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[PATCH] rt2x00: Add get_tx_data_len callback function

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The TX datalen must always be converted to a value rt73 and rt2500usb
understand. Both require to use a different size then skb->len.
First off this is required because the descriptor must be added,
but the second is because the value must be a multiple of either 2 or 4,
and it should not be a multiple of the USB packetmax

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Ivo van Doorn 2007-10-06 14:15:46 +02:00 committed by David S. Miller
parent 9ee8f57e0a
commit dd9fa2d21a
4 changed files with 56 additions and 23 deletions
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32
drivers/net/wireless/rt2x00/rt2500usb.c
View File

@ -1057,6 +1057,21 @@ static void rt2500usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
rt2x00_desc_write(txd, 0, word);
}
static int rt2500usb_get_tx_data_len(struct rt2x00_dev *rt2x00dev,
int maxpacket, struct sk_buff *skb)
{
int length;
/*
* The length _must_ be a multiple of 2,
* but it must _not_ be a multiple of the USB packet size.
*/
length = roundup(skb->len, 2);
length += (2 * !(length % maxpacket));
return length;
}
/*
* TX data initialization
*/
@ -1653,6 +1668,8 @@ static int rt2500usb_beacon_update(struct ieee80211_hw *hw,
rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_BEACON);
struct data_entry *beacon;
struct data_entry *guardian;
int pipe = usb_sndbulkpipe(usb_dev, 1);
int max_packet = usb_maxpacket(usb_dev, pipe, 1);
int length;
/*
@ -1679,16 +1696,9 @@ static int rt2500usb_beacon_update(struct ieee80211_hw *hw,
ring->desc_size),
skb->len - ring->desc_size, control);
/*
* Length passed to usb_fill_urb cannot be an odd number,
* so add 1 byte to make it even.
*/
length = skb->len;
if (length % 2)
length++;
length = rt2500usb_get_tx_data_len(rt2x00dev, max_packet, skb);
usb_fill_bulk_urb(beacon->priv, usb_dev,
usb_sndbulkpipe(usb_dev, 1),
usb_fill_bulk_urb(beacon->priv, usb_dev, pipe,
skb->data, length, rt2500usb_beacondone, beacon);
beacon->skb = skb;
@ -1699,8 +1709,7 @@ static int rt2500usb_beacon_update(struct ieee80211_hw *hw,
* the 'flags' field we are not using for beacons.
*/
guardian->flags = 0;
usb_fill_bulk_urb(guardian->priv, usb_dev,
usb_sndbulkpipe(usb_dev, 1),
usb_fill_bulk_urb(guardian->priv, usb_dev, pipe,
&guardian->flags, 1, rt2500usb_beacondone, guardian);
/*
@ -1741,6 +1750,7 @@ static const struct rt2x00lib_ops rt2500usb_rt2x00_ops = {
.link_tuner = rt2500usb_link_tuner,
.write_tx_desc = rt2500usb_write_tx_desc,
.write_tx_data = rt2x00usb_write_tx_data,
.get_tx_data_len = rt2500usb_get_tx_data_len,
.kick_tx_queue = rt2500usb_kick_tx_queue,
.fill_rxdone = rt2500usb_fill_rxdone,
.config_mac_addr = rt2500usb_config_mac_addr,

2
drivers/net/wireless/rt2x00/rt2x00.h
View File

@ -396,6 +396,8 @@ struct rt2x00lib_ops {
int (*write_tx_data) (struct rt2x00_dev *rt2x00dev,
struct data_ring *ring, struct sk_buff *skb,
struct ieee80211_tx_control *control);
int (*get_tx_data_len) (struct rt2x00_dev *rt2x00dev, int maxpacket,
struct sk_buff *skb);
void (*kick_tx_queue) (struct rt2x00_dev *rt2x00dev,
unsigned int queue);

29
drivers/net/wireless/rt2x00/rt2x00usb.c
View File

@ -157,9 +157,10 @@ int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev,
{
struct usb_device *usb_dev =
interface_to_usbdev(rt2x00dev_usb(rt2x00dev));
struct ieee80211_hdr *ieee80211hdr = (struct ieee80211_hdr *)skb->data;
struct data_entry *entry = rt2x00_get_data_entry(ring);
u32 length = skb->len;
int pipe = usb_sndbulkpipe(usb_dev, 1);
int max_packet = usb_maxpacket(usb_dev, pipe, 1);
u32 length;
if (rt2x00_ring_full(ring)) {
ieee80211_stop_queue(rt2x00dev->hw, control->queue);
@ -178,25 +179,29 @@ int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev,
/*
* Add the descriptor in front of the skb.
*/
skb_push(skb, rt2x00dev->hw->extra_tx_headroom);
memset(skb->data, 0x00, rt2x00dev->hw->extra_tx_headroom);
skb_push(skb, ring->desc_size);
memset(skb->data, 0, ring->desc_size);
rt2x00lib_write_tx_desc(rt2x00dev, (struct data_desc *)skb->data,
ieee80211hdr, length, control);
(struct ieee80211_hdr *)(skb->data +
ring->desc_size),
skb->len - ring->desc_size, control);
memcpy(&entry->tx_status.control, control, sizeof(*control));
entry->skb = skb;
/*
* Length passed to usb_fill_urb cannot be an odd number,
* so add 1 byte to make it even.
* 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->hw->extra_tx_headroom;
if (length % 2)
length++;
length = rt2x00dev->ops->lib->get_tx_data_len(rt2x00dev,
max_packet, skb);
/*
* Initialize URB and send the frame to the device.
*/
__set_bit(ENTRY_OWNER_NIC, &entry->flags);
usb_fill_bulk_urb(entry->priv, usb_dev,
usb_sndbulkpipe(usb_dev, 1),
usb_fill_bulk_urb(entry->priv, usb_dev, pipe,
skb->data, length, rt2x00usb_interrupt_txdone, entry);
usb_submit_urb(entry->priv, GFP_ATOMIC);

16
drivers/net/wireless/rt2x00/rt73usb.c
View File

@ -1286,6 +1286,21 @@ static void rt73usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
rt2x00_desc_write(txd, 0, word);
}
static int rt73usb_get_tx_data_len(struct rt2x00_dev *rt2x00dev,
int maxpacket, struct sk_buff *skb)
{
int length;
/*
* The length _must_ be a multiple of 4,
* but it must _not_ be a multiple of the USB packet size.
*/
length = roundup(skb->len, 4);
length += (4 * !(length % maxpacket));
return length;
}
/*
* TX data initialization
*/
@ -2012,6 +2027,7 @@ static const struct rt2x00lib_ops rt73usb_rt2x00_ops = {
.link_tuner = rt73usb_link_tuner,
.write_tx_desc = rt73usb_write_tx_desc,
.write_tx_data = rt2x00usb_write_tx_data,
.get_tx_data_len = rt73usb_get_tx_data_len,
.kick_tx_queue = rt73usb_kick_tx_queue,
.fill_rxdone = rt73usb_fill_rxdone,
.config_mac_addr = rt73usb_config_mac_addr,