From: Ivo van Doorn Date: Sat, 6 Oct 2007 12:15:46 +0000 (+0200) Subject: [PATCH] rt2x00: Add get_tx_data_len callback function X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=dd9fa2d21aebbb618318954867c5dfe3751328be;p=linux-beck.git [PATCH] rt2x00: Add get_tx_data_len callback function 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 Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/rt2x00/rt2500usb.c b/drivers/net/wireless/rt2x00/rt2500usb.c index c70c677b3f73..f536ff1b5c47 100644 --- a/drivers/net/wireless/rt2x00/rt2500usb.c +++ b/drivers/net/wireless/rt2x00/rt2500usb.c @@ -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, diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h index 27bec6ec33df..a392e2a9d087 100644 --- a/drivers/net/wireless/rt2x00/rt2x00.h +++ b/drivers/net/wireless/rt2x00/rt2x00.h @@ -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); diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c index 66e47615f2a6..73cc726c4046 100644 --- a/drivers/net/wireless/rt2x00/rt2x00usb.c +++ b/drivers/net/wireless/rt2x00/rt2x00usb.c @@ -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); diff --git a/drivers/net/wireless/rt2x00/rt73usb.c b/drivers/net/wireless/rt2x00/rt73usb.c index 919cca593bc1..4a78ca79c94a 100644 --- a/drivers/net/wireless/rt2x00/rt73usb.c +++ b/drivers/net/wireless/rt2x00/rt73usb.c @@ -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,