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