.flags = 0 },
};
+/*
+ * Zydas retry rates table. Each line is listed in the same order as
+ * in zd_rates[] and contains all the rate used when a packet is sent
+ * starting with a given rates. Let's consider an example :
+ *
+ * "11 Mbits : 4, 3, 2, 1, 0" means :
+ * - packet is sent using 4 different rates
+ * - 1st rate is index 3 (ie 11 Mbits)
+ * - 2nd rate is index 2 (ie 5.5 Mbits)
+ * - 3rd rate is index 1 (ie 2 Mbits)
+ * - 4th rate is index 0 (ie 1 Mbits)
+ */
+
+static const struct tx_retry_rate zd_retry_rates[] = {
+ { /* 1 Mbits */ 1, { 0 }},
+ { /* 2 Mbits */ 2, { 1, 0 }},
+ { /* 5.5 Mbits */ 3, { 2, 1, 0 }},
+ { /* 11 Mbits */ 4, { 3, 2, 1, 0 }},
+ { /* 6 Mbits */ 5, { 4, 3, 2, 1, 0 }},
+ { /* 9 Mbits */ 6, { 5, 4, 3, 2, 1, 0}},
+ { /* 12 Mbits */ 5, { 6, 3, 2, 1, 0 }},
+ { /* 18 Mbits */ 6, { 7, 6, 3, 2, 1, 0 }},
+ { /* 24 Mbits */ 6, { 8, 6, 3, 2, 1, 0 }},
+ { /* 36 Mbits */ 7, { 9, 8, 6, 3, 2, 1, 0 }},
+ { /* 48 Mbits */ 8, {10, 9, 8, 6, 3, 2, 1, 0 }},
+ { /* 54 Mbits */ 9, {11, 10, 9, 8, 6, 3, 2, 1, 0 }}
+};
+
static const struct ieee80211_channel zd_channels[] = {
{ .center_freq = 2412, .hw_value = 1 },
{ .center_freq = 2417, .hw_value = 2 },
}
/**
- * tx_status - reports tx status of a packet if required
+ * zd_mac_tx_status - reports tx status of a packet if required
* @hw - a &struct ieee80211_hw pointer
* @skb - a sk-buffer
* @flags: extra flags to set in the TX status info
*
* If no status information has been requested, the skb is freed.
*/
-static void tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
- int ackssi, bool success)
+static void zd_mac_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
+ int ackssi, struct tx_status *tx_status)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ int i;
+ int success = 1, retry = 1;
+ int first_idx;
+ const struct tx_retry_rate *retries;
ieee80211_tx_info_clear_status(info);
- if (success)
+ if (tx_status) {
+ success = !tx_status->failure;
+ retry = tx_status->retry + success;
+ }
+
+ if (success) {
+ /* success */
info->flags |= IEEE80211_TX_STAT_ACK;
+ } else {
+ /* failure */
+ info->flags &= ~IEEE80211_TX_STAT_ACK;
+ }
+
+ first_idx = info->status.rates[0].idx;
+ ZD_ASSERT(0<=first_idx && first_idx<ARRAY_SIZE(zd_retry_rates));
+ retries = &zd_retry_rates[first_idx];
+ ZD_ASSERT(0<=retry && retry<=retries->count);
+
+ info->status.rates[0].idx = retries->rate[0];
+ info->status.rates[0].count = 1; // (retry > 1 ? 2 : 1);
+
+ for (i=1; i<IEEE80211_TX_MAX_RATES-1 && i<retry; i++) {
+ info->status.rates[i].idx = retries->rate[i];
+ info->status.rates[i].count = 1; // ((i==retry-1) && success ? 1:2);
+ }
+ for (; i<IEEE80211_TX_MAX_RATES && i<retry; i++) {
+ info->status.rates[i].idx = retries->rate[retry-1];
+ info->status.rates[i].count = 1; // (success ? 1:2);
+ }
+ if (i<IEEE80211_TX_MAX_RATES)
+ info->status.rates[i].idx = -1; /* terminate */
+
info->status.ack_signal = ackssi;
ieee80211_tx_status_irqsafe(hw, skb);
}
* transferred. The first frame from the tx queue, will be selected and
* reported as error to the upper layers.
*/
-void zd_mac_tx_failed(struct ieee80211_hw *hw)
+void zd_mac_tx_failed(struct urb *urb)
{
- struct sk_buff_head *q = &zd_hw_mac(hw)->ack_wait_queue;
+ struct ieee80211_hw * hw = zd_usb_to_hw(urb->context);
+ struct zd_mac *mac = zd_hw_mac(hw);
+ struct sk_buff_head *q = &mac->ack_wait_queue;
struct sk_buff *skb;
+ struct tx_status *tx_status = (struct tx_status *)urb->transfer_buffer;
+ unsigned long flags;
+ int success = !tx_status->failure;
+ int retry = tx_status->retry + success;
+ int found = 0;
+ int i, position = 0;
- skb = skb_dequeue(q);
- if (skb == NULL)
- return;
+ q = &mac->ack_wait_queue;
+ spin_lock_irqsave(&q->lock, flags);
+
+ skb_queue_walk(q, skb) {
+ struct ieee80211_hdr *tx_hdr;
+ struct ieee80211_tx_info *info;
+ int first_idx, final_idx;
+ const struct tx_retry_rate *retries;
+ u8 final_rate;
+
+ position ++;
+
+ /* if the hardware reports a failure and we had a 802.11 ACK
+ * pending, then we skip the first skb when searching for a
+ * matching frame */
+ if (tx_status->failure && mac->ack_pending &&
+ skb_queue_is_first(q, skb)) {
+ continue;
+ }
+
+ tx_hdr = (struct ieee80211_hdr *)skb->data;
+
+ /* we skip all frames not matching the reported destination */
+ if (unlikely(memcmp(tx_hdr->addr1, tx_status->mac, ETH_ALEN))) {
+ continue;
+ }
+
+ /* we skip all frames not matching the reported final rate */
- tx_status(hw, skb, 0, 0);
+ info = IEEE80211_SKB_CB(skb);
+ first_idx = info->status.rates[0].idx;
+ ZD_ASSERT(0<=first_idx && first_idx<ARRAY_SIZE(zd_retry_rates));
+ retries = &zd_retry_rates[first_idx];
+ if (retry < 0 || retry > retries->count) {
+ continue;
+ }
+
+ ZD_ASSERT(0<=retry && retry<=retries->count);
+ final_idx = retries->rate[retry-1];
+ final_rate = zd_rates[final_idx].hw_value;
+
+ if (final_rate != tx_status->rate) {
+ continue;
+ }
+
+ found = 1;
+ break;
+ }
+
+ if (found) {
+ for (i=1; i<=position; i++) {
+ skb = __skb_dequeue(q);
+ zd_mac_tx_status(hw, skb,
+ mac->ack_pending ? mac->ack_signal : 0,
+ i == position ? tx_status : NULL);
+ mac->ack_pending = 0;
+ }
+ }
+
+ spin_unlock_irqrestore(&q->lock, flags);
}
/**
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_hw *hw = info->rate_driver_data[0];
+ struct zd_mac *mac = zd_hw_mac(hw);
+
+ ieee80211_tx_info_clear_status(info);
skb_pull(skb, sizeof(struct zd_ctrlset));
if (unlikely(error ||
(info->flags & IEEE80211_TX_CTL_NO_ACK))) {
- tx_status(hw, skb, 0, !error);
+ /*
+ * FIXME : do we need to fill in anything ?
+ */
+ ieee80211_tx_status_irqsafe(hw, skb);
} else {
- struct sk_buff_head *q =
- &zd_hw_mac(hw)->ack_wait_queue;
+ struct sk_buff_head *q = &mac->ack_wait_queue;
skb_queue_tail(q, skb);
- while (skb_queue_len(q) > ZD_MAC_MAX_ACK_WAITERS)
- zd_mac_tx_failed(hw);
+ while (skb_queue_len(q) > ZD_MAC_MAX_ACK_WAITERS) {
+ zd_mac_tx_status(hw, skb_dequeue(q),
+ mac->ack_pending ? mac->ack_signal : 0,
+ NULL);
+ mac->ack_pending = 0;
+ }
}
}
static int filter_ack(struct ieee80211_hw *hw, struct ieee80211_hdr *rx_hdr,
struct ieee80211_rx_status *stats)
{
+ struct zd_mac *mac = zd_hw_mac(hw);
struct sk_buff *skb;
struct sk_buff_head *q;
unsigned long flags;
+ int found = 0;
+ int i, position = 0;
if (!ieee80211_is_ack(rx_hdr->frame_control))
return 0;
- q = &zd_hw_mac(hw)->ack_wait_queue;
+ q = &mac->ack_wait_queue;
spin_lock_irqsave(&q->lock, flags);
skb_queue_walk(q, skb) {
struct ieee80211_hdr *tx_hdr;
+ position ++;
+
+ if (mac->ack_pending && skb_queue_is_first(q, skb))
+ continue;
+
tx_hdr = (struct ieee80211_hdr *)skb->data;
if (likely(!memcmp(tx_hdr->addr2, rx_hdr->addr1, ETH_ALEN)))
{
- __skb_unlink(skb, q);
- tx_status(hw, skb, stats->signal, 1);
- goto out;
+ found = 1;
+ break;
}
}
-out:
+
+ if (found) {
+ for (i=1; i<position; i++) {
+ skb = __skb_dequeue(q);
+ zd_mac_tx_status(hw, skb,
+ mac->ack_pending ? mac->ack_signal : 0,
+ NULL);
+ mac->ack_pending = 0;
+ }
+
+ mac->ack_pending = 1;
+ mac->ack_signal = stats->signal;
+ }
+
spin_unlock_irqrestore(&q->lock, flags);
return 1;
}
skb_reserve(skb, 2);
}
+ /* FIXME : could we avoid this big memcpy ? */
memcpy(skb_put(skb, length), buffer, length);
memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats));
hw->queues = 1;
hw->extra_tx_headroom = sizeof(struct zd_ctrlset);
+ /*
+ * Tell mac80211 that we support multi rate retries
+ */
+ hw->max_rates = IEEE80211_TX_MAX_RATES;
+ hw->max_rate_tries = 18; /* 9 rates * 2 retries/rate */
+
skb_queue_head_init(&mac->ack_wait_queue);
+ mac->ack_pending = 0;
zd_chip_init(&mac->chip, hw, intf);
housekeeping_init(mac);
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff