static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
struct sk_buff *skb)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
u8 *rxdesc = skb->data;
struct ieee80211_hdr *hdr;
bool unicast = false;
__le16 fc;
struct ieee80211_rx_status rx_status = {0};
struct rtl_stats stats = {
.signal = 0,
.rate = 0,
};
skb_pull(skb, RTL_RX_DESC_SIZE);
rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
hdr = (struct ieee80211_hdr *)(skb->data);
fc = hdr->frame_control;
memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
if (is_broadcast_ether_addr(hdr->addr1)) {
/*TODO*/;
} else if (is_multicast_ether_addr(hdr->addr1)) {
/*TODO*/
} else {
unicast = true;
}
if (!stats.crc) {
if (unicast) {
rtlpriv->link_info.num_rx_inperiod++;
rtlpriv->stats.rxbytesunicast += skb->len;
}
/* static bcn for roaming */
rtl_beacon_statistic(hw, skb);
if (likely(rtl_action_proc(hw, skb, false)))
return;
}
}
static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
struct sk_buff *skb)
{
_rtl_usb_rx_process_agg(hw, skb);
ieee80211_rx(hw, skb);
}
static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
struct sk_buff *skb)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
u8 *rxdesc = skb->data;
struct ieee80211_hdr *hdr;
bool unicast = false;
__le16 fc;
struct ieee80211_rx_status rx_status = {0};
struct rtl_stats stats = {
.signal = 0,
.rate = 0,
};
skb_pull(skb, RTL_RX_DESC_SIZE);
rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
hdr = (struct ieee80211_hdr *)(skb->data);
fc = hdr->frame_control;
if (!stats.crc) {
memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
if (is_broadcast_ether_addr(hdr->addr1)) {
/*TODO*/;
} else if (is_multicast_ether_addr(hdr->addr1)) {
/*TODO*/
} else {
unicast = true;
rtlpriv->stats.rxbytesunicast += skb->len;
}
if (ieee80211_is_data(fc)) {
rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
if (unicast)
rtlpriv->link_info.num_rx_inperiod++;
}
/* static bcn for roaming */
rtl_beacon_statistic(hw, skb);
}
}
static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
struct sk_buff *skb)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
u8 *rxdesc = skb->data;
struct ieee80211_hdr *hdr;
bool unicast = false;
__le16 fc;
struct ieee80211_rx_status rx_status = {0};
struct rtl_stats stats = {
.signal = 0,
.rate = 0,
};
skb_pull(skb, RTL_RX_DESC_SIZE);
rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
hdr = (struct ieee80211_hdr *)(skb->data);
fc = hdr->frame_control;
if (!stats.crc) {
memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
if (is_broadcast_ether_addr(hdr->addr1)) {
/*TODO*/;
} else if (is_multicast_ether_addr(hdr->addr1)) {
/*TODO*/
} else {
unicast = true;
rtlpriv->stats.rxbytesunicast += skb->len;
}
if (ieee80211_is_data(fc)) {
rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
if (unicast)
rtlpriv->link_info.num_rx_inperiod++;
}
/* static bcn for roaming */
rtl_beacon_statistic(hw, skb);
if (likely(rtl_action_proc(hw, skb, false)))
ieee80211_rx(hw, skb);
else
dev_kfree_skb_any(skb);
}
}
static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct sk_buff *_skb;
struct sk_buff_head rx_queue;
struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
skb_queue_head_init(&rx_queue);
if (rtlusb->usb_rx_segregate_hdl)
rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
WARN_ON(skb_queue_empty(&rx_queue));
while (!skb_queue_empty(&rx_queue)) {
_skb = skb_dequeue(&rx_queue);
_rtl_usb_rx_process_agg(hw, _skb);
ieee80211_rx(hw, _skb);
}
}
#define __RX_SKB_MAX_QUEUED 64
static void _rtl_rx_work(unsigned long param)
{
struct rtl_usb *rtlusb = (struct rtl_usb *)param;
struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
struct sk_buff *skb;
while ((skb = skb_dequeue(&rtlusb->rx_queue))) {
if (unlikely(IS_USB_STOP(rtlusb))) {
dev_kfree_skb_any(skb);
continue;
}
if (likely(!rtlusb->usb_rx_segregate_hdl)) {
_rtl_usb_rx_process_noagg(hw, skb);
} else {
/* TO DO */
_rtl_rx_pre_process(hw, skb);
pr_err("rx agg not supported\n");
}
}
}
static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr,
unsigned int len)
{
#if NET_IP_ALIGN != 0
unsigned int padding = 0;
#endif
/* make function no-op when possible */
if (NET_IP_ALIGN == 0 || len < sizeof(*hdr))
return 0;
#if NET_IP_ALIGN != 0
/* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */
/* TODO: deduplicate common code, define helper function instead? */
if (ieee80211_is_data_qos(hdr->frame_control)) {
u8 *qc = ieee80211_get_qos_ctl(hdr);
padding ^= NET_IP_ALIGN;
/* Input might be invalid, avoid accessing memory outside
* the buffer.
*/
if ((unsigned long)qc - (unsigned long)hdr < len &&
*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
padding ^= NET_IP_ALIGN;
}
if (ieee80211_has_a4(hdr->frame_control))
padding ^= NET_IP_ALIGN;
return padding;
#endif
}
#define __RADIO_TAP_SIZE_RSV 32
static void _rtl_rx_completed(struct urb *_urb)
{
struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context;
struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
struct rtl_priv *rtlpriv = rtl_priv(hw);
int err = 0;
if (unlikely(IS_USB_STOP(rtlusb)))
goto free;
if (likely(0 == _urb->status)) {
unsigned int padding;
struct sk_buff *skb;
unsigned int qlen;
unsigned int size = _urb->actual_length;
struct ieee80211_hdr *hdr;
if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) {
RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
"Too short packet from bulk IN! (len: %d)\n",
size);
goto resubmit;
}
qlen = skb_queue_len(&rtlusb->rx_queue);
if (qlen >= __RX_SKB_MAX_QUEUED) {
RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
"Pending RX skbuff queue full! (qlen: %d)\n",
qlen);
goto resubmit;
}
hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE);
padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE);
skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding);
if (!skb) {
RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
"Can't allocate skb for bulk IN!\n");
goto resubmit;
}
_rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
/* Make sure the payload data is 4 byte aligned. */
skb_reserve(skb, padding);
/* reserve some space for mac80211's radiotap */
skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
memcpy(skb_put(skb, size), _urb->transfer_buffer, size);
skb_queue_tail(&rtlusb->rx_queue, skb);
tasklet_schedule(&rtlusb->rx_work_tasklet);
goto resubmit;
}
switch (_urb->status) {
/* disconnect */
case -ENOENT:
case -ECONNRESET:
case -ENODEV:
case -ESHUTDOWN:
goto free;
default:
break;
}
resubmit:
usb_anchor_urb(_urb, &rtlusb->rx_submitted);
err = usb_submit_urb(_urb, GFP_ATOMIC);
if (unlikely(err)) {
usb_unanchor_urb(_urb);
goto free;
}
return;
free:
/* On some architectures, usb_free_coherent must not be called from
* hardirq context. Queue urb to cleanup list.
*/
usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs);
}
#undef __RADIO_TAP_SIZE_RSV
static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
struct urb *urb;
usb_kill_anchored_urbs(&rtlusb->rx_submitted);
tasklet_kill(&rtlusb->rx_work_tasklet);
cancel_work_sync(&rtlpriv->works.lps_change_work);
flush_workqueue(rtlpriv->works.rtl_wq);
destroy_workqueue(rtlpriv->works.rtl_wq);
skb_queue_purge(&rtlusb->rx_queue);
while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
usb_free_coherent(urb->dev, urb->transfer_buffer_length,
urb->transfer_buffer, urb->transfer_dma);
usb_free_urb(urb);
}
}
static int _rtl_usb_receive(struct ieee80211_hw *hw)
{
struct urb *urb;
int err;
int i;
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
WARN_ON(0 == rtlusb->rx_urb_num);
/* 1600 == 1514 + max WLAN header + rtk info */
WARN_ON(rtlusb->rx_max_size < 1600);
for (i = 0; i < rtlusb->rx_urb_num; i++) {
err = -ENOMEM;
urb = usb_alloc_urb(0, GFP_KERNEL);
if (!urb) {
RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
"Failed to alloc URB!!\n");
goto err_out;
}
err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
if (err < 0) {
RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
"Failed to prep_rx_urb!!\n");
usb_free_urb(urb);
goto err_out;
}
usb_anchor_urb(urb, &rtlusb->rx_submitted);
err = usb_submit_urb(urb, GFP_KERNEL);
if (err)
goto err_out;
usb_free_urb(urb);
}
return 0;
err_out:
usb_kill_anchored_urbs(&rtlusb->rx_submitted);
_rtl_usb_cleanup_rx(hw);
return err;
}
static int rtl_usb_start(struct ieee80211_hw *hw)
{
int err;
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
err = rtlpriv->cfg->ops->hw_init(hw);
if (!err) {
rtl_init_rx_config(hw);
/* Enable software */
SET_USB_START(rtlusb);
/* should after adapter start and interrupt enable. */
set_hal_start(rtlhal);
/* Start bulk IN */
err = _rtl_usb_receive(hw);
}
return err;
}