// SPDX-License-Identifier: GPL-2.0-only /**************************************************************************** * Driver for Solarflare network controllers and boards * Copyright 2018 Solarflare Communications Inc. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation, incorporated herein by reference.
*/
/* This is the time (in jiffies) between invocations of the hardware * monitor.
*/ staticunsignedint efx_monitor_interval = 1 * HZ;
/* How often and how many times to poll for a reset while waiting for a * BIST that another function started to complete.
*/ #define BIST_WAIT_DELAY_MS 100 #define BIST_WAIT_DELAY_COUNT 100
/* Default stats update time */ #define STATS_PERIOD_MS_DEFAULT 1000
/* Reset workqueue. If any NIC has a hardware failure then a reset will be * queued onto this work queue. This is not a per-nic work queue, because * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised.
*/ staticstruct workqueue_struct *reset_workqueue;
int efx_create_reset_workqueue(void)
{
reset_workqueue = create_singlethread_workqueue("sfc_reset"); if (!reset_workqueue) {
printk(KERN_ERR "Failed to create reset workqueue\n"); return -ENOMEM;
}
/* We assume that efx->type->reconfigure_mac will always try to sync RX * filters and therefore needs to read-lock the filter table against freeing
*/ void efx_mac_reconfigure(struct efx_nic *efx, bool mtu_only)
{ if (efx->type->reconfigure_mac) {
down_read(&efx->filter_sem);
efx->type->reconfigure_mac(efx, mtu_only);
up_read(&efx->filter_sem);
}
}
/* Asynchronous work item for changing MAC promiscuity and multicast * hash. Avoid a drain/rx_ingress enable by reconfiguring the current * MAC directly.
*/ staticvoid efx_mac_work(struct work_struct *data)
{ struct efx_nic *efx = container_of(data, struct efx_nic, mac_work);
mutex_lock(&efx->mac_lock); if (efx->port_enabled)
efx_mac_reconfigure(efx, false);
mutex_unlock(&efx->mac_lock);
}
if (efx->port_enabled)
queue_work(efx->workqueue, &efx->mac_work); /* Otherwise efx_start_port() will do this */
}
int efx_set_features(struct net_device *net_dev, netdev_features_t data)
{ struct efx_nic *efx = efx_netdev_priv(net_dev); int rc;
/* If disabling RX n-tuple filtering, clear existing filters */ if (net_dev->features & ~data & NETIF_F_NTUPLE) {
rc = efx->type->filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL); if (rc) return rc;
}
/* If Rx VLAN filter is changed, update filters via mac_reconfigure. * If rx-fcs is changed, mac_reconfigure updates that too.
*/ if ((net_dev->features ^ data) & (NETIF_F_HW_VLAN_CTAG_FILTER |
NETIF_F_RXFCS)) { /* efx_set_rx_mode() will schedule MAC work to update filters * when a new features are finally set in net_dev.
*/
efx_set_rx_mode(net_dev);
}
return 0;
}
/* This ensures that the kernel is kept informed (via * netif_carrier_on/off) of the link status, and also maintains the * link status's stop on the port's TX queue.
*/ void efx_link_status_changed(struct efx_nic *efx)
{ struct efx_link_state *link_state = &efx->link_state;
/* SFC Bug 5356: A net_dev notifier is registered, so we must ensure * that no events are triggered between unregister_netdev() and the * driver unloading. A more general condition is that NETDEV_CHANGE * can only be generated between NETDEV_UP and NETDEV_DOWN
*/ if (!netif_running(efx->net_dev)) return;
if (link_state->up != netif_carrier_ok(efx->net_dev)) {
efx->n_link_state_changes++;
if (link_state->up)
netif_carrier_on(efx->net_dev); else
netif_carrier_off(efx->net_dev);
}
/* Status message for kernel log */ if (link_state->up)
netif_info(efx, link, efx->net_dev, "link up at %uMbps %s-duplex (MTU %d)\n",
link_state->speed, link_state->fd ? "full" : "half",
efx->net_dev->mtu); else
netif_info(efx, link, efx->net_dev, "link down\n");
}
unsignedint efx_xdp_max_mtu(struct efx_nic *efx)
{ /* The maximum MTU that we can fit in a single page, allowing for * framing, overhead and XDP headroom + tailroom.
*/ int overhead = EFX_MAX_FRAME_LEN(0) + sizeof(struct efx_rx_page_state) +
efx->rx_prefix_size + efx->type->rx_buffer_padding +
efx->rx_ip_align + EFX_XDP_HEADROOM + EFX_XDP_TAILROOM;
return PAGE_SIZE - overhead;
}
/* Context: process, rtnl_lock() held. */ int efx_change_mtu(struct net_device *net_dev, int new_mtu)
{ struct efx_nic *efx = efx_netdev_priv(net_dev); int rc;
rc = efx_check_disabled(efx); if (rc) return rc;
if (rtnl_dereference(efx->xdp_prog) &&
new_mtu > efx_xdp_max_mtu(efx)) {
netif_err(efx, drv, efx->net_dev, "Requested MTU of %d too big for XDP (max: %d)\n",
new_mtu, efx_xdp_max_mtu(efx)); return -EINVAL;
}
netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu);
/* Run periodically off the general workqueue */ staticvoid efx_monitor(struct work_struct *data)
{ struct efx_nic *efx = container_of(data, struct efx_nic,
monitor_work.work);
netif_vdbg(efx, timer, efx->net_dev, "hardware monitor executing on CPU %d\n",
raw_smp_processor_id());
BUG_ON(efx->type->monitor == NULL);
/* If the mac_lock is already held then it is likely a port * reconfiguration is already in place, which will likely do * most of the work of monitor() anyway.
*/ if (mutex_trylock(&efx->mac_lock)) { if (efx->port_enabled && efx->type->monitor)
efx->type->monitor(efx);
mutex_unlock(&efx->mac_lock);
}
/* Restore previously fixed features in hw_features and remove * features which are fixed now
*/
efx->net_dev->hw_features |= efx->net_dev->features;
efx->net_dev->hw_features &= ~efx->fixed_features;
efx->net_dev->features |= efx->fixed_features; if (efx->net_dev->features != old_features)
netdev_features_change(efx->net_dev);
/* RX filters may also have scatter-enabled flags */ if ((efx->rx_scatter != old_rx_scatter) &&
efx->type->filter_update_rx_scatter)
efx->type->filter_update_rx_scatter(efx);
/* We must keep at least one descriptor in a TX ring empty. * We could avoid this when the queue size does not exactly * match the hardware ring size, but it's not that important. * Therefore we stop the queue when one more skb might fill * the ring completely. We wake it when half way back to * empty.
*/
efx->txq_stop_thresh = efx->txq_entries - efx_tx_max_skb_descs(efx);
efx->txq_wake_thresh = efx->txq_stop_thresh / 2;
/* Initialise the channels */
efx_start_channels(efx);
efx_ptp_start_datapath(efx);
if (netif_device_present(efx->net_dev))
netif_tx_wake_all_queues(efx->net_dev);
}
/************************************************************************** * * Port handling *
**************************************************************************/
/* Equivalent to efx_link_set_advertising with all-zeroes, except does not * force the Autoneg bit on.
*/ void efx_link_clear_advertising(struct efx_nic *efx)
{
bitmap_zero(efx->link_advertising, __ETHTOOL_LINK_MODE_MASK_NBITS);
efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX);
}
/* Ensure MAC ingress/egress is enabled */
efx_mac_reconfigure(efx, false);
mutex_unlock(&efx->mac_lock);
}
/* Cancel work for MAC reconfiguration, periodic hardware monitoring * and the async self-test, wait for them to finish and prevent them * being scheduled again. This doesn't cover online resets, which * should only be cancelled when removing the device.
*/ staticvoid efx_stop_port(struct efx_nic *efx)
{
netif_dbg(efx, ifdown, efx->net_dev, "stop port\n");
/* If the interface is supposed to be running but is not, start * the hardware and software data path, regular activity for the port * (MAC statistics, link polling, etc.) and schedule the port to be * reconfigured. Interrupts must already be enabled. This function * is safe to call multiple times, so long as the NIC is not disabled. * Requires the RTNL lock.
*/ void efx_start_all(struct efx_nic *efx)
{
EFX_ASSERT_RESET_SERIALISED(efx);
BUG_ON(efx->state == STATE_DISABLED);
/* Check that it is appropriate to restart the interface. All * of these flags are safe to read under just the rtnl lock
*/ if (efx->port_enabled || !netif_running(efx->net_dev) ||
efx->reset_pending) return;
efx_start_port(efx);
efx_start_datapath(efx);
/* Start the hardware monitor if there is one */
efx_start_monitor(efx);
efx_selftest_async_start(efx);
/* Link state detection is normally event-driven; we have * to poll now because we could have missed a change
*/
mutex_lock(&efx->mac_lock); if (efx_mcdi_phy_poll(efx))
efx_link_status_changed(efx);
mutex_unlock(&efx->mac_lock);
/* Quiesce the hardware and software data path, and regular activity * for the port without bringing the link down. Safe to call multiple * times with the NIC in almost any state, but interrupts should be * enabled. Requires the RTNL lock.
*/ void efx_stop_all(struct efx_nic *efx)
{
EFX_ASSERT_RESET_SERIALISED(efx);
/* port_enabled can be read safely under the rtnl lock */ if (!efx->port_enabled) return;
if (efx->type->update_stats) { /* update stats before we go down so we can accurately count * rx_nodesc_drops
*/
efx->type->pull_stats(efx);
spin_lock_bh(&efx->stats_lock);
efx->type->update_stats(efx, NULL, NULL);
spin_unlock_bh(&efx->stats_lock);
efx->type->stop_stats(efx);
}
efx_stop_port(efx);
/* Stop the kernel transmit interface. This is only valid if * the device is stopped or detached; otherwise the watchdog * may fire immediately.
*/
WARN_ON(netif_running(efx->net_dev) &&
netif_device_present(efx->net_dev));
netif_tx_disable(efx->net_dev);
/* Push loopback/power/transmit disable settings to the PHY, and reconfigure * the MAC appropriately. All other PHY configuration changes are pushed * through phy_op->set_settings(), and pushed asynchronously to the MAC * through efx_monitor(). * * Callers must hold the mac_lock
*/ int __efx_reconfigure_port(struct efx_nic *efx)
{ enum efx_phy_mode phy_mode; int rc = 0;
WARN_ON(!mutex_is_locked(&efx->mac_lock));
/* Disable PHY transmit in mac level loopbacks */
phy_mode = efx->phy_mode; if (LOOPBACK_INTERNAL(efx))
efx->phy_mode |= PHY_MODE_TX_DISABLED; else
efx->phy_mode &= ~PHY_MODE_TX_DISABLED;
if (efx->type->reconfigure_port)
rc = efx->type->reconfigure_port(efx);
if (rc)
efx->phy_mode = phy_mode;
return rc;
}
/************************************************************************** * * Device reset and suspend *
**************************************************************************/
staticvoid efx_wait_for_bist_end(struct efx_nic *efx)
{ int i;
for (i = 0; i < BIST_WAIT_DELAY_COUNT; ++i) { if (efx_mcdi_poll_reboot(efx)) goto out;
msleep(BIST_WAIT_DELAY_MS);
}
netif_err(efx, drv, efx->net_dev, "Warning: No MC reboot after BIST mode\n");
out: /* Either way unset the BIST flag. If we found no reboot we probably * won't recover, but we should try.
*/
efx->mc_bist_for_other_fn = false;
}
/* Try recovery mechanisms. * For now only EEH is supported. * Returns 0 if the recovery mechanisms are unsuccessful. * Returns a non-zero value otherwise.
*/ int efx_try_recovery(struct efx_nic *efx)
{ #ifdef CONFIG_EEH /* A PCI error can occur and not be seen by EEH because nothing * happens on the PCI bus. In this case the driver may fail and * schedule a 'recover or reset', leading to this recovery handler. * Manually call the eeh failure check function.
*/ struct eeh_dev *eehdev = pci_dev_to_eeh_dev(efx->pci_dev); if (eeh_dev_check_failure(eehdev)) { /* The EEH mechanisms will handle the error and reset the * device if necessary.
*/ return 1;
} #endif return 0;
}
/* Tears down the entire software state and most of the hardware state * before reset.
*/ void efx_reset_down(struct efx_nic *efx, enum reset_type method)
{
EFX_ASSERT_RESET_SERIALISED(efx);
if (method == RESET_TYPE_MCDI_TIMEOUT)
efx->type->prepare_flr(efx);
/* This function will always ensure that the locks acquired in * efx_reset_down() are released. A failure return code indicates * that we were unable to reinitialise the hardware, and the * driver should be disabled. If ok is false, then the rx and tx * engines are not restarted, pending a RESET_DISABLE.
*/ int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok)
{ int rc;
EFX_ASSERT_RESET_SERIALISED(efx);
if (method == RESET_TYPE_MCDI_TIMEOUT)
efx->type->finish_flr(efx);
/* Ensure that SRAM is initialised even if we're disabling the device */
rc = efx->type->init(efx); if (rc) {
netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n"); goto fail;
}
if (!ok) goto fail;
if (efx->port_initialized && method != RESET_TYPE_INVISIBLE &&
method != RESET_TYPE_DATAPATH) {
rc = efx_mcdi_port_reconfigure(efx); if (rc && rc != -EPERM)
netif_err(efx, drv, efx->net_dev, "could not restore PHY settings\n");
}
rc = efx_enable_interrupts(efx); if (rc) goto fail;
#ifdef CONFIG_SFC_SRIOV
rc = efx->type->vswitching_restore(efx); if (rc) /* not fatal; the PF will still work fine */
netif_warn(efx, probe, efx->net_dev, "failed to restore vswitching rc=%d;" " VFs may not function\n", rc); #endif
if (efx->type->rx_restore_rss_contexts)
efx->type->rx_restore_rss_contexts(efx);
mutex_unlock(&efx->net_dev->ethtool->rss_lock);
efx->type->filter_table_restore(efx);
up_write(&efx->filter_sem);
mutex_unlock(&efx->mac_lock);
efx_start_all(efx);
if (efx->type->udp_tnl_push_ports)
efx->type->udp_tnl_push_ports(efx);
/* Reset the NIC using the specified method. Note that the reset may * fail, in which case the card will be left in an unusable state. * * Caller must hold the rtnl_lock.
*/ int efx_reset(struct efx_nic *efx, enum reset_type method)
{ int rc, rc2 = 0; bool disabled;
efx_device_detach_sync(efx); /* efx_reset_down() grabs locks that prevent recovery on EF100. * EF100 reset is handled in the efx_nic_type callback below.
*/ if (efx_nic_rev(efx) != EFX_REV_EF100)
efx_reset_down(efx, method);
rc = efx->type->reset(efx, method); if (rc) {
netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n"); goto out;
}
/* Clear flags for the scopes we covered. We assume the NIC and * driver are now quiescent so that there is no race here.
*/ if (method < RESET_TYPE_MAX_METHOD)
efx->reset_pending &= -(1 << (method + 1)); else/* it doesn't fit into the well-ordered scope hierarchy */
__clear_bit(method, &efx->reset_pending);
/* Reinitialise bus-mastering, which may have been turned off before * the reset was scheduled. This is still appropriate, even in the * RESET_TYPE_DISABLE since this driver generally assumes the hardware * can respond to requests.
*/
pci_set_master(efx->pci_dev);
out: /* Leave device stopped if necessary */
disabled = rc ||
method == RESET_TYPE_DISABLE ||
method == RESET_TYPE_RECOVER_OR_DISABLE; if (efx_nic_rev(efx) != EFX_REV_EF100)
rc2 = efx_reset_up(efx, method, !disabled); if (rc2) {
disabled = true; if (!rc)
rc = rc2;
}
/* We checked the state in efx_schedule_reset() but it may * have changed by now. Now that we have the RTNL lock, * it cannot change again.
*/ if (efx_net_active(efx->state))
(void)efx_reset(efx, method);
switch (type) { case RESET_TYPE_INVISIBLE: case RESET_TYPE_ALL: case RESET_TYPE_RECOVER_OR_ALL: case RESET_TYPE_WORLD: case RESET_TYPE_DISABLE: case RESET_TYPE_RECOVER_OR_DISABLE: case RESET_TYPE_DATAPATH: case RESET_TYPE_MC_BIST: case RESET_TYPE_MCDI_TIMEOUT:
method = type;
netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n",
RESET_TYPE(method)); break; default:
method = efx->type->map_reset_reason(type);
netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset for %s\n",
RESET_TYPE(method), RESET_TYPE(type)); break;
}
set_bit(method, &efx->reset_pending);
smp_mb(); /* ensure we change reset_pending before checking state */
/* If we're not READY then just leave the flags set as the cue * to abort probing or reschedule the reset later.
*/ if (!efx_net_active(READ_ONCE(efx->state))) return;
/* efx_process_channel() will no longer read events once a * reset is scheduled. So switch back to poll'd MCDI completions.
*/
efx_mcdi_mode_poll(efx);
efx_queue_reset_work(efx);
}
/************************************************************************** * * Dummy NIC operations * * Can be used for some unimplemented operations * Needed so all function pointers are valid and do not have to be tested * before use *
**************************************************************************/ int efx_port_dummy_op_int(struct efx_nic *efx)
{ return 0;
} void efx_port_dummy_op_void(struct efx_nic *efx) {}
/************************************************************************** * * Data housekeeping *
**************************************************************************/
/* This zeroes out and then fills in the invariants in a struct * efx_nic (including all sub-structures).
*/ int efx_init_struct(struct efx_nic *efx, struct pci_dev *pci_dev)
{ int rc = -ENOMEM;
/* Would be good to use the net_dev name, but we're too early */
snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s",
pci_name(pci_dev));
efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); if (!efx->workqueue) {
rc = -ENOMEM; goto fail;
}
if (efx->workqueue) {
destroy_workqueue(efx->workqueue);
efx->workqueue = NULL;
}
}
/* This configures the PCI device to enable I/O and DMA. */ int efx_init_io(struct efx_nic *efx, int bar, dma_addr_t dma_mask, unsignedint mem_map_size)
{ struct pci_dev *pci_dev = efx->pci_dev; int rc;
rc = pci_enable_device(pci_dev); if (rc) {
pci_err(pci_dev, "failed to enable PCI device\n"); goto fail1;
}
pci_set_master(pci_dev);
rc = dma_set_mask_and_coherent(&pci_dev->dev, dma_mask); if (rc) {
pci_err(efx->pci_dev, "could not find a suitable DMA mask\n"); goto fail2;
}
pci_dbg(efx->pci_dev, "using DMA mask %llx\n", (unsignedlonglong)dma_mask);
efx->membase_phys = pci_resource_start(efx->pci_dev, bar); if (!efx->membase_phys) {
pci_err(efx->pci_dev, "ERROR: No BAR%d mapping from the BIOS. Try pci=realloc on the kernel command line\n",
bar);
rc = -ENODEV; goto fail3;
}
rc = pci_request_region(pci_dev, bar, "sfc"); if (rc) {
pci_err(efx->pci_dev, "request for memory BAR[%d] failed\n", bar);
rc = -EIO; goto fail3;
}
efx->mem_bar = bar;
efx->membase = ioremap(efx->membase_phys, mem_map_size); if (!efx->membase) {
pci_err(efx->pci_dev, "could not map memory BAR[%d] at %llx+%x\n", bar,
(unsignedlonglong)efx->membase_phys, mem_map_size);
rc = -ENOMEM; goto fail4;
}
pci_dbg(efx->pci_dev, "memory BAR[%d] at %llx+%x (virtual %p)\n", bar,
(unsignedlonglong)efx->membase_phys, mem_map_size,
efx->membase);
/* A PCI error affecting this device was detected. * At this point MMIO and DMA may be disabled. * Stop the software path and request a slot reset.
*/ static pci_ers_result_t efx_io_error_detected(struct pci_dev *pdev,
pci_channel_state_t state)
{
pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; struct efx_nic *efx = pci_get_drvdata(pdev);
if (state == pci_channel_io_perm_failure) return PCI_ERS_RESULT_DISCONNECT;
if (efx_net_active(efx->state)) {
efx_stop_all(efx);
efx_disable_interrupts(efx);
}
status = PCI_ERS_RESULT_NEED_RESET;
} else { /* If the interface is disabled we don't want to do anything * with it.
*/
status = PCI_ERS_RESULT_RECOVERED;
}
rtnl_unlock();
pci_disable_device(pdev);
return status;
}
/* Fake a successful reset, which will be performed later in efx_io_resume. */ static pci_ers_result_t efx_io_slot_reset(struct pci_dev *pdev)
{ struct efx_nic *efx = pci_get_drvdata(pdev);
pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
if (pci_enable_device(pdev)) {
netif_err(efx, hw, efx->net_dev, "Cannot re-enable PCI device after reset.\n");
status = PCI_ERS_RESULT_DISCONNECT;
}
return status;
}
/* Perform the actual reset and resume I/O operations. */ staticvoid efx_io_resume(struct pci_dev *pdev)
{ struct efx_nic *efx = pci_get_drvdata(pdev); int rc;
rtnl_lock();
if (efx->state == STATE_DISABLED) goto out;
rc = efx_reset(efx, RESET_TYPE_ALL); if (rc) {
netif_err(efx, hw, efx->net_dev, "efx_reset failed after PCI error (%d)\n", rc);
} else {
efx->state = efx_recovered(efx->state);
netif_dbg(efx, hw, efx->net_dev, "Done resetting and resuming IO after PCI error.\n");
}
out:
rtnl_unlock();
}
/* For simplicity and reliability, we always require a slot reset and try to * reset the hardware when a pci error affecting the device is detected. * We leave both the link_reset and mmio_enabled callback unimplemented: * with our request for slot reset the mmio_enabled callback will never be * called, and the link_reset callback is not used by AER or EEH mechanisms.
*/ conststruct pci_error_handlers efx_err_handlers = {
.error_detected = efx_io_error_detected,
.slot_reset = efx_io_slot_reset,
.resume = efx_io_resume,
};
/* Determine whether the NIC will be able to handle TX offloads for a given * encapsulated packet.
*/ staticbool efx_can_encap_offloads(struct efx_nic *efx, struct sk_buff *skb)
{ struct gre_base_hdr *greh;
__be16 dst_port;
u8 ipproto;
/* Does the NIC support encap offloads? * If not, we should never get here, because we shouldn't have * advertised encap offload feature flags in the first place.
*/ if (WARN_ON_ONCE(!efx->type->udp_tnl_has_port)) returnfalse;
/* Determine encapsulation protocol in use */ switch (skb->protocol) { case htons(ETH_P_IP):
ipproto = ip_hdr(skb)->protocol; break; case htons(ETH_P_IPV6): /* If there are extension headers, this will cause us to * think we can't offload something that we maybe could have.
*/
ipproto = ipv6_hdr(skb)->nexthdr; break; default: /* Not IP, so can't offload it */ returnfalse;
} switch (ipproto) { case IPPROTO_GRE: /* We support NVGRE but not IP over GRE or random gretaps. * Specifically, the NIC will accept GRE as encapsulated if * the inner protocol is Ethernet, but only handle it * correctly if the GRE header is 8 bytes long. Moreover, * it will not update the Checksum or Sequence Number fields * if they are present. (The Routing Present flag, * GRE_ROUTING, cannot be set else the header would be more * than 8 bytes long; so we don't have to worry about it.)
*/ if (skb->inner_protocol_type != ENCAP_TYPE_ETHER) returnfalse; if (ntohs(skb->inner_protocol) != ETH_P_TEB) returnfalse; if (skb_inner_mac_header(skb) - skb_transport_header(skb) != 8) returnfalse;
greh = (struct gre_base_hdr *)skb_transport_header(skb); return !(greh->flags & (GRE_CSUM | GRE_SEQ)); case IPPROTO_UDP: /* If the port is registered for a UDP tunnel, we assume the * packet is for that tunnel, and the NIC will handle it as * such. If not, the NIC won't know what to do with it.
*/
dst_port = udp_hdr(skb)->dest; return efx->type->udp_tnl_has_port(efx, dst_port); default: returnfalse;
}
}
if (skb->encapsulation) { if (features & NETIF_F_GSO_MASK) /* Hardware can only do TSO with at most 208 bytes * of headers.
*/ if (skb_inner_transport_offset(skb) >
EFX_TSO2_MAX_HDRLEN)
features &= ~(NETIF_F_GSO_MASK); if (features & (NETIF_F_GSO_MASK | NETIF_F_CSUM_MASK)) if (!efx_can_encap_offloads(efx, skb))
features &= ~(NETIF_F_GSO_MASK |
NETIF_F_CSUM_MASK);
} return features;
}
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