rt2x00: Split rt2x00lib_write_tx_desc()

Split rt2x00lib_write_tx_desc() up into a TX descriptor initializor
and TX descriptor writer.

This split is required to properly allow mac80211 to move its
tx_control structure into the skb->cb array.
The rt2x00queue_create_tx_descriptor() function will read all tx control
information and convert it into a rt2x00 TX descriptor information structure.
After that function is complete, we have all information we needed from the
tx control structure and are free to start writing into the skb->cb array
for our own purposes.
rt2x00queue_write_tx_descriptor() will be in charge of really sending
the TX descriptor to the hardware and kicking the TX queue.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 0 insertions, 148 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c b/drivers/net/wireless/rt2x00/rt2x00dev.c
index 46c377873f1..171f445962d 100644
--- a/drivers/net/wireless/rt2x00/rt2x00dev.c
+++ b/drivers/net/wireless/rt2x00/rt2x00dev.c
@@ -612,154 +612,6 @@ void rt2x00lib_rxdone(struct queue_entry *entry,
 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
 
 /*
- * TX descriptor initializer
- */
-void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
-			     struct sk_buff *skb,
-			     struct ieee80211_tx_control *control)
-{
-	struct txentry_desc txdesc;
-	struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skbdesc->data;
-	const struct rt2x00_rate *rate;
-	int tx_rate;
-	int length;
-	int duration;
-	int residual;
-	u16 frame_control;
-	u16 seq_ctrl;
-
-	memset(&txdesc, 0, sizeof(txdesc));
-
-	txdesc.queue = skbdesc->entry->queue->qid;
-	txdesc.cw_min = skbdesc->entry->queue->cw_min;
-	txdesc.cw_max = skbdesc->entry->queue->cw_max;
-	txdesc.aifs = skbdesc->entry->queue->aifs;
-
-	/*
-	 * Read required fields from ieee80211 header.
-	 */
-	frame_control = le16_to_cpu(hdr->frame_control);
-	seq_ctrl = le16_to_cpu(hdr->seq_ctrl);
-
-	tx_rate = control->tx_rate->hw_value;
-
-	/*
-	 * Check whether this frame is to be acked
-	 */
-	if (!(control->flags & IEEE80211_TXCTL_NO_ACK))
-		__set_bit(ENTRY_TXD_ACK, &txdesc.flags);
-
-	/*
-	 * Check if this is a RTS/CTS frame
-	 */
-	if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) {
-		__set_bit(ENTRY_TXD_BURST, &txdesc.flags);
-		if (is_rts_frame(frame_control)) {
-			__set_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags);
-			__set_bit(ENTRY_TXD_ACK, &txdesc.flags);
-		} else
-			__clear_bit(ENTRY_TXD_ACK, &txdesc.flags);
-		if (control->rts_cts_rate)
-			tx_rate = control->rts_cts_rate->hw_value;
-	}
-
-	/*
-	 * Determine retry information.
-	 */
-	txdesc.retry_limit = control->retry_limit;
-	if (control->flags & IEEE80211_TXCTL_LONG_RETRY_LIMIT)
-		__set_bit(ENTRY_TXD_RETRY_MODE, &txdesc.flags);
-
-	/*
-	 * Check if more fragments are pending
-	 */
-	if (ieee80211_get_morefrag(hdr)) {
-		__set_bit(ENTRY_TXD_BURST, &txdesc.flags);
-		__set_bit(ENTRY_TXD_MORE_FRAG, &txdesc.flags);
-	}
-
-	/*
-	 * Beacons and probe responses require the tsf timestamp
-	 * to be inserted into the frame.
-	 */
-	if (txdesc.queue == QID_BEACON || is_probe_resp(frame_control))
-		__set_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc.flags);
-
-	/*
-	 * Determine with what IFS priority this frame should be send.
-	 * Set ifs to IFS_SIFS when the this is not the first fragment,
-	 * or this fragment came after RTS/CTS.
-	 */
-	if (test_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags)) {
-		txdesc.ifs = IFS_SIFS;
-	} else if (control->flags & IEEE80211_TXCTL_FIRST_FRAGMENT) {
-		__set_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc.flags);
-		txdesc.ifs = IFS_BACKOFF;
-	} else {
-		txdesc.ifs = IFS_SIFS;
-	}
-
-	/*
-	 * PLCP setup
-	 * Length calculation depends on OFDM/CCK rate.
-	 */
-	rate = rt2x00_get_rate(tx_rate);
-	txdesc.signal = rate->plcp;
-	txdesc.service = 0x04;
-
-	length = skbdesc->data_len + FCS_LEN;
-	if (rate->flags & DEV_RATE_OFDM) {
-		__set_bit(ENTRY_TXD_OFDM_RATE, &txdesc.flags);
-
-		txdesc.length_high = (length >> 6) & 0x3f;
-		txdesc.length_low = length & 0x3f;
-	} else {
-		/*
-		 * Convert length to microseconds.
-		 */
-		residual = get_duration_res(length, rate->bitrate);
-		duration = get_duration(length, rate->bitrate);
-
-		if (residual != 0) {
-			duration++;
-
-			/*
-			 * Check if we need to set the Length Extension
-			 */
-			if (rate->bitrate == 110 && residual <= 30)
-				txdesc.service |= 0x80;
-		}
-
-		txdesc.length_high = (duration >> 8) & 0xff;
-		txdesc.length_low = duration & 0xff;
-
-		/*
-		 * When preamble is enabled we should set the
-		 * preamble bit for the signal.
-		 */
-		if (rt2x00_get_rate_preamble(tx_rate))
-			txdesc.signal |= 0x08;
-	}
-
-	rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, skb, &txdesc);
-
-	/*
-	 * Update queue entry.
-	 */
-	skbdesc->entry->skb = skb;
-
-	/*
-	 * The frame has been completely initialized and ready
-	 * for sending to the device. The caller will push the
-	 * frame to the device, but we are going to push the
-	 * frame to debugfs here.
-	 */
-	rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TX, skb);
-}
-EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc);
-
-/*
  * Driver initialization handlers.
  */
 const struct rt2x00_rate rt2x00_supported_rates[12] = {