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ath10k: cleanup HTT TX functions

Browse Source 
Use a saner goto scheme for failure handling. Also
group operations more sensibly.

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 14:43:21 +02:00 committed by Kalle Valo
parent 0a89f8a01d
commit 2f3773bcaf
1 changed files with 69 additions and 74 deletions
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143
drivers/net/wireless/ath/ath10k/htt_tx.c
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@ -315,30 +315,30 @@ int ath10k_htt_mgmt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
res = ath10k_htt_tx_inc_pending(htt);
if (res)
return res;
goto err;
len += sizeof(cmd->hdr);
len += sizeof(cmd->mgmt_tx);
txdesc = ath10k_htc_alloc_skb(len);
if (!txdesc) {
res = -ENOMEM;
goto err;
}
spin_lock_bh(&htt->tx_lock);
msdu_id = ath10k_htt_tx_alloc_msdu_id(htt);
if (msdu_id < 0) {
res = ath10k_htt_tx_alloc_msdu_id(htt);
if (res < 0) {
spin_unlock_bh(&htt->tx_lock);
res = msdu_id;
goto err;
goto err_tx_dec;
}
msdu_id = res;
htt->pending_tx[msdu_id] = msdu;
spin_unlock_bh(&htt->tx_lock);
txdesc = ath10k_htc_alloc_skb(len);
if (!txdesc) {
res = -ENOMEM;
goto err_free_msdu_id;
}
res = ath10k_skb_map(dev, msdu);
if (res)
goto err;
goto err_free_txdesc;
skb_put(txdesc, len);
cmd = (struct htt_cmd *)txdesc->data;
@ -352,22 +352,22 @@ int ath10k_htt_mgmt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
res = ath10k_htc_send(&htt->ar->htc, htt->eid, txdesc);
if (res)
goto err;
goto err_unmap_msdu;
return 0;
err:
err_unmap_msdu:
ath10k_skb_unmap(dev, msdu);
if (txdesc)
dev_kfree_skb_any(txdesc);
if (msdu_id >= 0) {
spin_lock_bh(&htt->tx_lock);
htt->pending_tx[msdu_id] = NULL;
ath10k_htt_tx_free_msdu_id(htt, msdu_id);
spin_unlock_bh(&htt->tx_lock);
}
err_free_txdesc:
dev_kfree_skb_any(txdesc);
err_free_msdu_id:
spin_lock_bh(&htt->tx_lock);
htt->pending_tx[msdu_id] = NULL;
ath10k_htt_tx_free_msdu_id(htt, msdu_id);
spin_unlock_bh(&htt->tx_lock);
err_tx_dec:
ath10k_htt_tx_dec_pending(htt);
err:
return res;
}
@ -379,6 +379,7 @@ int ath10k_htt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)msdu->data;
struct sk_buff *txdesc = NULL;
struct sk_buff *txfrag = NULL;
bool use_frags;
u8 vdev_id = ATH10K_SKB_CB(msdu)->htt.vdev_id;
u8 tid;
int prefetch_len, desc_len, frag_len;
@ -390,7 +391,17 @@ int ath10k_htt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
res = ath10k_htt_tx_inc_pending(htt);
if (res)
return res;
goto err;
spin_lock_bh(&htt->tx_lock);
res = ath10k_htt_tx_alloc_msdu_id(htt);
if (res < 0) {
spin_unlock_bh(&htt->tx_lock);
goto err_tx_dec;
}
msdu_id = res;
htt->pending_tx[msdu_id] = msdu;
spin_unlock_bh(&htt->tx_lock);
prefetch_len = min(htt->prefetch_len, msdu->len);
prefetch_len = roundup(prefetch_len, 4);
@ -401,46 +412,34 @@ int ath10k_htt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
txdesc = ath10k_htc_alloc_skb(desc_len);
if (!txdesc) {
res = -ENOMEM;
goto err;
goto err_free_msdu_id;
}
/* Since HTT 3.0 there is no separate mgmt tx command. However in case
* of mgmt tx using TX_FRM there is not tx fragment list. Instead of tx
* fragment list host driver specifies directly frame pointer. */
if (htt->target_version_major < 3 ||
!ieee80211_is_mgmt(hdr->frame_control)) {
use_frags = htt->target_version_major < 3 ||
!ieee80211_is_mgmt(hdr->frame_control);
if (use_frags) {
txfrag = dev_alloc_skb(frag_len);
if (!txfrag) {
res = -ENOMEM;
goto err;
goto err_free_txdesc;
}
}
if (!IS_ALIGNED((unsigned long)txdesc->data, 4)) {
ath10k_warn("htt alignment check failed. dropping packet.\n");
res = -EIO;
goto err;
goto err_free_txfrag;
}
spin_lock_bh(&htt->tx_lock);
msdu_id = ath10k_htt_tx_alloc_msdu_id(htt);
if (msdu_id < 0) {
spin_unlock_bh(&htt->tx_lock);
res = msdu_id;
goto err;
}
htt->pending_tx[msdu_id] = msdu;
spin_unlock_bh(&htt->tx_lock);
res = ath10k_skb_map(dev, msdu);
if (res)
goto err;
goto err_free_txfrag;
/* Since HTT 3.0 there is no separate mgmt tx command. However in case
* of mgmt tx using TX_FRM there is not tx fragment list. Instead of tx
* fragment list host driver specifies directly frame pointer. */
if (htt->target_version_major < 3 ||
!ieee80211_is_mgmt(hdr->frame_control)) {
if (use_frags) {
/* tx fragment list must be terminated with zero-entry */
skb_put(txfrag, frag_len);
tx_frags = (struct htt_data_tx_desc_frag *)txfrag->data;
@ -451,7 +450,7 @@ int ath10k_htt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
res = ath10k_skb_map(dev, txfrag);
if (res)
goto err;
goto err_unmap_msdu;
ath10k_dbg(ATH10K_DBG_HTT, "txfrag 0x%llx\n",
(unsigned long long) ATH10K_SKB_CB(txfrag)->paddr);
@ -476,15 +475,11 @@ int ath10k_htt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
flags0 |= HTT_DATA_TX_DESC_FLAGS0_NO_ENCRYPT;
flags0 |= HTT_DATA_TX_DESC_FLAGS0_MAC_HDR_PRESENT;
/* Since HTT 3.0 there is no separate mgmt tx command. However in case
* of mgmt tx using TX_FRM there is not tx fragment list. Instead of tx
* fragment list host driver specifies directly frame pointer. */
if (htt->target_version_major >= 3 &&
ieee80211_is_mgmt(hdr->frame_control))
flags0 |= SM(ATH10K_HW_TXRX_MGMT,
if (use_frags)
flags0 |= SM(ATH10K_HW_TXRX_NATIVE_WIFI,
HTT_DATA_TX_DESC_FLAGS0_PKT_TYPE);
else
flags0 |= SM(ATH10K_HW_TXRX_NATIVE_WIFI,
flags0 |= SM(ATH10K_HW_TXRX_MGMT,
HTT_DATA_TX_DESC_FLAGS0_PKT_TYPE);
flags1 = 0;
@ -493,14 +488,10 @@ int ath10k_htt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
flags1 |= HTT_DATA_TX_DESC_FLAGS1_CKSUM_L3_OFFLOAD;
flags1 |= HTT_DATA_TX_DESC_FLAGS1_CKSUM_L4_OFFLOAD;
/* Since HTT 3.0 there is no separate mgmt tx command. However in case
* of mgmt tx using TX_FRM there is not tx fragment list. Instead of tx
* fragment list host driver specifies directly frame pointer. */
if (htt->target_version_major >= 3 &&
ieee80211_is_mgmt(hdr->frame_control))
frags_paddr = ATH10K_SKB_CB(msdu)->paddr;
else
if (use_frags)
frags_paddr = ATH10K_SKB_CB(txfrag)->paddr;
else
frags_paddr = ATH10K_SKB_CB(msdu)->paddr;
cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_TX_FRM;
cmd->data_tx.flags0 = flags0;
@ -514,23 +505,27 @@ int ath10k_htt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
res = ath10k_htc_send(&htt->ar->htc, htt->eid, txdesc);
if (res)
goto err;
goto err_restore;
return 0;
err:
if (txfrag)
err_restore:
if (use_frags)
ath10k_skb_unmap(dev, txfrag);
if (txdesc)
dev_kfree_skb_any(txdesc);
if (txfrag)
dev_kfree_skb_any(txfrag);
if (msdu_id >= 0) {
spin_lock_bh(&htt->tx_lock);
htt->pending_tx[msdu_id] = NULL;
ath10k_htt_tx_free_msdu_id(htt, msdu_id);
spin_unlock_bh(&htt->tx_lock);
}
ath10k_htt_tx_dec_pending(htt);
err_unmap_msdu:
ath10k_skb_unmap(dev, msdu);
err_free_txfrag:
if (use_frags)
dev_kfree_skb_any(txfrag);
err_free_txdesc:
dev_kfree_skb_any(txdesc);
err_free_msdu_id:
spin_lock_bh(&htt->tx_lock);
htt->pending_tx[msdu_id] = NULL;
ath10k_htt_tx_free_msdu_id(htt, msdu_id);
spin_unlock_bh(&htt->tx_lock);
err_tx_dec:
ath10k_htt_tx_dec_pending(htt);
err:
return res;
}