diff options
Diffstat (limited to 'drivers/staging/wfx/queue.c')
-rw-r--r-- | drivers/staging/wfx/queue.c | 307 |
1 files changed, 0 insertions, 307 deletions
diff --git a/drivers/staging/wfx/queue.c b/drivers/staging/wfx/queue.c deleted file mode 100644 index 7a3ba3c38925..000000000000 --- a/drivers/staging/wfx/queue.c +++ /dev/null @@ -1,307 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Queue between the tx operation and the bh workqueue. - * - * Copyright (c) 2017-2020, Silicon Laboratories, Inc. - * Copyright (c) 2010, ST-Ericsson - */ -#include <linux/sched.h> -#include <net/mac80211.h> - -#include "queue.h" -#include "wfx.h" -#include "sta.h" -#include "data_tx.h" -#include "traces.h" - -void wfx_tx_lock(struct wfx_dev *wdev) -{ - atomic_inc(&wdev->tx_lock); -} - -void wfx_tx_unlock(struct wfx_dev *wdev) -{ - int tx_lock = atomic_dec_return(&wdev->tx_lock); - - WARN(tx_lock < 0, "inconsistent tx_lock value"); - if (!tx_lock) - wfx_bh_request_tx(wdev); -} - -void wfx_tx_flush(struct wfx_dev *wdev) -{ - int ret; - - /* Do not wait for any reply if chip is frozen */ - if (wdev->chip_frozen) - return; - - wfx_tx_lock(wdev); - mutex_lock(&wdev->hif_cmd.lock); - ret = wait_event_timeout(wdev->hif.tx_buffers_empty, - !wdev->hif.tx_buffers_used, - msecs_to_jiffies(3000)); - if (!ret) { - dev_warn(wdev->dev, "cannot flush tx buffers (%d still busy)\n", - wdev->hif.tx_buffers_used); - wfx_pending_dump_old_frames(wdev, 3000); - /* FIXME: drop pending frames here */ - wdev->chip_frozen = true; - } - mutex_unlock(&wdev->hif_cmd.lock); - wfx_tx_unlock(wdev); -} - -void wfx_tx_lock_flush(struct wfx_dev *wdev) -{ - wfx_tx_lock(wdev); - wfx_tx_flush(wdev); -} - -void wfx_tx_queues_init(struct wfx_vif *wvif) -{ - /* The device is in charge to respect the details of the QoS parameters. - * The driver just ensure that it roughtly respect the priorities to - * avoid any shortage. - */ - const int priorities[IEEE80211_NUM_ACS] = { 1, 2, 64, 128 }; - int i; - - for (i = 0; i < IEEE80211_NUM_ACS; ++i) { - skb_queue_head_init(&wvif->tx_queue[i].normal); - skb_queue_head_init(&wvif->tx_queue[i].cab); - wvif->tx_queue[i].priority = priorities[i]; - } -} - -bool wfx_tx_queue_empty(struct wfx_vif *wvif, struct wfx_queue *queue) -{ - return skb_queue_empty_lockless(&queue->normal) && - skb_queue_empty_lockless(&queue->cab); -} - -void wfx_tx_queues_check_empty(struct wfx_vif *wvif) -{ - int i; - - for (i = 0; i < IEEE80211_NUM_ACS; ++i) { - WARN_ON(atomic_read(&wvif->tx_queue[i].pending_frames)); - WARN_ON(!wfx_tx_queue_empty(wvif, &wvif->tx_queue[i])); - } -} - -static void __wfx_tx_queue_drop(struct wfx_vif *wvif, - struct sk_buff_head *skb_queue, - struct sk_buff_head *dropped) -{ - struct sk_buff *skb, *tmp; - - spin_lock_bh(&skb_queue->lock); - skb_queue_walk_safe(skb_queue, skb, tmp) { - __skb_unlink(skb, skb_queue); - skb_queue_head(dropped, skb); - } - spin_unlock_bh(&skb_queue->lock); -} - -void wfx_tx_queue_drop(struct wfx_vif *wvif, struct wfx_queue *queue, - struct sk_buff_head *dropped) -{ - __wfx_tx_queue_drop(wvif, &queue->cab, dropped); - __wfx_tx_queue_drop(wvif, &queue->normal, dropped); - wake_up(&wvif->wdev->tx_dequeue); -} - -void wfx_tx_queues_put(struct wfx_vif *wvif, struct sk_buff *skb) -{ - struct wfx_queue *queue = &wvif->tx_queue[skb_get_queue_mapping(skb)]; - struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); - - if (tx_info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) - skb_queue_tail(&queue->cab, skb); - else - skb_queue_tail(&queue->normal, skb); -} - -void wfx_pending_drop(struct wfx_dev *wdev, struct sk_buff_head *dropped) -{ - struct wfx_queue *queue; - struct wfx_vif *wvif; - struct hif_msg *hif; - struct sk_buff *skb; - - WARN(!wdev->chip_frozen, "%s should only be used to recover a frozen device", - __func__); - while ((skb = skb_dequeue(&wdev->tx_pending)) != NULL) { - hif = (struct hif_msg *)skb->data; - wvif = wdev_to_wvif(wdev, hif->interface); - if (wvif) { - queue = &wvif->tx_queue[skb_get_queue_mapping(skb)]; - WARN_ON(skb_get_queue_mapping(skb) > 3); - WARN_ON(!atomic_read(&queue->pending_frames)); - atomic_dec(&queue->pending_frames); - } - skb_queue_head(dropped, skb); - } -} - -struct sk_buff *wfx_pending_get(struct wfx_dev *wdev, u32 packet_id) -{ - struct wfx_queue *queue; - struct hif_req_tx *req; - struct wfx_vif *wvif; - struct hif_msg *hif; - struct sk_buff *skb; - - spin_lock_bh(&wdev->tx_pending.lock); - skb_queue_walk(&wdev->tx_pending, skb) { - hif = (struct hif_msg *)skb->data; - req = (struct hif_req_tx *)hif->body; - if (req->packet_id != packet_id) - continue; - spin_unlock_bh(&wdev->tx_pending.lock); - wvif = wdev_to_wvif(wdev, hif->interface); - if (wvif) { - queue = &wvif->tx_queue[skb_get_queue_mapping(skb)]; - WARN_ON(skb_get_queue_mapping(skb) > 3); - WARN_ON(!atomic_read(&queue->pending_frames)); - atomic_dec(&queue->pending_frames); - } - skb_unlink(skb, &wdev->tx_pending); - return skb; - } - spin_unlock_bh(&wdev->tx_pending.lock); - WARN(1, "cannot find packet in pending queue"); - return NULL; -} - -void wfx_pending_dump_old_frames(struct wfx_dev *wdev, unsigned int limit_ms) -{ - ktime_t now = ktime_get(); - struct wfx_tx_priv *tx_priv; - struct hif_req_tx *req; - struct sk_buff *skb; - bool first = true; - - spin_lock_bh(&wdev->tx_pending.lock); - skb_queue_walk(&wdev->tx_pending, skb) { - tx_priv = wfx_skb_tx_priv(skb); - req = wfx_skb_txreq(skb); - if (ktime_after(now, ktime_add_ms(tx_priv->xmit_timestamp, - limit_ms))) { - if (first) { - dev_info(wdev->dev, "frames stuck in firmware since %dms or more:\n", - limit_ms); - first = false; - } - dev_info(wdev->dev, " id %08x sent %lldms ago\n", - req->packet_id, - ktime_ms_delta(now, tx_priv->xmit_timestamp)); - } - } - spin_unlock_bh(&wdev->tx_pending.lock); -} - -unsigned int wfx_pending_get_pkt_us_delay(struct wfx_dev *wdev, - struct sk_buff *skb) -{ - ktime_t now = ktime_get(); - struct wfx_tx_priv *tx_priv = wfx_skb_tx_priv(skb); - - return ktime_us_delta(now, tx_priv->xmit_timestamp); -} - -bool wfx_tx_queues_has_cab(struct wfx_vif *wvif) -{ - int i; - - if (wvif->vif->type != NL80211_IFTYPE_AP) - return false; - for (i = 0; i < IEEE80211_NUM_ACS; ++i) - /* Note: since only AP can have mcast frames in queue and only - * one vif can be AP, all queued frames has same interface id - */ - if (!skb_queue_empty_lockless(&wvif->tx_queue[i].cab)) - return true; - return false; -} - -static int wfx_tx_queue_get_weight(struct wfx_queue *queue) -{ - return atomic_read(&queue->pending_frames) * queue->priority; -} - -static struct sk_buff *wfx_tx_queues_get_skb(struct wfx_dev *wdev) -{ - struct wfx_queue *queues[IEEE80211_NUM_ACS * ARRAY_SIZE(wdev->vif)]; - int i, j, num_queues = 0; - struct wfx_vif *wvif; - struct hif_msg *hif; - struct sk_buff *skb; - - /* sort the queues */ - wvif = NULL; - while ((wvif = wvif_iterate(wdev, wvif)) != NULL) { - for (i = 0; i < IEEE80211_NUM_ACS; i++) { - WARN_ON(num_queues >= ARRAY_SIZE(queues)); - queues[num_queues] = &wvif->tx_queue[i]; - for (j = num_queues; j > 0; j--) - if (wfx_tx_queue_get_weight(queues[j]) < - wfx_tx_queue_get_weight(queues[j - 1])) - swap(queues[j - 1], queues[j]); - num_queues++; - } - } - - wvif = NULL; - while ((wvif = wvif_iterate(wdev, wvif)) != NULL) { - if (!wvif->after_dtim_tx_allowed) - continue; - for (i = 0; i < num_queues; i++) { - skb = skb_dequeue(&queues[i]->cab); - if (!skb) - continue; - /* Note: since only AP can have mcast frames in queue - * and only one vif can be AP, all queued frames has - * same interface id - */ - hif = (struct hif_msg *)skb->data; - WARN_ON(hif->interface != wvif->id); - WARN_ON(queues[i] != - &wvif->tx_queue[skb_get_queue_mapping(skb)]); - atomic_inc(&queues[i]->pending_frames); - trace_queues_stats(wdev, queues[i]); - return skb; - } - /* No more multicast to sent */ - wvif->after_dtim_tx_allowed = false; - schedule_work(&wvif->update_tim_work); - } - - for (i = 0; i < num_queues; i++) { - skb = skb_dequeue(&queues[i]->normal); - if (skb) { - atomic_inc(&queues[i]->pending_frames); - trace_queues_stats(wdev, queues[i]); - return skb; - } - } - return NULL; -} - -struct hif_msg *wfx_tx_queues_get(struct wfx_dev *wdev) -{ - struct wfx_tx_priv *tx_priv; - struct sk_buff *skb; - - if (atomic_read(&wdev->tx_lock)) - return NULL; - skb = wfx_tx_queues_get_skb(wdev); - if (!skb) - return NULL; - skb_queue_tail(&wdev->tx_pending, skb); - wake_up(&wdev->tx_dequeue); - tx_priv = wfx_skb_tx_priv(skb); - tx_priv->xmit_timestamp = ktime_get(); - return (struct hif_msg *)skb->data; -} |