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linux_dsm_epyc7002/drivers/net/ethernet/intel/i40evf/i40evf_main.c
Alan Brady 47d2a5d827 i40evf: check for msix_entries null dereference 
It is possible for msix_entries to be freed by a previous suspend/remove
before a VF is closed.  This patch fixes the issue by checking for NULL
before dereferencing msix_entries and returning early in the case where
it is NULL within the i40evf_close code path.  Without this patch it is
possible to trigger a kernel panic through NULL dereference.

Change-ID: I92a2746e82533a889e25f91578eac9abd0388ae2
Signed-off-by: Alan Brady <alan.brady@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-12-02 23:10:41 -08:00

2965 lines
80 KiB
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/*******************************************************************************
*
* Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
* Copyright(c) 2013 - 2016 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* Contact Information:
* e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
******************************************************************************/
#include "i40evf.h"
#include "i40e_prototype.h"
static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
static int i40evf_close(struct net_device *netdev);
char i40evf_driver_name[] = "i40evf";
static const char i40evf_driver_string[] =
"Intel(R) 40-10 Gigabit Virtual Function Network Driver";
#define DRV_KERN "-k"
#define DRV_VERSION_MAJOR 1
#define DRV_VERSION_MINOR 6
#define DRV_VERSION_BUILD 21
#define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
__stringify(DRV_VERSION_MINOR) "." \
__stringify(DRV_VERSION_BUILD) \
DRV_KERN
const char i40evf_driver_version[] = DRV_VERSION;
static const char i40evf_copyright[] =
"Copyright (c) 2013 - 2015 Intel Corporation.";
/* i40evf_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 i40evf_pci_tbl[] = {
{PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
{PCI_VDEVICE(INTEL, I40E_DEV_ID_VF_HV), 0},
{PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF), 0},
{PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF_HV), 0},
/* required last entry */
{0, }
};
MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
static struct workqueue_struct *i40evf_wq;
/**
* i40evf_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
**/
i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
struct i40e_dma_mem *mem,
u64 size, u32 alignment)
{
struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
if (!mem)
return I40E_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 I40E_ERR_NO_MEMORY;
}
/**
* i40evf_free_dma_mem_d - OS specific memory free for shared code
* @hw: pointer to the HW structure
* @mem: ptr to mem struct to free
**/
i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
{
struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
if (!mem || !mem->va)
return I40E_ERR_PARAM;
dma_free_coherent(&adapter->pdev->dev, mem->size,
mem->va, (dma_addr_t)mem->pa);
return 0;
}
/**
* i40evf_allocate_virt_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
**/
i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
struct i40e_virt_mem *mem, u32 size)
{
if (!mem)
return I40E_ERR_PARAM;
mem->size = size;
mem->va = kzalloc(size, GFP_KERNEL);
if (mem->va)
return 0;
else
return I40E_ERR_NO_MEMORY;
}
/**
* i40evf_free_virt_mem_d - OS specific memory free for shared code
* @hw: pointer to the HW structure
* @mem: ptr to mem struct to free
**/
i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
struct i40e_virt_mem *mem)
{
if (!mem)
return I40E_ERR_PARAM;
/* it's ok to kfree a NULL pointer */
kfree(mem->va);
return 0;
}
/**
* i40evf_debug_d - OS dependent version of debug printing
* @hw: pointer to the HW structure
* @mask: debug level mask
* @fmt_str: printf-type format description
**/
void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
{
char buf[512];
va_list argptr;
if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
return;
va_start(argptr, fmt_str);
vsnprintf(buf, sizeof(buf), fmt_str, argptr);
va_end(argptr);
/* the debug string is already formatted with a newline */
pr_info("%s", buf);
}
/**
* i40evf_schedule_reset - Set the flags and schedule a reset event
* @adapter: board private structure
**/
void i40evf_schedule_reset(struct i40evf_adapter *adapter)
{
if (!(adapter->flags &
(I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED))) {
adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
schedule_work(&adapter->reset_task);
}
}
/**
* i40evf_tx_timeout - Respond to a Tx Hang
* @netdev: network interface device structure
**/
static void i40evf_tx_timeout(struct net_device *netdev)
{
struct i40evf_adapter *adapter = netdev_priv(netdev);
adapter->tx_timeout_count++;
i40evf_schedule_reset(adapter);
}
/**
* i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
* @adapter: board private structure
**/
static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
{
struct i40e_hw *hw = &adapter->hw;
wr32(hw, I40E_VFINT_DYN_CTL01, 0);
/* read flush */
rd32(hw, I40E_VFGEN_RSTAT);
synchronize_irq(adapter->msix_entries[0].vector);
}
/**
* i40evf_misc_irq_enable - Enable default interrupt generation settings
* @adapter: board private structure
**/
static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
{
struct i40e_hw *hw = &adapter->hw;
wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA1_ADMINQ_MASK);
/* read flush */
rd32(hw, I40E_VFGEN_RSTAT);
}
/**
* i40evf_irq_disable - Mask off interrupt generation on the NIC
* @adapter: board private structure
**/
static void i40evf_irq_disable(struct i40evf_adapter *adapter)
{
int i;
struct i40e_hw *hw = &adapter->hw;
if (!adapter->msix_entries)
return;
for (i = 1; i < adapter->num_msix_vectors; i++) {
wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
synchronize_irq(adapter->msix_entries[i].vector);
}
/* read flush */
rd32(hw, I40E_VFGEN_RSTAT);
}
/**
* i40evf_irq_enable_queues - Enable interrupt for specified queues
* @adapter: board private structure
* @mask: bitmap of queues to enable
**/
void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
{
struct i40e_hw *hw = &adapter->hw;
int i;
for (i = 1; i < adapter->num_msix_vectors; i++) {
if (mask & BIT(i - 1)) {
wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
I40E_VFINT_DYN_CTLN1_INTENA_MASK |
I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK);
}
}
}
/**
* i40evf_fire_sw_int - Generate SW interrupt for specified vectors
* @adapter: board private structure
* @mask: bitmap of vectors to trigger
**/
static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
{
struct i40e_hw *hw = &adapter->hw;
int i;
u32 dyn_ctl;
if (mask & 1) {
dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
}
for (i = 1; i < adapter->num_msix_vectors; i++) {
if (mask & BIT(i)) {
dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
}
}
}
/**
* i40evf_irq_enable - Enable default interrupt generation settings
* @adapter: board private structure
* @flush: boolean value whether to run rd32()
**/
void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
{
struct i40e_hw *hw = &adapter->hw;
i40evf_misc_irq_enable(adapter);
i40evf_irq_enable_queues(adapter, ~0);
if (flush)
rd32(hw, I40E_VFGEN_RSTAT);
}
/**
* i40evf_msix_aq - Interrupt handler for vector 0
* @irq: interrupt number
* @data: pointer to netdev
**/
static irqreturn_t i40evf_msix_aq(int irq, void *data)
{
struct net_device *netdev = data;
struct i40evf_adapter *adapter = netdev_priv(netdev);
struct i40e_hw *hw = &adapter->hw;
u32 val;
/* handle non-queue interrupts, these reads clear the registers */
val = rd32(hw, I40E_VFINT_ICR01);
val = rd32(hw, I40E_VFINT_ICR0_ENA1);
val = rd32(hw, I40E_VFINT_DYN_CTL01) |
I40E_VFINT_DYN_CTL01_CLEARPBA_MASK;
wr32(hw, I40E_VFINT_DYN_CTL01, val);
/* schedule work on the private workqueue */
schedule_work(&adapter->adminq_task);
return IRQ_HANDLED;
}
/**
* i40evf_msix_clean_rings - MSIX mode Interrupt Handler
* @irq: interrupt number
* @data: pointer to a q_vector
**/
static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
{
struct i40e_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;
}
/**
* i40evf_map_vector_to_rxq - associate irqs with rx queues
* @adapter: board private structure
* @v_idx: interrupt number
* @r_idx: queue number
**/
static void
i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
{
struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
struct i40e_ring *rx_ring = &adapter->rx_rings[r_idx];
struct i40e_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.latency_range = I40E_LOW_LATENCY;
q_vector->rx.itr = ITR_TO_REG(rx_ring->rx_itr_setting);
q_vector->ring_mask |= BIT(r_idx);
q_vector->itr_countdown = ITR_COUNTDOWN_START;
wr32(hw, I40E_VFINT_ITRN1(I40E_RX_ITR, v_idx - 1), q_vector->rx.itr);
}
/**
* i40evf_map_vector_to_txq - associate irqs with tx queues
* @adapter: board private structure
* @v_idx: interrupt number
* @t_idx: queue number
**/
static void
i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
{
struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
struct i40e_ring *tx_ring = &adapter->tx_rings[t_idx];
struct i40e_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.latency_range = I40E_LOW_LATENCY;
q_vector->tx.itr = ITR_TO_REG(tx_ring->tx_itr_setting);
q_vector->itr_countdown = ITR_COUNTDOWN_START;
q_vector->num_ringpairs++;
wr32(hw, I40E_VFINT_ITRN1(I40E_TX_ITR, v_idx - 1), q_vector->tx.itr);
}
/**
* i40evf_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 int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
{
int q_vectors;
int v_start = 0;
int rxr_idx = 0, txr_idx = 0;
int rxr_remaining = adapter->num_active_queues;
int txr_remaining = adapter->num_active_queues;
int i, j;
int rqpv, tqpv;
int err = 0;
q_vectors = adapter->num_msix_vectors - NONQ_VECS;
/* The ideal configuration...
* We have enough vectors to map one per queue.
*/
if (q_vectors >= (rxr_remaining * 2)) {
for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
for (; txr_idx < txr_remaining; v_start++, txr_idx++)
i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
goto out;
}
/* If we don't have enough vectors for a 1-to-1
* mapping, we'll have to group them so there are
* multiple queues per vector.
* Re-adjusting *qpv takes care of the remainder.
*/
for (i = v_start; i < q_vectors; i++) {
rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
for (j = 0; j < rqpv; j++) {
i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
rxr_idx++;
rxr_remaining--;
}
}
for (i = v_start; i < q_vectors; i++) {
tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
for (j = 0; j < tqpv; j++) {
i40evf_map_vector_to_txq(adapter, i, txr_idx);
txr_idx++;
txr_remaining--;
}
}
out:
adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
return err;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
/**
* i40evf_netpoll - A Polling 'interrupt' handler
* @netdev: network interface device structure
*
* This is used by netconsole to send skbs without having to re-enable
* interrupts. It's not called while the normal interrupt routine is executing.
**/
static void i40evf_netpoll(struct net_device *netdev)
{
struct i40evf_adapter *adapter = netdev_priv(netdev);
int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
int i;
/* if interface is down do nothing */
if (test_bit(__I40E_DOWN, &adapter->vsi.state))
return;
for (i = 0; i < q_vectors; i++)
i40evf_msix_clean_rings(0, &adapter->q_vectors[i]);
}
#endif
/**
* i40evf_irq_affinity_notify - Callback for affinity changes
* @notify: context as to what irq was changed
* @mask: the new affinity mask
*
* This is a callback function used by the irq_set_affinity_notifier function
* so that we may register to receive changes to the irq affinity masks.
**/
static void i40evf_irq_affinity_notify(struct irq_affinity_notify *notify,
const cpumask_t *mask)
{
struct i40e_q_vector *q_vector =
container_of(notify, struct i40e_q_vector, affinity_notify);
q_vector->affinity_mask = *mask;
}
/**
* i40evf_irq_affinity_release - Callback for affinity notifier release
* @ref: internal core kernel usage
*
* This is a callback function used by the irq_set_affinity_notifier function
* to inform the current notification subscriber that they will no longer
* receive notifications.
**/
static void i40evf_irq_affinity_release(struct kref *ref) {}
/**
* i40evf_request_traffic_irqs - Initialize MSI-X interrupts
* @adapter: board private structure
*
* Allocates MSI-X vectors for tx and rx handling, and requests
* interrupts from the kernel.
**/
static int
i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
{
int vector, err, q_vectors;
int rx_int_idx = 0, tx_int_idx = 0;
int irq_num;
i40evf_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 i40e_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) - 1,
"i40evf-%s-%s-%d", basename,
"TxRx", rx_int_idx++);
tx_int_idx++;
} else if (q_vector->rx.ring) {
snprintf(q_vector->name, sizeof(q_vector->name) - 1,
"i40evf-%s-%s-%d", basename,
"rx", rx_int_idx++);
} else if (q_vector->tx.ring) {
snprintf(q_vector->name, sizeof(q_vector->name) - 1,
"i40evf-%s-%s-%d", basename,
"tx", tx_int_idx++);
} else {
/* skip this unused q_vector */
continue;
}
err = request_irq(irq_num,
i40evf_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;
}
/* register for affinity change notifications */
q_vector->affinity_notify.notify = i40evf_irq_affinity_notify;
q_vector->affinity_notify.release =
i40evf_irq_affinity_release;
irq_set_affinity_notifier(irq_num, &q_vector->affinity_notify);
/* assign the mask for this irq */
irq_set_affinity_hint(irq_num, &q_vector->affinity_mask);
}
return 0;
free_queue_irqs:
while (vector) {
vector--;
irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
irq_set_affinity_notifier(irq_num, NULL);
irq_set_affinity_hint(irq_num, NULL);
free_irq(irq_num, &adapter->q_vectors[vector]);
}
return err;
}
/**
* i40evf_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 i40evf_request_misc_irq(struct i40evf_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
int err;
snprintf(adapter->misc_vector_name,
sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
dev_name(&adapter->pdev->dev));
err = request_irq(adapter->msix_entries[0].vector,
&i40evf_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;
}
/**
* i40evf_free_traffic_irqs - Free MSI-X interrupts
* @adapter: board private structure
*
* Frees all MSI-X vectors other than 0.
**/
static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
{
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++) {
irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
irq_set_affinity_notifier(irq_num, NULL);
irq_set_affinity_hint(irq_num, NULL);
free_irq(irq_num, &adapter->q_vectors[vector]);
}
}
/**
* i40evf_free_misc_irq - Free MSI-X miscellaneous vector
* @adapter: board private structure
*
* Frees MSI-X vector 0.
**/
static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
free_irq(adapter->msix_entries[0].vector, netdev);
}
/**
* i40evf_configure_tx - Configure Transmit Unit after Reset
* @adapter: board private structure
*
* Configure the Tx unit of the MAC after a reset.
**/
static void i40evf_configure_tx(struct i40evf_adapter *adapter)
{
struct i40e_hw *hw = &adapter->hw;
int i;
for (i = 0; i < adapter->num_active_queues; i++)
adapter->tx_rings[i].tail = hw->hw_addr + I40E_QTX_TAIL1(i);
}
/**
* i40evf_configure_rx - Configure Receive Unit after Reset
* @adapter: board private structure
*
* Configure the Rx unit of the MAC after a reset.
**/
static void i40evf_configure_rx(struct i40evf_adapter *adapter)
{
struct i40e_hw *hw = &adapter->hw;
int i;
for (i = 0; i < adapter->num_active_queues; i++) {
adapter->rx_rings[i].tail = hw->hw_addr + I40E_QRX_TAIL1(i);
adapter->rx_rings[i].rx_buf_len = I40EVF_RXBUFFER_2048;
}
}
/**
* i40evf_find_vlan - Search filter list for specific vlan filter
* @adapter: board private structure
* @vlan: vlan tag
*
* Returns ptr to the filter object or NULL
**/
static struct
i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
{
struct i40evf_vlan_filter *f;
list_for_each_entry(f, &adapter->vlan_filter_list, list) {
if (vlan == f->vlan)
return f;
}
return NULL;
}
/**
* i40evf_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
i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
{
struct i40evf_vlan_filter *f = NULL;
int count = 50;
while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
&adapter->crit_section)) {
udelay(1);
if (--count == 0)
goto out;
}
f = i40evf_find_vlan(adapter, vlan);
if (!f) {
f = kzalloc(sizeof(*f), GFP_ATOMIC);
if (!f)
goto clearout;
f->vlan = vlan;
INIT_LIST_HEAD(&f->list);
list_add(&f->list, &adapter->vlan_filter_list);
f->add = true;
adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
}
clearout:
clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
out:
return f;
}
/**
* i40evf_del_vlan - Remove a vlan filter from the list
* @adapter: board private structure
* @vlan: VLAN tag
**/
static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
{
struct i40evf_vlan_filter *f;
int count = 50;
while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
&adapter->crit_section)) {
udelay(1);
if (--count == 0)
return;
}
f = i40evf_find_vlan(adapter, vlan);
if (f) {
f->remove = true;
adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
}
clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
}
/**
* i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
* @netdev: network device struct
* @vid: VLAN tag
**/
static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
__always_unused __be16 proto, u16 vid)
{
struct i40evf_adapter *adapter = netdev_priv(netdev);
if (!VLAN_ALLOWED(adapter))
return -EIO;
if (i40evf_add_vlan(adapter, vid) == NULL)
return -ENOMEM;
return 0;
}
/**
* i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
* @netdev: network device struct
* @vid: VLAN tag
**/
static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
__always_unused __be16 proto, u16 vid)
{
struct i40evf_adapter *adapter = netdev_priv(netdev);
if (VLAN_ALLOWED(adapter)) {
i40evf_del_vlan(adapter, vid);
return 0;
}
return -EIO;
}
/**
* i40evf_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
**/
static struct
i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
u8 *macaddr)
{
struct i40evf_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;
}
/**
* i40e_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.
**/
static struct
i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
u8 *macaddr)
{
struct i40evf_mac_filter *f;
int count = 50;
if (!macaddr)
return NULL;
while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
&adapter->crit_section)) {
udelay(1);
if (--count == 0)
return NULL;
}
f = i40evf_find_filter(adapter, macaddr);
if (!f) {
f = kzalloc(sizeof(*f), GFP_ATOMIC);
if (!f) {
clear_bit(__I40EVF_IN_CRITICAL_TASK,
&adapter->crit_section);
return NULL;
}
ether_addr_copy(f->macaddr, macaddr);
list_add_tail(&f->list, &adapter->mac_filter_list);
f->add = true;
adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
}
clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
return f;
}
/**
* i40evf_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 i40evf_set_mac(struct net_device *netdev, void *p)
{
struct i40evf_adapter *adapter = netdev_priv(netdev);
struct i40e_hw *hw = &adapter->hw;
struct i40evf_mac_filter *f;
struct sockaddr *addr = p;
if (!is_valid_ether_addr(addr->sa_data))
return -EADDRNOTAVAIL;
if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
return 0;
if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF)
return -EPERM;
f = i40evf_find_filter(adapter, hw->mac.addr);
if (f) {
f->remove = true;
adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
}
f = i40evf_add_filter(adapter, addr->sa_data);
if (f) {
ether_addr_copy(hw->mac.addr, addr->sa_data);
ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
}
return (f == NULL) ? -ENOMEM : 0;
}
/**
* i40evf_set_rx_mode - NDO callback to set the netdev filters
* @netdev: network interface device structure
**/
static void i40evf_set_rx_mode(struct net_device *netdev)
{
struct i40evf_adapter *adapter = netdev_priv(netdev);
struct i40evf_mac_filter *f, *ftmp;
struct netdev_hw_addr *uca;
struct netdev_hw_addr *mca;
struct netdev_hw_addr *ha;
int count = 50;
/* add addr if not already in the filter list */
netdev_for_each_uc_addr(uca, netdev) {
i40evf_add_filter(adapter, uca->addr);
}
netdev_for_each_mc_addr(mca, netdev) {
i40evf_add_filter(adapter, mca->addr);
}
while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
&adapter->crit_section)) {
udelay(1);
if (--count == 0) {
dev_err(&adapter->pdev->dev,
"Failed to get lock in %s\n", __func__);
return;
}
}
/* remove filter if not in netdev list */
list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
netdev_for_each_mc_addr(mca, netdev)
if (ether_addr_equal(mca->addr, f->macaddr))
goto bottom_of_search_loop;
netdev_for_each_uc_addr(uca, netdev)
if (ether_addr_equal(uca->addr, f->macaddr))
goto bottom_of_search_loop;
for_each_dev_addr(netdev, ha)
if (ether_addr_equal(ha->addr, f->macaddr))
goto bottom_of_search_loop;
if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr))
goto bottom_of_search_loop;
/* f->macaddr wasn't found in uc, mc, or ha list so delete it */
f->remove = true;
adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
bottom_of_search_loop:
continue;
}
if (netdev->flags & IFF_PROMISC &&
!(adapter->flags & I40EVF_FLAG_PROMISC_ON))
adapter->aq_required |= I40EVF_FLAG_AQ_REQUEST_PROMISC;
else if (!(netdev->flags & IFF_PROMISC) &&
adapter->flags & I40EVF_FLAG_PROMISC_ON)
adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_PROMISC;
if (netdev->flags & IFF_ALLMULTI &&
!(adapter->flags & I40EVF_FLAG_ALLMULTI_ON))
adapter->aq_required |= I40EVF_FLAG_AQ_REQUEST_ALLMULTI;
else if (!(netdev->flags & IFF_ALLMULTI) &&
adapter->flags & I40EVF_FLAG_ALLMULTI_ON)
adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_ALLMULTI;
clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
}
/**
* i40evf_napi_enable_all - enable NAPI on all queue vectors
* @adapter: board private structure
**/
static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
{
int q_idx;
struct i40e_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(napi);
}
}
/**
* i40evf_napi_disable_all - disable NAPI on all queue vectors
* @adapter: board private structure
**/
static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
{
int q_idx;
struct i40e_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(&q_vector->napi);
}
}
/**
* i40evf_configure - set up transmit and receive data structures
* @adapter: board private structure
**/
static void i40evf_configure(struct i40evf_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
int i;
i40evf_set_rx_mode(netdev);
i40evf_configure_tx(adapter);
i40evf_configure_rx(adapter);
adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
for (i = 0; i < adapter->num_active_queues; i++) {
struct i40e_ring *ring = &adapter->rx_rings[i];
i40evf_alloc_rx_buffers(ring, I40E_DESC_UNUSED(ring));
}
}
/**
* i40evf_up_complete - Finish the last steps of bringing up a connection
* @adapter: board private structure
**/
static void i40evf_up_complete(struct i40evf_adapter *adapter)
{
adapter->state = __I40EVF_RUNNING;
clear_bit(__I40E_DOWN, &adapter->vsi.state);
i40evf_napi_enable_all(adapter);
adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
}
/**
* i40e_down - Shutdown the connection processing
* @adapter: board private structure
**/
void i40evf_down(struct i40evf_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
struct i40evf_mac_filter *f;
if (adapter->state <= __I40EVF_DOWN_PENDING)
return;
while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
&adapter->crit_section))
usleep_range(500, 1000);
netif_carrier_off(netdev);
netif_tx_disable(netdev);
adapter->link_up = false;
i40evf_napi_disable_all(adapter);
i40evf_irq_disable(adapter);
/* remove all MAC filters */
list_for_each_entry(f, &adapter->mac_filter_list, list) {
f->remove = true;
}
/* remove all VLAN filters */
list_for_each_entry(f, &adapter->vlan_filter_list, list) {
f->remove = true;
}
if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
adapter->state != __I40EVF_RESETTING) {
/* cancel any current operation */
adapter->current_op = I40E_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.
*/
adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
}
clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
}
/**
* i40evf_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
i40evf_acquire_msix_vectors(struct i40evf_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;
}
/**
* i40evf_free_queues - Free memory for all rings
* @adapter: board private structure to initialize
*
* Free all of the memory associated with queue pairs.
**/
static void i40evf_free_queues(struct i40evf_adapter *adapter)
{
if (!adapter->vsi_res)
return;
kfree(adapter->tx_rings);
adapter->tx_rings = NULL;
kfree(adapter->rx_rings);
adapter->rx_rings = NULL;
}
/**
* i40evf_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 i40evf_alloc_queues(struct i40evf_adapter *adapter)
{
int i;
adapter->tx_rings = kcalloc(adapter->num_active_queues,
sizeof(struct i40e_ring), GFP_KERNEL);
if (!adapter->tx_rings)
goto err_out;
adapter->rx_rings = kcalloc(adapter->num_active_queues,
sizeof(struct i40e_ring), GFP_KERNEL);
if (!adapter->rx_rings)
goto err_out;
for (i = 0; i < adapter->num_active_queues; i++) {
struct i40e_ring *tx_ring;
struct i40e_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->tx_itr_setting = (I40E_ITR_DYNAMIC | I40E_ITR_TX_DEF);
if (adapter->flags & I40E_FLAG_WB_ON_ITR_CAPABLE)
tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR;
rx_ring = &adapter->rx_rings[i];
rx_ring->queue_index = i;
rx_ring->netdev = adapter->netdev;
rx_ring->dev = &adapter->pdev->dev;
rx_ring->count = adapter->rx_desc_count;
rx_ring->rx_itr_setting = (I40E_ITR_DYNAMIC | I40E_ITR_RX_DEF);
}
return 0;
err_out:
i40evf_free_queues(adapter);
return -ENOMEM;
}
/**
* i40evf_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 i40evf_set_interrupt_capability(struct i40evf_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 a lot more vectors
* than CPU's. So let's be conservative and only ask for
* (roughly) twice the number of vectors as there are CPU's.
*/
v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
v_budget = min_t(int, v_budget, (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 = i40evf_acquire_msix_vectors(adapter, v_budget);
out:
netif_set_real_num_rx_queues(adapter->netdev, pairs);
netif_set_real_num_tx_queues(adapter->netdev, pairs);
return err;
}
/**
* i40e_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 i40evf_config_rss_aq(struct i40evf_adapter *adapter)
{
struct i40e_aqc_get_set_rss_key_data *rss_key =
(struct i40e_aqc_get_set_rss_key_data *)adapter->rss_key;
struct i40e_hw *hw = &adapter->hw;
int ret = 0;
if (adapter->current_op != I40E_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;
}
ret = i40evf_aq_set_rss_key(hw, adapter->vsi.id, rss_key);
if (ret) {
dev_err(&adapter->pdev->dev, "Cannot set RSS key, err %s aq_err %s\n",
i40evf_stat_str(hw, ret),
i40evf_aq_str(hw, hw->aq.asq_last_status));
return ret;
}
ret = i40evf_aq_set_rss_lut(hw, adapter->vsi.id, false,
adapter->rss_lut, adapter->rss_lut_size);
if (ret) {
dev_err(&adapter->pdev->dev, "Cannot set RSS lut, err %s aq_err %s\n",
i40evf_stat_str(hw, ret),
i40evf_aq_str(hw, hw->aq.asq_last_status));
}
return ret;
}
/**
* i40evf_config_rss_reg - Configure RSS keys and lut by writing registers
* @adapter: board private structure
*
* Returns 0 on success, negative on failure
**/
static int i40evf_config_rss_reg(struct i40evf_adapter *adapter)
{
struct i40e_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, I40E_VFQF_HKEY(i), dw[i]);
dw = (u32 *)adapter->rss_lut;
for (i = 0; i <= adapter->rss_lut_size / 4; i++)
wr32(hw, I40E_VFQF_HLUT(i), dw[i]);
i40e_flush(hw);
return 0;
}
/**
* i40evf_config_rss - Configure RSS keys and lut
* @adapter: board private structure
*
* Returns 0 on success, negative on failure
**/
int i40evf_config_rss(struct i40evf_adapter *adapter)
{
if (RSS_PF(adapter)) {
adapter->aq_required |= I40EVF_FLAG_AQ_SET_RSS_LUT |
I40EVF_FLAG_AQ_SET_RSS_KEY;
return 0;
} else if (RSS_AQ(adapter)) {
return i40evf_config_rss_aq(adapter);
} else {
return i40evf_config_rss_reg(adapter);
}
}
/**
* i40evf_fill_rss_lut - Fill the lut with default values
* @adapter: board private structure
**/
static void i40evf_fill_rss_lut(struct i40evf_adapter *adapter)
{
u16 i;
for (i = 0; i < adapter->rss_lut_size; i++)
adapter->rss_lut[i] = i % adapter->num_active_queues;
}
/**
* i40evf_init_rss - Prepare for RSS
* @adapter: board private structure
*
* Return 0 on success, negative on failure
**/
static int i40evf_init_rss(struct i40evf_adapter *adapter)
{
struct i40e_hw *hw = &adapter->hw;
int ret;
if (!RSS_PF(adapter)) {
/* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
if (adapter->vf_res->vf_offload_flags &
I40E_VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2)
adapter->hena = I40E_DEFAULT_RSS_HENA_EXPANDED;
else
adapter->hena = I40E_DEFAULT_RSS_HENA;
wr32(hw, I40E_VFQF_HENA(0), (u32)adapter->hena);
wr32(hw, I40E_VFQF_HENA(1), (u32)(adapter->hena >> 32));
}
i40evf_fill_rss_lut(adapter);
netdev_rss_key_fill((void *)adapter->rss_key, adapter->rss_key_size);
ret = i40evf_config_rss(adapter);
return ret;
}
/**
* i40evf_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 i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
{
int q_idx = 0, num_q_vectors;
struct i40e_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++) {
q_vector = &adapter->q_vectors[q_idx];
q_vector->adapter = adapter;
q_vector->vsi = &adapter->vsi;
q_vector->v_idx = q_idx;
netif_napi_add(adapter->netdev, &q_vector->napi,
i40evf_napi_poll, NAPI_POLL_WEIGHT);
}
return 0;
}
/**
* i40evf_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 i40evf_free_q_vectors(struct i40evf_adapter *adapter)
{
int q_idx, num_q_vectors;
int napi_vectors;
num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
napi_vectors = adapter->num_active_queues;
for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
struct i40e_q_vector *q_vector = &adapter->q_vectors[q_idx];
if (q_idx < napi_vectors)
netif_napi_del(&q_vector->napi);
}
kfree(adapter->q_vectors);
}
/**
* i40evf_reset_interrupt_capability - Reset MSIX setup
* @adapter: board private structure
*
**/
void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
{
if (!adapter->msix_entries)
return;
pci_disable_msix(adapter->pdev);
kfree(adapter->msix_entries);
adapter->msix_entries = NULL;
}
/**
* i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
* @adapter: board private structure to initialize
*
**/
int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
{
int err;
rtnl_lock();
err = i40evf_set_interrupt_capability(adapter);
rtnl_unlock();
if (err) {
dev_err(&adapter->pdev->dev,
"Unable to setup interrupt capabilities\n");
goto err_set_interrupt;
}
err = i40evf_alloc_q_vectors(adapter);
if (err) {
dev_err(&adapter->pdev->dev,
"Unable to allocate memory for queue vectors\n");
goto err_alloc_q_vectors;
}
err = i40evf_alloc_queues(adapter);
if (err) {
dev_err(&adapter->pdev->dev,
"Unable to allocate memory for queues\n");
goto err_alloc_queues;
}
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_queues:
i40evf_free_q_vectors(adapter);
err_alloc_q_vectors:
i40evf_reset_interrupt_capability(adapter);
err_set_interrupt:
return err;
}
/**
* i40evf_free_rss - Free memory used by RSS structs
* @adapter: board private structure
**/
static void i40evf_free_rss(struct i40evf_adapter *adapter)
{
kfree(adapter->rss_key);
adapter->rss_key = NULL;
kfree(adapter->rss_lut);
adapter->rss_lut = NULL;
}
/**
* i40evf_watchdog_timer - Periodic call-back timer
* @data: pointer to adapter disguised as unsigned long
**/
static void i40evf_watchdog_timer(unsigned long data)
{
struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
schedule_work(&adapter->watchdog_task);
/* timer will be rescheduled in watchdog task */
}
/**
* i40evf_watchdog_task - Periodic call-back task
* @work: pointer to work_struct
**/
static void i40evf_watchdog_task(struct work_struct *work)
{
struct i40evf_adapter *adapter = container_of(work,
struct i40evf_adapter,
watchdog_task);
struct i40e_hw *hw = &adapter->hw;
u32 reg_val;
if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
goto restart_watchdog;
if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
I40E_VFGEN_RSTAT_VFR_STATE_MASK;
if ((reg_val == I40E_VFR_VFACTIVE) ||
(reg_val == I40E_VFR_COMPLETED)) {
/* A chance for redemption! */
dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
adapter->state = __I40EVF_STARTUP;
adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
schedule_delayed_work(&adapter->init_task, 10);
clear_bit(__I40EVF_IN_CRITICAL_TASK,
&adapter->crit_section);
/* Don't reschedule the watchdog, since we've restarted
* the init task. When init_task contacts the PF and
* gets everything set up again, it'll restart the
* watchdog for us. Down, boy. Sit. Stay. Woof.
*/
return;
}
adapter->aq_required = 0;
adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
goto watchdog_done;
}
if ((adapter->state < __I40EVF_DOWN) ||
(adapter->flags & I40EVF_FLAG_RESET_PENDING))
goto watchdog_done;
/* check for reset */
reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
adapter->state = __I40EVF_RESETTING;
adapter->flags |= I40EVF_FLAG_RESET_PENDING;
dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
schedule_work(&adapter->reset_task);
adapter->aq_required = 0;
adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
goto watchdog_done;
}
/* Process admin queue tasks. After init, everything gets done
* here so we don't race on the admin queue.
*/
if (adapter->current_op) {
if (!i40evf_asq_done(hw)) {
dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
i40evf_send_api_ver(adapter);
}
goto watchdog_done;
}
if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
i40evf_send_vf_config_msg(adapter);
goto watchdog_done;
}
if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
i40evf_disable_queues(adapter);
goto watchdog_done;
}
if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
i40evf_map_queues(adapter);
goto watchdog_done;
}
if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
i40evf_add_ether_addrs(adapter);
goto watchdog_done;
}
if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
i40evf_add_vlans(adapter);
goto watchdog_done;
}
if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
i40evf_del_ether_addrs(adapter);
goto watchdog_done;
}
if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
i40evf_del_vlans(adapter);
goto watchdog_done;
}
if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
i40evf_configure_queues(adapter);
goto watchdog_done;
}
if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
i40evf_enable_queues(adapter);
goto watchdog_done;
}
if (adapter->aq_required & I40EVF_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.
*/
i40evf_init_rss(adapter);
adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
goto watchdog_done;
}
if (adapter->aq_required & I40EVF_FLAG_AQ_GET_HENA) {
i40evf_get_hena(adapter);
goto watchdog_done;
}
if (adapter->aq_required & I40EVF_FLAG_AQ_SET_HENA) {
i40evf_set_hena(adapter);
goto watchdog_done;
}
if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_KEY) {
i40evf_set_rss_key(adapter);
goto watchdog_done;
}
if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_LUT) {
i40evf_set_rss_lut(adapter);
goto watchdog_done;
}
if (adapter->aq_required & I40EVF_FLAG_AQ_REQUEST_PROMISC) {
i40evf_set_promiscuous(adapter, I40E_FLAG_VF_UNICAST_PROMISC |
I40E_FLAG_VF_MULTICAST_PROMISC);
goto watchdog_done;
}
if (adapter->aq_required & I40EVF_FLAG_AQ_REQUEST_ALLMULTI) {
i40evf_set_promiscuous(adapter, I40E_FLAG_VF_MULTICAST_PROMISC);
goto watchdog_done;
}
if ((adapter->aq_required & I40EVF_FLAG_AQ_RELEASE_PROMISC) &&
(adapter->aq_required & I40EVF_FLAG_AQ_RELEASE_ALLMULTI)) {
i40evf_set_promiscuous(adapter, 0);
goto watchdog_done;
}
if (adapter->state == __I40EVF_RUNNING)
i40evf_request_stats(adapter);
watchdog_done:
if (adapter->state == __I40EVF_RUNNING) {
i40evf_irq_enable_queues(adapter, ~0);
i40evf_fire_sw_int(adapter, 0xFF);
} else {
i40evf_fire_sw_int(adapter, 0x1);
}
clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
restart_watchdog:
if (adapter->state == __I40EVF_REMOVE)
return;
if (adapter->aq_required)
mod_timer(&adapter->watchdog_timer,
jiffies + msecs_to_jiffies(20));
else
mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
schedule_work(&adapter->adminq_task);
}
static void i40evf_disable_vf(struct i40evf_adapter *adapter)
{
struct i40evf_mac_filter *f, *ftmp;
struct i40evf_vlan_filter *fv, *fvtmp;
adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
if (netif_running(adapter->netdev)) {
set_bit(__I40E_DOWN, &adapter->vsi.state);
netif_carrier_off(adapter->netdev);
netif_tx_disable(adapter->netdev);
adapter->link_up = false;
i40evf_napi_disable_all(adapter);
i40evf_irq_disable(adapter);
i40evf_free_traffic_irqs(adapter);
i40evf_free_all_tx_resources(adapter);
i40evf_free_all_rx_resources(adapter);
}
/* Delete all of the filters, both MAC and VLAN. */
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);
}
i40evf_free_misc_irq(adapter);
i40evf_reset_interrupt_capability(adapter);
i40evf_free_queues(adapter);
i40evf_free_q_vectors(adapter);
kfree(adapter->vf_res);
i40evf_shutdown_adminq(&adapter->hw);
adapter->netdev->flags &= ~IFF_UP;
clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
adapter->state = __I40EVF_DOWN;
dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
}
#define I40EVF_RESET_WAIT_MS 10
#define I40EVF_RESET_WAIT_COUNT 500
/**
* i40evf_reset_task - Call-back task to handle hardware reset
* @work: pointer to work_struct
*
* During reset we need to shut down and reinitialize the admin queue
* before we can use it to communicate with the PF again. We also clear
* and reinit the rings because that context is lost as well.
**/
static void i40evf_reset_task(struct work_struct *work)
{
struct i40evf_adapter *adapter = container_of(work,
struct i40evf_adapter,
reset_task);
struct net_device *netdev = adapter->netdev;
struct i40e_hw *hw = &adapter->hw;
struct i40evf_vlan_filter *vlf;
struct i40evf_mac_filter *f;
u32 reg_val;
int i = 0, err;
while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
&adapter->crit_section))
usleep_range(500, 1000);
i40evf_misc_irq_disable(adapter);
if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
adapter->flags &= ~I40EVF_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.
*/
i40evf_shutdown_adminq(hw);
i40evf_init_adminq(hw);
i40evf_request_reset(adapter);
}
adapter->flags |= I40EVF_FLAG_RESET_PENDING;
/* poll until we see the reset actually happen */
for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
reg_val = rd32(hw, I40E_VF_ARQLEN1) &
I40E_VF_ARQLEN1_ARQENABLE_MASK;
if (!reg_val)
break;
usleep_range(5000, 10000);
}
if (i == I40EVF_RESET_WAIT_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 < I40EVF_RESET_WAIT_COUNT; i++) {
/* sleep first to make sure a minimum wait time is met */
msleep(I40EVF_RESET_WAIT_MS);
reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
I40E_VFGEN_RSTAT_VFR_STATE_MASK;
if (reg_val == I40E_VFR_VFACTIVE)
break;
}
pci_set_master(adapter->pdev);
if (i == I40EVF_RESET_WAIT_COUNT) {
dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
reg_val);
i40evf_disable_vf(adapter);
return; /* Do not attempt to reinit. It's dead, Jim. */
}
continue_reset:
if (netif_running(adapter->netdev)) {
netif_carrier_off(netdev);
netif_tx_stop_all_queues(netdev);
adapter->link_up = false;
i40evf_napi_disable_all(adapter);
}
i40evf_irq_disable(adapter);
adapter->state = __I40EVF_RESETTING;
adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
/* free the Tx/Rx rings and descriptors, might be better to just
* re-use them sometime in the future
*/
i40evf_free_all_rx_resources(adapter);
i40evf_free_all_tx_resources(adapter);
/* kill and reinit the admin queue */
i40evf_shutdown_adminq(hw);
adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
err = i40evf_init_adminq(hw);
if (err)
dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
err);
adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
/* re-add all MAC filters */
list_for_each_entry(f, &adapter->mac_filter_list, list) {
f->add = true;
}
/* re-add all VLAN filters */
list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
vlf->add = true;
}
adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
/* Open RDMA Client again */
adapter->aq_required |= I40EVF_FLAG_SERVICE_CLIENT_REQUESTED;
clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
i40evf_misc_irq_enable(adapter);
mod_timer(&adapter->watchdog_timer, jiffies + 2);
if (netif_running(adapter->netdev)) {
/* allocate transmit descriptors */
err = i40evf_setup_all_tx_resources(adapter);
if (err)
goto reset_err;
/* allocate receive descriptors */
err = i40evf_setup_all_rx_resources(adapter);
if (err)
goto reset_err;
i40evf_configure(adapter);
i40evf_up_complete(adapter);
i40evf_irq_enable(adapter, true);
} else {
adapter->state = __I40EVF_DOWN;
}
return;
reset_err:
dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
i40evf_close(adapter->netdev);
}
/**
* i40evf_adminq_task - worker thread to clean the admin queue
* @work: pointer to work_struct containing our data
**/
static void i40evf_adminq_task(struct work_struct *work)
{
struct i40evf_adapter *adapter =
container_of(work, struct i40evf_adapter, adminq_task);
struct i40e_hw *hw = &adapter->hw;
struct i40e_arq_event_info event;
struct i40e_virtchnl_msg *v_msg;
i40e_status ret;
u32 val, oldval;
u16 pending;
if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
goto out;
event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
if (!event.msg_buf)
goto out;
v_msg = (struct i40e_virtchnl_msg *)&event.desc;
do {
ret = i40evf_clean_arq_element(hw, &event, &pending);
if (ret || !v_msg->v_opcode)
break; /* No event to process or error cleaning ARQ */
i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
v_msg->v_retval, event.msg_buf,
event.msg_len);
if (pending != 0)
memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
} while (pending);
if ((adapter->flags &
(I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
adapter->state == __I40EVF_RESETTING)
goto freedom;
/* check for error indications */
val = rd32(hw, hw->aq.arq.len);
if (val == 0xdeadbeef) /* indicates device in reset */
goto freedom;
oldval = val;
if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
}
if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
}
if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
}
if (oldval != val)
wr32(hw, hw->aq.arq.len, val);
val = rd32(hw, hw->aq.asq.len);
oldval = val;
if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
}
if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
}
if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
}
if (oldval != val)
wr32(hw, hw->aq.asq.len, val);
freedom:
kfree(event.msg_buf);
out:
/* re-enable Admin queue interrupt cause */
i40evf_misc_irq_enable(adapter);
}
/**
* i40evf_free_all_tx_resources - Free Tx Resources for All Queues
* @adapter: board private structure
*
* Free all transmit software resources
**/
void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
{
int i;
if (!adapter->tx_rings)
return;
for (i = 0; i < adapter->num_active_queues; i++)
if (adapter->tx_rings[i].desc)
i40evf_free_tx_resources(&adapter->tx_rings[i]);
}
/**
* i40evf_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 i40evf_setup_all_tx_resources(struct i40evf_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 = i40evf_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;
}
/**
* i40evf_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 i40evf_setup_all_rx_resources(struct i40evf_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 = i40evf_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;
}
/**
* i40evf_free_all_rx_resources - Free Rx Resources for All Queues
* @adapter: board private structure
*
* Free all receive software resources
**/
void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
{
int i;
if (!adapter->rx_rings)
return;
for (i = 0; i < adapter->num_active_queues; i++)
if (adapter->rx_rings[i].desc)
i40evf_free_rx_resources(&adapter->rx_rings[i]);
}
/**
* i40evf_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 timer is started,
* and the stack is notified that the interface is ready.
**/
static int i40evf_open(struct net_device *netdev)
{
struct i40evf_adapter *adapter = netdev_priv(netdev);
int err;
if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
return -EIO;
}
if (adapter->state != __I40EVF_DOWN)
return -EBUSY;
/* allocate transmit descriptors */
err = i40evf_setup_all_tx_resources(adapter);
if (err)
goto err_setup_tx;
/* allocate receive descriptors */
err = i40evf_setup_all_rx_resources(adapter);
if (err)
goto err_setup_rx;
/* clear any pending interrupts, may auto mask */
err = i40evf_request_traffic_irqs(adapter, netdev->name);
if (err)
goto err_req_irq;
i40evf_add_filter(adapter, adapter->hw.mac.addr);
i40evf_configure(adapter);
i40evf_up_complete(adapter);
i40evf_irq_enable(adapter, true);
return 0;
err_req_irq:
i40evf_down(adapter);
i40evf_free_traffic_irqs(adapter);
err_setup_rx:
i40evf_free_all_rx_resources(adapter);
err_setup_tx:
i40evf_free_all_tx_resources(adapter);
return err;
}
/**
* i40evf_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 i40evf_close(struct net_device *netdev)
{
struct i40evf_adapter *adapter = netdev_priv(netdev);
if (adapter->state <= __I40EVF_DOWN_PENDING)
return 0;
set_bit(__I40E_DOWN, &adapter->vsi.state);
i40evf_down(adapter);
adapter->state = __I40EVF_DOWN_PENDING;
i40evf_free_traffic_irqs(adapter);
return 0;
}
/**
* i40evf_get_stats - Get System Network Statistics
* @netdev: network interface device structure
*
* Returns the address of the device statistics structure.
* The statistics are actually updated from the timer callback.
**/
static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
{
struct i40evf_adapter *adapter = netdev_priv(netdev);
/* only return the current stats */
return &adapter->net_stats;
}
/**
* i40evf_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 i40evf_change_mtu(struct net_device *netdev, int new_mtu)
{
struct i40evf_adapter *adapter = netdev_priv(netdev);
netdev->mtu = new_mtu;
adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
schedule_work(&adapter->reset_task);
return 0;
}
/**
* i40evf_features_check - Validate encapsulated packet conforms to limits
* @skb: skb buff
* @netdev: This physical port's netdev
* @features: Offload features that the stack believes apply
**/
static netdev_features_t i40evf_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_header(skb) - skb->data;
if (len & ~(63 * 2))
goto out_err;
/* IPLEN and EIPLEN can support at most 127 dwords */
len = skb_transport_header(skb) - skb_network_header(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
* 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);
}
#define I40EVF_VLAN_FEATURES (NETIF_F_HW_VLAN_CTAG_TX |\
NETIF_F_HW_VLAN_CTAG_RX |\
NETIF_F_HW_VLAN_CTAG_FILTER)
/**
* i40evf_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 i40evf_fix_features(struct net_device *netdev,
netdev_features_t features)
{
struct i40evf_adapter *adapter = netdev_priv(netdev);
features &= ~I40EVF_VLAN_FEATURES;
if (adapter->vf_res->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_VLAN)
features |= I40EVF_VLAN_FEATURES;
return features;
}
static const struct net_device_ops i40evf_netdev_ops = {
.ndo_open = i40evf_open,
.ndo_stop = i40evf_close,
.ndo_start_xmit = i40evf_xmit_frame,
.ndo_get_stats = i40evf_get_stats,
.ndo_set_rx_mode = i40evf_set_rx_mode,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = i40evf_set_mac,
.ndo_change_mtu = i40evf_change_mtu,
.ndo_tx_timeout = i40evf_tx_timeout,
.ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
.ndo_features_check = i40evf_features_check,
.ndo_fix_features = i40evf_fix_features,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = i40evf_netpoll,
#endif
};
/**
* i40evf_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 i40evf_check_reset_complete(struct i40e_hw *hw)
{
u32 rstat;
int i;
for (i = 0; i < 100; i++) {
rstat = rd32(hw, I40E_VFGEN_RSTAT) &
I40E_VFGEN_RSTAT_VFR_STATE_MASK;
if ((rstat == I40E_VFR_VFACTIVE) ||
(rstat == I40E_VFR_COMPLETED))
return 0;
usleep_range(10, 20);
}
return -EBUSY;
}
/**
* i40evf_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 i40evf_process_config(struct i40evf_adapter *adapter)
{
struct i40e_virtchnl_vf_resource *vfres = adapter->vf_res;
struct net_device *netdev = adapter->netdev;
struct i40e_vsi *vsi = &adapter->vsi;
int i;
/* got VF config message back from PF, now we can parse it */
for (i = 0; i < vfres->num_vsis; i++) {
if (vfres->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
adapter->vsi_res = &vfres->vsi_res[i];
}
if (!adapter->vsi_res) {
dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
return -ENODEV;
}
netdev->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_GSO_GRE |
NETIF_F_GSO_GRE_CSUM |
NETIF_F_GSO_IPXIP4 |
NETIF_F_GSO_IPXIP6 |
NETIF_F_GSO_UDP_TUNNEL |
NETIF_F_GSO_UDP_TUNNEL_CSUM |
NETIF_F_GSO_PARTIAL |
NETIF_F_SCTP_CRC |
NETIF_F_RXHASH |
NETIF_F_RXCSUM |
0;
if (!(adapter->flags & I40EVF_FLAG_OUTER_UDP_CSUM_CAPABLE))
netdev->gso_partial_features |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
/* record features VLANs can make use of */
netdev->vlan_features |= netdev->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 registgered.
*/
netdev->hw_features |= netdev->hw_enc_features;
netdev->features |= netdev->hw_enc_features | I40EVF_VLAN_FEATURES;
netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
/* disable VLAN features if not supported */
if (!(vfres->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_VLAN))
netdev->features ^= I40EVF_VLAN_FEATURES;
adapter->vsi.id = adapter->vsi_res->vsi_id;
adapter->vsi.back = adapter;
adapter->vsi.base_vector = 1;
adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
vsi->netdev = adapter->netdev;
vsi->qs_handle = adapter->vsi_res->qset_handle;
if (vfres->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_RSS_PF) {
adapter->rss_key_size = vfres->rss_key_size;
adapter->rss_lut_size = vfres->rss_lut_size;
} else {
adapter->rss_key_size = I40EVF_HKEY_ARRAY_SIZE;
adapter->rss_lut_size = I40EVF_HLUT_ARRAY_SIZE;
}
return 0;
}
/**
* i40evf_init_task - worker thread to perform delayed initialization
* @work: pointer to work_struct containing our data
*
* This task completes the work that was begun in probe. Due to the nature
* of VF-PF communications, we may need to wait tens of milliseconds to get
* responses back from the PF. Rather than busy-wait in probe and bog down the
* whole system, we'll do it in a task so we can sleep.
* This task only runs during driver init. Once we've established
* communications with the PF driver and set up our netdev, the watchdog
* takes over.
**/
static void i40evf_init_task(struct work_struct *work)
{
struct i40evf_adapter *adapter = container_of(work,
struct i40evf_adapter,
init_task.work);
struct net_device *netdev = adapter->netdev;
struct i40e_hw *hw = &adapter->hw;
struct pci_dev *pdev = adapter->pdev;
int err, bufsz;
switch (adapter->state) {
case __I40EVF_STARTUP:
/* driver loaded, probe complete */
adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
err = i40e_set_mac_type(hw);
if (err) {
dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
err);
goto err;
}
err = i40evf_check_reset_complete(hw);
if (err) {
dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
err);
goto err;
}
hw->aq.num_arq_entries = I40EVF_AQ_LEN;
hw->aq.num_asq_entries = I40EVF_AQ_LEN;
hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
err = i40evf_init_adminq(hw);
if (err) {
dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
err);
goto err;
}
err = i40evf_send_api_ver(adapter);
if (err) {
dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
i40evf_shutdown_adminq(hw);
goto err;
}
adapter->state = __I40EVF_INIT_VERSION_CHECK;
goto restart;
case __I40EVF_INIT_VERSION_CHECK:
if (!i40evf_asq_done(hw)) {
dev_err(&pdev->dev, "Admin queue command never completed\n");
i40evf_shutdown_adminq(hw);
adapter->state = __I40EVF_STARTUP;
goto err;
}
/* aq msg sent, awaiting reply */
err = i40evf_verify_api_ver(adapter);
if (err) {
if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
err = i40evf_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,
I40E_VIRTCHNL_VERSION_MAJOR,
I40E_VIRTCHNL_VERSION_MINOR);
goto err;
}
err = i40evf_send_vf_config_msg(adapter);
if (err) {
dev_err(&pdev->dev, "Unable to send config request (%d)\n",
err);
goto err;
}
adapter->state = __I40EVF_INIT_GET_RESOURCES;
goto restart;
case __I40EVF_INIT_GET_RESOURCES:
/* aq msg sent, awaiting reply */
if (!adapter->vf_res) {
bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
(I40E_MAX_VF_VSI *
sizeof(struct i40e_virtchnl_vsi_resource));
adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
if (!adapter->vf_res)
goto err;
}
err = i40evf_get_vf_config(adapter);
if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
err = i40evf_send_vf_config_msg(adapter);
goto err;
} else if (err == I40E_ERR_PARAM) {
/* We only get ERR_PARAM 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.
*/
i40evf_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;
}
adapter->state = __I40EVF_INIT_SW;
break;
default:
goto err_alloc;
}
if (hw->mac.type == I40E_MAC_X722_VF)
adapter->flags |= I40EVF_FLAG_OUTER_UDP_CSUM_CAPABLE;
if (i40evf_process_config(adapter))
goto err_alloc;
adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
netdev->netdev_ops = &i40evf_netdev_ops;
i40evf_set_ethtool_ops(netdev);
netdev->watchdog_timeo = 5 * HZ;
/* MTU range: 68 - 9710 */
netdev->min_mtu = ETH_MIN_MTU;
netdev->max_mtu = I40E_MAX_RXBUFFER - (ETH_HLEN + ETH_FCS_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 {
adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
}
init_timer(&adapter->watchdog_timer);
adapter->watchdog_timer.function = &i40evf_watchdog_timer;
adapter->watchdog_timer.data = (unsigned long)adapter;
mod_timer(&adapter->watchdog_timer, jiffies + 1);
adapter->num_active_queues = min_t(int,
adapter->vsi_res->num_queue_pairs,
(int)(num_online_cpus()));
adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
err = i40evf_init_interrupt_scheme(adapter);
if (err)
goto err_sw_init;
i40evf_map_rings_to_vectors(adapter);
if (adapter->vf_res->vf_offload_flags &
I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
err = i40evf_request_misc_irq(adapter);
if (err)
goto err_sw_init;
netif_carrier_off(netdev);
adapter->link_up = false;
if (!adapter->netdev_registered) {
err = register_netdev(netdev);
if (err)
goto err_register;
}
adapter->netdev_registered = true;
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");
adapter->state = __I40EVF_DOWN;
set_bit(__I40E_DOWN, &adapter->vsi.state);
i40evf_misc_irq_enable(adapter);
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)
goto err_mem;
if (RSS_AQ(adapter)) {
adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
} else {
i40evf_init_rss(adapter);
}
return;
restart:
schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
return;
err_mem:
i40evf_free_rss(adapter);
err_register:
i40evf_free_misc_irq(adapter);
err_sw_init:
i40evf_reset_interrupt_capability(adapter);
err_alloc:
kfree(adapter->vf_res);
adapter->vf_res = NULL;
err:
/* Things went into the weeds, so try again later */
if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
dev_err(&pdev->dev, "Failed to communicate with PF; waiting before retry\n");
adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
i40evf_shutdown_adminq(hw);
adapter->state = __I40EVF_STARTUP;
schedule_delayed_work(&adapter->init_task, HZ * 5);
return;
}
schedule_delayed_work(&adapter->init_task, HZ);
}
/**
* i40evf_shutdown - Shutdown the device in preparation for a reboot
* @pdev: pci device structure
**/
static void i40evf_shutdown(struct pci_dev *pdev)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct i40evf_adapter *adapter = netdev_priv(netdev);
netif_device_detach(netdev);
if (netif_running(netdev))
i40evf_close(netdev);
/* Prevent the watchdog from running. */
adapter->state = __I40EVF_REMOVE;
adapter->aq_required = 0;
#ifdef CONFIG_PM
pci_save_state(pdev);
#endif
pci_disable_device(pdev);
}
/**
* i40evf_probe - Device Initialization Routine
* @pdev: PCI device information struct
* @ent: entry in i40evf_pci_tbl
*
* Returns 0 on success, negative on failure
*
* i40evf_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 i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct net_device *netdev;
struct i40evf_adapter *adapter = NULL;
struct i40e_hw *hw = NULL;
int err;
err = pci_enable_device(pdev);
if (err)
return err;
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
if (err) {
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (err) {
dev_err(&pdev->dev,
"DMA configuration failed: 0x%x\n", err);
goto err_dma;
}
}
err = pci_request_regions(pdev, i40evf_driver_name);
if (err) {
dev_err(&pdev->dev,
"pci_request_regions failed 0x%x\n", err);
goto err_pci_reg;
}
pci_enable_pcie_error_reporting(pdev);
pci_set_master(pdev);
netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter), MAX_QUEUES);
if (!netdev) {
err = -ENOMEM;
goto err_alloc_etherdev;
}
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->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
adapter->state = __I40EVF_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);
/* set up the locks for the AQ, do this only once in probe
* and destroy them only once in remove
*/
mutex_init(&hw->aq.asq_mutex);
mutex_init(&hw->aq.arq_mutex);
INIT_LIST_HEAD(&adapter->mac_filter_list);
INIT_LIST_HEAD(&adapter->vlan_filter_list);
INIT_WORK(&adapter->reset_task, i40evf_reset_task);
INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
schedule_delayed_work(&adapter->init_task,
msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
return 0;
err_ioremap:
free_netdev(netdev);
err_alloc_etherdev:
pci_release_regions(pdev);
err_pci_reg:
err_dma:
pci_disable_device(pdev);
return err;
}
#ifdef CONFIG_PM
/**
* i40evf_suspend - Power management suspend routine
* @pdev: PCI device information struct
* @state: unused
*
* Called when the system (VM) is entering sleep/suspend.
**/
static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct i40evf_adapter *adapter = netdev_priv(netdev);
int retval = 0;
netif_device_detach(netdev);
if (netif_running(netdev)) {
rtnl_lock();
i40evf_down(adapter);
rtnl_unlock();
}
i40evf_free_misc_irq(adapter);
i40evf_reset_interrupt_capability(adapter);
retval = pci_save_state(pdev);
if (retval)
return retval;
pci_disable_device(pdev);
return 0;
}
/**
* i40evf_resume - Power management resume routine
* @pdev: PCI device information struct
*
* Called when the system (VM) is resumed from sleep/suspend.
**/
static int i40evf_resume(struct pci_dev *pdev)
{
struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
struct net_device *netdev = adapter->netdev;
u32 err;
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
/* pci_restore_state clears dev->state_saved so call
* pci_save_state to restore it.
*/
pci_save_state(pdev);
err = pci_enable_device_mem(pdev);
if (err) {
dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
return err;
}
pci_set_master(pdev);
rtnl_lock();
err = i40evf_set_interrupt_capability(adapter);
if (err) {
rtnl_unlock();
dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
return err;
}
err = i40evf_request_misc_irq(adapter);
rtnl_unlock();
if (err) {
dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
return err;
}
schedule_work(&adapter->reset_task);
netif_device_attach(netdev);
return err;
}
#endif /* CONFIG_PM */
/**
* i40evf_remove - Device Removal Routine
* @pdev: PCI device information struct
*
* i40evf_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 i40evf_remove(struct pci_dev *pdev)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct i40evf_adapter *adapter = netdev_priv(netdev);
struct i40evf_mac_filter *f, *ftmp;
struct i40e_hw *hw = &adapter->hw;
cancel_delayed_work_sync(&adapter->init_task);
cancel_work_sync(&adapter->reset_task);
if (adapter->netdev_registered) {
unregister_netdev(netdev);
adapter->netdev_registered = false;
}
/* Shut down all the garbage mashers on the detention level */
adapter->state = __I40EVF_REMOVE;
adapter->aq_required = 0;
i40evf_request_reset(adapter);
msleep(50);
/* If the FW isn't responding, kick it once, but only once. */
if (!i40evf_asq_done(hw)) {
i40evf_request_reset(adapter);
msleep(50);
}
if (adapter->msix_entries) {
i40evf_misc_irq_disable(adapter);
i40evf_free_misc_irq(adapter);
i40evf_reset_interrupt_capability(adapter);
i40evf_free_q_vectors(adapter);
}
if (adapter->watchdog_timer.function)
del_timer_sync(&adapter->watchdog_timer);
flush_scheduled_work();
i40evf_free_rss(adapter);
if (hw->aq.asq.count)
i40evf_shutdown_adminq(hw);
/* destroy the locks only once, here */
mutex_destroy(&hw->aq.arq_mutex);
mutex_destroy(&hw->aq.asq_mutex);
iounmap(hw->hw_addr);
pci_release_regions(pdev);
i40evf_free_all_tx_resources(adapter);
i40evf_free_all_rx_resources(adapter);
i40evf_free_queues(adapter);
kfree(adapter->vf_res);
/* 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(f, ftmp, &adapter->vlan_filter_list, list) {
list_del(&f->list);
kfree(f);
}
free_netdev(netdev);
pci_disable_pcie_error_reporting(pdev);
pci_disable_device(pdev);
}
static struct pci_driver i40evf_driver = {
.name = i40evf_driver_name,
.id_table = i40evf_pci_tbl,
.probe = i40evf_probe,
.remove = i40evf_remove,
#ifdef CONFIG_PM
.suspend = i40evf_suspend,
.resume = i40evf_resume,
#endif
.shutdown = i40evf_shutdown,
};
/**
* i40e_init_module - Driver Registration Routine
*
* i40e_init_module is the first routine called when the driver is
* loaded. All it does is register with the PCI subsystem.
**/
static int __init i40evf_init_module(void)
{
int ret;
pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
i40evf_driver_version);
pr_info("%s\n", i40evf_copyright);
i40evf_wq = alloc_workqueue("%s", WQ_UNBOUND | WQ_MEM_RECLAIM, 1,
i40evf_driver_name);
if (!i40evf_wq) {
pr_err("%s: Failed to create workqueue\n", i40evf_driver_name);
return -ENOMEM;
}
ret = pci_register_driver(&i40evf_driver);
return ret;
}
module_init(i40evf_init_module);
/**
* i40e_exit_module - Driver Exit Cleanup Routine
*
* i40e_exit_module is called just before the driver is removed
* from memory.
**/
static void __exit i40evf_exit_module(void)
{
pci_unregister_driver(&i40evf_driver);
destroy_workqueue(i40evf_wq);
}
module_exit(i40evf_exit_module);
/* i40evf_main.c */
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