diff options
Diffstat (limited to 'drivers/net/wireless/rt2x00/rt2x00usb.c')
-rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00usb.c | 288 |
1 files changed, 125 insertions, 163 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c index e5ceae805b5..3080969ae5b 100644 --- a/drivers/net/wireless/rt2x00/rt2x00usb.c +++ b/drivers/net/wireless/rt2x00/rt2x00usb.c @@ -129,17 +129,13 @@ static void rt2x00usb_interrupt_txdone(struct urb *urb) { struct queue_entry *entry = (struct queue_entry *)urb->context; struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; - struct queue_entry_priv_usb_tx *priv_tx = entry->priv_data; struct txdone_entry_desc txdesc; - __le32 *txd = (__le32 *)entry->skb->data; - u32 word; + enum data_queue_qid qid = skb_get_queue_mapping(entry->skb); if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) || !__test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) return; - rt2x00_desc_read(txd, 0, &word); - /* * Remove the descriptor data from the buffer. */ @@ -147,10 +143,18 @@ static void rt2x00usb_interrupt_txdone(struct urb *urb) /* * Obtain the status about this packet. + * Note that when the status is 0 it does not mean the + * frame was send out correctly. It only means the frame + * was succesfully pushed to the hardware, we have no + * way to determine the transmission status right now. + * (Only indirectly by looking at the failed TX counters + * in the register). */ - txdesc.status = !urb->status ? TX_SUCCESS : TX_FAIL_RETRY; + if (!urb->status) + __set_bit(TXDONE_UNKNOWN, &txdesc.flags); + else + __set_bit(TXDONE_FAILURE, &txdesc.flags); txdesc.retry = 0; - txdesc.control = &priv_tx->control; rt2x00lib_txdone(entry, &txdesc); @@ -161,103 +165,101 @@ static void rt2x00usb_interrupt_txdone(struct urb *urb) rt2x00queue_index_inc(entry->queue, Q_INDEX_DONE); /* - * If the data queue was full before the txdone handler - * we must make sure the packet queue in the mac80211 stack + * If the data queue was below the threshold before the txdone + * handler we must make sure the packet queue in the mac80211 stack * is reenabled when the txdone handler has finished. */ - if (!rt2x00queue_full(entry->queue)) - ieee80211_wake_queue(rt2x00dev->hw, priv_tx->control.queue); + if (!rt2x00queue_threshold(entry->queue)) + ieee80211_wake_queue(rt2x00dev->hw, qid); } -int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev, - struct data_queue *queue, struct sk_buff *skb, - struct ieee80211_tx_control *control) +int rt2x00usb_write_tx_data(struct queue_entry *entry) { + struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; struct usb_device *usb_dev = rt2x00dev_usb_dev(rt2x00dev); - struct queue_entry *entry = rt2x00queue_get_entry(queue, Q_INDEX); - struct queue_entry_priv_usb_tx *priv_tx = entry->priv_data; + struct queue_entry_priv_usb *entry_priv = entry->priv_data; struct skb_frame_desc *skbdesc; u32 length; - if (rt2x00queue_full(queue)) - return -EINVAL; - - if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) { - ERROR(rt2x00dev, - "Arrived at non-free entry in the non-full queue %d.\n" - "Please file bug report to %s.\n", - control->queue, DRV_PROJECT); - return -EINVAL; - } - /* * Add the descriptor in front of the skb. */ - skb_push(skb, queue->desc_size); - memset(skb->data, 0, queue->desc_size); + skb_push(entry->skb, entry->queue->desc_size); + memset(entry->skb->data, 0, entry->queue->desc_size); /* * Fill in skb descriptor */ - skbdesc = get_skb_frame_desc(skb); - skbdesc->data = skb->data + queue->desc_size; - skbdesc->data_len = skb->len - queue->desc_size; - skbdesc->desc = skb->data; - skbdesc->desc_len = queue->desc_size; + skbdesc = get_skb_frame_desc(entry->skb); + memset(skbdesc, 0, sizeof(*skbdesc)); + skbdesc->desc = entry->skb->data; + skbdesc->desc_len = entry->queue->desc_size; skbdesc->entry = entry; - memcpy(&priv_tx->control, control, sizeof(priv_tx->control)); - rt2x00lib_write_tx_desc(rt2x00dev, skb, control); - /* * USB devices cannot blindly pass the skb->len as the * length of the data to usb_fill_bulk_urb. Pass the skb * to the driver to determine what the length should be. */ - length = rt2x00dev->ops->lib->get_tx_data_len(rt2x00dev, skb); + length = rt2x00dev->ops->lib->get_tx_data_len(rt2x00dev, entry->skb); - /* - * Initialize URB and send the frame to the device. - */ - __set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); - usb_fill_bulk_urb(priv_tx->urb, usb_dev, usb_sndbulkpipe(usb_dev, 1), - skb->data, length, rt2x00usb_interrupt_txdone, entry); - usb_submit_urb(priv_tx->urb, GFP_ATOMIC); - - rt2x00queue_index_inc(queue, Q_INDEX); + usb_fill_bulk_urb(entry_priv->urb, usb_dev, + usb_sndbulkpipe(usb_dev, 1), + entry->skb->data, length, + rt2x00usb_interrupt_txdone, entry); return 0; } EXPORT_SYMBOL_GPL(rt2x00usb_write_tx_data); -/* - * RX data handlers. - */ -static struct sk_buff* rt2x00usb_alloc_rxskb(struct data_queue *queue) +static inline void rt2x00usb_kick_tx_entry(struct queue_entry *entry) { - struct sk_buff *skb; - unsigned int frame_size; + struct queue_entry_priv_usb *entry_priv = entry->priv_data; + + if (__test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags)) + usb_submit_urb(entry_priv->urb, GFP_ATOMIC); +} + +void rt2x00usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev, + const enum data_queue_qid qid) +{ + struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, qid); + unsigned long irqflags; + unsigned int index; + unsigned int index_done; + unsigned int i; /* - * As alignment we use 2 and not NET_IP_ALIGN because we need - * to be sure we have 2 bytes room in the head. (NET_IP_ALIGN - * can be 0 on some hardware). We use these 2 bytes for frame - * alignment later, we assume that the chance that - * header_size % 4 == 2 is bigger then header_size % 2 == 0 - * and thus optimize alignment by reserving the 2 bytes in - * advance. + * Only protect the range we are going to loop over, + * if during our loop a extra entry is set to pending + * it should not be kicked during this run, since it + * is part of another TX operation. */ - frame_size = queue->data_size + queue->desc_size; - skb = dev_alloc_skb(queue->desc_size + frame_size + 2); - if (!skb) - return NULL; - - skb_reserve(skb, queue->desc_size + 2); - skb_put(skb, frame_size); + spin_lock_irqsave(&queue->lock, irqflags); + index = queue->index[Q_INDEX]; + index_done = queue->index[Q_INDEX_DONE]; + spin_unlock_irqrestore(&queue->lock, irqflags); - return skb; + /* + * Start from the TX done pointer, this guarentees that we will + * send out all frames in the correct order. + */ + if (index_done < index) { + for (i = index_done; i < index; i++) + rt2x00usb_kick_tx_entry(&queue->entries[i]); + } else { + for (i = index_done; i < queue->limit; i++) + rt2x00usb_kick_tx_entry(&queue->entries[i]); + + for (i = 0; i < index; i++) + rt2x00usb_kick_tx_entry(&queue->entries[i]); + } } +EXPORT_SYMBOL_GPL(rt2x00usb_kick_tx_queue); +/* + * RX data handlers. + */ static void rt2x00usb_interrupt_rxdone(struct urb *urb) { struct queue_entry *entry = (struct queue_entry *)urb->context; @@ -265,7 +267,7 @@ static void rt2x00usb_interrupt_rxdone(struct urb *urb) struct sk_buff *skb; struct skb_frame_desc *skbdesc; struct rxdone_entry_desc rxdesc; - int header_size; + u8 rxd[32]; if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) || !test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) @@ -285,29 +287,18 @@ static void rt2x00usb_interrupt_rxdone(struct urb *urb) skbdesc = get_skb_frame_desc(entry->skb); memset(skbdesc, 0, sizeof(*skbdesc)); skbdesc->entry = entry; + skbdesc->desc = rxd; + skbdesc->desc_len = entry->queue->desc_size; memset(&rxdesc, 0, sizeof(rxdesc)); rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc); /* - * The data behind the ieee80211 header must be - * aligned on a 4 byte boundary. - */ - header_size = ieee80211_get_hdrlen_from_skb(entry->skb); - if (header_size % 4 == 0) { - skb_push(entry->skb, 2); - memmove(entry->skb->data, entry->skb->data + 2, - entry->skb->len - 2); - skbdesc->data = entry->skb->data; - skb_trim(entry->skb,entry->skb->len - 2); - } - - /* * Allocate a new sk buffer to replace the current one. * If allocation fails, we should drop the current frame * so we can recycle the existing sk buffer for the new frame. */ - skb = rt2x00usb_alloc_rxskb(entry->queue); + skb = rt2x00queue_alloc_rxskb(entry->queue); if (!skb) goto skip_entry; @@ -338,28 +329,19 @@ skip_entry: */ void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev) { - struct queue_entry_priv_usb_rx *priv_rx; - struct queue_entry_priv_usb_tx *priv_tx; - struct queue_entry_priv_usb_bcn *priv_bcn; - struct data_queue *queue; + struct queue_entry_priv_usb *entry_priv; + struct queue_entry_priv_usb_bcn *bcn_priv; unsigned int i; - rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0x0000, 0x0000, + rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0, REGISTER_TIMEOUT); /* * Cancel all queues. */ for (i = 0; i < rt2x00dev->rx->limit; i++) { - priv_rx = rt2x00dev->rx->entries[i].priv_data; - usb_kill_urb(priv_rx->urb); - } - - tx_queue_for_each(rt2x00dev, queue) { - for (i = 0; i < queue->limit; i++) { - priv_tx = queue->entries[i].priv_data; - usb_kill_urb(priv_tx->urb); - } + entry_priv = rt2x00dev->rx->entries[i].priv_data; + usb_kill_urb(entry_priv->urb); } /* @@ -369,19 +351,9 @@ void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev) return; for (i = 0; i < rt2x00dev->bcn->limit; i++) { - priv_bcn = rt2x00dev->bcn->entries[i].priv_data; - usb_kill_urb(priv_bcn->urb); - - if (priv_bcn->guardian_urb) - usb_kill_urb(priv_bcn->guardian_urb); - } - - if (!test_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags)) - return; - - for (i = 0; i < rt2x00dev->bcn[1].limit; i++) { - priv_tx = rt2x00dev->bcn[1].entries[i].priv_data; - usb_kill_urb(priv_tx->urb); + bcn_priv = rt2x00dev->bcn->entries[i].priv_data; + if (bcn_priv->guardian_urb) + usb_kill_urb(bcn_priv->guardian_urb); } } EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio); @@ -393,15 +365,15 @@ void rt2x00usb_init_rxentry(struct rt2x00_dev *rt2x00dev, struct queue_entry *entry) { struct usb_device *usb_dev = rt2x00dev_usb_dev(rt2x00dev); - struct queue_entry_priv_usb_rx *priv_rx = entry->priv_data; + struct queue_entry_priv_usb *entry_priv = entry->priv_data; - usb_fill_bulk_urb(priv_rx->urb, usb_dev, + usb_fill_bulk_urb(entry_priv->urb, usb_dev, usb_rcvbulkpipe(usb_dev, 1), entry->skb->data, entry->skb->len, rt2x00usb_interrupt_rxdone, entry); __set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); - usb_submit_urb(priv_rx->urb, GFP_ATOMIC); + usb_submit_urb(entry_priv->urb, GFP_ATOMIC); } EXPORT_SYMBOL_GPL(rt2x00usb_init_rxentry); @@ -415,38 +387,31 @@ EXPORT_SYMBOL_GPL(rt2x00usb_init_txentry); static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev, struct data_queue *queue) { - struct queue_entry_priv_usb_rx *priv_rx; - struct queue_entry_priv_usb_tx *priv_tx; - struct queue_entry_priv_usb_bcn *priv_bcn; - struct urb *urb; - unsigned int guardian = - test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags); + struct queue_entry_priv_usb *entry_priv; + struct queue_entry_priv_usb_bcn *bcn_priv; unsigned int i; + for (i = 0; i < queue->limit; i++) { + entry_priv = queue->entries[i].priv_data; + entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL); + if (!entry_priv->urb) + return -ENOMEM; + } + /* - * Allocate the URB's + * If this is not the beacon queue or + * no guardian byte was required for the beacon, + * then we are done. */ + if (rt2x00dev->bcn != queue || + !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) + return 0; + for (i = 0; i < queue->limit; i++) { - urb = usb_alloc_urb(0, GFP_KERNEL); - if (!urb) + bcn_priv = queue->entries[i].priv_data; + bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL); + if (!bcn_priv->guardian_urb) return -ENOMEM; - - if (queue->qid == QID_RX) { - priv_rx = queue->entries[i].priv_data; - priv_rx->urb = urb; - } else if (queue->qid == QID_MGMT && guardian) { - priv_bcn = queue->entries[i].priv_data; - priv_bcn->urb = urb; - - urb = usb_alloc_urb(0, GFP_KERNEL); - if (!urb) - return -ENOMEM; - - priv_bcn->guardian_urb = urb; - } else { - priv_tx = queue->entries[i].priv_data; - priv_tx->urb = urb; - } } return 0; @@ -455,38 +420,35 @@ static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev, static void rt2x00usb_free_urb(struct rt2x00_dev *rt2x00dev, struct data_queue *queue) { - struct queue_entry_priv_usb_rx *priv_rx; - struct queue_entry_priv_usb_tx *priv_tx; - struct queue_entry_priv_usb_bcn *priv_bcn; - struct urb *urb; - unsigned int guardian = - test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags); + struct queue_entry_priv_usb *entry_priv; + struct queue_entry_priv_usb_bcn *bcn_priv; unsigned int i; if (!queue->entries) return; for (i = 0; i < queue->limit; i++) { - if (queue->qid == QID_RX) { - priv_rx = queue->entries[i].priv_data; - urb = priv_rx->urb; - } else if (queue->qid == QID_MGMT && guardian) { - priv_bcn = queue->entries[i].priv_data; - - usb_kill_urb(priv_bcn->guardian_urb); - usb_free_urb(priv_bcn->guardian_urb); - - urb = priv_bcn->urb; - } else { - priv_tx = queue->entries[i].priv_data; - urb = priv_tx->urb; - } - - usb_kill_urb(urb); - usb_free_urb(urb); + entry_priv = queue->entries[i].priv_data; + usb_kill_urb(entry_priv->urb); + usb_free_urb(entry_priv->urb); if (queue->entries[i].skb) kfree_skb(queue->entries[i].skb); } + + /* + * If this is not the beacon queue or + * no guardian byte was required for the beacon, + * then we are done. + */ + if (rt2x00dev->bcn != queue || + !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) + return; + + for (i = 0; i < queue->limit; i++) { + bcn_priv = queue->entries[i].priv_data; + usb_kill_urb(bcn_priv->guardian_urb); + usb_free_urb(bcn_priv->guardian_urb); + } } int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev) @@ -511,7 +473,7 @@ int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev) */ entry_size = rt2x00dev->rx->data_size + rt2x00dev->rx->desc_size; for (i = 0; i < rt2x00dev->rx->limit; i++) { - skb = rt2x00usb_alloc_rxskb(rt2x00dev->rx); + skb = rt2x00queue_alloc_rxskb(rt2x00dev->rx); if (!skb) goto exit; |