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// SPDX-License-Identifier: GPL-2.0-only
/*
* Implementation of mac80211 API.
*
* Copyright (c) 2017-2019, Silicon Laboratories, Inc.
* Copyright (c) 2010, ST-Ericsson
*/
#include <net/mac80211.h>
#include "sta.h"
#include "wfx.h"
#define TXOP_UNIT 32
static int wfx_set_tim_impl(struct wfx_vif *wvif, bool aid0_bit_set)
{
struct sk_buff *skb;
struct hif_ie_flags target_frame = {
.beacon = 1,
};
u16 tim_offset, tim_length;
u8 *tim_ptr;
skb = ieee80211_beacon_get_tim(wvif->wdev->hw, wvif->vif,
&tim_offset, &tim_length);
if (!skb)
return -ENOENT;
tim_ptr = skb->data + tim_offset;
if (tim_offset && tim_length >= 6) {
/* Ignore DTIM count from mac80211:
* firmware handles DTIM internally.
*/
tim_ptr[2] = 0;
/* Set/reset aid0 bit */
if (aid0_bit_set)
tim_ptr[4] |= 1;
else
tim_ptr[4] &= ~1;
}
hif_update_ie(wvif, &target_frame, tim_ptr, tim_length);
dev_kfree_skb(skb);
return 0;
}
static void wfx_mcast_start_work(struct work_struct *work)
{
struct wfx_vif *wvif = container_of(work, struct wfx_vif, mcast_start_work);
cancel_work_sync(&wvif->mcast_stop_work);
if (!wvif->aid0_bit_set) {
wfx_tx_lock_flush(wvif->wdev);
wfx_set_tim_impl(wvif, true);
wvif->aid0_bit_set = true;
mod_timer(&wvif->mcast_timeout, TU_TO_JIFFIES(1000));
wfx_tx_unlock(wvif->wdev);
}
}
static void wfx_mcast_stop_work(struct work_struct *work)
{
struct wfx_vif *wvif = container_of(work, struct wfx_vif, mcast_stop_work);
if (wvif->aid0_bit_set) {
del_timer_sync(&wvif->mcast_timeout);
wfx_tx_lock_flush(wvif->wdev);
wvif->aid0_bit_set = false;
wfx_set_tim_impl(wvif, false);
wfx_tx_unlock(wvif->wdev);
}
}
static void wfx_mcast_timeout(struct timer_list *t)
{
struct wfx_vif *wvif = from_timer(wvif, t, mcast_timeout);
dev_warn(wvif->wdev->dev, "multicast delivery timeout\n");
spin_lock_bh(&wvif->ps_state_lock);
wvif->mcast_tx = wvif->aid0_bit_set && wvif->mcast_buffered;
if (wvif->mcast_tx)
wfx_bh_request_tx(wvif->wdev);
spin_unlock_bh(&wvif->ps_state_lock);
}
int wfx_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
{
int i;
struct wfx_dev *wdev = hw->priv;
struct wfx_vif *wvif = (struct wfx_vif *) vif->drv_priv;
// FIXME: parameters are set by kernel juste after interface_add.
// Keep struct hif_req_edca_queue_params blank?
struct hif_req_edca_queue_params default_edca_params[] = {
[IEEE80211_AC_VO] = {
.queue_id = HIF_QUEUE_ID_VOICE,
.aifsn = 2,
.cw_min = 3,
.cw_max = 7,
.tx_op_limit = TXOP_UNIT * 47,
},
[IEEE80211_AC_VI] = {
.queue_id = HIF_QUEUE_ID_VIDEO,
.aifsn = 2,
.cw_min = 7,
.cw_max = 15,
.tx_op_limit = TXOP_UNIT * 94,
},
[IEEE80211_AC_BE] = {
.queue_id = HIF_QUEUE_ID_BESTEFFORT,
.aifsn = 3,
.cw_min = 15,
.cw_max = 1023,
.tx_op_limit = TXOP_UNIT * 0,
},
[IEEE80211_AC_BK] = {
.queue_id = HIF_QUEUE_ID_BACKGROUND,
.aifsn = 7,
.cw_min = 15,
.cw_max = 1023,
.tx_op_limit = TXOP_UNIT * 0,
},
};
if (wfx_api_older_than(wdev, 2, 0)) {
default_edca_params[IEEE80211_AC_BE].queue_id = HIF_QUEUE_ID_BACKGROUND;
default_edca_params[IEEE80211_AC_BK].queue_id = HIF_QUEUE_ID_BESTEFFORT;
}
for (i = 0; i < ARRAY_SIZE(wdev->vif); i++) {
if (!wdev->vif[i]) {
wdev->vif[i] = vif;
wvif->id = i;
break;
}
}
if (i == ARRAY_SIZE(wdev->vif))
return -EOPNOTSUPP;
wvif->vif = vif;
wvif->wdev = wdev;
INIT_WORK(&wvif->link_id_work, wfx_link_id_work);
INIT_DELAYED_WORK(&wvif->link_id_gc_work, wfx_link_id_gc_work);
spin_lock_init(&wvif->ps_state_lock);
INIT_WORK(&wvif->mcast_start_work, wfx_mcast_start_work);
INIT_WORK(&wvif->mcast_stop_work, wfx_mcast_stop_work);
timer_setup(&wvif->mcast_timeout, wfx_mcast_timeout, 0);
BUG_ON(ARRAY_SIZE(default_edca_params) != ARRAY_SIZE(wvif->edca.params));
for (i = 0; i < IEEE80211_NUM_ACS; i++)
memcpy(&wvif->edca.params[i], &default_edca_params[i], sizeof(default_edca_params[i]));
tx_policy_init(wvif);
return 0;
}
void wfx_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct wfx_vif *wvif = (struct wfx_vif *) vif->drv_priv;
wfx_tx_queues_wait_empty_vif(wvif);
cancel_delayed_work_sync(&wvif->link_id_gc_work);
del_timer_sync(&wvif->mcast_timeout);
}
int wfx_start(struct ieee80211_hw *hw)
{
return 0;
}
void wfx_stop(struct ieee80211_hw *hw)
{
struct wfx_dev *wdev = hw->priv;
wfx_tx_lock_flush(wdev);
wfx_tx_queues_clear(wdev);
wfx_tx_unlock(wdev);
WARN(atomic_read(&wdev->tx_lock), "tx_lock is locked");
}
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