rtlwifi: usb: defer rx processing to tasklet
Move processing of received packets to tasklet from hard-irq context. Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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d7d0f081c4
commit
29bb7013a5
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@ -434,7 +434,7 @@ static void _rtl_rx_process(struct ieee80211_hw *hw, struct sk_buff *skb)
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(u32)hdr->addr1[2], (u32)hdr->addr1[3],
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(u32)hdr->addr1[4], (u32)hdr->addr1[5]);
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memcpy(IEEE80211_SKB_RXCB(skb), rx_status, sizeof(*rx_status));
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ieee80211_rx_irqsafe(hw, skb);
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ieee80211_rx(hw, skb);
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}
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void rtl8192cu_rx_hdl(struct ieee80211_hw *hw, struct sk_buff * skb)
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@ -308,6 +308,8 @@ static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
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return 0;
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}
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static void _rtl_rx_work(unsigned long param);
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static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
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{
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struct rtl_priv *rtlpriv = rtl_priv(hw);
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@ -325,6 +327,11 @@ static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
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rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
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init_usb_anchor(&rtlusb->rx_submitted);
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init_usb_anchor(&rtlusb->rx_cleanup_urbs);
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skb_queue_head_init(&rtlusb->rx_queue);
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rtlusb->rx_work_tasklet.func = _rtl_rx_work;
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rtlusb->rx_work_tasklet.data = (unsigned long)rtlusb;
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return 0;
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}
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@ -515,7 +522,7 @@ static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
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}
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if (likely(rtl_action_proc(hw, skb, false)))
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ieee80211_rx_irqsafe(hw, skb);
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ieee80211_rx(hw, skb);
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else
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dev_kfree_skb_any(skb);
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}
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@ -534,7 +541,31 @@ static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
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while (!skb_queue_empty(&rx_queue)) {
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_skb = skb_dequeue(&rx_queue);
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_rtl_usb_rx_process_agg(hw, _skb);
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ieee80211_rx_irqsafe(hw, _skb);
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ieee80211_rx(hw, _skb);
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}
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}
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#define __RX_SKB_MAX_QUEUED 32
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static void _rtl_rx_work(unsigned long param)
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{
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struct rtl_usb *rtlusb = (struct rtl_usb *)param;
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struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
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struct sk_buff *skb;
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while ((skb = skb_dequeue(&rtlusb->rx_queue))) {
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if (unlikely(IS_USB_STOP(rtlusb))) {
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dev_kfree_skb_any(skb);
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continue;
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}
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if (likely(!rtlusb->usb_rx_segregate_hdl)) {
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_rtl_usb_rx_process_noagg(hw, skb);
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} else {
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/* TO DO */
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_rtl_rx_pre_process(hw, skb);
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pr_err("rx agg not supported\n");
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}
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}
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}
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@ -552,6 +583,7 @@ static void _rtl_rx_completed(struct urb *_urb)
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if (likely(0 == _urb->status)) {
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struct sk_buff *skb;
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unsigned int qlen;
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unsigned int size = _urb->actual_length;
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if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) {
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@ -561,6 +593,14 @@ static void _rtl_rx_completed(struct urb *_urb)
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goto resubmit;
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}
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qlen = skb_queue_len(&rtlusb->rx_queue);
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if (qlen >= __RX_SKB_MAX_QUEUED) {
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RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
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"Pending RX skbuff queue full! (qlen: %d)\n",
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qlen);
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goto resubmit;
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}
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skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV);
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if (!skb) {
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RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
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@ -575,17 +615,8 @@ static void _rtl_rx_completed(struct urb *_urb)
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memcpy(skb_put(skb, size), _urb->transfer_buffer, size);
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/* TODO: Do further processing in tasklet (queue skbs,
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* schedule tasklet)
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*/
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if (likely(!rtlusb->usb_rx_segregate_hdl)) {
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_rtl_usb_rx_process_noagg(hw, skb);
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} else {
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/* TO DO */
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_rtl_rx_pre_process(hw, skb);
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pr_err("rx agg not supported\n");
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}
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skb_queue_tail(&rtlusb->rx_queue, skb);
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tasklet_schedule(&rtlusb->rx_work_tasklet);
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goto resubmit;
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}
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@ -626,6 +657,9 @@ static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw)
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usb_kill_anchored_urbs(&rtlusb->rx_submitted);
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tasklet_kill(&rtlusb->rx_work_tasklet);
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skb_queue_purge(&rtlusb->rx_queue);
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while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
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usb_free_coherent(urb->dev, urb->transfer_buffer_length,
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urb->transfer_buffer, urb->transfer_dma);
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@ -136,12 +136,14 @@ struct rtl_usb {
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void (*usb_tx_cleanup)(struct ieee80211_hw *, struct sk_buff *);
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/* Rx */
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u8 in_ep_nums ;
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u8 in_ep_nums;
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u32 in_ep; /* Bulk IN endpoint number */
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u32 rx_max_size; /* Bulk IN max buffer size */
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u32 rx_urb_num; /* How many Bulk INs are submitted to host. */
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struct usb_anchor rx_submitted;
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struct usb_anchor rx_cleanup_urbs;
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struct tasklet_struct rx_work_tasklet;
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struct sk_buff_head rx_queue;
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void (*usb_rx_segregate_hdl)(struct ieee80211_hw *, struct sk_buff *,
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struct sk_buff_head *);
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void (*usb_rx_hdl)(struct ieee80211_hw *, struct sk_buff *);
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