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path: root/drivers/net/wireless/cw1200/txrx.c
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Diffstat (limited to 'drivers/net/wireless/cw1200/txrx.c')
-rw-r--r--drivers/net/wireless/cw1200/txrx.c1472
1 files changed, 0 insertions, 1472 deletions
diff --git a/drivers/net/wireless/cw1200/txrx.c b/drivers/net/wireless/cw1200/txrx.c
deleted file mode 100644
index d28bd49cb..000000000
--- a/drivers/net/wireless/cw1200/txrx.c
+++ /dev/null
@@ -1,1472 +0,0 @@
-/*
- * Datapath implementation for ST-Ericsson CW1200 mac80211 drivers
- *
- * Copyright (c) 2010, ST-Ericsson
- * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <net/mac80211.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-
-#include "cw1200.h"
-#include "wsm.h"
-#include "bh.h"
-#include "sta.h"
-#include "debug.h"
-
-#define CW1200_INVALID_RATE_ID (0xFF)
-
-static int cw1200_handle_action_rx(struct cw1200_common *priv,
- struct sk_buff *skb);
-static const struct ieee80211_rate *
-cw1200_get_tx_rate(const struct cw1200_common *priv,
- const struct ieee80211_tx_rate *rate);
-
-/* ******************************************************************** */
-/* TX queue lock / unlock */
-
-static inline void cw1200_tx_queues_lock(struct cw1200_common *priv)
-{
- int i;
- for (i = 0; i < 4; ++i)
- cw1200_queue_lock(&priv->tx_queue[i]);
-}
-
-static inline void cw1200_tx_queues_unlock(struct cw1200_common *priv)
-{
- int i;
- for (i = 0; i < 4; ++i)
- cw1200_queue_unlock(&priv->tx_queue[i]);
-}
-
-/* ******************************************************************** */
-/* TX policy cache implementation */
-
-static void tx_policy_dump(struct tx_policy *policy)
-{
- pr_debug("[TX policy] %.1X%.1X%.1X%.1X%.1X%.1X%.1X%.1X %.1X%.1X%.1X%.1X%.1X%.1X%.1X%.1X %.1X%.1X%.1X%.1X%.1X%.1X%.1X%.1X: %d\n",
- policy->raw[0] & 0x0F, policy->raw[0] >> 4,
- policy->raw[1] & 0x0F, policy->raw[1] >> 4,
- policy->raw[2] & 0x0F, policy->raw[2] >> 4,
- policy->raw[3] & 0x0F, policy->raw[3] >> 4,
- policy->raw[4] & 0x0F, policy->raw[4] >> 4,
- policy->raw[5] & 0x0F, policy->raw[5] >> 4,
- policy->raw[6] & 0x0F, policy->raw[6] >> 4,
- policy->raw[7] & 0x0F, policy->raw[7] >> 4,
- policy->raw[8] & 0x0F, policy->raw[8] >> 4,
- policy->raw[9] & 0x0F, policy->raw[9] >> 4,
- policy->raw[10] & 0x0F, policy->raw[10] >> 4,
- policy->raw[11] & 0x0F, policy->raw[11] >> 4,
- policy->defined);
-}
-
-static void tx_policy_build(const struct cw1200_common *priv,
- /* [out] */ struct tx_policy *policy,
- struct ieee80211_tx_rate *rates, size_t count)
-{
- int i, j;
- unsigned limit = priv->short_frame_max_tx_count;
- unsigned total = 0;
- BUG_ON(rates[0].idx < 0);
- memset(policy, 0, sizeof(*policy));
-
- /* Sort rates in descending order. */
- for (i = 1; i < count; ++i) {
- if (rates[i].idx < 0) {
- count = i;
- break;
- }
- if (rates[i].idx > rates[i - 1].idx) {
- struct ieee80211_tx_rate tmp = rates[i - 1];
- rates[i - 1] = rates[i];
- rates[i] = tmp;
- }
- }
-
- /* Eliminate duplicates. */
- total = rates[0].count;
- for (i = 0, j = 1; j < count; ++j) {
- if (rates[j].idx == rates[i].idx) {
- rates[i].count += rates[j].count;
- } else if (rates[j].idx > rates[i].idx) {
- break;
- } else {
- ++i;
- if (i != j)
- rates[i] = rates[j];
- }
- total += rates[j].count;
- }
- count = i + 1;
-
- /* Re-fill policy trying to keep every requested rate and with
- * respect to the global max tx retransmission count.
- */
- if (limit < count)
- limit = count;
- if (total > limit) {
- for (i = 0; i < count; ++i) {
- int left = count - i - 1;
- if (rates[i].count > limit - left)
- rates[i].count = limit - left;
- limit -= rates[i].count;
- }
- }
-
- /* HACK!!! Device has problems (at least) switching from
- * 54Mbps CTS to 1Mbps. This switch takes enormous amount
- * of time (100-200 ms), leading to valuable throughput drop.
- * As a workaround, additional g-rates are injected to the
- * policy.
- */
- if (count == 2 && !(rates[0].flags & IEEE80211_TX_RC_MCS) &&
- rates[0].idx > 4 && rates[0].count > 2 &&
- rates[1].idx < 2) {
- int mid_rate = (rates[0].idx + 4) >> 1;
-
- /* Decrease number of retries for the initial rate */
- rates[0].count -= 2;
-
- if (mid_rate != 4) {
- /* Keep fallback rate at 1Mbps. */
- rates[3] = rates[1];
-
- /* Inject 1 transmission on lowest g-rate */
- rates[2].idx = 4;
- rates[2].count = 1;
- rates[2].flags = rates[1].flags;
-
- /* Inject 1 transmission on mid-rate */
- rates[1].idx = mid_rate;
- rates[1].count = 1;
-
- /* Fallback to 1 Mbps is a really bad thing,
- * so let's try to increase probability of
- * successful transmission on the lowest g rate
- * even more
- */
- if (rates[0].count >= 3) {
- --rates[0].count;
- ++rates[2].count;
- }
-
- /* Adjust amount of rates defined */
- count += 2;
- } else {
- /* Keep fallback rate at 1Mbps. */
- rates[2] = rates[1];
-
- /* Inject 2 transmissions on lowest g-rate */
- rates[1].idx = 4;
- rates[1].count = 2;
-
- /* Adjust amount of rates defined */
- count += 1;
- }
- }
-
- policy->defined = cw1200_get_tx_rate(priv, &rates[0])->hw_value + 1;
-
- for (i = 0; i < count; ++i) {
- register unsigned rateid, off, shift, retries;
-
- rateid = cw1200_get_tx_rate(priv, &rates[i])->hw_value;
- off = rateid >> 3; /* eq. rateid / 8 */
- shift = (rateid & 0x07) << 2; /* eq. (rateid % 8) * 4 */
-
- retries = rates[i].count;
- if (retries > 0x0F) {
- rates[i].count = 0x0f;
- retries = 0x0F;
- }
- policy->tbl[off] |= __cpu_to_le32(retries << shift);
- policy->retry_count += retries;
- }
-
- pr_debug("[TX policy] Policy (%zu): %d:%d, %d:%d, %d:%d, %d:%d\n",
- count,
- rates[0].idx, rates[0].count,
- rates[1].idx, rates[1].count,
- rates[2].idx, rates[2].count,
- rates[3].idx, rates[3].count);
-}
-
-static inline bool tx_policy_is_equal(const struct tx_policy *wanted,
- const struct tx_policy *cached)
-{
- size_t count = wanted->defined >> 1;
- if (wanted->defined > cached->defined)
- return false;
- if (count) {
- if (memcmp(wanted->raw, cached->raw, count))
- return false;
- }
- if (wanted->defined & 1) {
- if ((wanted->raw[count] & 0x0F) != (cached->raw[count] & 0x0F))
- return false;
- }
- return true;
-}
-
-static int tx_policy_find(struct tx_policy_cache *cache,
- const struct tx_policy *wanted)
-{
- /* O(n) complexity. Not so good, but there's only 8 entries in
- * the cache.
- * Also lru helps to reduce search time.
- */
- struct tx_policy_cache_entry *it;
- /* First search for policy in "used" list */
- list_for_each_entry(it, &cache->used, link) {
- if (tx_policy_is_equal(wanted, &it->policy))
- return it - cache->cache;
- }
- /* Then - in "free list" */
- list_for_each_entry(it, &cache->free, link) {
- if (tx_policy_is_equal(wanted, &it->policy))
- return it - cache->cache;
- }
- return -1;
-}
-
-static inline void tx_policy_use(struct tx_policy_cache *cache,
- struct tx_policy_cache_entry *entry)
-{
- ++entry->policy.usage_count;
- list_move(&entry->link, &cache->used);
-}
-
-static inline int tx_policy_release(struct tx_policy_cache *cache,
- struct tx_policy_cache_entry *entry)
-{
- int ret = --entry->policy.usage_count;
- if (!ret)
- list_move(&entry->link, &cache->free);
- return ret;
-}
-
-void tx_policy_clean(struct cw1200_common *priv)
-{
- int idx, locked;
- struct tx_policy_cache *cache = &priv->tx_policy_cache;
- struct tx_policy_cache_entry *entry;
-
- cw1200_tx_queues_lock(priv);
- spin_lock_bh(&cache->lock);
- locked = list_empty(&cache->free);
-
- for (idx = 0; idx < TX_POLICY_CACHE_SIZE; idx++) {
- entry = &cache->cache[idx];
- /* Policy usage count should be 0 at this time as all queues
- should be empty
- */
- if (WARN_ON(entry->policy.usage_count)) {
- entry->policy.usage_count = 0;
- list_move(&entry->link, &cache->free);
- }
- memset(&entry->policy, 0, sizeof(entry->policy));
- }
- if (locked)
- cw1200_tx_queues_unlock(priv);
-
- cw1200_tx_queues_unlock(priv);
- spin_unlock_bh(&cache->lock);
-}
-
-/* ******************************************************************** */
-/* External TX policy cache API */
-
-void tx_policy_init(struct cw1200_common *priv)
-{
- struct tx_policy_cache *cache = &priv->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 < TX_POLICY_CACHE_SIZE; ++i)
- list_add(&cache->cache[i].link, &cache->free);
-}
-
-static int tx_policy_get(struct cw1200_common *priv,
- struct ieee80211_tx_rate *rates,
- size_t count, bool *renew)
-{
- int idx;
- struct tx_policy_cache *cache = &priv->tx_policy_cache;
- struct tx_policy wanted;
-
- tx_policy_build(priv, &wanted, rates, count);
-
- spin_lock_bh(&cache->lock);
- if (WARN_ON_ONCE(list_empty(&cache->free))) {
- spin_unlock_bh(&cache->lock);
- return CW1200_INVALID_RATE_ID;
- }
- idx = tx_policy_find(cache, &wanted);
- if (idx >= 0) {
- pr_debug("[TX policy] Used TX policy: %d\n", idx);
- *renew = false;
- } else {
- struct tx_policy_cache_entry *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_cache_entry, link);
- entry->policy = wanted;
- idx = entry - cache->cache;
- pr_debug("[TX policy] New TX policy: %d\n", idx);
- tx_policy_dump(&entry->policy);
- }
- tx_policy_use(cache, &cache->cache[idx]);
- if (list_empty(&cache->free)) {
- /* Lock TX queues. */
- cw1200_tx_queues_lock(priv);
- }
- spin_unlock_bh(&cache->lock);
- return idx;
-}
-
-static void tx_policy_put(struct cw1200_common *priv, int idx)
-{
- int usage, locked;
- struct tx_policy_cache *cache = &priv->tx_policy_cache;
-
- spin_lock_bh(&cache->lock);
- locked = list_empty(&cache->free);
- usage = tx_policy_release(cache, &cache->cache[idx]);
- if (locked && !usage) {
- /* Unlock TX queues. */
- cw1200_tx_queues_unlock(priv);
- }
- spin_unlock_bh(&cache->lock);
-}
-
-static int tx_policy_upload(struct cw1200_common *priv)
-{
- struct tx_policy_cache *cache = &priv->tx_policy_cache;
- int i;
- struct wsm_set_tx_rate_retry_policy arg = {
- .num = 0,
- };
- spin_lock_bh(&cache->lock);
-
- /* Upload only modified entries. */
- for (i = 0; i < TX_POLICY_CACHE_SIZE; ++i) {
- struct tx_policy *src = &cache->cache[i].policy;
- if (src->retry_count && !src->uploaded) {
- struct wsm_tx_rate_retry_policy *dst =
- &arg.tbl[arg.num];
- dst->index = i;
- dst->short_retries = priv->short_frame_max_tx_count;
- dst->long_retries = priv->long_frame_max_tx_count;
-
- dst->flags = WSM_TX_RATE_POLICY_FLAG_TERMINATE_WHEN_FINISHED |
- WSM_TX_RATE_POLICY_FLAG_COUNT_INITIAL_TRANSMIT;
- memcpy(dst->rate_count_indices, src->tbl,
- sizeof(dst->rate_count_indices));
- src->uploaded = 1;
- ++arg.num;
- }
- }
- spin_unlock_bh(&cache->lock);
- cw1200_debug_tx_cache_miss(priv);
- pr_debug("[TX policy] Upload %d policies\n", arg.num);
- return wsm_set_tx_rate_retry_policy(priv, &arg);
-}
-
-void tx_policy_upload_work(struct work_struct *work)
-{
- struct cw1200_common *priv =
- container_of(work, struct cw1200_common, tx_policy_upload_work);
-
- pr_debug("[TX] TX policy upload.\n");
- tx_policy_upload(priv);
-
- wsm_unlock_tx(priv);
- cw1200_tx_queues_unlock(priv);
-}
-
-/* ******************************************************************** */
-/* cw1200 TX implementation */
-
-struct cw1200_txinfo {
- struct sk_buff *skb;
- unsigned queue;
- struct ieee80211_tx_info *tx_info;
- const struct ieee80211_rate *rate;
- struct ieee80211_hdr *hdr;
- size_t hdrlen;
- const u8 *da;
- struct cw1200_sta_priv *sta_priv;
- struct ieee80211_sta *sta;
- struct cw1200_txpriv txpriv;
-};
-
-u32 cw1200_rate_mask_to_wsm(struct cw1200_common *priv, u32 rates)
-{
- u32 ret = 0;
- int i;
- for (i = 0; i < 32; ++i) {
- if (rates & BIT(i))
- ret |= BIT(priv->rates[i].hw_value);
- }
- return ret;
-}
-
-static const struct ieee80211_rate *
-cw1200_get_tx_rate(const struct cw1200_common *priv,
- const struct ieee80211_tx_rate *rate)
-{
- if (rate->idx < 0)
- return NULL;
- if (rate->flags & IEEE80211_TX_RC_MCS)
- return &priv->mcs_rates[rate->idx];
- return &priv->hw->wiphy->bands[priv->channel->band]->
- bitrates[rate->idx];
-}
-
-static int
-cw1200_tx_h_calc_link_ids(struct cw1200_common *priv,
- struct cw1200_txinfo *t)
-{
- if (t->sta && t->sta_priv->link_id)
- t->txpriv.raw_link_id =
- t->txpriv.link_id =
- t->sta_priv->link_id;
- else if (priv->mode != NL80211_IFTYPE_AP)
- t->txpriv.raw_link_id =
- t->txpriv.link_id = 0;
- else if (is_multicast_ether_addr(t->da)) {
- if (priv->enable_beacon) {
- t->txpriv.raw_link_id = 0;
- t->txpriv.link_id = CW1200_LINK_ID_AFTER_DTIM;
- } else {
- t->txpriv.raw_link_id = 0;
- t->txpriv.link_id = 0;
- }
- } else {
- t->txpriv.link_id = cw1200_find_link_id(priv, t->da);
- if (!t->txpriv.link_id)
- t->txpriv.link_id = cw1200_alloc_link_id(priv, t->da);
- if (!t->txpriv.link_id) {
- wiphy_err(priv->hw->wiphy,
- "No more link IDs available.\n");
- return -ENOENT;
- }
- t->txpriv.raw_link_id = t->txpriv.link_id;
- }
- if (t->txpriv.raw_link_id)
- priv->link_id_db[t->txpriv.raw_link_id - 1].timestamp =
- jiffies;
- if (t->sta && (t->sta->uapsd_queues & BIT(t->queue)))
- t->txpriv.link_id = CW1200_LINK_ID_UAPSD;
- return 0;
-}
-
-static void
-cw1200_tx_h_pm(struct cw1200_common *priv,
- struct cw1200_txinfo *t)
-{
- if (ieee80211_is_auth(t->hdr->frame_control)) {
- u32 mask = ~BIT(t->txpriv.raw_link_id);
- spin_lock_bh(&priv->ps_state_lock);
- priv->sta_asleep_mask &= mask;
- priv->pspoll_mask &= mask;
- spin_unlock_bh(&priv->ps_state_lock);
- }
-}
-
-static void
-cw1200_tx_h_calc_tid(struct cw1200_common *priv,
- struct cw1200_txinfo *t)
-{
- if (ieee80211_is_data_qos(t->hdr->frame_control)) {
- u8 *qos = ieee80211_get_qos_ctl(t->hdr);
- t->txpriv.tid = qos[0] & IEEE80211_QOS_CTL_TID_MASK;
- } else if (ieee80211_is_data(t->hdr->frame_control)) {
- t->txpriv.tid = 0;
- }
-}
-
-static int
-cw1200_tx_h_crypt(struct cw1200_common *priv,
- struct cw1200_txinfo *t)
-{
- if (!t->tx_info->control.hw_key ||
- !ieee80211_has_protected(t->hdr->frame_control))
- return 0;
-
- t->hdrlen += t->tx_info->control.hw_key->iv_len;
- skb_put(t->skb, t->tx_info->control.hw_key->icv_len);
-
- if (t->tx_info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP)
- skb_put(t->skb, 8); /* MIC space */
-
- return 0;
-}
-
-static int
-cw1200_tx_h_align(struct cw1200_common *priv,
- struct cw1200_txinfo *t,
- u8 *flags)
-{
- size_t offset = (size_t)t->skb->data & 3;
-
- if (!offset)
- return 0;
-
- if (offset & 1) {
- wiphy_err(priv->hw->wiphy,
- "Bug: attempt to transmit a frame with wrong alignment: %zu\n",
- offset);
- return -EINVAL;
- }
-
- if (skb_headroom(t->skb) < offset) {
- wiphy_err(priv->hw->wiphy,
- "Bug: no space allocated for DMA alignment. headroom: %d\n",
- skb_headroom(t->skb));
- return -ENOMEM;
- }
- skb_push(t->skb, offset);
- t->hdrlen += offset;
- t->txpriv.offset += offset;
- *flags |= WSM_TX_2BYTES_SHIFT;
- cw1200_debug_tx_align(priv);
- return 0;
-}
-
-static int
-cw1200_tx_h_action(struct cw1200_common *priv,
- struct cw1200_txinfo *t)
-{
- struct ieee80211_mgmt *mgmt =
- (struct ieee80211_mgmt *)t->hdr;
- if (ieee80211_is_action(t->hdr->frame_control) &&
- mgmt->u.action.category == WLAN_CATEGORY_BACK)
- return 1;
- else
- return 0;
-}
-
-/* Add WSM header */
-static struct wsm_tx *
-cw1200_tx_h_wsm(struct cw1200_common *priv,
- struct cw1200_txinfo *t)
-{
- struct wsm_tx *wsm;
-
- if (skb_headroom(t->skb) < sizeof(struct wsm_tx)) {
- wiphy_err(priv->hw->wiphy,
- "Bug: no space allocated for WSM header. headroom: %d\n",
- skb_headroom(t->skb));
- return NULL;
- }
-
- wsm = (struct wsm_tx *)skb_push(t->skb, sizeof(struct wsm_tx));
- t->txpriv.offset += sizeof(struct wsm_tx);
- memset(wsm, 0, sizeof(*wsm));
- wsm->hdr.len = __cpu_to_le16(t->skb->len);
- wsm->hdr.id = __cpu_to_le16(0x0004);
- wsm->queue_id = wsm_queue_id_to_wsm(t->queue);
- return wsm;
-}
-
-/* BT Coex specific handling */
-static void
-cw1200_tx_h_bt(struct cw1200_common *priv,
- struct cw1200_txinfo *t,
- struct wsm_tx *wsm)
-{
- u8 priority = 0;
-
- if (!priv->bt_present)
- return;
-
- if (ieee80211_is_nullfunc(t->hdr->frame_control)) {
- priority = WSM_EPTA_PRIORITY_MGT;
- } else if (ieee80211_is_data(t->hdr->frame_control)) {
- /* Skip LLC SNAP header (+6) */
- u8 *payload = &t->skb->data[t->hdrlen];
- __be16 *ethertype = (__be16 *)&payload[6];
- if (be16_to_cpu(*ethertype) == ETH_P_PAE)
- priority = WSM_EPTA_PRIORITY_EAPOL;
- } else if (ieee80211_is_assoc_req(t->hdr->frame_control) ||
- ieee80211_is_reassoc_req(t->hdr->frame_control)) {
- struct ieee80211_mgmt *mgt_frame =
- (struct ieee80211_mgmt *)t->hdr;
-
- if (le16_to_cpu(mgt_frame->u.assoc_req.listen_interval) <
- priv->listen_interval) {
- pr_debug("Modified Listen Interval to %d from %d\n",
- priv->listen_interval,
- mgt_frame->u.assoc_req.listen_interval);
- /* Replace listen interval derieved from
- * the one read from SDD
- */
- mgt_frame->u.assoc_req.listen_interval = cpu_to_le16(priv->listen_interval);
- }
- }
-
- if (!priority) {
- if (ieee80211_is_action(t->hdr->frame_control))
- priority = WSM_EPTA_PRIORITY_ACTION;
- else if (ieee80211_is_mgmt(t->hdr->frame_control))
- priority = WSM_EPTA_PRIORITY_MGT;
- else if ((wsm->queue_id == WSM_QUEUE_VOICE))
- priority = WSM_EPTA_PRIORITY_VOICE;
- else if ((wsm->queue_id == WSM_QUEUE_VIDEO))
- priority = WSM_EPTA_PRIORITY_VIDEO;
- else
- priority = WSM_EPTA_PRIORITY_DATA;
- }
-
- pr_debug("[TX] EPTA priority %d.\n", priority);
-
- wsm->flags |= priority << 1;
-}
-
-static int
-cw1200_tx_h_rate_policy(struct cw1200_common *priv,
- struct cw1200_txinfo *t,
- struct wsm_tx *wsm)
-{
- bool tx_policy_renew = false;
-
- t->txpriv.rate_id = tx_policy_get(priv,
- t->tx_info->control.rates, IEEE80211_TX_MAX_RATES,
- &tx_policy_renew);
- if (t->txpriv.rate_id == CW1200_INVALID_RATE_ID)
- return -EFAULT;
-
- wsm->flags |= t->txpriv.rate_id << 4;
-
- t->rate = cw1200_get_tx_rate(priv,
- &t->tx_info->control.rates[0]),
- wsm->max_tx_rate = t->rate->hw_value;
- if (t->rate->flags & IEEE80211_TX_RC_MCS) {
- if (cw1200_ht_greenfield(&priv->ht_info))
- wsm->ht_tx_parameters |=
- __cpu_to_le32(WSM_HT_TX_GREENFIELD);
- else
- wsm->ht_tx_parameters |=
- __cpu_to_le32(WSM_HT_TX_MIXED);
- }
-
- if (tx_policy_renew) {
- pr_debug("[TX] TX policy renew.\n");
- /* It's not so optimal to stop TX queues every now and then.
- * Better to reimplement task scheduling with
- * a counter. TODO.
- */
- wsm_lock_tx_async(priv);
- cw1200_tx_queues_lock(priv);
- if (queue_work(priv->workqueue,
- &priv->tx_policy_upload_work) <= 0) {
- cw1200_tx_queues_unlock(priv);
- wsm_unlock_tx(priv);
- }
- }
- return 0;
-}
-
-static bool
-cw1200_tx_h_pm_state(struct cw1200_common *priv,
- struct cw1200_txinfo *t)
-{
- int was_buffered = 1;
-
- if (t->txpriv.link_id == CW1200_LINK_ID_AFTER_DTIM &&
- !priv->buffered_multicasts) {
- priv->buffered_multicasts = true;
- if (priv->sta_asleep_mask)
- queue_work(priv->workqueue,
- &priv->multicast_start_work);
- }
-
- if (t->txpriv.raw_link_id && t->txpriv.tid < CW1200_MAX_TID)
- was_buffered = priv->link_id_db[t->txpriv.raw_link_id - 1].buffered[t->txpriv.tid]++;
-
- return !was_buffered;
-}
-
-/* ******************************************************************** */
-
-void cw1200_tx(struct ieee80211_hw *dev,
- struct ieee80211_tx_control *control,
- struct sk_buff *skb)
-{
- struct cw1200_common *priv = dev->priv;
- struct cw1200_txinfo t = {
- .skb = skb,
- .queue = skb_get_queue_mapping(skb),
- .tx_info = IEEE80211_SKB_CB(skb),
- .hdr = (struct ieee80211_hdr *)skb->data,
- .txpriv.tid = CW1200_MAX_TID,
- .txpriv.rate_id = CW1200_INVALID_RATE_ID,
- };
- struct ieee80211_sta *sta;
- struct wsm_tx *wsm;
- bool tid_update = 0;
- u8 flags = 0;
- int ret;
-
- if (priv->bh_error)
- goto drop;
-
- t.hdrlen = ieee80211_hdrlen(t.hdr->frame_control);
- t.da = ieee80211_get_DA(t.hdr);
- if (control) {
- t.sta = control->sta;
- t.sta_priv = (struct cw1200_sta_priv *)&t.sta->drv_priv;
- }
-
- if (WARN_ON(t.queue >= 4))
- goto drop;
-
- ret = cw1200_tx_h_calc_link_ids(priv, &t);
- if (ret)
- goto drop;
-
- pr_debug("[TX] TX %d bytes (queue: %d, link_id: %d (%d)).\n",
- skb->len, t.queue, t.txpriv.link_id,
- t.txpriv.raw_link_id);
-
- cw1200_tx_h_pm(priv, &t);
- cw1200_tx_h_calc_tid(priv, &t);
- ret = cw1200_tx_h_crypt(priv, &t);
- if (ret)
- goto drop;
- ret = cw1200_tx_h_align(priv, &t, &flags);
- if (ret)
- goto drop;
- ret = cw1200_tx_h_action(priv, &t);
- if (ret)
- goto drop;
- wsm = cw1200_tx_h_wsm(priv, &t);
- if (!wsm) {
- ret = -ENOMEM;
- goto drop;
- }
- wsm->flags |= flags;
- cw1200_tx_h_bt(priv, &t, wsm);
- ret = cw1200_tx_h_rate_policy(priv, &t, wsm);
- if (ret)
- goto drop;
-
- rcu_read_lock();
- sta = rcu_dereference(t.sta);
-
- spin_lock_bh(&priv->ps_state_lock);
- {
- tid_update = cw1200_tx_h_pm_state(priv, &t);
- BUG_ON(cw1200_queue_put(&priv->tx_queue[t.queue],
- t.skb, &t.txpriv));
- }
- spin_unlock_bh(&priv->ps_state_lock);
-
- if (tid_update && sta)
- ieee80211_sta_set_buffered(sta, t.txpriv.tid, true);
-
- rcu_read_unlock();
-
- cw1200_bh_wakeup(priv);
-
- return;
-
-drop:
- cw1200_skb_dtor(priv, skb, &t.txpriv);
- return;
-}
-
-/* ******************************************************************** */
-
-static int cw1200_handle_action_rx(struct cw1200_common *priv,
- struct sk_buff *skb)
-{
- struct ieee80211_mgmt *mgmt = (void *)skb->data;
-
- /* Filter block ACK negotiation: fully controlled by firmware */
- if (mgmt->u.action.category == WLAN_CATEGORY_BACK)
- return 1;
-
- return 0;
-}
-
-static int cw1200_handle_pspoll(struct cw1200_common *priv,
- struct sk_buff *skb)
-{
- struct ieee80211_sta *sta;
- struct ieee80211_pspoll *pspoll = (struct ieee80211_pspoll *)skb->data;
- int link_id = 0;
- u32 pspoll_mask = 0;
- int drop = 1;
- int i;
-
- if (priv->join_status != CW1200_JOIN_STATUS_AP)
- goto done;
- if (memcmp(priv->vif->addr, pspoll->bssid, ETH_ALEN))
- goto done;
-
- rcu_read_lock();
- sta = ieee80211_find_sta(priv->vif, pspoll->ta);
- if (sta) {
- struct cw1200_sta_priv *sta_priv;
- sta_priv = (struct cw1200_sta_priv *)&sta->drv_priv;
- link_id = sta_priv->link_id;
- pspoll_mask = BIT(sta_priv->link_id);
- }
- rcu_read_unlock();
- if (!link_id)
- goto done;
-
- priv->pspoll_mask |= pspoll_mask;
- drop = 0;
-
- /* Do not report pspols if data for given link id is queued already. */
- for (i = 0; i < 4; ++i) {
- if (cw1200_queue_get_num_queued(&priv->tx_queue[i],
- pspoll_mask)) {
- cw1200_bh_wakeup(priv);
- drop = 1;
- break;
- }
- }
- pr_debug("[RX] PSPOLL: %s\n", drop ? "local" : "fwd");
-done:
- return drop;
-}
-
-/* ******************************************************************** */
-
-void cw1200_tx_confirm_cb(struct cw1200_common *priv,
- int link_id,
- struct wsm_tx_confirm *arg)
-{
- u8 queue_id = cw1200_queue_get_queue_id(arg->packet_id);
- struct cw1200_queue *queue = &priv->tx_queue[queue_id];
- struct sk_buff *skb;
- const struct cw1200_txpriv *txpriv;
-
- pr_debug("[TX] TX confirm: %d, %d.\n",
- arg->status, arg->ack_failures);
-
- if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) {
- /* STA is stopped. */
- return;
- }
-
- if (WARN_ON(queue_id >= 4))
- return;
-
- if (arg->status)
- pr_debug("TX failed: %d.\n", arg->status);
-
- if ((arg->status == WSM_REQUEUE) &&
- (arg->flags & WSM_TX_STATUS_REQUEUE)) {
- /* "Requeue" means "implicit suspend" */
- struct wsm_suspend_resume suspend = {
- .link_id = link_id,
- .stop = 1,
- .multicast = !link_id,
- };
- cw1200_suspend_resume(priv, &suspend);
- wiphy_warn(priv->hw->wiphy, "Requeue for link_id %d (try %d). STAs asleep: 0x%.8X\n",
- link_id,
- cw1200_queue_get_generation(arg->packet_id) + 1,
- priv->sta_asleep_mask);
- cw1200_queue_requeue(queue, arg->packet_id);
- spin_lock_bh(&priv->ps_state_lock);
- if (!link_id) {
- priv->buffered_multicasts = true;
- if (priv->sta_asleep_mask) {
- queue_work(priv->workqueue,
- &priv->multicast_start_work);
- }
- }
- spin_unlock_bh(&priv->ps_state_lock);
- } else if (!cw1200_queue_get_skb(queue, arg->packet_id,
- &skb, &txpriv)) {
- struct ieee80211_tx_info *tx = IEEE80211_SKB_CB(skb);
- int tx_count = arg->ack_failures;
- u8 ht_flags = 0;
- int i;
-
- if (cw1200_ht_greenfield(&priv->ht_info))
- ht_flags |= IEEE80211_TX_RC_GREEN_FIELD;
-
- spin_lock(&priv->bss_loss_lock);
- if (priv->bss_loss_state &&
- arg->packet_id == priv->bss_loss_confirm_id) {
- if (arg->status) {
- /* Recovery failed */
- __cw1200_cqm_bssloss_sm(priv, 0, 0, 1);
- } else {
- /* Recovery succeeded */
- __cw1200_cqm_bssloss_sm(priv, 0, 1, 0);
- }
- }
- spin_unlock(&priv->bss_loss_lock);
-
- if (!arg->status) {
- tx->flags |= IEEE80211_TX_STAT_ACK;
- ++tx_count;
- cw1200_debug_txed(priv);
- if (arg->flags & WSM_TX_STATUS_AGGREGATION) {
- /* Do not report aggregation to mac80211:
- * it confuses minstrel a lot.
- */
- /* tx->flags |= IEEE80211_TX_STAT_AMPDU; */
- cw1200_debug_txed_agg(priv);
- }
- } else {
- if (tx_count)
- ++tx_count;
- }
-
- for (i = 0; i < IEEE80211_TX_MAX_RATES; ++i) {
- if (tx->status.rates[i].count >= tx_count) {
- tx->status.rates[i].count = tx_count;
- break;
- }
- tx_count -= tx->status.rates[i].count;
- if (tx->status.rates[i].flags & IEEE80211_TX_RC_MCS)
- tx->status.rates[i].flags |= ht_flags;
- }
-
- for (++i; i < IEEE80211_TX_MAX_RATES; ++i) {
- tx->status.rates[i].count = 0;
- tx->status.rates[i].idx = -1;
- }
-
- /* Pull off any crypto trailers that we added on */
- if (tx->control.hw_key) {
- skb_trim(skb, skb->len - tx->control.hw_key->icv_len);
- if (tx->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP)
- skb_trim(skb, skb->len - 8); /* MIC space */
- }
- cw1200_queue_remove(queue, arg->packet_id);
- }
- /* XXX TODO: Only wake if there are pending transmits.. */
- cw1200_bh_wakeup(priv);
-}
-
-static void cw1200_notify_buffered_tx(struct cw1200_common *priv,
- struct sk_buff *skb, int link_id, int tid)
-{
- struct ieee80211_sta *sta;
- struct ieee80211_hdr *hdr;
- u8 *buffered;
- u8 still_buffered = 0;
-
- if (link_id && tid < CW1200_MAX_TID) {
- buffered = priv->link_id_db
- [link_id - 1].buffered;
-
- spin_lock_bh(&priv->ps_state_lock);
- if (!WARN_ON(!buffered[tid]))
- still_buffered = --buffered[tid];
- spin_unlock_bh(&priv->ps_state_lock);
-
- if (!still_buffered && tid < CW1200_MAX_TID) {
- hdr = (struct ieee80211_hdr *)skb->data;
- rcu_read_lock();
- sta = ieee80211_find_sta(priv->vif, hdr->addr1);
- if (sta)
- ieee80211_sta_set_buffered(sta, tid, false);
- rcu_read_unlock();
- }
- }
-}
-
-void cw1200_skb_dtor(struct cw1200_common *priv,
- struct sk_buff *skb,
- const struct cw1200_txpriv *txpriv)
-{
- skb_pull(skb, txpriv->offset);
- if (txpriv->rate_id != CW1200_INVALID_RATE_ID) {
- cw1200_notify_buffered_tx(priv, skb,
- txpriv->raw_link_id, txpriv->tid);
- tx_policy_put(priv, txpriv->rate_id);
- }
- ieee80211_tx_status(priv->hw, skb);
-}
-
-void cw1200_rx_cb(struct cw1200_common *priv,
- struct wsm_rx *arg,
- int link_id,
- struct sk_buff **skb_p)
-{
- struct sk_buff *skb = *skb_p;
- struct ieee80211_rx_status *hdr = IEEE80211_SKB_RXCB(skb);
- struct ieee80211_hdr *frame = (struct ieee80211_hdr *)skb->data;
- struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
- struct cw1200_link_entry *entry = NULL;
- unsigned long grace_period;
-
- bool early_data = false;
- bool p2p = priv->vif && priv->vif->p2p;
- size_t hdrlen;
- hdr->flag = 0;
-
- if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) {
- /* STA is stopped. */
- goto drop;
- }
-
- if (link_id && link_id <= CW1200_MAX_STA_IN_AP_MODE) {
- entry = &priv->link_id_db[link_id - 1];
- if (entry->status == CW1200_LINK_SOFT &&
- ieee80211_is_data(frame->frame_control))
- early_data = true;
- entry->timestamp = jiffies;
- } else if (p2p &&
- ieee80211_is_action(frame->frame_control) &&
- (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC)) {
- pr_debug("[RX] Going to MAP&RESET link ID\n");
- WARN_ON(work_pending(&priv->linkid_reset_work));
- memcpy(&priv->action_frame_sa[0],
- ieee80211_get_SA(frame), ETH_ALEN);
- priv->action_linkid = 0;
- schedule_work(&priv->linkid_reset_work);
- }
-
- if (link_id && p2p &&
- ieee80211_is_action(frame->frame_control) &&
- (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC)) {
- /* Link ID already exists for the ACTION frame.
- * Reset and Remap
- */
- WARN_ON(work_pending(&priv->linkid_reset_work));
- memcpy(&priv->action_frame_sa[0],
- ieee80211_get_SA(frame), ETH_ALEN);
- priv->action_linkid = link_id;
- schedule_work(&priv->linkid_reset_work);
- }
- if (arg->status) {
- if (arg->status == WSM_STATUS_MICFAILURE) {
- pr_debug("[RX] MIC failure.\n");
- hdr->flag |= RX_FLAG_MMIC_ERROR;
- } else if (arg->status == WSM_STATUS_NO_KEY_FOUND) {
- pr_debug("[RX] No key found.\n");
- goto drop;
- } else {
- pr_debug("[RX] Receive failure: %d.\n",
- arg->status);
- goto drop;
- }
- }
-
- if (skb->len < sizeof(struct ieee80211_pspoll)) {
- wiphy_warn(priv->hw->wiphy, "Mailformed SDU rx'ed. Size is lesser than IEEE header.\n");
- goto drop;
- }
-
- if (ieee80211_is_pspoll(frame->frame_control))
- if (cw1200_handle_pspoll(priv, skb))
- goto drop;
-
- hdr->band = ((arg->channel_number & 0xff00) ||
- (arg->channel_number > 14)) ?
- IEEE80211_BAND_5GHZ : IEEE80211_BAND_2GHZ;
- hdr->freq = ieee80211_channel_to_frequency(
- arg->channel_number,
- hdr->band);
-
- if (arg->rx_rate >= 14) {
- hdr->flag |= RX_FLAG_HT;
- hdr->rate_idx = arg->rx_rate - 14;
- } else if (arg->rx_rate >= 4) {
- hdr->rate_idx = arg->rx_rate - 2;
- } else {
- hdr->rate_idx = arg->rx_rate;
- }
-
- hdr->signal = (s8)arg->rcpi_rssi;
- hdr->antenna = 0;
-
- hdrlen = ieee80211_hdrlen(frame->frame_control);
-
- if (WSM_RX_STATUS_ENCRYPTION(arg->flags)) {
- size_t iv_len = 0, icv_len = 0;
-
- hdr->flag |= RX_FLAG_DECRYPTED | RX_FLAG_IV_STRIPPED;
-
- /* Oops... There is no fast way to ask mac80211 about
- * IV/ICV lengths. Even defineas are not exposed.
- */
- switch (WSM_RX_STATUS_ENCRYPTION(arg->flags)) {
- case WSM_RX_STATUS_WEP:
- iv_len = 4 /* WEP_IV_LEN */;
- icv_len = 4 /* WEP_ICV_LEN */;
- break;
- case WSM_RX_STATUS_TKIP:
- iv_len = 8 /* TKIP_IV_LEN */;
- icv_len = 4 /* TKIP_ICV_LEN */
- + 8 /*MICHAEL_MIC_LEN*/;
- hdr->flag |= RX_FLAG_MMIC_STRIPPED;
- break;
- case WSM_RX_STATUS_AES:
- iv_len = 8 /* CCMP_HDR_LEN */;
- icv_len = 8 /* CCMP_MIC_LEN */;
- break;
- case WSM_RX_STATUS_WAPI:
- iv_len = 18 /* WAPI_HDR_LEN */;
- icv_len = 16 /* WAPI_MIC_LEN */;
- break;
- default:
- pr_warn("Unknown encryption type %d\n",
- WSM_RX_STATUS_ENCRYPTION(arg->flags));
- goto drop;
- }
-
- /* Firmware strips ICV in case of MIC failure. */
- if (arg->status == WSM_STATUS_MICFAILURE)
- icv_len = 0;
-
- if (skb->len < hdrlen + iv_len + icv_len) {
- wiphy_warn(priv->hw->wiphy, "Malformed SDU rx'ed. Size is lesser than crypto headers.\n");
- goto drop;
- }
-
- /* Remove IV, ICV and MIC */
- skb_trim(skb, skb->len - icv_len);
- memmove(skb->data + iv_len, skb->data, hdrlen);
- skb_pull(skb, iv_len);
- }
-
- /* Remove TSF from the end of frame */
- if (arg->flags & WSM_RX_STATUS_TSF_INCLUDED) {
- memcpy(&hdr->mactime, skb->data + skb->len - 8, 8);
- hdr->mactime = le64_to_cpu(hdr->mactime);
- if (skb->len >= 8)
- skb_trim(skb, skb->len - 8);
- } else {
- hdr->mactime = 0;
- }
-
- cw1200_debug_rxed(priv);
- if (arg->flags & WSM_RX_STATUS_AGGREGATE)
- cw1200_debug_rxed_agg(priv);
-
- if (ieee80211_is_action(frame->frame_control) &&
- (arg->flags & WSM_RX_STATUS_ADDRESS1)) {
- if (cw1200_handle_action_rx(priv, skb))
- return;
- } else if (ieee80211_is_beacon(frame->frame_control) &&
- !arg->status && priv->vif &&
- ether_addr_equal(ieee80211_get_SA(frame), priv->vif->bss_conf.bssid)) {
- const u8 *tim_ie;
- u8 *ies = ((struct ieee80211_mgmt *)
- (skb->data))->u.beacon.variable;
- size_t ies_len = skb->len - (ies - (u8 *)(skb->data));
-
- tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies, ies_len);
- if (tim_ie) {
- struct ieee80211_tim_ie *tim =
- (struct ieee80211_tim_ie *)&tim_ie[2];
-
- if (priv->join_dtim_period != tim->dtim_period) {
- priv->join_dtim_period = tim->dtim_period;
- queue_work(priv->workqueue,
- &priv->set_beacon_wakeup_period_work);
- }
- }
-
- /* Disable beacon filter once we're associated... */
- if (priv->disable_beacon_filter &&
- (priv->vif->bss_conf.assoc ||
- priv->vif->bss_conf.ibss_joined)) {
- priv->disable_beacon_filter = false;
- queue_work(priv->workqueue,
- &priv->update_filtering_work);
- }
- }
-
- /* Stay awake after frame is received to give
- * userspace chance to react and acquire appropriate
- * wakelock.
- */
- if (ieee80211_is_auth(frame->frame_control))
- grace_period = 5 * HZ;
- else if (ieee80211_is_deauth(frame->frame_control))
- grace_period = 5 * HZ;
- else
- grace_period = 1 * HZ;
- cw1200_pm_stay_awake(&priv->pm_state, grace_period);
-
- if (early_data) {
- spin_lock_bh(&priv->ps_state_lock);
- /* Double-check status with lock held */
- if (entry->status == CW1200_LINK_SOFT)
- skb_queue_tail(&entry->rx_queue, skb);
- else
- ieee80211_rx_irqsafe(priv->hw, skb);
- spin_unlock_bh(&priv->ps_state_lock);
- } else {
- ieee80211_rx_irqsafe(priv->hw, skb);
- }
- *skb_p = NULL;
-
- return;
-
-drop:
- /* TODO: update failure counters */
- return;
-}
-
-/* ******************************************************************** */
-/* Security */
-
-int cw1200_alloc_key(struct cw1200_common *priv)
-{
- int idx;
-
- idx = ffs(~priv->key_map) - 1;
- if (idx < 0 || idx > WSM_KEY_MAX_INDEX)
- return -1;
-
- priv->key_map |= BIT(idx);
- priv->keys[idx].index = idx;
- return idx;
-}
-
-void cw1200_free_key(struct cw1200_common *priv, int idx)
-{
- BUG_ON(!(priv->key_map & BIT(idx)));
- memset(&priv->keys[idx], 0, sizeof(priv->keys[idx]));
- priv->key_map &= ~BIT(idx);
-}
-
-void cw1200_free_keys(struct cw1200_common *priv)
-{
- memset(&priv->keys, 0, sizeof(priv->keys));
- priv->key_map = 0;
-}
-
-int cw1200_upload_keys(struct cw1200_common *priv)
-{
- int idx, ret = 0;
- for (idx = 0; idx <= WSM_KEY_MAX_INDEX; ++idx)
- if (priv->key_map & BIT(idx)) {
- ret = wsm_add_key(priv, &priv->keys[idx]);
- if (ret < 0)
- break;
- }
- return ret;
-}
-
-/* Workaround for WFD test case 6.1.10 */
-void cw1200_link_id_reset(struct work_struct *work)
-{
- struct cw1200_common *priv =
- container_of(work, struct cw1200_common, linkid_reset_work);
- int temp_linkid;
-
- if (!priv->action_linkid) {
- /* In GO mode we can receive ACTION frames without a linkID */
- temp_linkid = cw1200_alloc_link_id(priv,
- &priv->action_frame_sa[0]);
- WARN_ON(!temp_linkid);
- if (temp_linkid) {
- /* Make sure we execute the WQ */
- flush_workqueue(priv->workqueue);
- /* Release the link ID */
- spin_lock_bh(&priv->ps_state_lock);
- priv->link_id_db[temp_linkid - 1].prev_status =
- priv->link_id_db[temp_linkid - 1].status;
- priv->link_id_db[temp_linkid - 1].status =
- CW1200_LINK_RESET;
- spin_unlock_bh(&priv->ps_state_lock);
- wsm_lock_tx_async(priv);
- if (queue_work(priv->workqueue,
- &priv->link_id_work) <= 0)
- wsm_unlock_tx(priv);
- }
- } else {
- spin_lock_bh(&priv->ps_state_lock);
- priv->link_id_db[priv->action_linkid - 1].prev_status =
- priv->link_id_db[priv->action_linkid - 1].status;
- priv->link_id_db[priv->action_linkid - 1].status =
- CW1200_LINK_RESET_REMAP;
- spin_unlock_bh(&priv->ps_state_lock);
- wsm_lock_tx_async(priv);
- if (queue_work(priv->workqueue, &priv->link_id_work) <= 0)
- wsm_unlock_tx(priv);
- flush_workqueue(priv->workqueue);
- }
-}
-
-int cw1200_find_link_id(struct cw1200_common *priv, const u8 *mac)
-{
- int i, ret = 0;
- spin_lock_bh(&priv->ps_state_lock);
- for (i = 0; i < CW1200_MAX_STA_IN_AP_MODE; ++i) {
- if (!memcmp(mac, priv->link_id_db[i].mac, ETH_ALEN) &&
- priv->link_id_db[i].status) {
- priv->link_id_db[i].timestamp = jiffies;
- ret = i + 1;
- break;
- }
- }
- spin_unlock_bh(&priv->ps_state_lock);
- return ret;
-}
-
-int cw1200_alloc_link_id(struct cw1200_common *priv, const u8 *mac)
-{
- int i, ret = 0;
- unsigned long max_inactivity = 0;
- unsigned long now = jiffies;
-
- spin_lock_bh(&priv->ps_state_lock);
- for (i = 0; i < CW1200_MAX_STA_IN_AP_MODE; ++i) {
- if (!priv->link_id_db[i].status) {
- ret = i + 1;
- break;
- } else if (priv->link_id_db[i].status != CW1200_LINK_HARD &&
- !priv->tx_queue_stats.link_map_cache[i + 1]) {
- unsigned long inactivity =
- now - priv->link_id_db[i].timestamp;
- if (inactivity < max_inactivity)
- continue;
- max_inactivity = inactivity;
- ret = i + 1;
- }
- }
- if (ret) {
- struct cw1200_link_entry *entry = &priv->link_id_db[ret - 1];
- pr_debug("[AP] STA added, link_id: %d\n", ret);
- entry->status = CW1200_LINK_RESERVE;
- memcpy(&entry->mac, mac, ETH_ALEN);
- memset(&entry->buffered, 0, CW1200_MAX_TID);
- skb_queue_head_init(&entry->rx_queue);
- wsm_lock_tx_async(priv);
- if (queue_work(priv->workqueue, &priv->link_id_work) <= 0)
- wsm_unlock_tx(priv);
- } else {
- wiphy_info(priv->hw->wiphy,
- "[AP] Early: no more link IDs available.\n");
- }
-
- spin_unlock_bh(&priv->ps_state_lock);
- return ret;
-}
-
-void cw1200_link_id_work(struct work_struct *work)
-{
- struct cw1200_common *priv =
- container_of(work, struct cw1200_common, link_id_work);
- wsm_flush_tx(priv);
- cw1200_link_id_gc_work(&priv->link_id_gc_work.work);
- wsm_unlock_tx(priv);
-}
-
-void cw1200_link_id_gc_work(struct work_struct *work)
-{
- struct cw1200_common *priv =
- container_of(work, struct cw1200_common, link_id_gc_work.work);
- struct wsm_reset reset = {
- .reset_statistics = false,
- };
- struct wsm_map_link map_link = {
- .link_id = 0,
- };
- unsigned long now = jiffies;
- unsigned long next_gc = -1;
- long ttl;
- bool need_reset;
- u32 mask;
- int i;
-
- if (priv->join_status != CW1200_JOIN_STATUS_AP)
- return;
-
- wsm_lock_tx(priv);
- spin_lock_bh(&priv->ps_state_lock);
- for (i = 0; i < CW1200_MAX_STA_IN_AP_MODE; ++i) {
- need_reset = false;
- mask = BIT(i + 1);
- if (priv->link_id_db[i].status == CW1200_LINK_RESERVE ||
- (priv->link_id_db[i].status == CW1200_LINK_HARD &&
- !(priv->link_id_map & mask))) {
- if (priv->link_id_map & mask) {
- priv->sta_asleep_mask &= ~mask;
- priv->pspoll_mask &= ~mask;
- need_reset = true;
- }
- priv->link_id_map |= mask;
- if (priv->link_id_db[i].status != CW1200_LINK_HARD)
- priv->link_id_db[i].status = CW1200_LINK_SOFT;
- memcpy(map_link.mac_addr, priv->link_id_db[i].mac,
- ETH_ALEN);
- spin_unlock_bh(&priv->ps_state_lock);
- if (need_reset) {
- reset.link_id = i + 1;
- wsm_reset(priv, &reset);
- }
- map_link.link_id = i + 1;
- wsm_map_link(priv, &map_link);
- next_gc = min(next_gc, CW1200_LINK_ID_GC_TIMEOUT);
- spin_lock_bh(&priv->ps_state_lock);
- } else if (priv->link_id_db[i].status == CW1200_LINK_SOFT) {
- ttl = priv->link_id_db[i].timestamp - now +
- CW1200_LINK_ID_GC_TIMEOUT;
- if (ttl <= 0) {
- need_reset = true;
- priv->link_id_db[i].status = CW1200_LINK_OFF;
- priv->link_id_map &= ~mask;
- priv->sta_asleep_mask &= ~mask;
- priv->pspoll_mask &= ~mask;
- eth_zero_addr(map_link.mac_addr);
- spin_unlock_bh(&priv->ps_state_lock);
- reset.link_id = i + 1;
- wsm_reset(priv, &reset);
- spin_lock_bh(&priv->ps_state_lock);
- } else {
- next_gc = min_t(unsigned long, next_gc, ttl);
- }
- } else if (priv->link_id_db[i].status == CW1200_LINK_RESET ||
- priv->link_id_db[i].status ==
- CW1200_LINK_RESET_REMAP) {
- int status = priv->link_id_db[i].status;
- priv->link_id_db[i].status =
- priv->link_id_db[i].prev_status;
- priv->link_id_db[i].timestamp = now;
- reset.link_id = i + 1;
- spin_unlock_bh(&priv->ps_state_lock);
- wsm_reset(priv, &reset);
- if (status == CW1200_LINK_RESET_REMAP) {
- memcpy(map_link.mac_addr,
- priv->link_id_db[i].mac,
- ETH_ALEN);
- map_link.link_id = i + 1;
- wsm_map_link(priv, &map_link);
- next_gc = min(next_gc,
- CW1200_LINK_ID_GC_TIMEOUT);
- }
- spin_lock_bh(&priv->ps_state_lock);
- }
- if (need_reset) {
- skb_queue_purge(&priv->link_id_db[i].rx_queue);
- pr_debug("[AP] STA removed, link_id: %d\n",
- reset.link_id);
- }
- }
- spin_unlock_bh(&priv->ps_state_lock);
- if (next_gc != -1)
- queue_delayed_work(priv->workqueue,
- &priv->link_id_gc_work, next_gc);
- wsm_unlock_tx(priv);
-}