xref: /linux/drivers/net/wireless/morsemicro/mm81x/yaps.c (revision 1fc5a74b108fc90951890ec513ac81869f5eaff1)

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2017-2026 Morse Micro
 */
#include <linux/gpio.h>
#include <linux/random.h>
#include <linux/timer.h>
#include <linux/bitops.h>
#include <linux/slab.h>
#include "hif.h"
#include "ps.h"
#include "bus.h"
#include "command.h"
#include "skbq.h"

/* This is a fail safe timeout */
#define CHIP_FULL_RECOVERY_TIMEOUT_MS 30

/* Defined as the max number of MPDUs per AMPDU */
#define MAX_PKTS_PER_TX_TXN 16
#define MAX_PKTS_PER_RX_TXN 32

static int mm81x_yaps_alloc_pkt_buffers(struct mm81x_yaps *yaps)
{
	yaps->hw.to_chip_pkts = kzalloc_objs(*yaps->hw.to_chip_pkts,
					     MAX_PKTS_PER_TX_TXN);
	if (!yaps->hw.to_chip_pkts)
		return -ENOMEM;

	yaps->hw.from_chip_pkts = kzalloc_objs(*yaps->hw.from_chip_pkts,
					       MAX_PKTS_PER_RX_TXN);
	if (!yaps->hw.from_chip_pkts) {
		kfree(yaps->hw.to_chip_pkts);
		yaps->hw.to_chip_pkts = NULL;
		return -ENOMEM;
	}

	return 0;
}

static void mm81x_yaps_free_pkt_buffers(struct mm81x_yaps *yaps)
{
	kfree(yaps->hw.from_chip_pkts);
	yaps->hw.from_chip_pkts = NULL;
	kfree(yaps->hw.to_chip_pkts);
	yaps->hw.to_chip_pkts = NULL;
}

static int mm81x_yaps_write_pkts(struct mm81x_yaps *yaps,
				 struct mm81x_yaps_pkt *pkts, int num_pkts,
				 int *num_pkts_sent)
{
	return yaps->ops->write_pkts(yaps, pkts, num_pkts, num_pkts_sent);
}

static int mm81x_yaps_read_pkts(struct mm81x_yaps *yaps,
				struct mm81x_yaps_pkt *pkts, int num_pkts_max,
				int *num_pkts_received)
{
	return yaps->ops->read_pkts(yaps, pkts, num_pkts_max,
				    num_pkts_received);
}

static int mm81x_yaps_update_status(struct mm81x_yaps *yaps)
{
	return yaps->ops->update_status(yaps);
}

/* Mappings between sk_buff, skbq and yaps */
static struct mm81x_skbq *mm81x_yaps_tc_q_from_aci(struct mm81x *mors, int aci)
{
	struct mm81x_yaps *yaps = &mors->hif.u.yaps;

	if (aci >= ARRAY_SIZE(yaps->data_tx_qs))
		return NULL;
	return &yaps->data_tx_qs[aci];
}

static void mm81x_yaps_get_tx_qs(struct mm81x *mors, struct mm81x_skbq **qs,
				 int *num_qs)
{
	*qs = mors->hif.u.yaps.data_tx_qs;
	*num_qs = YAPS_TX_SKBQ_MAX;
}

static struct mm81x_skbq *mm81x_yaps_get_bcn_tc_q(struct mm81x *mors)
{
	return &mors->hif.u.yaps.beacon_q;
}

static struct mm81x_skbq *mm81x_yaps_get_mgmt_tc_q(struct mm81x *mors)
{
	return &mors->hif.u.yaps.mgmt_q;
}

static struct mm81x_skbq *mm81x_yaps_get_tx_cmd_queue(struct mm81x *mors)
{
	return &mors->hif.u.yaps.cmd_q;
}

static int mm81x_yaps_irq_handler(struct mm81x *mors, u32 status)
{
	if (status & BIT(MM81X_INT_YAPS_FC_PKT_WAITING_IRQN))
		set_bit(MM81X_HIF_EVT_RX_PEND, &mors->hif.event_flags);

	if (status & BIT(MM81X_INT_YAPS_FC_PACKET_FREED_UP_IRQN)) {
		timer_delete_sync_try(&mors->hif.u.yaps.chip_queue_full.timer);
		set_bit(MM81X_HIF_EVT_TX_PACKET_FREED_UP_PEND,
			&mors->hif.event_flags);
	}

	queue_work(mors->chip_wq, &mors->hif_work);
	return 0;
}

const struct mm81x_hif_ops mm81x_yaps_ops = {
	.init = mm81x_yaps_init,
	.flush_tx_data = mm81x_yaps_flush_tx_data,
	.flush_cmds = mm81x_yaps_flush_cmds,
	.get_tx_status_pending_count = mm81x_yaps_get_tx_status_pending_count,
	.get_tx_buffered_count = mm81x_yaps_get_tx_buffered_count,
	.finish = mm81x_yaps_finish,
	.skbq_get_tx_qs = mm81x_yaps_get_tx_qs,
	.get_tx_beacon_queue = mm81x_yaps_get_bcn_tc_q,
	.get_tx_mgmt_queue = mm81x_yaps_get_mgmt_tc_q,
	.get_tx_cmd_queue = mm81x_yaps_get_tx_cmd_queue,
	.get_tx_data_queue = mm81x_yaps_tc_q_from_aci,
	.handle_irq = mm81x_yaps_irq_handler
};

static int mm81x_yaps_read_pkt(struct mm81x_yaps *yaps, struct sk_buff *skb)
{
	struct mm81x *mors = yaps->mors;
	struct sk_buff_head skbq;
	struct mm81x_skbq *mq = NULL;
	struct mm81x_skb_hdr *hdr;
	int skb_bytes_remaining;
	int skb_len;
	int ret = 0;

	if (!skb) {
		ret = -EINVAL;
		goto exit_return_page;
	}

	__skb_queue_head_init(&skbq);

	hdr = (struct mm81x_skb_hdr *)skb->data;
	if (hdr->sync != MM81X_SKB_HEADER_SYNC) {
		dev_err(mors->dev, "sync value error [0xAA:%d], hdr.len %d",
			hdr->sync, hdr->len);
		ret = -EIO;
		goto exit_return_page;
	}

	if (yaps->mors->hif.validate_skb_checksum &&
	    !mm81x_skbq_validate_checksum(skb->data)) {
		dev_dbg(yaps->mors->dev,
			"SKB checksum is invalid hdr:[c:%02X s:%02X len:%d]",
			hdr->channel, hdr->sync, hdr->len);

		if (hdr->channel != MM81X_SKB_CHAN_TX_STATUS) {
			ret = -EIO;
			goto exit;
		}
	}

	switch (hdr->channel) {
	case MM81X_SKB_CHAN_DATA:
	case MM81X_SKB_CHAN_NDP_FRAMES:
	case MM81X_SKB_CHAN_TX_STATUS:
	case MM81X_SKB_CHAN_DATA_NOACK:
	case MM81X_SKB_CHAN_BEACON:
	case MM81X_SKB_CHAN_MGMT:
		mq = &yaps->data_rx_q;
		break;
	case MM81X_SKB_CHAN_COMMAND:
		mq = &yaps->cmd_resp_q;
		break;
	default:
		dev_err(mors->dev, "channel value error [%d]", hdr->channel);
		ret = -EIO;
		goto exit_return_page;
	}

	skb_len = sizeof(*hdr) + hdr->offset + le16_to_cpu(hdr->len);
	skb_bytes_remaining = mm81x_skbq_space(mq);

	if (skb_len > skb_bytes_remaining) {
		dev_err(mors->dev,
			"Page will not fit in SKBQ, dropping - len %d remain %d",
			skb_len, skb_bytes_remaining);
		ret = -ENOMEM;
		/* Queue work to clear backlog */
		queue_work(mors->net_wq, &mq->dispatch_work);
		goto exit_return_page;
	}

	skb_trim(skb, skb_len);
	__skb_queue_tail(&skbq, skb);

	if (skb_queue_len(&skbq))
		mm81x_skbq_enq(mq, &skbq);

	/* push packets up in a different context */
	queue_work(mors->net_wq, &mq->dispatch_work);

	goto exit;

exit_return_page:
	if (ret && mq) {
		dev_err(mors->dev, "failed %d", ret);
		mm81x_skbq_purge(mq, &skbq);
		goto exit;
	}

exit:
	if (ret && skb)
		dev_kfree_skb(skb);

	return ret;
}

static int mm81x_yaps_tx(struct mm81x_yaps *yaps, struct mm81x_skbq *mq)
{
	int i;
	int ret = 0;
	int num_skbs = 0;
	int tc_pkt_idx = 0;
	int num_pkts_sent = 0;
	struct sk_buff *skb;
	struct sk_buff_head skbq_to_send;
	struct sk_buff_head skbq_sent;
	struct sk_buff_head skbq_failed;
	struct sk_buff *pfirst, *pnext;
	struct mm81x *mors = yaps->mors;
	struct mm81x_skb_hdr *hdr;

	/* Check there is something on the queue */
	spin_lock_bh(&mq->lock);
	skb = skb_peek(&mq->skbq);
	spin_unlock_bh(&mq->lock);
	if (!skb)
		return 0;

	__skb_queue_head_init(&skbq_to_send);
	__skb_queue_head_init(&skbq_sent);
	__skb_queue_head_init(&skbq_failed);

	if (mq == &yaps->cmd_q)
		/* Purge timed-out commands (this should not happen) */
		mm81x_skbq_purge(mq, &mq->pending);
	else if (mq == &yaps->mgmt_q && skb_queue_len(&mq->skbq) > 0)
		/*
		 * Purge old mgmt frames that have not been sent due to
		 * congestion
		 */
		mm81x_skbq_purge_aged(mors, mq);

	num_skbs =
		mm81x_skbq_deq_num_skb(mq, &skbq_to_send, MAX_PKTS_PER_TX_TXN);

	skb_queue_walk_safe(&skbq_to_send, pfirst, pnext) {
		enum mm81x_yaps_to_chip_q tc_queue;

		hdr = (struct mm81x_skb_hdr *)pfirst->data;
		switch (hdr->channel) {
		case MM81X_SKB_CHAN_COMMAND:
			tc_queue = MM81X_YAPS_CMD_Q;
			break;
		case MM81X_SKB_CHAN_BEACON:
			tc_queue = MM81X_YAPS_BEACON_Q;
			break;
		case MM81X_SKB_CHAN_MGMT:
			tc_queue = MM81X_YAPS_MGMT_Q;
			break;
		default:
			tc_queue = MM81X_YAPS_TX_Q;
			break;
		}
		yaps->hw.to_chip_pkts[tc_pkt_idx].tc_queue = tc_queue;
		yaps->hw.to_chip_pkts[tc_pkt_idx].skb = pfirst;
		tc_pkt_idx++;
	}

	/* Send queued packets to chip */
	ret = mm81x_yaps_update_status(yaps);
	if (ret)
		return ret;

	ret = mm81x_yaps_write_pkts(yaps, yaps->hw.to_chip_pkts, tc_pkt_idx,
				    &num_pkts_sent);

	/* Move sent packets to done queue */
	for (i = 0; i < num_pkts_sent; ++i) {
		pfirst = __skb_dequeue(&skbq_to_send);
		__skb_queue_tail(&skbq_sent, pfirst);
	}

	for (i = num_pkts_sent; i < num_skbs; ++i) {
		pfirst = __skb_dequeue(&skbq_to_send);
		__skb_queue_tail(&skbq_failed, pfirst);
	}

	if (skb_queue_len(&skbq_failed) > 0) {
		mm81x_skbq_enq_prepend(mq, &skbq_failed);

		/* queue full, can't requeue */
		if (skb_queue_len(&skbq_failed) > 0) {
			dev_warn(mors->dev,
				 "can't requeue failed pkts, purging");
			__skb_queue_purge(&skbq_failed);
		}
	}

	if (skb_queue_len(&skbq_sent) > 0)
		mm81x_skbq_tx_complete(mq, &skbq_sent);

	return ret;
}

/* Returns true if there are TX data pages waiting to be sent */
static bool mm81x_yaps_tx_data_handler(struct mm81x_yaps *yaps)
{
	s16 aci;
	u32 count = 0;
	struct mm81x *mors = yaps->mors;

	for (aci = MM81X_ACI_VO; aci >= 0; aci--) {
		struct mm81x_skbq *data_q = mm81x_yaps_tc_q_from_aci(mors, aci);

		if (!mm81x_is_data_tx_allowed(mors))
			break;

		yaps->chip_queue_full.is_full = mm81x_yaps_tx(yaps, data_q);
		count += mm81x_skbq_count(data_q);

		if (yaps->chip_queue_full.is_full)
			break;

		if (aci == MM81X_ACI_BE)
			break;
	}

	/*
	 * Data has potentially been transmitted from the data SKBQs.
	 * If the mac80211 TX data Qs were previously stopped, now would
	 * be a good time to check if they can be started again.
	 */
	mm81x_skbq_may_wake_tx_queues(mors);

	return (count > 0) && mm81x_is_data_tx_allowed(mors);
}

/* Returns true if there are commands waiting to be sent */
static bool mm81x_yaps_tx_cmd_handler(struct mm81x_yaps *yaps)
{
	struct mm81x_skbq *cmd_q = &yaps->cmd_q;

	mm81x_yaps_tx(yaps, cmd_q);

	return mm81x_skbq_count(cmd_q) > 0;
}

static bool mm81x_yaps_tx_beacon_handler(struct mm81x_yaps *yaps)
{
	struct mm81x_skbq *beacon_q = &yaps->beacon_q;

	mm81x_yaps_tx(yaps, beacon_q);

	return mm81x_skbq_count(beacon_q) > 0;
}

static bool mm81x_yaps_tx_mgmt_handler(struct mm81x_yaps *yaps)
{
	struct mm81x_skbq *mgmt_q = &yaps->mgmt_q;

	mm81x_yaps_tx(yaps, mgmt_q);

	return mm81x_skbq_count(mgmt_q) > 0;
}

/* Returns true if there are populated RX pages left in the device */
static bool mm81x_yaps_rx_handler(struct mm81x_yaps *yaps)
{
	int ret = 0;
	int i;
	int num_pks_received;

	ret = mm81x_yaps_update_status(yaps);
	if (ret)
		goto exit;

	ret = mm81x_yaps_read_pkts(yaps, yaps->hw.from_chip_pkts,
				   MAX_PKTS_PER_RX_TXN, &num_pks_received);
	if (ret && ret != -EAGAIN) {
		dev_err(yaps->mors->dev, "YAPS read_pkts fail: %d", ret);
		goto exit;
	}

	for (i = 0; i < num_pks_received; ++i) {
		mm81x_yaps_read_pkt(yaps, yaps->hw.from_chip_pkts[i].skb);
		yaps->hw.from_chip_pkts[i].skb = NULL;
	}

exit:
	if (ret == -ENOMEM || ret == -EAGAIN)
		return true;
	else
		return false;
}

void mm81x_yaps_stale_tx_work(struct work_struct *work)
{
	int i;
	int flushed = 0;
	struct mm81x *mors = container_of(work, struct mm81x, tx_stale_work);
	struct mm81x_yaps *yaps;

	yaps = &mors->hif.u.yaps;
	flushed += mm81x_skbq_check_for_stale_tx(mors, &yaps->beacon_q);
	flushed += mm81x_skbq_check_for_stale_tx(mors, &yaps->mgmt_q);

	for (i = 0; i < ARRAY_SIZE(yaps->data_tx_qs); i++)
		flushed += mm81x_skbq_check_for_stale_tx(mors,
							 &yaps->data_tx_qs[i]);

	if (!flushed)
		return;

	dev_dbg(mors->dev, "Flushed %d stale TX SKBs", flushed);

	if (mors->ps.enable && !mors->ps.suspended &&
	    (mm81x_yaps_get_tx_buffered_count(mors) == 0)) {
		/* Evaluate ps to check if it was gated on a stale tx status */
		queue_delayed_work(mors->chip_wq, &mors->ps.delayed_eval_work,
				   0);
	}
}

void mm81x_yaps_work(struct work_struct *work)
{
	struct mm81x *mors = container_of(work, struct mm81x, hif_work);
	unsigned long *flags = &mors->hif.event_flags;
	struct mm81x_yaps *yaps = &mors->hif.u.yaps;

	if (test_bit(MM81X_STATE_CHIP_UNRESPONSIVE, &mors->state_flags))
		return;

	if (!*flags)
		return;

	/* Disable power save in case it is running */
	mm81x_ps_disable(mors);
	mm81x_claim_bus(mors);

	/*
	 * Handle any populated RX pages from chip first to
	 * avoid dropping pkts due to full on-chip buffers.
	 * Check if all pages were removed, set event flags if not.
	 */
	if (test_and_clear_bit(MM81X_HIF_EVT_RX_PEND, flags)) {
		if (mm81x_yaps_rx_handler(yaps))
			set_bit(MM81X_HIF_EVT_RX_PEND, flags);
	}

	/* TX any commands before considering data */
	if (test_and_clear_bit(MM81X_HIF_EVT_TX_COMMAND_PEND, flags)) {
		if (mm81x_yaps_tx_cmd_handler(yaps))
			set_bit(MM81X_HIF_EVT_TX_COMMAND_PEND, flags);
	}

	/* TX beacons before considering mgmt/data */
	if (test_and_clear_bit(MM81X_HIF_EVT_TX_BEACON_PEND, flags)) {
		if (mm81x_yaps_tx_beacon_handler(yaps))
			set_bit(MM81X_HIF_EVT_TX_BEACON_PEND, flags);
	}

	/* TX mgmt before considering data */
	if (test_and_clear_bit(MM81X_HIF_EVT_TX_MGMT_PEND, flags)) {
		if (mm81x_yaps_tx_mgmt_handler(yaps))
			set_bit(MM81X_HIF_EVT_TX_MGMT_PEND, flags);
	}

	/* Pause TX data Qs */
	if (test_and_clear_bit(MM81X_HIF_EVT_DATA_TRAFFIC_PAUSE_PEND, flags)) {
		test_and_clear_bit(MM81X_HIF_EVT_DATA_TRAFFIC_RESUME_PEND,
				   flags);
		mm81x_skbq_data_traffic_pause(mors);
	}

	/* Resume TX data Qs  */
	if (test_and_clear_bit(MM81X_HIF_EVT_DATA_TRAFFIC_RESUME_PEND, flags))
		mm81x_skbq_data_traffic_resume(mors);

	/* Handle chip queue status */
	if (test_and_clear_bit(MM81X_HIF_EVT_TX_PACKET_FREED_UP_PEND, flags))
		yaps->chip_queue_full.is_full = false;

	/* Check to see if the queue is full or
	 * long enough has past since the queue was full
	 */
	if (yaps->chip_queue_full.is_full &&
	    time_before(jiffies, yaps->chip_queue_full.retry_expiry))
		goto exit;

	/* Finally TX any data */
	if (test_and_clear_bit(MM81X_HIF_EVT_TX_DATA_PEND, flags)) {
		if (mm81x_yaps_tx_data_handler(yaps))
			set_bit(MM81X_HIF_EVT_TX_DATA_PEND, flags);

		if (yaps->chip_queue_full.is_full) {
			yaps->chip_queue_full.retry_expiry =
				jiffies +
				msecs_to_jiffies(CHIP_FULL_RECOVERY_TIMEOUT_MS);
			mod_timer(&yaps->chip_queue_full.timer,
				  yaps->chip_queue_full.retry_expiry);
		}
	}

exit:

	/* Disable power save in case it is running */
	mm81x_release_bus(mors);
	mm81x_ps_enable(mors);

	/* Don't requeue work if we are shutting down. */
	if (yaps->finish)
		return;
	/*
	 * Evaluate all events except MM81X_HIF_EVT_TX_DATA_PEND in case data
	 * tx queue is full
	 */
	if ((*flags) & ~(1 << MM81X_HIF_EVT_TX_DATA_PEND))
		queue_work(mors->chip_wq, &mors->hif_work);
	/*
	 * if data tx queue is not full and the work hasn't been queued let's
	 * queue it
	 */
	else if (!yaps->chip_queue_full.is_full && *flags)
		queue_work(mors->chip_wq, &mors->hif_work);
}

int mm81x_yaps_get_tx_status_pending_count(struct mm81x *mors)
{
	int i = 0;
	int count = 0;
	struct mm81x_yaps *yaps;

	yaps = &mors->hif.u.yaps;
	count += skb_queue_len(&yaps->beacon_q.pending);
	count += skb_queue_len(&yaps->mgmt_q.pending);
	count += skb_queue_len(&yaps->cmd_q.pending);

	for (i = 0; i < ARRAY_SIZE(yaps->data_tx_qs); i++)
		count += skb_queue_len(&yaps->data_tx_qs[i].pending);

	return count;
}

int mm81x_yaps_get_tx_buffered_count(struct mm81x *mors)
{
	int i = 0;
	int count = 0;
	struct mm81x_yaps *yaps;

	yaps = &mors->hif.u.yaps;
	count += skb_queue_len(&yaps->beacon_q.skbq) +
		 skb_queue_len(&yaps->beacon_q.pending);
	count += skb_queue_len(&yaps->mgmt_q.skbq) +
		 skb_queue_len(&yaps->mgmt_q.pending);
	count += skb_queue_len(&yaps->cmd_q.skbq) +
		 skb_queue_len(&yaps->cmd_q.pending);

	for (i = 0; i < ARRAY_SIZE(yaps->data_tx_qs); i++)
		count += mm81x_skbq_count_tx_ready(&yaps->data_tx_qs[i]) +
			 skb_queue_len(&yaps->data_tx_qs[i].pending);

	return count;
}

static void mm81x_yaps_tx_q_full_timer(struct timer_list *t)
{
	struct mm81x_yaps *yaps =
		timer_container_of(yaps, t, chip_queue_full.timer);

	queue_work(yaps->mors->chip_wq, &yaps->mors->hif_work);
}

static void mm81x_yaps_q_chip_full_timer_init(struct mm81x_yaps *yaps)
{
	timer_setup(&yaps->chip_queue_full.timer, mm81x_yaps_tx_q_full_timer,
		    0);
}

static void mm81x_yaps_q_chip_full_timer_finish(struct mm81x_yaps *yaps)
{
	timer_shutdown_sync(&yaps->chip_queue_full.timer);
}

int mm81x_yaps_init(struct mm81x *mors)
{
	int i, ret;
	struct mm81x_yaps *yaps;

	ret = mm81x_yaps_hw_init(mors);
	if (ret) {
		dev_err(mors->dev, "mm81x_yaps_hw_init failed %d", ret);
		return ret;
	}

	yaps = &mors->hif.u.yaps;
	yaps->mors = mors;

	mm81x_claim_bus(mors);

	ret = mm81x_yaps_alloc_pkt_buffers(yaps);
	if (ret) {
		dev_err(mors->dev, "Failed to allocate YAPS packet buffers: %d",
			ret);
		mm81x_yaps_hw_finish(mors);
		mm81x_release_bus(mors);
		return ret;
	}

	/* YAPS is bi-directional */
	mm81x_skbq_init(mors, &yaps->data_rx_q,
			MM81X_HIF_FLAGS_DATA | MM81X_HIF_FLAGS_DIR_TO_HOST);
	mm81x_skbq_init(mors, &yaps->beacon_q,
			MM81X_HIF_FLAGS_DATA | MM81X_HIF_FLAGS_DIR_TO_HOST);
	mm81x_skbq_init(mors, &yaps->mgmt_q,
			MM81X_HIF_FLAGS_DATA | MM81X_HIF_FLAGS_DIR_TO_HOST);

	for (i = 0; i < ARRAY_SIZE(yaps->data_tx_qs); i++) {
		mm81x_skbq_init(mors, &yaps->data_tx_qs[i],
				MM81X_HIF_FLAGS_DATA |
					MM81X_HIF_FLAGS_DIR_TO_CHIP);
	}

	mm81x_skbq_init(mors, &yaps->cmd_q,
			MM81X_HIF_FLAGS_COMMAND | MM81X_HIF_FLAGS_DIR_TO_CHIP);
	mm81x_skbq_init(mors, &yaps->cmd_resp_q,
			MM81X_HIF_FLAGS_COMMAND | MM81X_HIF_FLAGS_DIR_TO_HOST);

	mm81x_yaps_q_chip_full_timer_init(yaps);
	INIT_WORK(&mors->hif_work, mm81x_yaps_work);
	INIT_WORK(&mors->tx_stale_work, mm81x_yaps_stale_tx_work);
	mm81x_release_bus(mors);
	mm81x_hw_enable_stop_notifications(mors, true);
	return 0;
}

void mm81x_yaps_finish(struct mm81x *mors)
{
	int i;
	struct mm81x_yaps *yaps;

	mm81x_yaps_hw_enable_irqs(mors, false);

	yaps = &mors->hif.u.yaps;
	yaps->finish = true;

	mm81x_skbq_finish(&yaps->data_rx_q);
	mm81x_skbq_finish(&yaps->beacon_q);
	mm81x_skbq_finish(&yaps->mgmt_q);

	for (i = 0; i < ARRAY_SIZE(yaps->data_tx_qs); i++)
		mm81x_skbq_finish(&yaps->data_tx_qs[i]);

	mm81x_skbq_finish(&yaps->cmd_q);
	mm81x_skbq_finish(&yaps->cmd_resp_q);

	mm81x_yaps_q_chip_full_timer_finish(yaps);

	cancel_work_sync(&mors->hif_work);
	cancel_work_sync(&mors->tx_stale_work);

	mm81x_yaps_free_pkt_buffers(yaps);
	mm81x_yaps_hw_finish(mors);
}

void mm81x_yaps_flush_tx_data(struct mm81x *mors)
{
	int i;
	struct mm81x_yaps *yaps = &mors->hif.u.yaps;

	mm81x_skbq_tx_flush(&yaps->beacon_q);
	mm81x_skbq_tx_flush(&yaps->mgmt_q);

	for (i = 0; i < ARRAY_SIZE(yaps->data_tx_qs); i++)
		mm81x_skbq_tx_flush(&yaps->data_tx_qs[i]);
}

void mm81x_yaps_flush_cmds(struct mm81x *mors)
{
	struct mm81x_yaps *yaps = &mors->hif.u.yaps;

	if (yaps->flags & MM81X_HIF_FLAGS_COMMAND) {
		mm81x_skbq_finish(&yaps->cmd_q);
		mm81x_skbq_finish(&yaps->cmd_resp_q);
	}
}