// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Datapath implementation for ST-Ericsson CW1200 mac80211 drivers
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*
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* Copyright (c) 2010, ST-Ericsson
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* Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
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*/
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#include <net/mac80211.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include "cw1200.h"
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#include "wsm.h"
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#include "bh.h"
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#include "sta.h"
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#include "debug.h"
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#define CW1200_INVALID_RATE_ID (0xFF)
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static int cw1200_handle_action_rx(struct cw1200_common *priv,
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struct sk_buff *skb);
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static const struct ieee80211_rate *
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cw1200_get_tx_rate(const struct cw1200_common *priv,
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const struct ieee80211_tx_rate *rate);
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/* ******************************************************************** */
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/* TX queue lock / unlock */
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static inline void cw1200_tx_queues_lock(struct cw1200_common *priv)
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{
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int i;
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for (i = 0; i < 4; ++i)
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cw1200_queue_lock(&priv->tx_queue[i]);
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}
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static inline void cw1200_tx_queues_unlock(struct cw1200_common *priv)
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{
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int i;
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for (i = 0; i < 4; ++i)
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cw1200_queue_unlock(&priv->tx_queue[i]);
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}
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/* ******************************************************************** */
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/* TX policy cache implementation */
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static void tx_policy_dump(struct tx_policy *policy)
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{
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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",
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policy->raw[0] & 0x0F, policy->raw[0] >> 4,
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policy->raw[1] & 0x0F, policy->raw[1] >> 4,
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policy->raw[2] & 0x0F, policy->raw[2] >> 4,
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policy->raw[3] & 0x0F, policy->raw[3] >> 4,
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policy->raw[4] & 0x0F, policy->raw[4] >> 4,
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policy->raw[5] & 0x0F, policy->raw[5] >> 4,
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policy->raw[6] & 0x0F, policy->raw[6] >> 4,
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policy->raw[7] & 0x0F, policy->raw[7] >> 4,
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policy->raw[8] & 0x0F, policy->raw[8] >> 4,
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policy->raw[9] & 0x0F, policy->raw[9] >> 4,
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policy->raw[10] & 0x0F, policy->raw[10] >> 4,
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policy->raw[11] & 0x0F, policy->raw[11] >> 4,
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policy->defined);
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}
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static void tx_policy_build(const struct cw1200_common *priv,
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/* [out] */ struct tx_policy *policy,
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struct ieee80211_tx_rate *rates, size_t count)
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{
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int i, j;
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unsigned limit = priv->short_frame_max_tx_count;
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unsigned total = 0;
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BUG_ON(rates[0].idx < 0);
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memset(policy, 0, sizeof(*policy));
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/* Sort rates in descending order. */
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for (i = 1; i < count; ++i) {
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if (rates[i].idx < 0) {
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count = i;
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break;
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}
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if (rates[i].idx > rates[i - 1].idx) {
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struct ieee80211_tx_rate tmp = rates[i - 1];
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rates[i - 1] = rates[i];
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rates[i] = tmp;
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}
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}
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/* Eliminate duplicates. */
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total = rates[0].count;
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for (i = 0, j = 1; j < count; ++j) {
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if (rates[j].idx == rates[i].idx) {
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rates[i].count += rates[j].count;
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} else if (rates[j].idx > rates[i].idx) {
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break;
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} else {
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++i;
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if (i != j)
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rates[i] = rates[j];
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}
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total += rates[j].count;
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}
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count = i + 1;
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/* Re-fill policy trying to keep every requested rate and with
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* respect to the global max tx retransmission count.
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*/
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if (limit < count)
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limit = count;
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if (total > limit) {
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for (i = 0; i < count; ++i) {
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int left = count - i - 1;
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if (rates[i].count > limit - left)
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rates[i].count = limit - left;
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limit -= rates[i].count;
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}
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}
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/* HACK!!! Device has problems (at least) switching from
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* 54Mbps CTS to 1Mbps. This switch takes enormous amount
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* of time (100-200 ms), leading to valuable throughput drop.
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* As a workaround, additional g-rates are injected to the
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* policy.
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*/
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if (count == 2 && !(rates[0].flags & IEEE80211_TX_RC_MCS) &&
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rates[0].idx > 4 && rates[0].count > 2 &&
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rates[1].idx < 2) {
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int mid_rate = (rates[0].idx + 4) >> 1;
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/* Decrease number of retries for the initial rate */
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rates[0].count -= 2;
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if (mid_rate != 4) {
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/* Keep fallback rate at 1Mbps. */
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rates[3] = rates[1];
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/* Inject 1 transmission on lowest g-rate */
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rates[2].idx = 4;
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rates[2].count = 1;
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rates[2].flags = rates[1].flags;
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/* Inject 1 transmission on mid-rate */
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rates[1].idx = mid_rate;
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rates[1].count = 1;
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/* Fallback to 1 Mbps is a really bad thing,
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* so let's try to increase probability of
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* successful transmission on the lowest g rate
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* even more
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*/
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if (rates[0].count >= 3) {
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--rates[0].count;
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++rates[2].count;
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}
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/* Adjust amount of rates defined */
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count += 2;
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} else {
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/* Keep fallback rate at 1Mbps. */
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rates[2] = rates[1];
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/* Inject 2 transmissions on lowest g-rate */
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rates[1].idx = 4;
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rates[1].count = 2;
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/* Adjust amount of rates defined */
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count += 1;
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}
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}
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policy->defined = cw1200_get_tx_rate(priv, &rates[0])->hw_value + 1;
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for (i = 0; i < count; ++i) {
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register unsigned rateid, off, shift, retries;
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rateid = cw1200_get_tx_rate(priv, &rates[i])->hw_value;
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off = rateid >> 3; /* eq. rateid / 8 */
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shift = (rateid & 0x07) << 2; /* eq. (rateid % 8) * 4 */
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retries = rates[i].count;
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if (retries > 0x0F) {
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rates[i].count = 0x0f;
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retries = 0x0F;
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}
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policy->tbl[off] |= __cpu_to_le32(retries << shift);
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policy->retry_count += retries;
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}
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pr_debug("[TX policy] Policy (%zu): %d:%d, %d:%d, %d:%d, %d:%d\n",
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count,
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rates[0].idx, rates[0].count,
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rates[1].idx, rates[1].count,
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rates[2].idx, rates[2].count,
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rates[3].idx, rates[3].count);
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}
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static inline bool tx_policy_is_equal(const struct tx_policy *wanted,
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const struct tx_policy *cached)
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{
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size_t count = wanted->defined >> 1;
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if (wanted->defined > cached->defined)
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return false;
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if (count) {
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if (memcmp(wanted->raw, cached->raw, count))
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return false;
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}
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if (wanted->defined & 1) {
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if ((wanted->raw[count] & 0x0F) != (cached->raw[count] & 0x0F))
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return false;
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}
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return true;
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}
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static int tx_policy_find(struct tx_policy_cache *cache,
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const struct tx_policy *wanted)
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{
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/* O(n) complexity. Not so good, but there's only 8 entries in
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* the cache.
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* Also lru helps to reduce search time.
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*/
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struct tx_policy_cache_entry *it;
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/* First search for policy in "used" list */
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list_for_each_entry(it, &cache->used, link) {
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if (tx_policy_is_equal(wanted, &it->policy))
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return it - cache->cache;
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}
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/* Then - in "free list" */
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list_for_each_entry(it, &cache->free, link) {
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if (tx_policy_is_equal(wanted, &it->policy))
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return it - cache->cache;
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}
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return -1;
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}
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static inline void tx_policy_use(struct tx_policy_cache *cache,
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struct tx_policy_cache_entry *entry)
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{
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++entry->policy.usage_count;
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list_move(&entry->link, &cache->used);
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}
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static inline int tx_policy_release(struct tx_policy_cache *cache,
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struct tx_policy_cache_entry *entry)
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{
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int ret = --entry->policy.usage_count;
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if (!ret)
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list_move(&entry->link, &cache->free);
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return ret;
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}
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void tx_policy_clean(struct cw1200_common *priv)
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{
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int idx, locked;
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struct tx_policy_cache *cache = &priv->tx_policy_cache;
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struct tx_policy_cache_entry *entry;
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cw1200_tx_queues_lock(priv);
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spin_lock_bh(&cache->lock);
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locked = list_empty(&cache->free);
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for (idx = 0; idx < TX_POLICY_CACHE_SIZE; idx++) {
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entry = &cache->cache[idx];
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/* Policy usage count should be 0 at this time as all queues
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should be empty
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*/
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if (WARN_ON(entry->policy.usage_count)) {
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entry->policy.usage_count = 0;
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list_move(&entry->link, &cache->free);
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}
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memset(&entry->policy, 0, sizeof(entry->policy));
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}
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if (locked)
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cw1200_tx_queues_unlock(priv);
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cw1200_tx_queues_unlock(priv);
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spin_unlock_bh(&cache->lock);
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}
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/* ******************************************************************** */
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/* External TX policy cache API */
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void tx_policy_init(struct cw1200_common *priv)
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{
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struct tx_policy_cache *cache = &priv->tx_policy_cache;
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int i;
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memset(cache, 0, sizeof(*cache));
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spin_lock_init(&cache->lock);
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INIT_LIST_HEAD(&cache->used);
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INIT_LIST_HEAD(&cache->free);
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for (i = 0; i < TX_POLICY_CACHE_SIZE; ++i)
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list_add(&cache->cache[i].link, &cache->free);
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}
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static int tx_policy_get(struct cw1200_common *priv,
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struct ieee80211_tx_rate *rates,
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size_t count, bool *renew)
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{
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int idx;
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struct tx_policy_cache *cache = &priv->tx_policy_cache;
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struct tx_policy wanted;
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tx_policy_build(priv, &wanted, rates, count);
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spin_lock_bh(&cache->lock);
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if (WARN_ON_ONCE(list_empty(&cache->free))) {
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spin_unlock_bh(&cache->lock);
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return CW1200_INVALID_RATE_ID;
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}
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idx = tx_policy_find(cache, &wanted);
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if (idx >= 0) {
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pr_debug("[TX policy] Used TX policy: %d\n", idx);
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*renew = false;
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} else {
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struct tx_policy_cache_entry *entry;
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*renew = true;
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/* If policy is not found create a new one
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* using the oldest entry in "free" list
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*/
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entry = list_entry(cache->free.prev,
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struct tx_policy_cache_entry, link);
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entry->policy = wanted;
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idx = entry - cache->cache;
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pr_debug("[TX policy] New TX policy: %d\n", idx);
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tx_policy_dump(&entry->policy);
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}
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tx_policy_use(cache, &cache->cache[idx]);
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if (list_empty(&cache->free)) {
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/* Lock TX queues. */
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cw1200_tx_queues_lock(priv);
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}
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spin_unlock_bh(&cache->lock);
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return idx;
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}
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static void tx_policy_put(struct cw1200_common *priv, int idx)
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{
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int usage, locked;
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struct tx_policy_cache *cache = &priv->tx_policy_cache;
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spin_lock_bh(&cache->lock);
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locked = list_empty(&cache->free);
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usage = tx_policy_release(cache, &cache->cache[idx]);
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if (locked && !usage) {
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/* Unlock TX queues. */
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cw1200_tx_queues_unlock(priv);
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}
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spin_unlock_bh(&cache->lock);
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}
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static int tx_policy_upload(struct cw1200_common *priv)
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{
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struct tx_policy_cache *cache = &priv->tx_policy_cache;
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int i;
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struct wsm_set_tx_rate_retry_policy arg = {
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.num = 0,
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};
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spin_lock_bh(&cache->lock);
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/* Upload only modified entries. */
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for (i = 0; i < TX_POLICY_CACHE_SIZE; ++i) {
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struct tx_policy *src = &cache->cache[i].policy;
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if (src->retry_count && !src->uploaded) {
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struct wsm_tx_rate_retry_policy *dst =
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&arg.tbl[arg.num];
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dst->index = i;
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dst->short_retries = priv->short_frame_max_tx_count;
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dst->long_retries = priv->long_frame_max_tx_count;
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dst->flags = WSM_TX_RATE_POLICY_FLAG_TERMINATE_WHEN_FINISHED |
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WSM_TX_RATE_POLICY_FLAG_COUNT_INITIAL_TRANSMIT;
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memcpy(dst->rate_count_indices, src->tbl,
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sizeof(dst->rate_count_indices));
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src->uploaded = 1;
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++arg.num;
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}
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}
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spin_unlock_bh(&cache->lock);
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cw1200_debug_tx_cache_miss(priv);
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pr_debug("[TX policy] Upload %d policies\n", arg.num);
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return wsm_set_tx_rate_retry_policy(priv, &arg);
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}
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void tx_policy_upload_work(struct work_struct *work)
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{
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struct cw1200_common *priv =
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container_of(work, struct cw1200_common, tx_policy_upload_work);
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pr_debug("[TX] TX policy upload.\n");
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tx_policy_upload(priv);
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wsm_unlock_tx(priv);
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cw1200_tx_queues_unlock(priv);
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}
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/* ******************************************************************** */
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/* cw1200 TX implementation */
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struct cw1200_txinfo {
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struct sk_buff *skb;
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unsigned queue;
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struct ieee80211_tx_info *tx_info;
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const struct ieee80211_rate *rate;
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struct ieee80211_hdr *hdr;
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size_t hdrlen;
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const u8 *da;
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struct cw1200_sta_priv *sta_priv;
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struct ieee80211_sta *sta;
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struct cw1200_txpriv txpriv;
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};
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u32 cw1200_rate_mask_to_wsm(struct cw1200_common *priv, u32 rates)
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{
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u32 ret = 0;
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int i;
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for (i = 0; i < 32; ++i) {
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if (rates & BIT(i))
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ret |= BIT(priv->rates[i].hw_value);
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}
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return ret;
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}
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static const struct ieee80211_rate *
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cw1200_get_tx_rate(const struct cw1200_common *priv,
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const struct ieee80211_tx_rate *rate)
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{
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if (rate->idx < 0)
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return NULL;
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if (rate->flags & IEEE80211_TX_RC_MCS)
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return &priv->mcs_rates[rate->idx];
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return &priv->hw->wiphy->bands[priv->channel->band]->
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bitrates[rate->idx];
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}
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static int
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cw1200_tx_h_calc_link_ids(struct cw1200_common *priv,
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struct cw1200_txinfo *t)
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{
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if (t->sta && t->sta_priv->link_id)
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t->txpriv.raw_link_id =
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t->txpriv.link_id =
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t->sta_priv->link_id;
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else if (priv->mode != NL80211_IFTYPE_AP)
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t->txpriv.raw_link_id =
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t->txpriv.link_id = 0;
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else if (is_multicast_ether_addr(t->da)) {
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if (priv->enable_beacon) {
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t->txpriv.raw_link_id = 0;
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t->txpriv.link_id = CW1200_LINK_ID_AFTER_DTIM;
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} else {
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t->txpriv.raw_link_id = 0;
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t->txpriv.link_id = 0;
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}
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} else {
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t->txpriv.link_id = cw1200_find_link_id(priv, t->da);
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if (!t->txpriv.link_id)
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t->txpriv.link_id = cw1200_alloc_link_id(priv, t->da);
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if (!t->txpriv.link_id) {
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wiphy_err(priv->hw->wiphy,
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"No more link IDs available.\n");
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return -ENOENT;
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}
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t->txpriv.raw_link_id = t->txpriv.link_id;
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}
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if (t->txpriv.raw_link_id)
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priv->link_id_db[t->txpriv.raw_link_id - 1].timestamp =
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jiffies;
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if (t->sta && (t->sta->uapsd_queues & BIT(t->queue)))
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t->txpriv.link_id = CW1200_LINK_ID_UAPSD;
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return 0;
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}
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static void
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cw1200_tx_h_pm(struct cw1200_common *priv,
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struct cw1200_txinfo *t)
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{
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if (ieee80211_is_auth(t->hdr->frame_control)) {
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u32 mask = ~BIT(t->txpriv.raw_link_id);
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spin_lock_bh(&priv->ps_state_lock);
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priv->sta_asleep_mask &= mask;
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priv->pspoll_mask &= mask;
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spin_unlock_bh(&priv->ps_state_lock);
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}
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}
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static void
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cw1200_tx_h_calc_tid(struct cw1200_common *priv,
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struct cw1200_txinfo *t)
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{
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if (ieee80211_is_data_qos(t->hdr->frame_control)) {
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u8 *qos = ieee80211_get_qos_ctl(t->hdr);
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t->txpriv.tid = qos[0] & IEEE80211_QOS_CTL_TID_MASK;
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} else if (ieee80211_is_data(t->hdr->frame_control)) {
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t->txpriv.tid = 0;
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}
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}
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static int
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cw1200_tx_h_crypt(struct cw1200_common *priv,
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struct cw1200_txinfo *t)
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{
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if (!t->tx_info->control.hw_key ||
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!ieee80211_has_protected(t->hdr->frame_control))
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return 0;
|
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t->hdrlen += t->tx_info->control.hw_key->iv_len;
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skb_put(t->skb, t->tx_info->control.hw_key->icv_len);
|
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if (t->tx_info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP)
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skb_put(t->skb, 8); /* MIC space */
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return 0;
|
}
|
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static int
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cw1200_tx_h_align(struct cw1200_common *priv,
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struct cw1200_txinfo *t,
|
u8 *flags)
|
{
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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
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cw1200_tx_h_action(struct cw1200_common *priv,
|
struct cw1200_txinfo *t)
|
{
|
struct ieee80211_mgmt *mgmt =
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(struct ieee80211_mgmt *)t->hdr;
|
if (ieee80211_is_action(t->hdr->frame_control) &&
|
mgmt->u.action.category == WLAN_CATEGORY_BACK)
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return 1;
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else
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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 = 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 = false;
|
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, "Malformed 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)) ?
|
NL80211_BAND_5GHZ : NL80211_BAND_2GHZ;
|
hdr->freq = ieee80211_channel_to_frequency(
|
arg->channel_number,
|
hdr->band);
|
|
if (arg->rx_rate >= 14) {
|
hdr->encoding = RX_ENC_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);
|
}
|
