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rt2x00: Don't use queue entry as parameter when creating TX descriptor.
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The functions that create the tx descriptor structure do not operate on
a queue entry at all. Signal this fact in the code by not providing a
queue entry as a parameter, but the rt2x00 device structure and the skb
directly.

This patch is a preparation for reducing the time a queue is locked for
a tx operation.

Signed-off-by: Gertjan van Wingerde <[email protected]>
Acked-by: Helmut Schaa <[email protected]>
Signed-off-by: Ivo van Doorn <[email protected]>
Signed-off-by: John W. Linville <[email protected]>
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@gwingerde @linvjw
gwingerde authored and linvjw committed Jul 7, 2011
1 parent 77a861c commit 77b5621
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Showing 3 changed files with 33 additions and 28 deletions.
6 changes: 3 additions & 3 deletions drivers/net/wireless/rt2x00/rt2x00crypto.c
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Original file line number Diff line number Diff line change
Expand Up @@ -45,11 +45,11 @@ enum cipher rt2x00crypto_key_to_cipher(struct ieee80211_key_conf *key)
}
}

void rt2x00crypto_create_tx_descriptor(struct queue_entry *entry,
void rt2x00crypto_create_tx_descriptor(struct rt2x00_dev *rt2x00dev,
struct sk_buff *skb,
struct txentry_desc *txdesc)
{
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
struct ieee80211_key_conf *hw_key = tx_info->control.hw_key;

if (!test_bit(CAPABILITY_HW_CRYPTO, &rt2x00dev->cap_flags) || !hw_key)
Expand Down
3 changes: 2 additions & 1 deletion drivers/net/wireless/rt2x00/rt2x00lib.h
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Original file line number Diff line number Diff line change
Expand Up @@ -336,7 +336,8 @@ static inline void rt2x00debug_update_crypto(struct rt2x00_dev *rt2x00dev,
*/
#ifdef CONFIG_RT2X00_LIB_CRYPTO
enum cipher rt2x00crypto_key_to_cipher(struct ieee80211_key_conf *key);
void rt2x00crypto_create_tx_descriptor(struct queue_entry *entry,
void rt2x00crypto_create_tx_descriptor(struct rt2x00_dev *rt2x00dev,
struct sk_buff *skb,
struct txentry_desc *txdesc);
unsigned int rt2x00crypto_tx_overhead(struct rt2x00_dev *rt2x00dev,
struct sk_buff *skb);
Expand Down
52 changes: 28 additions & 24 deletions drivers/net/wireless/rt2x00/rt2x00queue.c
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Original file line number Diff line number Diff line change
Expand Up @@ -200,19 +200,20 @@ void rt2x00queue_remove_l2pad(struct sk_buff *skb, unsigned int header_length)
skb_pull(skb, l2pad);
}

static void rt2x00queue_create_tx_descriptor_seq(struct queue_entry *entry,
static void rt2x00queue_create_tx_descriptor_seq(struct rt2x00_dev *rt2x00dev,
struct sk_buff *skb,
struct txentry_desc *txdesc)
{
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)entry->skb->data;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct rt2x00_intf *intf = vif_to_intf(tx_info->control.vif);

if (!(tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ))
return;

__set_bit(ENTRY_TXD_GENERATE_SEQ, &txdesc->flags);

if (!test_bit(REQUIRE_SW_SEQNO, &entry->queue->rt2x00dev->cap_flags))
if (!test_bit(REQUIRE_SW_SEQNO, &rt2x00dev->cap_flags))
return;

/*
Expand All @@ -237,12 +238,12 @@ static void rt2x00queue_create_tx_descriptor_seq(struct queue_entry *entry,

}

static void rt2x00queue_create_tx_descriptor_plcp(struct queue_entry *entry,
static void rt2x00queue_create_tx_descriptor_plcp(struct rt2x00_dev *rt2x00dev,
struct sk_buff *skb,
struct txentry_desc *txdesc,
const struct rt2x00_rate *hwrate)
{
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0];
unsigned int data_length;
unsigned int duration;
Expand All @@ -259,8 +260,8 @@ static void rt2x00queue_create_tx_descriptor_plcp(struct queue_entry *entry,
txdesc->u.plcp.ifs = IFS_SIFS;

/* Data length + CRC + Crypto overhead (IV/EIV/ICV/MIC) */
data_length = entry->skb->len + 4;
data_length += rt2x00crypto_tx_overhead(rt2x00dev, entry->skb);
data_length = skb->len + 4;
data_length += rt2x00crypto_tx_overhead(rt2x00dev, skb);

/*
* PLCP setup
Expand Down Expand Up @@ -301,13 +302,14 @@ static void rt2x00queue_create_tx_descriptor_plcp(struct queue_entry *entry,
}
}

static void rt2x00queue_create_tx_descriptor_ht(struct queue_entry *entry,
static void rt2x00queue_create_tx_descriptor_ht(struct rt2x00_dev *rt2x00dev,
struct sk_buff *skb,
struct txentry_desc *txdesc,
const struct rt2x00_rate *hwrate)
{
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0];
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)entry->skb->data;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;

if (tx_info->control.sta)
txdesc->u.ht.mpdu_density =
Expand Down Expand Up @@ -380,12 +382,12 @@ static void rt2x00queue_create_tx_descriptor_ht(struct queue_entry *entry,
txdesc->u.ht.txop = TXOP_HTTXOP;
}

static void rt2x00queue_create_tx_descriptor(struct queue_entry *entry,
static void rt2x00queue_create_tx_descriptor(struct rt2x00_dev *rt2x00dev,
struct sk_buff *skb,
struct txentry_desc *txdesc)
{
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)entry->skb->data;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0];
struct ieee80211_rate *rate;
const struct rt2x00_rate *hwrate = NULL;
Expand All @@ -395,8 +397,8 @@ static void rt2x00queue_create_tx_descriptor(struct queue_entry *entry,
/*
* Header and frame information.
*/
txdesc->length = entry->skb->len;
txdesc->header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
txdesc->length = skb->len;
txdesc->header_length = ieee80211_get_hdrlen_from_skb(skb);

/*
* Check whether this frame is to be acked.
Expand Down Expand Up @@ -471,13 +473,15 @@ static void rt2x00queue_create_tx_descriptor(struct queue_entry *entry,
/*
* Apply TX descriptor handling by components
*/
rt2x00crypto_create_tx_descriptor(entry, txdesc);
rt2x00queue_create_tx_descriptor_seq(entry, txdesc);
rt2x00crypto_create_tx_descriptor(rt2x00dev, skb, txdesc);
rt2x00queue_create_tx_descriptor_seq(rt2x00dev, skb, txdesc);

if (test_bit(REQUIRE_HT_TX_DESC, &rt2x00dev->cap_flags))
rt2x00queue_create_tx_descriptor_ht(entry, txdesc, hwrate);
rt2x00queue_create_tx_descriptor_ht(rt2x00dev, skb, txdesc,
hwrate);
else
rt2x00queue_create_tx_descriptor_plcp(entry, txdesc, hwrate);
rt2x00queue_create_tx_descriptor_plcp(rt2x00dev, skb, txdesc,
hwrate);
}

static int rt2x00queue_write_tx_data(struct queue_entry *entry,
Expand Down Expand Up @@ -588,7 +592,7 @@ int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb,
* for our information.
*/
entry->skb = skb;
rt2x00queue_create_tx_descriptor(entry, &txdesc);
rt2x00queue_create_tx_descriptor(queue->rt2x00dev, skb, &txdesc);

/*
* All information is retrieved from the skb->cb array,
Expand Down Expand Up @@ -707,7 +711,7 @@ int rt2x00queue_update_beacon_locked(struct rt2x00_dev *rt2x00dev,
* after that we are free to use the skb->cb array
* for our information.
*/
rt2x00queue_create_tx_descriptor(intf->beacon, &txdesc);
rt2x00queue_create_tx_descriptor(rt2x00dev, intf->beacon->skb, &txdesc);

/*
* Fill in skb descriptor
Expand Down

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