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// SPDX-License-Identifier: BSD-3-Clause-Clear
/*
* Copyright (c) 2018-2021 The Linux Foundation. All rights reserved.
* Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
*/
#include "core.h"
#include "dp_tx.h"
#include "debug.h"
#include "debugfs.h"
#include "hw.h"
#include "peer.h"
#include "mac.h"
enum hal_tcl_encap_type
ath12k_dp_tx_get_encap_type(struct ath12k_base *ab, struct sk_buff *skb)
{
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
if (test_bit(ATH12K_FLAG_RAW_MODE, &ab->dev_flags))
return HAL_TCL_ENCAP_TYPE_RAW;
if (tx_info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)
return HAL_TCL_ENCAP_TYPE_ETHERNET;
return HAL_TCL_ENCAP_TYPE_NATIVE_WIFI;
}
EXPORT_SYMBOL(ath12k_dp_tx_get_encap_type);
void ath12k_dp_tx_encap_nwifi(struct sk_buff *skb)
{
struct ieee80211_hdr *hdr = (void *)skb->data;
u8 *qos_ctl;
if (!ieee80211_is_data_qos(hdr->frame_control))
return;
qos_ctl = ieee80211_get_qos_ctl(hdr);
memmove(skb->data + IEEE80211_QOS_CTL_LEN,
skb->data, (void *)qos_ctl - (void *)skb->data);
skb_pull(skb, IEEE80211_QOS_CTL_LEN);
hdr = (void *)skb->data;
hdr->frame_control &= ~__cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
}
EXPORT_SYMBOL(ath12k_dp_tx_encap_nwifi);
u8 ath12k_dp_tx_get_tid(struct sk_buff *skb)
{
struct ieee80211_hdr *hdr = (void *)skb->data;
struct ath12k_skb_cb *cb = ATH12K_SKB_CB(skb);
if (cb->flags & ATH12K_SKB_HW_80211_ENCAP)
return skb->priority & IEEE80211_QOS_CTL_TID_MASK;
else if (!ieee80211_is_data_qos(hdr->frame_control))
return HAL_DESC_REO_NON_QOS_TID;
else
return skb->priority & IEEE80211_QOS_CTL_TID_MASK;
}
EXPORT_SYMBOL(ath12k_dp_tx_get_tid);
enum hal_encrypt_type ath12k_dp_tx_get_encrypt_type(u32 cipher)
{
switch (cipher) {
case WLAN_CIPHER_SUITE_WEP40:
return HAL_ENCRYPT_TYPE_WEP_40;
case WLAN_CIPHER_SUITE_WEP104:
return HAL_ENCRYPT_TYPE_WEP_104;
case WLAN_CIPHER_SUITE_TKIP:
return HAL_ENCRYPT_TYPE_TKIP_MIC;
case WLAN_CIPHER_SUITE_CCMP:
return HAL_ENCRYPT_TYPE_CCMP_128;
case WLAN_CIPHER_SUITE_CCMP_256:
return HAL_ENCRYPT_TYPE_CCMP_256;
case WLAN_CIPHER_SUITE_GCMP:
return HAL_ENCRYPT_TYPE_GCMP_128;
case WLAN_CIPHER_SUITE_GCMP_256:
return HAL_ENCRYPT_TYPE_AES_GCMP_256;
default:
return HAL_ENCRYPT_TYPE_OPEN;
}
}
EXPORT_SYMBOL(ath12k_dp_tx_get_encrypt_type);
void ath12k_dp_tx_release_txbuf(struct ath12k_dp *dp,
struct ath12k_tx_desc_info *tx_desc,
u8 pool_id)
{
spin_lock_bh(&dp->tx_desc_lock[pool_id]);
tx_desc->skb_ext_desc = NULL;
list_move_tail(&tx_desc->list, &dp->tx_desc_free_list[pool_id]);
spin_unlock_bh(&dp->tx_desc_lock[pool_id]);
}
EXPORT_SYMBOL(ath12k_dp_tx_release_txbuf);
struct ath12k_tx_desc_info *ath12k_dp_tx_assign_buffer(struct ath12k_dp *dp,
u8 pool_id)
{
struct ath12k_tx_desc_info *desc;
spin_lock_bh(&dp->tx_desc_lock[pool_id]);
desc = list_first_entry_or_null(&dp->tx_desc_free_list[pool_id],
struct ath12k_tx_desc_info,
list);
if (!desc) {
spin_unlock_bh(&dp->tx_desc_lock[pool_id]);
ath12k_warn(dp->ab, "failed to allocate data Tx buffer\n");
return NULL;
}
list_move_tail(&desc->list, &dp->tx_desc_used_list[pool_id]);
spin_unlock_bh(&dp->tx_desc_lock[pool_id]);
return desc;
}
EXPORT_SYMBOL(ath12k_dp_tx_assign_buffer);
void *ath12k_dp_metadata_align_skb(struct sk_buff *skb, u8 tail_len)
{
struct sk_buff *tail;
void *metadata;
if (unlikely(skb_cow_data(skb, tail_len, &tail) < 0))
return NULL;
metadata = pskb_put(skb, tail, tail_len);
memset(metadata, 0, tail_len);
return metadata;
}
EXPORT_SYMBOL(ath12k_dp_metadata_align_skb);
static void ath12k_dp_tx_move_payload(struct sk_buff *skb,
unsigned long delta,
bool head)
{
unsigned long len = skb->len;
if (head) {
skb_push(skb, delta);
memmove(skb->data, skb->data + delta, len);
skb_trim(skb, len);
} else {
skb_put(skb, delta);
memmove(skb->data + delta, skb->data, len);
skb_pull(skb, delta);
}
}
int ath12k_dp_tx_align_payload(struct ath12k_dp *dp, struct sk_buff **pskb)
{
u32 iova_mask = dp->hw_params->iova_mask;
unsigned long offset, delta1, delta2;
struct sk_buff *skb2, *skb = *pskb;
unsigned int headroom = skb_headroom(skb);
int tailroom = skb_tailroom(skb);
int ret = 0;
offset = (unsigned long)skb->data & iova_mask;
delta1 = offset;
delta2 = iova_mask - offset + 1;
if (headroom >= delta1) {
ath12k_dp_tx_move_payload(skb, delta1, true);
} else if (tailroom >= delta2) {
ath12k_dp_tx_move_payload(skb, delta2, false);
} else {
skb2 = skb_realloc_headroom(skb, iova_mask);
if (!skb2) {
ret = -ENOMEM;
goto out;
}
dev_kfree_skb_any(skb);
offset = (unsigned long)skb2->data & iova_mask;
if (offset)
ath12k_dp_tx_move_payload(skb2, offset, true);
*pskb = skb2;
}
out:
return ret;
}
EXPORT_SYMBOL(ath12k_dp_tx_align_payload);
void ath12k_dp_tx_free_txbuf(struct ath12k_dp *dp,
struct dp_tx_ring *tx_ring,
struct ath12k_tx_desc_params *desc_params)
{
struct ath12k_pdev_dp *dp_pdev;
struct sk_buff *msdu = desc_params->skb;
struct ath12k_skb_cb *skb_cb;
u8 pdev_idx = ath12k_hw_mac_id_to_pdev_id(dp->hw_params, desc_params->mac_id);
skb_cb = ATH12K_SKB_CB(msdu);
dma_unmap_single(dp->dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
if (skb_cb->paddr_ext_desc) {
dma_unmap_single(dp->dev, skb_cb->paddr_ext_desc,
desc_params->skb_ext_desc->len, DMA_TO_DEVICE);
dev_kfree_skb_any(desc_params->skb_ext_desc);
}
guard(rcu)();
dp_pdev = ath12k_dp_to_pdev_dp(dp, pdev_idx);
ieee80211_free_txskb(ath12k_pdev_dp_to_hw(dp_pdev), msdu);
if (atomic_dec_and_test(&dp_pdev->num_tx_pending))
wake_up(&dp_pdev->tx_empty_waitq);
}
EXPORT_SYMBOL(ath12k_dp_tx_free_txbuf);
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