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rt2x00: trim skb_frame_desc to 32 bytes 

Remove frame_type from skb_frame_desc and pass it
as argument to rt2x00debug_dump_frame().

Change data_len and desc_len to unsigned short
to save another 4 bytes in skb_frame_desc. Note that
this was the only location where the data_len and
desc_len was not yet treated as unsigned short.

This trim is required to help mac80211 with adding
the TX control and TX status informtation into the
skb->cb structure. When that happens, drivers will
have approximately 40 bytes left to use freely.

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 2008-05-10 13:41:32 +02:00 committed by John W. Linville
parent 5b06c85c3b
commit 5a6e59991b
4 changed files with 13 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/wireless/rt2x00/rt2x00debug.c
View File

@ -115,7 +115,7 @@ struct rt2x00debug_intf {
};
void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
struct sk_buff *skb)
enum rt2x00_dump_type type, struct sk_buff *skb)
{
struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
struct skb_frame_desc *desc = get_skb_frame_desc(skb);
@ -148,7 +148,7 @@ void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
dump_hdr->chip_rt = cpu_to_le16(rt2x00dev->chip.rt);
dump_hdr->chip_rf = cpu_to_le16(rt2x00dev->chip.rf);
dump_hdr->chip_rev = cpu_to_le32(rt2x00dev->chip.rev);
dump_hdr->type = cpu_to_le16(desc->frame_type);
dump_hdr->type = cpu_to_le16(type);
dump_hdr->queue_index = desc->entry->queue->qid;
dump_hdr->entry_index = desc->entry->entry_idx;
dump_hdr->timestamp_sec = cpu_to_le32(timestamp.tv_sec);

13
drivers/net/wireless/rt2x00/rt2x00dev.c
View File

@ -28,7 +28,6 @@
#include "rt2x00.h"
#include "rt2x00lib.h"
#include "rt2x00dump.h"
/*
* Link tuning handlers
@ -540,11 +539,9 @@ void rt2x00lib_txdone(struct queue_entry *entry,
* If send to mac80211, mac80211 will clean up the skb structure,
* otherwise we have to do it ourself.
*/
rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb);
skbdesc = get_skb_frame_desc(entry->skb);
skbdesc->frame_type = DUMP_FRAME_TXDONE;
rt2x00debug_dump_frame(rt2x00dev, entry->skb);
if (!(skbdesc->flags & FRAME_DESC_DRIVER_GENERATED))
ieee80211_tx_status_irqsafe(rt2x00dev->hw,
entry->skb, &tx_status);
@ -610,8 +607,7 @@ void rt2x00lib_rxdone(struct queue_entry *entry,
* Send frame to mac80211 & debugfs.
* mac80211 will clean up the skb structure.
*/
get_skb_frame_desc(entry->skb)->frame_type = DUMP_FRAME_RXDONE;
rt2x00debug_dump_frame(rt2x00dev, entry->skb);
rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status);
entry->skb = NULL;
}
@ -752,8 +748,7 @@ void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
* frame to the device, but we are going to push the
* frame to debugfs here.
*/
skbdesc->frame_type = DUMP_FRAME_TX;
rt2x00debug_dump_frame(rt2x00dev, skb);
rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TX, skb);
}
EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc);

6
drivers/net/wireless/rt2x00/rt2x00lib.h
View File

@ -26,6 +26,8 @@
#ifndef RT2X00LIB_H
#define RT2X00LIB_H
#include "rt2x00dump.h"
/*
* Interval defines
* Both the link tuner as the rfkill will be called once per second.
@ -128,7 +130,8 @@ static inline void rt2x00lib_free_firmware(struct rt2x00_dev *rt2x00dev)
#ifdef CONFIG_RT2X00_LIB_DEBUGFS
void rt2x00debug_register(struct rt2x00_dev *rt2x00dev);
void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev);
void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb);
void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
enum rt2x00_dump_type type, struct sk_buff *skb);
#else
static inline void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
{
@ -139,6 +142,7 @@ static inline void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
}
static inline void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
enum rt2x00_dump_type type,
struct sk_buff *skb)
{
}

7
drivers/net/wireless/rt2x00/rt2x00queue.h
View File

@ -109,7 +109,6 @@ enum skb_frame_desc_flags {
* this structure should not exceed the size of that array (48 bytes).
*
* @flags: Frame flags, see &enum skb_frame_desc_flags.
* @frame_type: Frame type, see &enum rt2x00_dump_type.
* @data: Pointer to data part of frame (Start of ieee80211 header).
* @desc: Pointer to descriptor part of the frame.
* Note that this pointer could point to something outside
@ -121,14 +120,12 @@ enum skb_frame_desc_flags {
struct skb_frame_desc {
unsigned int flags;
unsigned int frame_type;
unsigned short data_len;
unsigned short desc_len;
void *data;
void *desc;
unsigned int data_len;
unsigned int desc_len;
struct queue_entry *entry;
};