From 4a5fb1bbcdf1cccae1f6b9c0277b3796b2a468ef Mon Sep 17 00:00:00 2001 From: Jérôme Pouiller Date: Sat, 26 Feb 2022 10:21:42 +0100 Subject: wfx: get out from the staging area MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The wfx driver is now mature enough to leave the staging area. Signed-off-by: Jérôme Pouiller Signed-off-by: Kalle Valo --- drivers/staging/wfx/data_tx.c | 568 ------------------------------------------ 1 file changed, 568 deletions(-) delete mode 100644 drivers/staging/wfx/data_tx.c (limited to 'drivers/staging/wfx/data_tx.c') diff --git a/drivers/staging/wfx/data_tx.c b/drivers/staging/wfx/data_tx.c deleted file mode 100644 index e07381b2ff4d..000000000000 --- a/drivers/staging/wfx/data_tx.c +++ /dev/null @@ -1,568 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Data transmitting implementation. - * - * Copyright (c) 2017-2020, Silicon Laboratories, Inc. - * Copyright (c) 2010, ST-Ericsson - */ -#include -#include - -#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; - } - /* The device 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 wfx_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 wfx_tx_policy_is_equal(const struct wfx_tx_policy *a, const struct wfx_tx_policy *b) -{ - return !memcmp(a->rates, b->rates, sizeof(a->rates)); -} - -static int wfx_tx_policy_find(struct wfx_tx_policy_cache *cache, struct wfx_tx_policy *wanted) -{ - struct wfx_tx_policy *it; - - list_for_each_entry(it, &cache->used, link) - if (wfx_tx_policy_is_equal(wanted, it)) - return it - cache->cache; - list_for_each_entry(it, &cache->free, link) - if (wfx_tx_policy_is_equal(wanted, it)) - return it - cache->cache; - return -1; -} - -static void wfx_tx_policy_use(struct wfx_tx_policy_cache *cache, struct wfx_tx_policy *entry) -{ - ++entry->usage_count; - list_move(&entry->link, &cache->used); -} - -static int wfx_tx_policy_release(struct wfx_tx_policy_cache *cache, struct wfx_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 wfx_tx_policy_cache *cache = &wvif->tx_policy_cache; - struct wfx_tx_policy wanted; - struct wfx_tx_policy *entry; - - 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 { - /* If policy is not found create a new one using the oldest entry in "free" list */ - *renew = true; - entry = list_entry(cache->free.prev, struct wfx_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 wfx_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 wfx_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); - wfx_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 wfx_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_retry_policy_id(struct wfx_vif *wvif, struct ieee80211_tx_info *tx_info) -{ - bool tx_policy_renew = false; - u8 ret; - - ret = wfx_tx_policy_get(wvif, tx_info->driver_rates, &tx_policy_renew); - if (ret == 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 ret; -} - -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 wfx_hif_msg *hif_msg; - struct wfx_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 wfx_hif_msg) + sizeof(struct wfx_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 wfx_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 > le16_to_cpu(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, le16_to_cpu(wvif->wdev->hw_caps.size_inp_ch_buf)); - skb_pull(skb, wmsg_len); - return -EIO; - } - - /* Fill tx request */ - req = (struct wfx_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; - /* Queue index are inverted between firmware and Linux */ - req->queue_id = 3 - queue_id; - req->peer_sta_id = wfx_tx_get_link_id(wvif, sta, hdr); - req->retry_policy_index = wfx_tx_get_retry_policy_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; - if (tx_info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) - req->after_dtim = 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 wfx_hif_msg *hif = (struct wfx_hif_msg *)skb->data; - struct wfx_hif_req_tx *req = (struct wfx_hif_req_tx *)hif->body; - unsigned int offset = sizeof(struct wfx_hif_msg) + sizeof(struct wfx_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 wfx_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 wfx_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 wfx_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) { - wvif->after_dtim_tx_allowed = false; /* DTIM period elapsed */ - 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 wfx_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 wfx_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); - } -} -- cgit v1.2.3-59-g8ed1b