Quelle  iavf_main.c   Sprache: 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_wait_for_reset - Wait for reset to finish.
 * @adapter: board private structure
 *
 * Returns 0 if reset finished successfully, negative on timeout or interrupt.
 */
int iavf_wait_for_reset(struct iavf_adapter *adapter)
{
 int ret = wait_event_interruptible_timeout(adapter->reset_waitqueue,
     !iavf_is_reset_in_progress(adapter),
     msecs_to_jiffies(5000));

 /* If ret < 0 then it means wait was interrupted.
 * If ret == 0 then it means we got a timeout while waiting
 * for reset to finish.
 * If ret > 0 it means reset has finished.
 */
 if (ret > 0)
  return 0;
 else if (ret < 0)
  return -EINTR;
 else
  return -EBUSY;
}

/**
 * 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(sizeof(*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) {
  /* IAVF_VLAN_REMOVE means that VLAN wasn't yet removed.
 * We can safely only change the state here.
 */
  f->state = IAVF_VLAN_ACTIVE;
 }

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(sizeof(*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 = kcalloc(num_active_queues,
        sizeof(struct iavf_ring), GFP_KERNEL);
 if (!adapter->tx_rings)
  goto err_out;
 adapter->rx_rings = kcalloc(num_active_queues,
        sizeof(struct iavf_ring), GFP_KERNEL);
 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 = kcalloc(v_budget,
     sizeof(struct msix_entry), GFP_KERNEL);
 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 = kcalloc(num_q_vectors, sizeof(*q_vector),
         GFP_KERNEL);
 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) {
--> --------------------

--> maximum size reached

--> --------------------