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ath10k: decouple HTT TX completions

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Until now the all MSDU transfer related structures
were freed when all resources were unreferenced.

Now HTC transfer is freed independently and HTT
transfer is so too.

This yields a way more simpler ath10k_skb_cb and
should possibly enable parallel pipe processing
(which is now serialized in
ath10k_pci_process_ce routine).

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Michal Kazior 2013-09-18 14:43:20 +02:00 committed by Kalle Valo
parent 27bb178dae
commit 0a89f8a01d
6 changed files with 27 additions and 108 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/wireless/ath/ath10k/core.h
View File

@ -52,18 +52,10 @@ struct ath10k_skb_cb {
struct {
u8 vdev_id;
u16 msdu_id;
u8 tid;
bool is_offchan;
bool is_conf;
bool discard;
bool no_ack;
u8 refcount;
struct sk_buff *txfrag;
struct sk_buff *msdu;
} __packed htt;
/* 4 bytes left on 64bit arch */
} __packed;
static inline struct ath10k_skb_cb *ATH10K_SKB_CB(struct sk_buff *skb)

4
drivers/net/wireless/ath/ath10k/htt_rx.c
View File

@ -1140,7 +1140,7 @@ void ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
break;
}
ath10k_txrx_tx_completed(htt, &tx_done);
ath10k_txrx_tx_unref(htt, &tx_done);
break;
}
case HTT_T2H_MSG_TYPE_TX_COMPL_IND: {
@ -1174,7 +1174,7 @@ void ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
for (i = 0; i < resp->data_tx_completion.num_msdus; i++) {
msdu_id = resp->data_tx_completion.msdus[i];
tx_done.msdu_id = __le16_to_cpu(msdu_id);
ath10k_txrx_tx_completed(htt, &tx_done);
ath10k_txrx_tx_unref(htt, &tx_done);
}
break;
}

64
drivers/net/wireless/ath/ath10k/htt_tx.c
View File

@ -117,7 +117,7 @@ int ath10k_htt_tx_attach(struct ath10k_htt *htt)
static void ath10k_htt_tx_cleanup_pending(struct ath10k_htt *htt)
{
struct sk_buff *txdesc;
struct htt_tx_done tx_done = {0};
int msdu_id;
/* No locks needed. Called after communication with the device has
@ -127,18 +127,13 @@ static void ath10k_htt_tx_cleanup_pending(struct ath10k_htt *htt)
if (!test_bit(msdu_id, htt->used_msdu_ids))
continue;
txdesc = htt->pending_tx[msdu_id];
if (!txdesc)
continue;
ath10k_dbg(ATH10K_DBG_HTT, "force cleanup msdu_id %hu\n",
msdu_id);
if (ATH10K_SKB_CB(txdesc)->htt.refcount > 0)
ATH10K_SKB_CB(txdesc)->htt.refcount = 1;
tx_done.discard = 1;
tx_done.msdu_id = msdu_id;
ATH10K_SKB_CB(txdesc)->htt.discard = true;
ath10k_txrx_tx_unref(htt, txdesc);
ath10k_txrx_tx_unref(htt, &tx_done);
}
}
@ -152,26 +147,7 @@ void ath10k_htt_tx_detach(struct ath10k_htt *htt)
void ath10k_htt_htc_tx_complete(struct ath10k *ar, struct sk_buff *skb)
{
struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
struct ath10k_htt *htt = &ar->htt;
if (skb_cb->htt.is_conf) {
dev_kfree_skb_any(skb);
return;
}
if (skb_cb->is_aborted) {
skb_cb->htt.discard = true;
/* if the skbuff is aborted we need to make sure we'll free up
* the tx resources, we can't simply run tx_unref() 2 times
* because if htt tx completion came in earlier we'd access
* unallocated memory */
if (skb_cb->htt.refcount > 1)
skb_cb->htt.refcount = 1;
}
ath10k_txrx_tx_unref(htt, skb);
dev_kfree_skb_any(skb);
}
int ath10k_htt_h2t_ver_req_msg(struct ath10k_htt *htt)
@ -192,8 +168,6 @@ int ath10k_htt_h2t_ver_req_msg(struct ath10k_htt *htt)
cmd = (struct htt_cmd *)skb->data;
cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_VERSION_REQ;
ATH10K_SKB_CB(skb)->htt.is_conf = true;
ret = ath10k_htc_send(&htt->ar->htc, htt->eid, skb);
if (ret) {
dev_kfree_skb_any(skb);
@ -233,8 +207,6 @@ int ath10k_htt_h2t_stats_req(struct ath10k_htt *htt, u8 mask, u64 cookie)
req->cookie_lsb = cpu_to_le32(cookie & 0xffffffff);
req->cookie_msb = cpu_to_le32((cookie & 0xffffffff00000000ULL) >> 32);
ATH10K_SKB_CB(skb)->htt.is_conf = true;
ret = ath10k_htc_send(&htt->ar->htc, htt->eid, skb);
if (ret) {
ath10k_warn("failed to send htt type stats request: %d", ret);
@ -321,8 +293,6 @@ int ath10k_htt_send_rx_ring_cfg_ll(struct ath10k_htt *htt)
#undef desc_offset
ATH10K_SKB_CB(skb)->htt.is_conf = true;
ret = ath10k_htc_send(&htt->ar->htc, htt->eid, skb);
if (ret) {
dev_kfree_skb_any(skb);
@ -335,7 +305,6 @@ int ath10k_htt_send_rx_ring_cfg_ll(struct ath10k_htt *htt)
int ath10k_htt_mgmt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
{
struct device *dev = htt->ar->dev;
struct ath10k_skb_cb *skb_cb;
struct sk_buff *txdesc = NULL;
struct htt_cmd *cmd;
u8 vdev_id = ATH10K_SKB_CB(msdu)->htt.vdev_id;
@ -364,7 +333,7 @@ int ath10k_htt_mgmt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
res = msdu_id;
goto err;
}
htt->pending_tx[msdu_id] = txdesc;
htt->pending_tx[msdu_id] = msdu;
spin_unlock_bh(&htt->tx_lock);
res = ath10k_skb_map(dev, msdu);
@ -381,15 +350,6 @@ int ath10k_htt_mgmt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
memcpy(cmd->mgmt_tx.hdr, msdu->data,
min_t(int, msdu->len, HTT_MGMT_FRM_HDR_DOWNLOAD_LEN));
/* refcount is decremented by HTC and HTT completions until it reaches
* zero and is freed */
skb_cb = ATH10K_SKB_CB(txdesc);
skb_cb->htt.is_conf = false;
skb_cb->htt.msdu_id = msdu_id;
skb_cb->htt.refcount = 2;
skb_cb->htt.msdu = msdu;
skb_cb->htt.txfrag = NULL;
res = ath10k_htc_send(&htt->ar->htc, htt->eid, txdesc);
if (res)
goto err;
@ -417,7 +377,6 @@ int ath10k_htt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
struct htt_cmd *cmd;
struct htt_data_tx_desc_frag *tx_frags;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)msdu->data;
struct ath10k_skb_cb *skb_cb;
struct sk_buff *txdesc = NULL;
struct sk_buff *txfrag = NULL;
u8 vdev_id = ATH10K_SKB_CB(msdu)->htt.vdev_id;
@ -470,7 +429,7 @@ int ath10k_htt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
res = msdu_id;
goto err;
}
htt->pending_tx[msdu_id] = txdesc;
htt->pending_tx[msdu_id] = msdu;
spin_unlock_bh(&htt->tx_lock);
res = ath10k_skb_map(dev, msdu);
@ -553,15 +512,6 @@ int ath10k_htt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
memcpy(cmd->data_tx.prefetch, msdu->data, prefetch_len);
/* refcount is decremented by HTC and HTT completions until it reaches
* zero and is freed */
skb_cb = ATH10K_SKB_CB(txdesc);
skb_cb->htt.is_conf = false;
skb_cb->htt.msdu_id = msdu_id;
skb_cb->htt.refcount = 2;
skb_cb->htt.txfrag = txfrag;
skb_cb->htt.msdu = msdu;
res = ath10k_htc_send(&htt->ar->htc, htt->eid, txdesc);
if (res)
goto err;

2
drivers/net/wireless/ath/ath10k/mac.c
View File

@ -1757,8 +1757,6 @@ static void ath10k_tx(struct ieee80211_hw *hw,
ath10k_tx_h_seq_no(skb);
}
ATH10K_SKB_CB(skb)->is_mapped = false;
ATH10K_SKB_CB(skb)->is_aborted = false;
ATH10K_SKB_CB(skb)->htt.is_offchan = false;
ATH10K_SKB_CB(skb)->htt.vdev_id = vdev_id;
ATH10K_SKB_CB(skb)->htt.tid = tid;

52
drivers/net/wireless/ath/ath10k/txrx.c
View File

@ -44,21 +44,25 @@ static void ath10k_report_offchan_tx(struct ath10k *ar, struct sk_buff *skb)
spin_unlock_bh(&ar->data_lock);
}
void ath10k_txrx_tx_unref(struct ath10k_htt *htt, struct sk_buff *txdesc)
void ath10k_txrx_tx_unref(struct ath10k_htt *htt,
const struct htt_tx_done *tx_done)
{
struct device *dev = htt->ar->dev;
struct ieee80211_tx_info *info;
struct sk_buff *txfrag = ATH10K_SKB_CB(txdesc)->htt.txfrag;
struct sk_buff *msdu = ATH10K_SKB_CB(txdesc)->htt.msdu;
struct sk_buff *msdu, *txfrag;
int ret;
if (ATH10K_SKB_CB(txdesc)->htt.refcount == 0)
return;
ath10k_dbg(ATH10K_DBG_HTT, "htt tx completion msdu_id %u discard %d no_ack %d\n",
tx_done->msdu_id, !!tx_done->discard, !!tx_done->no_ack);
ATH10K_SKB_CB(txdesc)->htt.refcount--;
if (ATH10K_SKB_CB(txdesc)->htt.refcount > 0)
if (tx_done->msdu_id >= htt->max_num_pending_tx) {
ath10k_warn("warning: msdu_id %d too big, ignoring\n",
tx_done->msdu_id);
return;
}
msdu = htt->pending_tx[tx_done->msdu_id];
txfrag = ATH10K_SKB_CB(msdu)->htt.txfrag;
if (txfrag) {
ret = ath10k_skb_unmap(dev, txfrag);
@ -76,7 +80,7 @@ void ath10k_txrx_tx_unref(struct ath10k_htt *htt, struct sk_buff *txdesc)
info = IEEE80211_SKB_CB(msdu);
if (ATH10K_SKB_CB(txdesc)->htt.discard) {
if (tx_done->discard) {
ieee80211_free_txskb(htt->ar->hw, msdu);
goto exit;
}
@ -84,7 +88,7 @@ void ath10k_txrx_tx_unref(struct ath10k_htt *htt, struct sk_buff *txdesc)
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
info->flags |= IEEE80211_TX_STAT_ACK;
if (ATH10K_SKB_CB(txdesc)->htt.no_ack)
if (tx_done->no_ack)
info->flags &= ~IEEE80211_TX_STAT_ACK;
ieee80211_tx_status(htt->ar->hw, msdu);
@ -92,36 +96,12 @@ void ath10k_txrx_tx_unref(struct ath10k_htt *htt, struct sk_buff *txdesc)
exit:
spin_lock_bh(&htt->tx_lock);
htt->pending_tx[ATH10K_SKB_CB(txdesc)->htt.msdu_id] = NULL;
ath10k_htt_tx_free_msdu_id(htt, ATH10K_SKB_CB(txdesc)->htt.msdu_id);
htt->pending_tx[tx_done->msdu_id] = NULL;
ath10k_htt_tx_free_msdu_id(htt, tx_done->msdu_id);
__ath10k_htt_tx_dec_pending(htt);
if (htt->num_pending_tx == 0)
wake_up(&htt->empty_tx_wq);
spin_unlock_bh(&htt->tx_lock);
dev_kfree_skb_any(txdesc);
}
void ath10k_txrx_tx_completed(struct ath10k_htt *htt,
const struct htt_tx_done *tx_done)
{
struct sk_buff *txdesc;
ath10k_dbg(ATH10K_DBG_HTT, "htt tx completion msdu_id %u discard %d no_ack %d\n",
tx_done->msdu_id, !!tx_done->discard, !!tx_done->no_ack);
if (tx_done->msdu_id >= htt->max_num_pending_tx) {
ath10k_warn("warning: msdu_id %d too big, ignoring\n",
tx_done->msdu_id);
return;
}
txdesc = htt->pending_tx[tx_done->msdu_id];
ATH10K_SKB_CB(txdesc)->htt.discard = tx_done->discard;
ATH10K_SKB_CB(txdesc)->htt.no_ack = tx_done->no_ack;
ath10k_txrx_tx_unref(htt, txdesc);
}
static const u8 rx_legacy_rate_idx[] = {

5
drivers/net/wireless/ath/ath10k/txrx.h
View File

@ -19,9 +19,8 @@
#include "htt.h"
void ath10k_txrx_tx_unref(struct ath10k_htt *htt, struct sk_buff *txdesc);
void ath10k_txrx_tx_completed(struct ath10k_htt *htt,
const struct htt_tx_done *tx_done);
void ath10k_txrx_tx_unref(struct ath10k_htt *htt,
const struct htt_tx_done *tx_done);
void ath10k_process_rx(struct ath10k *ar, struct htt_rx_info *info);
struct ath10k_peer *ath10k_peer_find(struct ath10k *ar, int vdev_id,