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ath9k: Revamp transmit control block

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Use the ath_buf instance associated with each tx frame
directly and remove all redundant information in ath_tx_control.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Sujith 2008-10-29 10:14:26 +05:30 committed by John W. Linville
parent c51701632c
commit 528f0c6b3b
4 changed files with 332 additions and 350 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/wireless/ath9k/beacon.c
View File

@ -114,7 +114,7 @@ static void ath_beacon_setup(struct ath_softc *sc,
ath9k_hw_set11n_txdesc(ah, ds,
skb->len + FCS_LEN, /* frame length */
ATH9K_PKT_TYPE_BEACON, /* Atheros packet type */
avp->av_btxctl.txpower, /* txpower XXX */
MAX_RATE_POWER, /* FIXME */
ATH9K_TXKEYIX_INVALID, /* no encryption */
ATH9K_KEY_TYPE_CLEAR, /* no encryption */
flags /* no ack,

30
drivers/net/wireless/ath9k/core.h
View File

@ -84,9 +84,6 @@ struct ath_node;
#define TSF_TO_TU(_h,_l) \
((((u32)(_h)) << 22) | (((u32)(_l)) >> 10))
#define ATH9K_BH_STATUS_INTACT 0
#define ATH9K_BH_STATUS_CHANGE 1
#define ATH_TXQ_SETUP(sc, i) ((sc)->sc_txqsetup & (1<<i))
static inline unsigned long get_timestamp(void)
@ -209,6 +206,7 @@ struct ath_buf_state {
struct ath_rc_series bfs_rcs[4]; /* rate series */
u32 bf_type; /* BUF_* (enum buffer_type) */
/* key type use to encrypt this frame */
u32 bfs_keyix;
enum ath9k_key_type bfs_keytype;
};
@ -219,6 +217,7 @@ struct ath_buf_state {
#define bf_seqno bf_state.bfs_seqno
#define bf_tidno bf_state.bfs_tidno
#define bf_rcs bf_state.bfs_rcs
#define bf_keyix bf_state.bfs_keyix
#define bf_keytype bf_state.bfs_keytype
#define bf_isdata(bf) (bf->bf_state.bf_type & BUF_DATA)
#define bf_isaggr(bf) (bf->bf_state.bf_type & BUF_AGGR)
@ -244,7 +243,6 @@ struct ath_buf {
struct ath_buf *bf_next; /* next subframe in the aggregate */
struct ath_buf *bf_rifslast; /* last buf for RIFS burst */
void *bf_mpdu; /* enclosing frame structure */
void *bf_node; /* pointer to the node */
struct ath_desc *bf_desc; /* virtual addr of desc */
dma_addr_t bf_daddr; /* physical addr of desc */
dma_addr_t bf_buf_addr; /* physical addr of data buffer */
@ -493,24 +491,8 @@ struct ath_atx {
/* per-frame tx control block */
struct ath_tx_control {
struct ath_node *an;
struct ath_txq *txq;
int if_id;
int qnum;
u32 ht:1;
u32 ps:1;
u32 use_minrate:1;
enum ath9k_pkt_type atype;
enum ath9k_key_type keytype;
u32 flags;
u16 seqno;
u16 tidno;
u16 txpower;
u16 frmlen;
u32 keyix;
int min_rate;
int mcast_rate;
struct ath_softc *dev;
dma_addr_t dmacontext;
};
/* per frame tx status block */
@ -551,15 +533,17 @@ void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq);
int ath_tx_init(struct ath_softc *sc, int nbufs);
int ath_tx_cleanup(struct ath_softc *sc);
int ath_tx_get_qnum(struct ath_softc *sc, int qtype, int haltype);
struct ath_txq *ath_test_get_txq(struct ath_softc *sc, struct sk_buff *skb);
int ath_txq_update(struct ath_softc *sc, int qnum,
struct ath9k_tx_queue_info *q);
int ath_tx_start(struct ath_softc *sc, struct sk_buff *skb);
int ath_tx_start(struct ath_softc *sc, struct sk_buff *skb,
struct ath_tx_control *txctl);
void ath_tx_tasklet(struct ath_softc *sc);
u32 ath_txq_depth(struct ath_softc *sc, int qnum);
u32 ath_txq_aggr_depth(struct ath_softc *sc, int qnum);
void ath_notify_txq_status(struct ath_softc *sc, u16 queue_depth);
void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
struct ath_xmit_status *tx_status, struct ath_node *an);
struct ath_xmit_status *tx_status);
void ath_tx_cabq(struct ath_softc *sc, struct sk_buff *skb);
/**********************/

25
drivers/net/wireless/ath9k/main.c
View File

@ -412,7 +412,7 @@ void ath_get_beaconconfig(struct ath_softc *sc,
}
void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
struct ath_xmit_status *tx_status, struct ath_node *an)
struct ath_xmit_status *tx_status)
{
struct ieee80211_hw *hw = sc->hw;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
@ -906,6 +906,7 @@ static int ath_attach(u16 devid,
}
hw->queues = 4;
hw->sta_data_size = sizeof(struct ath_node);
/* Register rate control */
hw->rate_control_algorithm = "ath9k_rate_control";
@ -1016,9 +1017,12 @@ static int ath9k_start(struct ieee80211_hw *hw)
static int ath9k_tx(struct ieee80211_hw *hw,
struct sk_buff *skb)
{
struct ath_softc *sc = hw->priv;
int hdrlen, padsize;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ath_softc *sc = hw->priv;
struct ath_tx_control txctl;
int hdrlen, padsize;
memset(&txctl, 0, sizeof(struct ath_tx_control));
/*
* As a temporary workaround, assign seq# here; this will likely need
@ -1043,17 +1047,24 @@ static int ath9k_tx(struct ieee80211_hw *hw,
memmove(skb->data, skb->data + padsize, hdrlen);
}
/* Check if a tx queue is available */
txctl.txq = ath_test_get_txq(sc, skb);
if (!txctl.txq)
goto exit;
DPRINTF(sc, ATH_DBG_XMIT, "%s: transmitting packet, skb: %p\n",
__func__,
skb);
if (ath_tx_start(sc, skb) != 0) {
if (ath_tx_start(sc, skb, &txctl) != 0) {
DPRINTF(sc, ATH_DBG_XMIT, "%s: TX failed\n", __func__);
dev_kfree_skb_any(skb);
/* FIXME: Check for proper return value from ATH_DEV */
return 0;
goto exit;
}
return 0;
exit:
dev_kfree_skb_any(skb);
return 0;
}

625
drivers/net/wireless/ath9k/xmit.c
View File

@ -136,15 +136,17 @@ static int ath_aggr_query(struct ath_softc *sc,
return 0;
}
static enum ath9k_pkt_type get_hal_packet_type(struct ieee80211_hdr *hdr)
/* Calculate Atheros packet type from IEEE80211 packet header */
static enum ath9k_pkt_type get_hw_packet_type(struct sk_buff *skb)
{
struct ieee80211_hdr *hdr;
enum ath9k_pkt_type htype;
__le16 fc;
hdr = (struct ieee80211_hdr *)skb->data;
fc = hdr->frame_control;
/* Calculate Atheros packet type from IEEE80211 packet header */
if (ieee80211_is_beacon(fc))
htype = ATH9K_PKT_TYPE_BEACON;
else if (ieee80211_is_probe_resp(fc))
@ -159,214 +161,176 @@ static enum ath9k_pkt_type get_hal_packet_type(struct ieee80211_hdr *hdr)
return htype;
}
static void fill_min_rates(struct sk_buff *skb, struct ath_tx_control *txctl)
static bool check_min_rate(struct sk_buff *skb)
{
struct ieee80211_hdr *hdr;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
struct ath_tx_info_priv *tx_info_priv;
bool use_minrate = false;
__le16 fc;
hdr = (struct ieee80211_hdr *)skb->data;
fc = hdr->frame_control;
/* XXX: HACK! */
tx_info_priv = (struct ath_tx_info_priv *)tx_info->control.vif;
if (ieee80211_is_mgmt(fc) || ieee80211_is_ctl(fc)) {
txctl->use_minrate = 1;
txctl->min_rate = tx_info_priv->min_rate;
use_minrate = true;
} else if (ieee80211_is_data(fc)) {
if (ieee80211_is_nullfunc(fc) ||
/* Port Access Entity (IEEE 802.1X) */
(skb->protocol == cpu_to_be16(ETH_P_PAE))) {
txctl->use_minrate = 1;
txctl->min_rate = tx_info_priv->min_rate;
/* Port Access Entity (IEEE 802.1X) */
(skb->protocol == cpu_to_be16(ETH_P_PAE))) {
use_minrate = true;
}
if (is_multicast_ether_addr(hdr->addr1))
txctl->mcast_rate = tx_info_priv->min_rate;
}
return use_minrate;
}
/* This function will setup additional txctl information, mostly rate stuff */
/* FIXME: seqno, ps */
static int ath_tx_prepare(struct ath_softc *sc,
struct sk_buff *skb,
struct ath_tx_control *txctl)
static int get_hw_crypto_keytype(struct sk_buff *skb)
{
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
if (tx_info->control.hw_key) {
if (tx_info->control.hw_key->alg == ALG_WEP)
return ATH9K_KEY_TYPE_WEP;
else if (tx_info->control.hw_key->alg == ALG_TKIP)
return ATH9K_KEY_TYPE_TKIP;
else if (tx_info->control.hw_key->alg == ALG_CCMP)
return ATH9K_KEY_TYPE_AES;
}
return ATH9K_KEY_TYPE_CLEAR;
}
static void setup_rate_retries(struct ath_softc *sc, struct sk_buff *skb)
{
struct ieee80211_hw *hw = sc->hw;
struct ieee80211_hdr *hdr;
struct ath_rc_series *rcs;
struct ath_txq *txq = NULL;
const struct ath9k_rate_table *rt;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
struct ath_tx_info_priv *tx_info_priv;
int hdrlen;
u8 rix, antenna;
struct ath_rc_series *rcs;
struct ieee80211_hdr *hdr;
const struct ath9k_rate_table *rt;
bool use_minrate;
__le16 fc;
u8 *qc;
txctl->dev = sc;
hdr = (struct ieee80211_hdr *)skb->data;
hdrlen = ieee80211_get_hdrlen_from_skb(skb);
fc = hdr->frame_control;
u8 rix;
rt = sc->sc_currates;
BUG_ON(!rt);
if (ieee80211_is_data_qos(fc)) {
qc = ieee80211_get_qos_ctl(hdr);
txctl->tidno = qc[0] & 0xf;
}
txctl->if_id = 0;
txctl->frmlen = skb->len + FCS_LEN - (hdrlen & 3);
/* Always try at highest power possible unless the the device
* was configured by the user to use another power. */
if (likely(sc->sc_config.txpowlimit == ATH_TXPOWER_MAX))
txctl->txpower = ATH_TXPOWER_MAX;
else
txctl->txpower = sc->sc_config.txpowlimit;
/* Fill Key related fields */
txctl->keytype = ATH9K_KEY_TYPE_CLEAR;
txctl->keyix = ATH9K_TXKEYIX_INVALID;
if (tx_info->control.hw_key) {
txctl->keyix = tx_info->control.hw_key->hw_key_idx;
txctl->frmlen += tx_info->control.hw_key->icv_len;
if (tx_info->control.hw_key->alg == ALG_WEP)
txctl->keytype = ATH9K_KEY_TYPE_WEP;
else if (tx_info->control.hw_key->alg == ALG_TKIP)
txctl->keytype = ATH9K_KEY_TYPE_TKIP;
else if (tx_info->control.hw_key->alg == ALG_CCMP)
txctl->keytype = ATH9K_KEY_TYPE_AES;
}
/* Fill packet type */
txctl->atype = get_hal_packet_type(hdr);
/* Fill qnum */
if (unlikely(txctl->flags & ATH9K_TXDESC_CAB)) {
txctl->qnum = 0;
txq = sc->sc_cabq;
} else {
txctl->qnum = ath_get_hal_qnum(skb_get_queue_mapping(skb), sc);
txq = &sc->sc_txq[txctl->qnum];
}
spin_lock_bh(&txq->axq_lock);
/* Try to avoid running out of descriptors */
if (txq->axq_depth >= (ATH_TXBUF - 20) &&
!(txctl->flags & ATH9K_TXDESC_CAB)) {
DPRINTF(sc, ATH_DBG_FATAL,
"%s: TX queue: %d is full, depth: %d\n",
__func__,
txctl->qnum,
txq->axq_depth);
ieee80211_stop_queue(hw, skb_get_queue_mapping(skb));
txq->stopped = 1;
spin_unlock_bh(&txq->axq_lock);
return -1;
}
spin_unlock_bh(&txq->axq_lock);
/* Fill rate */
fill_min_rates(skb, txctl);
/* Fill flags */
txctl->flags |= ATH9K_TXDESC_CLRDMASK /* needed for crypto errors */
| ATH9K_TXDESC_INTREQ; /* Generate an interrupt */
if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK)
txctl->flags |= ATH9K_TXDESC_NOACK;
if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
txctl->flags |= ATH9K_TXDESC_RTSENA;
/*
* Setup for rate calculations.
*/
/* XXX: HACK! */
tx_info_priv = (struct ath_tx_info_priv *)tx_info->control.vif;
hdr = (struct ieee80211_hdr *)skb->data;
fc = hdr->frame_control;
tx_info_priv = (struct ath_tx_info_priv *)tx_info->control.vif; /* HACK */
rcs = tx_info_priv->rcs;
if (ieee80211_is_data(fc) && !txctl->use_minrate) {
/* Enable HT only for DATA frames and not for EAPOL */
/* XXX why AMPDU only?? */
txctl->ht = (hw->conf.ht.enabled &&
(tx_info->flags & IEEE80211_TX_CTL_AMPDU));
/* Check if min rates have to be used */
use_minrate = check_min_rate(skb);
if (ieee80211_is_data(fc) && !use_minrate) {
if (is_multicast_ether_addr(hdr->addr1)) {
rcs[0].rix = (u8)
ath_tx_findindex(rt, txctl->mcast_rate);
/*
* mcast packets are not re-tried.
*/
rcs[0].rix =
ath_tx_findindex(rt, tx_info_priv->min_rate);
/* mcast packets are not re-tried */
rcs[0].tries = 1;
}
/* For HT capable stations, we save tidno for later use.
* We also override seqno set by upper layer with the one
* in tx aggregation state.
*
* First, the fragmentation stat is determined.
* If fragmentation is on, the sequence number is
* not overridden, since it has been
* incremented by the fragmentation routine.
*/
if (likely(!(txctl->flags & ATH9K_TXDESC_FRAG_IS_ON)) &&
txctl->ht && (sc->sc_flags & SC_OP_TXAGGR)) {
struct ath_atx_tid *tid;
tid = ATH_AN_2_TID(txctl->an, txctl->tidno);
hdr->seq_ctrl = cpu_to_le16(tid->seq_next <<
IEEE80211_SEQ_SEQ_SHIFT);
txctl->seqno = tid->seq_next;
INCR(tid->seq_next, IEEE80211_SEQ_MAX);
}
} else {
/* for management and control frames,
* or for NULL and EAPOL frames */
if (txctl->min_rate)
rcs[0].rix = ath_rate_findrateix(sc, txctl->min_rate);
or for NULL and EAPOL frames */
if (use_minrate)
rcs[0].rix = ath_rate_findrateix(sc, tx_info_priv->min_rate);
else
rcs[0].rix = 0;
rcs[0].tries = ATH_MGT_TXMAXTRY;
}
rix = rcs[0].rix;
if (ieee80211_has_morefrags(fc) ||
(le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG)) {
/*
** Force hardware to use computed duration for next
** fragment by disabling multi-rate retry, which
** updates duration based on the multi-rate
** duration table.
*/
rcs[1].tries = rcs[2].tries = rcs[3].tries = 0;
rcs[1].rix = rcs[2].rix = rcs[3].rix = 0;
/* reset tries but keep rate index */
rcs[0].tries = ATH_TXMAXTRY;
}
}
if (is_multicast_ether_addr(hdr->addr1)) {
antenna = sc->sc_mcastantenna + 1;
sc->sc_mcastantenna = (sc->sc_mcastantenna + 1) & 0x1;
/* Called only when tx aggregation is enabled and HT is supported */
static void assign_aggr_tid_seqno(struct sk_buff *skb,
struct ath_buf *bf)
{
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
struct ieee80211_hdr *hdr;
struct ath_node *an;
struct ath_atx_tid *tid;
__le16 fc;
u8 *qc;
if (!tx_info->control.sta)
return;
an = (struct ath_node *)tx_info->control.sta->drv_priv;
hdr = (struct ieee80211_hdr *)skb->data;
fc = hdr->frame_control;
/* Get tidno */
if (ieee80211_is_data_qos(fc)) {
qc = ieee80211_get_qos_ctl(hdr);
bf->bf_tidno = qc[0] & 0xf;
}
return 0;
/* Get seqno */
if (ieee80211_is_data(fc) && !check_min_rate(skb)) {
/* For HT capable stations, we save tidno for later use.
* We also override seqno set by upper layer with the one
* in tx aggregation state.
*
* If fragmentation is on, the sequence number is
* not overridden, since it has been
* incremented by the fragmentation routine.
*
* FIXME: check if the fragmentation threshold exceeds
* IEEE80211 max.
*/
tid = ATH_AN_2_TID(an, bf->bf_tidno);
hdr->seq_ctrl = cpu_to_le16(tid->seq_next <<
IEEE80211_SEQ_SEQ_SHIFT);
bf->bf_seqno = tid->seq_next;
INCR(tid->seq_next, IEEE80211_SEQ_MAX);
}
}
static int setup_tx_flags(struct ath_softc *sc, struct sk_buff *skb,
struct ath_txq *txq)
{
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
int flags = 0;
flags |= ATH9K_TXDESC_CLRDMASK; /* needed for crypto errors */
flags |= ATH9K_TXDESC_INTREQ;
if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK)
flags |= ATH9K_TXDESC_NOACK;
if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
flags |= ATH9K_TXDESC_RTSENA;
return flags;
}
static struct ath_buf *ath_tx_get_buffer(struct ath_softc *sc)
{
struct ath_buf *bf = NULL;
spin_lock_bh(&sc->sc_txbuflock);
if (unlikely(list_empty(&sc->sc_txbuf))) {
spin_unlock_bh(&sc->sc_txbuflock);
return NULL;
}
bf = list_first_entry(&sc->sc_txbuf, struct ath_buf, list);
list_del(&bf->list);
spin_unlock_bh(&sc->sc_txbuflock);
return bf;
}
/* To complete a chain of buffers associated a frame */
@ -402,7 +366,7 @@ static void ath_tx_complete_buf(struct ath_softc *sc,
skb->len,
PCI_DMA_TODEVICE);
/* complete this frame */
ath_tx_complete(sc, skb, &tx_status, bf->bf_node);
ath_tx_complete(sc, skb, &tx_status);
/*
* Return the list of ath_buf of this mpdu to free queue
@ -615,7 +579,15 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
u32 ctsduration = 0;
u8 rix = 0, cix, ctsrate = 0;
u32 aggr_limit_with_rts = ah->ah_caps.rts_aggr_limit;
struct ath_node *an = (struct ath_node *) bf->bf_node;
struct ath_node *an = NULL;
struct sk_buff *skb;
struct ieee80211_tx_info *tx_info;
skb = (struct sk_buff *)bf->bf_mpdu;
tx_info = IEEE80211_SKB_CB(skb);
if (tx_info->control.sta)
an = (struct ath_node *)tx_info->control.sta->drv_priv;
/*
* get the cix for the lowest valid rix.
@ -654,7 +626,6 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
* use RTS.
*/
if ((ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT) && bf_isdata(bf)) {
BUG_ON(!an);
/*
* 802.11g protection not needed, use our default behavior
*/
@ -664,7 +635,7 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
* For dynamic MIMO PS, RTS needs to precede the first aggregate
* and the second aggregate should have any protection at all.
*/
if (an->an_smmode == ATH_SM_PWRSAV_DYNAMIC) {
if (an && an->an_smmode == ATH_SM_PWRSAV_DYNAMIC) {
if (!bf_isaggrburst(bf)) {
flags = ATH9K_TXDESC_RTSENA;
dynamic_mimops = 1;
@ -736,7 +707,7 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
(bf->bf_rcs[i].flags & ATH_RC_SGI_FLAG),
bf_isshpreamble(bf));
if ((an->an_smmode == ATH_SM_PWRSAV_STATIC) &&
if (an && (an->an_smmode == ATH_SM_PWRSAV_STATIC) &&
(bf->bf_rcs[i].flags & ATH_RC_DS_FLAG) == 0) {
/*
* When sending to an HT node that has enabled static
@ -888,8 +859,10 @@ static void ath_tx_complete_aggr_rifs(struct ath_softc *sc,
struct list_head *bf_q,
int txok)
{
struct ath_node *an = bf->bf_node;
struct ath_atx_tid *tid = ATH_AN_2_TID(an, bf->bf_tidno);
struct ath_node *an = NULL;
struct sk_buff *skb;
struct ieee80211_tx_info *tx_info;
struct ath_atx_tid *tid = NULL;
struct ath_buf *bf_last = bf->bf_lastbf;
struct ath_desc *ds = bf_last->bf_desc;
struct ath_buf *bf_next, *bf_lastq = NULL;
@ -898,6 +871,14 @@ static void ath_tx_complete_aggr_rifs(struct ath_softc *sc,
u32 ba[WME_BA_BMP_SIZE >> 5];
int isaggr, txfail, txpending, sendbar = 0, needreset = 0;
skb = (struct sk_buff *)bf->bf_mpdu;
tx_info = IEEE80211_SKB_CB(skb);
if (tx_info->control.sta) {
an = (struct ath_node *)tx_info->control.sta->drv_priv;
tid = ATH_AN_2_TID(an, bf->bf_tidno);
}
isaggr = bf_isaggr(bf);
if (isaggr) {
if (txok) {
@ -1030,7 +1011,6 @@ static void ath_tx_complete_aggr_rifs(struct ath_softc *sc,
/* copy descriptor content */
tbf->bf_mpdu = bf_last->bf_mpdu;
tbf->bf_node = bf_last->bf_node;
tbf->bf_buf_addr = bf_last->bf_buf_addr;
*(tbf->bf_desc) = *(bf_last->bf_desc);
@ -1364,7 +1344,6 @@ static void ath_tx_addto_baw(struct ath_softc *sc,
*/
static int ath_tx_send_ampdu(struct ath_softc *sc,
struct ath_txq *txq,
struct ath_atx_tid *tid,
struct list_head *bf_head,
struct ath_tx_control *txctl)
@ -1378,8 +1357,6 @@ static int ath_tx_send_ampdu(struct ath_softc *sc,
bf = list_first_entry(bf_head, struct ath_buf, list);
bf->bf_state.bf_type |= BUF_AMPDU;
bf->bf_seqno = txctl->seqno; /* save seqno and tidno in buffer */
bf->bf_tidno = txctl->tidno;
/*
* Do not queue to h/w when any of the following conditions is true:
@ -1390,13 +1367,13 @@ static int ath_tx_send_ampdu(struct ath_softc *sc,
*/
if (!list_empty(&tid->buf_q) || tid->paused ||
!BAW_WITHIN(tid->seq_start, tid->baw_size, bf->bf_seqno) ||
txq->axq_depth >= ATH_AGGR_MIN_QDEPTH) {
txctl->txq->axq_depth >= ATH_AGGR_MIN_QDEPTH) {
/*
* Add this frame to software queue for scheduling later
* for aggregation.
*/
list_splice_tail_init(bf_head, &tid->buf_q);
ath_tx_queue_tid(txq, tid);
ath_tx_queue_tid(txctl->txq, tid);
return 0;
}
@ -1413,7 +1390,7 @@ static int ath_tx_send_ampdu(struct ath_softc *sc,
bf->bf_nframes = 1;
bf->bf_lastbf = bf->bf_lastfrm; /* one single frame */
ath_buf_set_rate(sc, bf);
ath_tx_txqaddbuf(sc, txq, bf_head);
ath_tx_txqaddbuf(sc, txctl->txq, bf_head);
return 0;
}
@ -1836,46 +1813,27 @@ static void ath_txq_drain_pending_buffers(struct ath_softc *sc,
}
}
static int ath_tx_start_dma(struct ath_softc *sc,
struct sk_buff *skb,
struct scatterlist *sg,
u32 n_sg,
struct ath_tx_control *txctl)
static void ath_tx_setup_buffer(struct ath_softc *sc, struct ath_buf *bf,
struct sk_buff *skb, struct scatterlist *sg,
struct ath_tx_control *txctl)
{
struct ath_node *an = txctl->an;
struct ath_buf *bf = NULL;
struct list_head bf_head;
struct ath_desc *ds;
struct ath_hal *ah = sc->sc_ah;
struct ath_txq *txq;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct ath_tx_info_priv *tx_info_priv;
struct ath_rc_series *rcs;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
__le16 fc = hdr->frame_control;
int hdrlen;
__le16 fc;
if (unlikely(txctl->flags & ATH9K_TXDESC_CAB))
txq = sc->sc_cabq;
else
txq = &sc->sc_txq[txctl->qnum];
tx_info_priv = (struct ath_tx_info_priv *)tx_info->control.vif;
hdrlen = ieee80211_get_hdrlen_from_skb(skb);
fc = hdr->frame_control;
rcs = tx_info_priv->rcs;
/* For each sglist entry, allocate an ath_buf for DMA */
INIT_LIST_HEAD(&bf_head);
spin_lock_bh(&sc->sc_txbuflock);
if (unlikely(list_empty(&sc->sc_txbuf))) {
spin_unlock_bh(&sc->sc_txbuflock);
return -ENOMEM;
}
bf = list_first_entry(&sc->sc_txbuf, struct ath_buf, list);
list_del(&bf->list);
spin_unlock_bh(&sc->sc_txbuflock);
list_add_tail(&bf->list, &bf_head);
/* set up this buffer */
ATH_TXBUF_RESET(bf);
bf->bf_frmlen = txctl->frmlen;
/* Frame type */
bf->bf_frmlen = skb->len + FCS_LEN - (hdrlen & 3);
ieee80211_is_data(fc) ?
(bf->bf_state.bf_type |= BUF_DATA) :
@ -1889,121 +1847,143 @@ static int ath_tx_start_dma(struct ath_softc *sc,
(sc->sc_flags & SC_OP_PREAMBLE_SHORT) ?
(bf->bf_state.bf_type |= BUF_SHORT_PREAMBLE) :
(bf->bf_state.bf_type &= ~BUF_SHORT_PREAMBLE);
(sc->hw->conf.ht.enabled &&
(tx_info->flags & IEEE80211_TX_CTL_AMPDU)) ?
(bf->bf_state.bf_type |= BUF_HT) :
(bf->bf_state.bf_type &= ~BUF_HT);
bf->bf_flags = setup_tx_flags(sc, skb, txctl->txq);
/* Crypto */
bf->bf_keytype = get_hw_crypto_keytype(skb);
if (bf->bf_keytype != ATH9K_KEY_TYPE_CLEAR) {
bf->bf_frmlen += tx_info->control.hw_key->icv_len;
bf->bf_keyix = tx_info->control.hw_key->hw_key_idx;
} else {
bf->bf_keyix = ATH9K_TXKEYIX_INVALID;
}
/* Rate series */
setup_rate_retries(sc, skb);
bf->bf_flags = txctl->flags;
bf->bf_keytype = txctl->keytype;
/* XXX: HACK! */
tx_info_priv = (struct ath_tx_info_priv *)tx_info->control.vif;
rcs = tx_info_priv->rcs;
bf->bf_rcs[0] = rcs[0];
bf->bf_rcs[1] = rcs[1];
bf->bf_rcs[2] = rcs[2];
bf->bf_rcs[3] = rcs[3];
bf->bf_node = an;
/* Assign seqno, tidno */
if (bf_isht(bf) && (sc->sc_flags & SC_OP_TXAGGR))
assign_aggr_tid_seqno(skb, bf);
/* DMA setup */
bf->bf_mpdu = skb;
bf->bf_buf_addr = sg_dma_address(sg);
bf->bf_dmacontext = pci_map_single(sc->pdev, skb->data,
skb->len, PCI_DMA_TODEVICE);
bf->bf_buf_addr = bf->bf_dmacontext;
}
/* FIXME: tx power */
static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf,
struct scatterlist *sg, u32 n_sg,
struct ath_tx_control *txctl)
{
struct sk_buff *skb = (struct sk_buff *)bf->bf_mpdu;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
struct ath_node *an = NULL;
struct list_head bf_head;
struct ath_desc *ds;
struct ath_atx_tid *tid;
struct ath_hal *ah = sc->sc_ah;
int frm_type;
if (tx_info->control.sta) {
an = (struct ath_node *)tx_info->control.sta->drv_priv;
tid = ATH_AN_2_TID(an, bf->bf_tidno);
}
frm_type = get_hw_packet_type(skb);
INIT_LIST_HEAD(&bf_head);
list_add_tail(&bf->list, &bf_head);
/* setup descriptor */
ds = bf->bf_desc;
ds->ds_link = 0;
ds->ds_data = bf->bf_buf_addr;
/*
* Save the DMA context in the first ath_buf
*/
bf->bf_dmacontext = txctl->dmacontext;
/* Formulate first tx descriptor with tx controls */
/*
* Formulate first tx descriptor with tx controls.
*/
ath9k_hw_set11n_txdesc(ah,
ds,
bf->bf_frmlen, /* frame length */
txctl->atype, /* Atheros packet type */
min(txctl->txpower, (u16)60), /* txpower */
txctl->keyix, /* key cache index */
txctl->keytype, /* key type */
txctl->flags); /* flags */
ath9k_hw_filltxdesc(ah,
ds,
sg_dma_len(sg), /* segment length */
true, /* first segment */
(n_sg == 1) ? true : false, /* last segment */
ds); /* first descriptor */
ath9k_hw_set11n_txdesc(ah, ds, bf->bf_frmlen, frm_type, MAX_RATE_POWER,
bf->bf_keyix, bf->bf_keytype, bf->bf_flags);
ath9k_hw_filltxdesc(ah, ds,
sg_dma_len(sg), /* segment length */
true, /* first segment */
(n_sg == 1) ? true : false, /* last segment */
ds); /* first descriptor */
bf->bf_lastfrm = bf;
(txctl->ht) ?
(bf->bf_state.bf_type |= BUF_HT) :
(bf->bf_state.bf_type &= ~BUF_HT);
spin_lock_bh(&txq->axq_lock);
spin_lock_bh(&txctl->txq->axq_lock);
if (txctl->ht && (sc->sc_flags & SC_OP_TXAGGR)) {
struct ath_atx_tid *tid = ATH_AN_2_TID(an, txctl->tidno);
if (ath_aggr_query(sc, an, txctl->tidno)) {
if (bf_isht(bf) && (sc->sc_flags & SC_OP_TXAGGR)) {
if (ath_aggr_query(sc, an, bf->bf_tidno)) {
/*
* Try aggregation if it's a unicast data frame
* and the destination is HT capable.
*/
ath_tx_send_ampdu(sc, txq, tid, &bf_head, txctl);
ath_tx_send_ampdu(sc, tid, &bf_head, txctl);
} else {
/*
* Send this frame as regular when ADDBA exchange
* is neither complete nor pending.
* Send this frame as regular when ADDBA
* exchange is neither complete nor pending.
*/
ath_tx_send_normal(sc, txq, tid, &bf_head);
ath_tx_send_normal(sc, txctl->txq,
tid, &bf_head);
}
} else {
bf->bf_lastbf = bf;
bf->bf_nframes = 1;
ath_buf_set_rate(sc, bf);
if (ieee80211_is_back_req(fc)) {
/* This is required for resuming tid
* during BAR completion */
bf->bf_tidno = txctl->tidno;
}
ath_tx_txqaddbuf(sc, txq, &bf_head);
ath_tx_txqaddbuf(sc, txctl->txq, &bf_head);
}
spin_unlock_bh(&txq->axq_lock);
return 0;
spin_unlock_bh(&txctl->txq->axq_lock);
}
static void xmit_map_sg(struct ath_softc *sc,
struct sk_buff *skb,
struct ath_tx_control *txctl)
int ath_tx_start(struct ath_softc *sc, struct sk_buff *skb,
struct ath_tx_control *txctl)
{
struct ath_xmit_status tx_status;
struct ath_atx_tid *tid;
struct ath_buf *bf;
struct scatterlist sg;
txctl->dmacontext = pci_map_single(sc->pdev, skb->data,
skb->len, PCI_DMA_TODEVICE);
/* Check if a tx buffer is available */
bf = ath_tx_get_buffer(sc);
if (!bf) {
DPRINTF(sc, ATH_DBG_XMIT, "%s: TX buffers are full\n",
__func__);
return -1;
}
ath_tx_setup_buffer(sc, bf, skb, &sg, txctl);
/* Setup S/G */
/* setup S/G list */
memset(&sg, 0, sizeof(struct scatterlist));
sg_dma_address(&sg) = txctl->dmacontext;
sg_dma_address(&sg) = bf->bf_dmacontext;
sg_dma_len(&sg) = skb->len;
if (ath_tx_start_dma(sc, skb, &sg, 1, txctl) != 0) {
/*
* We have to do drop frame here.
*/
pci_unmap_single(sc->pdev, txctl->dmacontext,
skb->len, PCI_DMA_TODEVICE);
ath_tx_start_dma(sc, bf, &sg, 1, txctl);
tx_status.retries = 0;
tx_status.flags = ATH_TX_ERROR;
if (txctl->ht && (sc->sc_flags & SC_OP_TXAGGR)) {
/* Reclaim the seqno. */
tid = ATH_AN_2_TID((struct ath_node *)
txctl->an, txctl->tidno);
DECR(tid->seq_next, IEEE80211_SEQ_MAX);
}
ath_tx_complete(sc, skb, &tx_status, txctl->an);
}
return 0;
}
/* Initialize TX queue and h/w */
@ -2189,6 +2169,34 @@ int ath_tx_get_qnum(struct ath_softc *sc, int qtype, int haltype)
return qnum;
}
/* Get a transmit queue, if available */
struct ath_txq *ath_test_get_txq(struct ath_softc *sc, struct sk_buff *skb)
{
struct ath_txq *txq = NULL;
int qnum;
qnum = ath_get_hal_qnum(skb_get_queue_mapping(skb), sc);
txq = &sc->sc_txq[qnum];
spin_lock_bh(&txq->axq_lock);
/* Try to avoid running out of descriptors */
if (txq->axq_depth >= (ATH_TXBUF - 20)) {
DPRINTF(sc, ATH_DBG_FATAL,
"%s: TX queue: %d is full, depth: %d\n",
__func__, qnum, txq->axq_depth);
ieee80211_stop_queue(sc->hw, skb_get_queue_mapping(skb));
txq->stopped = 1;
spin_unlock_bh(&txq->axq_lock);
return NULL;
}
spin_unlock_bh(&txq->axq_lock);
return txq;
}
/* Update parameters for a transmit queue */
int ath_txq_update(struct ath_softc *sc, int qnum,
@ -2252,25 +2260,6 @@ int ath_cabq_update(struct ath_softc *sc)
return 0;
}
int ath_tx_start(struct ath_softc *sc, struct sk_buff *skb)
{
struct ath_tx_control txctl;
int error = 0;
memset(&txctl, 0, sizeof(struct ath_tx_control));
error = ath_tx_prepare(sc, skb, &txctl);
if (error == 0)
/*
* Start DMA mapping.
* ath_tx_start_dma() will be called either synchronously
* or asynchrounsly once DMA is complete.
*/
xmit_map_sg(sc, skb, &txctl);
/* failed packets will be dropped by the caller */
return error;
}
/* Deferred processing of transmit interrupt */
void ath_tx_tasklet(struct ath_softc *sc)
@ -2668,6 +2657,8 @@ void ath_tx_cabq(struct ath_softc *sc, struct sk_buff *skb)
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ath_tx_control txctl;
memset(&txctl, 0, sizeof(struct ath_tx_control));
/*
* As a temporary workaround, assign seq# here; this will likely need
* to be cleaned up to work better with Beacon transmission and virtual
@ -2695,22 +2686,18 @@ void ath_tx_cabq(struct ath_softc *sc, struct sk_buff *skb)
memmove(skb->data, skb->data + padsize, hdrlen);
}
txctl.txq = sc->sc_cabq;
DPRINTF(sc, ATH_DBG_XMIT, "%s: transmitting CABQ packet, skb: %p\n",
__func__,
skb);
memset(&txctl, 0, sizeof(struct ath_tx_control));
txctl.flags = ATH9K_TXDESC_CAB;
if (ath_tx_prepare(sc, skb, &txctl) == 0) {
/*
* Start DMA mapping.
* ath_tx_start_dma() will be called either synchronously
* or asynchrounsly once DMA is complete.
*/
xmit_map_sg(sc, skb, &txctl);
} else {
DPRINTF(sc, ATH_DBG_XMIT, "%s: TX CABQ failed\n", __func__);
dev_kfree_skb_any(skb);
if (ath_tx_start(sc, skb, &txctl) != 0) {
DPRINTF(sc, ATH_DBG_XMIT, "%s: TX failed\n", __func__);
goto exit;
}
}
return;
exit:
dev_kfree_skb_any(skb);
}