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/*
* Copyright (c) 2012-2017 Qualcomm Atheros, Inc.
* Copyright (c) 2018, The Linux Foundation. All rights reserved.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <linux/etherdevice.h>
#include <linux/rtnetlink.h>
#include "wil6210.h"
#include "txrx.h"
bool wil_has_other_up_ifaces(struct wil6210_priv *wil,
struct net_device *ndev)
{
int i;
struct wil6210_vif *vif;
struct net_device *ndev_i;
for (i = 0; i < wil->max_vifs; i++) {
vif = wil->vifs[i];
if (vif) {
ndev_i = vif_to_ndev(vif);
if (ndev_i != ndev && ndev_i->flags & IFF_UP)
return true;
}
}
return false;
}
bool wil_has_up_ifaces(struct wil6210_priv *wil)
{
return wil_has_other_up_ifaces(wil, NULL);
}
static int wil_open(struct net_device *ndev)
{
struct wil6210_priv *wil = ndev_to_wil(ndev);
int rc = 0;
wil_dbg_misc(wil, "open\n");
if (debug_fw ||
test_bit(WMI_FW_CAPABILITY_WMI_ONLY, wil->fw_capabilities)) {
wil_err(wil, "while in debug_fw or wmi_only mode\n");
return -EINVAL;
}
if (!wil_has_other_up_ifaces(wil, ndev)) {
wil_dbg_misc(wil, "open, first iface\n");
rc = wil_pm_runtime_get(wil);
if (rc < 0)
return rc;
rc = wil_up(wil);
if (rc)
wil_pm_runtime_put(wil);
}
return rc;
}
static int wil_stop(struct net_device *ndev)
{
struct wil6210_priv *wil = ndev_to_wil(ndev);
int rc = 0;
wil_dbg_misc(wil, "stop\n");
if (!wil_has_other_up_ifaces(wil, ndev)) {
wil_dbg_misc(wil, "stop, last iface\n");
rc = wil_down(wil);
if (!rc)
wil_pm_runtime_put(wil);
}
return rc;
}
static const struct net_device_ops wil_netdev_ops = {
.ndo_open = wil_open,
.ndo_stop = wil_stop,
.ndo_start_xmit = wil_start_xmit,
.ndo_set_mac_address = eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
};
static int wil6210_netdev_poll_rx(struct napi_struct *napi, int budget)
{
struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
napi_rx);
int quota = budget;
int done;
wil_rx_handle(wil, "a);
done = budget - quota;
if (done < budget) {
napi_complete_done(napi, done);
wil6210_unmask_irq_rx(wil);
wil_dbg_txrx(wil, "NAPI RX complete\n");
}
wil_dbg_txrx(wil, "NAPI RX poll(%d) done %d\n", budget, done);
return done;
}
static int wil6210_netdev_poll_tx(struct napi_struct *napi, int budget)
{
struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
napi_tx);
int tx_done = 0;
uint i;
/* always process ALL Tx complete, regardless budget - it is fast */
for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
struct vring *vring = &wil->vring_tx[i];
struct vring_tx_data *txdata = &wil->vring_tx_data[i];
if (!vring->va || !txdata->enabled)
continue;
tx_done += wil_tx_complete(wil, i);
}
if (tx_done < budget) {
napi_complete(napi);
wil6210_unmask_irq_tx(wil);
wil_dbg_txrx(wil, "NAPI TX complete\n");
}
wil_dbg_txrx(wil, "NAPI TX poll(%d) done %d\n", budget, tx_done);
return min(tx_done, budget);
}
static void wil_dev_setup(struct net_device *dev)
{
ether_setup(dev);
dev->max_mtu = mtu_max;
dev->tx_queue_len = WIL_TX_Q_LEN_DEFAULT;
}
static void wil_vif_deinit(struct wil6210_vif *vif)
{
del_timer_sync(&vif->scan_timer);
del_timer_sync(&vif->p2p.discovery_timer);
cancel_work_sync(&vif->disconnect_worker);
cancel_work_sync(&vif->p2p.discovery_expired_work);
cancel_work_sync(&vif->p2p.delayed_listen_work);
wil_probe_client_flush(vif);
cancel_work_sync(&vif->probe_client_worker);
}
void wil_vif_free(struct wil6210_vif *vif)
{
struct net_device *ndev = vif_to_ndev(vif);
wil_vif_deinit(vif);
free_netdev(ndev);
}
static void wil_ndev_destructor(struct net_device *ndev)
{
struct wil6210_vif *vif = ndev_to_vif(ndev);
wil_vif_deinit(vif);
}
static void wil_connect_timer_fn(struct timer_list *t)
{
struct wil6210_vif *vif = from_timer(vif, t, connect_timer);
struct wil6210_priv *wil = vif_to_wil(vif);
bool q;
wil_err(wil, "Connect timeout detected, disconnect station\n");
/* reschedule to thread context - disconnect won't
* run from atomic context.
* queue on wmi_wq to prevent race with connect event.
*/
q = queue_work(wil->wmi_wq, &vif->disconnect_worker);
wil_dbg_wmi(wil, "queue_work of disconnect_worker -> %d\n", q);
}
static void wil_scan_timer_fn(struct timer_list *t)
{
struct wil6210_vif *vif = from_timer(vif, t, scan_timer);
struct wil6210_priv *wil = vif_to_wil(vif);
clear_bit(wil_status_fwready, wil->status);
wil_err(wil, "Scan timeout detected, start fw error recovery\n");
wil_fw_error_recovery(wil);
}
static void wil_p2p_discovery_timer_fn(struct timer_list *t)
{
struct wil6210_vif *vif = from_timer(vif, t, p2p.discovery_timer);
struct wil6210_priv *wil = vif_to_wil(vif);
wil_dbg_misc(wil, "p2p_discovery_timer_fn\n");
schedule_work(&vif->p2p.discovery_expired_work);
}
static void wil_vif_init(struct wil6210_vif *vif)
{
vif->bcast_vring = -1;
mutex_init(&vif->probe_client_mutex);
timer_setup(&vif->connect_timer, wil_connect_timer_fn, 0);
timer_setup(&vif->scan_timer, wil_scan_timer_fn, 0);
timer_setup(&vif->p2p.discovery_timer, wil_p2p_discovery_timer_fn, 0);
INIT_WORK(&vif->probe_client_worker, wil_probe_client_worker);
INIT_WORK(&vif->disconnect_worker, wil_disconnect_worker);
INIT_WORK(&vif->p2p.delayed_listen_work, wil_p2p_delayed_listen_work);
INIT_LIST_HEAD(&vif->probe_client_pending);
}
static u8 wil_vif_find_free_mid(struct wil6210_priv *wil)
{
u8 i;
for (i = 0; i < wil->max_vifs; i++) {
if (!wil->vifs[i])
return i;
}
return U8_MAX;
}
struct wil6210_vif *
wil_vif_alloc(struct wil6210_priv *wil, const char *name,
unsigned char name_assign_type, enum nl80211_iftype iftype)
{
struct net_device *ndev;
struct wireless_dev *wdev;
struct wil6210_vif *vif;
u8 mid;
mid = wil_vif_find_free_mid(wil);
if (mid == U8_MAX) {
wil_err(wil, "no available virtual interface\n");
return ERR_PTR(-EINVAL);
}
ndev = alloc_netdev(sizeof(*vif), name, name_assign_type,
wil_dev_setup);
if (!ndev) {
dev_err(wil_to_dev(wil), "alloc_netdev failed\n");
return ERR_PTR(-ENOMEM);
}
if (mid == 0) {
wil->main_ndev = ndev;
} else {
ndev->priv_destructor = wil_ndev_destructor;
ndev->needs_free_netdev = true;
}
vif = ndev_to_vif(ndev);
vif->ndev = ndev;
vif->wil = wil;
vif->mid = mid;
wil_vif_init(vif);
wdev = &vif->wdev;
wdev->wiphy = wil->wiphy;
wdev->iftype = iftype;
ndev->netdev_ops = &wil_netdev_ops;
wil_set_ethtoolops(ndev);
ndev->ieee80211_ptr = wdev;
ndev->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM |
NETIF_F_SG | NETIF_F_GRO |
NETIF_F_TSO | NETIF_F_TSO6 |
NETIF_F_RXHASH;
ndev->features |= ndev->hw_features;
SET_NETDEV_DEV(ndev, wiphy_dev(wdev->wiphy));
wdev->netdev = ndev;
return vif;
}
void *wil_if_alloc(struct device *dev)
{
struct wil6210_priv *wil;
struct wil6210_vif *vif;
int rc = 0;
wil = wil_cfg80211_init(dev);
if (IS_ERR(wil)) {
dev_err(dev, "wil_cfg80211_init failed\n");
return wil;
}
rc = wil_priv_init(wil);
if (rc) {
dev_err(dev, "wil_priv_init failed\n");
goto out_cfg;
}
wil_dbg_misc(wil, "if_alloc\n");
vif = wil_vif_alloc(wil, "wlan%d", NET_NAME_UNKNOWN,
NL80211_IFTYPE_STATION);
if (IS_ERR(vif)) {
dev_err(dev, "wil_vif_alloc failed\n");
rc = -ENOMEM;
goto out_priv;
}
wil->radio_wdev = vif_to_wdev(vif);
return wil;
out_priv:
wil_priv_deinit(wil);
out_cfg:
wil_cfg80211_deinit(wil);
return ERR_PTR(rc);
}
void wil_if_free(struct wil6210_priv *wil)
{
struct net_device *ndev = wil->main_ndev;
wil_dbg_misc(wil, "if_free\n");
if (!ndev)
return;
wil_priv_deinit(wil);
wil->main_ndev = NULL;
wil_ndev_destructor(ndev);
free_netdev(ndev);
wil_cfg80211_deinit(wil);
}
int wil_vif_add(struct wil6210_priv *wil, struct wil6210_vif *vif)
{
struct net_device *ndev = vif_to_ndev(vif);
struct wireless_dev *wdev = vif_to_wdev(vif);
bool any_active = wil_has_up_ifaces(wil);
int rc;
ASSERT_RTNL();
if (wil->vifs[vif->mid]) {
dev_err(&ndev->dev, "VIF with mid %d already in use\n",
vif->mid);
return -EEXIST;
}
if (any_active && vif->mid != 0) {
rc = wmi_port_allocate(wil, vif->mid, ndev->dev_addr,
wdev->iftype);
if (rc)
return rc;
}
rc = register_netdevice(ndev);
if (rc < 0) {
dev_err(&ndev->dev, "Failed to register netdev: %d\n", rc);
if (any_active && vif->mid != 0)
wmi_port_delete(wil, vif->mid);
return rc;
}
wil->vifs[vif->mid] = vif;
return 0;
}
int wil_if_add(struct wil6210_priv *wil)
{
struct wiphy *wiphy = wil->wiphy;
struct net_device *ndev = wil->main_ndev;
struct wil6210_vif *vif = ndev_to_vif(ndev);
int rc;
wil_dbg_misc(wil, "entered");
strlcpy(wiphy->fw_version, wil->fw_version, sizeof(wiphy->fw_version));
rc = wiphy_register(wiphy);
if (rc < 0) {
wil_err(wil, "failed to register wiphy, err %d\n", rc);
return rc;
}
netif_napi_add(ndev, &wil->napi_rx, wil6210_netdev_poll_rx,
WIL6210_NAPI_BUDGET);
netif_tx_napi_add(ndev, &wil->napi_tx, wil6210_netdev_poll_tx,
WIL6210_NAPI_BUDGET);
wil_update_net_queues_bh(wil, NULL, true);
rtnl_lock();
rc = wil_vif_add(wil, vif);
rtnl_unlock();
if (rc < 0)
goto out_wiphy;
return 0;
out_wiphy:
wiphy_unregister(wiphy);
return rc;
}
void wil_vif_remove(struct wil6210_priv *wil, u8 mid)
{
struct wil6210_vif *vif;
struct net_device *ndev;
bool any_active = wil_has_up_ifaces(wil);
ASSERT_RTNL();
if (mid >= wil->max_vifs) {
wil_err(wil, "invalid MID: %d\n", mid);
return;
}
vif = wil->vifs[mid];
if (!vif) {
wil_err(wil, "MID %d not registered\n", mid);
return;
}
ndev = vif_to_ndev(vif);
/* during unregister_netdevice cfg80211_leave may perform operations
* such as stop AP, disconnect, so we only clear the VIF afterwards
*/
unregister_netdevice(ndev);
if (any_active && vif->mid != 0)
wmi_port_delete(wil, vif->mid);
wil->vifs[mid] = NULL;
/* for VIFs, ndev will be freed by destructor after RTNL is unlocked.
* the main interface will be freed in wil_if_free, we need to keep it
* a bit longer so logging macros will work.
*/
}
void wil_if_remove(struct wil6210_priv *wil)
{
struct net_device *ndev = wil->main_ndev;
struct wireless_dev *wdev = ndev->ieee80211_ptr;
wil_dbg_misc(wil, "if_remove\n");
rtnl_lock();
wil_vif_remove(wil, 0);
rtnl_unlock();
wiphy_unregister(wdev->wiphy);
}
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