// SPDX-License-Identifier: GPL-2.0-only
/****************************************************************************
* Driver for Solarflare network controllers and boards
* Copyright 2018 Solarflare Communications Inc.
* Copyright 2019-2020 Xilinx 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.
*/
#include "net_driver.h"
#include "mcdi_port_common.h"
#include "mcdi_functions.h"
#include "efx_common.h"
#include "efx_channels.h"
#include "tx_common.h"
#include "ef100_netdev.h"
#include "ef100_ethtool.h"
#include "nic_common.h"
#include "ef100_nic.h"
#include "ef100_tx.h"
#include "ef100_regs.h"
#include "mcdi_filters.h"
#include "rx_common.h"
#include "ef100_sriov.h"
#include "tc_bindings.h"
#include "tc_encap_actions.h"
#include "efx_devlink.h"
static void ef100_update_name(struct efx_nic *efx)
{
strcpy(efx->name, efx->net_dev->name);
}
static int ef100_alloc_vis(struct efx_nic *efx, unsigned int *allocated_vis)
{
/* EF100 uses a single TXQ per channel, as all checksum offloading
* is configured in the TX descriptor, and there is no TX Pacer for
* HIGHPRI queues.
*/
unsigned int tx_vis = efx->n_tx_channels + efx->n_extra_tx_channels;
unsigned int rx_vis = efx->n_rx_channels;
unsigned int min_vis, max_vis;
int rc;
EFX_WARN_ON_PARANOID(efx->tx_queues_per_channel != 1);
tx_vis += efx->n_xdp_channels * efx->xdp_tx_per_channel;
max_vis = max(rx_vis, tx_vis);
/* We require at least a single complete TX channel worth of queues. */
min_vis = efx->tx_queues_per_channel;
rc = efx_mcdi_alloc_vis(efx, min_vis, max_vis,
NULL, allocated_vis);
/* We retry allocating VIs by reallocating channels when we have not
* been able to allocate the maximum VIs.
*/
if (!rc && *allocated_vis < max_vis)
rc = -EAGAIN;
return rc;
}
static int ef100_remap_bar(struct efx_nic *efx, int max_vis)
{
unsigned int uc_mem_map_size;
void __iomem *membase;
efx->max_vis = max_vis;
uc_mem_map_size = PAGE_ALIGN(max_vis * efx->vi_stride);
/* Extend the original UC mapping of the memory BAR */
membase = ioremap(efx->membase_phys, uc_mem_map_size);
if (!membase) {
netif_err(efx, probe, efx->net_dev,
"could not extend memory BAR to %x\n",
uc_mem_map_size);
return -ENOMEM;
}
iounmap(efx->membase);
efx->membase = membase;
return 0;
}
/* Context: process, rtnl_lock() held.
* Note that the kernel will ignore our return code; this method
* should really be a void.
*/
static int ef100_net_stop(struct net_device *net_dev)
{
struct efx_nic *efx = efx_netdev_priv(net_dev);
netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",
raw_smp_processor_id());
efx_detach_reps(efx);
netif_stop_queue(net_dev);
efx_stop_all(efx);
efx_mcdi_mac_fini_stats(efx);
efx_disable_interrupts(efx);
efx_clear_interrupt_affinity(efx);
efx_nic_fini_interrupt(efx);
efx_remove_filters(efx);
efx_fini_napi(efx);
efx_remove_channels(efx);
efx_mcdi_free_vis(efx);
efx_remove_interrupts(efx);
efx->state = STATE_NET_DOWN;
return 0;
}
/* Context: process, rtnl_lock() held. */
static int ef100_net_open(struct net_device *net_dev)
{
struct efx_nic *efx = efx_netdev_priv(net_dev);
unsigned int allocated_vis;
int rc;
ef100_update_name(efx);
netif_dbg(efx, ifup, net_dev, "opening device on CPU %d\n",
raw_smp_processor_id());
rc = efx_check_disabled(efx);
if (rc)
goto fail;
rc = efx_probe_interrupts(efx);
if (rc)
goto fail;
rc = efx_set_channels(efx);
if (rc)
goto fail;
rc = efx_mcdi_free_vis(efx);
if (rc)
goto fail;
rc = ef100_alloc_vis(efx, &allocated_vis);
if (rc && rc != -EAGAIN)
goto fail;
/* Try one more time but with the maximum number of channels
* equal to the allocated VIs, which would more likely succeed.
*/
if (rc == -EAGAIN) {
rc = efx_mcdi_free_vis(efx);
if (rc)
goto fail;
efx_remove_interrupts(efx);
efx->max_channels = allocated_vis;
rc = efx_probe_interrupts(efx);
if (rc)
goto fail;
rc = efx_set_channels(efx);
if (rc)
goto fail;
rc = ef100_alloc_vis(efx, &allocated_vis);
if (rc && rc != -EAGAIN)
goto fail;
/* It should be very unlikely that we failed here again, but in
* such a case we return ENOSPC.
*/
if (rc == -EAGAIN) {
rc = -ENOSPC;
goto fail;
}
}
rc = efx_probe_channels(efx);
if (rc)
return rc;
rc = ef100_remap_bar(efx, allocated_vis);
if (rc)
goto fail;
efx_init_napi(efx);
rc = efx_probe_filters(efx);
if (rc)
goto fail;
rc = efx_nic_init_interrupt(efx);
if (rc)
goto fail;
efx_set_interrupt_affinity(efx);
rc = efx_enable_interrupts(efx);
if (rc)
goto fail;
/* in case the MC rebooted while we were stopped, consume the change
* to the warm reboot count
*/
(void) efx_mcdi_poll_reboot(efx);
rc = efx_mcdi_mac_init_stats(efx);
if (rc)
goto fail;
efx_start_all(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);
efx->state = STATE_NET_UP;
if (netif_running(efx->net_dev))
efx_attach_reps(efx);
return 0;
fail:
ef100_net_stop(net_dev);
return rc;
}
/* Initiate a packet transmission. We use one channel per CPU
* (sharing when we have more CPUs than channels).
*
* Context: non-blocking.
* Note that returning anything other than NETDEV_TX_OK will cause the
* OS to free the skb.
*/
static netdev_tx_t ef100_hard_start_xmit(struct sk_buff *skb,
struct net_device *net_dev)
{
struct efx_nic *efx = efx_netdev_priv(net_dev);
return __ef100_hard_start_xmit(skb, efx, net_dev, NULL);
}
netdev_tx_t __ef100_hard_start_xmit(struct sk_buff *skb,
struct efx_nic *efx,
struct net_device *net_dev,
struct efx_rep *efv)
{
struct efx_tx_queue *tx_queue;
struct efx_channel *channel;
int rc;
channel = efx_get_tx_channel(efx, skb_get_queue_mapping(skb));
netif_vdbg(efx, tx_queued, efx->net_dev,
"%s len %d data %d channel %d\n", __func__,
skb->len, skb->data_len, channel->channel);
if (!efx->n_channels || !efx->n_tx_channels || !channel) {
netif_stop_queue(net_dev);
dev_kfree_skb_any(skb);
goto err;
}
tx_queue = &channel->tx_queue[0];
rc = __ef100_enqueue_skb(tx_queue, skb, efv);
if (rc == 0)
return NETDEV_TX_OK;
err:
net_dev->stats.tx_dropped++;
return NETDEV_TX_OK;
}
static const struct net_device_ops ef100_netdev_ops = {
.ndo_open = ef100_net_open,
.ndo_stop = ef100_net_stop,
.ndo_start_xmit = ef100_hard_start_xmit,
.ndo_tx_timeout = efx_watchdog,
.ndo_get_stats64 = efx_net_stats,
.ndo_change_mtu = efx_change_mtu,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = efx_set_mac_address,
.ndo_set_rx_mode = efx_set_rx_mode, /* Lookout */
.ndo_set_features = efx_set_features,
.ndo_get_phys_port_id = efx_get_phys_port_id,
.ndo_get_phys_port_name = efx_get_phys_port_name,
#ifdef CONFIG_RFS_ACCEL
.ndo_rx_flow_steer = efx_filter_rfs,
#endif
#ifdef CONFIG_SFC_SRIOV
.ndo_setup_tc = efx_tc_setup,
#endif
};
/* Netdev registration
*/
int ef100_netdev_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct efx_nic *efx = container_of(this, struct efx_nic, netdev_notifier);
struct net_device *net_dev = netdev_notifier_info_to_dev(ptr);
struct ef100_nic_data *nic_data = efx->nic_data;
int err;
if (efx->net_dev == net_dev &&
(event == NETDEV_CHANGENAME || event == NETDEV_REGISTER))
ef100_update_name(efx);
if (!nic_data->grp_mae)
return NOTIFY_DONE;
err = efx_tc_netdev_event(efx, event, net_dev);
if (err & NOTIFY_STOP_MASK)
return err;
return NOTIFY_DONE;
}
static int ef100_netevent_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct efx_nic *efx = container_of(this, struct efx_nic, netevent_notifier);
struct ef100_nic_data *nic_data = efx->nic_data;
int err;
if (!nic_data->grp_mae)
return NOTIFY_DONE;
err = efx_tc_netevent_event(efx, event, ptr);
if (err & NOTIFY_STOP_MASK)
return err;
return NOTIFY_DONE;
};
static int ef100_register_netdev(struct efx_nic *efx)
{
struct net_device *net_dev = efx->net_dev;
int rc;
net_dev->watchdog_timeo = 5 * HZ;
net_dev->irq = efx->pci_dev->irq;
net_dev->netdev_ops = &ef100_netdev_ops;
net_dev->min_mtu = EFX_MIN_MTU;
net_dev->max_mtu = EFX_MAX_MTU;
net_dev->ethtool_ops = &ef100_ethtool_ops;
rtnl_lock();
rc = dev_alloc_name(net_dev, net_dev->name);
if (rc < 0)
goto fail_locked;
ef100_update_name(efx);
rc = register_netdevice(net_dev);
if (rc)
goto fail_locked;
/* Always start with carrier off; PHY events will detect the link */
netif_carrier_off(net_dev);
efx->state = STATE_NET_DOWN;
rtnl_unlock();
efx_init_mcdi_logging(efx);
return 0;
fail_locked:
rtnl_unlock();
netif_err(efx, drv, efx->net_dev, "could not register net dev\n");
return rc;
}
static void ef100_unregister_netdev(struct efx_nic *efx)
{
if (efx_dev_registered(efx)) {
efx_fini_mcdi_logging(efx);
efx->state = STATE_PROBED;
unregister_netdev(efx->net_dev);
}
}
void ef100_remove_netdev(struct efx_probe_data *probe_data)
{
struct efx_nic *efx = &probe_data->efx;
if (!efx->net_dev)
return;
rtnl_lock();
dev_close(efx->net_dev);
rtnl_unlock();
unregister_netdevice_notifier(&efx->netdev_notifier);
unregister_netevent_notifier(&efx->netevent_notifier);
#if defined(CONFIG_SFC_SRIOV)
if (!efx->type->is_vf)
efx_ef100_pci_sriov_disable(efx, true);
#endif
efx_fini_devlink_lock(efx);
ef100_unregister_netdev(efx);
#ifdef CONFIG_SFC_SRIOV
ef100_pf_unset_devlink_port(efx);
efx_fini_tc(efx);
#endif
down_write(&efx->filter_sem);
efx_mcdi_filter_table_remove(efx);
up_write(&efx->filter_sem);
efx_fini_channels(efx);
kfree(efx->phy_data);
efx->phy_data = NULL;
efx_fini_devlink_and_unlock(efx);
free_netdev(efx->net_dev);
efx->net_dev = NULL;
efx->state = STATE_PROBED;
}
int ef100_probe_netdev(struct efx_probe_data *probe_data)
{
struct efx_nic *efx = &probe_data->efx;
struct efx_probe_data **probe_ptr;
struct ef100_nic_data *nic_data;
struct net_device *net_dev;
int rc;
if (efx->mcdi->fn_flags &
(1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_NO_ACTIVE_PORT)) {
pci_info(efx->pci_dev, "No network port on this PCI function");
return 0;
}
/* Allocate and initialise a struct net_device */
net_dev = alloc_etherdev_mq(sizeof(probe_data), EFX_MAX_CORE_TX_QUEUES);
if (!net_dev)
return -ENOMEM;
probe_ptr = netdev_priv(net_dev);
*probe_ptr = probe_data;
efx->net_dev = net_dev;
SET_NETDEV_DEV(net_dev, &efx->pci_dev->dev);
/* enable all supported features except rx-fcs and rx-all */
net_dev->features |= efx->type->offload_features &
~(NETIF_F_RXFCS | NETIF_F_RXALL);
net_dev->hw_features |= efx->type->offload_features;
net_dev->hw_enc_features |= efx->type->offload_features;
net_dev->vlan_features |= NETIF_F_HW_CSUM | NETIF_F_SG |
NETIF_F_HIGHDMA | NETIF_F_ALL_TSO;
netif_set_tso_max_segs(net_dev,
ESE_EF100_DP_GZ_TSO_MAX_HDR_NUM_SEGS_DEFAULT);
efx->mdio.dev = net_dev;
rc = efx_ef100_init_datapath_caps(efx);
if (rc < 0)
goto fail;
rc = ef100_phy_probe(efx);
if (rc)
goto fail;
rc = efx_init_channels(efx);
if (rc)
goto fail;
down_write(&efx->filter_sem);
rc = ef100_filter_table_probe(efx);
up_write(&efx->filter_sem);
if (rc)
goto fail;
netdev_rss_key_fill(efx->rss_context.rx_hash_key,
sizeof(efx->rss_context.rx_hash_key));
/* Don't fail init if RSS setup doesn't work. */
efx_mcdi_push_default_indir_table(efx, efx->n_rx_channels);
nic_data = efx->nic_data;
rc = ef100_get_mac_address(efx, net_dev->perm_addr, CLIENT_HANDLE_SELF,
efx->type->is_vf);
if (rc)
return rc;
/* Assign MAC address */
eth_hw_addr_set(net_dev, net_dev->perm_addr);
ether_addr_copy(nic_data->port_id, net_dev->perm_addr);
/* devlink creation, registration and lock */
rc = efx_probe_devlink_and_lock(efx);
if (rc)
pci_info(efx->pci_dev, "devlink registration failed");
rc = ef100_register_netdev(efx);
if (rc)
goto fail;
if (!efx->type->is_vf) {
rc = ef100_probe_netdev_pf(efx);
if (rc)
goto fail;
#ifdef CONFIG_SFC_SRIOV
ef100_pf_set_devlink_port(efx);
#endif
}
efx->netdev_notifier.notifier_call = ef100_netdev_event;
rc = register_netdevice_notifier(&efx->netdev_notifier);
if (rc) {
netif_err(efx, probe, efx->net_dev,
"Failed to register netdevice notifier, rc=%d\n", rc);
goto fail;
}
efx->netevent_notifier.notifier_call = ef100_netevent_event;
rc = register_netevent_notifier(&efx->netevent_notifier);
if (rc) {
netif_err(efx, probe, efx->net_dev,
"Failed to register netevent notifier, rc=%d\n", rc);
goto fail;
}
efx_probe_devlink_unlock(efx);
return rc;
fail:
#ifdef CONFIG_SFC_SRIOV
/* remove devlink port if does exist */
ef100_pf_unset_devlink_port(efx);
#endif
efx_probe_devlink_unlock(efx);
return rc;
}
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