#include "aq_main.h"
#include "aq_nic.h"
#include "aq_pci_func.h"
#include "aq_ethtool.h"
#include "aq_ptp.h"
#include "aq_filters.h"
#include "aq_hw_utils.h"
#include "aq_vec.h"
#include <linux/netdevice.h>
#include <linux/module.h>
#include <linux/ip.h>
#include <linux/udp.h>
#include <net/pkt_cls.h>
#include <net/pkt_sched.h>
#include <linux/filter.h>
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR(AQ_CFG_DRV_AUTHOR);
MODULE_DESCRIPTION(AQ_CFG_DRV_DESC);
DEFINE_STATIC_KEY_FALSE(aq_xdp_locking_key);
EXPORT_SYMBOL(aq_xdp_locking_key);
static const char aq_ndev_driver_name[] = AQ_CFG_DRV_NAME;
static const struct net_device_ops aq_ndev_ops;
static struct workqueue_struct *aq_ndev_wq;
void aq_ndev_schedule_work(struct work_struct *work)
{
queue_work(aq_ndev_wq, work);
}
struct net_device *aq_ndev_alloc(void)
{
struct net_device *ndev = NULL;
struct aq_nic_s *aq_nic = NULL;
ndev = alloc_etherdev_mq(sizeof(struct aq_nic_s), AQ_HW_QUEUES_MAX);
if (!ndev)
return NULL;
aq_nic = netdev_priv(ndev);
aq_nic->ndev = ndev;
ndev->netdev_ops = &aq_ndev_ops;
ndev->ethtool_ops = &aq_ethtool_ops;
return ndev;
}
int aq_ndev_open(struct net_device *ndev)
{
struct aq_nic_s *aq_nic = netdev_priv(ndev);
int err = 0;
err = aq_nic_init(aq_nic);
if (err < 0)
goto err_exit;
err = aq_reapply_rxnfc_all_rules(aq_nic);
if (err < 0)
goto err_exit;
err = aq_filters_vlans_update(aq_nic);
if (err < 0)
goto err_exit;
err = aq_nic_start(aq_nic);
if (err < 0) {
aq_nic_stop(aq_nic);
goto err_exit;
}
err_exit:
if (err < 0)
aq_nic_deinit(aq_nic, true);
return err;
}
int aq_ndev_close(struct net_device *ndev)
{
struct aq_nic_s *aq_nic = netdev_priv(ndev);
int err = 0;
err = aq_nic_stop(aq_nic);
aq_nic_deinit(aq_nic, true);
return err;
}
static netdev_tx_t aq_ndev_start_xmit(struct sk_buff *skb, struct net_device *ndev)
{
struct aq_nic_s *aq_nic = netdev_priv(ndev);
#if IS_REACHABLE(CONFIG_PTP_1588_CLOCK)
if (unlikely(aq_utils_obj_test(&aq_nic->flags, AQ_NIC_PTP_DPATH_UP))) {
if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) ||
unlikely((ip_hdr(skb)->version == 4) &&
(ip_hdr(skb)->protocol == IPPROTO_UDP) &&
((udp_hdr(skb)->dest == htons(319)) ||
(udp_hdr(skb)->dest == htons(320)))) ||
unlikely(eth_hdr(skb)->h_proto == htons(ETH_P_1588)))
return aq_ptp_xmit(aq_nic, skb);
}
#endif
return aq_nic_xmit(aq_nic, skb);
}
static int aq_ndev_change_mtu(struct net_device *ndev, int new_mtu)
{
int new_frame_size = new_mtu + ETH_HLEN + ETH_FCS_LEN;
struct aq_nic_s *aq_nic = netdev_priv(ndev);
struct bpf_prog *prog;
int err;
prog = READ_ONCE(aq_nic->xdp_prog);
if (prog && !prog->aux->xdp_has_frags &&
new_frame_size > AQ_CFG_RX_FRAME_MAX) {
netdev_err(ndev, "Illegal MTU %d for XDP prog without frags\n",
ndev->mtu);
return -EOPNOTSUPP;
}
err = aq_nic_set_mtu(aq_nic, new_mtu + ETH_HLEN);
if (err < 0)
goto err_exit;
WRITE_ONCE(ndev->mtu, new_mtu);
err_exit:
return err;
}
static int aq_ndev_set_features(struct net_device *ndev,
netdev_features_t features)
{
bool is_vlan_tx_insert = !!(features & NETIF_F_HW_VLAN_CTAG_TX);
bool is_vlan_rx_strip = !!(features & NETIF_F_HW_VLAN_CTAG_RX);
struct aq_nic_s *aq_nic = netdev_priv(ndev);
bool need_ndev_restart = false;
struct aq_nic_cfg_s *aq_cfg;
bool is_lro = false;
int err = 0;
aq_cfg = aq_nic_get_cfg(aq_nic);
if (!(features & NETIF_F_NTUPLE)) {
if (aq_nic->ndev->features & NETIF_F_NTUPLE) {
err = aq_clear_rxnfc_all_rules(aq_nic);
if (unlikely(err))
goto err_exit;
}
}
if (!(features & NETIF_F_HW_VLAN_CTAG_FILTER)) {
if (aq_nic->ndev->features & NETIF_F_HW_VLAN_CTAG_FILTER) {
err = aq_filters_vlan_offload_off(aq_nic);
if (unlikely(err))
goto err_exit;
}
}
aq_cfg->features = features;
if (aq_cfg->aq_hw_caps->hw_features & NETIF_F_LRO) {
is_lro = features & NETIF_F_LRO;
if (aq_cfg->is_lro != is_lro) {
aq_cfg->is_lro = is_lro;
need_ndev_restart = true;
}
}
if ((aq_nic->ndev->features ^ features) & NETIF_F_RXCSUM) {
err = aq_nic->aq_hw_ops->hw_set_offload(aq_nic->aq_hw,
aq_cfg);
if (unlikely(err))
goto err_exit;
}
if (aq_cfg->is_vlan_rx_strip != is_vlan_rx_strip) {
aq_cfg->is_vlan_rx_strip = is_vlan_rx_strip;
need_ndev_restart = true;
}
if (aq_cfg->is_vlan_tx_insert != is_vlan_tx_insert) {
aq_cfg->is_vlan_tx_insert = is_vlan_tx_insert;
need_ndev_restart = true;
}
if (need_ndev_restart && netif_running(ndev)) {
aq_ndev_close(ndev);
aq_ndev_open(ndev);
}
err_exit:
return err;
}
static netdev_features_t aq_ndev_fix_features(struct net_device *ndev,
netdev_features_t features)
{
struct aq_nic_s *aq_nic = netdev_priv(ndev);
struct bpf_prog *prog;
if (!(features & NETIF_F_RXCSUM))
features &= ~NETIF_F_LRO;
prog = READ_ONCE(aq_nic->xdp_prog);
if (prog && !prog->aux->xdp_has_frags &&
aq_nic->xdp_prog && features & NETIF_F_LRO) {
netdev_err(ndev, "LRO is not supported with single buffer XDP, disabling\n");
features &= ~NETIF_F_LRO;
}
return features;
}
static int aq_ndev_set_mac_address(struct net_device *ndev, void *addr)
{
struct aq_nic_s *aq_nic = netdev_priv(ndev);
int err = 0;
err = eth_mac_addr(ndev, addr);
if (err < 0)
goto err_exit;
err = aq_nic_set_mac(aq_nic, ndev);
if (err < 0)
goto err_exit;
err_exit:
return err;
}
static void aq_ndev_set_multicast_settings(struct net_device *ndev)
{
struct aq_nic_s *aq_nic = netdev_priv(ndev);
(void)aq_nic_set_multicast_list(aq_nic, ndev);
}
static int aq_ndev_hwtstamp_set(struct net_device *netdev,
struct kernel_hwtstamp_config *config,
struct netlink_ext_ack *extack)
{
struct aq_nic_s *aq_nic = netdev_priv(netdev);
if (!IS_REACHABLE(CONFIG_PTP_1588_CLOCK) || !aq_nic->aq_ptp)
return -EOPNOTSUPP;
switch (config->tx_type) {
case HWTSTAMP_TX_OFF:
case HWTSTAMP_TX_ON:
break;
default:
return -ERANGE;
}
switch (config->rx_filter) {
case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
break;
case HWTSTAMP_FILTER_PTP_V2_EVENT:
case HWTSTAMP_FILTER_NONE:
break;
default:
return -ERANGE;
}
return aq_ptp_hwtstamp_config_set(aq_nic->aq_ptp, config);
}
static int aq_ndev_hwtstamp_get(struct net_device *netdev,
struct kernel_hwtstamp_config *config)
{
struct aq_nic_s *aq_nic = netdev_priv(netdev);
if (!aq_nic->aq_ptp)
return -EOPNOTSUPP;
aq_ptp_hwtstamp_config_get(aq_nic->aq_ptp, config);
return 0;
}
static int aq_ndo_vlan_rx_add_vid(struct net_device *ndev, __be16 proto,
u16 vid)
{
struct aq_nic_s *aq_nic = netdev_priv(ndev);
if (!aq_nic->aq_hw_ops->hw_filter_vlan_set)
return -EOPNOTSUPP;
set_bit(vid, aq_nic->active_vlans);
return aq_filters_vlans_update(aq_nic);
}
static int aq_ndo_vlan_rx_kill_vid(struct net_device *ndev, __be16 proto,
u16 vid)
{
struct aq_nic_s *aq_nic = netdev_priv(ndev);
if (!aq_nic->aq_hw_ops->hw_filter_vlan_set)
return -EOPNOTSUPP;
clear_bit(vid, aq_nic->active_vlans);
if (-ENOENT == aq_del_fvlan_by_vlan(aq_nic, vid))
return aq_filters_vlans_update(aq_nic);
return 0;
}
static int aq_validate_mqprio_opt(struct aq_nic_s *self,
struct tc_mqprio_qopt_offload *mqprio,
const unsigned int num_tc)
{
const bool has_min_rate = !!(mqprio->flags & TC_MQPRIO_F_MIN_RATE);
struct aq_nic_cfg_s *aq_nic_cfg = aq_nic_get_cfg(self);
const unsigned int tcs_max = min_t(u8, aq_nic_cfg->aq_hw_caps->tcs_max,
AQ_CFG_TCS_MAX);
if (num_tc > tcs_max) {
netdev_err(self->ndev, "Too many TCs requested\n");
return -EOPNOTSUPP;
}
if (num_tc != 0 && !is_power_of_2(num_tc)) {
netdev_err(self->ndev, "TC count should be power of 2\n");
return -EOPNOTSUPP;
}
if (has_min_rate && !ATL_HW_IS_CHIP_FEATURE(self->aq_hw, ANTIGUA)) {
netdev_err(self->ndev, "Min tx rate is not supported\n");
return -EOPNOTSUPP;
}
return 0;
}
static int aq_ndo_setup_tc(struct net_device *dev, enum tc_setup_type type,
void *type_data)
{
struct tc_mqprio_qopt_offload *mqprio = type_data;
struct aq_nic_s *aq_nic = netdev_priv(dev);
bool has_min_rate;
bool has_max_rate;
int err;
int i;
if (type != TC_SETUP_QDISC_MQPRIO)
return -EOPNOTSUPP;
has_min_rate = !!(mqprio->flags & TC_MQPRIO_F_MIN_RATE);
has_max_rate = !!(mqprio->flags & TC_MQPRIO_F_MAX_RATE);
err = aq_validate_mqprio_opt(aq_nic, mqprio, mqprio->qopt.num_tc);
if (err)
return err;
for (i = 0; i < mqprio->qopt.num_tc; i++) {
if (has_max_rate) {
u64 max_rate = mqprio->max_rate[i];
do_div(max_rate, AQ_MBPS_DIVISOR);
aq_nic_setup_tc_max_rate(aq_nic, i, (u32)max_rate);
}
if (has_min_rate) {
u64 min_rate = mqprio->min_rate[i];
do_div(min_rate, AQ_MBPS_DIVISOR);
aq_nic_setup_tc_min_rate(aq_nic, i, (u32)min_rate);
}
}
return aq_nic_setup_tc_mqprio(aq_nic, mqprio->qopt.num_tc,
mqprio->qopt.prio_tc_map);
}
static int aq_xdp_setup(struct net_device *ndev, struct bpf_prog *prog,
struct netlink_ext_ack *extack)
{
bool need_update, running = netif_running(ndev);
struct aq_nic_s *aq_nic = netdev_priv(ndev);
struct bpf_prog *old_prog;
if (prog && !prog->aux->xdp_has_frags) {
if (ndev->mtu > AQ_CFG_RX_FRAME_MAX) {
NL_SET_ERR_MSG_MOD(extack,
"prog does not support XDP frags");
return -EOPNOTSUPP;
}
if (prog && ndev->features & NETIF_F_LRO) {
netdev_err(ndev,
"LRO is not supported with single buffer XDP, disabling\n");
ndev->features &= ~NETIF_F_LRO;
}
}
need_update = !!aq_nic->xdp_prog != !!prog;
if (running && need_update)
aq_ndev_close(ndev);
old_prog = xchg(&aq_nic->xdp_prog, prog);
if (old_prog)
bpf_prog_put(old_prog);
if (!old_prog && prog)
static_branch_inc(&aq_xdp_locking_key);
else if (old_prog && !prog)
static_branch_dec(&aq_xdp_locking_key);
if (running && need_update)
return aq_ndev_open(ndev);
return 0;
}
static int aq_xdp(struct net_device *dev, struct netdev_bpf *xdp)
{
switch (xdp->command) {
case XDP_SETUP_PROG:
return aq_xdp_setup(dev, xdp->prog, xdp->extack);
default:
return -EINVAL;
}
}
static const struct net_device_ops aq_ndev_ops = {
.ndo_open = aq_ndev_open,
.ndo_stop = aq_ndev_close,
.ndo_start_xmit = aq_ndev_start_xmit,
.ndo_set_rx_mode = aq_ndev_set_multicast_settings,
.ndo_change_mtu = aq_ndev_change_mtu,
.ndo_set_mac_address = aq_ndev_set_mac_address,
.ndo_set_features = aq_ndev_set_features,
.ndo_fix_features = aq_ndev_fix_features,
.ndo_vlan_rx_add_vid = aq_ndo_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = aq_ndo_vlan_rx_kill_vid,
.ndo_setup_tc = aq_ndo_setup_tc,
.ndo_bpf = aq_xdp,
.ndo_xdp_xmit = aq_xdp_xmit,
.ndo_hwtstamp_get = aq_ndev_hwtstamp_get,
.ndo_hwtstamp_set = aq_ndev_hwtstamp_set,
};
static int __init aq_ndev_init_module(void)
{
int ret;
aq_ndev_wq = create_singlethread_workqueue(aq_ndev_driver_name);
if (!aq_ndev_wq) {
pr_err("Failed to create workqueue\n");
return -ENOMEM;
}
ret = aq_pci_func_register_driver();
if (ret) {
destroy_workqueue(aq_ndev_wq);
return ret;
}
return 0;
}
static void __exit aq_ndev_exit_module(void)
{
aq_pci_func_unregister_driver();
if (aq_ndev_wq) {
destroy_workqueue(aq_ndev_wq);
aq_ndev_wq = NULL;
}
}
module_init(aq_ndev_init_module);
module_exit(aq_ndev_exit_module);
