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Message-Id: <20210315132501.441681-19-Jerome.Pouiller@silabs.com>
Date: Mon, 15 Mar 2021 14:24:55 +0100
From: Jerome Pouiller <Jerome.Pouiller@...abs.com>
To: linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Cc: devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Kalle Valo <kvalo@...eaurora.org>,
"David S . Miller" <davem@...emloft.net>,
devicetree@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
linux-mmc@...r.kernel.org,
Pali Rohár <pali@...nel.org>,
Ulf Hansson <ulf.hansson@...aro.org>,
Jérôme Pouiller
<jerome.pouiller@...abs.com>
Subject: [PATCH v5 18/24] wfx: add data_tx.c/data_tx.h
From: Jérôme Pouiller <jerome.pouiller@...abs.com>
Signed-off-by: Jérôme Pouiller <jerome.pouiller@...abs.com>
---
drivers/net/wireless/silabs/wfx/data_tx.c | 598 ++++++++++++++++++++++
drivers/net/wireless/silabs/wfx/data_tx.h | 68 +++
2 files changed, 666 insertions(+)
create mode 100644 drivers/net/wireless/silabs/wfx/data_tx.c
create mode 100644 drivers/net/wireless/silabs/wfx/data_tx.h
diff --git a/drivers/net/wireless/silabs/wfx/data_tx.c b/drivers/net/wireless/silabs/wfx/data_tx.c
new file mode 100644
index 000000000000..957fe4b21243
--- /dev/null
+++ b/drivers/net/wireless/silabs/wfx/data_tx.c
@@ -0,0 +1,598 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Datapath implementation.
+ *
+ * Copyright (c) 2017-2020, Silicon Laboratories, Inc.
+ * Copyright (c) 2010, ST-Ericsson
+ */
+#include <net/mac80211.h>
+#include <linux/etherdevice.h>
+
+#include "data_tx.h"
+#include "wfx.h"
+#include "bh.h"
+#include "sta.h"
+#include "queue.h"
+#include "debug.h"
+#include "traces.h"
+#include "hif_tx_mib.h"
+
+static int wfx_get_hw_rate(struct wfx_dev *wdev,
+ const struct ieee80211_tx_rate *rate)
+{
+ struct ieee80211_supported_band *band;
+
+ if (rate->idx < 0)
+ return -1;
+ if (rate->flags & IEEE80211_TX_RC_MCS) {
+ if (rate->idx > 7) {
+ WARN(1, "wrong rate->idx value: %d", rate->idx);
+ return -1;
+ }
+ return rate->idx + 14;
+ }
+ /* WFx only support 2GHz, else band information should be retrieved
+ * from ieee80211_tx_info
+ */
+ band = wdev->hw->wiphy->bands[NL80211_BAND_2GHZ];
+ if (rate->idx >= band->n_bitrates) {
+ WARN(1, "wrong rate->idx value: %d", rate->idx);
+ return -1;
+ }
+ return band->bitrates[rate->idx].hw_value;
+}
+
+/* TX policy cache implementation */
+
+static void wfx_tx_policy_build(struct wfx_vif *wvif, struct tx_policy *policy,
+ struct ieee80211_tx_rate *rates)
+{
+ struct wfx_dev *wdev = wvif->wdev;
+ int i, rateid;
+ u8 count;
+
+ WARN(rates[0].idx < 0, "invalid rate policy");
+ memset(policy, 0, sizeof(*policy));
+ for (i = 0; i < IEEE80211_TX_MAX_RATES; ++i) {
+ if (rates[i].idx < 0)
+ break;
+ WARN_ON(rates[i].count > 15);
+ rateid = wfx_get_hw_rate(wdev, &rates[i]);
+ /* Pack two values in each byte of policy->rates */
+ count = rates[i].count;
+ if (rateid % 2)
+ count <<= 4;
+ policy->rates[rateid / 2] |= count;
+ }
+}
+
+static bool tx_policy_is_equal(const struct tx_policy *a,
+ const struct tx_policy *b)
+{
+ return !memcmp(a->rates, b->rates, sizeof(a->rates));
+}
+
+static int wfx_tx_policy_find(struct tx_policy_cache *cache,
+ struct tx_policy *wanted)
+{
+ struct tx_policy *it;
+
+ list_for_each_entry(it, &cache->used, link)
+ if (tx_policy_is_equal(wanted, it))
+ return it - cache->cache;
+ list_for_each_entry(it, &cache->free, link)
+ if (tx_policy_is_equal(wanted, it))
+ return it - cache->cache;
+ return -1;
+}
+
+static void wfx_tx_policy_use(struct tx_policy_cache *cache,
+ struct tx_policy *entry)
+{
+ ++entry->usage_count;
+ list_move(&entry->link, &cache->used);
+}
+
+static int wfx_tx_policy_release(struct tx_policy_cache *cache,
+ struct tx_policy *entry)
+{
+ int ret = --entry->usage_count;
+
+ if (!ret)
+ list_move(&entry->link, &cache->free);
+ return ret;
+}
+
+static int wfx_tx_policy_get(struct wfx_vif *wvif,
+ struct ieee80211_tx_rate *rates, bool *renew)
+{
+ int idx;
+ struct tx_policy_cache *cache = &wvif->tx_policy_cache;
+ struct tx_policy wanted;
+
+ wfx_tx_policy_build(wvif, &wanted, rates);
+
+ spin_lock_bh(&cache->lock);
+ if (list_empty(&cache->free)) {
+ WARN(1, "unable to get a valid Tx policy");
+ spin_unlock_bh(&cache->lock);
+ return HIF_TX_RETRY_POLICY_INVALID;
+ }
+ idx = wfx_tx_policy_find(cache, &wanted);
+ if (idx >= 0) {
+ *renew = false;
+ } else {
+ struct tx_policy *entry;
+ *renew = true;
+ /* If policy is not found create a new one
+ * using the oldest entry in "free" list
+ */
+ entry = list_entry(cache->free.prev, struct tx_policy, link);
+ memcpy(entry->rates, wanted.rates, sizeof(entry->rates));
+ entry->uploaded = false;
+ entry->usage_count = 0;
+ idx = entry - cache->cache;
+ }
+ wfx_tx_policy_use(cache, &cache->cache[idx]);
+ if (list_empty(&cache->free))
+ ieee80211_stop_queues(wvif->wdev->hw);
+ spin_unlock_bh(&cache->lock);
+ return idx;
+}
+
+static void wfx_tx_policy_put(struct wfx_vif *wvif, int idx)
+{
+ int usage, locked;
+ struct tx_policy_cache *cache = &wvif->tx_policy_cache;
+
+ if (idx == HIF_TX_RETRY_POLICY_INVALID)
+ return;
+ spin_lock_bh(&cache->lock);
+ locked = list_empty(&cache->free);
+ usage = wfx_tx_policy_release(cache, &cache->cache[idx]);
+ if (locked && !usage)
+ ieee80211_wake_queues(wvif->wdev->hw);
+ spin_unlock_bh(&cache->lock);
+}
+
+static int wfx_tx_policy_upload(struct wfx_vif *wvif)
+{
+ struct tx_policy *policies = wvif->tx_policy_cache.cache;
+ u8 tmp_rates[12];
+ int i, is_used;
+
+ do {
+ spin_lock_bh(&wvif->tx_policy_cache.lock);
+ for (i = 0; i < ARRAY_SIZE(wvif->tx_policy_cache.cache); ++i) {
+ is_used = memzcmp(policies[i].rates,
+ sizeof(policies[i].rates));
+ if (!policies[i].uploaded && is_used)
+ break;
+ }
+ if (i < ARRAY_SIZE(wvif->tx_policy_cache.cache)) {
+ policies[i].uploaded = true;
+ memcpy(tmp_rates, policies[i].rates, sizeof(tmp_rates));
+ spin_unlock_bh(&wvif->tx_policy_cache.lock);
+ hif_set_tx_rate_retry_policy(wvif, i, tmp_rates);
+ } else {
+ spin_unlock_bh(&wvif->tx_policy_cache.lock);
+ }
+ } while (i < ARRAY_SIZE(wvif->tx_policy_cache.cache));
+ return 0;
+}
+
+void wfx_tx_policy_upload_work(struct work_struct *work)
+{
+ struct wfx_vif *wvif =
+ container_of(work, struct wfx_vif, tx_policy_upload_work);
+
+ wfx_tx_policy_upload(wvif);
+ wfx_tx_unlock(wvif->wdev);
+}
+
+void wfx_tx_policy_init(struct wfx_vif *wvif)
+{
+ struct tx_policy_cache *cache = &wvif->tx_policy_cache;
+ int i;
+
+ memset(cache, 0, sizeof(*cache));
+
+ spin_lock_init(&cache->lock);
+ INIT_LIST_HEAD(&cache->used);
+ INIT_LIST_HEAD(&cache->free);
+
+ for (i = 0; i < ARRAY_SIZE(cache->cache); ++i)
+ list_add(&cache->cache[i].link, &cache->free);
+}
+
+/* Tx implementation */
+
+static bool wfx_is_action_back(struct ieee80211_hdr *hdr)
+{
+ struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)hdr;
+
+ if (!ieee80211_is_action(mgmt->frame_control))
+ return false;
+ if (mgmt->u.action.category != WLAN_CATEGORY_BACK)
+ return false;
+ return true;
+}
+
+static u8 wfx_tx_get_link_id(struct wfx_vif *wvif, struct ieee80211_sta *sta,
+ struct ieee80211_hdr *hdr)
+{
+ struct wfx_sta_priv *sta_priv =
+ sta ? (struct wfx_sta_priv *)&sta->drv_priv : NULL;
+ const u8 *da = ieee80211_get_DA(hdr);
+
+ if (sta_priv && sta_priv->link_id)
+ return sta_priv->link_id;
+ if (wvif->vif->type != NL80211_IFTYPE_AP)
+ return 0;
+ if (is_multicast_ether_addr(da))
+ return 0;
+ return HIF_LINK_ID_NOT_ASSOCIATED;
+}
+
+static void wfx_tx_fixup_rates(struct ieee80211_tx_rate *rates)
+{
+ int i;
+ bool finished;
+
+ /* Firmware is not able to mix rates with different flags */
+ for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
+ if (rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
+ rates[i].flags |= IEEE80211_TX_RC_SHORT_GI;
+ if (!(rates[0].flags & IEEE80211_TX_RC_SHORT_GI))
+ rates[i].flags &= ~IEEE80211_TX_RC_SHORT_GI;
+ if (!(rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS))
+ rates[i].flags &= ~IEEE80211_TX_RC_USE_RTS_CTS;
+ }
+
+ /* Sort rates and remove duplicates */
+ do {
+ finished = true;
+ for (i = 0; i < IEEE80211_TX_MAX_RATES - 1; i++) {
+ if (rates[i + 1].idx == rates[i].idx &&
+ rates[i].idx != -1) {
+ rates[i].count += rates[i + 1].count;
+ if (rates[i].count > 15)
+ rates[i].count = 15;
+ rates[i + 1].idx = -1;
+ rates[i + 1].count = 0;
+
+ finished = false;
+ }
+ if (rates[i + 1].idx > rates[i].idx) {
+ swap(rates[i + 1], rates[i]);
+ finished = false;
+ }
+ }
+ } while (!finished);
+ /* Ensure that MCS0 or 1Mbps is present at the end of the retry list */
+ for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
+ if (rates[i].idx == 0)
+ break;
+ if (rates[i].idx == -1) {
+ rates[i].idx = 0;
+ rates[i].count = 8; /* == hw->max_rate_tries */
+ rates[i].flags = rates[i - 1].flags &
+ IEEE80211_TX_RC_MCS;
+ break;
+ }
+ }
+ /* All retries use long GI */
+ for (i = 1; i < IEEE80211_TX_MAX_RATES; i++)
+ rates[i].flags &= ~IEEE80211_TX_RC_SHORT_GI;
+}
+
+static u8 wfx_tx_get_rate_id(struct wfx_vif *wvif,
+ struct ieee80211_tx_info *tx_info)
+{
+ bool tx_policy_renew = false;
+ u8 rate_id;
+
+ rate_id = wfx_tx_policy_get(wvif,
+ tx_info->driver_rates, &tx_policy_renew);
+ if (rate_id == HIF_TX_RETRY_POLICY_INVALID)
+ dev_warn(wvif->wdev->dev, "unable to get a valid Tx policy");
+
+ if (tx_policy_renew) {
+ wfx_tx_lock(wvif->wdev);
+ if (!schedule_work(&wvif->tx_policy_upload_work))
+ wfx_tx_unlock(wvif->wdev);
+ }
+ return rate_id;
+}
+
+static int wfx_tx_get_frame_format(struct ieee80211_tx_info *tx_info)
+{
+ if (!(tx_info->driver_rates[0].flags & IEEE80211_TX_RC_MCS))
+ return HIF_FRAME_FORMAT_NON_HT;
+ else if (!(tx_info->driver_rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD))
+ return HIF_FRAME_FORMAT_MIXED_FORMAT_HT;
+ else
+ return HIF_FRAME_FORMAT_GF_HT_11N;
+}
+
+static int wfx_tx_get_icv_len(struct ieee80211_key_conf *hw_key)
+{
+ int mic_space;
+
+ if (!hw_key)
+ return 0;
+ if (hw_key->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
+ return 0;
+ mic_space = (hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) ? 8 : 0;
+ return hw_key->icv_len + mic_space;
+}
+
+static int wfx_tx_inner(struct wfx_vif *wvif, struct ieee80211_sta *sta,
+ struct sk_buff *skb)
+{
+ struct hif_msg *hif_msg;
+ struct hif_req_tx *req;
+ struct wfx_tx_priv *tx_priv;
+ struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_key_conf *hw_key = tx_info->control.hw_key;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+ int queue_id = skb_get_queue_mapping(skb);
+ size_t offset = (size_t)skb->data & 3;
+ int wmsg_len = sizeof(struct hif_msg) +
+ sizeof(struct hif_req_tx) + offset;
+
+ WARN(queue_id >= IEEE80211_NUM_ACS, "unsupported queue_id");
+ wfx_tx_fixup_rates(tx_info->driver_rates);
+
+ /* From now tx_info->control is unusable */
+ memset(tx_info->rate_driver_data, 0, sizeof(struct wfx_tx_priv));
+ /* Fill tx_priv */
+ tx_priv = (struct wfx_tx_priv *)tx_info->rate_driver_data;
+ tx_priv->icv_size = wfx_tx_get_icv_len(hw_key);
+
+ /* Fill hif_msg */
+ WARN(skb_headroom(skb) < wmsg_len, "not enough space in skb");
+ WARN(offset & 1, "attempt to transmit an unaligned frame");
+ skb_put(skb, tx_priv->icv_size);
+ skb_push(skb, wmsg_len);
+ memset(skb->data, 0, wmsg_len);
+ hif_msg = (struct hif_msg *)skb->data;
+ hif_msg->len = cpu_to_le16(skb->len);
+ hif_msg->id = HIF_REQ_ID_TX;
+ hif_msg->interface = wvif->id;
+ if (skb->len > wvif->wdev->hw_caps.size_inp_ch_buf) {
+ dev_warn(wvif->wdev->dev,
+ "requested frame size (%d) is larger than maximum supported (%d)\n",
+ skb->len, wvif->wdev->hw_caps.size_inp_ch_buf);
+ skb_pull(skb, wmsg_len);
+ return -EIO;
+ }
+
+ /* Fill tx request */
+ req = (struct hif_req_tx *)hif_msg->body;
+ /* packet_id just need to be unique on device. 32bits are more than
+ * necessary for that task, so we take advantage of it to add some extra
+ * data for debug.
+ */
+ req->packet_id = atomic_add_return(1, &wvif->wdev->packet_id) & 0xFFFF;
+ req->packet_id |= IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl)) << 16;
+ req->packet_id |= queue_id << 28;
+
+ req->fc_offset = offset;
+ if (tx_info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM)
+ req->after_dtim = 1;
+ req->peer_sta_id = wfx_tx_get_link_id(wvif, sta, hdr);
+ /* Queue index are inverted between firmware and Linux */
+ req->queue_id = 3 - queue_id;
+ req->retry_policy_index = wfx_tx_get_rate_id(wvif, tx_info);
+ req->frame_format = wfx_tx_get_frame_format(tx_info);
+ if (tx_info->driver_rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
+ req->short_gi = 1;
+
+ /* Auxiliary operations */
+ wfx_tx_queues_put(wvif, skb);
+ if (tx_info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM)
+ schedule_work(&wvif->update_tim_work);
+ wfx_bh_request_tx(wvif->wdev);
+ return 0;
+}
+
+void wfx_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control,
+ struct sk_buff *skb)
+{
+ struct wfx_dev *wdev = hw->priv;
+ struct wfx_vif *wvif;
+ struct ieee80211_sta *sta = control ? control->sta : NULL;
+ struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+ size_t driver_data_room = sizeof_field(struct ieee80211_tx_info,
+ rate_driver_data);
+
+ BUILD_BUG_ON_MSG(sizeof(struct wfx_tx_priv) > driver_data_room,
+ "struct tx_priv is too large");
+ WARN(skb->next || skb->prev, "skb is already member of a list");
+ /* control.vif can be NULL for injected frames */
+ if (tx_info->control.vif)
+ wvif = (struct wfx_vif *)tx_info->control.vif->drv_priv;
+ else
+ wvif = wvif_iterate(wdev, NULL);
+ if (WARN_ON(!wvif))
+ goto drop;
+ /* Because of TX_AMPDU_SETUP_IN_HW, mac80211 does not try to send any
+ * BlockAck session management frame. The check below exist just in case.
+ */
+ if (wfx_is_action_back(hdr)) {
+ dev_info(wdev->dev, "drop BA action\n");
+ goto drop;
+ }
+ if (wfx_tx_inner(wvif, sta, skb))
+ goto drop;
+
+ return;
+
+drop:
+ ieee80211_tx_status_irqsafe(wdev->hw, skb);
+}
+
+static void wfx_skb_dtor(struct wfx_vif *wvif, struct sk_buff *skb)
+{
+ struct hif_msg *hif = (struct hif_msg *)skb->data;
+ struct hif_req_tx *req = (struct hif_req_tx *)hif->body;
+ unsigned int offset = sizeof(struct hif_msg) +
+ sizeof(struct hif_req_tx) +
+ req->fc_offset;
+
+ if (!wvif) {
+ pr_warn("vif associated with the skb does not exist anymore\n");
+ return;
+ }
+ wfx_tx_policy_put(wvif, req->retry_policy_index);
+ skb_pull(skb, offset);
+ ieee80211_tx_status_irqsafe(wvif->wdev->hw, skb);
+}
+
+static void wfx_tx_fill_rates(struct wfx_dev *wdev,
+ struct ieee80211_tx_info *tx_info,
+ const struct hif_cnf_tx *arg)
+{
+ struct ieee80211_tx_rate *rate;
+ int tx_count;
+ int i;
+
+ tx_count = arg->ack_failures;
+ if (!arg->status || arg->ack_failures)
+ tx_count += 1; /* Also report success */
+ for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
+ rate = &tx_info->status.rates[i];
+ if (rate->idx < 0)
+ break;
+ if (tx_count < rate->count &&
+ arg->status == HIF_STATUS_TX_FAIL_RETRIES &&
+ arg->ack_failures)
+ dev_dbg(wdev->dev, "all retries were not consumed: %d != %d\n",
+ rate->count, tx_count);
+ if (tx_count <= rate->count && tx_count &&
+ arg->txed_rate != wfx_get_hw_rate(wdev, rate))
+ dev_dbg(wdev->dev, "inconsistent tx_info rates: %d != %d\n",
+ arg->txed_rate, wfx_get_hw_rate(wdev, rate));
+ if (tx_count > rate->count) {
+ tx_count -= rate->count;
+ } else if (!tx_count) {
+ rate->count = 0;
+ rate->idx = -1;
+ } else {
+ rate->count = tx_count;
+ tx_count = 0;
+ }
+ }
+ if (tx_count)
+ dev_dbg(wdev->dev, "%d more retries than expected\n", tx_count);
+}
+
+void wfx_tx_confirm_cb(struct wfx_dev *wdev, const struct hif_cnf_tx *arg)
+{
+ const struct wfx_tx_priv *tx_priv;
+ struct ieee80211_tx_info *tx_info;
+ struct wfx_vif *wvif;
+ struct sk_buff *skb;
+
+ skb = wfx_pending_get(wdev, arg->packet_id);
+ if (!skb) {
+ dev_warn(wdev->dev, "received unknown packet_id (%#.8x) from chip\n",
+ arg->packet_id);
+ return;
+ }
+ tx_info = IEEE80211_SKB_CB(skb);
+ tx_priv = wfx_skb_tx_priv(skb);
+ wvif = wdev_to_wvif(wdev, ((struct hif_msg *)skb->data)->interface);
+ WARN_ON(!wvif);
+ if (!wvif)
+ return;
+
+ /* Note that wfx_pending_get_pkt_us_delay() get data from tx_info */
+ _trace_tx_stats(arg, skb, wfx_pending_get_pkt_us_delay(wdev, skb));
+ wfx_tx_fill_rates(wdev, tx_info, arg);
+ skb_trim(skb, skb->len - tx_priv->icv_size);
+
+ /* From now, you can touch to tx_info->status, but do not touch to
+ * tx_priv anymore
+ */
+ /* FIXME: use ieee80211_tx_info_clear_status() */
+ memset(tx_info->rate_driver_data, 0, sizeof(tx_info->rate_driver_data));
+ memset(tx_info->pad, 0, sizeof(tx_info->pad));
+
+ if (!arg->status) {
+ tx_info->status.tx_time =
+ le32_to_cpu(arg->media_delay) -
+ le32_to_cpu(arg->tx_queue_delay);
+ if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK)
+ tx_info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
+ else
+ tx_info->flags |= IEEE80211_TX_STAT_ACK;
+ } else if (arg->status == HIF_STATUS_TX_FAIL_REQUEUE) {
+ WARN(!arg->requeue, "incoherent status and result_flags");
+ if (tx_info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
+ /* DTIM period elapsed */
+ wvif->after_dtim_tx_allowed = false;
+ schedule_work(&wvif->update_tim_work);
+ }
+ tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
+ }
+ wfx_skb_dtor(wvif, skb);
+}
+
+static void wfx_flush_vif(struct wfx_vif *wvif, u32 queues,
+ struct sk_buff_head *dropped)
+{
+ struct wfx_queue *queue;
+ int i;
+
+ for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+ if (!(BIT(i) & queues))
+ continue;
+ queue = &wvif->tx_queue[i];
+ if (dropped)
+ wfx_tx_queue_drop(wvif, queue, dropped);
+ }
+ if (wvif->wdev->chip_frozen)
+ return;
+ for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+ if (!(BIT(i) & queues))
+ continue;
+ queue = &wvif->tx_queue[i];
+ if (wait_event_timeout(wvif->wdev->tx_dequeue,
+ wfx_tx_queue_empty(wvif, queue),
+ msecs_to_jiffies(1000)) <= 0)
+ dev_warn(wvif->wdev->dev,
+ "frames queued while flushing tx queues?");
+ }
+}
+
+void wfx_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+ u32 queues, bool drop)
+{
+ struct wfx_dev *wdev = hw->priv;
+ struct sk_buff_head dropped;
+ struct wfx_vif *wvif;
+ struct hif_msg *hif;
+ struct sk_buff *skb;
+
+ skb_queue_head_init(&dropped);
+ if (vif) {
+ wvif = (struct wfx_vif *)vif->drv_priv;
+ wfx_flush_vif(wvif, queues, drop ? &dropped : NULL);
+ } else {
+ wvif = NULL;
+ while ((wvif = wvif_iterate(wdev, wvif)) != NULL)
+ wfx_flush_vif(wvif, queues, drop ? &dropped : NULL);
+ }
+ wfx_tx_flush(wdev);
+ if (wdev->chip_frozen)
+ wfx_pending_drop(wdev, &dropped);
+ while ((skb = skb_dequeue(&dropped)) != NULL) {
+ hif = (struct hif_msg *)skb->data;
+ wvif = wdev_to_wvif(wdev, hif->interface);
+ ieee80211_tx_info_clear_status(IEEE80211_SKB_CB(skb));
+ wfx_skb_dtor(wvif, skb);
+ }
+}
diff --git a/drivers/net/wireless/silabs/wfx/data_tx.h b/drivers/net/wireless/silabs/wfx/data_tx.h
new file mode 100644
index 000000000000..6becf1f86767
--- /dev/null
+++ b/drivers/net/wireless/silabs/wfx/data_tx.h
@@ -0,0 +1,68 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Datapath implementation.
+ *
+ * Copyright (c) 2017-2020, Silicon Laboratories, Inc.
+ * Copyright (c) 2010, ST-Ericsson
+ */
+#ifndef WFX_DATA_TX_H
+#define WFX_DATA_TX_H
+
+#include <linux/list.h>
+#include <net/mac80211.h>
+
+#include "hif_api_cmd.h"
+#include "hif_api_mib.h"
+
+struct wfx_tx_priv;
+struct wfx_dev;
+struct wfx_vif;
+
+struct tx_policy {
+ struct list_head link;
+ int usage_count;
+ u8 rates[12];
+ bool uploaded;
+};
+
+struct tx_policy_cache {
+ struct tx_policy cache[HIF_TX_RETRY_POLICY_MAX];
+ /* FIXME: use a trees and drop hash from tx_policy */
+ struct list_head used;
+ struct list_head free;
+ spinlock_t lock;
+};
+
+struct wfx_tx_priv {
+ ktime_t xmit_timestamp;
+ unsigned char icv_size;
+};
+
+void wfx_tx_policy_init(struct wfx_vif *wvif);
+void wfx_tx_policy_upload_work(struct work_struct *work);
+
+void wfx_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control,
+ struct sk_buff *skb);
+void wfx_tx_confirm_cb(struct wfx_dev *wdev, const struct hif_cnf_tx *arg);
+void wfx_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+ u32 queues, bool drop);
+
+static inline struct wfx_tx_priv *wfx_skb_tx_priv(struct sk_buff *skb)
+{
+ struct ieee80211_tx_info *tx_info;
+
+ if (!skb)
+ return NULL;
+ tx_info = IEEE80211_SKB_CB(skb);
+ return (struct wfx_tx_priv *)tx_info->rate_driver_data;
+}
+
+static inline struct hif_req_tx *wfx_skb_txreq(struct sk_buff *skb)
+{
+ struct hif_msg *hif = (struct hif_msg *)skb->data;
+ struct hif_req_tx *req = (struct hif_req_tx *)hif->body;
+
+ return req;
+}
+
+#endif
--
2.30.2
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