapter->rx_rings[i].count = adapter->rx_desc_count;
                err = iavf_setup_rx_descriptors(&adapter->rx_rings[i]);
                if (!err)
                        continue;
                dev_err(&adapter->pdev->dev,
                        "Allocation for Rx Queue %u failed\n", i);
                break;
        }
        return err;
}

/**
 * iavf_free_all_rx_resources - Free Rx Resources for All Queues
 * @adapter: board private structure
 *
 * Free all receive software resources
 **/
void iavf_free_all_rx_resources(struct iavf_adapter *adapter)
{
        int i;

        if (!adapter->rx_rings)
                return;

        for (i = 0; i < adapter->num_active_queues; i++)
                if (adapter->rx_rings[i].desc)
                        iavf_free_rx_resources(&adapter->rx_rings[i]);
}

/**
 * iavf_validate_tx_bandwidth - validate the max Tx bandwidth
 * @adapter: board private structure
 * @max_tx_rate: max Tx bw for a tc
 **/
static int iavf_validate_tx_bandwidth(struct iavf_adapter *adapter,
                                      u64 max_tx_rate)
{
        int speed = 0, ret = 0;

        if (ADV_LINK_SUPPORT(adapter)) {
                if (adapter->link_speed_mbps < U32_MAX) {
                        speed = adapter->link_speed_mbps;
                        goto validate_bw;
                } else {
                        dev_err(&adapter->pdev->dev, "Unknown link speed\n");
                        return -EINVAL;
                }
        }

        switch (adapter->link_speed) {
        case VIRTCHNL_LINK_SPEED_40GB:
                speed = SPEED_40000;
                break;
        case VIRTCHNL_LINK_SPEED_25GB:
                speed = SPEED_25000;
                break;
        case VIRTCHNL_LINK_SPEED_20GB:
                speed = SPEED_20000;
                break;
        case VIRTCHNL_LINK_SPEED_10GB:
                speed = SPEED_10000;
                break;
        case VIRTCHNL_LINK_SPEED_5GB:
                speed = SPEED_5000;
                break;
        case VIRTCHNL_LINK_SPEED_2_5GB:
                speed = SPEED_2500;
                break;
        case VIRTCHNL_LINK_SPEED_1GB:
                speed = SPEED_1000;
                break;
        case VIRTCHNL_LINK_SPEED_100MB:
                speed = SPEED_100;
                break;
        default:
                break;
        }

validate_bw:
        if (max_tx_rate > speed) {
                dev_err(&adapter->pdev->dev,
                        "Invalid tx rate specified\n");
                ret = -EINVAL;
        }

        return ret;
}

/**
 * iavf_validate_ch_config - validate queue mapping info
 * @adapter: board private structure
 * @mqprio_qopt: queue parameters
 *
 * This function validates if the config provided by the user to
 * configure queue channels is valid or not. Returns 0 on a valid
 * config.
 **/
static int iavf_validate_ch_config(struct iavf_adapter *adapter,
                                   struct tc_mqprio_qopt_offload *mqprio_qopt)
{
        u64 total_max_rate = 0;
        u32 tx_rate_rem = 0;
        int i, num_qps = 0;
        u64 tx_rate = 0;
        int ret = 0;

        if (mqprio_qopt->qopt.num_tc > IAVF_MAX_TRAFFIC_CLASS ||
            mqprio_qopt->qopt.num_tc < 1)
                return -EINVAL;

        for (i = 0; i <= mqprio_qopt->qopt.num_tc - 1; i++) {
                if (!mqprio_qopt->qopt.count[i] ||
                    mqprio_qopt->qopt.offset[i] != num_qps)
                        return -EINVAL;
                if (mqprio_qopt->min_rate[i]) {
                        dev_err(&adapter->pdev->dev,
                                "Invalid min tx rate (greater than 0) specified for TC%d\n",
                                i);
                        return -EINVAL;
                }

                /* convert to Mbps */
                tx_rate = div_u64(mqprio_qopt->max_rate[i],
                                  IAVF_MBPS_DIVISOR);

                if (mqprio_qopt->max_rate[i] &&
                    tx_rate < IAVF_MBPS_QUANTA) {
                        dev_err(&adapter->pdev->dev,
                                "Invalid max tx rate for TC%d, minimum %dMbps\n",
                                i, IAVF_MBPS_QUANTA);
                        return -EINVAL;
                }

                (void)div_u64_rem(tx_rate, IAVF_MBPS_QUANTA, &tx_rate_rem);

                if (tx_rate_rem != 0) {
                        dev_err(&adapter->pdev->dev,
                                "Invalid max tx rate for TC%d, not divisible by %d\n",
                                i, IAVF_MBPS_QUANTA);
                        return -EINVAL;
                }

                total_max_rate += tx_rate;
                num_qps += mqprio_qopt->qopt.count[i];
        }
        if (num_qps > adapter->num_active_queues) {
                dev_err(&adapter->pdev->dev,
                        "Cannot support requested number of queues\n");
                return -EINVAL;
        }

        ret = iavf_validate_tx_bandwidth(adapter, total_max_rate);
        return ret;
}

/**
 * iavf_del_all_cloud_filters - delete all cloud filters on the traffic classes
 * @adapter: board private structure
 **/
static void iavf_del_all_cloud_filters(struct iavf_adapter *adapter)
{
        struct iavf_cloud_filter *cf, *cftmp;

        spin_lock_bh(&adapter->cloud_filter_list_lock);
        list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list,
                                 list) {
                list_del(&cf->list);
                kfree(cf);
                adapter->num_cloud_filters--;
        }
        spin_unlock_bh(&adapter->cloud_filter_list_lock);
}

/**
 * iavf_is_tc_config_same - Compare the mqprio TC config with the
 * TC config already configured on this adapter.
 * @adapter: board private structure
 * @mqprio_qopt: TC config received from kernel.
 *
 * This function compares the TC config received from the kernel
 * with the config already configured on the adapter.
 *
 * Return: True if configuration is same, false otherwise.
 **/
static bool iavf_is_tc_config_same(struct iavf_adapter *adapter,
                                   struct tc_mqprio_qopt *mqprio_qopt)
{
        struct virtchnl_channel_info *ch = &adapter->ch_config.ch_info[0];
        int i;

        if (adapter->num_tc != mqprio_qopt->num_tc)
                return false;

        for (i = 0; i < adapter->num_tc; i++) {
                if (ch[i].count != mqprio_qopt->count[i] ||
                    ch[i].offset != mqprio_qopt->offset[i])
                        return false;
        }
        return true;
}

/**
 * __iavf_setup_tc - configure multiple traffic classes
 * @netdev: network interface device structure
 * @type_data: tc offload data
 *
 * This function processes the config information provided by the
 * user to configure traffic classes/queue channels and packages the
 * information to request the PF to setup traffic classes.
 *
 * Returns 0 on success.
 **/
static int __iavf_setup_tc(struct net_device *netdev, void *type_data)
{
        struct tc_mqprio_qopt_offload *mqprio_qopt = type_data;
        struct iavf_adapter *adapter = netdev_priv(netdev);
        struct virtchnl_vf_resource *vfres = adapter->vf_res;
        u8 num_tc = 0, total_qps = 0;
        int ret = 0, netdev_tc = 0;
        u64 max_tx_rate;
        u16 mode;
        int i;

        num_tc = mqprio_qopt->qopt.num_tc;
        mode = mqprio_qopt->mode;

        /* delete queue_channel */
        if (!mqprio_qopt->qopt.hw) {
                if (adapter->ch_config.state == __IAVF_TC_RUNNING) {
                        /* reset the tc configuration */
                        netdev_reset_tc(netdev);
                        adapter->num_tc = 0;
                        netif_tx_stop_all_queues(netdev);
                        netif_tx_disable(netdev);
                        iavf_del_all_cloud_filters(adapter);
                        adapter->aq_required = IAVF_FLAG_AQ_DISABLE_CHANNELS;
                        total_qps = adapter->orig_num_active_queues;
                        goto exit;
                } else {
                        return -EINVAL;
                }
        }

        /* add queue channel */
        if (mode == TC_MQPRIO_MODE_CHANNEL) {
                if (!(vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ)) {
                        dev_err(&adapter->pdev->dev, "ADq not supported\n");
                        return -EOPNOTSUPP;
                }
                if (adapter->ch_config.state != __IAVF_TC_INVALID) {
                        dev_err(&adapter->pdev->dev, "TC configuration already exists\n");
                        return -EINVAL;
                }

                ret = iavf_validate_ch_config(adapter, mqprio_qopt);
                if (ret)
                        return ret;
                /* Return if same TC config is requested */
                if (iavf_is_tc_config_same(adapter, &mqprio_qopt->qopt))
                        return 0;
                adapter->num_tc = num_tc;

                for (i = 0; i < IAVF_MAX_TRAFFIC_CLASS; i++) {
                        if (i < num_tc) {
                                adapter->ch_config.ch_info[i].count =
                                        mqprio_qopt->qopt.count[i];
                                adapter->ch_config.ch_info[i].offset =
                                        mqprio_qopt->qopt.offset[i];
                                total_qps += mqprio_qopt->qopt.count[i];
                                max_tx_rate = mqprio_qopt->max_rate[i];
                                /* convert to Mbps */
                                max_tx_rate = div_u64(max_tx_rate,
                                                      IAVF_MBPS_DIVISOR);
                                adapter->ch_config.ch_info[i].max_tx_rate =
                                        max_tx_rate;
                        } else {
                                adapter->ch_config.ch_info[i].count = 1;
                                adapter->ch_config.ch_info[i].offset = 0;
                        }
                }

                /* Take snapshot of original config such as "num_active_queues"
                 * It is used later when delete ADQ flow is exercised, so that
                 * once delete ADQ flow completes, VF shall go back to its
                 * original queue configuration
                 */

                adapter->orig_num_active_queues = adapter->num_active_queues;

                /* Store queue info based on TC so that VF gets configured
                 * with correct number of queues when VF completes ADQ config
                 * flow
                 */
                adapter->ch_config.total_qps = total_qps;

                netif_tx_stop_all_queues(netdev);
                netif_tx_disable(netdev);
                adapter->aq_required |= IAVF_FLAG_AQ_ENABLE_CHANNELS;
                netdev_reset_tc(netdev);
                /* Report the tc mapping up the stack */
                netdev_set_num_tc(adapter->netdev, num_tc);
                for (i = 0; i < IAVF_MAX_TRAFFIC_CLASS; i++) {
                        u16 qcount = mqprio_qopt->qopt.count[i];
                        u16 qoffset = mqprio_qopt->qopt.offset[i];

                        if (i < num_tc)
                                netdev_set_tc_queue(netdev, netdev_tc++, qcount,
                                                    qoffset);
                }
        }
exit:
        if (test_bit(__IAVF_IN_REMOVE_TASK, &adapter->crit_section))
                return 0;

        netif_set_real_num_rx_queues(netdev, total_qps);
        netif_set_real_num_tx_queues(netdev, total_qps);

        return ret;
}

/**
 * iavf_parse_cls_flower - Parse tc flower filters provided by kernel
 * @adapter: board private structure
 * @f: pointer to struct flow_cls_offload
 * @filter: pointer to cloud filter structure
 */
static int iavf_parse_cls_flower(struct iavf_adapter *adapter,
                                 struct flow_cls_offload *f,
                                 struct iavf_cloud_filter *filter)
{
        struct flow_rule *rule = flow_cls_offload_flow_rule(f);
        struct flow_dissector *dissector = rule->match.dissector;
        u16 n_proto_mask = 0;
        u16 n_proto_key = 0;
        u8 field_flags = 0;
        u16 addr_type = 0;
        u16 n_proto = 0;
        int i = 0;
        struct virtchnl_filter *vf = &filter->f;

        if (dissector->used_keys &
            ~(BIT_ULL(FLOW_DISSECTOR_KEY_CONTROL) |
              BIT_ULL(FLOW_DISSECTOR_KEY_BASIC) |
              BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
              BIT_ULL(FLOW_DISSECTOR_KEY_VLAN) |
              BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
              BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
              BIT_ULL(FLOW_DISSECTOR_KEY_PORTS) |
              BIT_ULL(FLOW_DISSECTOR_KEY_ENC_KEYID))) {
                dev_err(&adapter->pdev->dev, "Unsupported key used: 0x%llx\n",
                        dissector->used_keys);
                return -EOPNOTSUPP;
        }

        if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
                struct flow_match_enc_keyid match;

                flow_rule_match_enc_keyid(rule, &match);
                if (match.mask->keyid != 0)
                        field_flags |= IAVF_CLOUD_FIELD_TEN_ID;
        }

        if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
                struct flow_match_basic match;

                flow_rule_match_basic(rule, &match);
                n_proto_key = ntohs(match.key->n_proto);
                n_proto_mask = ntohs(match.mask->n_proto);

                if (n_proto_key == ETH_P_ALL) {
                        n_proto_key = 0;
                        n_proto_mask = 0;
                }
                n_proto = n_proto_key & n_proto_mask;
                if (n_proto != ETH_P_IP && n_proto != ETH_P_IPV6)
                        return -EINVAL;
                if (n_proto == ETH_P_IPV6) {
                        /* specify flow type as TCP IPv6 */
                        vf->flow_type = VIRTCHNL_TCP_V6_FLOW;
                }

                if (match.key->ip_proto != IPPROTO_TCP) {
                        dev_info(&adapter->pdev->dev, "Only TCP transport is supported\n");
                        return -EINVAL;
                }
        }

        if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
                struct flow_match_eth_addrs match;

                flow_rule_match_eth_addrs(rule, &match);

                /* use is_broadcast and is_zero to check for all 0xf or 0 */
                if (!is_zero_ether_addr(match.mask->dst)) {
                        if (is_broadcast_ether_addr(match.mask->dst)) {
                                field_flags |= IAVF_CLOUD_FIELD_OMAC;
                        } else {
                                dev_err(&adapter->pdev->dev, "Bad ether dest mask %pM\n",
                                        match.mask->dst);
                                return -EINVAL;
                        }
                }

                if (!is_zero_ether_addr(match.mask->src)) {
                        if (is_broadcast_ether_addr(match.mask->src)) {
                                field_flags |= IAVF_CLOUD_FIELD_IMAC;
                        } else {
                                dev_err(&adapter->pdev->dev, "Bad ether src mask %pM\n",
                                        match.mask->src);
                                return -EINVAL;
                        }
                }

                if (!is_zero_ether_addr(match.key->dst))
                        if (is_valid_ether_addr(match.key->dst) ||
                            is_multicast_ether_addr(match.key->dst)) {
                                /* set the mask if a valid dst_mac address */
                                for (i = 0; i < ETH_ALEN; i++)
                                        vf->mask.tcp_spec.dst_mac[i] |= 0xff;
                                ether_addr_copy(vf->data.tcp_spec.dst_mac,
                                                match.key->dst);
                        }

                if (!is_zero_ether_addr(match.key->src))
                        if (is_valid_ether_addr(match.key->src) ||
                            is_multicast_ether_addr(match.key->src)) {
                                /* set the mask if a valid dst_mac address */
                                for (i = 0; i < ETH_ALEN; i++)
                                        vf->mask.tcp_spec.src_mac[i] |= 0xff;
                                ether_addr_copy(vf->data.tcp_spec.src_mac,
                                                match.key->src);
                }
        }

        if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) {
                struct flow_match_vlan match;

                flow_rule_match_vlan(rule, &match);
                if (match.mask->vlan_id) {
                        if (match.mask->vlan_id == VLAN_VID_MASK) {
                                field_flags |= IAVF_CLOUD_FIELD_IVLAN;
                        } else {
                                dev_err(&adapter->pdev->dev, "Bad vlan mask %u\n",
                                        match.mask->vlan_id);
                                return -EINVAL;
                        }
                }
                vf->mask.tcp_spec.vlan_id |= cpu_to_be16(0xffff);
                vf->data.tcp_spec.vlan_id = cpu_to_be16(match.key->vlan_id);
        }

        if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) {
                struct flow_match_control match;

                flow_rule_match_control(rule, &match);
                addr_type = match.key->addr_type;

                if (flow_rule_has_control_flags(match.mask->flags,
                                                f->common.extack))
                        return -EOPNOTSUPP;
        }

        if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
                struct flow_match_ipv4_addrs match;

                flow_rule_match_ipv4_addrs(rule, &match);
                if (match.mask->dst) {
                        if (match.mask->dst == cpu_to_be32(0xffffffff)) {
                                field_flags |= IAVF_CLOUD_FIELD_IIP;
                        } else {
                                dev_err(&adapter->pdev->dev, "Bad ip dst mask 0x%08x\n",
                                        be32_to_cpu(match.mask->dst));
                                return -EINVAL;
                        }
                }

                if (match.mask->src) {
                        if (match.mask->src == cpu_to_be32(0xffffffff)) {
                                field_flags |= IAVF_CLOUD_FIELD_IIP;
                        } else {
                                dev_err(&adapter->pdev->dev, "Bad ip src mask 0x%08x\n",
                                        be32_to_cpu(match.mask->src));
                                return -EINVAL;
                        }
                }

                if (field_flags & IAVF_CLOUD_FIELD_TEN_ID) {
                        dev_info(&adapter->pdev->dev, "Tenant id not allowed for ip filter\n");
                        return -EINVAL;
                }
                if (match.key->dst) {
                        vf->mask.tcp_spec.dst_ip[0] |= cpu_to_be32(0xffffffff);
                        vf->data.tcp_spec.dst_ip[0] = match.key->dst;
                }
                if (match.key->src) {
                        vf->mask.tcp_spec.src_ip[0] |= cpu_to_be32(0xffffffff);
                        vf->data.tcp_spec.src_ip[0] = match.key->src;
                }
        }

        if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
                struct flow_match_ipv6_addrs match;

                flow_rule_match_ipv6_addrs(rule, &match);

                /* validate mask, make sure it is not IPV6_ADDR_ANY */
                if (ipv6_addr_any(&match.mask->dst)) {
                        dev_err(&adapter->pdev->dev, "Bad ipv6 dst mask 0x%02x\n",
                                IPV6_ADDR_ANY);
                        return -EINVAL;
                }

                /* src and dest IPv6 address should not be LOOPBACK
                 * (0:0:0:0:0:0:0:1) which can be represented as ::1
                 */
                if (ipv6_addr_loopback(&match.key->dst) ||
                    ipv6_addr_loopback(&match.key->src)) {
                        dev_err(&adapter->pdev->dev,
                                "ipv6 addr should not be loopback\n");
                        return -EINVAL;
                }
                if (!ipv6_addr_any(&match.mask->dst) ||
                    !ipv6_addr_any(&match.mask->src))
                        field_flags |= IAVF_CLOUD_FIELD_IIP;

                for (i = 0; i < 4; i++)
                        vf->mask.tcp_spec.dst_ip[i] |= cpu_to_be32(0xffffffff);
                memcpy(&vf->data.tcp_spec.dst_ip, &match.key->dst.s6_addr32,
                       sizeof(vf->data.tcp_spec.dst_ip));
                for (i = 0; i < 4; i++)
                        vf->mask.tcp_spec.src_ip[i] |= cpu_to_be32(0xffffffff);
                memcpy(&vf->data.tcp_spec.src_ip, &match.key->src.s6_addr32,
                       sizeof(vf->data.tcp_spec.src_ip));
        }
        if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) {
                struct flow_match_ports match;

                flow_rule_match_ports(rule, &match);
                if (match.mask->src) {
                        if (match.mask->src == cpu_to_be16(0xffff)) {
                                field_flags |= IAVF_CLOUD_FIELD_IIP;
                        } else {
                                dev_err(&adapter->pdev->dev, "Bad src port mask %u\n",
                                        be16_to_cpu(match.mask->src));
                                return -EINVAL;
                        }
                }

                if (match.mask->dst) {
                        if (match.mask->dst == cpu_to_be16(0xffff)) {
                                field_flags |= IAVF_CLOUD_FIELD_IIP;
                        } else {
                                dev_err(&adapter->pdev->dev, "Bad dst port mask %u\n",
                                        be16_to_cpu(match.mask->dst));
                                return -EINVAL;
                        }
                }
                if (match.key->dst) {
                        vf->mask.tcp_spec.dst_port |= cpu_to_be16(0xffff);
                        vf->data.tcp_spec.dst_port = match.key->dst;
                }

                if (match.key->src) {
                        vf->mask.tcp_spec.src_port |= cpu_to_be16(0xffff);
                        vf->data.tcp_spec.src_port = match.key->src;
                }
        }
        vf->field_flags = field_flags;

        return 0;
}

/**
 * iavf_handle_tclass - Forward to a traffic class on the device
 * @adapter: board private structure
 * @tc: traffic class index on the device
 * @filter: pointer to cloud filter structure
 */
static int iavf_handle_tclass(struct iavf_adapter *adapter, u32 tc,
                              struct iavf_cloud_filter *filter)
{
        if (tc == 0)
                return 0;
        if (tc < adapter->num_tc) {
                if (!filter->f.data.tcp_spec.dst_port) {
                        dev_err(&adapter->pdev->dev,
                                "Specify destination port to redirect to traffic class other than TC0\n");
                        return -EINVAL;
                }
        }
        /* redirect to a traffic class on the same device */
        filter->f.action = VIRTCHNL_ACTION_TC_REDIRECT;
        filter->f.action_meta = tc;
        return 0;
}

/**
 * iavf_find_cf - Find the cloud filter in the list
 * @adapter: Board private structure
 * @cookie: filter specific cookie
 *
 * Returns ptr to the filter object or NULL. Must be called while holding the
 * cloud_filter_list_lock.
 */
static struct iavf_cloud_filter *iavf_find_cf(struct iavf_adapter *adapter,
                                              unsigned long *cookie)
{
        struct iavf_cloud_filter *filter = NULL;

        if (!cookie)
                return NULL;

        list_for_each_entry(filter, &adapter->cloud_filter_list, list) {
                if (!memcmp(cookie, &filter->cookie, sizeof(filter->cookie)))
                        return filter;
        }
        return NULL;
}

/**
 * iavf_configure_clsflower - Add tc flower filters
 * @adapter: board private structure
 * @cls_flower: Pointer to struct flow_cls_offload
 */
static int iavf_configure_clsflower(struct iavf_adapter *adapter,
                                    struct flow_cls_offload *cls_flower)
{
        int tc = tc_classid_to_hwtc(adapter->netdev, cls_flower->classid);
        struct iavf_cloud_filter *filter;
        int err;

        if (tc < 0) {
                dev_err(&adapter->pdev->dev, "Invalid traffic class\n");
                return -EINVAL;
        }

        filter = kzalloc_obj(*filter);
        if (!filter)
                return -ENOMEM;
        filter->cookie = cls_flower->cookie;

        netdev_lock(adapter->netdev);

        /* bail out here if filter already exists */
        spin_lock_bh(&adapter->cloud_filter_list_lock);
        if (iavf_find_cf(adapter, &cls_flower->cookie)) {
                dev_err(&adapter->pdev->dev, "Failed to add TC Flower filter, it already exists\n");
                err = -EEXIST;
                goto spin_unlock;
        }
        spin_unlock_bh(&adapter->cloud_filter_list_lock);

        /* set the mask to all zeroes to begin with */
        memset(&filter->f.mask.tcp_spec, 0, sizeof(struct virtchnl_l4_spec));
        /* start out with flow type and eth type IPv4 to begin with */
        filter->f.flow_type = VIRTCHNL_TCP_V4_FLOW;
        err = iavf_parse_cls_flower(adapter, cls_flower, filter);
        if (err)
                goto err;

        err = iavf_handle_tclass(adapter, tc, filter);
        if (err)
                goto err;

        /* add filter to the list */
        spin_lock_bh(&adapter->cloud_filter_list_lock);
        list_add_tail(&filter->list, &adapter->cloud_filter_list);
        adapter->num_cloud_filters++;
        filter->add = true;
        adapter->aq_required |= IAVF_FLAG_AQ_ADD_CLOUD_FILTER;
spin_unlock:
        spin_unlock_bh(&adapter->cloud_filter_list_lock);
err:
        if (err)
                kfree(filter);

        netdev_unlock(adapter->netdev);
        return err;
}

/**
 * iavf_delete_clsflower - Remove tc flower filters
 * @adapter: board private structure
 * @cls_flower: Pointer to struct flow_cls_offload
 */
static int iavf_delete_clsflower(struct iavf_adapter *adapter,
                                 struct flow_cls_offload *cls_flower)
{
        struct iavf_cloud_filter *filter = NULL;
        int err = 0;

        spin_lock_bh(&adapter->cloud_filter_list_lock);
        filter = iavf_find_cf(adapter, &cls_flower->cookie);
        if (filter) {
                filter->del = true;
                adapter->aq_required |= IAVF_FLAG_AQ_DEL_CLOUD_FILTER;
        } else {
                err = -EINVAL;
        }
        spin_unlock_bh(&adapter->cloud_filter_list_lock);

        return err;
}

/**
 * iavf_setup_tc_cls_flower - flower classifier offloads
 * @adapter: pointer to iavf adapter structure
 * @cls_flower: pointer to flow_cls_offload struct with flow info
 */
static int iavf_setup_tc_cls_flower(struct iavf_adapter *adapter,
                                    struct flow_cls_offload *cls_flower)
{
        switch (cls_flower->command) {
        case FLOW_CLS_REPLACE:
                return iavf_configure_clsflower(adapter, cls_flower);
        case FLOW_CLS_DESTROY:
                return iavf_delete_clsflower(adapter, cls_flower);
        case FLOW_CLS_STATS:
                return -EOPNOTSUPP;
        default:
                return -EOPNOTSUPP;
        }
}

/**
 * iavf_add_cls_u32 - Add U32 classifier offloads
 * @adapter: pointer to iavf adapter structure
 * @cls_u32: pointer to tc_cls_u32_offload struct with flow info
 *
 * Return: 0 on success or negative errno on failure.
 */
static int iavf_add_cls_u32(struct iavf_adapter *adapter,
                            struct tc_cls_u32_offload *cls_u32)
{
        struct netlink_ext_ack *extack = cls_u32->common.extack;
        struct virtchnl_fdir_rule *rule_cfg;
        struct virtchnl_filter_action *vact;
        struct virtchnl_proto_hdrs *hdrs;
        struct ethhdr *spec_h, *mask_h;
        const struct tc_action *act;
        struct iavf_fdir_fltr *fltr;
        struct tcf_exts *exts;
        unsigned int q_index;
        int i, status = 0;
        int off_base = 0;

        if (cls_u32->knode.link_handle) {
                NL_SET_ERR_MSG_MOD(extack, "Linking not supported");
                return -EOPNOTSUPP;
        }

        fltr = kzalloc_obj(*fltr);
        if (!fltr)
                return -ENOMEM;

        rule_cfg = &fltr->vc_add_msg.rule_cfg;
        hdrs = &rule_cfg->proto_hdrs;
        hdrs->count = 0;

        /* The parser lib at the PF expects the packet starting with MAC hdr */
        switch (ntohs(cls_u32->common.protocol)) {
        case ETH_P_802_3:
                break;
        case ETH_P_IP:
                spec_h = (struct ethhdr *)hdrs->raw.spec;
                mask_h = (struct ethhdr *)hdrs->raw.mask;
                spec_h->h_proto = htons(ETH_P_IP);
                mask_h->h_proto = htons(0xFFFF);
                off_base += ETH_HLEN;
                break;
        default:
                NL_SET_ERR_MSG_MOD(extack, "Only 802_3 and ip filter protocols are supported");
                status = -EOPNOTSUPP;
                goto free_alloc;
        }

        for (i = 0; i < cls_u32->knode.sel->nkeys; i++) {
                __be32 val, mask;
                int off;

                off = off_base + cls_u32->knode.sel->keys[i].off;
                val = cls_u32->knode.sel->keys[i].val;
                mask = cls_u32->knode.sel->keys[i].mask;

                if (off >= sizeof(hdrs->raw.spec)) {
                        NL_SET_ERR_MSG_MOD(extack, "Input exceeds maximum allowed.");
                        status = -EINVAL;
                        goto free_alloc;
                }

                memcpy(&hdrs->raw.spec[off], &val, sizeof(val));
                memcpy(&hdrs->raw.mask[off], &mask, sizeof(mask));
                hdrs->raw.pkt_len = off + sizeof(val);
        }

        /* Only one action is allowed */
        rule_cfg->action_set.count = 1;
        vact = &rule_cfg->action_set.actions[0];
        exts = cls_u32->knode.exts;

        tcf_exts_for_each_action(i, act, exts) {
                /* FDIR queue */
                if (is_tcf_skbedit_rx_queue_mapping(act)) {
                        q_index = tcf_skbedit_rx_queue_mapping(act);
                        if (q_index >= adapter->num_active_queues) {
                                status = -EINVAL;
                                goto free_alloc;
                        }

                        vact->type = VIRTCHNL_ACTION_QUEUE;
                        vact->act_conf.queue.index = q_index;
                        break;
                }

                /* Drop */
                if (is_tcf_gact_shot(act)) {
                        vact->type = VIRTCHNL_ACTION_DROP;
                        break;
                }

                /* Unsupported action */
                NL_SET_ERR_MSG_MOD(extack, "Unsupported action.");
                status = -EOPNOTSUPP;
                goto free_alloc;
        }

        fltr->vc_add_msg.vsi_id = adapter->vsi.id;
        fltr->cls_u32_handle = cls_u32->knode.handle;
        return iavf_fdir_add_fltr(adapter, fltr);

free_alloc:
        kfree(fltr);
        return status;
}

/**
 * iavf_del_cls_u32 - Delete U32 classifier offloads
 * @adapter: pointer to iavf adapter structure
 * @cls_u32: pointer to tc_cls_u32_offload struct with flow info
 *
 * Return: 0 on success or negative errno on failure.
 */
static int iavf_del_cls_u32(struct iavf_adapter *adapter,
                            struct tc_cls_u32_offload *cls_u32)
{
        return iavf_fdir_del_fltr(adapter, true, cls_u32->knode.handle);
}

/**
 * iavf_setup_tc_cls_u32 - U32 filter offloads
 * @adapter: pointer to iavf adapter structure
 * @cls_u32: pointer to tc_cls_u32_offload struct with flow info
 *
 * Return: 0 on success or negative errno on failure.
 */
static int iavf_setup_tc_cls_u32(struct iavf_adapter *adapter,
                                 struct tc_cls_u32_offload *cls_u32)
{
        if (!TC_U32_SUPPORT(adapter) || !FDIR_FLTR_SUPPORT(adapter))
                return -EOPNOTSUPP;

        switch (cls_u32->command) {
        case TC_CLSU32_NEW_KNODE:
        case TC_CLSU32_REPLACE_KNODE:
                return iavf_add_cls_u32(adapter, cls_u32);
        case TC_CLSU32_DELETE_KNODE:
                return iavf_del_cls_u32(adapter, cls_u32);
        default:
                return -EOPNOTSUPP;
        }
}

/**
 * iavf_setup_tc_block_cb - block callback for tc
 * @type: type of offload
 * @type_data: offload data
 * @cb_priv:
 *
 * This function is the block callback for traffic classes
 **/
static int iavf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
                                  void *cb_priv)
{
        struct iavf_adapter *adapter = cb_priv;

        if (!tc_cls_can_offload_and_chain0(adapter->netdev, type_data))
                return -EOPNOTSUPP;

        switch (type) {
        case TC_SETUP_CLSFLOWER:
                return iavf_setup_tc_cls_flower(cb_priv, type_data);
        case TC_SETUP_CLSU32:
                return iavf_setup_tc_cls_u32(cb_priv, type_data);
        default:
                return -EOPNOTSUPP;
        }
}

static LIST_HEAD(iavf_block_cb_list);

/**
 * iavf_setup_tc - configure multiple traffic classes
 * @netdev: network interface device structure
 * @type: type of offload
 * @type_data: tc offload data
 *
 * This function is the callback to ndo_setup_tc in the
 * netdev_ops.
 *
 * Returns 0 on success
 **/
static int iavf_setup_tc(struct net_device *netdev, enum tc_setup_type type,
                         void *type_data)
{
        struct iavf_adapter *adapter = netdev_priv(netdev);

        switch (type) {
        case TC_SETUP_QDISC_MQPRIO:
                return __iavf_setup_tc(netdev, type_data);
        case TC_SETUP_BLOCK:
                return flow_block_cb_setup_simple(type_data,
                                                  &iavf_block_cb_list,
                                                  iavf_setup_tc_block_cb,
                                                  adapter, adapter, true);
        default:
                return -EOPNOTSUPP;
        }
}

/**
 * iavf_restore_fdir_filters
 * @adapter: board private structure
 *
 * Restore existing FDIR filters when VF netdev comes back up.
 **/
static void iavf_restore_fdir_filters(struct iavf_adapter *adapter)
{
        struct iavf_fdir_fltr *f;

        spin_lock_bh(&adapter->fdir_fltr_lock);
        list_for_each_entry(f, &adapter->fdir_list_head, list) {
                if (f->state == IAVF_FDIR_FLTR_DIS_REQUEST) {
                        /* Cancel a request, keep filter as active */
                        f->state = IAVF_FDIR_FLTR_ACTIVE;
                } else if (f->state == IAVF_FDIR_FLTR_DIS_PENDING ||
                           f->state == IAVF_FDIR_FLTR_INACTIVE) {
                        /* Add filters which are inactive or have a pending
                         * request to PF to be deleted
                         */
                        f->state = IAVF_FDIR_FLTR_ADD_REQUEST;
                        adapter->aq_required |= IAVF_FLAG_AQ_ADD_FDIR_FILTER;
                }
        }
        spin_unlock_bh(&adapter->fdir_fltr_lock);
}

/**
 * iavf_open - Called when a network interface is made active
 * @netdev: network interface device structure
 *
 * Returns 0 on success, negative value on failure
 *
 * The open entry point is called when a network interface is made
 * active by the system (IFF_UP).  At this point all resources needed
 * for transmit and receive operations are allocated, the interrupt
 * handler is registered with the OS, the watchdog is started,
 * and the stack is notified that the interface is ready.
 **/
static int iavf_open(struct net_device *netdev)
{
        struct iavf_adapter *adapter = netdev_priv(netdev);
        int err;

        netdev_assert_locked(netdev);

        if (adapter->flags & IAVF_FLAG_PF_COMMS_FAILED) {
                dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
                return -EIO;
        }

        if (adapter->state != __IAVF_DOWN)
                return -EBUSY;

        if (adapter->state == __IAVF_RUNNING &&
            !test_bit(__IAVF_VSI_DOWN, adapter->vsi.state)) {
                dev_dbg(&adapter->pdev->dev, "VF is already open.\n");
                return 0;
        }

        /* allocate transmit descriptors */
        err = iavf_setup_all_tx_resources(adapter);
        if (err)
                goto err_setup_tx;

        /* allocate receive descriptors */
        err = iavf_setup_all_rx_resources(adapter);
        if (err)
                goto err_setup_rx;

        /* clear any pending interrupts, may auto mask */
        err = iavf_request_traffic_irqs(adapter, netdev->name);
        if (err)
                goto err_req_irq;

        spin_lock_bh(&adapter->mac_vlan_list_lock);
        iavf_add_filter(adapter, adapter->hw.mac.addr);
        spin_unlock_bh(&adapter->mac_vlan_list_lock);

        /* Restore filters that were removed with IFF_DOWN */
        iavf_restore_filters(adapter);
        iavf_restore_fdir_filters(adapter);

        iavf_configure(adapter);

        iavf_up_complete(adapter);

        iavf_irq_enable(adapter, true);

        return 0;

err_req_irq:
        iavf_down(adapter);
        iavf_free_traffic_irqs(adapter);
err_setup_rx:
        iavf_free_all_rx_resources(adapter);
err_setup_tx:
        iavf_free_all_tx_resources(adapter);

        return err;
}

/**
 * iavf_close - Disables a network interface
 * @netdev: network interface device structure
 *
 * Returns 0, this is not allowed to fail
 *
 * The close entry point is called when an interface is de-activated
 * by the OS.  The hardware is still under the drivers control, but
 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
 * are freed, along with all transmit and receive resources.
 **/
static int iavf_close(struct net_device *netdev)
{
        struct iavf_adapter *adapter = netdev_priv(netdev);
        u64 aq_to_restore;
        int status;

        netdev_assert_locked(netdev);

        if (adapter->state <= __IAVF_DOWN_PENDING)
                return 0;

        set_bit(__IAVF_VSI_DOWN, adapter->vsi.state);
        /* We cannot send IAVF_FLAG_AQ_GET_OFFLOAD_VLAN_V2_CAPS before
         * IAVF_FLAG_AQ_DISABLE_QUEUES because in such case there is rtnl
         * deadlock with adminq_task() until iavf_close timeouts. We must send
         * IAVF_FLAG_AQ_GET_CONFIG before IAVF_FLAG_AQ_DISABLE_QUEUES to make
         * disable queues possible for vf. Give only necessary flags to
         * iavf_down and save other to set them right before iavf_close()
         * returns, when IAVF_FLAG_AQ_DISABLE_QUEUES will be already sent and
         * iavf will be in DOWN state.
         */
        aq_to_restore = adapter->aq_required;
        adapter->aq_required &= IAVF_FLAG_AQ_GET_CONFIG;

        /* Remove flags which we do not want to send after close or we want to
         * send before disable queues.
         */
        aq_to_restore &= ~(IAVF_FLAG_AQ_GET_CONFIG              |
                           IAVF_FLAG_AQ_ENABLE_QUEUES           |
                           IAVF_FLAG_AQ_CONFIGURE_QUEUES        |
                           IAVF_FLAG_AQ_ADD_VLAN_FILTER         |
                           IAVF_FLAG_AQ_ADD_MAC_FILTER          |
                           IAVF_FLAG_AQ_ADD_CLOUD_FILTER        |
                           IAVF_FLAG_AQ_ADD_FDIR_FILTER         |
                           IAVF_FLAG_AQ_ADD_ADV_RSS_CFG);

        iavf_down(adapter);
        iavf_change_state(adapter, __IAVF_DOWN_PENDING);
        iavf_free_traffic_irqs(adapter);

        netdev_unlock(netdev);

        /* We explicitly don't free resources here because the hardware is
         * still active and can DMA into memory. Resources are cleared in
         * iavf_virtchnl_completion() after we get confirmation from the PF
         * driver that the rings have been stopped.
         *
         * Also, we wait for state to transition to __IAVF_DOWN before
         * returning. State change occurs in iavf_virtchnl_completion() after
         * VF resources are released (which occurs after PF driver processes and
         * responds to admin queue commands).
         */

        status = wait_event_timeout(adapter->down_waitqueue,
                                    adapter->state == __IAVF_DOWN,
                                    msecs_to_jiffies(500));
        if (!status)
                netdev_warn(netdev, "Device resources not yet released\n");
        netdev_lock(netdev);

        adapter->aq_required |= aq_to_restore;

        return 0;
}

/**
 * iavf_change_mtu - Change the Maximum Transfer Unit
 * @netdev: network interface device structure
 * @new_mtu: new value for maximum frame size
 *
 * Returns 0 on success, negative on failure
 **/
static int iavf_change_mtu(struct net_device *netdev, int new_mtu)
{
        struct iavf_adapter *adapter = netdev_priv(netdev);

        netdev_dbg(netdev, "changing MTU from %d to %d\n",
                   netdev->mtu, new_mtu);
        WRITE_ONCE(netdev->mtu, new_mtu);

        if (netif_running(netdev)) {
                adapter->flags |= IAVF_FLAG_RESET_NEEDED;
                iavf_reset_step(adapter);
        }

        return 0;
}

/**
 * iavf_disable_fdir - disable Flow Director and clear existing filters
 * @adapter: board private structure
 **/
static void iavf_disable_fdir(struct iavf_adapter *adapter)
{
        struct iavf_fdir_fltr *fdir, *fdirtmp;
        bool del_filters = false;

        adapter->flags &= ~IAVF_FLAG_FDIR_ENABLED;

        /* remove all Flow Director filters */
        spin_lock_bh(&adapter->fdir_fltr_lock);
        list_for_each_entry_safe(fdir, fdirtmp, &adapter->fdir_list_head,
                                 list) {
                if (fdir->state == IAVF_FDIR_FLTR_ADD_REQUEST ||
                    fdir->state == IAVF_FDIR_FLTR_INACTIVE) {
                        /* Delete filters not registered in PF */
                        list_del(&fdir->list);
                        iavf_dec_fdir_active_fltr(adapter, fdir);
                        kfree(fdir);
                } else if (fdir->state == IAVF_FDIR_FLTR_ADD_PENDING ||
                           fdir->state == IAVF_FDIR_FLTR_DIS_REQUEST ||
                           fdir->state == IAVF_FDIR_FLTR_ACTIVE) {
                        /* Filters registered in PF, schedule their deletion */
                        fdir->state = IAVF_FDIR_FLTR_DEL_REQUEST;
                        del_filters = true;
                } else if (fdir->state == IAVF_FDIR_FLTR_DIS_PENDING) {
                        /* Request to delete filter already sent to PF, change
                         * state to DEL_PENDING to delete filter after PF's
                         * response, not set as INACTIVE
                         */
                        fdir->state = IAVF_FDIR_FLTR_DEL_PENDING;
                }
        }
        spin_unlock_bh(&adapter->fdir_fltr_lock);

        if (del_filters) {
                adapter->aq_required |= IAVF_FLAG_AQ_DEL_FDIR_FILTER;
                mod_delayed_work(adapter->wq, &adapter->watchdog_task, 0);
        }
}

#define NETIF_VLAN_OFFLOAD_FEATURES     (NETIF_F_HW_VLAN_CTAG_RX | \
                                         NETIF_F_HW_VLAN_CTAG_TX | \
                                         NETIF_F_HW_VLAN_STAG_RX | \
                                         NETIF_F_HW_VLAN_STAG_TX)

/**
 * iavf_set_features - set the netdev feature flags
 * @netdev: ptr to the netdev being adjusted
 * @features: the feature set that the stack is suggesting
 * Note: expects to be called while under rtnl_lock()
 **/
static int iavf_set_features(struct net_device *netdev,
                             netdev_features_t features)
{
        struct iavf_adapter *adapter = netdev_priv(netdev);

        /* trigger update on any VLAN feature change */
        if ((netdev->features & NETIF_VLAN_OFFLOAD_FEATURES) ^
            (features & NETIF_VLAN_OFFLOAD_FEATURES))
                iavf_set_vlan_offload_features(adapter, netdev->features,
                                               features);
        if (CRC_OFFLOAD_ALLOWED(adapter) &&
            ((netdev->features & NETIF_F_RXFCS) ^ (features & NETIF_F_RXFCS)))
                iavf_schedule_reset(adapter, IAVF_FLAG_RESET_NEEDED);

        if ((netdev->features & NETIF_F_NTUPLE) ^ (features & NETIF_F_NTUPLE)) {
                if (features & NETIF_F_NTUPLE)
                        adapter->flags |= IAVF_FLAG_FDIR_ENABLED;
                else
                        iavf_disable_fdir(adapter);
        }

        return 0;
}

/**
 * iavf_features_check - Validate encapsulated packet conforms to limits
 * @skb: skb buff
 * @dev: This physical port's netdev
 * @features: Offload features that the stack believes apply
 **/
static netdev_features_t iavf_features_check(struct sk_buff *skb,
                                             struct net_device *dev,
                                             netdev_features_t features)
{
        size_t len;

        /* No point in doing any of this if neither checksum nor GSO are
         * being requested for this frame.  We can rule out both by just
         * checking for CHECKSUM_PARTIAL
         */
        if (skb->ip_summed != CHECKSUM_PARTIAL)
                return features;

        /* We cannot support GSO if the MSS is going to be less than
         * 64 bytes.  If it is then we need to drop support for GSO.
         */
        if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_size < 64))
                features &= ~NETIF_F_GSO_MASK;

        /* MACLEN can support at most 63 words */
        len = skb_network_offset(skb);
        if (len & ~(63 * 2))
                goto out_err;

        /* IPLEN and EIPLEN can support at most 127 dwords */
        len = skb_network_header_len(skb);
        if (len & ~(127 * 4))
                goto out_err;

        if (skb->encapsulation) {
                /* L4TUNLEN can support 127 words */
                len = skb_inner_network_header(skb) - skb_transport_header(skb);
                if (len & ~(127 * 2))
                        goto out_err;

                /* IPLEN can support at most 127 dwords */
                len = skb_inner_transport_header(skb) -
                      skb_inner_network_header(skb);
                if (len & ~(127 * 4))
                        goto out_err;
        }

        /* No need to validate L4LEN as TCP is the only protocol with a
         * flexible value and we support all possible values supported
         * by TCP, which is at most 15 dwords
         */

        return features;
out_err:
        return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
}

/**
 * iavf_get_netdev_vlan_hw_features - get NETDEV VLAN features that can toggle on/off
 * @adapter: board private structure
 *
 * Depending on whether VIRTHCNL_VF_OFFLOAD_VLAN or VIRTCHNL_VF_OFFLOAD_VLAN_V2
 * were negotiated determine the VLAN features that can be toggled on and off.
 **/
static netdev_features_t
iavf_get_netdev_vlan_hw_features(struct iavf_adapter *adapter)
{
        netdev_features_t hw_features = 0;

        if (!adapter->vf_res || !adapter->vf_res->vf_cap_flags)
                return hw_features;

        /* Enable VLAN features if supported */
        if (VLAN_ALLOWED(adapter)) {
                hw_features |= (NETIF_F_HW_VLAN_CTAG_TX |
                                NETIF_F_HW_VLAN_CTAG_RX);
        } else if (VLAN_V2_ALLOWED(adapter)) {
                struct virtchnl_vlan_caps *vlan_v2_caps =
                        &adapter->vlan_v2_caps;
                struct virtchnl_vlan_supported_caps *stripping_support =
                        &vlan_v2_caps->offloads.stripping_support;
                struct virtchnl_vlan_supported_caps *insertion_support =
                        &vlan_v2_caps->offloads.insertion_support;

                if (stripping_support->outer != VIRTCHNL_VLAN_UNSUPPORTED &&
                    stripping_support->outer & VIRTCHNL_VLAN_TOGGLE) {
                        if (stripping_support->outer &
                            VIRTCHNL_VLAN_ETHERTYPE_8100)
                                hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
                        if (stripping_support->outer &
                            VIRTCHNL_VLAN_ETHERTYPE_88A8)
                                hw_features |= NETIF_F_HW_VLAN_STAG_RX;
                } else if (stripping_support->inner !=
                           VIRTCHNL_VLAN_UNSUPPORTED &&
                           stripping_support->inner & VIRTCHNL_VLAN_TOGGLE) {
                        if (stripping_support->inner &
                            VIRTCHNL_VLAN_ETHERTYPE_8100)
                                hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
                }

                if (insertion_support->outer != VIRTCHNL_VLAN_UNSUPPORTED &&
                    insertion_support->outer & VIRTCHNL_VLAN_TOGGLE) {
                        if (insertion_support->outer &
                            VIRTCHNL_VLAN_ETHERTYPE_8100)
                                hw_features |= NETIF_F_HW_VLAN_CTAG_TX;
                        if (insertion_support->outer &
                            VIRTCHNL_VLAN_ETHERTYPE_88A8)
                                hw_features |= NETIF_F_HW_VLAN_STAG_TX;
                } else if (insertion_support->inner &&
                           insertion_support->inner & VIRTCHNL_VLAN_TOGGLE) {
                        if (insertion_support->inner &
                            VIRTCHNL_VLAN_ETHERTYPE_8100)
                                hw_features |= NETIF_F_HW_VLAN_CTAG_TX;
                }
        }

        if (CRC_OFFLOAD_ALLOWED(adapter))
                hw_features |= NETIF_F_RXFCS;

        return hw_features;
}

/**
 * iavf_get_netdev_vlan_features - get the enabled NETDEV VLAN fetures
 * @adapter: board private structure
 *
 * Depending on whether VIRTHCNL_VF_OFFLOAD_VLAN or VIRTCHNL_VF_OFFLOAD_VLAN_V2
 * were negotiated determine the VLAN features that are enabled by default.
 **/
static netdev_features_t
iavf_get_netdev_vlan_features(struct iavf_adapter *adapter)
{
        netdev_features_t features = 0;

        if (!adapter->vf_res || !adapter->vf_res->vf_cap_flags)
                return features;

        if (VLAN_ALLOWED(adapter)) {
                features |= NETIF_F_HW_VLAN_CTAG_FILTER |
                        NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_TX;
        } else if (VLAN_V2_ALLOWED(adapter)) {
                struct virtchnl_vlan_caps *vlan_v2_caps =
                        &adapter->vlan_v2_caps;
                struct virtchnl_vlan_supported_caps *filtering_support =
                        &vlan_v2_caps->filtering.filtering_support;
                struct virtchnl_vlan_supported_caps *stripping_support =
                        &vlan_v2_caps->offloads.stripping_support;
                struct virtchnl_vlan_supported_caps *insertion_support =
                        &vlan_v2_caps->offloads.insertion_support;
                u32 ethertype_init;

                /* give priority to outer stripping and don't support both outer
                 * and inner stripping
                 */
                ethertype_init = vlan_v2_caps->offloads.ethertype_init;
                if (stripping_support->outer != VIRTCHNL_VLAN_UNSUPPORTED) {
                        if (stripping_support->outer &
                            VIRTCHNL_VLAN_ETHERTYPE_8100 &&
                            ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_8100)
                                features |= NETIF_F_HW_VLAN_CTAG_RX;
                        else if (stripping_support->outer &
                                 VIRTCHNL_VLAN_ETHERTYPE_88A8 &&
                                 ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_88A8)
                                features |= NETIF_F_HW_VLAN_STAG_RX;
                } else if (stripping_support->inner !=
                           VIRTCHNL_VLAN_UNSUPPORTED) {
                        if (stripping_support->inner &
                            VIRTCHNL_VLAN_ETHERTYPE_8100 &&
                            ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_8100)
                                features |= NETIF_F_HW_VLAN_CTAG_RX;
                }

                /* give priority to outer insertion and don't support both outer
                 * and inner insertion
                 */
                if (insertion_support->outer != VIRTCHNL_VLAN_UNSUPPORTED) {
                        if (insertion_support->outer &
                            VIRTCHNL_VLAN_ETHERTYPE_8100 &&
                            ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_8100)
                                features |= NETIF_F_HW_VLAN_CTAG_TX;
                        else if (insertion_support->outer &
                                 VIRTCHNL_VLAN_ETHERTYPE_88A8 &&
                                 ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_88A8)
                                features |= NETIF_F_HW_VLAN_STAG_TX;
                } else if (insertion_support->inner !=
                           VIRTCHNL_VLAN_UNSUPPORTED) {
                        if (insertion_support->inner &
                            VIRTCHNL_VLAN_ETHERTYPE_8100 &&
                            ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_8100)
                                features |= NETIF_F_HW_VLAN_CTAG_TX;
                }

                /* give priority to outer filtering and don't bother if both
                 * outer and inner filtering are enabled
                 */
                ethertype_init = vlan_v2_caps->filtering.ethertype_init;
                if (filtering_support->outer != VIRTCHNL_VLAN_UNSUPPORTED) {
                        if (filtering_support->outer &
                            VIRTCHNL_VLAN_ETHERTYPE_8100 &&
                            ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_8100)
                                features |= NETIF_F_HW_VLAN_CTAG_FILTER;
                        if (filtering_support->outer &
                            VIRTCHNL_VLAN_ETHERTYPE_88A8 &&
                            ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_88A8)
                                features |= NETIF_F_HW_VLAN_STAG_FILTER;
                } else if (filtering_support->inner !=
                           VIRTCHNL_VLAN_UNSUPPORTED) {
                        if (filtering_support->inner &
                            VIRTCHNL_VLAN_ETHERTYPE_8100 &&
                            ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_8100)
                                features |= NETIF_F_HW_VLAN_CTAG_FILTER;
                        if (filtering_support->inner &
                            VIRTCHNL_VLAN_ETHERTYPE_88A8 &&
                            ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_88A8)
                                features |= NETIF_F_HW_VLAN_STAG_FILTER;
                }
        }

        return features;
}

#define IAVF_NETDEV_VLAN_FEATURE_ALLOWED(requested, allowed, feature_bit) \
        (!(((requested) & (feature_bit)) && \
           !((allowed) & (feature_bit))))

/**
 * iavf_fix_netdev_vlan_features - fix NETDEV VLAN features based on support
 * @adapter: board private structure
 * @requested_features: stack requested NETDEV features
 **/
static netdev_features_t
iavf_fix_netdev_vlan_features(struct iavf_adapter *adapter,
                              netdev_features_t requested_features)
{
        netdev_features_t allowed_features;

        allowed_features = iavf_get_netdev_vlan_hw_features(adapter) |
                iavf_get_netdev_vlan_features(adapter);

        if (!IAVF_NETDEV_VLAN_FEATURE_ALLOWED(requested_features,
                                              allowed_features,
                                              NETIF_F_HW_VLAN_CTAG_TX))
                requested_features &= ~NETIF_F_HW_VLAN_CTAG_TX;

        if (!IAVF_NETDEV_VLAN_FEATURE_ALLOWED(requested_features,
                                              allowed_features,
                                              NETIF_F_HW_VLAN_CTAG_RX))
                requested_features &= ~NETIF_F_HW_VLAN_CTAG_RX;

        if (!IAVF_NETDEV_VLAN_FEATURE_ALLOWED(requested_features,
                                              allowed_features,
                                              NETIF_F_HW_VLAN_STAG_TX))
                requested_features &= ~NETIF_F_HW_VLAN_STAG_TX;
        if (!IAVF_NETDEV_VLAN_FEATURE_ALLOWED(requested_features,
                                              allowed_features,
                                              NETIF_F_HW_VLAN_STAG_RX))
                requested_features &= ~NETIF_F_HW_VLAN_STAG_RX;

        if (!IAVF_NETDEV_VLAN_FEATURE_ALLOWED(requested_features,
                                              allowed_features,
                                              NETIF_F_HW_VLAN_CTAG_FILTER))
                requested_features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;

        if (!IAVF_NETDEV_VLAN_FEATURE_ALLOWED(requested_features,
                                              allowed_features,
                                              NETIF_F_HW_VLAN_STAG_FILTER))
                requested_features &= ~NETIF_F_HW_VLAN_STAG_FILTER;

        if ((requested_features &
             (NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_TX)) &&
            (requested_features &
             (NETIF_F_HW_VLAN_STAG_RX | NETIF_F_HW_VLAN_STAG_TX)) &&
            adapter->vlan_v2_caps.offloads.ethertype_match ==
            VIRTCHNL_ETHERTYPE_STRIPPING_MATCHES_INSERTION) {
                netdev_warn(adapter->netdev, "cannot support CTAG and STAG VLAN stripping and/or insertion simultaneously since CTAG and STAG offloads are mutually exclusive, clearing STAG offload settings\n");
                requested_features &= ~(NETIF_F_HW_VLAN_STAG_RX |
                                        NETIF_F_HW_VLAN_STAG_TX);
        }

        return requested_features;
}

/**
 * iavf_fix_strip_features - fix NETDEV CRC and VLAN strip features
 * @adapter: board private structure
 * @requested_features: stack requested NETDEV features
 *
 * Returns fixed-up features bits
 **/
static netdev_features_t
iavf_fix_strip_features(struct iavf_adapter *adapter,
                        netdev_features_t requested_features)
{
        struct net_device *netdev = adapter->netdev;
        bool crc_offload_req, is_vlan_strip;
        netdev_features_t vlan_strip;
        int num_non_zero_vlan;

        crc_offload_req = CRC_OFFLOAD_ALLOWED(adapter) &&
                          (requested_features & NETIF_F_RXFCS);
        num_non_zero_vlan = iavf_get_num_vlans_added(adapter);
        vlan_strip = (NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_STAG_RX);
        is_vlan_strip = requested_features & vlan_strip;

        if (!crc_offload_req)
                return requested_features;

        if (!num_non_zero_vlan && (netdev->features & vlan_strip) &&
            !(netdev->features & NETIF_F_RXFCS) && is_vlan_strip) {
                requested_features &= ~vlan_strip;
                netdev_info(netdev, "Disabling VLAN stripping as FCS/CRC stripping is also disabled and there is no VLAN configured\n");
                return requested_features;
        }

        if ((netdev->features & NETIF_F_RXFCS) && is_vlan_strip) {
                requested_features &= ~vlan_strip;
                if (!(netdev->features & vlan_strip))
                        netdev_info(netdev, "To enable VLAN stripping, first need to enable FCS/CRC stripping");

                return requested_features;
        }

        if (num_non_zero_vlan && is_vlan_strip &&
            !(netdev->features & NETIF_F_RXFCS)) {
                requested_features &= ~NETIF_F_RXFCS;
                netdev_info(netdev, "To disable FCS/CRC stripping, first need to disable VLAN stripping");
        }

        return requested_features;
}

/**
 * iavf_fix_features - fix up the netdev feature bits
 * @netdev: our net device
 * @features: desired feature bits
 *
 * Returns fixed-up features bits
 **/
static netdev_features_t iavf_fix_features(struct net_device *netdev,
                                           netdev_features_t features)
{
        struct iavf_adapter *adapter = netdev_priv(netdev);

        features = iavf_fix_netdev_vlan_features(adapter, features);

        if (!FDIR_FLTR_SUPPORT(adapter))
                features &= ~NETIF_F_NTUPLE;

        return iavf_fix_strip_features(adapter, features);
}

static int iavf_hwstamp_get(struct net_device *netdev,
                            struct kernel_hwtstamp_config *config)
{
        struct iavf_adapter *adapter = netdev_priv(netdev);

        *config = adapter->ptp.hwtstamp_config;

        return 0;
}

static int iavf_hwstamp_set(struct net_device *netdev,
                            struct kernel_hwtstamp_config *config,
                            struct netlink_ext_ack *extack)
{
        struct iavf_adapter *adapter = netdev_priv(netdev);

        return iavf_ptp_set_ts_config(adapter, config, extack);
}

static int
iavf_verify_shaper(struct net_shaper_binding *binding,
                   const struct net_shaper *shaper,
                   struct netlink_ext_ack *extack)
{
        struct iavf_adapter *adapter = netdev_priv(binding->netdev);
        u64 vf_max;

        if (shaper->handle.scope == NET_SHAPER_SCOPE_QUEUE) {
                vf_max = adapter->qos_caps->cap[0].shaper.peak;
                if (vf_max && shaper->bw_max > vf_max) {
                        NL_SET_ERR_MSG_FMT(extack, "Max rate (%llu) of queue %d can't exceed max TX rate of VF (%llu kbps)",
                                           shaper->bw_max, shaper->handle.id,
                                           vf_max);
                        return -EINVAL;
                }
        }
        return 0;
}

static int
iavf_shaper_set(struct net_shaper_binding *binding,
                const struct net_shaper *shaper,
                struct netlink_ext_ack *extack)
{
        struct iavf_adapter *adapter = netdev_priv(binding->netdev);
        const struct net_shaper_handle *handle = &shaper->handle;
        struct iavf_ring *tx_ring;
        int ret;

        netdev_assert_locked(adapter->netdev);

        if (handle->id >= adapter->num_active_queues)
                return 0;

        ret = iavf_verify_shaper(binding, shaper, extack);
        if (ret)
                return ret;

        tx_ring = &adapter->tx_rings[handle->id];

        tx_ring->q_shaper.bw_min = div_u64(shaper->bw_min, 1000);
        tx_ring->q_shaper.bw_max = div_u64(shaper->bw_max, 1000);
        tx_ring->q_shaper_update = true;

        adapter->aq_required |= IAVF_FLAG_AQ_CONFIGURE_QUEUES_BW;

        return 0;
}

static int iavf_shaper_del(struct net_shaper_binding *binding,
                           const struct net_shaper_handle *handle,
                           struct netlink_ext_ack *extack)
{
        struct iavf_adapter *adapter = netdev_priv(binding->netdev);
        struct iavf_ring *tx_ring;

        netdev_assert_locked(adapter->netdev);

        if (handle->id >= adapter->num_active_queues)
                return 0;

        tx_ring = &adapter->tx_rings[handle->id];
        tx_ring->q_shaper.bw_min = 0;
        tx_ring->q_shaper.bw_max = 0;
        tx_ring->q_shaper_update = true;

        adapter->aq_required |= IAVF_FLAG_AQ_CONFIGURE_QUEUES_BW;

        return 0;
}

static void iavf_shaper_cap(struct net_shaper_binding *binding,
                            enum net_shaper_scope scope,
                            unsigned long *flags)
{
        if (scope != NET_SHAPER_SCOPE_QUEUE)
                return;

        *flags = BIT(NET_SHAPER_A_CAPS_SUPPORT_BW_MIN) |
                 BIT(NET_SHAPER_A_CAPS_SUPPORT_BW_MAX) |
                 BIT(NET_SHAPER_A_CAPS_SUPPORT_METRIC_BPS);
}

static const struct net_shaper_ops iavf_shaper_ops = {
        .set = iavf_shaper_set,
        .delete = iavf_shaper_del,
        .capabilities = iavf_shaper_cap,
};

static const struct net_device_ops iavf_netdev_ops = {
        .ndo_open               = iavf_open,
        .ndo_stop               = iavf_close,
        .ndo_start_xmit         = iavf_xmit_frame,
        .ndo_set_rx_mode        = iavf_set_rx_mode,
        .ndo_validate_addr      = eth_validate_addr,
        .ndo_set_mac_address    = iavf_set_mac,
        .ndo_change_mtu         = iavf_change_mtu,
        .ndo_tx_timeout         = iavf_tx_timeout,
        .ndo_vlan_rx_add_vid    = iavf_vlan_rx_add_vid,
        .ndo_vlan_rx_kill_vid   = iavf_vlan_rx_kill_vid,
        .ndo_features_check     = iavf_features_check,
        .ndo_fix_features       = iavf_fix_features,
        .ndo_set_features       = iavf_set_features,
        .ndo_setup_tc           = iavf_setup_tc,
        .net_shaper_ops         = &iavf_shaper_ops,
        .ndo_hwtstamp_get       = iavf_hwstamp_get,
        .ndo_hwtstamp_set       = iavf_hwstamp_set,
};

/**
 * iavf_check_reset_complete - check that VF reset is complete
 * @hw: pointer to hw struct
 *
 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
 **/
static int iavf_check_reset_complete(struct iavf_hw *hw)
{
        u32 rstat;
        int i;

        for (i = 0; i < IAVF_RESET_WAIT_COMPLETE_COUNT; i++) {
                rstat = rd32(hw, IAVF_VFGEN_RSTAT) &
                             IAVF_VFGEN_RSTAT_VFR_STATE_MASK;
                if ((rstat == VIRTCHNL_VFR_VFACTIVE) ||
                    (rstat == VIRTCHNL_VFR_COMPLETED))
                        return 0;
                msleep(IAVF_RESET_WAIT_MS);
        }
        return -EBUSY;
}

/**
 * iavf_process_config - Process the config information we got from the PF
 * @adapter: board private structure
 *
 * Verify that we have a valid config struct, and set up our netdev features
 * and our VSI struct.
 **/
int iavf_process_config(struct iavf_adapter *adapter)
{
        struct virtchnl_vf_resource *vfres = adapter->vf_res;
        netdev_features_t hw_vlan_features, vlan_features;
        struct net_device *netdev = adapter->netdev;
        netdev_features_t hw_enc_features;
        netdev_features_t hw_features;

        hw_enc_features = NETIF_F_SG                    |
                          NETIF_F_IP_CSUM               |
                          NETIF_F_IPV6_CSUM             |
                          NETIF_F_HIGHDMA               |
                          NETIF_F_SOFT_FEATURES |
                          NETIF_F_TSO                   |
                          NETIF_F_TSO_ECN               |
                          NETIF_F_TSO6                  |
                          NETIF_F_SCTP_CRC              |
                          NETIF_F_RXHASH                |
                          NETIF_F_RXCSUM                |
                          0;

        /* advertise to stack only if offloads for encapsulated packets is
         * supported
         */
        if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ENCAP) {
                hw_enc_features |= NETIF_F_GSO_UDP_TUNNEL       |
                                   NETIF_F_GSO_GRE              |
                                   NETIF_F_GSO_GRE_CSUM         |
                                   NETIF_F_GSO_IPXIP4           |
                                   NETIF_F_GSO_IPXIP6           |
                                   NETIF_F_GSO_UDP_TUNNEL_CSUM  |
                                   NETIF_F_GSO_PARTIAL          |
                                   0;

                if (!(vfres->vf_cap_flags &
                      VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM))
                        netdev->gso_partial_features |=
                                NETIF_F_GSO_UDP_TUNNEL_CSUM;

                netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
                netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
                netdev->hw_enc_features |= hw_enc_features;
        }
        /* record features VLANs can make use of */
        netdev->vlan_features |= hw_enc_features | NETIF_F_TSO_MANGLEID;

        /* Write features and hw_features separately to avoid polluting
         * with, or dropping, features that are set when we registered.
         */
        hw_features = hw_enc_features;

        /* get HW VLAN features that can be toggled */
        hw_vlan_features = iavf_get_netdev_vlan_hw_features(adapter);

        /* Enable HW TC offload if ADQ or tc U32 is supported */
        if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ ||
            TC_U32_SUPPORT(adapter))
                hw_features |= NETIF_F_HW_TC;

        if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_USO)
                hw_features |= NETIF_F_GSO_UDP_L4;

        netdev->hw_features |= hw_features | hw_vlan_features;
        vlan_features = iavf_get_netdev_vlan_features(adapter);

        netdev->features |= hw_features | vlan_features;

        if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_VLAN)
                netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;

        if (FDIR_FLTR_SUPPORT(adapter)) {
                netdev->hw_features |= NETIF_F_NTUPLE;
                netdev->features |= NETIF_F_NTUPLE;
                adapter->flags |= IAVF_FLAG_FDIR_ENABLED;
        }

        netdev->priv_flags |= IFF_UNICAST_FLT;

        /* Do not turn on offloads when they are requested to be turned off.
         * TSO needs minimum 576 bytes to work correctly.
         */
        if (netdev->wanted_features) {
                if (!(netdev->wanted_features & NETIF_F_TSO) ||
                    netdev->mtu < 576)
                        netdev->features &= ~NETIF_F_TSO;
                if (!(netdev->wanted_features & NETIF_F_TSO6) ||
                    netdev->mtu < 576)
                        netdev->features &= ~NETIF_F_TSO6;
                if (!(netdev->wanted_features & NETIF_F_TSO_ECN))
                        netdev->features &= ~NETIF_F_TSO_ECN;
                if (!(netdev->wanted_features & NETIF_F_GRO))
                        netdev->features &= ~NETIF_F_GRO;
                if (!(netdev->wanted_features & NETIF_F_GSO))
                        netdev->features &= ~NETIF_F_GSO;
        }

        return 0;
}

/**
 * iavf_probe - Device Initialization Routine
 * @pdev: PCI device information struct
 * @ent: entry in iavf_pci_tbl
 *
 * Returns 0 on success, negative on failure
 *
 * iavf_probe initializes an adapter identified by a pci_dev structure.
 * The OS initialization, configuring of the adapter private structure,
 * and a hardware reset occur.
 **/
static int iavf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
        struct net_device *netdev;
        struct iavf_adapter *adapter = NULL;
        struct iavf_hw *hw = NULL;
        int err, len;

        err = pci_enable_device(pdev);
        if (err)
                return err;

        err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
        if (err) {
                dev_err(&pdev->dev,
                        "DMA configuration failed: 0x%x\n", err);
                goto err_dma;
        }

        err = pci_request_regions(pdev, iavf_driver_name);
        if (err) {
                dev_err(&pdev->dev,
                        "pci_request_regions failed 0x%x\n", err);
                goto err_pci_reg;
        }

        pci_set_master(pdev);

        netdev = alloc_etherdev_mq(sizeof(struct iavf_adapter),
                                   IAVF_MAX_REQ_QUEUES);
        if (!netdev) {
                err = -ENOMEM;
                goto err_alloc_etherdev;
        }

        netif_set_affinity_auto(netdev);
        SET_NETDEV_DEV(netdev, &pdev->dev);

        pci_set_drvdata(pdev, netdev);
        adapter = netdev_priv(netdev);

        adapter->netdev = netdev;
        adapter->pdev = pdev;

        hw = &adapter->hw;
        hw->back = adapter;

        adapter->wq = alloc_ordered_workqueue("%s", WQ_MEM_RECLAIM,
                                              iavf_driver_name);
        if (!adapter->wq) {
                err = -ENOMEM;
                goto err_alloc_wq;
        }

        adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
        iavf_change_state(adapter, __IAVF_STARTUP);

        /* Call save state here because it relies on the adapter struct. */
        pci_save_state(pdev);

        hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
                              pci_resource_len(pdev, 0));
        if (!hw->hw_addr) {
                err = -EIO;
                goto err_ioremap;
        }
        hw->vendor_id = pdev->vendor;
        hw->device_id = pdev->device;
        pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
        hw->subsystem_vendor_id = pdev->subsystem_vendor;
        hw->subsystem_device_id = pdev->subsystem_device;
        hw->bus.device = PCI_SLOT(pdev->devfn);
        hw->bus.func = PCI_FUNC(pdev->devfn);
        hw->bus.bus_id = pdev->bus->number;

        len = struct_size(adapter->qos_caps, cap, IAVF_MAX_QOS_TC_NUM);
        adapter->qos_caps = kzalloc(len, GFP_KERNEL);
        if (!adapter->qos_caps) {
                err = -ENOMEM;
                goto err_alloc_qos_cap;
        }

        mutex_init(&hw->aq.asq_mutex);
        mutex_init(&hw->aq.arq_mutex);

        spin_lock_init(&adapter->mac_vlan_list_lock);
        spin_lock_init(&adapter->cloud_filter_list_lock);
        spin_lock_init(&adapter->fdir_fltr_lock);
        spin_lock_init(&adapter->adv_rss_lock);
        spin_lock_init(&adapter->current_netdev_promisc_flags_lock);

        INIT_LIST_HEAD(&adapter->mac_filter_list);
        INIT_LIST_HEAD(&adapter->vlan_filter_list);
        INIT_LIST_HEAD(&adapter->cloud_filter_list);
        INIT_LIST_HEAD(&adapter->fdir_list_head);
        INIT_LIST_HEAD(&adapter->adv_rss_list_head);

        INIT_WORK(&adapter->reset_task, iavf_reset_task);
        INIT_WORK(&adapter->adminq_task, iavf_adminq_task);
        INIT_WORK(&adapter->finish_config, iavf_finish_config);
        INIT_DELAYED_WORK(&adapter->watchdog_task, iavf_watchdog_task);

        /* Setup the wait queue for indicating transition to down status */
        init_waitqueue_head(&adapter->down_waitqueue);

        /* Setup the wait queue for indicating virtchannel events */
        init_waitqueue_head(&adapter->vc_waitqueue);

        INIT_LIST_HEAD(&adapter->ptp.aq_cmds);
        init_waitqueue_head(&adapter->ptp.phc_time_waitqueue);
        mutex_init(&adapter->ptp.aq_cmd_lock);

        queue_delayed_work(adapter->wq, &adapter->watchdog_task,
                           msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
        /* Initialization goes on in the work. Do not add more of it below. */
        return 0;

err_alloc_qos_cap:
        iounmap(hw->hw_addr);
err_ioremap:
        destroy_workqueue(adapter->wq);
err_alloc_wq:
        free_netdev(netdev);
err_alloc_etherdev:
        pci_release_regions(pdev);
err_pci_reg:
err_dma:
        pci_disable_device(pdev);
        return err;
}

/**
 * iavf_suspend - Power management suspend routine
 * @dev_d: device info pointer
 *
 * Called when the system (VM) is entering sleep/suspend.
 **/
static int iavf_suspend(struct device *dev_d)
{
        struct net_device *netdev = dev_get_drvdata(dev_d);
        struct iavf_adapter *adapter = netdev_priv(netdev);
        bool running;

        netif_device_detach(netdev);

        running = netif_running(netdev);
        if (running)
                rtnl_lock();
        netdev_lock(netdev);

        if (running)
                iavf_down(adapter);

        iavf_free_misc_irq(adapter);
        iavf_reset_interrupt_capability(adapter);

        netdev_unlock(netdev);
        if (running)
                rtnl_unlock();

        return 0;
}

/**
 * iavf_resume - Power management resume routine
 * @dev_d: device info pointer
 *
 * Called when the system (VM) is resumed from sleep/suspend.
 **/
static int iavf_resume(struct device *dev_d)
{
        struct pci_dev *pdev = to_pci_dev(dev_d);
        struct iavf_adapter *adapter;
        int err;

        adapter = iavf_pdev_to_adapter(pdev);

        pci_set_master(pdev);

        rtnl_lock();
        err = iavf_set_interrupt_capability(adapter);
        if (err) {
                rtnl_unlock();
                dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
                return err;
        }
        err = iavf_request_misc_irq(adapter);
        rtnl_unlock();
        if (err) {
                dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
                return err;
        }

        queue_work(adapter->wq, &adapter->reset_task);

        netif_device_attach(adapter->netdev);

        return err;
}

/**
 * iavf_remove - Device Removal Routine
 * @pdev: PCI device information struct
 *
 * iavf_remove is called by the PCI subsystem to alert the driver
 * that it should release a PCI device.  The could be caused by a
 * Hot-Plug event, or because the driver is going to be removed from
 * memory.
 **/
static void iavf_remove(struct pci_dev *pdev)
{
        struct iavf_fdir_fltr *fdir, *fdirtmp;
        struct iavf_vlan_filter *vlf, *vlftmp;
        struct iavf_cloud_filter *cf, *cftmp;
        struct iavf_adv_rss *rss, *rsstmp;
        struct iavf_mac_filter *f, *ftmp;
        struct iavf_adapter *adapter;
        struct net_device *netdev;
        struct iavf_hw *hw;

        /* Don't proceed with remove if netdev is already freed */
        netdev = pci_get_drvdata(pdev);
        if (!netdev)
                return;

        adapter = iavf_pdev_to_adapter(pdev);
        hw = &adapter->hw;

        if (test_and_set_bit(__IAVF_IN_REMOVE_TASK, &adapter->crit_section))
                return;

        /* Wait until port initialization is complete.
         * There are flows where register/unregister netdev may race.
         */
        while (1) {
                netdev_lock(netdev);
                if (adapter->state == __IAVF_RUNNING ||
                    adapter->state == __IAVF_DOWN ||
                    adapter->state == __IAVF_INIT_FAILED) {
                        netdev_unlock(netdev);
                        break;
                }
                /* Simply return if we already went through iavf_shutdown */
                if (adapter->state == __IAVF_REMOVE) {
                        netdev_unlock(netdev);
                        return;
                }

                netdev_unlock(netdev);
                usleep_range(500, 1000);
        }
        cancel_delayed_work_sync(&adapter->watchdog_task);
        cancel_work_sync(&adapter->finish_config);

        if (netdev->reg_state == NETREG_REGISTERED)
                unregister_netdev(netdev);

        netdev_lock(netdev);
        dev_info(&adapter->pdev->dev, "Removing device\n");
        iavf_change_state(adapter, __IAVF_REMOVE);

        iavf_request_reset(adapter);
        msleep(50);
        /* If the FW isn't responding, kick it once, but only once. */
        if (!iavf_asq_done(hw)) {
                iavf_request_reset(adapter);
                msleep(50);
        }

        iavf_ptp_release(adapter);

        iavf_misc_irq_disable(adapter);
        /* Shut down all the garbage mashers on the detention level */
        netdev_unlock(netdev);
        cancel_work_sync(&adapter->reset_task);
        cancel_delayed_work_sync(&adapter->watchdog_task);
        cancel_work_sync(&adapter->adminq_task);
        netdev_lock(netdev);

        adapter->aq_required = 0;
        adapter->flags &= ~IAVF_FLAG_REINIT_ITR_NEEDED;

        iavf_free_all_tx_resources(adapter);
        iavf_free_all_rx_resources(adapter);
        iavf_free_misc_irq(adapter);
        iavf_free_interrupt_scheme(adapter);

        iavf_free_rss(adapter);

        if (hw->aq.asq.count)
                iavf_shutdown_adminq(hw);

        /* destroy the locks only once, here */
        mutex_destroy(&hw->aq.arq_mutex);
        mutex_destroy(&hw->aq.asq_mutex);
        netdev_unlock(netdev);

        iounmap(hw->hw_addr);
        pci_release_regions(pdev);
        kfree(adapter->vf_res);
        spin_lock_bh(&adapter->mac_vlan_list_lock);
        /* If we got removed before an up/down sequence, we've got a filter
         * hanging out there that we need to get rid of.
         */
        list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
                list_del(&f->list);
                kfree(f);
        }
        list_for_each_entry_safe(vlf, vlftmp, &adapter->vlan_filter_list,
                                 list) {
                list_del(&vlf->list);
                kfree(vlf);
        }

        spin_unlock_bh(&adapter->mac_vlan_list_lock);

        spin_lock_bh(&adapter->cloud_filter_list_lock);
        list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list, list) {
                list_del(&cf->list);
                kfree(cf);
        }
        spin_unlock_bh(&adapter->cloud_filter_list_lock);

        spin_lock_bh(&adapter->fdir_fltr_lock);
        list_for_each_entry_safe(fdir, fdirtmp, &adapter->fdir_list_head, list) {
                list_del(&fdir->list);
                kfree(fdir);
        }
        spin_unlock_bh(&adapter->fdir_fltr_lock);

        spin_lock_bh(&adapter->adv_rss_lock);
        list_for_each_entry_safe(rss, rsstmp, &adapter->adv_rss_list_head,
                                 list) {
                list_del(&rss->list);
                kfree(rss);
        }
        spin_unlock_bh(&adapter->adv_rss_lock);

        destroy_workqueue(adapter->wq);

        pci_set_drvdata(pdev, NULL);

        free_netdev(netdev);

        pci_disable_device(pdev);
}

/**
 * iavf_shutdown - Shutdown the device in preparation for a reboot
 * @pdev: pci device structure
 **/
static void iavf_shutdown(struct pci_dev *pdev)
{
        iavf_remove(pdev);

        if (system_state == SYSTEM_POWER_OFF)
                pci_set_power_state(pdev, PCI_D3hot);
}

static DEFINE_SIMPLE_DEV_PM_OPS(iavf_pm_ops, iavf_suspend, iavf_resume);

static struct pci_driver iavf_driver = {
        .name      = iavf_driver_name,
        .id_table  = iavf_pci_tbl,
        .probe     = iavf_probe,
        .remove    = iavf_remove,
        .driver.pm = pm_sleep_ptr(&iavf_pm_ops),
        .shutdown  = iavf_shutdown,
};

/**
 * iavf_init_module - Driver Registration Routine
 *
 * iavf_init_module is the first routine called when the driver is
 * loaded. All it does is register with the PCI subsystem.
 **/
static int __init iavf_init_module(void)
{
        pr_info("iavf: %s\n", iavf_driver_string);

        pr_info("%s\n", iavf_copyright);

        return pci_register_driver(&iavf_driver);
}

module_init(iavf_init_module);

/**
 * iavf_exit_module - Driver Exit Cleanup Routine
 *
 * iavf_exit_module is called just before the driver is removed
 * from memory.
 **/
static void __exit iavf_exit_module(void)
{
        pci_unregister_driver(&iavf_driver);
}

module_exit(iavf_exit_module);

/* iavf_main.c */
Linux
