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path: root/drivers/net/wireless/rt2x00/rt2x00queue.c
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Diffstat (limited to 'drivers/net/wireless/rt2x00/rt2x00queue.c')
-rw-r--r--drivers/net/wireless/rt2x00/rt2x00queue.c167
1 files changed, 163 insertions, 4 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2x00queue.c b/drivers/net/wireless/rt2x00/rt2x00queue.c
index e5b861f8416d..e69ef4b19239 100644
--- a/drivers/net/wireless/rt2x00/rt2x00queue.c
+++ b/drivers/net/wireless/rt2x00/rt2x00queue.c
@@ -29,12 +29,171 @@
#include "rt2x00.h"
#include "rt2x00lib.h"
+void rt2x00queue_create_tx_descriptor(struct queue_entry *entry,
+ struct txentry_desc *txdesc)
+{
+ struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
+ struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)entry->skb->data;
+ struct ieee80211_rate *rate =
+ ieee80211_get_tx_rate(rt2x00dev->hw, tx_info);
+ const struct rt2x00_rate *hwrate;
+ unsigned int data_length;
+ unsigned int duration;
+ unsigned int residual;
+ u16 frame_control;
+
+ memset(txdesc, 0, sizeof(*txdesc));
+
+ /*
+ * Initialize information from queue
+ */
+ txdesc->queue = entry->queue->qid;
+ txdesc->cw_min = entry->queue->cw_min;
+ txdesc->cw_max = entry->queue->cw_max;
+ txdesc->aifs = entry->queue->aifs;
+
+ /* Data length should be extended with 4 bytes for CRC */
+ data_length = entry->skb->len + 4;
+
+ /*
+ * Read required fields from ieee80211 header.
+ */
+ frame_control = le16_to_cpu(hdr->frame_control);
+
+ /*
+ * Check whether this frame is to be acked.
+ */
+ if (!(tx_info->flags & IEEE80211_TX_CTL_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);
+ else
+ __set_bit(ENTRY_TXD_CTS_FRAME, &txdesc->flags);
+ if (tx_info->control.rts_cts_rate_idx >= 0)
+ rate =
+ ieee80211_get_rts_cts_rate(rt2x00dev->hw, tx_info);
+ }
+
+ /*
+ * Determine retry information.
+ */
+ txdesc->retry_limit = tx_info->control.retry_limit;
+ if (tx_info->flags & IEEE80211_TX_CTL_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 (tx_info->flags & IEEE80211_TX_CTL_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.
+ */
+ hwrate = rt2x00_get_rate(rate->hw_value);
+ txdesc->signal = hwrate->plcp;
+ txdesc->service = 0x04;
+
+ if (hwrate->flags & DEV_RATE_OFDM) {
+ __set_bit(ENTRY_TXD_OFDM_RATE, &txdesc->flags);
+
+ txdesc->length_high = (data_length >> 6) & 0x3f;
+ txdesc->length_low = data_length & 0x3f;
+ } else {
+ /*
+ * Convert length to microseconds.
+ */
+ residual = get_duration_res(data_length, hwrate->bitrate);
+ duration = get_duration(data_length, hwrate->bitrate);
+
+ if (residual != 0) {
+ duration++;
+
+ /*
+ * Check if we need to set the Length Extension
+ */
+ if (hwrate->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(rate->hw_value))
+ txdesc->signal |= 0x08;
+ }
+}
+EXPORT_SYMBOL_GPL(rt2x00queue_create_tx_descriptor);
+
+void rt2x00queue_write_tx_descriptor(struct queue_entry *entry,
+ struct txentry_desc *txdesc)
+{
+ struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
+ struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
+
+ rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, entry->skb, txdesc);
+
+ /*
+ * All processing on the frame has been completed, this means
+ * it is now ready to be dumped to userspace through debugfs.
+ */
+ rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TX, entry->skb);
+
+ /*
+ * We are done writing the frame to the queue entry,
+ * also kick the queue in case the correct flags are set,
+ * note that this will automatically filter beacons and
+ * RTS/CTS frames since those frames don't have this flag
+ * set.
+ */
+ if (rt2x00dev->ops->lib->kick_tx_queue &&
+ !(skbdesc->flags & FRAME_DESC_DRIVER_GENERATED))
+ rt2x00dev->ops->lib->kick_tx_queue(rt2x00dev,
+ entry->queue->qid);
+}
+EXPORT_SYMBOL_GPL(rt2x00queue_write_tx_descriptor);
+
struct data_queue *rt2x00queue_get_queue(struct rt2x00_dev *rt2x00dev,
const enum data_queue_qid queue)
{
int atim = test_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags);
- if (queue < rt2x00dev->hw->queues && rt2x00dev->tx)
+ if (queue < rt2x00dev->ops->tx_queues && rt2x00dev->tx)
return &rt2x00dev->tx[queue];
if (!rt2x00dev->bcn)
@@ -255,11 +414,11 @@ int rt2x00queue_allocate(struct rt2x00_dev *rt2x00dev)
/*
* We need the following queues:
* RX: 1
- * TX: hw->queues
+ * TX: ops->tx_queues
* Beacon: 1
* Atim: 1 (if required)
*/
- rt2x00dev->data_queues = 2 + rt2x00dev->hw->queues + req_atim;
+ rt2x00dev->data_queues = 2 + rt2x00dev->ops->tx_queues + req_atim;
queue = kzalloc(rt2x00dev->data_queues * sizeof(*queue), GFP_KERNEL);
if (!queue) {
@@ -272,7 +431,7 @@ int rt2x00queue_allocate(struct rt2x00_dev *rt2x00dev)
*/
rt2x00dev->rx = queue;
rt2x00dev->tx = &queue[1];
- rt2x00dev->bcn = &queue[1 + rt2x00dev->hw->queues];
+ rt2x00dev->bcn = &queue[1 + rt2x00dev->ops->tx_queues];
/*
* Initialize queue parameters.