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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
* Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
*/
#ifndef __MT76_UTIL_H
#define __MT76_UTIL_H
#include <linux/skbuff.h>
#include <linux/bitops.h>
#include <linux/bitfield.h>
#include <net/mac80211.h>
struct mt76_worker
{
struct task_struct *task;
void (*fn)(struct mt76_worker *);
unsigned long state;
};
enum {
MT76_WORKER_SCHEDULED,
MT76_WORKER_RUNNING,
};
#define MT76_INCR(_var, _size) \
(_var = (((_var) + 1) % (_size)))
int mt76_wcid_alloc(u32 *mask, int size);
static inline bool
mt76_wcid_mask_test(u32 *mask, int idx)
{
return mask[idx / 32] & BIT(idx % 32);
}
static inline void
mt76_wcid_mask_set(u32 *mask, int idx)
{
mask[idx / 32] |= BIT(idx % 32);
}
static inline void
mt76_wcid_mask_clear(u32 *mask, int idx)
{
mask[idx / 32] &= ~BIT(idx % 32);
}
static inline void
mt76_skb_set_moredata(struct sk_buff *skb, bool enable)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
if (enable)
hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA);
else
hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);
}
int __mt76_worker_fn(void *ptr);
static inline int
mt76_worker_setup(struct ieee80211_hw *hw, struct mt76_worker *w,
void (*fn)(struct mt76_worker *),
const char *name)
{
const char *dev_name = wiphy_name(hw->wiphy);
int ret;
if (fn)
w->fn = fn;
w->task = kthread_create(__mt76_worker_fn, w, "mt76-%s %s",
name, dev_name);
ret = PTR_ERR_OR_ZERO(w->task);
if (ret) {
w->task = NULL;
return ret;
}
wake_up_process(w->task);
return 0;
}
static inline void mt76_worker_schedule(struct mt76_worker *w)
{
if (!w->task)
return;
if (!test_and_set_bit(MT76_WORKER_SCHEDULED, &w->state) &&
!test_bit(MT76_WORKER_RUNNING, &w->state))
wake_up_process(w->task);
}
static inline void mt76_worker_disable(struct mt76_worker *w)
{
if (!w->task)
return;
kthread_park(w->task);
WRITE_ONCE(w->state, 0);
}
static inline void mt76_worker_enable(struct mt76_worker *w)
{
if (!w->task)
return;
kthread_unpark(w->task);
mt76_worker_schedule(w);
}
static inline void mt76_worker_teardown(struct mt76_worker *w)
{
if (!w->task)
return;
kthread_stop(w->task);
w->task = NULL;
}
#endif
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