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rt2x00: Replace statically allocated DMA buffers with mapped skb's.

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The current PCI drivers require a lot of pre-allocated DMA buffers. Reduce this
by using dynamically mapped skb's (using pci_map_single) instead of the pre-
allocated DMA buffers that are allocated at device start-up time.

At the same time move common RX path code into rt2x00lib from rt2x00pci and
rt2x00usb, as the RX paths now are now almost the same.

Signed-off-by: Gertjan van Wingerde <gwingerde@kpnplanet.nl>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Gertjan van Wingerde
2008-06-16 19:56:31 +02:00
committed by John W. Linville
parent 30caa6e3d5
commit c4da004857
10 changed files with 204 additions and 176 deletions
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16
drivers/net/wireless/rt2x00/rt2x00queue.h
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@@ -83,9 +83,10 @@ enum data_queue_qid {
* enum skb_frame_desc_flags: Flags for &struct skb_frame_desc
*
*/
//enum skb_frame_desc_flags {
// TEMPORARILY EMPTY
//};
enum skb_frame_desc_flags {
SKBDESC_DMA_MAPPED_RX = (1 << 0),
SKBDESC_DMA_MAPPED_TX = (1 << 1),
};
/**
* struct skb_frame_desc: Descriptor information for the skb buffer
@@ -94,19 +95,20 @@ enum data_queue_qid {
* this structure should not exceed the size of that array (40 bytes).
*
* @flags: Frame flags, see &enum skb_frame_desc_flags.
* @data: Pointer to data part of frame (Start of ieee80211 header).
* @desc_len: Length of the frame descriptor.
* @desc: Pointer to descriptor part of the frame.
* Note that this pointer could point to something outside
* of the scope of the skb->data pointer.
* @data_len: Length of the frame data.
* @desc_len: Length of the frame descriptor.
* @skb_dma: (PCI-only) the DMA address associated with the sk buffer.
* @entry: The entry to which this sk buffer belongs.
*/
struct skb_frame_desc {
unsigned int flags;
void *desc;
unsigned int desc_len;
void *desc;
dma_addr_t skb_dma;
struct queue_entry *entry;
};