+++ /dev/null
-Free up 2 bytes in skb->cb to be used for multi-rate retry later.
-Move iv_len and icv_len initialization into key alloc.
-
-Signed-off-by: Felix Fietkau <nbd@openwrt.org>
-
---- a/include/net/mac80211.h
-+++ b/include/net/mac80211.h
-@@ -337,8 +337,6 @@
- unsigned long jiffies;
- s8 rts_cts_rate_idx, alt_retry_rate_idx;
- u8 retry_limit;
-- u8 icv_len;
-- u8 iv_len;
- } control;
- struct {
- u64 ampdu_ack_map;
-@@ -635,6 +633,8 @@
- */
- struct ieee80211_key_conf {
- enum ieee80211_key_alg alg;
-+ u8 icv_len;
-+ u8 iv_len;
- u8 hw_key_idx;
- u8 flags;
- s8 keyidx;
---- a/drivers/net/wireless/b43/xmit.c
-+++ b/drivers/net/wireless/b43/xmit.c
-@@ -252,7 +252,7 @@
- }
-
- /* Hardware appends ICV. */
-- plcp_fragment_len += info->control.icv_len;
-+ plcp_fragment_len += info->control.hw_key->icv_len;
-
- key_idx = b43_kidx_to_fw(dev, key_idx);
- mac_ctl |= (key_idx << B43_TXH_MAC_KEYIDX_SHIFT) &
-@@ -260,7 +260,7 @@
- mac_ctl |= (key->algorithm << B43_TXH_MAC_KEYALG_SHIFT) &
- B43_TXH_MAC_KEYALG;
- wlhdr_len = ieee80211_hdrlen(fctl);
-- iv_len = min((size_t) info->control.iv_len,
-+ iv_len = min((size_t) info->control.hw_key->iv_len,
- ARRAY_SIZE(txhdr->iv));
- memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len);
- }
---- a/drivers/net/wireless/b43legacy/xmit.c
-+++ b/drivers/net/wireless/b43legacy/xmit.c
-@@ -243,7 +243,7 @@
-
- if (key->enabled) {
- /* Hardware appends ICV. */
-- plcp_fragment_len += info->control.icv_len;
-+ plcp_fragment_len += info->control.hw_key->icv_len;
-
- key_idx = b43legacy_kidx_to_fw(dev, key_idx);
- mac_ctl |= (key_idx << B43legacy_TX4_MAC_KEYIDX_SHIFT) &
-@@ -252,7 +252,7 @@
- B43legacy_TX4_MAC_KEYALG_SHIFT) &
- B43legacy_TX4_MAC_KEYALG;
- wlhdr_len = ieee80211_hdrlen(wlhdr->frame_control);
-- iv_len = min((size_t)info->control.iv_len,
-+ iv_len = min((size_t)info->control.hw_key->iv_len,
- ARRAY_SIZE(txhdr->iv));
- memcpy(txhdr->iv, ((u8 *)wlhdr) + wlhdr_len, iv_len);
- } else {
---- a/net/mac80211/wep.c
-+++ b/net/mac80211/wep.c
-@@ -313,9 +313,6 @@
- {
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-
-- info->control.iv_len = WEP_IV_LEN;
-- info->control.icv_len = WEP_ICV_LEN;
--
- if (!(tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) {
- if (ieee80211_wep_encrypt(tx->local, skb, tx->key))
- return -1;
---- a/net/mac80211/wpa.c
-+++ b/net/mac80211/wpa.c
-@@ -152,9 +152,6 @@
- int len, tail;
- u8 *pos;
-
-- info->control.icv_len = TKIP_ICV_LEN;
-- info->control.iv_len = TKIP_IV_LEN;
--
- if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
- !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
- /* hwaccel - with no need for preallocated room for IV/ICV */
-@@ -374,9 +371,6 @@
- u8 *pos, *pn;
- int i;
-
-- info->control.icv_len = CCMP_MIC_LEN;
-- info->control.iv_len = CCMP_HDR_LEN;
--
- if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
- !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
- /* hwaccel - with no need for preallocated room for CCMP "
---- a/drivers/net/wireless/ath5k/base.c
-+++ b/drivers/net/wireless/ath5k/base.c
-@@ -1164,7 +1164,7 @@
-
- if (info->control.hw_key) {
- keyidx = info->control.hw_key->hw_key_idx;
-- pktlen += info->control.icv_len;
-+ pktlen += info->control.hw_key->icv_len;
- }
- ret = ah->ah_setup_tx_desc(ah, ds, pktlen,
- ieee80211_get_hdrlen_from_skb(skb), AR5K_PKT_TYPE_NORMAL,
---- a/drivers/net/wireless/ath9k/xmit.c
-+++ b/drivers/net/wireless/ath9k/xmit.c
-@@ -237,7 +237,7 @@
-
- if (tx_info->control.hw_key) {
- txctl->keyix = tx_info->control.hw_key->hw_key_idx;
-- txctl->frmlen += tx_info->control.icv_len;
-+ txctl->frmlen += tx_info->control.hw_key->icv_len;
-
- if (tx_info->control.hw_key->alg == ALG_WEP)
- txctl->keytype = ATH9K_KEY_TYPE_WEP;
---- a/drivers/net/wireless/rt2x00/rt2x00crypto.c
-+++ b/drivers/net/wireless/rt2x00/rt2x00crypto.c
-@@ -56,10 +56,10 @@
- * note that these lengths should only be added when
- * mac80211 does not generate it.
- */
-- overhead += tx_info->control.icv_len;
-+ overhead += key->icv_len;
-
- if (!(key->flags & IEEE80211_KEY_FLAG_GENERATE_IV))
-- overhead += tx_info->control.iv_len;
-+ overhead += key->iv_len;
-
- if (!(key->flags & IEEE80211_KEY_FLAG_GENERATE_MMIC)) {
- if (key->alg == ALG_TKIP)
---- a/drivers/net/wireless/rt2x00/rt2x00queue.c
-+++ b/drivers/net/wireless/rt2x00/rt2x00queue.c
-@@ -374,7 +374,7 @@
- struct queue_entry *entry = rt2x00queue_get_entry(queue, Q_INDEX);
- struct txentry_desc txdesc;
- struct skb_frame_desc *skbdesc;
-- unsigned int iv_len = IEEE80211_SKB_CB(skb)->control.iv_len;
-+ unsigned int iv_len;
-
- if (unlikely(rt2x00queue_full(queue)))
- return -EINVAL;
-@@ -410,8 +410,11 @@
- * the frame so we can provide it to the driver seperately.
- */
- if (test_bit(ENTRY_TXD_ENCRYPT, &txdesc.flags) &&
-- !test_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc.flags))
-+ !test_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc.flags) &&
-+ (IEEE80211_SKB_CB(skb)->control.hw_key != NULL)) {
-+ iv_len = IEEE80211_SKB_CB(skb)->control.hw_key->iv_len;
- rt2x00crypto_tx_remove_iv(skb, iv_len);
-+ }
-
- /*
- * It could be possible that the queue was corrupted and this
---- a/net/mac80211/key.c
-+++ b/net/mac80211/key.c
-@@ -281,6 +281,20 @@
- key->conf.alg = alg;
- key->conf.keyidx = idx;
- key->conf.keylen = key_len;
-+ switch (alg) {
-+ case ALG_WEP:
-+ key->conf.iv_len = WEP_IV_LEN;
-+ key->conf.icv_len = WEP_ICV_LEN;
-+ break;
-+ case ALG_TKIP:
-+ key->conf.iv_len = TKIP_IV_LEN;
-+ key->conf.icv_len = TKIP_ICV_LEN;
-+ break;
-+ case ALG_CCMP:
-+ key->conf.iv_len = CCMP_HDR_LEN;
-+ key->conf.icv_len = CCMP_MIC_LEN;
-+ break;
-+ }
- memcpy(key->conf.key, key_data, key_len);
- INIT_LIST_HEAD(&key->list);
- INIT_LIST_HEAD(&key->todo);
+++ /dev/null
-This patch adjusts the rate control API to allow multi-rate retry
-if supported by the driver. The ieee80211_hw struct specifies how
-many alternate rate selections the driver supports.
-
-Signed-off-by: Felix Fietkau <nbd@openwrt.org>
-
---- a/include/net/mac80211.h
-+++ b/include/net/mac80211.h
-@@ -292,6 +292,20 @@
- #define IEEE80211_TX_INFO_DRIVER_DATA_PTRS \
- (IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *))
-
-+/* maximum number of alternate rate retry stages */
-+#define IEEE80211_TX_MAX_ALTRATE 3
-+
-+/**
-+ * struct ieee80211_tx_altrate - alternate rate selection/status
-+ *
-+ * @rate_idx: rate index to attempt to send with
-+ * @limit: number of retries before fallback
-+ */
-+struct ieee80211_tx_altrate {
-+ s8 rate_idx;
-+ u8 limit;
-+};
-+
- /**
- * struct ieee80211_tx_info - skb transmit information
- *
-@@ -335,12 +349,14 @@
- struct ieee80211_key_conf *hw_key;
- struct ieee80211_sta *sta;
- unsigned long jiffies;
-- s8 rts_cts_rate_idx, alt_retry_rate_idx;
-+ s8 rts_cts_rate_idx;
- u8 retry_limit;
-+ struct ieee80211_tx_altrate retries[IEEE80211_TX_MAX_ALTRATE];
- } control;
- struct {
- u64 ampdu_ack_map;
- int ack_signal;
-+ struct ieee80211_tx_altrate retries[IEEE80211_TX_MAX_ALTRATE + 1];
- u8 retry_count;
- bool excessive_retries;
- u8 ampdu_ack_len;
-@@ -828,6 +844,9 @@
- * within &struct ieee80211_vif.
- * @sta_data_size: size (in bytes) of the drv_priv data area
- * within &struct ieee80211_sta.
-+ *
-+ * @max_altrates: maximum number of alternate rate retry stages
-+ * @max_altrate_tries: maximum number of tries for each stage
- */
- struct ieee80211_hw {
- struct ieee80211_conf conf;
-@@ -844,6 +863,8 @@
- u16 ampdu_queues;
- u16 max_listen_interval;
- s8 max_signal;
-+ u8 max_altrates;
-+ u8 max_altrate_tries;
- };
-
- struct ieee80211_hw *wiphy_to_hw(struct wiphy *wiphy);
-@@ -900,11 +921,11 @@
-
- static inline struct ieee80211_rate *
- ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw,
-- const struct ieee80211_tx_info *c)
-+ const struct ieee80211_tx_info *c, int idx)
- {
-- if (c->control.alt_retry_rate_idx < 0)
-+ if (c->control.retries[idx].rate_idx < 0)
- return NULL;
-- return &hw->wiphy->bands[c->band]->bitrates[c->control.alt_retry_rate_idx];
-+ return &hw->wiphy->bands[c->band]->bitrates[c->control.retries[idx].rate_idx];
- }
-
- /**
---- a/drivers/net/wireless/b43/xmit.c
-+++ b/drivers/net/wireless/b43/xmit.c
-@@ -208,7 +208,7 @@
- txrate = ieee80211_get_tx_rate(dev->wl->hw, info);
- rate = txrate ? txrate->hw_value : B43_CCK_RATE_1MB;
- rate_ofdm = b43_is_ofdm_rate(rate);
-- fbrate = ieee80211_get_alt_retry_rate(dev->wl->hw, info) ? : txrate;
-+ fbrate = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : txrate;
- rate_fb = fbrate->hw_value;
- rate_fb_ofdm = b43_is_ofdm_rate(rate_fb);
-
---- a/drivers/net/wireless/b43legacy/xmit.c
-+++ b/drivers/net/wireless/b43legacy/xmit.c
-@@ -210,7 +210,7 @@
-
- rate = tx_rate->hw_value;
- rate_ofdm = b43legacy_is_ofdm_rate(rate);
-- rate_fb = ieee80211_get_alt_retry_rate(dev->wl->hw, info) ? : tx_rate;
-+ rate_fb = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : tx_rate;
- rate_fb_ofdm = b43legacy_is_ofdm_rate(rate_fb->hw_value);
-
- txhdr->mac_frame_ctl = wlhdr->frame_control;
---- a/drivers/net/wireless/rtl8180_dev.c
-+++ b/drivers/net/wireless/rtl8180_dev.c
-@@ -292,8 +292,8 @@
- entry->plcp_len = cpu_to_le16(plcp_len);
- entry->tx_buf = cpu_to_le32(mapping);
- entry->frame_len = cpu_to_le32(skb->len);
-- entry->flags2 = info->control.alt_retry_rate_idx >= 0 ?
-- ieee80211_get_alt_retry_rate(dev, info)->bitrate << 4 : 0;
-+ entry->flags2 = info->control.retries[0].rate_idx >= 0 ?
-+ ieee80211_get_alt_retry_rate(dev, info, 0)->bitrate << 4 : 0;
- entry->retry_limit = info->control.retry_limit;
- entry->flags = cpu_to_le32(tx_flags);
- __skb_queue_tail(&ring->queue, skb);
-@@ -855,6 +855,7 @@
- priv = dev->priv;
- priv->pdev = pdev;
-
-+ dev->max_altrates = 1;
- SET_IEEE80211_DEV(dev, &pdev->dev);
- pci_set_drvdata(pdev, dev);
-
---- a/net/mac80211/tx.c
-+++ b/net/mac80211/tx.c
-@@ -454,15 +454,16 @@
- if (unlikely(rsel.probe_idx >= 0)) {
- info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
- tx->flags |= IEEE80211_TX_PROBE_LAST_FRAG;
-- info->control.alt_retry_rate_idx = tx->rate_idx;
-+ info->control.retries[0].rate_idx = tx->rate_idx;
-+ info->control.retries[0].limit = tx->local->hw.max_altrate_tries;
- tx->rate_idx = rsel.probe_idx;
-- } else
-- info->control.alt_retry_rate_idx = -1;
-+ } else if (info->control.retries[0].limit == 0)
-+ info->control.retries[0].rate_idx = -1;
-
- if (unlikely(tx->rate_idx < 0))
- return TX_DROP;
- } else
-- info->control.alt_retry_rate_idx = -1;
-+ info->control.retries[0].rate_idx = -1;
-
- if (tx->sdata->bss_conf.use_cts_prot &&
- (tx->flags & IEEE80211_TX_FRAGMENTED) && (rsel.nonerp_idx >= 0)) {
-@@ -521,7 +522,7 @@
- * frames.
- * TODO: The last fragment could still use multiple retry
- * rates. */
-- info->control.alt_retry_rate_idx = -1;
-+ info->control.retries[0].rate_idx = -1;
- }
-
- /* Use CTS protection for unicast frames sent using extended rates if
-@@ -551,7 +552,7 @@
- int idx;
-
- /* Do not use multiple retry rates when using RTS/CTS */
-- info->control.alt_retry_rate_idx = -1;
-+ info->control.retries[0].rate_idx = -1;
-
- /* Use min(data rate, max base rate) as CTS/RTS rate */
- rate = &sband->bitrates[tx->rate_idx];
---- a/drivers/net/wireless/b43/main.c
-+++ b/drivers/net/wireless/b43/main.c
-@@ -4588,6 +4588,7 @@
- BIT(NL80211_IFTYPE_ADHOC);
-
- hw->queues = b43_modparam_qos ? 4 : 1;
-+ hw->max_altrates = 1;
- SET_IEEE80211_DEV(hw, dev->dev);
- if (is_valid_ether_addr(sprom->et1mac))
- SET_IEEE80211_PERM_ADDR(hw, sprom->et1mac);
---- a/drivers/net/wireless/b43legacy/main.c
-+++ b/drivers/net/wireless/b43legacy/main.c
-@@ -3710,6 +3710,7 @@
- BIT(NL80211_IFTYPE_WDS) |
- BIT(NL80211_IFTYPE_ADHOC);
- hw->queues = 1; /* FIXME: hardware has more queues */
-+ hw->max_altrates = 1;
- SET_IEEE80211_DEV(hw, dev->dev);
- if (is_valid_ether_addr(sprom->et1mac))
- SET_IEEE80211_PERM_ADDR(hw, sprom->et1mac);
+++ /dev/null
-Clean up the tx status reporting, fix retry counters (short retries are
-virtual collisions, not actual retries). Implement multi-rate retry
-support.
-This also fixes strong throughput fluctuations with rc80211_pid
-
-Signed-off-by: Felix Fietkau <nbd@openwrt.org>
-
---- a/drivers/net/wireless/ath5k/base.c
-+++ b/drivers/net/wireless/ath5k/base.c
-@@ -530,6 +530,12 @@
- goto err_irq;
- }
-
-+ /* set up multi-rate retry capabilities */
-+ if (sc->ah->ah_version == AR5K_AR5212) {
-+ hw->max_altrates = 3;
-+ hw->max_altrate_tries = 11;
-+ }
-+
- /* Finish private driver data initialization */
- ret = ath5k_attach(pdev, hw);
- if (ret)
-@@ -1149,7 +1155,9 @@
- struct sk_buff *skb = bf->skb;
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID;
-- int ret;
-+ struct ieee80211_rate *rate;
-+ unsigned int mrr_rate[3], mrr_tries[3];
-+ int i, ret;
-
- flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK;
-
-@@ -1174,6 +1182,22 @@
- if (ret)
- goto err_unmap;
-
-+ memset(mrr_rate, 0, sizeof(mrr_rate));
-+ memset(mrr_tries, 0, sizeof(mrr_tries));
-+ for (i = 0; i < 3; i++) {
-+ rate = ieee80211_get_alt_retry_rate(sc->hw, info, i);
-+ if (!rate)
-+ break;
-+
-+ mrr_rate[i] = rate->hw_value;
-+ mrr_tries[i] = info->control.retries[i].limit;
-+ }
-+
-+ ah->ah_setup_mrr_tx_desc(ah, ds,
-+ mrr_rate[0], mrr_tries[0],
-+ mrr_rate[1], mrr_tries[1],
-+ mrr_rate[2], mrr_tries[2]);
-+
- ds->ds_link = 0;
- ds->ds_data = bf->skbaddr;
-
-@@ -1790,7 +1814,7 @@
- struct ath5k_desc *ds;
- struct sk_buff *skb;
- struct ieee80211_tx_info *info;
-- int ret;
-+ int i, ret;
-
- spin_lock(&txq->lock);
- list_for_each_entry_safe(bf, bf0, &txq->q, list) {
-@@ -1812,7 +1836,25 @@
- pci_unmap_single(sc->pdev, bf->skbaddr, skb->len,
- PCI_DMA_TODEVICE);
-
-- info->status.retry_count = ts.ts_shortretry + ts.ts_longretry / 6;
-+ memset(&info->status, 0, sizeof(info->status));
-+ info->tx_rate_idx = ath5k_hw_to_driver_rix(sc,
-+ ts.ts_rate[ts.ts_final_idx]);
-+ info->status.retry_count = ts.ts_longretry;
-+
-+ for (i = 0; i < 4; i++) {
-+ struct ieee80211_tx_altrate *r =
-+ &info->status.retries[i];
-+
-+ if (ts.ts_rate[i]) {
-+ r->rate_idx = ath5k_hw_to_driver_rix(sc, ts.ts_rate[i]);
-+ r->limit = ts.ts_retry[i];
-+ } else {
-+ r->rate_idx = -1;
-+ r->limit = 0;
-+ }
-+ }
-+
-+ info->status.excessive_retries = 0;
- if (unlikely(ts.ts_status)) {
- sc->ll_stats.dot11ACKFailureCount++;
- if (ts.ts_status & AR5K_TXERR_XRETRY)
---- a/drivers/net/wireless/ath5k/desc.c
-+++ b/drivers/net/wireless/ath5k/desc.c
-@@ -318,6 +318,15 @@
- return 0;
- }
-
-+/* no mrr support for cards older than 5212 */
-+static int
-+ath5k_hw_setup_no_mrr(struct ath5k_hw *ah, struct ath5k_desc *desc,
-+ unsigned int tx_rate1, u_int tx_tries1, u_int tx_rate2,
-+ u_int tx_tries2, unsigned int tx_rate3, u_int tx_tries3)
-+{
-+ return 0;
-+}
-+
- /*
- * Proccess the tx status descriptor on 5210/5211
- */
-@@ -352,8 +361,10 @@
- AR5K_DESC_TX_STATUS1_ACK_SIG_STRENGTH);
- ts->ts_antenna = 1;
- ts->ts_status = 0;
-- ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_0,
-+ ts->ts_rate[0] = AR5K_REG_MS(tx_ctl->tx_control_0,
- AR5K_2W_TX_DESC_CTL0_XMIT_RATE);
-+ ts->ts_retry[0] = ts->ts_longretry;
-+ ts->ts_final_idx = 0;
-
- if (!(tx_status->tx_status_0 & AR5K_DESC_TX_STATUS0_FRAME_XMIT_OK)) {
- if (tx_status->tx_status_0 &
-@@ -405,29 +416,43 @@
- AR5K_DESC_TX_STATUS1_XMIT_ANTENNA) ? 2 : 1;
- ts->ts_status = 0;
-
-- switch (AR5K_REG_MS(tx_status->tx_status_1,
-- AR5K_DESC_TX_STATUS1_FINAL_TS_INDEX)) {
-- case 0:
-- ts->ts_rate = tx_ctl->tx_control_3 &
-- AR5K_4W_TX_DESC_CTL3_XMIT_RATE0;
-- break;
-+ ts->ts_final_idx = AR5K_REG_MS(tx_status->tx_status_1,
-+ AR5K_DESC_TX_STATUS1_FINAL_TS_INDEX);
-+
-+ /* The longretry counter has the number of un-acked retries
-+ * for the final rate. To get the total number of retries
-+ * we have to add the retry counters for the other rates
-+ * as well
-+ */
-+ ts->ts_retry[ts->ts_final_idx] = ts->ts_longretry;
-+ switch (ts->ts_final_idx) {
-+ case 3:
-+ ts->ts_rate[3] = AR5K_REG_MS(tx_ctl->tx_control_3,
-+ AR5K_4W_TX_DESC_CTL3_XMIT_RATE3);
-+
-+ ts->ts_retry[2] = AR5K_REG_MS(tx_ctl->tx_control_2,
-+ AR5K_4W_TX_DESC_CTL2_XMIT_TRIES2);
-+ ts->ts_longretry += ts->ts_retry[2];
-+ /* fall through */
-+ case 2:
-+ ts->ts_rate[2] = AR5K_REG_MS(tx_ctl->tx_control_3,
-+ AR5K_4W_TX_DESC_CTL3_XMIT_RATE2);
-+
-+ ts->ts_retry[1] = AR5K_REG_MS(tx_ctl->tx_control_2,
-+ AR5K_4W_TX_DESC_CTL2_XMIT_TRIES1);
-+ ts->ts_longretry += ts->ts_retry[1];
-+ /* fall through */
- case 1:
-- ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_3,
-+ ts->ts_rate[1] = AR5K_REG_MS(tx_ctl->tx_control_3,
- AR5K_4W_TX_DESC_CTL3_XMIT_RATE1);
-- ts->ts_longretry += AR5K_REG_MS(tx_ctl->tx_control_2,
-+
-+ ts->ts_retry[0] = AR5K_REG_MS(tx_ctl->tx_control_2,
- AR5K_4W_TX_DESC_CTL2_XMIT_TRIES1);
-- break;
-- case 2:
-- ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_3,
-- AR5K_4W_TX_DESC_CTL3_XMIT_RATE2);
-- ts->ts_longretry += AR5K_REG_MS(tx_ctl->tx_control_2,
-- AR5K_4W_TX_DESC_CTL2_XMIT_TRIES2);
-- break;
-- case 3:
-- ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_3,
-- AR5K_4W_TX_DESC_CTL3_XMIT_RATE3);
-- ts->ts_longretry += AR5K_REG_MS(tx_ctl->tx_control_2,
-- AR5K_4W_TX_DESC_CTL2_XMIT_TRIES3);
-+ ts->ts_longretry += ts->ts_retry[0];
-+ /* fall through */
-+ case 0:
-+ ts->ts_rate[0] = tx_ctl->tx_control_3 &
-+ AR5K_4W_TX_DESC_CTL3_XMIT_RATE0;
- break;
- }
-
-@@ -653,7 +678,7 @@
- } else {
- ah->ah_setup_rx_desc = ath5k_hw_setup_rx_desc;
- ah->ah_setup_tx_desc = ath5k_hw_setup_2word_tx_desc;
-- ah->ah_setup_mrr_tx_desc = ath5k_hw_setup_mrr_tx_desc;
-+ ah->ah_setup_mrr_tx_desc = ath5k_hw_setup_no_mrr;
- ah->ah_proc_tx_desc = ath5k_hw_proc_2word_tx_status;
- }
-
---- a/drivers/net/wireless/ath5k/ath5k.h
-+++ b/drivers/net/wireless/ath5k/ath5k.h
-@@ -418,7 +418,9 @@
- u16 ts_seqnum;
- u16 ts_tstamp;
- u8 ts_status;
-- u8 ts_rate;
-+ u8 ts_rate[4];
-+ u8 ts_retry[4];
-+ u8 ts_final_idx;
- s8 ts_rssi;
- u8 ts_shortretry;
- u8 ts_longretry;
+++ /dev/null
---- /dev/null
-+++ b/net/mac80211/rc80211_minstrel.c
-@@ -0,0 +1,583 @@
-+/*
-+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
-+ *
-+ * 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.
-+ *
-+ * Based on minstrel.c:
-+ * Copyright (C) 2005-2007 Derek Smithies <derek@indranet.co.nz>
-+ * Sponsored by Indranet Technologies Ltd
-+ *
-+ * Based on sample.c:
-+ * Copyright (c) 2005 John Bicket
-+ * All rights reserved.
-+ *
-+ * Redistribution and use in source and binary forms, with or without
-+ * modification, are permitted provided that the following conditions
-+ * are met:
-+ * 1. Redistributions of source code must retain the above copyright
-+ * notice, this list of conditions and the following disclaimer,
-+ * without modification.
-+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
-+ * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
-+ * redistribution must be conditioned upon including a substantially
-+ * similar Disclaimer requirement for further binary redistribution.
-+ * 3. Neither the names of the above-listed copyright holders nor the names
-+ * of any contributors may be used to endorse or promote products derived
-+ * from this software without specific prior written permission.
-+ *
-+ * Alternatively, this software may be distributed under the terms of the
-+ * GNU General Public License ("GPL") version 2 as published by the Free
-+ * Software Foundation.
-+ *
-+ * NO WARRANTY
-+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-+ * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
-+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
-+ * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
-+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
-+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
-+ * THE POSSIBILITY OF SUCH DAMAGES.
-+ */
-+#include <linux/netdevice.h>
-+#include <linux/types.h>
-+#include <linux/skbuff.h>
-+#include <linux/debugfs.h>
-+#include <linux/random.h>
-+#include <linux/ieee80211.h>
-+#include <net/mac80211.h>
-+#include "rate.h"
-+#include "rc80211_minstrel.h"
-+
-+#define SAMPLE_COLUMNS 10
-+#define SAMPLE_TBL(_mi, _idx, _col) \
-+ _mi->sample_table[(_idx * SAMPLE_COLUMNS) + _col]
-+
-+/* convert mac80211 rate index to local array index */
-+static inline int
-+rix_to_ndx(struct minstrel_sta_info *mi, int rix)
-+{
-+ int i = rix;
-+ for (i = rix; i >= 0; i--)
-+ if (mi->r[i].rix == rix)
-+ break;
-+ WARN_ON(mi->r[i].rix != rix);
-+ return i;
-+}
-+
-+static inline bool
-+use_low_rate(struct sk_buff *skb)
-+{
-+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
-+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-+ u16 fc;
-+
-+ fc = le16_to_cpu(hdr->frame_control);
-+
-+ return ((info->flags & IEEE80211_TX_CTL_NO_ACK) ||
-+ (fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA ||
-+ is_multicast_ether_addr(hdr->addr1));
-+}
-+
-+
-+static void
-+minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi)
-+{
-+ u32 max_tp = 0, index_max_tp = 0, index_max_tp2 = 0;
-+ u32 max_prob = 0, index_max_prob = 0;
-+ u32 usecs;
-+ u32 p;
-+ int i;
-+
-+ mi->stats_update = jiffies;
-+ for (i = 0; i < mi->n_rates; i++) {
-+ struct minstrel_rate *mr = &mi->r[i];
-+
-+ usecs = mr->perfect_tx_time;
-+ if (!usecs)
-+ usecs = 1000000;
-+
-+ /* To avoid rounding issues, probabilities scale from 0 (0%)
-+ * to 18000 (100%) */
-+ if (mr->attempts) {
-+ p = (mr->success * 18000) / mr->attempts;
-+ mr->succ_hist += mr->success;
-+ mr->att_hist += mr->attempts;
-+ mr->cur_prob = p;
-+ p = ((p * (100 - mp->ewma_level)) + (mr->probability *
-+ mp->ewma_level)) / 100;
-+ mr->probability = p;
-+ mr->cur_tp = p * (1000000 / usecs);
-+ }
-+
-+ mr->last_success = mr->success;
-+ mr->last_attempts = mr->attempts;
-+ mr->success = 0;
-+ mr->attempts = 0;
-+
-+ /* Sample less often below the 10% chance of success.
-+ * Sample less often above the 95% chance of success. */
-+ if ((mr->probability > 17100) || (mr->probability < 1800)) {
-+ mr->adjusted_retry_count = mr->retry_count >> 1;
-+ if (mr->adjusted_retry_count > 2)
-+ mr->adjusted_retry_count = 2;
-+ } else {
-+ mr->adjusted_retry_count = mr->retry_count;
-+ }
-+ if (!mr->adjusted_retry_count)
-+ mr->adjusted_retry_count = 2;
-+ }
-+
-+ for (i = 0; i < mi->n_rates; i++) {
-+ struct minstrel_rate *mr = &mi->r[i];
-+ if (max_tp < mr->cur_tp) {
-+ index_max_tp = i;
-+ max_tp = mr->cur_tp;
-+ }
-+ if (max_prob < mr->probability) {
-+ index_max_prob = i;
-+ max_prob = mr->probability;
-+ }
-+ }
-+
-+ max_tp = 0;
-+ for (i = 0; i < mi->n_rates; i++) {
-+ struct minstrel_rate *mr = &mi->r[i];
-+
-+ if (i == index_max_tp)
-+ continue;
-+
-+ if (max_tp < mr->cur_tp) {
-+ index_max_tp2 = i;
-+ max_tp = mr->cur_tp;
-+ }
-+ }
-+ mi->max_tp_rate = index_max_tp;
-+ mi->max_tp_rate2 = index_max_tp2;
-+ mi->max_prob_rate = index_max_prob;
-+}
-+
-+static void
-+minstrel_tx_status(void *priv, struct ieee80211_supported_band *sband,
-+ struct ieee80211_sta *sta, void *priv_sta,
-+ struct sk_buff *skb)
-+{
-+ struct minstrel_sta_info *mi = priv_sta;
-+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-+ struct ieee80211_tx_altrate *ar = info->status.retries;
-+ struct minstrel_priv *mp = priv;
-+ int i, ndx, tries;
-+ int success = 0;
-+
-+ if (!info->status.excessive_retries)
-+ success = 1;
-+
-+ if (!mp->has_mrr || (ar[0].rate_idx < 0)) {
-+ ndx = rix_to_ndx(mi, info->tx_rate_idx);
-+ tries = info->status.retry_count + 1;
-+ mi->r[ndx].success += success;
-+ mi->r[ndx].attempts += tries;
-+ return;
-+ }
-+
-+ for (i = 0; i < 4; i++) {
-+ if (ar[i].rate_idx < 0)
-+ break;
-+
-+ ndx = rix_to_ndx(mi, ar[i].rate_idx);
-+ mi->r[ndx].attempts += ar[i].limit + 1;
-+
-+ if ((i != 3) && (ar[i + 1].rate_idx < 0))
-+ mi->r[ndx].success += success;
-+ }
-+
-+ if ((info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) && (i >= 0))
-+ mi->sample_count++;
-+
-+ if (mi->sample_deferred > 0)
-+ mi->sample_deferred--;
-+}
-+
-+
-+static inline unsigned int
-+minstrel_get_retry_count(struct minstrel_rate *mr,
-+ struct ieee80211_tx_info *info)
-+{
-+ unsigned int retry = mr->adjusted_retry_count;
-+
-+ if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
-+ retry = max(2U, min(mr->retry_count_rtscts, retry));
-+ else if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT)
-+ retry = max(2U, min(mr->retry_count_cts, retry));
-+ return retry;
-+}
-+
-+
-+static int
-+minstrel_get_next_sample(struct minstrel_sta_info *mi)
-+{
-+ unsigned int sample_ndx;
-+ sample_ndx = SAMPLE_TBL(mi, mi->sample_idx, mi->sample_column);
-+ mi->sample_idx++;
-+ if (mi->sample_idx > (mi->n_rates - 2)) {
-+ mi->sample_idx = 0;
-+ mi->sample_column++;
-+ if (mi->sample_column >= SAMPLE_COLUMNS)
-+ mi->sample_column = 0;
-+ }
-+ return sample_ndx;
-+}
-+
-+void
-+minstrel_get_rate(void *priv, struct ieee80211_supported_band *sband,
-+ struct ieee80211_sta *sta, void *priv_sta,
-+ struct sk_buff *skb, struct rate_selection *sel)
-+{
-+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-+ struct minstrel_sta_info *mi = priv_sta;
-+ struct minstrel_priv *mp = priv;
-+ struct ieee80211_tx_altrate *ar = info->control.retries;
-+ unsigned int ndx, sample_ndx = 0;
-+ bool mrr;
-+ bool sample_slower = false;
-+ bool sample = false;
-+ int i, delta;
-+ int mrr_ndx[3];
-+ int sample_rate;
-+
-+ if (!sta || !mi || use_low_rate(skb)) {
-+ sel->rate_idx = rate_lowest_index(sband, sta);
-+ return;
-+ }
-+
-+ mrr = mp->has_mrr;
-+
-+ /* mac80211 does not allow mrr for RTS/CTS */
-+ if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) ||
-+ (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
-+ mrr = false;
-+
-+ if (time_after(jiffies, mi->stats_update + (mp->update_interval *
-+ HZ) / 1000))
-+ minstrel_update_stats(mp, mi);
-+
-+ ndx = mi->max_tp_rate;
-+
-+ if (mrr)
-+ sample_rate = mp->lookaround_rate_mrr;
-+ else
-+ sample_rate = mp->lookaround_rate;
-+
-+ mi->packet_count++;
-+ delta = (mi->packet_count * sample_rate / 100) -
-+ (mi->sample_count + mi->sample_deferred / 2);
-+
-+ /* delta > 0: sampling required */
-+ if (delta > 0) {
-+ if (mi->packet_count >= 10000) {
-+ mi->sample_deferred = 0;
-+ mi->sample_count = 0;
-+ mi->packet_count = 0;
-+ } else if (delta > mi->n_rates * 2) {
-+ /* With multi-rate retry, not every planned sample
-+ * attempt actually gets used, due to the way the retry
-+ * chain is set up - [max_tp,sample,prob,lowest] for
-+ * sample_rate < max_tp.
-+ *
-+ * If there's too much sampling backlog and the link
-+ * starts getting worse, minstrel would start bursting
-+ * out lots of sampling frames, which would result
-+ * in a large throughput loss. */
-+ mi->sample_count += (delta - mi->n_rates * 2);
-+ }
-+
-+ sample_ndx = minstrel_get_next_sample(mi);
-+ sample = true;
-+ sample_slower = mrr && (mi->r[sample_ndx].perfect_tx_time >
-+ mi->r[ndx].perfect_tx_time);
-+
-+ if (!sample_slower) {
-+ ndx = sample_ndx;
-+ mi->sample_count++;
-+ } else {
-+ /* Only use IEEE80211_TX_CTL_RATE_CTRL_PROBE to mark
-+ * packets that have the sampling rate deferred to the
-+ * second MRR stage. Increase the sample counter only
-+ * if the deferred sample rate was actually used.
-+ * Use the sample_deferred counter to make sure that
-+ * the sampling is not done in large bursts */
-+ info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
-+ mi->sample_deferred++;
-+ }
-+ }
-+ sel->rate_idx = mi->r[ndx].rix;
-+ info->control.retry_limit = minstrel_get_retry_count(&mi->r[ndx], info);
-+
-+ if (!mrr) {
-+ ar[0].rate_idx = mi->lowest_rix;
-+ ar[0].limit = mp->max_retry;
-+ ar[1].rate_idx = -1;
-+ return;
-+ }
-+
-+ /* MRR setup */
-+ if (sample) {
-+ if (sample_slower)
-+ mrr_ndx[0] = sample_ndx;
-+ else
-+ mrr_ndx[0] = mi->max_tp_rate;
-+ } else {
-+ mrr_ndx[0] = mi->max_tp_rate2;
-+ }
-+ mrr_ndx[1] = mi->max_prob_rate;
-+ mrr_ndx[2] = 0;
-+ for (i = 0; i < 3; i++) {
-+ ar[i].rate_idx = mi->r[mrr_ndx[i]].rix;
-+ ar[i].limit = mi->r[mrr_ndx[i]].adjusted_retry_count;
-+ }
-+}
-+
-+
-+static void
-+calc_rate_durations(struct minstrel_sta_info *mi, struct ieee80211_local *local,
-+ struct minstrel_rate *d, struct ieee80211_rate *rate)
-+{
-+ int erp = !!(rate->flags & IEEE80211_RATE_ERP_G);
-+
-+ d->perfect_tx_time = ieee80211_frame_duration(local, 1200,
-+ rate->bitrate, erp, 1);
-+ d->ack_time = ieee80211_frame_duration(local, 10,
-+ rate->bitrate, erp, 1);
-+}
-+
-+static void
-+init_sample_table(struct minstrel_sta_info *mi)
-+{
-+ unsigned int i, col, new_idx;
-+ unsigned int n_srates = mi->n_rates - 1;
-+ u8 rnd[8];
-+
-+ mi->sample_column = 0;
-+ mi->sample_idx = 0;
-+ memset(mi->sample_table, 0, SAMPLE_COLUMNS * mi->n_rates);
-+
-+ for (col = 0; col < SAMPLE_COLUMNS; col++) {
-+ for (i = 0; i < n_srates; i++) {
-+ get_random_bytes(rnd, sizeof(rnd));
-+ new_idx = (i + rnd[i & 7]) % n_srates;
-+
-+ while (SAMPLE_TBL(mi, new_idx, col) != 0)
-+ new_idx = (new_idx + 1) % n_srates;
-+
-+ /* Don't sample the slowest rate (i.e. slowest base
-+ * rate). We must presume that the slowest rate works
-+ * fine, or else other management frames will also be
-+ * failing and the link will break */
-+ SAMPLE_TBL(mi, new_idx, col) = i + 1;
-+ }
-+ }
-+}
-+
-+static void
-+minstrel_rate_init(void *priv, struct ieee80211_supported_band *sband,
-+ struct ieee80211_sta *sta, void *priv_sta)
-+{
-+ struct minstrel_sta_info *mi = priv_sta;
-+ struct minstrel_priv *mp = priv;
-+ struct minstrel_rate *mr_ctl;
-+ unsigned int i, n = 0;
-+ unsigned int t_slot = 9; /* FIXME: get real slot time */
-+
-+ mi->lowest_rix = rate_lowest_index(sband, sta);
-+ mr_ctl = &mi->r[rix_to_ndx(mi, mi->lowest_rix)];
-+ mi->sp_ack_dur = mr_ctl->ack_time;
-+
-+ for (i = 0; i < sband->n_bitrates; i++) {
-+ struct minstrel_rate *mr = &mi->r[n];
-+ unsigned int tx_time = 0, tx_time_cts = 0, tx_time_rtscts = 0;
-+ unsigned int tx_time_single;
-+ unsigned int cw = mp->cw_min;
-+
-+ if (!rate_supported(sta, sband->band, i))
-+ continue;
-+ n++;
-+ memset(mr, 0, sizeof(*mr));
-+
-+ mr->rix = i;
-+ mr->bitrate = sband->bitrates[i].bitrate / 5;
-+ calc_rate_durations(mi, hw_to_local(mp->hw), mr,
-+ &sband->bitrates[i]);
-+
-+ /* calculate maximum number of retransmissions before
-+ * fallback (based on maximum segment size) */
-+ mr->retry_count = 1;
-+ mr->retry_count_cts = 1;
-+ mr->retry_count_rtscts = 1;
-+ tx_time = mr->perfect_tx_time + mi->sp_ack_dur;
-+ do {
-+ /* add one retransmission */
-+ tx_time_single = mr->ack_time + mr->perfect_tx_time;
-+
-+ /* contention window */
-+ tx_time_single += t_slot + min(cw, mp->cw_max);
-+ cw = (cw + 1) << 1;
-+
-+ tx_time += tx_time_single;
-+ tx_time_cts += tx_time_single + mi->sp_ack_dur;
-+ tx_time_rtscts += tx_time_single + 2 * mi->sp_ack_dur;
-+ if ((tx_time_cts < mp->segment_size) &&
-+ (mr->retry_count_cts < mp->max_retry))
-+ mr->retry_count_cts++;
-+ if ((tx_time_rtscts < mp->segment_size) &&
-+ (mr->retry_count_rtscts < mp->max_retry))
-+ mr->retry_count_rtscts++;
-+ } while ((tx_time < mp->segment_size) &&
-+ (++mr->retry_count < mp->max_retry));
-+ mr->adjusted_retry_count = mr->retry_count;
-+ }
-+
-+ for (i = n; i < sband->n_bitrates; i++) {
-+ struct minstrel_rate *mr = &mi->r[i];
-+ mr->rix = -1;
-+ }
-+
-+ mi->n_rates = n;
-+ mi->stats_update = jiffies;
-+
-+ init_sample_table(mi);
-+}
-+
-+static void *
-+minstrel_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp)
-+{
-+ struct ieee80211_supported_band *sband;
-+ struct minstrel_sta_info *mi;
-+ struct minstrel_priv *mp = priv;
-+ struct ieee80211_hw *hw = mp->hw;
-+ int max_rates = 0;
-+ int i;
-+
-+ mi = kzalloc(sizeof(struct minstrel_sta_info), gfp);
-+ if (!mi)
-+ return NULL;
-+
-+ for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
-+ sband = hw->wiphy->bands[hw->conf.channel->band];
-+ if (sband->n_bitrates > max_rates)
-+ max_rates = sband->n_bitrates;
-+ }
-+
-+ mi->r = kzalloc(sizeof(struct minstrel_rate) * max_rates, gfp);
-+ if (!mi->r)
-+ goto error;
-+
-+ mi->sample_table = kmalloc(SAMPLE_COLUMNS * max_rates, gfp);
-+ if (!mi->sample_table)
-+ goto error1;
-+
-+ mi->stats_update = jiffies;
-+ return mi;
-+
-+error1:
-+ kfree(mi->r);
-+error:
-+ kfree(mi);
-+ return NULL;
-+}
-+
-+static void
-+minstrel_free_sta(void *priv, struct ieee80211_sta *sta, void *priv_sta)
-+{
-+ struct minstrel_sta_info *mi = priv_sta;
-+
-+ kfree(mi->sample_table);
-+ kfree(mi->r);
-+ kfree(mi);
-+}
-+
-+static void
-+minstrel_clear(void *priv)
-+{
-+}
-+
-+static void *
-+minstrel_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
-+{
-+ struct minstrel_priv *mp;
-+
-+ mp = kzalloc(sizeof(struct minstrel_priv), GFP_ATOMIC);
-+ if (!mp)
-+ return NULL;
-+
-+ /* contention window settings
-+ * Just an approximation. Using the per-queue values would complicate
-+ * the calculations and is probably unnecessary */
-+ mp->cw_min = 15;
-+ mp->cw_max = 1023;
-+
-+ /* number of packets (in %) to use for sampling other rates
-+ * sample less often for non-mrr packets, because the overhead
-+ * is much higher than with mrr */
-+ mp->lookaround_rate = 5;
-+ mp->lookaround_rate_mrr = 10;
-+
-+ /* moving average weight for EWMA */
-+ mp->ewma_level = 75;
-+
-+ /* maximum time that the hw is allowed to stay in one MRR segment */
-+ mp->segment_size = 6000;
-+
-+ if (hw->max_altrate_tries > 0)
-+ mp->max_retry = hw->max_altrate_tries;
-+ else
-+ /* safe default, does not necessarily have to match hw properties */
-+ mp->max_retry = 7;
-+
-+ if (hw->max_altrates >= 3)
-+ mp->has_mrr = true;
-+
-+ mp->hw = hw;
-+ mp->update_interval = 100;
-+
-+ return mp;
-+}
-+
-+static void
-+minstrel_free(void *priv)
-+{
-+ kfree(priv);
-+}
-+
-+static struct rate_control_ops mac80211_minstrel = {
-+ .name = "minstrel",
-+ .tx_status = minstrel_tx_status,
-+ .get_rate = minstrel_get_rate,
-+ .rate_init = minstrel_rate_init,
-+ .clear = minstrel_clear,
-+ .alloc = minstrel_alloc,
-+ .free = minstrel_free,
-+ .alloc_sta = minstrel_alloc_sta,
-+ .free_sta = minstrel_free_sta,
-+#ifdef CONFIG_MAC80211_DEBUGFS
-+ .add_sta_debugfs = minstrel_add_sta_debugfs,
-+ .remove_sta_debugfs = minstrel_remove_sta_debugfs,
-+#endif
-+};
-+
-+int __init
-+rc80211_minstrel_init(void)
-+{
-+ return ieee80211_rate_control_register(&mac80211_minstrel);
-+}
-+
-+void
-+rc80211_minstrel_exit(void)
-+{
-+ ieee80211_rate_control_unregister(&mac80211_minstrel);
-+}
-+
---- a/net/mac80211/Makefile
-+++ b/net/mac80211/Makefile
-@@ -41,4 +41,8 @@
- rc80211_pid-y := rc80211_pid_algo.o
- rc80211_pid-$(CONFIG_MAC80211_DEBUGFS) += rc80211_pid_debugfs.o
-
-+rc80211_minstrel-y := rc80211_minstrel.o
-+rc80211_minstrel-$(CONFIG_MAC80211_DEBUGFS) += rc80211_minstrel_debugfs.o
-+
- mac80211-$(CONFIG_MAC80211_RC_PID) += $(rc80211_pid-y)
-+mac80211-$(CONFIG_MAC80211_RC_MINSTREL) += $(rc80211_minstrel-y)
---- a/net/mac80211/main.c
-+++ b/net/mac80211/main.c
-@@ -1015,6 +1015,10 @@
- BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
- IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
-
-+ ret = rc80211_minstrel_init();
-+ if (ret)
-+ return ret;
-+
- ret = rc80211_pid_init();
- if (ret)
- return ret;
-@@ -1027,6 +1031,7 @@
- static void __exit ieee80211_exit(void)
- {
- rc80211_pid_exit();
-+ rc80211_minstrel_exit();
-
- /*
- * For key todo, it'll be empty by now but the work
---- a/net/mac80211/rate.h
-+++ b/net/mac80211/rate.h
-@@ -125,4 +125,18 @@
- }
- #endif
-
-+#ifdef CONFIG_MAC80211_RC_MINSTREL
-+extern int rc80211_minstrel_init(void);
-+extern void rc80211_minstrel_exit(void);
-+#else
-+static inline int rc80211_minstrel_init(void)
-+{
-+ return 0;
-+}
-+static inline void rc80211_minstrel_exit(void)
-+{
-+}
-+#endif
-+
-+
- #endif /* IEEE80211_RATE_H */
---- /dev/null
-+++ b/net/mac80211/rc80211_minstrel.h
-@@ -0,0 +1,85 @@
-+/*
-+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
-+ *
-+ * 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.
-+ */
-+
-+#ifndef __RC_MINSTREL_H
-+#define __RC_MINSTREL_H
-+
-+struct minstrel_rate {
-+ int bitrate;
-+ int rix;
-+
-+ unsigned int perfect_tx_time;
-+ unsigned int ack_time;
-+
-+ unsigned int retry_count;
-+ unsigned int retry_count_cts;
-+ unsigned int retry_count_rtscts;
-+ unsigned int adjusted_retry_count;
-+
-+ u32 success;
-+ u32 attempts;
-+ u32 last_attempts;
-+ u32 last_success;
-+
-+ /* parts per thousand */
-+ u32 cur_prob;
-+ u32 probability;
-+
-+ /* per-rate throughput */
-+ u32 cur_tp;
-+ u32 throughput;
-+
-+ u64 succ_hist;
-+ u64 att_hist;
-+};
-+
-+struct minstrel_sta_info {
-+ unsigned long stats_update;
-+ unsigned int sp_ack_dur;
-+ unsigned int rate_avg;
-+
-+ unsigned int lowest_rix;
-+
-+ unsigned int max_tp_rate;
-+ unsigned int max_tp_rate2;
-+ unsigned int max_prob_rate;
-+ unsigned int packet_count;
-+ unsigned int sample_count;
-+ int sample_deferred;
-+
-+ unsigned int sample_idx;
-+ unsigned int sample_column;
-+
-+ int n_rates;
-+ struct minstrel_rate *r;
-+
-+ /* sampling table */
-+ u8 *sample_table;
-+
-+#ifdef CONFIG_MAC80211_DEBUGFS
-+ struct dentry *dbg_stats;
-+#endif
-+};
-+
-+struct minstrel_priv {
-+ struct ieee80211_hw *hw;
-+ bool has_mrr;
-+ unsigned int cw_min;
-+ unsigned int cw_max;
-+ unsigned int max_retry;
-+ unsigned int ewma_level;
-+ unsigned int segment_size;
-+ unsigned int update_interval;
-+ unsigned int lookaround_rate;
-+ unsigned int lookaround_rate_mrr;
-+};
-+
-+void minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
-+void minstrel_remove_sta_debugfs(void *priv, void *priv_sta);
-+
-+#endif
---- /dev/null
-+++ b/net/mac80211/rc80211_minstrel_debugfs.c
-@@ -0,0 +1,164 @@
-+/*
-+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
-+ *
-+ * 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.
-+ *
-+ * Based on minstrel.c:
-+ * Copyright (C) 2005-2007 Derek Smithies <derek@indranet.co.nz>
-+ * Sponsored by Indranet Technologies Ltd
-+ *
-+ * Based on sample.c:
-+ * Copyright (c) 2005 John Bicket
-+ * All rights reserved.
-+ *
-+ * Redistribution and use in source and binary forms, with or without
-+ * modification, are permitted provided that the following conditions
-+ * are met:
-+ * 1. Redistributions of source code must retain the above copyright
-+ * notice, this list of conditions and the following disclaimer,
-+ * without modification.
-+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
-+ * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
-+ * redistribution must be conditioned upon including a substantially
-+ * similar Disclaimer requirement for further binary redistribution.
-+ * 3. Neither the names of the above-listed copyright holders nor the names
-+ * of any contributors may be used to endorse or promote products derived
-+ * from this software without specific prior written permission.
-+ *
-+ * Alternatively, this software may be distributed under the terms of the
-+ * GNU General Public License ("GPL") version 2 as published by the Free
-+ * Software Foundation.
-+ *
-+ * NO WARRANTY
-+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-+ * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
-+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
-+ * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
-+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
-+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
-+ * THE POSSIBILITY OF SUCH DAMAGES.
-+ */
-+#include <linux/netdevice.h>
-+#include <linux/types.h>
-+#include <linux/skbuff.h>
-+#include <linux/debugfs.h>
-+#include <linux/ieee80211.h>
-+#include <net/mac80211.h>
-+#include "rc80211_minstrel.h"
-+
-+struct minstrel_stats_info {
-+ struct minstrel_sta_info *mi;
-+ char buf[4096];
-+ size_t len;
-+};
-+
-+static int
-+minstrel_stats_open(struct inode *inode, struct file *file)
-+{
-+ struct minstrel_sta_info *mi = inode->i_private;
-+ struct minstrel_stats_info *ms;
-+ unsigned int i, tp, prob, eprob;
-+ char *p;
-+
-+ ms = kmalloc(sizeof(*ms), GFP_KERNEL);
-+ if (!ms)
-+ return -ENOMEM;
-+
-+ file->private_data = ms;
-+ p = ms->buf;
-+ p += sprintf(p, "rate throughput ewma prob this prob "
-+ "this succ/attempt success attempts\n");
-+ for (i = 0; i < mi->n_rates; i++) {
-+ struct minstrel_rate *mr = &mi->r[i];
-+
-+ *(p++) = (i == mi->max_tp_rate) ? 'T' : ' ';
-+ *(p++) = (i == mi->max_tp_rate2) ? 't' : ' ';
-+ *(p++) = (i == mi->max_prob_rate) ? 'P' : ' ';
-+ p += sprintf(p, "%3u%s", mr->bitrate / 2,
-+ (mr->bitrate & 1 ? ".5" : " "));
-+
-+ tp = ((mr->cur_tp * 96) / 18000) >> 10;
-+ prob = mr->cur_prob / 18;
-+ eprob = mr->probability / 18;
-+
-+ p += sprintf(p, " %6u.%1u %6u.%1u %6u.%1u "
-+ "%3u(%3u) %8llu %8llu\n",
-+ tp / 10, tp % 10,
-+ eprob / 10, eprob % 10,
-+ prob / 10, prob % 10,
-+ mr->last_success,
-+ mr->last_attempts,
-+ mr->succ_hist,
-+ mr->att_hist);
-+ }
-+ p += sprintf(p, "\nTotal packet count:: ideal %d "
-+ "lookaround %d\n\n",
-+ mi->packet_count - mi->sample_count,
-+ mi->sample_count);
-+ ms->len = p - ms->buf;
-+
-+ return 0;
-+}
-+
-+static int
-+minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *o)
-+{
-+ struct minstrel_stats_info *ms;
-+ char *src;
-+
-+ ms = file->private_data;
-+ src = ms->buf;
-+
-+ len = min(len, ms->len);
-+ if (len <= *o)
-+ return 0;
-+
-+ src += *o;
-+ len -= *o;
-+ *o += len;
-+
-+ if (copy_to_user(buf, src, len))
-+ return -EFAULT;
-+
-+ return len;
-+}
-+
-+static int
-+minstrel_stats_release(struct inode *inode, struct file *file)
-+{
-+ struct minstrel_stats_info *ms = file->private_data;
-+
-+ kfree(ms);
-+
-+ return 0;
-+}
-+
-+static struct file_operations minstrel_stat_fops = {
-+ .owner = THIS_MODULE,
-+ .open = minstrel_stats_open,
-+ .read = minstrel_stats_read,
-+ .release = minstrel_stats_release,
-+};
-+
-+void
-+minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
-+{
-+ struct minstrel_sta_info *mi = priv_sta;
-+
-+ mi->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, mi,
-+ &minstrel_stat_fops);
-+}
-+
-+void
-+minstrel_remove_sta_debugfs(void *priv, void *priv_sta)
-+{
-+ struct minstrel_sta_info *mi = priv_sta;
-+
-+ debugfs_remove(mi->dbg_stats);
-+}
---- a/net/mac80211/Kconfig
-+++ b/net/mac80211/Kconfig
-@@ -22,6 +22,11 @@
- mac80211 that uses a PID controller to select the TX
- rate.
-
-+config MAC80211_RC_MINSTREL
-+ bool "Minstrel"
-+ ---help---
-+ This option enables the 'minstrel' TX rate control algorithm
-+
- choice
- prompt "Default rate control algorithm"
- default MAC80211_RC_DEFAULT_PID
-@@ -39,11 +44,19 @@
- default rate control algorithm. You should choose
- this unless you know what you are doing.
-
-+config MAC80211_RC_DEFAULT_MINSTREL
-+ bool "Minstrel"
-+ depends on MAC80211_RC_MINSTREL
-+ ---help---
-+ Select Minstrel as the default rate control algorithm.
-+
-+
- endchoice
-
- config MAC80211_RC_DEFAULT
- string
- default "pid" if MAC80211_RC_DEFAULT_PID
-+ default "minstrel" if MAC80211_RC_DEFAULT_MINSTREL
- default ""
-
- endmenu
projects / openwrt / staging / chunkeey.git / commitdiff