Abstract: rt2x00 generic usb device routines.
*/
-/*
- * Set enviroment defines for rt2x00.h
- */
-#define DRV_NAME "rt2x00usb"
-
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/usb.h>
+#include <linux/bug.h>
#include "rt2x00.h"
#include "rt2x00usb.h"
/*
* Interfacing with the HW.
*/
-int rt2x00usb_vendor_request(const struct rt2x00_dev *rt2x00dev,
+int rt2x00usb_vendor_request(struct rt2x00_dev *rt2x00dev,
const u8 request, const u8 requesttype,
const u16 offset, const u16 value,
void *buffer, const u16 buffer_length,
(requesttype == USB_VENDOR_REQUEST_IN) ?
usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0);
+
for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
status = usb_control_msg(usb_dev, pipe, request, requesttype,
value, offset, buffer, buffer_length,
}
EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request);
-int rt2x00usb_vendor_request_buff(const struct rt2x00_dev *rt2x00dev,
- const u8 request, const u8 requesttype,
- const u16 offset, void *buffer,
- const u16 buffer_length, const int timeout)
+int rt2x00usb_vendor_req_buff_lock(struct rt2x00_dev *rt2x00dev,
+ const u8 request, const u8 requesttype,
+ const u16 offset, void *buffer,
+ const u16 buffer_length, const int timeout)
{
int status;
+ BUG_ON(!mutex_is_locked(&rt2x00dev->usb_cache_mutex));
+
/*
* Check for Cache availability.
*/
return status;
}
+EXPORT_SYMBOL_GPL(rt2x00usb_vendor_req_buff_lock);
+
+int rt2x00usb_vendor_request_buff(struct rt2x00_dev *rt2x00dev,
+ const u8 request, const u8 requesttype,
+ const u16 offset, void *buffer,
+ const u16 buffer_length, const int timeout)
+{
+ int status;
+
+ mutex_lock(&rt2x00dev->usb_cache_mutex);
+
+ status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request,
+ requesttype, offset, buffer,
+ buffer_length, timeout);
+
+ mutex_unlock(&rt2x00dev->usb_cache_mutex);
+
+ return status;
+}
EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_buff);
/*
struct data_entry *entry = (struct data_entry *)urb->context;
struct data_ring *ring = entry->ring;
struct rt2x00_dev *rt2x00dev = ring->rt2x00dev;
- struct data_desc *txd = (struct data_desc *)entry->skb->data;
+ __le32 *txd = (__le32 *)entry->skb->data;
u32 word;
int tx_status;
struct usb_device *usb_dev =
interface_to_usbdev(rt2x00dev_usb(rt2x00dev));
struct data_entry *entry = rt2x00_get_data_entry(ring);
- int pipe = usb_sndbulkpipe(usb_dev, 1);
+ struct skb_desc *desc;
u32 length;
- if (rt2x00_ring_full(ring)) {
- ieee80211_stop_queue(rt2x00dev->hw, control->queue);
+ if (rt2x00_ring_full(ring))
return -EINVAL;
- }
if (test_bit(ENTRY_OWNER_NIC, &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);
- ieee80211_stop_queue(rt2x00dev->hw, control->queue);
return -EINVAL;
}
skb_push(skb, ring->desc_size);
memset(skb->data, 0, ring->desc_size);
- rt2x00lib_write_tx_desc(rt2x00dev, (struct data_desc *)skb->data,
- (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;
+ /*
+ * Fill in skb descriptor
+ */
+ desc = get_skb_desc(skb);
+ desc->desc_len = ring->desc_size;
+ desc->data_len = skb->len - ring->desc_size;
+ desc->desc = skb->data;
+ desc->data = skb->data + ring->desc_size;
+ desc->ring = ring;
+ desc->entry = entry;
+
+ rt2x00lib_write_tx_desc(rt2x00dev, skb, control);
/*
* USB devices cannot blindly pass the skb->len as the
* Initialize URB and send the frame to the device.
*/
__set_bit(ENTRY_OWNER_NIC, &entry->flags);
- usb_fill_bulk_urb(entry->priv, usb_dev, pipe,
+ usb_fill_bulk_urb(entry->priv, usb_dev, usb_sndbulkpipe(usb_dev, 1),
skb->data, length, rt2x00usb_interrupt_txdone, entry);
usb_submit_urb(entry->priv, GFP_ATOMIC);
rt2x00_ring_index_inc(ring);
- if (rt2x00_ring_full(ring))
- ieee80211_stop_queue(rt2x00dev->hw, control->queue);
-
return 0;
}
EXPORT_SYMBOL_GPL(rt2x00usb_write_tx_data);
struct rt2x00_dev *rt2x00dev = ring->rt2x00dev;
struct sk_buff *skb;
struct ieee80211_hdr *hdr;
+ struct skb_desc *skbdesc;
struct rxdata_entry_desc desc;
int header_size;
int frame_size;
if (urb->actual_length < entry->ring->desc_size || urb->status)
goto skip_entry;
- memset(&desc, 0x00, sizeof(desc));
+ /*
+ * Fill in skb descriptor
+ */
+ skbdesc = get_skb_desc(entry->skb);
+ skbdesc->ring = ring;
+ skbdesc->entry = entry;
+
+ memset(&desc, 0, sizeof(desc));
rt2x00dev->ops->lib->fill_rxdone(entry, &desc);
/*
* 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.
+ * 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.
*/
frame_size = entry->ring->data_size + entry->ring->desc_size;
- skb = dev_alloc_skb(frame_size + NET_IP_ALIGN);
+ skb = dev_alloc_skb(frame_size + 2);
if (!skb)
goto skip_entry;
- skb_reserve(skb, NET_IP_ALIGN);
+ skb_reserve(skb, 2);
skb_put(skb, frame_size);
/*
* The data behind the ieee80211 header must be
* aligned on a 4 byte boundary.
- * After that trim the entire buffer down to only
- * contain the valid frame data excluding the device
- * descriptor.
*/
hdr = (struct ieee80211_hdr *)entry->skb->data;
header_size =
skb_push(entry->skb, 2);
memmove(entry->skb->data, entry->skb->data + 2, skb->len - 2);
}
+
+ /*
+ * Trim the entire buffer down to only contain the valid frame data
+ * excluding the device descriptor. The position of the descriptor
+ * varies. This means that we should check where the descriptor is
+ * and decide if we need to pull the data pointer to exclude the
+ * device descriptor.
+ */
+ if (skbdesc->data > skbdesc->desc)
+ skb_pull(entry->skb, skbdesc->desc_len);
skb_trim(entry->skb, desc.size);
/*
/*
* Radio handlers
*/
-void rt2x00usb_enable_radio(struct rt2x00_dev *rt2x00dev)
-{
- struct usb_device *usb_dev =
- interface_to_usbdev(rt2x00dev_usb(rt2x00dev));
- struct data_ring *ring;
- struct data_entry *entry;
- unsigned int i;
-
- /*
- * Initialize the TX rings
- */
- txringall_for_each(rt2x00dev, ring) {
- for (i = 0; i < ring->stats.limit; i++)
- ring->entry[i].flags = 0;
-
- rt2x00_ring_index_clear(ring);
- }
-
- /*
- * Initialize and start the RX ring.
- */
- rt2x00_ring_index_clear(rt2x00dev->rx);
-
- for (i = 0; i < rt2x00dev->rx->stats.limit; i++) {
- entry = &rt2x00dev->rx->entry[i];
-
- usb_fill_bulk_urb(entry->priv, usb_dev,
- usb_rcvbulkpipe(usb_dev, 1),
- entry->skb->data, entry->skb->len,
- rt2x00usb_interrupt_rxdone, entry);
-
- __set_bit(ENTRY_OWNER_NIC, &entry->flags);
- usb_submit_urb(entry->priv, GFP_ATOMIC);
- }
-}
-EXPORT_SYMBOL_GPL(rt2x00usb_enable_radio);
-
void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev)
{
struct data_ring *ring;
/*
* Device initialization handlers.
*/
+void rt2x00usb_init_rxentry(struct rt2x00_dev *rt2x00dev,
+ struct data_entry *entry)
+{
+ struct usb_device *usb_dev =
+ interface_to_usbdev(rt2x00dev_usb(rt2x00dev));
+
+ usb_fill_bulk_urb(entry->priv, usb_dev,
+ usb_rcvbulkpipe(usb_dev, 1),
+ entry->skb->data, entry->skb->len,
+ rt2x00usb_interrupt_rxdone, entry);
+
+ __set_bit(ENTRY_OWNER_NIC, &entry->flags);
+ usb_submit_urb(entry->priv, GFP_ATOMIC);
+}
+EXPORT_SYMBOL_GPL(rt2x00usb_init_rxentry);
+
+void rt2x00usb_init_txentry(struct rt2x00_dev *rt2x00dev,
+ struct data_entry *entry)
+{
+ entry->flags = 0;
+}
+EXPORT_SYMBOL_GPL(rt2x00usb_init_txentry);
+
static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev,
struct data_ring *ring)
{
struct sk_buff *skb;
unsigned int entry_size;
unsigned int i;
- int status;
+ int uninitialized_var(status);
/*
* Allocate DMA
rt2x00dev->dev = usb_intf;
rt2x00dev->ops = ops;
rt2x00dev->hw = hw;
+ mutex_init(&rt2x00dev->usb_cache_mutex);
rt2x00dev->usb_maxpacket =
usb_maxpacket(usb_dev, usb_sndbulkpipe(usb_dev, 1), 1);
projects / cascardo / linux.git / blobdiff